New and old drivers should understand the characteristics, advantages and disadvantages and daily maintenance of these five kinds of automobile gearboxes.

This article gives you an easy-to-understand understanding.

First, MT (manual gearbox)

1. Carrying models

Representative models:

Manual gearbox is our common taxis, driving school coaches, buses and trucks. In our daily family cars, manual gears are mostly low-end models or low-end models in mid-to high-end models, and its application is very extensive.

2. Advantages and disadvantages

Advantages: Its advantages are mainly mature technology, high stability, convenient maintenance and high driving pleasure..If you are an old driver with skilled driving skills, you will find that the speed of manual transmission is much faster than that of automatic transmission with the same displacement.

?Disadvantages: the operation is complicated, and beginners are prone to flameout, frustration, low gear, high gear and low gear when operating.

3. Use and maintenance

We commonly have four-speed, five-speed and six-speed gearboxes, which consist of four or six forward gears and one reverse gear.

In terms of use and maintenance, the cost of manual transmission is lower than other types.

The failure rate and maintenance cost of manual gearboxes are also lower than those of other gearboxes.

4. Market trends

People’s living habits are increasingly dependent on technology and artificial intelligence. In the ranks of family cars, manual gears will be gradually replaced by automatic gears.

Second, AT (automatic gearbox)

1. Carrying models

Representative models:

At present, automatic gearbox is one of the most common gearboxes in our life.

2. Advantages and disadvantages

?Advantages: stable technology and convenient operation.

?Disadvantages: Compared with other gearboxes, AT gearboxes are expensive to manufacture and difficult to develop.

3. Use and maintenance

AT gearbox gears are divided into:

P: Parking gear, used when parking.

R: reverse gear, used when reversing.

N: neutral, used when waiting for traffic lights or repairing vehicles.

D: Forward gear, used during normal driving.

S: Sport mode, used when overtaking and accelerating.

L: Low gear, that is, 1st gear. When the vehicle is engaged in L gear, it can be locked into 1st gear, and it cannot be upgraded to high gear. It is suitable for climbing or slowing down downhill.

2/3: High-speed engine brake gear, which is equivalent to shifting into 2nd or 3rd gear to lock the vehicle to this gear. It is also suitable for use on ramps or complex roads.

The general oil change cycle of AT gearbox is 2 years or 40,000-60,000 kilometers.

It is recommended to replace the old oil by dynamic oil change, which can fully circulate the old oil and discharge it cleanly. However, the cost is slightly higher.

4. Market trends

AT gearbox with low failure rate is very popular among consumers.

It is still the mainstream in automobile gearbox.

Third, AMT (semi-automatic gearbox)

1. Carrying models

Representative model: Chery QQ3

In China, it is mostly used in A0-class vehicles and heavy-duty trucks.

2. Advantages and disadvantages

?:Simple structure, low cost and convenient maintenance.

?: serious sense of frustration and poor sense of control.

3. Use and maintenance

Driving control is easier than manual transmission.

+upshift

-Downshift

4. Market trends

AMT gearbox is commonly used in medium and large buses and heavy trucks.

Fourth, DCT ()

1. Carrying models

Representative models: Porsche 911,

Dual clutch gearbox first appeared in sports cars and performance cars, and then gradually appeared in family cars.

Different manufacturers have different names.

the public

Audi S-tronic

Porsche PDK

2. Advantages and disadvantages

?Optimize the problem of final power cut-off during gear shifting to achieve the problem of fast gear shifting. High transmission efficiency and improved fuel economy.

?The gearbox is difficult to dissipate heat, and some models have obvious frustration when shifting gears, so manufacturers have high requirements on the accuracy of manufacturing and processing.

3. Use and maintenance

The operating gear is the same as AT gearbox.

The dual-clutch gearbox, whether it is wet or wet, needs no maintenance for life from the structural design of the manufacturer, except for man-made damage.

If a 4S shop or a garage asks you to change the transmission oil and filter element, you must remember that it is a trick to cheat people and cheat money. I hope all car owners will keep it in mind.

4. Market trends

Major manufacturers are constantly optimizing the frustration problem of dual-clutch gearbox. In some high-end models equipped with dual-clutch, the frustration feeling is very small. While enjoying the slight frustration feeling, they can have an extremely fast shift acceleration experience, plus the design of life-long maintenance-free. These are the competitive advantages of dual-clutch gearbox. The development prospect is the best after breaking technical barriers.

V. CVT (Continuously Variable Transmission)

1. Carrying models

Representative model: Nissan

It is the originator of CVT technology, but Nissan is the best one to apply it.

2. Advantages and disadvantages

?Excellent ride comfort, almost zero frustration and good fuel economy.

?: Weak power, limited torque output and complicated maintenance.

3. Use and maintenance

The operating gear is the same as AT gearbox.

The maintenance cycle of CVT gearbox is slightly longer than that of AT gearbox, generally 2/3 years or 50,000-80,000 kilometers.

4. Market trends

Nowadays, the new technology has solved the problem of short service life of CVT in the past. By adopting high-strength and high-quality materials and precision manufacturing technology, the quality and reliability are improved, which greatly improves the service life of CVT gearbox.

However, the power is weak, the torque output is limited, the maintenance is complicated, and some important parts inside the CVT gearbox cannot be processed and manufactured in China. In addition, the era of turbine engines is prevalent, which makes the CVT gearbox have great limitations.

Some of the five common gearboxes mentioned above are simple in structure and easy to maintain, some speed up rapidly, some have high fuel economy, and some are smooth and smooth. Which one do you like? Welcome to comment in the comment area.

My People,My Country Xú Zhēng directed the short film to finish shooting in 11 days.


1905 movie network news On July 21st, the short film "My Motherland and I Won the Championship" directed by Xú Zhēng in the tribute film for the 70th anniversary of the founding of New China was officially finished! The film was officially launched on July 11, and the shooting was completed 11 days later.

My People,My Country is directed by Chen Kaige, with Huang Jianxin as the chief producer. Seven short films directed by Chen Kaige, Zhang Yibai, Guan Hu, Xue Xiaolu, Xú Zhēng, Ning Hao and Wen Muye are connected in series, telling a touching story that ordinary people are closely related to the Republic at the moment of the 70th anniversary of the founding of New China.

Xú Zhēng didn’t announce the specific story content. From the photos, there were scenes of primary school actors, stadiums and Shanghai alleys. Combined with the title of the short film, it is likely to be a sports film.In mid-June this year, Zhang Yibai directed "My Meeting with My Motherland", which was made up ofZhang YiStarring and directing by other directors have not been made public yet.


My People,My Country will be released nationwide on October 1st this year.


Modeling is more domineering. Look at the special police version of "Warrior 917" pioneer chariot.

Chexun. com reportedOn May 23rd, 2023, the 9th (Beijing) International Military Police Anti-terrorism Emergency Equipment Expo was officially opened. In Hall 8, two heavily modified Warrior 917 special vehicles surprised the exhibition and attracted many on-site visitors.

  It is understood that the two models in the booth are the Warrior 917 Anti-terrorism Sudden Car and the Warrior 917 Multi-function Commercial Off-road Vehicle, both of which are based on the Warrior 917 and have undergone many special modifications. Domineering and powerful styling design, distinctive military and police style painting, exterior decoration kits, etc., have made visitors stop to watch.

Modeling is more domineering. Look at the special police version of "Warrior 917" pioneer chariot.

  As a national-level military and police equipment Expo, Beijing International Military and Police Anti-terrorism Emergency Equipment Expo was founded in 2015. It has built an international scientific and technological exchange platform for public security, inspection, law, division, army, armed police, civil air defense and disaster reduction emergency, and is also an industry scientific and technological event to promote understanding, learning, exchange and cooperation between Chinese and foreign counterparts. Now it has developed into the first platform for new products display, technological innovation, experience exchange and grasping the market pulse in the international military and police industry.

  猛士917反恐处突车

  据现场资料介绍,为响应习总书记对民族汽车的要求及国家“双碳”战略,猛土汽车科技公司专为公安特警快反处突需求打造新能源防暴通用战术平台,确保快速响应、梯次到达,配合应对众多复杂警情任务的需求。

Modeling is more domineering. Look at the special police version of "Warrior 917" pioneer chariot.

  猛士917反恐处突车

  猛士917反恐处突车基于中国首个电动越野滑板平台——MORA猛士滑板越野平台打造,长宽高尺寸分别为5096mm×2080mm×2314mm,由于特种改装需要,新车的长与高数据均大于猛士917原型车,轴距与原车一致,为2950mm,整备质量为3500kg。

Modeling is more domineering. Look at the special police version of "Warrior 917" pioneer chariot.

  猛士917反恐处突车车顶特种装置

  猛士917反恐处突车防弹钢板及防弹玻璃满足公安A级防弹标准,防暴涂层、防暴膜满足公安B级防暴标准。此外,还配备全功能的警用作战装备及智能网联警务通信系统。如防爆胎、阻车钉抛撒器、瓦斯喷射器、声波驱散器、无人机等作战装备,可充分满足公安特警快反恐作战、应急处突、要地备勤、现场指挥等作战需求。其智能网联警务通信系统具备采集、抓拍、图传、通联、核查、指令等功能。

  The car has super power of 816 horsepower, the acceleration time of 000 kilometers is within 7 seconds, the comprehensive cruising range is 600 kilometers, and the maximum speed is 195 kilometers per hour. It has the product characteristics of "superior performance, intelligent interconnection, safety and reliability, complete functions, comfortable space and beautiful shape". It is a hard-core warrior in the sense of the new era and can provide strong combat mission support for public security special police.

  Warrior 917 multifunctional commercial off-road vehicle

  Warrior multi-function commercial off-road vehicle is also based on Warrior 917 extended range version. The dimensions of length, width and height are 5096mm×2080mm×1935mm, the wheelbase is also 2950mm, and the curb weight is 3100kg.

Modeling is more domineering. Look at the special police version of "Warrior 917" pioneer chariot.

  Mengshi multifunctional commercial off-road vehicle

  It is reported that the new energy off-road characteristics of the car can provide emergency discharge and all-terrain traffic protection for field emergency rescue; Anti-riot modification can provide safe and reliable body and occupant protection against the gravel risk of damaged road sections; Satellite communication system is designed to provide confidential video conference for confidential tasks, which can guarantee the graphic transmission of field emergency communication; Not only that, but also all kinds of equipment, including rotating seat system, multifunctional desk, printer, video conference system, etc., fully meet the travel needs of officers and men in military and police departments for confidential tasks.

Modeling is more domineering. Look at the special police version of "Warrior 917" pioneer chariot.

  Warrior multifunctional commercial off-road vehicle interior equipment

  Warrior 917 multi-functional commercial off-road vehicle has many leading technologies. Based on the mature chassis technology developed by Warrior Technology, it is a pre-developed chassis for ultra-light assault vehicles. It adopts non-loaded body structure, and the internal high-pressure molded parts have the characteristics of light weight and high strength, ensuring that the vehicle has the characteristics of high maneuverability, high strength and high durability. It can gradually replace the imported models in the fields of emergency rescue and field exploration.

  Special modification scheme of warrior

  It is reported that the two exhibits exhibited by Mengshi Technology are the results of special modification in the industry, reflecting the strong performance foundation and modification potential of its products.

  Previously, the first model created by Warriors Technology and Lorenz in-depth cooperation — — The Warrior 917 Rolex Haute Couture Edition completed its world premiere in Shanghai in April this year. Inspired by the indestructible image of a heavy military armored vehicle, the car is equipped with eye-catching customized roof lights, side ladders, blue wheel eyebrow lights on the side of the car, and a large number of carbon fiber ornaments, which is very futuristic.

Modeling is more domineering. Look at the special police version of "Warrior 917" pioneer chariot.

  Warrior 917 Lorenz Haute Couture Edition

  During the Shanghai Auto Show, Warrior Technology also released the pilot version of Warrior 917 official reform, which adopted the exclusive body design, red brake calipers, 20-inch forged wheels, and loaded the roof platform, side ladders, auxiliary lights and drone systems.

Modeling is more domineering. Look at the special police version of "Warrior 917" pioneer chariot.

  Warrior 917 official reform pilot edition

  It is understood that the Warriors Science and Technology Smart Park has its own custom modification center, which supports the deep customization of vehicles and can meet the personalized high-end customization needs of customers. In addition, Mengshi Technology also cooperates with Lorenz and industry modification partners to jointly develop diversified customized modification schemes to meet the customized needs of different industries, scenes and people.

  Military vehicle gene blessing innovation technology empowerment

  Dongfeng Company is built, prospered and proud of the army. Dongfeng military vehicles have evolved iteratively, providing the people’s army with the largest number of military vehicles with the best quality, and also making important contributions to national defense construction.

  In response to new customer needs and market trends, from 2016, Dongfeng has promoted the expansion of Dongfeng Warriors from the military specialized application field to the public daily tasting consumption field, and is committed to bringing customers an unimaginable off-road experience. Warrior brand also officially opened the road of electrification and luxury in 2020. In 2022, Dongfeng’s luxury electric off-road brand — — Warrior technology is officially released.

Modeling is more domineering. Look at the special police version of "Warrior 917" pioneer chariot.

  Inheriting the warrior military vehicle gene, the warrior technology products adopt many industry-leading electrification and intelligent technologies. Warrior 917 is the first model of Warrior Technology. Based on the development of M TECH Warrior Intelligent Off-road Architecture, it is fully equipped with three hard-core technology clusters: MORA Warrior Skateboard Off-road Platform, MEGA POWER Warrior Power and M ATS Warrior Off-road All-terrain Intelligent Solution.

  Among them, MORA Warrior skateboard cross-country platform is the first electric cross-country skateboard platform in China, which can support both pure electric and extended range power modes. Two special modified vehicles of Warrior 917 are developed based on the extended range version of Warrior 917, and the combination of three motors and 1.5T range extender is adopted, with a comprehensive horsepower of more than 800 horses and a comprehensive cruising range of up to 800km.

  M ATS warrior off-road all-terrain intelligent solution can intelligently choose the most ideal off-road mode according to the terrain change to ensure terrain adaptability and road trafficability. The crab-walking mode of Warrior 917 can make the vehicle run horizontally, which not only has better cross-country passability, but also has more flexibility in changing lanes at high speed and better maneuverability.

Modeling is more domineering. Look at the special police version of "Warrior 917" pioneer chariot.

  The appearance of two Warrior 917 special vehicles in this military and police exhibition undoubtedly shows Dongfeng’s technical confidence, product confidence, brand confidence and value confidence. The empowerment of M TECH Warrior’s intelligent off-road architecture not only further stimulates the modification potential of Warrior 917, but also fully meets the demand of the police special vehicle market and promotes the upgrading of police special vehicles.

Mercedes-Benz EQE SUV in Zhuhai is on sale! The maximum discount is 80,000, and the time is limited.

[car home Zhuhai Preferential Promotion Channel] Recently, we learned that we are enjoying preferential activities in Zhuhai, with a maximum discount of 80,000 yuan, and the minimum starting price has dropped to 406,000 yuan. If you are interested in buying, click "Check the car price" in the quotation form to get a higher discount.

珠海地区奔驰EQE

The design of Mercedes-Benz EQE SUV inherits the design language of Mercedes-Benz family. The front face adopts a unique starlight grille, with sharp LED headlights and sharp LED daytime running lights, creating a highly recognizable visual effect. The body lines are smooth, combined with a dynamic waistline and a wide wheel arch, showing a strong sporty atmosphere. Overall, Mercedes-Benz EQE SUV perfectly combines luxury with modern technology, showing the unique charm of Mercedes-Benz brand.

珠海地区奔驰EQE

Mercedes-Benz EQE SUV has a body length of 4880mm, a body width of 2032mm and a body height of 1,679 mm. With a wheelbase of 3030mm, it shows a spacious and comfortable seating space. The side lines of the car are smooth, and the overall shape shows the combination of movement and elegance. Equipped with 19-inch wheels, the front tyre size is 235/55 R19, and the rear tyre size is also 235/55 R19, which is consistent with tyre size, providing good handling performance and stable driving experience.

珠海地区奔驰EQE

The interior design of Mercedes-Benz EQE SUV presents a modern and luxurious style. The center console is equipped with a 12.8-inch touch screen, which integrates the functions of multimedia system, navigation, telephone, air conditioning and sunroof control, and can be easily controlled by intelligent voice recognition system. The steering wheel is made of leather, which supports electric up and down and forward and backward adjustment, providing a comfortable driving experience. The car is equipped with USB and Type-C interfaces. There are 3 interfaces in the front row and 2 interfaces in the back row, which meets the charging needs of passengers. In addition, the front seats are equipped with heating and ventilation functions, and support electric adjustment, including front and rear adjustment, backrest adjustment, height adjustment (4-way), leg rest adjustment and lumbar support (4-way). The rear seats support proportional tilting, providing more storage space. The seat is made of imitation leather, which provides passengers with good comfort and support.

珠海地区奔驰EQE

Mercedes-Benz EQE SUV is equipped with an excellent motor with a maximum power of 300 kW and a maximum torque of 858 Nm, which provides a strong power output and a smooth driving experience for the vehicle.

It is said that although the power performance of Mercedes-Benz EQE SUV is acceptable, the flexibility of the vehicle is not good because the low-profile model is not equipped with rear wheel steering function. As an owner of an oil tanker, he mentioned that there is still a gap between the handling experience and the BMW 3 Series, especially when encountering a big pit, the body shakes more and the overall feeling is soft.

Master the core technology! Technical Analysis of Buick Micro Blue Battery

  [Aika Auto New Energy Channel Original]

  In July, the sales volume of Buick Micro Blue 6 pure electric vehicle reached 3,411, ranking third in the new energy sales list in that month, which was a big breakthrough for Buick and SAIC-GM. As consumers have higher and higher requirements for the quality and safety of new energy vehicles, SAIC-GM’s huge investment in the new energy field has finally been recognized by the market.

Technical Analysis of Buick Micro Blue Battery

  Also in July, new cars Buick Micro Blue 6 PHEV and Micro Blue 7 were officially launched, which further expanded SAIC-GM’s new energy camp. These two new cars have many unique features in the three-electricity technology, especially the battery system adopts soft battery cells which are rare in China. Let’s talk about the technical characteristics of the battery system of Buick light blue model.

Test drive micro blue 6 PHEV

Analysis of universal brand-new electric platform

Technical Analysis of Buick Micro Blue Battery

Technical Analysis of Buick Micro Blue Battery

Detailed explanation of buick VELITE6 battery system

Detailed explanation of buick VELITE6 battery system

Technical Analysis of Buick Micro Blue Battery

Technical Analysis of Buick Micro Blue Battery

Technical Analysis of Buick Micro Blue Battery

Technical Analysis of Buick Micro Blue Battery

Detailed explanation of buick VELITE6 battery system

Detailed explanation of buick VELITE6 battery system

Detailed explanation of buick VELITE6 battery system

Technical Analysis of Buick Micro Blue Battery

Technical Analysis of Buick Micro Blue Battery

Technical Analysis of Buick Micro Blue Battery

 

Loudi BMW i4 price cuts hit! The discount is 104,500 yuan, which is very beneficial today.

[car home Loudi Preferential Promotion Channel] At present, preferential activities are being carried out in Loudi, with the highest discount reaching 104,500 yuan. The lowest starting price after the latest discount is 380,600 yuan. Interested friends, please click "Check the car price" in the quotation form, and strive for higher discount.

娄底宝马i4降价来袭!优惠10.45万,今日钜惠

The exterior design of BMW i4 embodies the innovative spirit of BMW brand. The front face design adopts the classic kidney-shaped air intake grille, but its internal structure is more futuristic. With the sharp LED headlights, it shows a strong visual impact. The body lines are smooth, and the waistline on the side extends from the front to the rear, which enhances the dynamics of the body. On the whole, the exterior design of BMW i4 not only retains the traditional elements of BMW, but also incorporates the modern style, showing its unique charm.

娄底宝马i4降价来袭!优惠10.45万,今日钜惠

The body size of BMW i4 is 4785 * 1852 * 1455mm, and the wheelbase is 2856mm. It uses streamlined body lines, and the waistline extending from the front fender to the rear outlines a beautiful curve. The front track is 1601 mm and the rear track is 1630 mm, which ensures the stability and handling of the vehicle. The equipped tyre size is the front 245/45 R18 and the rear 255/45 R18, respectively, which is matched with the fashionable and sporty rim style to enhance the visual impact of the whole vehicle.

娄底宝马i4降价来袭!优惠10.45万,今日钜惠

The interior design of BMW i4 embodies the combination of sports and technology. The center console uses a 14.9-inch LCD screen and is equipped with multimedia system and navigation function. Through the voice recognition control system, users can easily operate multimedia system, navigation, telephone and air conditioner. The steering wheel is made of genuine leather, with manual up-and-down and forward-and-backward adjustment functions, so that the driver can find the best driving posture. The interior is also equipped with two front and two rear USB and Type-C interfaces, as well as the front wireless charging function, which is convenient for passengers to charge at any time. In terms of seats, i4 provides the choice of imitation leather, genuine leather and leather /Alcantara mixed materials. The main and co-pilot seats have heating function and are equipped with various adjustment methods, including front and rear adjustment, backrest adjustment, height adjustment, leg rest adjustment and lumbar support. In addition, the driver’s seat is equipped with electric seat memory function to provide the driver with personalized comfort experience. The rear seats can be laid down in proportion to increase storage space.

娄底宝马i4降价来袭!优惠10.45万,今日钜惠

The BMW i4 is equipped with a powerful motor, with a maximum power of 210kW and a peak torque of 400 Nm, which ensures excellent dynamic performance and response speed during driving.

It means that the configuration parameters of Series I’s 3, 5 and X3 are almost the same, only the shell is different, but he wants to buy I4 for more than 100,000 yuan, just for its face value and personality. Of course, as an imported model, he doesn’t need to buy the trouble of deducting the sign after going home. The design of big nostrils is not mediocre at first glance. Every time he drives out, others often guess that the car is worth 600 thousand, which makes him feel embarrassed.

Lingyu shopping guide Ford "fuel-saving king"

Today we brought this car. Let’s take a look at its performance.

Let’s look at the appearance of Lingyu first. The front style of Lingyu looks full and sporty. Coupled with the capable headlights, the recognition is very high. The car is equipped with LED daytime running lights, front fog lights, automatic opening and closing, adaptive far and near light, automatic steering, delayed closing and so on. Coming to the side of the car, the body size of the car is 4905 mm * 1930 mm * 1755 mm. The car adopts solid lines, and the side wall presents a hard-core design style. With large-sized thick-walled tires, the shape is eye-catching. Looking back, the rear of the car echoes the front of the car, and the taillights give people a very soft feeling. Together with the unique exhaust pipe, it creates a good gas field.

Sitting in the car, the interior of Lingyu looks very capable, which is very in line with the tastes of young consumers. The steering wheel of the car is very fashionable and simple, and it is made of leather, which looks a little more simple. From the central control point of view, with the 12.3-inch central control screen, the interior style is impressive, and the overall design of the central control is very good. Let’s take a look at the dashboard and seats again, and the shape has taken the movement route. The car uses a mix of leather/suede seats, and the seat wrapping is in place, and the overall comfort is good.

Lingyu matching wet dual clutch (DCT) gearbox, the maximum power is 165KW, the maximum torque is 360N.m, and the power performance is good.

The headroom performance is good, and the leg head space is quite comfortable, which brings a better ride experience. In addition, the car is equipped with anti-lock braking (ABS), LED daytime running lights, brake assist (EBA/BAS, etc.), braking force distribution (EBD), traction control (ASR/TCS, etc.), main driver airbag, co-pilot airbag, knee airbag, side airbag curtain, front airbag and other safety configurations.

OK! Next, let’s sum up. The moderate size of the car is a very suitable choice for many families, and the internal space is enough for daily use in families.

Legal experts can’t handle academic counterfeiting. Who will judge plagiarism?

  When the duplicate checking report showed that the document copy ratio of the paper was over 50%, Yao Hongjun once thought that the plagiarism he wanted to report was "certain".

  The associate professor of the School of Law of Shanghai University of Political Science and Law has been concerned that Hou Huaixia, the president of our school, is suspected of "plagiarism" for 9 years. The duplicate check report of China HowNet provided by him shows that the copy ratio of Hou’s doctoral thesis is 55% except his published literature, and the other five journal articles are 97.8%, 69.1%, 55.4%, 53.1% and 47.6% respectively.

  Relying on these duplicate checking reports, he wrote a tip-off letter to the higher education authorities, reflected the situation with the schools involved, called the authors of journals and papers one by one, and posted on the Internet. The result was without exception.

  The Shanghai University of Political Science and Law, where Hou Huaixia works, responded that it did not constitute academic misconduct, and China Ocean University, the alma mater who awarded him his doctorate, recognized it as "not minor plagiarism". A professor from the Academic Committee of Haida University made it clear that Hou’s paper was flawed, but it was by no means plagiarized. "The survey materials are informative, and we are always waiting to report to the relevant departments."

  Yao Hongjun, who passed the judicial examination with a score of 272 and studied intellectual property law, was puzzled. In order to find out the facts, the information in his computer has been saved for several g’s, but it seems that the more information he has, the farther away he is from the truth.

  In fact, not only Yao Hongjun, but also the experts who participated in the evaluation are faced with difficulties: there are errors in duplicate checking of HowNet, manual evaluation is not trusted, and there is no unified standard for academic plagiarism … …

  Faced with this "plagiarism" appraisal, they are also thinking: when academic plagiarism is discussed overwhelmingly, what is the most accurate evaluation standard? Where is the boundary between plagiarism and non-plagiarism?

  Experts "deny" the results of the duplicate checking system.

  As a colleague, Yao Hongjun first paid attention to Hou Huaixia’s "suspected plagiarism" in May 2010. After reading a paper she published in a journal, he suddenly felt "some problems".

  He has read many articles by Hou Huaixia. "She has published many articles in a wide range of fields, including litigation law, advertising law, environmental law, intellectual property rights, foreign investment and corporate responsibility, but her research direction is relatively fixed, and the research in the legal field has been subdivided in 2000." In Yao Hongjun’s view, such a "multi-faceted attack" by Hou Huaixia is basically impossible.

  Yao Hongjun put many academic articles of Hou Huaixia into HowNet to check them again. Among them, Hou Huaixia’s doctoral thesis "Research on Environmental Rights and Their Relief in Private Law" is shown in the duplicate check report of HowNet, which coincides with the contents of 25 published papers.

  According to the statistics of each chapter, the copy ratio of Hou Wen excluding his published literature is: preface 30.6%; The first chapter is 49.8%; Chapter II 54.1%; Chapter III 57%; Chapter IV 62.8%; Yao Hongjun calculated that, on the whole, the copy ratio of the whole article except my published literature is about 55%.

  This report on duplicate checking of HowNet was generated in 2015, and Hou Huaixia passed the defense on June 6, 2008. The copied articles listed in the report also included some articles published after the publication of Hou Wen.

  In order to "prevent errors", Yao Hongjun conducted a manual comparison. He circled the words in Hou Wen that were more similar to others. "The most conservative estimate is more than 60,000 words."

  Hou Huaixia’s doctoral thesis has a total of more than 160,000 words. According to Yao Hongjun’s algorithm, these similarities account for at least 36% of this thesis.

  In 2010, China Ocean University, where Hou Huaixia graduated, promulgated the Measures for Handling Academic Misconduct of Postgraduates of China Ocean University, in which Article 10 states: The whole paragraph with the same content accounts for more than 30% of the whole academic achievement, or the academic achievement of others is regarded as the main part or substantial part of his own academic achievement, which constitutes serious plagiarism; It accounts for 10% and is not the main innovation, which also constitutes mild plagiarism.

  Official website from the Graduate School of Shanghai University of Political Science and Law shows that Hou Huaixia was admitted to China Ocean University in 2004, majoring in environmental planning and management (direction of environmental resources law). On June 6th, 2008, she finished her graduation thesis.

  According to the duplicate checking report of HowNet provided by Yao Hongjun, another five journal articles of Hou Huaixia were also accused of plagiarism. Analysis of the Meaning of Monopoly published in 2004, Establishment and Perfection of China’s Credit System published in 2006, On the Environmental Rights in the Constitution and on the Commercial Subject Nature of Sole proprietorship Enterprises published in 2007, and On the Environmental Rights in Human Rights Law published in 2009, except for my published documents, these papers accounted for 53.1% and 69.1% respectively.

  Yao Hongjun believes that these data show that plagiarism is a clear fact. However, the conclusion given by academic degree evaluation committee Office of China Ocean University is that Hou Huaixia’s doctoral thesis is not enough to constitute mild plagiarism; The conclusion of Shanghai University of Political Science and Law is that Hou Huaixia’s journal articles do not constitute academic misconduct.

  This "fact" was also refuted by Hou Huaixia himself. She told China Youth Daily and Zhongqing Online reporter that copying is marked by common sense and laws and regulations, and she either directly quoted or indirectly used other people’s opinions. "This academic norm is allowed."

  Hou Huaixia insisted: "I didn’t infringe and take other people’s things in any way. Whether I copied the current school has reached a conclusion. These conclusions are based."

  She also said that one of the journal articles, "On the Commercial Subject Nature of Sole proprietorship Enterprises", was actually "copied by others, and I published the essays first". As for the specific information of this collection of essays, she said that "time is too long to remember."

  "I don’t have those problems. If it really constitutes plagiarism, I am willing to bear any responsibility. " Hou Huaixia said.

  Believe in machines or people?

  Yao Hongjun couldn’t understand: "I also studied law. Isn’t it enough to confirm that the evidence in black and white is here?"

  In his view, the high "copy ratio" is an irrefutable fact.

  However, in the eyes of Li Qi, an expert who participated in the appraisal of Hou Huaixia’s thesis by the Academic Committee of China Ocean University, the figures in the duplicate checking report are not necessarily convincing.

  Li Qi admitted that "Hou Huaixia’s paper is flawed", but he also stressed that "this is by no means plagiarism".

  According to him, the duplicate checking of HowNet will mark the same sentences, but it can’t make a more subtle division. In particular, Hou’s doctoral thesis belongs to the category of law, which involves citing a large number of laws and regulations.

  In his impression, Hou Wenzhong was reported the same part, covering popular science narrative, news reports, and related laws and regulations, which should be comprehensively judged according to the actual situation.

  "Some historical summaries are sometimes inaccurate in their own words. It is better to directly quote existing statements." Li Qi said. "Checking the duplicate of HowNet cannot be used as the only criterion to judge academic plagiarism."

  Since 2007, the problem of academic misconduct has been paid more and more attention. Some colleges and universities require that both master’s thesis and doctoral thesis need to be checked by CNKI, and only after passing the test can the thesis be defended. This requirement has subsequently been extended to the undergraduate stage.

  Compared with manual screening, its database is huge, the screening standard is unified, and the working cycle is short. In the face of an increasing number of papers, it ensures the review speed, and it has gradually become an irreplaceable "first line of defense" for academic screening.

  In 2012, the Ministry of Education promulgated the Measures for Handling False Dissertations, and in 2014, it promulgated the Measures for Sampling Doctoral Dissertations. Judging from Baidu’s search index, the search index of HowNet’s duplicate checking has increased since 2012.

  However, even though HowNet duplicate checking is a relatively reliable duplicate checking tool in China at present, there is a certain difference between machine detection and human identification, and some disputes about academic problem identification often arise as a result.

  Li Qi said that after the introduction of HowNet, academic circles often regard "copy ratio" as the only criterion to judge whether a paper is qualified or not. The problem is that many excellent papers are promoted on the basis of existing achievements, and there are outstanding innovations, but there may also be many similarities, which are easy to be copied and killed by this indicator; Others have found a shortcut — — You can have no opinion, but you should be able to package it in a fresh way.

  In Li Qi’s view, on the one hand, HowNet does ensure the originality of the paper, but at the same time, it also "encircles the gentleman and lets go of the villain".

  This loophole has been rigidly pegged by many people. In the market, a so-called "anti-knowledge network duplicate checking" became popular, and various paper detection systems came into being. Open Taobao, and the software that sells more than 550,000 pens a month can also provide "weight reduction" service.

  Take this software, for example, it can automatically calculate the "weight reduction" price of the paper according to the duplicate check of the paper. If the demand is urgent, it will need to add more money after 24 hours of processing. During the graduation season, the price of the paper check and the "weight reduction" service in this shop rises sharply.

  It has been concluded that those who attempt to plagiarize can avoid the duplicate checking of HowNet in various ways, while those who devote themselves to the creation may not pass because of citation problems.

  "In the final analysis, the existence of the HowNet duplicate checking system is for convenience, not absolute." Chu Zhaohui, a researcher at the China Academy of Educational Sciences, said, "Whether academic misconduct should be judged by professional organizations and professionals."

  Xiong Wenzhao, a professor at the Law School of Minzu University of China who has paid attention to many academic plagiarism incidents, also agrees with this statement. He said that the similarity of the statistics of HowNet’s duplicate checking system can be used as a hint, and whether it constitutes plagiarism must be further identified and analyzed.

  Among the numerous academic misconduct, most of the targets of academic counterfeiting come from obvious plagiarists who directly carry other people’s works. As a more subtle way, "soft" plagiarism is not easy to attract people’s attention.

  Besides "softness", there is a broader category — — "Hidden" plagiarism. A student studying in a well-known domestic university revealed to the reporter of China Youth Daily and Zhongqing Online that his graduation thesis co-authored with his tutor was "occupied" privately by his tutor: abbreviated as a short paper, and secretly published in a journal in his own name. The tutor explained that only one author appeared as a "periodical requirement"; However, the journal responded that "this situation is basically impossible".

  Even for professional organizations and professionals, it is a difficult problem to identify and analyze plagiarism. For example, what can be the criterion for judging plagiarism in the middle zone where the boundaries are not clear?

  Li Qi’s method is to judge whether the author has put forward a new point of view. But the problem is, "the opinion machine can’t recognize it and needs to rely on human evaluation. But people are hard to be trusted. "

  They can only return to the software again, and the professor is helpless, "but the software can’t be error-free."

  In fact, in foreign countries, screening papers mainly rely on such anti-plagiarism detection systems. Turnitin is the most widely used system in foreign universities.

  Turnitin will compare the documents uploaded by users with the articles in the background database, calculate the proportion of similarity, and "original report" containing a lot of relevant information.

  But this system has an extremely huge database: over ten thousand different periodicals and magazines, millions of books and tens of billions of web pages. It also adopts intelligent corpus technology — — Even if you rewrite the original, it will be exposed.

  Can new technology detect old problems?

  Liu Huirong, who was written by Hou Huaixia in his doctoral thesis "Thanks", is now the Party Secretary of the School of Law and Politics of China Ocean University. Hou Huaixia said that Liu is his friend, former leader and colleague, and he gave himself a lot of encouragement during his reading.

  Liu Huirong told the China Youth Daily and Zhongqing Online reporter that in 2008, at that time, there was no means to check the defense in the college. The review of Hou’s thesis is the review of the content by the members of the defense team through several layers of comments.

  "There was no problem at the time." She stressed.

  In her view, the problem is the report itself. "Hou’s doctoral thesis was published in 2008, and the whistleblower was detected by HowNet’s duplicate checking software in 2015. This is to detect past articles with current software and standards."

  She said that, firstly, the articles that HowNet detected as "reference" covered the articles published after Hou Wen’s publication, and it is hard to say who can learn from them; Secondly, the times are different, and it is not reasonable to trace and characterize the academic misconduct of past articles with the current standards. Even from a legal point of view, there is a saying that let bygones be bygones.

  In 2009, the Ministry of Education promulgated the Guidelines for Academic Norms of Humanities and Social Sciences in Colleges and Universities. In fact, after being accused of plagiarism, there are always universities and parties who respond: "The published papers were published earlier than the various specifications."

  Zhang Shiyou, a professor at the School of Politics of Chongqing Normal University, has been teaching for 21 years, and 10 papers have been accused of plagiarism. During this period, the title was promoted from lecturer to professor and transferred to another university. At least 8 of these papers "quoted" a large number of references at the end of the paper, and some almost all of them were composed of multiple references.

  In this regard, Zhang Shiyou gave the statement that most of the reported papers were published before 2005. "Does it constitute so-called academic plagiarism or academic misconduct? It is really different from the standards 10 years ago."

  Cai Hongying, dean of the School of Finance and Public Administration of Hubei University of Economics, was publicly reported for "academic misconduct". More than half of her two papers quoted other people’s published papers. The monographs published during her Ph.D. were similar to those published by others in some chapters, and two articles were suspected of being submitted for more than one manuscript.

  However, the academic committee of the school decided that the publication time of Cai Hongying’s two papers was before the implementation of the regulations. At that time, the academic research management in the humanities and social sciences in colleges and universities across the country had not been fully standardized, and the phenomenon that the citations were not standardized was common, which was also allowed by the magazines that published the two papers. "There are academic problems that are not standardized, but they do not belong to ‘ Academic misconduct ’ Behavior. "

  Although it has long been strange, in Xiong Wenzhao’s view, "old problems cannot be traced back with new technology", the key point is to distinguish whether the main criteria for judging plagiarism have not changed for a long time — — For example, no matter what period, large-scale overlap is not allowed.

  "In the case of certain standards, this is just using new technologies to detect problems that have not been discovered before." He said.

  Who is in charge of plagiarism or not?

  As a member of the Academic Committee of China Ocean University, Li Qi remembers that after receiving the report materials, the school set up an expert group, but it was a "heavy workload" to study Dr. Hou Huaixia’s thesis.

  From analyzing the paper to writing the report, Li Qi spent two whole days. Plus some procedures stipulated by the school, it took almost a month before and after.

  He studied all the relevant domestic and foreign norms, but found that there are still many vague areas that cannot be covered by the provisions. He even created a set of evaluation criteria, holding the paper "word by word", but whether the paper is plagiarized is still "a very difficult thing to define".

  "First of all, there is no regulation on plagiarism at home and abroad; Secondly, specific to each paper, hard standards do not work, depending on the situation. " He said that this process needs a lot of discussion and discussion, and there is no way to apply the duplicate checking system mechanically.

  He said that the Academic Committee of China Ocean University was "independent" and had gone through all the necessary procedures as required. He himself did not keep the detailed analysis report of Hou’s thesis.

  China Youth Daily Zhongqing Online reporter contacted the Academic Committee of the Law School of China Ocean University, and the other party said that the relevant situation was in the charge of the discipline construction and degree management office of the graduate school, and no one answered the phone of the office.

  However, such a review result, which made Li Qi struggle, was not recognized by the reporter Yao Hongjun.

  For a long time, professors in colleges and universities have been accused of "plagiarism" and submitted to the academic Committee of the university for review, and the conclusions are mostly "over-quoted" or irregular, which has also been questioned as "demotion".

  Xiong Bingqi, vice president of 21st Century Education Research Institute, believes that the independence of academic committee is very important to the review results.

  At present, the scientific research departments under the academic committees of many universities in China, even independent institutions, may be interfered by administrative factors, and it is difficult to ensure that the review of reports is fair enough.

  Moreover, identifying plagiarism is not just a difficult problem for colleges and universities. Many periodical articles reported by Yao Hongjun that Hou Huaixia was suspected of plagiarism were published before the publication of HowNet duplicate checking system.

  China Youth Daily Zhongqing Online reporter contacted Journal of Suzhou University and Journal of Zhengzhou University (Philosophy and Social Sciences Edition), which Hou Huaixia had published.

  As a core journal, Kang Jingkui, the editor of Journal of Suzhou University who was in charge of Hou Huaixia’s articles, said that according to the current processing method, the delivered articles were first screened by HowNet, and the copy ratio was less than 20% before entering the editing process. At that time, the screening process of publications provided opinions for preliminary duplicate checking and external audit experts, which were all passed, and then the editorial department typesetted according to the situation.

  Today, Kang Jingkui can’t remember the specific duplicate checking operation at that time. He recalled to the China Youth Daily and Zhongqing Online reporter, "See if anyone else has sent similar articles before, whether it is more than one manuscript, and also look at the author’s academic background."

  "Most of them are based on impression, according to the usual grasp of the manuscript". He said, "At best."

  Su Wei, the head of the economics section of Journal of Zhengzhou University (Philosophy and Social Sciences Edition), also gave a similar response.

  "At that time, before the duplicate checking system appeared, there was simply no systematic duplicate checking." He explained that in general, the editorial department will search the full text of the submitted article on Baidu; After that, experts review, relying on experts’ familiarity with the author and the field, and sometimes intuition, to see if the article is inconsistent with the author’s professional title, education and research direction.

  "We are also very difficult. If the author copies a whole book, it is difficult for us to know. " He repeatedly stressed, "It was really hard at that time."

  "The biggest problem in the field of academic evaluation in China is non-standardization. First, the authors are not standardized, and second, academic journals are not standardized when publishing manuscripts." Chu Zhaohui said.

  In this regard, Chu Zhaohui’s suggestion is to strengthen the construction of third-party evaluation institutions outside the school, so that third-party institutions can judge the facts, and then the school administrative department will impose penalties.

  Difficult road to safeguarding rights

  These mechanisms have not been established yet. As a whistleblower, Yao Hongjun said that he spent most of his time waiting for this report.

  Since May 2015, he began to report the materials in his hand. More than a year passed, and Yao Hongjun and others came to the Letter of Notification of Investigation Conclusions made by academic degree evaluation committee Office of China Ocean University.

  In December of the same year, Yao Hongjun began to report Hou Huaixia’s academic misconduct to the Shanghai University of Political Science and Law where Hou Huaixia worked. Unexpectedly, things dragged on for more than a year.

  "Even according to the regulations, the processing period is at most 90 working days." Yao Hongjun said, in fact, Article 8 of the Detailed Rules for the Implementation of the Construction of the Style of Study of Shanghai University of Political Science and Law also states that after receiving the report, the school should formally organize personnel to conduct an investigation within 30 working days, and the investigation team should complete the stipulation of fact finding within 60 working days.

  On June 9, 2017, Shanghai University of Political Science and Law gave the conclusion, which stated: "The establishment and perfection of China’s credit system" and "On the commercial subject nature of sole proprietorship enterprises" published by Hou Huaixia in the name of Shanghai University of Political Science and Law do not constitute academic misconduct. "

  On July 5, 2017, Yao Hongjun applied to Shanghai University of Political Science and Law again, asking it to make the accreditation standards public and make a new accreditation.

  This time, the school gave a quick answer. Two weeks later, Yao Hongjun received the results, saying, "Re-appraisal is tantamount to repeating procedures and appraisals, wasting resources, and the academic committee of the university will not accept this application for review", but it did not respond to the requirements of the public accreditation standards.

  Yao Hongjun, who studies law, can’t recognize such a result, and he still wants an "absolute truth".

  According to the Science and Engineering Index released by the National Science Foundation in 2018, China surpassed the United States for the first time in the number of published papers, but the citation rate of American papers was higher. According to the statistics of AEIC Academic Exchange Center, last year, there were 15 publicly discussed plagiarism incidents in Chinese universities, among which there were many first-class universities in China.

  This is also one of the reasons why he insisted on reporting. In Yao Hongjun’s view, figuring out the vague areas of Hou Huaixia’s papers is not only related to individuals, but also related to the overall standards of academic evaluation in China.

  "In the school of political science and law, especially among doctors of law, all standards and rules, even hidden rules, can be discussed." He said.

  (At the request of the interviewee, Li Qi and Su Wei are pseudonyms.)

  China Youth Daily Zhongqing Online Reporter Wang Jingshuo Intern Guo Xiaoyang An Fengyi

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