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Utility and Application of a Versatile Analytical Method for MMF Calculation in AC Machines

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CES Transactions on Electrical Machines and Systems 2024年第1期8卷 22-31页

作者： ze-Zheng Wu Robert Nilssen Jian-xin Shen IEEE the College of Electrical Engineering Zhejiang UniversityHangzhou 310027China the Department of Electric Energy Norwegian University of Science and TechnologyTrondheimNorwayand also affiliated with the College of Electrical EngineeringZhejiang UniversityHangzhou 310027China

A versatile analytical method(VAM) for calculating the harmonic components of the magnetomotive force(MMF) generated by diverse armature windings in AC machines has been proposed, and the versatility of this method has been established in early literature. However, its practical applications and significance in advancing the analysis of AC machines need further elaboration. This paper aims to complement VAM by augmenting its theory, offering additional insights into its conclusions, as well as demonstrating its utility in assessing armature windings and its application of calculating torque for permanent magnet synchronous machines(PMSM). This work contributes to advancing the analysis of AC machines and underscores the potential for improved design and performance optimization.

关键词： AC machine Analytical method Harmonic analysis MMF Magnetic field Torque calculation

Research on Pulsar Time Steered Atomic Time Algorithm Based on DPLL

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Research in Astronomy and Astrophysics 2024年第3期24卷 237-248页

作者： ze-Hao Zheng Yang liu Dan Shen Fan Feng Jiu-Long liu Yue-xin Ma Xiang-Wei Zhu School of Electronic and Communication Engineering Sun Yat-sen UniversityShenzhen 518107China School of Aeronautics and Astronautics Sun Yat-sen UniversityShenzhen 518107China School of Systems Science and Engineering Sun Yat-sen UniversityGuangzhou 510275China

In today’s society,there is a wide demand for high-precision and high-stability time service in the fields of electric power,communication,transportation and *** present,the time standard in various countries is mainly based on atomic clocks,but the frequency drift of atomic clocks will affect the long-term stability *** with atomic clocks,millisecond pulsars have better long-term stability and can complement with the excellent short-term stability of atomic *** order to improve the long-term stability of the atomic timescale,and then improve the timing accuracy,this paper proposes an algorithm for steering the atomic clock ensemble(ACE)by ensemble pulsar time(EPT)based on digital phase locked loop(DPLL).First,the ACE and EPT are generated by the ALGOS algorithm,then the ACE is steered by EPT based on DPLL to calibrate the long-term frequency drift of the atomic clock,so that the generated steered atomic time follows both the short-term stability characteristics of ACE and the long-term stability characteristics of EPT,and finally,the steered atomic time is used to calibrate the local cesium *** experimental results show that the long-term stability of atomic time after steering is improved by 2 orders of magnitude compared with that before steering,and the daily drift of a local cesium clock after calibration is less than 9.47 ns in 3 yr,3 orders of magnitude higher than that before calibration on accuracy.

关键词： (stars) pulsars general-time-methods data analysis-instabilities

Microstructure and mechanical properties of Co-28Cr-6Mo-0.22C investment castings by current solution treatment

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China Foundry 2024年第4期21卷 369-378页

作者： ze-yu Dan Jun liu Jian-lei Zhang Yan-hua Li Yuan-xin Deng Yun-hu Zhang Chang-jiang Song Center for Advanced Solidification Technology School of Materials Science and EngineeringShanghai UniversityShanghai 200444China Wuxi CastPro Precision Co. Ltd.Wuxi 214105JiangsuChina

This study examined the impact of current solution treatment on the microstructure and mechanical properties of the Co-28Cr-6Mo-0.22C alloy investment *** findings reveal that the current solution treatment significantly promotes the dissolution of carbides at a lower *** optimal conditions for solution treatment are determined as a solution temperature of 1,125°C and a holding time of 5.0 *** these parameters,the size and volume fraction of precipitated phases in the investment castings are measured as6.2μm and 1.1vol.%.The yield strength,ultimate tensile strength,and total elongation of the Co-28Cr-6Mo-0.22C investment castings are 535 MPa,760 MPa,and 12.6%,*** values exceed those obtained with the conventional solution treatment at 1,200°C for 4.0 *** findings suggest a phase transformation of M_(23)C_(6)→σ+C following the current solution treatment at 1,125°C for 5.0 *** comparison,the traditional solution treatment at 1,200°C for 4.0 h leads to the formation of M_(23)C_(6)and M_(6)C *** is noteworthy that the non-thermal effect of the current during the solution treatment modifies the free energy of both the matrix and precipitation *** modification lowers the phase transition temperature of the M_(23)C_(6)→σ+C reaction,thereby facilitating the dissolution of *** a result,the current solution treatment approach achieves carbide dissolution at a lower temperature and within a significantly shorter time when compared to the traditional solution treatment methods.

关键词： CoCrMo alloy investment castings current solution treatment microstructure mechanical property carbide

Analysis of hydrogeolgical characteristics and water environmental impact pathway of typical shale gas exploration and development zones in Sichuan Basin, China

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Journal of Groundwater Science and Engineering 2019年第3期7卷 195-213页

作者： SUN Dong liu xin-ze YANG Hai-jun CAO Nan ZHANG Zhi-peng CHEN Yin-song LI Da-meng Chengdu Hydrogeology and Engineering Geology Center Sichuan Bureau of Geology and Mineral Exploration and DevelopmentChengdu 610081China Sichuan Environmental Protection Engineering and Technology Center for Groundwater Pollution Prevention and Control Chengdu 610081China Sichuan Huadi New Energy and Environmental Protection Technology Co. Ltd.Chengdu 610081China

Studying the influence of shale gas exploration and development on groundwater environment is the basis of guiding water environment protection in the process of shale gas exploration and *** environmental pollution is concealed,complex and *** it is difficult to control the pollution,the current commercial shale gas development zones in Sichuan Basin that are mostly located in karst areas and highly sensitive to groundwater will be vulnerable to the impact of shale gas exploration and *** on the hydrogeological conditions of shale gas exploration and development area and combined with engineering analysis of exploration and development,various risk pathways that may affect the groundwater environment during process of shale gas exploration,mining well construction,mining operations and other stages were identified in this *** existing risk pathways were proved by verification of typical areas and should not be *** on the actual situation of typical areas,the countermeasures of groundwater environmental protection in the process of shale gas exploration and development in karst areas were *** is believed that the groundwater environment can be better protected by strengthening administration,research and application of new technologies,precise design,hydrogeological conditions,and research and feedback of groundwater environmental protection.

关键词： Groundwater environment Shale gas Impact pathway analysis

Single-atom Rh catalysts for efficiently degrading Rhodamine B with high concentration

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Rare Metals 2024年第5期43卷 2331-2338页

作者： Shou-Yao Hu Jian-Ping Guan Run-ze Ma Yu Tao Dong-Hao liu Jia-xin Gong Yu Xiong Department of Chemistry and Chemical Engineering Central South UniversityChangsha 410083China

Highly concentrated dye wastewater has a serious effect on the quality of natural waters;thus,developing novel catalysts to degrade dyes rapidly and efficiently is of great *** the first time,this study reports an Rh single atom loaded on a nitrogen-doped carbon(SA-Rh/CN)*** catalyst exhibits an excellent processing capacity for high concentrations of Rhodamine B(Rh B),high catalytic activity(95.7% degradation of Rh B in60 min)and excellent stability(93.5% degradation efficiency after 10 stable runs).

关键词： catalyst. catalysts loaded

Recent advances in glycerol valorization through electrocatalytic methods

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Tungsten 2024年第4期6卷 696-710页

作者： Hao-Hai Dong Yu-xin Zhu Yi-Gu Li Jia-Yan Liang Ya Tan xin-Yue Zhang Hao-Min Jiang liu Lin ze-Min Sun Center for Advanced Materials Research & College of Arts and Sciences Beijing Normal University Department of Chemistry University College London

The recent tremendous growth of biodiesel production from vegetable oils or waste fats has led to increased glycerol accumulation as a by-product of this *** sparked attention towards glycerol use and valorization of this largely available and cheap *** several methods for glycerol valorization,electrochemical glycerol oxidation reaction(EGOR)is an attractive alternative anodic reaction to oxygen evolution reaction for a variety of electrolytic synthesis,due to the low thermodynamic ***,the EGOR at the anode can be coupled with a cathodic hydrogen evolution reaction to achieve efficient energy conversion in an aqueous electrolytic *** review provides a comprehensive summary and critical analysis of glycerol electrochemical oxidation research during the last 5 *** review focuses on the recent development and prospects of electrochemical pathways(indirect or direct routes) for application in the *** particular,the recent development and prospects of using noble and non-noble group metal catalysts for glycerol electro-oxidation are ***,reaction product selectivity analysis and conversion efficiency are also highlighted.

关键词： Active oxygen species Electrocatalytic methods Glycerol Noble metal catalysts Non-noble metal catalysts

粗针穿刺活检在甲状腺结节恶性风险评估中的应用进展

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中国疗养医学 2024年第3期33卷 49-54页

作者：刘馨泽应英边梦雪陈向东范茂丹吴震中周磊黄骏咏空军杭州特勤疗养中心疗养三区浙江杭州310002

甲状腺超声检查因其具有无创、高效、经济等优势,已成为甲状腺结节的首选检查方法。甲状腺结节检出后的核心问题是评估结节性质,甄别恶性高风险结节。超声引导下对甲状腺结节进行穿刺活检取材,结合细胞学病理检查结果是目前判断甲状腺... 详细信息

甲状腺超声检查因其具有无创、高效、经济等优势,已成为甲状腺结节的首选检查方法。甲状腺结节检出后的核心问题是评估结节性质,甄别恶性高风险结节。超声引导下对甲状腺结节进行穿刺活检取材,结合细胞学病理检查结果是目前判断甲状腺结节性质的首选方法,是实现甲状腺结节全程管理的重要途径。目前细针穿刺活检在甲状腺结节的诊断中应用广泛,由于细针穿刺取材有限的缺点,限制了诊断效能。粗针穿刺活检可以获得更多的组织学信息,比细针穿刺单纯依靠细胞学诊断更具优势,已被提出作为术前诊断甲状腺结节的补充方法甚至是替代方法。本文通过查阅文献,总结粗针穿刺活检在甲状腺结节恶性风险评估中的基本概况、适应证、组织学病理报告系统、并发症等做一综述,以期为甲状腺结节检出后穿刺方式的选择提供参考依据。

关键词：超声检查甲状腺结节粗针穿刺活检细针穿刺活检

Small nucleolar RNA and its potential role in the oncogenesis and development of colorectal cancer

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World Journal of Gastroenterology 2024年第2期30卷 115-127页

作者： Yang-Zheng Lan Zheng Wu Wen-Jia Chen ze-Xuan Fang xin-Ning Yu Hua-Tao Wu Jing liu The Breast Center Cancer Hospital of Shantou University Medical CollegeShantou 515041Guangdong ProvinceChina Department of General Surgery The First Affiliated Hospital of Shantou University Medical CollegeShantou 515041Guangdong ProvinceChina

Small nucleolar RNAs(snoRNAs)represent a class of non-coding RNAs that play pivotal roles in post-transcriptional RNA processing and modification,thereby contributing significantly to the maintenance of cellular functions related to protein *** have been discovered to possess the ability to influence cell fate and alter disease progression,holding immense potential in controlling human *** is suggested that the dysregulation of snoRNAs in cancer exhibits differential expression across various cancer types,stages,metastasis,treatment response and/or prognosis in *** the other hand,colorectal cancer(CRC),a prevalent malignancy of the digestive system,is characterized by high incidence and mortality rates,ranking as the third most common cancer *** research indicates that snoRNA dysregulation is associated with CRC,as snoRNA expression significantly differs between normal and cancerous ***,assessing snoRNA expression level and function holds promise for the prognosis and diagnosis of ***,current comprehension of the potential roles of snoRNAs in CRC remains *** review offers a comprehensive survey of the aberrant regulation of snoRNAs in CRC,providing valuable insights into the discovery of novel biomarkers,therapeutic targets,and potential tools for the diagnosis and treatment of CRC and furnishing critical cues for advancing research into CRC and the judicious selection of therapeutic targets.

关键词： Small nucleolar RNAs Colorectal cancer Dysregulation Biomarker

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论开放的构成要件理论的司法适用

河南大学学报（社会科学版） 2016年第1期56卷 84-91页

作者：刘泽鑫中国政法大学刑事司法学院北京100088

开放的构成要件因欠缺违法的推定机能,并且其范围不易被确定,而被大多数学者所诟病。然而,不应全盘否定开放的构成要件理论的价值,因为在司法过程中合理运用开放的构成要件理论,可以使法官充分发挥自由裁量权,甚至在一定程度上遏制"两高... 详细信息

开放的构成要件因欠缺违法的推定机能,并且其范围不易被确定,而被大多数学者所诟病。然而,不应全盘否定开放的构成要件理论的价值,因为在司法过程中合理运用开放的构成要件理论,可以使法官充分发挥自由裁量权,甚至在一定程度上遏制"两高"颁布司法解释的数量,对维护罪刑法定原则有着积极的促进作用。应将开放的构成要件视作"在构成要件之内的违法性补充要素",而非"在构成要件之外积极寻找其他违法性要素",唯此才可解决该理论在我国司法中的适用问题。在此基础上,应借用类型思维的方法来确定开放的构成要件的范围,以此在刑事司法中确立非典型指导案例体系。

关键词：开放的构成要件类型化犯罪类型非典型指导案例