Search scope:
排序: Display mode:
An error recognition method for power equipment defect records based on knowledge graph technology Regular Article
Hui-fang Wang, Zi-quan Liu,huifangwang@zju.edu.cn
Frontiers of Information Technology & Electronic Engineering 2019, Volume 20, Issue 11, Pages 1564-1577 doi: 10.1631/FITEE.1800260
Keywords: 错误识别;电力设备缺陷记录;知识图谱;机器学习
Afeature selection approach based on a similarity measure for software defect prediction Article
Qiao YU, Shu-juan JIANG, Rong-cun WANG, Hong-yang WANG
Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 11, Pages 1744-1753 doi: 10.1631/FITEE.1601322
Keywords: Software defect prediction Feature selection Similarity measure Feature weights Feature ranking list
The Boeing 737 Max Saga: Automating Failure
Chris Palmer
Engineering 2020, Volume 6, Issue 1, Pages 2-3 doi: 10.1016/j.eng.2019.11.002
Development Path of Offshore Drilling Equipment in China
Liu Jian
Strategic Study of CAE 2020, Volume 22, Issue 6, Pages 40-48 doi: 10.15302/J-SSCAE-2020.06.006
China has made achievements in offshore drilling equipment, and it can now develop the shallow-water drilling rigs independently. However, as far as deep-water drilling equipment is concerned, there still exists a big gap between China and the international advanced level, which inevitably hinders the deep-water oilfield development in the country. To accelerate the development of China’s offshore drilling equipment, this study first analyzes the development status of the equipment in China and abroad from three aspects: shallow-water drilling machine, deep-water drilling machine, and new-type marine drilling machine; it then summarizes the development status in China and the gap between China and the international advanced level. Subsequently, it studies the key technologies for realizing the localization of the deep-water drilling equipment, and proposes corresponding countermeasures and suggestions. We propose that China should focus its efforts on making breakthroughs in the design, materials, technology, inspection, and sea test of the deep-water drilling rigs. To clarify the development path of the offshore drilling equipment, China should establish and improve the standards and specifications regarding offshore drilling rigs; develop different types of deep-water drilling equipment at different stages and by different levels; establish an integrated testing platform and a sea test base; strengthen inter-industry cooperation; develop this sector in an innovation-driven mode; and promote diversified, serial, automated, and intelligent development.
Keywords: offshore drilling rig deep-water drilling rig development of equipment test sea test
Technology Development of Electric Traction Rail Traffic
Liu Youmei
Strategic Study of CAE 2000, Volume 2, Issue 10, Pages 51-55
Traffic plays a pivotal role in the social economy operation. Rail traffic is alwys the principal part of traffic carrying trade in China. Electric traction has become the development orientation of rail traffic traction power. This paper, proceeding from the technology advantage of electric traction rail traffic, summarizes the development trend of electric traction rail traffic abroad and the development course of that at home, and puts forward the technology prospect of developing electric traction rail traffic in China.
Keywords: electric traction rail traffic development prospect
Tu Hailing
Strategic Study of CAE 2000, Volume 2, Issue 1, Pages 7-17
The market demands to continuously reduce the feature size and increase the integrated circuits density towards the new century. For the economical and technical considerations, the major wafer sizes are shifting to 150mm and 200mm, and the mass production of 300mm diameter wafers is expected to begin in 2001 or 2002. Consequently, on one hand, the growth and manufacturing of large diameter crystals and wafers bring about a number of technological problems and on the other hand, impurities behavior, defects and surface mor-point defects and the extended defects, and their relations with crystal growth technology. New finding of metallic impurities such as copper and iron has been particularly described. The behavior of oxygen, carbon, hydrogen and nitrogen that impact material performance in multiple ways havs been also discussed. Interaction between points defects and oxygen precipitates has been treated to be of prime importance. Microroughness, hydrophilic surface state and surface chemical bonds have been investigated in current paper by novel and improved characterization techniques. Since silicon based materials as the alternative material systems have received strong growing interest, the manufacturing technologies and applications of SiGe, silicon-on-insulator (SOI) have been introduced and emphasized. Finally, the author outlooks the future scientific and engineering challenges and opportunities for silicon and silicon based materials envisioned for the sub quarter-micro and nanometer integrated circuits as we approach 21st century.
Keywords: silicon wafers epitaxial silicon wafers SiGe silicon-on-insulator (SOI) impurities behavior defects control surface quality
Intelligent Development of Intelligent Marine Equipment in China
Tang Min, Li Feng, Zeng Li, Hua Lin
Strategic Study of CAE 2019, Volume 21, Issue 6, Pages 22-26 doi: 10.15302/J-SSCAE-2019.06.004
With the deep integration of information technology and the manufacturing industry, intelligent promotion and upgrading now becomes significant for boosting the competitiveness of China's marine equipment industry and for ultimately developing China into a shipbuilding power. The current situation and intelligent development trend of the marine equipment industry in other countries are first summarized in this paper. Bottlenecks that restricts the intelligent development of China's marine equipment is then analyzed. Furthermore, the general idea, implementing approach, and top-level framework are put forward for the intelligent development of China's marine equipment. Moreover, suggestions are proposed for the development, including establishing a reasonable product structure based on demand, promoting the demonstrating and guiding role of major projects, and enhancing cooperation among different industries.
Keywords: marine equipment industry equipment intelligentization shipbuilding powerhouse
Research on concreting equipment planning of ship lift boat cab segment in Three Gorges Project
Huang Jiaquan,Ma Shaofu,Yu Yongjun
Strategic Study of CAE 2013, Volume 15, Issue 9, Pages 59-63
This paper describes the selection process on concrete construction equipment of ship lift boat cab segment in Three Gorges Project in detail, including analysis on the characteristics of concrete construction in boat cab segment, selection argumentation of construction equipment at the tender stage and system adjustment and optimization of equipment selection at the construction stage. The engineering practice effect of construction equipment indicates that the concrete pouring equipment layout plan for Three Gorges Project ship lift boat cab section effectively covers all pouring surface, meeting the warehousing strength requirements in concrete pouring peak, and the construction schedule, cost, safety, can be effectively controlled. The concreting equipments of Three Gorges Project ship lift boat cab segment have been pre-rational planned, post-system adjusted and optimizated , they play an important role in the successful end of construction of Three Gorges ship lift project, and they have high promotion and application value.
Keywords: construction equipment equipment layout concrete pouring boat cab Three Gorges Project ship lift
AC-DC Power Integration Techniques
Ma Weiming
Strategic Study of CAE 2002, Volume 4, Issue 12, Pages 53-59
A novel AC — DC machine is invented on the basis of the proposed new idea of electric power integration, wherein the stator with one set of 3-phase AC winding and another set of 12-phase DC winding, together with a rotor having a d-axis field winding and a q-axis stabilizing winding, is combined with a 12-phase bridge rectifier, an AC exciter with an excitation system, the automatic voltage regulator as well as a cooling system to form an integral whole. Simultaneous AC and DC power supplies with high quality being available, this new generator is especially suitable for self-contained electrical systems, such as those found on aircraft and ships, where good performance and compact size are essential. Mathematical models of the machine are established and calculation and measurement methods of the model parameters are proposed, providing a theoretical basis for solving the key technical problems. Low-frequency oscillations occurring in a synchronous generator-rectifier system are examined, stability criterion of the system is obtained, and technical measures are proposed to ensure system’s stable operation. With the AC voltage regulated, the DC voltage floats within an acceptable range, which can be achieved through rational machine design. Due to complete electrical separation of the AC and DC circuits and usage of the properly designed 12-phase DC winding, the AC voltage distortion caused by DC commutation and the DC voltage pulsation are greatly reduced, which considerably improves the EMC of the system. Expressions for the peak current and impact torque following a short-circuit fault at DC side or at both AC and DC sides are derived once the strong nonlinearity of the system is ingeniously handled. The principle and methods for on-line real time fault diagnosis of the diodes in the 12-phase rectifier are proposed so that the state of each diode can be easily judged according to the input/output-voltage waveforms. Based on the achievements of above research, AC - DC generators with high performance have been developed, laying the foundation for integration of self-contained electrical systems.
Keywords: electric power integration double-winding AC - DC generator 12-phase rectification simultaneous AC and DC power supply self-contained electrical system
Intelligent Manufacturing of Special Equipment Based on Intelligent Connection
Liu Sanjiang, Chen Zuzhi, Shi Kun, Li Guanghai
Strategic Study of CAE 2020, Volume 22, Issue 6, Pages 143-150 doi: 10.15302/J-SSCAE-2020.06.019
Special equipment are important for the economic and societal development of a country. Implementing intelligent manufacturing in the special equipment field could facilitate the transformation and upgrades of the special equipment manufacturing industry of China, and it is also an essential component for the China Manufacturing 2025 plan. In this article, we first analyze the characteristics and current status of special equipment in China and summarize the demand for intelligent manufacturing of special equipment. Then we propose some measures and development ideas for promoting the special equipment manufacturing industry from big to strong. We propose that the guiding ideology should be parallel development; the Industry 2.0, Industry 3.0, and Industry 4.0 should be promoted in parallel in the special equipment industry. The development of intelligent manufacturing of special equipment should focus on product traceability, intelligent quality management, and real-time monitoring of dynamic risks. Based on this, intelligent connection is introduced as a technology path for developing intelligent manufacturing of special equipment, and the concept of intelligent connection is further analyzed. Furthermore, the key tasks for future development are building an intelligent connection network of special equipment and developing intelligent applications.
Keywords: special equipment intelligent manufacturing intelligent connection parallel development
Shrinking Medical Devices Get Smarter Too
Chris Palmer
Engineering 2021, Volume 7, Issue 1, Pages 8-10 doi: 10.1016/j.eng.2020.12.004
A software defect prediction method with metric compensation based on feature selection and transfer learning Research Article
Jinfu CHEN, Xiaoli WANG, Saihua CAI, Jiaping XU, Jingyi CHEN, Haibo CHEN,caisaih@ujs.edu.cn
Frontiers of Information Technology & Electronic Engineering 2022, Volume 23, Issue 5, Pages 715-731 doi: 10.1631/FITEE.2100468
Keywords: Defect prediction Feature selection Transfer learning Metric compensation
Carbon Peak and Carbon Neutrality Path for China’s Power Industry
Shu Yinbiao, Zhang Liying, Zhang Yunzhou, Wang Yaohua, Lu Gang, Yuan Bo, Xia Peng
Strategic Study of CAE 2021, Volume 23, Issue 6, Pages 1-14 doi: 10.15302/J-SSCAE-2021.06.001
The low-carbon transformation of power sector is significant for achieving the goal of carbon peak and carbon neutrality in China. Based on the evaluation of power carbon budget, three power transformation scenarios of deep low-carbon, zero carbon, and negative carbon were built, the key boundary conditions such as power consumption demand were studied, and a path planning optimization model was established in the paper. Using the GESP-V software package for optimized analysis, the low-carbon transformation paths were determined for power structure, power carbon emissions, and power supply costs under different scenarios. The major issues that are critical for the low-carbon transformation of the power system were discussed, including coal power development, renewable energy development and utilization, diversified supply of clean energy, and electric power balance. Several suggestions were further proposed. Specifically, the top-level design should be strengthened to steadily plan the transformation pace, major low-carbon technologies should be developed to coordinate the overall technology and industrial layout, and the market mechanism with balanced interests should be improved while establishing a green finance policy system. The high-quality low-carbon transformation of China’s power sector in the medium and long term can be promoted through the coordination of policies, technologies, and mechanisms.
Keywords: carbon peak carbon neutrality power transformation path carbon budget carbon emission reduction scenario analysis power supply cost
Tang Yuejin,Li Jingdong,Duan Xianzhong,Cheng Shijie,Pan Yuan
Strategic Study of CAE 2000, Volume 2, Issue 4, Pages 1-7
In the new century, people will extensively concern themselves with environment protection and natural resource saving. Their life style will be changed rapidly. Information system will become the most important part of our society. All of these will put forward the following challenging requirements to the electric power system for high economic characteristics, high reliability, high quality, high quantity and high density of power supply. As the conventional technology used in current power system is difficult to meet these requirements, breakthroughs of revolution in electrical technology is in urgent need. Superconducting technology is one of those breakthroughs. It is commonly recognized that superconducting technology will be widely used in the electric power system in the 21st century. This paper systematically analyzes the problems facing the electrical power industry in the 21st century and the potential of using superconducting technology in the future power system. The current states of applying superconducting technology to the electric power system are also overviewed.
Keywords: applied superconductivity electric power system environment and resources
Building a New Electric Power System Based on New Energy Sources
Shu Yinbiao, Chen Guoping, He Jingbo, Zhang Fang
Strategic Study of CAE 2021, Volume 23, Issue 6, Pages 61-69 doi: 10.15302/J-SSCAE-2021.06.003
Building a new electric power system that is based on new energy sources is an important direction for power system transformation and upgrading in China, and it is critical for peaking carbon emissions and achieving carbon neutrality. In this study, we analyze the changes and challenges that are brought by power system transformation and elaborate on the connotation and building principles of a new electric power system. Moreover, we categorize the development of the new system into stages and propose development suggestions for each stage considering the technical features of the system and the new energy access scale. The new electric power system proposed in this study can satisfy the increasing demand for clean power as it primarily uses new energy sources and it has the features of high safety, openness, and adaptability. Building the new electric power system should follow the technical evolution law and characteristics of power systems; it should further exploit the potentials of mature technologies and current power systems. Meanwhile, emerging technologies should be researched and developed.
Keywords: new electric power systems carbon dioxide peaking carbon neutrality new energy sources power transformation
Title Author Date Type Operation
An error recognition method for power equipment defect records based on knowledge graph technology
Hui-fang Wang, Zi-quan Liu,huifangwang@zju.edu.cn
Journal Article
Afeature selection approach based on a similarity measure for software defect prediction
Qiao YU, Shu-juan JIANG, Rong-cun WANG, Hong-yang WANG
Journal Article
Behavior of Impurities, Defects and Surface Morphology for Silicon and Silicon Based Semiconducting Materials
Tu Hailing
Journal Article
Intelligent Development of Intelligent Marine Equipment in China
Tang Min, Li Feng, Zeng Li, Hua Lin
Journal Article
Research on concreting equipment planning of ship lift boat cab segment in Three Gorges Project
Huang Jiaquan,Ma Shaofu,Yu Yongjun
Journal Article
Intelligent Manufacturing of Special Equipment Based on Intelligent Connection
Liu Sanjiang, Chen Zuzhi, Shi Kun, Li Guanghai
Journal Article
A software defect prediction method with metric compensation based on feature selection and transfer learning
Jinfu CHEN, Xiaoli WANG, Saihua CAI, Jiaping XU, Jingyi CHEN, Haibo CHEN,caisaih@ujs.edu.cn
Journal Article
Carbon Peak and Carbon Neutrality Path for China’s Power Industry
Shu Yinbiao, Zhang Liying, Zhang Yunzhou, Wang Yaohua, Lu Gang, Yuan Bo, Xia Peng
Journal Article
A Promising Topic in the Development of Electrical Engineering in the 21st Century ——Superconducting Technology in Electric Power System
Tang Yuejin,Li Jingdong,Duan Xianzhong,Cheng Shijie,Pan Yuan
Journal Article