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Three-dimensional electromagnetic analysis and design of permanent magnet retarder

Lezhi YE, Desheng LI, Bingfeng JIAO

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 4,   Pages 438-441 doi: 10.1007/s11465-010-0111-0

Abstract: An eddy current retarder for vehicles generates much heat when it works continuously, which leads to serious decline in braking torque. This paper proposes a novel permanent magnet retarder (PMR) for vehicles, whose cooling system connects with engine cooling-water. A three-dimensional finite element model is developed to model the electromagnetic behavior of a permanent magnet retarder under a constant speed. The magnetic field and eddy current field in PMR are numerically solved by a finite element method. By accounting for the nonlinear permeability of the rotor and the weakened effect in the magnetic field that is generated by the eddy current magnetic field, the calculation accuracy of air-gap magnetic field is enhanced. Experiment shows that the temperature of the retarder is less than 150°C, and the braking torque keeps the hard characteristics curve. The calculated air-gap magnetic flux density is fairly good agreement with the measured one.

Keywords： auxiliary brake     permanent magnet retarder     water-cooling     finite element method    

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Real-time monitoring of brake shoe keys in freight cars

Rong ZOU,Zhen-ying XU,Jin-yang LI,Fu-qiang ZHOU

Frontiers of Information Technology & Electronic Engineering 2015, Volume 16, Issue 3,   Pages 191-204 doi: 10.1631/FITEE.1400305

Abstract: The brake shoe key (BSK) is an important component in the brake system, and its absence will lead to

Keywords： Condition monitoring     Feature expression     Brake shoe key     Machine vision    

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Wear mechanism of disc-brake block material for new type of drilling rig

WANG Xinhua, WANG Simin, ZHANG Siwei, WANG Deguo

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 1,   Pages 10-16 doi: 10.1007/s11465-008-0009-2

Abstract: To improve friction and wear performance and service life of the disc-brake pair material of a drillingrig, a new type of asbestos-free frictional material with better performance for disc-brake blocks isTopography and elementary components of the brake block’s wear surface are analyzed by employing SEMWhen the frictional temperature is lower, the surface film of the brake block is thinner, dense, smoothof the brake block.

Keywords： asbestos-free frictional     Fracture     cyclization     friction     disc-brake    

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Strategic Study on the Development of Advanced Semiconductor Materials and Auxiliary Materials in China

Writing Group of Advanced Semiconductor Materials and Auxiliary Materials

Strategic Study of CAE 2020, Volume 22, Issue 5,   Pages 10-19 doi: 10.15302/J-SSCAE-2020.05.002

Abstract: strategic opportunity to realize the independent control over its advanced semiconductor materials and auxiliaryIn this paper, we analyze the development status of semiconductor materials and auxiliary materials inTo promote the development of advanced semiconductor materials and auxiliary materials in China, we suggestintegrated circuit; a platform that provides integrated tests for SiC and GaN semiconductor materials, auxiliary

Keywords： advanced semiconductor materials     auxiliary materials     third-generation semiconductor     2035    

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Transient analysis of thermoelastic contact problem of disk brakes

Ali BELHOCINE, Mostefa BOUCHETARA

Frontiers of Mechanical Engineering 2013, Volume 8, Issue 2,   Pages 150-159 doi: 10.1007/s11465-013-0266-6

Abstract: main purpose of this study is to analyze the thermomechanical behavior of the dry contact between the brake

Keywords： brake disks     heat flux     heat-transfer coefficient     Von Mises stress     contact pressure    

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A new auxiliary information based cumulative sum median control chart for location monitoring Regular Papers

Shahid HUSSAIN, Li-xin SONG, Shabbir AHMAD, Muhammad RIAZ

Frontiers of Information Technology & Electronic Engineering 2019, Volume 20, Issue 4,   Pages 554-570 doi: 10.1631/FITEE.1700428

Abstract: In this paper we propose several CUSUM median control charts based on auxiliary variables, and offer

Keywords： Average run length     Auxiliary information     CUSUM control charts     Location parameter     Median control charts    

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Auxiliary diagnostic system for ADHD in children based on AI technology Research

Yanyi Zhang, Ming Kong, Tianqi Zhao, Wenchen Hong, Di Xie, Chunmao Wang, Rongwang Yang, Rong Li, Qiang Zhu,doczyy1981@sina.com,zjukongming@zju.edu.cn,zhuq@zju.edu.cn

Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 3,   Pages 400-414 doi: 10.1631/FITEE.1900729

Abstract: Traditional diagnosis of in children is primarily through a questionnaire filled out by parents/teachers and clinical observations by doctors. It is inefficient and heavily depends on the doctor’s level of experience. In this paper, we integrate artificial intelligence (AI) technology into a software-hardware coordinated system to make ADHD diagnosis more efficient. Together with the intelligent analysis module, the camera group will collect the eye focus, facial expression, 3D body posture, and other children’s information during the completion of the functional test. Then, a multi-modal model is proposed to classify abnormal behavior fragments of children from the captured videos. In combination with other system modules, standardized diagnostic reports can be automatically generated, including test results, abnormal behavior analysis, diagnostic aid conclusions, and treatment recommendations. This system has participated in clinical diagnosis in Department of Psychology, The Children’s Hospital, Zhejiang University School of Medicine, and has been accepted and praised by doctors and patients.

Keywords： Attention deficit hyperactivity disorder (ADHD)     Auxiliary diagnosis     Computer vision     Deep learning    

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Impact of oxygen enriched combustion on the performance of a single cylinder diesel engine

K. RAJKUMAR, P. GOVINDARAJAN

Frontiers in Energy 2011, Volume 5, Issue 4,   Pages 398-403 doi: 10.1007/s11708-011-0157-7

Abstract: conducted in the above said engine for different loads and the following performance characteristics like brakepower (BP), specific fuel consumption (SFC), mean effective pressure, brake thermal efficiency, mechanical

Keywords： oxygen enriched combustion     exhaust gas temperature     brake power (BP)     specific fuel consumption (SFC)    

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Availability growth models and verification of power equipment

Jinyuan SHI, Jiamin XU

Frontiers in Energy 2021, Volume 15, Issue 2,   Pages 529-538 doi: 10.1007/s11708-019-0624-0

Abstract: The general availability growth models for large scale complicated repairable system such as electric generating units, power station auxiliaries, and transmission and distribution installations are presented. The calculation formulas for the maintenance coefficient, mathematical expressions for general availability growth models, ways for estimating, and fitting on checking the parameters of the model are introduced. Availability growth models for electric generating units, power station auxiliaries, and transmission and distribution installations are given together with verification examples for availability growth models of 320–1000 MW nuclear power units and 1000 MW thermal power units, 200–1000 MW power station auxiliaries, and 220–500 kV transmission and distribution installations. The verification results for operation availability data show that the maintenance coefficients for electric generating units, power station auxiliaries, transmission and distribution installations conform to the power function, and general availability growth models conform to rules of availability growth tendency of power equipment.

Keywords： repairable system     power equipment     electric generating unit     power station auxiliary     transmission and distribution    

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Performance, emission and combustion characteristics of CI engine fuelled with diesel and hydrogen

R. Senthil KUMAR,M. LOGANATHAN,E. James GUNASEKARAN

Frontiers in Energy 2015, Volume 9, Issue 4,   Pages 486-494 doi: 10.1007/s11708-015-0368-4

Abstract: The brake thermal efficiency (BTE) was increased and brake specific fuel consumption (BSFC) decreased

Keywords： hydrogen     brake thermal efficiency     crank angle     compressed ignition (CI)    

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Status of worldwide SOFC stacks and systems development

Subhash C Singhal

Strategic Study of CAE 2013, Volume 15, Issue 2,   Pages 7-14

Abstract:

Many companies worldwide are pursuing the development, manufacturing and commercialization of the solid oxide fuel cell (SOFC) technology for power generation for a variety of applications. This paper reviews and discusses the status of such development.

Keywords： solid oxide fuel cell (SOFC)     SOFC stack     tubular cell     combined heat and power (CHP)     auxiliary power    

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Cohort study of patients with Stevens–Johnson syndrome and toxic epidermal necrolysis in China: evaluation of risk models and new predictor of pulmonary consolidation on computed tomography

Yanhong Shou, Lu Yang, Yongsheng Yang, Xiaohua Zhu, Feng Li, Bo Yin, Yingyan Zheng, Jinhua Xu

Frontiers of Medicine 2021, Volume 15, Issue 4,   Pages 585-593 doi: 10.1007/s11684-020-0817-2

Abstract: discrimination (area under the receiver operating characteristic curve (AUC), 0.78), and it was superior to auxiliary

Keywords： Stevens–Johnson syndrome     toxic epidermal necrolysis     auxiliary score     ABCD-10     pulmonary consolidation    

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“Medical-and-Care Wisdom Linkage” Pension Model Research and Exploration

Jin Xinyu,Xia Qi,Zhang Wei and Li Lanjuan

Strategic Study of CAE 2018, Volume 20, Issue 2,   Pages 92-98 doi: 10.15302/J-SSCAE-2018.02.014

Abstract:

China has become an aging society faced with difficult challenges. However, the country’s endowment system is still in the infant stage, and the pension problem has become one of the major problems that need to be solved promptly. Based on China's national policies, this paper proposes a "Medical-and-Care Wisdom Linkage" pension system with a large hospital for diagnosis and treatment as the centerpiece. This system can connect institutional pension models, community pension models, and family pension models by means of the Internet. At the same time, the system uses new cloud-based artificial intelligence for diagnosis and rehabilitation. Related practice has proven that using the Internet, advanced artificial intelligence, and other effective comprehensive treatment technologies to solve the current problems of China?s pension industry has important research value. These are also very promising efforts that are in line with national development strategies and relevant policies.

Keywords： “Medical-and-Care Wisdom Linkage”     wisdom endowment     Internet     artificial intelligence     auxiliary diagnosis    

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Title Author Date Type Operation

Three-dimensional electromagnetic analysis and design of permanent magnet retarder

Lezhi YE, Desheng LI, Bingfeng JIAO

Journal Article

Real-time monitoring of brake shoe keys in freight cars

Rong ZOU,Zhen-ying XU,Jin-yang LI,Fu-qiang ZHOU

Journal Article

Wear mechanism of disc-brake block material for new type of drilling rig

WANG Xinhua, WANG Simin, ZHANG Siwei, WANG Deguo

Journal Article

Strategic Study on the Development of Advanced Semiconductor Materials and Auxiliary Materials in China

Writing Group of Advanced Semiconductor Materials and Auxiliary Materials

Journal Article

Transient analysis of thermoelastic contact problem of disk brakes

Ali BELHOCINE, Mostefa BOUCHETARA

Journal Article

A new auxiliary information based cumulative sum median control chart for location monitoring

Shahid HUSSAIN, Li-xin SONG, Shabbir AHMAD, Muhammad RIAZ

Journal Article

Auxiliary diagnostic system for ADHD in children based on AI technology

Yanyi Zhang, Ming Kong, Tianqi Zhao, Wenchen Hong, Di Xie, Chunmao Wang, Rongwang Yang, Rong Li, Qiang Zhu,doczyy1981@sina.com,zjukongming@zju.edu.cn,zhuq@zju.edu.cn

Journal Article

Impact of oxygen enriched combustion on the performance of a single cylinder diesel engine

K. RAJKUMAR, P. GOVINDARAJAN

Journal Article

Availability growth models and verification of power equipment

Jinyuan SHI, Jiamin XU

Journal Article

Performance, emission and combustion characteristics of CI engine fuelled with diesel and hydrogen

R. Senthil KUMAR,M. LOGANATHAN,E. James GUNASEKARAN

Journal Article

Status of worldwide SOFC stacks and systems development

Subhash C Singhal

Journal Article

Cohort study of patients with Stevens–Johnson syndrome and toxic epidermal necrolysis in China: evaluation of risk models and new predictor of pulmonary consolidation on computed tomography

Yanhong Shou, Lu Yang, Yongsheng Yang, Xiaohua Zhu, Feng Li, Bo Yin, Yingyan Zheng, Jinhua Xu

Journal Article

“Medical-and-Care Wisdom Linkage” Pension Model Research and Exploration

Jin Xinyu,Xia Qi,Zhang Wei and Li Lanjuan

Journal Article