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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

Abstract: To recognize errors in the s in real time, we propose an method based on technology. According to the characteristics of s, a method for constructing a of power equipment defects is presented. Then, a graph search algorithm is employed to recognize different kinds of errors in defect records, based on the of power equipment defects. Finally, an example in terms of transformer defect records is given, by comparing the precision, recall, -score, accuracy, and efficiency of the proposed method with those of methods, and the factors influencing the effects of various methods are analyzed. Results show that the proposed method performs better in of defect records than methods, and can satisfy real-time requirements.

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

Abstract: Software defect prediction is aimed to find potential defects based on historical data and software features. Software features can reflect the characteristics of software modules. However, some of these features may be more relevant to the class (defective or non-defective), but others may be redundant or irrelevant. To fully measure the correlation between different features and the class, we present a feature selection approach based on a similarity measure (SM) for software defect prediction. First, the feature weights are updated according to the similarity of samples in different classes. Second, a feature ranking list is generated by sorting the feature weights in descending order, and all feature subsets are selected from the feature ranking list in sequence. Finally, all feature subsets are evaluated on a k-nearest neighbor (KNN) model and measured by an area under curve (AUC) metric for classification performance. The experiments are conducted on 11 National Aeronautics and Space Administration (NASA) datasets, and the results show that our approach performs better than or is comparable to the compared feature selection approaches in terms of classification performance.

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

Abstract:

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

Abstract:

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    

Behavior of Impurities, Defects and Surface Morphology for Silicon and Silicon Based Semiconducting Materials

Tu Hailing

Strategic Study of CAE 2000, Volume 2, Issue 1,   Pages 7-17

Abstract:

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

Abstract:

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

Abstract:

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

Abstract:

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

Abstract:

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

Abstract: Cross-project software solves the problem of insufficient training data for traditional , and overcomes the challenge of applying models learned from multiple different source projects to target project. At the same time, two new problems emerge: (1) too many irrelevant and redundant features in the model training process will affect the training efficiency and thus decrease the prediction accuracy of the model; (2) the distribution of metric values will vary greatly from project to project due to the development environment and other factors, resulting in lower prediction accuracy when the model achieves cross-project prediction. In the proposed method, the Pearson method is introduced to address data redundancy, and the based technique is used to address the problem of large differences in data distribution between the source project and target project. In this paper, we propose a software method with based on and . The experimental results show that the model constructed with this method achieves better results on area under the receiver operating characteristic curve (AUC) value and F1-measure metric.

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

Abstract:

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    

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

Strategic Study of CAE 2000, Volume 2, Issue 4,   Pages 1-7

Abstract:

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

Abstract:

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

The Boeing 737 Max Saga: Automating Failure

Chris Palmer

Journal Article

Development Path of Offshore Drilling Equipment in China

Liu Jian

Journal Article

Technology Development of Electric Traction Rail Traffic

Liu Youmei

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

AC-DC Power Integration Techniques

Ma Weiming

Journal Article

Intelligent Manufacturing of Special Equipment Based on Intelligent Connection

Liu Sanjiang, Chen Zuzhi, Shi Kun, Li Guanghai

Journal Article

Shrinking Medical Devices Get Smarter Too

Chris Palmer

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

Building a New Electric Power System Based on New Energy Sources

Shu Yinbiao, Chen Guoping, He Jingbo, Zhang Fang

Journal Article