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Journal of Systems Science & Complexity 2023年第2期36卷 540-554页

作者： FAN Xinyu chen shujin WANG Xiaoli School of Automation Central South UniversityChangsha 410075China

This paper investigates the distributed H_(∞)consensus problem for a first-order multiagent system where both cooperative and antagonistic interactions *** the presence of external disturbances,a distributed control algorithm using local information is addressed and a sufficient condition to get the H_(∞)control gain is obtained,which make the states of the agents in the same group converge to a common point while the inputs of each agent are constrained in the nonconvex ***,a numerical simulation is exhibited to illustrate the theory.

关键词： Antagonistic interactions H_(∞)control multi-agent systems nonconvex constrained consensus problem

Application of neural networks for permanent magnet synchronous motor direct torque control

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Journal of Systems Engineering and Electronics 2008年第3期19卷 555-561页

作者： Zhang Chunmei Liu Heping chen shujin Wang Fangjun Information Engineering School Univ. of Science and Technology Beijing Beijing 100083 China Engineering Dept. Coll. of Electron Science and Technology Career Beijing 100029 China

Neural networks require a lot of training to understand the model of a plant or a process. Issues such as learning speed, stability, and weight convergence remain as areas of research and comparison of many training algorithms. The application of neural networks to control interior permanent magnet synchronous motor using direct torque control （DTC） is discussed. A neural network is used to emulate the state selector of the DTC. The neural networks used are the back-propagation and radial basis function. To reduce the training patterns and increase the execution speed of the training process, the inputs of switching table are converted to digital signals, i.e., one bit represent the flux error, one bit the torque error, and three bits the region of stator flux. Computer simulations of the motor and neural-network system using the two approaches are presented and compared. Discussions about the back-propagation and radial basis function as the most promising training techniques are presented, giving its advantages and disadvantages. The system using back-propagation and radial basis function networks controller has quick parallel speed and high torque response.

关键词： interior permanent magnet synchronous motor radial basis function neural network torque control,direct torque control.

Effect of Shoulder Diameter on the Force Generation, Microstructure and Mechanical Properties of Friction Stir-Brazed Aluminium Alloy and Copper with Ultrahigh Rotation Speed

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Acta Metallurgica Sinica(English Letters) 2020年第1期33卷 154-164页

作者： Yang Zhou shujin chen Di Wang Ruifeng Li Bin Liu Juan Pu Zhidong Yang School of Computer Science and Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China School of Material Science and Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China

Friction stir brazing with ultrahigh rotation speed was applied to 6061 aluminium alloy–pure copper lap joints with the aid of zinc *** effects of different shoulder diameters from 7 to 15 mm on the microstructure and mechanical properties of Al/Cu FSB joints were investigated along with the temperature and resistance of the friction *** oscillation of forward resistance and lateral force was related to the flow of the plastic metal and contributed to obtain a good appearance during the welding *** the appearance of the welded joints,it was obvious that the phase difference between the forward resistance and lateral force had a significant influence on the joint *** scale-like ripples appeared on the weld area when a sharp angle in the phase difference curve ***,with a lower axial force and oscillation assistance,a satisfactory joint could be *** results of the shear strength of the brazed joint showed that the shoulder with a 12 mm diameter yielded the highest shear ***,the zinc foil in the middle melted completely and formed finely dispersed CuZn5 Al–Zn eutectic structures at the Al–Cu interface.

关键词： Friction stir brazing Ultrahigh rotation speed Zn foil Forward resistance Lateral force

Microstructure and Shear Properties Evolution of Minor Fe-Doped SAC/Cu Substrate Solder Joint under Isothermal Aging

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Acta Metallurgica Sinica(English Letters) 2024年第7期37卷 1279-1290页

作者： Quanzhen Li chengming Li Xiaojing Wang Shanshan Cai Jubo Peng shujin chen Jiajun Wang Xiaohong Yuan Jiangsu University of Science and Technology Zhenjiang212003China R&D Center Yunnan Tin Group(Holding)Co.LtdKunming650000China The 58 Research Institute of China Electronics Technology Group CorporationWuxi214100China Yunnan Precious Metals Lab Sino-Platinum Metals Co.LtdKunming650156China

Different amounts of Fe(0.005,0.01,0.03,0.05,and 0.07 wt%)were added to SAC305 to study the shear behavior damage of Fe-doped SAC solder joints under thermal loading(170℃,holding time of 0,250,500,and 750 h).The results show that during isothermal aging at 170℃,the average shear force of all solder joints decreases with increasing aging time,while the average fracture energy first increases and then decreases,reaching a maximum at 500 *** Fe doping could both increase shear forces and related fracture energy,with the optimum Fe doping amount being 0.03 wt%within the entire aging *** is because the doping Fe reduces the undercooling of the SAC305 alloy,resulting in the microstructure refining of solder *** in turn causes the microstructure changing from network structure(SAC305 joint:eutectic network+β-Sn)to a single matrix structure(0.03Fe-doped SAC305 joint:β-Sn matrix+small compound particles).Specifically,Fe atoms can replace some Cu in Cu_(6)Sn_(5)(both inside the solder joint and at the interface),and then form(Cu,Fe)_(6)Sn_(5) compounds,resulting in an increase in the elastic modulus and nanohardness of the ***,the growth of Cu_(6)Sn_(5) and Cu_(3)Sn intermetallic compounds(IMC)layer are inhibited by Fe doping even after the aging time prolonging,and Fe aggregates near the interface compound to form FeSn_(2).This study is of great significance for controlling the growth of interfacial compounds,stabilizing the microstructures,and providing strengthening strategy for solder joint alloy design.

关键词： SAC305 solder Fe doping Shear mechanical behavior Isothermal aging Interfacial intermetallic compounds(IMC)

枢椎支点螺钉在寰枢椎钉棒固定中复位能力的生物力学测试

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中国组织工程研究 2025年第15期29卷 3116-3120页

作者：陈树金马向阳邹小宝廖英强漆海如刘宝曾宪明中山火炬开发区人民医院脊柱外科广东省中山市528436 中国人民解放军南部战区总医院脊柱外科广东省广州市510010

背景:目前,寰枢椎脱位的手术治疗主要采取后路寰枢椎钉棒内固定系统进行提拉复位,术中常通过增大连接棒的弯曲度进而增加寰椎和枢椎间的落差来提升复位效果,但增加了手术难度及风险。枢椎支点螺钉直接增加了寰椎和枢椎间的复位落差,但... 详细信息

背景:目前,寰枢椎脱位的手术治疗主要采取后路寰枢椎钉棒内固定系统进行提拉复位,术中常通过增大连接棒的弯曲度进而增加寰椎和枢椎间的落差来提升复位效果,但增加了手术难度及风险。枢椎支点螺钉直接增加了寰椎和枢椎间的复位落差,但其增加复位能力的程度尚不清楚。目的:测试枢椎支点螺钉的复位能力,并与普通螺钉进行对比。方法:选取6具新鲜人体颅颈标本,切除双侧侧块关节囊、寰齿关节囊及横韧带制成寰枢椎失稳模型,每具标本枢椎双侧均依次进行3种内固定:植入单轴枢椎支点螺钉(A组)、多轴枢椎支点螺钉(B组)及普通螺钉(C组),将柔性超薄式薄膜压力传感器置于寰齿前间隙,置入2根相同曲度连接棒,模拟提拉复位,获取寰齿前间隙压力,3组间进行对比分析。结果与结论:①A-C组标本寰齿前间隙压力分别为(97.59±8.58),(60.43±5.09),(22.74±0.81)N,3组间寰齿前间隙压力比较差异有显著性意义(F=251.603,P=0.000),3组间两两比较差异有显著性意义(P=0.000);②结果显示相较于普通颈椎后路螺钉,枢椎支点螺钉应用于后路寰枢椎钉棒内固定系统可提升复位能力,且单轴枢椎支点螺钉相较于多轴枢椎支点螺钉提升后路寰枢椎钉棒内固定系统的复位能力更佳。

关键词：枢椎支点螺钉寰枢椎钉棒内固定系统寰枢椎脱位复位能力生物力学

Exploring the efficacy of(R)-PFI-2 hydrochloride in mitigating noise-induced hearing loss by targeting NLRP3 inflammasome and NF-κB pathway to reduce inner ear inflammation

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Journal of Otology 2024年第4期19卷 200-206页

作者： Dawei Ren Xuemin chen Hongdong Liu Menghua Li Liting Zheng Pan Yong Mohe Huang Xi Shi Yice Xu shujin chen Yan Zhang Wei Zhu Department of Otorhinolaryngology the First Hospital of Jilin UniversityChangchun130021JilinChina Department of Otorhinolaryngology No.971 Hospital of People’s Liberation Army NavyQingdao266000Shandong ProvinceChina Senior Department of Otolaryngology-Head&Neck Surgery Chinese PLA General HospitalNational Clinical Research Center for Otolaryngologic DiseasesState Key Lab of Hearing ScienceMinistry of EducationBeijing Key Lab of Hearing Impairment Prevention and TreatmentBeijing100083China Artificial Auditory Laboratory of Jiangsu Province Xuzhou Medical UniversityXuzhou221000JiangsuChina Key Laboratory of Tropical Biological Resources of Ministry of Education School of Pharmaceutical SciencesHainan UniversityHaikou570228Hainan ProvineChina Song Li’s Academician Workstation of Hainan University School of Pharmaceutical SciencesYazhou BaySanya572000Hainan ProvineChina Department of Otolaryngology-Head and Neck Surgery The Central Hospital of XiaoganXiaogan432000HubeiChina ENT Department The People’s Hospital of Rongchang DistrictChongqing402460China

Noise-induced hearing loss(NIHL)is primarily driven by inflammatory processes within the cochlea,where noise exposure triggers the activation of the NOD-like receptor protein 3(NLRP3)inflammasome,leading to an inflammatory *** interaction between increased NLRP3 expression and NF-κB activity can further amplify cochlear *** findings reveal that(R)-PFI-2 hydrochloride,a selective inhibitor of the SETD7 enzyme,effectively inhibits the activation of the cochlear NF-κB pathway,suppresses the release of proinflammatory factors,and prevents inflammasome *** intervention disrupts the perpetuating cycle of inflammation,thereby alleviating damage to cochlear hair cells attributed to acoustic ***,(R)-PFI-2 hydrochloride emerges as a promising pharmacological candidate for NIHL,targeting and moderating the excessive immune and inflammatory responses implicated in the pathology of hearing loss.

关键词： NIHL (R)-PFI-2 hydrochloride NLRP3 NF-κB SETD7

Effect of W/Cu composite filler metals on the microstructure and mechanical properties of laser welded pure niobium/304 stainless steel joint

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China Welding 2016年第4期25卷 9-13页

作者： Shi Mingxiao Zhao Jian chen shujin Hu Qingxian Wang Weilin School of Materials Science and Engineering Jiangsu University of Science and TechnologyZhenjiang212003 School of Materials Engineering Shanghai University of Engineering ScienceShanghai201620 Engineering Technology Research Institute PetroChina Southwest Oil&Gas Field CompanyChengdu610017

Cracking in a laser weld of niobium to stainless steel occurred due to the formation of brittle,continuously distributed Nb-Fe intermetallic compounds.A crack-free joint,which had a tensile strength of 147 MPa,was obtained by using the W/Cu composite filler *** determine the reasons for cracking in the Nb/SS joint and the function of the W/Cu composite filler metals on the improvement of the cracking resistance of the Nb/W/Cu/SS joint,the microstructures of the joints were studied by optical microscopy,scanning electron microscopy and X-ray *** cracking susceptibilities of the joints were evaluated with microhardness test on the cross section of the Nb/W/Cu/SS *** results showed that the Nb/W/Cu/SS joint was characterized by various solid *** formation of solid solution reduced the cracking susceptibility of the joint.

关键词： laser welding pure niobium 304 stainless steel microstructure mechanical properties

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类脑器官在环境毒理学中的应用

环境与职业医学 2024年第3期41卷 342-347页

作者：陈书进颜崇淮上海交通大学医学院附属新华医院环境与儿童健康教育部和上海市重点实验室上海200092

自19世纪以来,模式生物的出现帮助研究人员进一步了解细胞信号通路,确定药物靶点以及进行环境毒理学的研究。外源性化学物质,如污染物、药物和工业化学品,可能会影响大脑的生物过程或其功能,并最终导致神经疾病。然而人脑是一个复杂的... 详细信息

自19世纪以来,模式生物的出现帮助研究人员进一步了解细胞信号通路,确定药物靶点以及进行环境毒理学的研究。外源性化学物质,如污染物、药物和工业化学品,可能会影响大脑的生物过程或其功能,并最终导致神经疾病。然而人脑是一个复杂的、组织严密的器官,在很多方面与模式生物有着根本的区别。由于物种的差异,动物模型可能不能完全的模拟人脑以测试环境污染物的神经毒性。由人多能干细胞诱导而来的人类脑器官在基因组、转录组以及代谢组水平更贴合人体的真实情况,提供了测试以及预测环境污染物神经毒性的有效平台,成为研究神经毒理学的新模型。本文综述了类脑器官技术的新进展及其在评估环境毒物方面的应用,以期为类脑器官在环境神经毒理学应用提供新见解。

关键词：人类脑器官环境毒理学神经毒理学

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中国传统家训教化理念、特色及其时代价值

中州学刊 2021年第2期 96-105页

作者：陈姝瑾陈延斌江苏省社会科学重点研究基地江苏师范大学中华家文化研究院徐州221116

中国传统家训(家教)的内容极为丰富,但核心始终围绕睦亲治家、教子立身、处世之道展开,教化理念的积极内蕴体现为修身观、齐家观、教子观、励志观、勉学观、处世观、为政观等,同时也不可避免地存在卑幼屈从尊长、男尊女卑、从一而终、... 详细信息

中国传统家训(家教)的内容极为丰富,但核心始终围绕睦亲治家、教子立身、处世之道展开,教化理念的积极内蕴体现为修身观、齐家观、教子观、励志观、勉学观、处世观、为政观等,同时也不可避免地存在卑幼屈从尊长、男尊女卑、从一而终、鄙视劳动等封建主义纲常礼教及因果报应、宿命论等唯心主义的糟粕。传统家训教化呈现出感化与规约的统一、“型家”与“范世”的统一、晓喻与示范的统一、内容一元与教化方式多元的统一、训诲抽象与操作具体的统一、以身立范与以言勖勉的统一、教化宗旨一贯性与阶段性渐进的统一等鲜明特色。本着承故拓新、古为今用的原则取优汰劣,扬弃传统家训教化的思想理念,能为今天齐家教子和家德建设提供丰厚滋养,借鉴传统家训教化特色中行之有效的载体与路径方法可以为提升家教质量和培塑优良家风提供有益参考。

关键词：传统家训教化理念教化特色时代价值

Stein流形的解析簇上拓广的Koppelman-Leray公式

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数学物理学报（A辑） 2020年第6期40卷 1492-1510页

作者：陈叔瑾厦门大学数学科学学院福建厦门361005

该文研究在Stein流形的解析簇上如何建立微分形式的积分公式.首先,使用不同的方法和技巧我们导出在Stein流形的两类有界域中对于复n-m(0≤m 详细信息

该文研究在Stein流形的解析簇上如何建立微分形式的积分公式.首先,使用不同的方法和技巧我们导出在Stein流形的两类有界域中对于复n-m(0≤m

关键词： Stein流形解析簇统一公式拓广微分形式积分公式