On September 4, the 2023 Smart China Expo (hereinafter referred to as "the Expo") opened in Chongqing Yuelai International Convention Center. On behalf of the universities in the regional cooperation exhibition area, Chongqing University exhibited a total of 58 scientific and technological achievements in the largest exhibition hall for universities, involving smart car networking, smart energy, smart construction, smart comprehensive health, intelligent perception, future energy, advanced manufacturing, green sustainability and many other fields.
Themed on "Big Data and Intelligentization", a series of breakthrough progress and landmark achievements, such as the large-scale solar directional device in the space station, ISBI universal intelligent computing platform, narrow linewidth laser, and agv dynamic wireless power supply, concentrated on demonstrating the strong kinetic energy and youthful vitality of Chongqing University in scientific research, innovation-driven development, integration of industry and education, and transformation of achievements.
It is reported that compared with the past, Chongqing University exhibited the largest number and scale of scientific and technological achievements at this Expo. It was also the first time to take the comprehensive "bidirectional communication" between transfer and transformation of scientific and technological achievements and scientific and technological innovation as the basis for exhibition of achievements, which not only focused on the scientific and technological innovation, but also promoted the development of technological productization and industrialization, making great contributions to the construction of modern cities. In addition to the "Amazing Fresh-keeping Device" launched last year which boosted the overseas sales of Wushan Crispy-sweet plums, attracting popularity, Chongqing University "hits a new high" again this year by exhibiting brilliant works.
Integration of industry and university based on Chinese large model drives the era of universal intelligence
This large model realizes "precision and advance"
In the future, thousands of industries can easily build their own exclusive large models, and even everyone may have a customized large model and a "virtual AI assistant". This is the computing scene that Chongqing University's ISBI universal intelligent computing platform is trying to build. This computing platform is developed by the brain perception and universal intelligence team led by Professor Zhou Xichuan of Chongqing University. At the Expo, this product attracted great attention in the field of AI.
How to break through the root node technology in Chinese AI field and realize a safe and reliable large model training platform? Chongqing University and Huawei jointly propose a solution. "ISBI universal intelligent computing platform breaks through the key technology of large model in edge computing and features system-level information security. As a full-stack large model development tool based on Huawei AI hardware, it is characterized by independent hardware control and data security not available for cloud storage, greatly reducing the cost of private large model development training." Zhou Xichuan, head of research and development of edge computing platform of ISBI large model, introduced.
At the same time, the GADL@LAW model is released, which is a large model of legal vertical field developed based on OpenGADL software with the support for major national support to satisfy the critical needs of Chinese construction of "digital rule of law and smart justice" and to solve the complicated and changeable judicial trial problem of environmental protection cases.
In the future, this product can be widely used in the application of large model technology in key security-oriented industries such as finance, medical care, energy, social governance and national defense. Building a large AI model that is unique to all industries, enterprises and even individuals can contribute to driving the digital transformation of society into the era of universal intelligence.
24-hour "solar directional device"
"Tiny part" helps space exploration
Pinion gear plays a significant role! At the Expo, the special device of "big iron ring" and pinion gear brought by the State Key Laboratory of Mechanical Transmissions of Chongqing University looks ordinary, but it is a 1: 1 physical object of "constructed tooth pairs transmission" for the large-scale solar directional devices in "Wentian" and "Mengtian" Lab Modules, i.e. the aerospace part that helps space exploration.
Last year, countless Chinese people were excited by the news that the Chinese Space Station successfully launched Wentian and Mengtian Lab Modules. The successful launch of "Wentian" and "Mengtian" Lab Modules were supported by the hard work and wisdom of numerous Chinese scientist teams. The "constructed tooth pairs transmission" used in the solar directional devices of Wentian and Mengtian Lab Modules was independently developed by the research team of Chongqing University for eight years.
Zhang Luhe, an assistant researcher from Professor Chen Bingkui's team, said that this product can ensure that the solar wings of the entire lab module can track the sun 24 hours a day when it is working, thus ensuring that the sun shines vertically on the solar wings, making the solar wings have the highest power generation efficiency and providing a continuous power supply for the space station.
In addition to solar direction, the research team has achieved a number of technological breakthroughs in the face of severe requirements such as large temperature difference, large deformation, long life and high reliability in the extreme environment of space. The relevant technological theories of this product have been tested and verified on high-end equipment such as new generation aircraft and ships, providing technological support for the development of national defense equipment.
Better performance but lower cost
Annual output of 1,240 kWh of clean electricity
With whirring wind turbine blades and white frame and supported by four bars at the lower part, this is the world's first scaled-down model of 165-meter prestressed concrete filled steel tubular lattice wind turbine tower.
"Considering the increasing unit capacity of Chinese onshore wind turbines, the significant increase of hub height and the continuous increase of blade length, we propose a prestressed concrete filled steel tubular lattice tower suitable for large-capacity and high-hub wind turbines." Wang Yuhang, Vice Dean of the School of Civil Engineering of Chongqing University, said that the seriously stressed lower part of the tower is a concrete filled steel tubular lattice column, which is welded by four concrete filled steel tubular corner columns and diagonal hollow steel tubes, and vertical long-through prestressed tendons are added in the concrete filled steel tubular corner columns. The slightly stressed upper part still adopts the traditional steel tower cylinder.
"Such design has two advantages," Wang Yuhang said. On the one hand, it can give full play to the strength of materials, avoid the cracking of concrete in steel tubes, and have high stress efficiency; On the other hand, the tower can be connected by bolts, which is easier to install and more flexible.
"Compared with the traditional tower structure, its comprehensive cost can be reduced by more than 20%," said Wang Yuhang. The tower has been successfully installed and put into use in Dezhou, Shandong Province, realizing the first application of wind turbines with concrete filled steel tubes at the hub height of 160 m and above, and it is expected to generate more than 1,240 kWh of clean electricity every year.
Why is the intelligent cabin smart?
Chinese first comprehensive evaluation software of human-computer interaction is to reveal the secret
In view of various automobile intelligent cabin products with different styles and distinctive features emerging in the market, how to make a systematic, objective and scientific diagnosis on their user experience level?
Manual evaluation inevitably has subjectivity. This comprehensive evaluation platform software V1.0 released by the School of Mechanical and Vehicle Engineering of Chongqing University can truly, objectively and accurately evaluate the subjective and objective values such as performance, load, safety and satisfaction of drivers and passengers facing various road scenes, cabin functions and driving interaction experience during travel, and form real-time observation and quantitative data.
Guo Gang, the project leader, said that the innovation of the software is to take the lead in building a subjective and objective comprehensive evaluation model and platform software that dynamically combines scenes, functions and evaluation indicators. It is mainly used in subjective and objective tests and evaluations such as intelligent connected vehicle driving experience, ADAS interactive experience, usability of on-board information system-safety, seat comfort for driving position, motion sickness management for electric vehicle passengers, and driver monitor system (DMS).
Guo Gang also said that the software is the first comprehensive evaluation platform for the user experience of the intelligent cabin in China, and has formed commercial software products, which is widely used in enterprises and institutions such as Changan Automobile, SAIC-GM-Wuling Automobile, GAC Research and Development Center, Huawei, China Automotive Engineering Research Institute Co., Ltd., China North Vehicle Research Institute, Shenzhen University, etc.
Architectural 3D printing
Explore more possibilities of low carbon and integration
We are no stranger to 3D printing, but what if we use cement-based composites to print a pyramid-like exquisite or low-carbon, integrated modern smart infrastructure?
Sun Junbo, Deputy Head of the Science and Technology Development Department of Liyang Smart City Research Institute and Deputy Director of Smart Construction Research Center, Chongqing University, said that the research and development results in cooperation with the self-developed 3D model slicing and printing path planning software can achieve a high degree of design flexibility, complete various regional filling schemes according to printing requirements and slice by layers and groups for multiple models to adapt to different printing scene requirements.
In addition, the device also supports continuation after disrupted printing and printing pause, and is equipped with three-axis limit alarm and brake locking functions to protect the safety. The servo motor adopts high torque synchronous belt transmission to ensure the stability and accuracy of transmission, and the special conveying system can be controlled by stepless speed changing.
In the future, it can be applied to many fields, such as housing, architecture, garden, industry, etc. 3D printing technology can not only manufacture various shapes of architectural components quickly and accurately, but also improve the construction efficiency and quality and reduce the cost. Furthermore, it can also fabricate complex components that are difficult to realize by traditional technology, providing more possibilities for architectural design.
Overcome "mountains of difficulties" to realize new technology and harvest "desired achievements"
Highly coherent narrow linewidth laser helps ultra-precision intelligent sensing
Chongqing is built leaning the mountains and across the rivers. Various supply pipelines are arranged in a cross and complicated layout and are extremely difficult to conduct manual inspection mainly based on observation and experience. Now, this scientific and technological achievement of "highly coherent narrow linewidth laser" developed by Chongqing University can effectively change this situation. It is also an embodiment of Chongqing University working in the field of scientific and technological achievement transformation.
What is laser linewidth? Laser linewidth is a physical quantity characterizing the laser spectrum width, which is used to quantitatively describe the monochromaticity of laser. The narrower the laser linewidth, the better the monochromaticity and the stronger the coherence.
At the Expo, Chongqing University exhibited its new generation of highly coherent light source-narrow linewidth laser with completely independent intellectual property rights. The light source adopts distributed weak feedback linewidth compression technology, which has wavelength adaptive characteristics. Under normal conditions, it can realize laser output with a linewidth as narrow as 10 Hz, and its comprehensive performance index is better than that of similar mainstream products in China and abroad.
Professor Zhu Tao, the project leader and dean of the School of Opto-Electronic Engineering, Chongqing University introduced that the laser has been used in the multi-dimensional intelligent sensing project of optical fiber and certain ultra-precision measurement project in China. For the multi-dimensional intelligent sensing technology of optical fiber owned by the team, the achievement transformation has been completed and Tarco Intelligent Sensing Technology Co., Ltd. has been established. The project is valued at RMB 56 million, including RMB 42 million for intellectual property rights and 14 RMB million for venture capital. The multi-dimensional intelligent sensing equipment of optical fiber independently developed by the team has been applied in oil and gas pipelines, special security, iron and steel smelting, aerospace and other fields, reaching the international leading level. In addition to multi-dimensional intelligent sensing of optical fiber, narrow linewidth laser can also help solve the urgent demand for high-performance narrow linewidth laser sources in space, sea and civil fields.
It is reported that from September 5 to 6, the public can log on to the WeChat official account "SCE" to make an appointment to watch the exhibition. The exhibition hall of Chongqing University is located at Booth 022, N1 Hall.
