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Exploring the nonlinear piezoresistive effect of 4HSiC and developing MEMS pressure sensors for extreme environments

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Microsystems & Nanoengineering 2023年第2期9卷 59-76页

作者： Chen wu Xudong Fang Qiang Kang Ziyan Fang junxia wu Hongtao He Dong Zhang Libo Zha Bian Tian Ryutaro Maedai Zhuangde Jjang State Key Laboratory for Manufacturing Systems Engineering International Joint Laboratory for Micro/Nano Manufacturing and Measurement TechnologiesXian Jiaotong UniversityXian 710049China School of Mechanical Engineering Xian Jiaotong UniversityXi'an 710049China Shandong Laboratory of Yantai Advanced Materials and Green Manufacturing Yantai 265503China Xi'an Jiaotong University(Yantai)Research Institute for Intelligent Sensing Technology and System Xi'an Jiaotong UniversityXianChina HeBei Semiconductor Research Institute Shjiazhuang 050051China

Microelectromechanical system(MEMS)pressure sensors based on silicon are widely used and offer the benefits of miniaturization and high ***,they cannot easily withstand high temperatures exceeding 150 ℃ because of intrinsic material ***,we proposed and executed a systematic and full-process study of Sic-based MEMS pressure sensors that operate stably from-50 to 300 ℃.First,to explore the nonlinear piezoresistive effect,the temperature coefficient of resistance(TCR)values of 4H-SiC piezoresistors were obtained from-50 to 500 ℃.A conductivity variation model based on scattering theory was established to reveal the nonlinear variation ***,a piezoresistive pressure sensor based on 4H-SiC was designed and *** sensor shows good output sensitivity(3.38 mVN/MPa),accuracy(0.56%FS)and low temperature coefficient of sensitivity(TCS)(-0.067%FS/℃)in the range of-50 to 300 ℃.In addition,the survivability of the sensor chip in extreme environments was demonstrated by its anti-corrosion capability in H_(2)SO_(4) and NaOH solutions and its radiation tolerance under 5 W ***,the sensor developed in this work has high potential to measure pressure in high-temperature and extreme environments such as are faced in geothermal energy extraction,deep well dilling,aeroengines and gas turbines.

关键词： environments extreme nonlinear

Longitudinal and Transverse Measurement to Evaluate the Beam Impedance on a Ceramic Ring-loaded Thin-wall Vacuum Chamber in BRing at HIAF

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IMP & HIRFL Annual Report 2019年第1期 317-319页

作者： Zhu Guangyu wu junxia Zhang Yong Du Ze 不详

A novel thin-wall vacum chamber supported by ceramic rings was discussed and evaluated for the HIAF at the IMP to reduce the cost of manufacture process,reduce the processing difficulty,shorten the production cycle,an... 详细信息

关键词： beam impedance ceramic

Upgrade of HIRFL Vacuum Monitoring System Based on EPICS Architecture

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IMP & HIRFL Annual Report 2022年第1期 309-310页

作者： Zhang Jianchuan Zeng Piaopiao Li Lili wu junxia 不详

The former vacuum monitoring system is designed based on single chip microcontroller and the user interface is written in Java *** vacuum monitoring system is used to collect the real-time vacuum value of vacuum gauges and fast-closing valve state distributed in SFC,SSC,experimental terminals and other areas of HIRFL to reect the real-time vacuum *** microcontroller-based vacuum monitoring system has been on service for more than 15 years.

关键词： vacuum EPICS system

网络文学盗版案件刑事诉讼中的代位求偿制度研究

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出版发行研究 2022年第4期 58-64页

作者：吴君霞南京森林警察学院

在打击网络文学盗版犯罪的司法实践中,一个突出问题是大量著作权人身份不明,使其难以得到合理赔偿。代位求偿制度可以使诉讼缺位著作权人的合法权益得到较好保障。网络文学盗版案件刑事诉讼代位求偿权的性质是法律特别拟制的债权关系。... 详细信息

在打击网络文学盗版犯罪的司法实践中,一个突出问题是大量著作权人身份不明,使其难以得到合理赔偿。代位求偿制度可以使诉讼缺位著作权人的合法权益得到较好保障。网络文学盗版案件刑事诉讼代位求偿权的性质是法律特别拟制的债权关系。构建代位求偿权要妥当处理好以下几个问题:代位求偿制度的适用范围、代位求偿人的权利范围;代位求偿人参与诉讼的时间、代位求偿人与著作权人的利益安排、著作权人向代位求偿人主张权利的时效、超过时效无人领取的赔偿金的处置等。

关键词：网络文学盗版著作权代位求偿

A new multi-turn beam dump scheme design and simulation for HIAF-BRing machine protection

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Radiation Detection Technology and Methods 2022年第4期6卷 530-539页

作者： Ren Hang Yang Jiancheng Shen Guodong Wang Geng Yao Liping Ruan Shuang Sheng Lina wu junxia Zhao He Liu Jie Cai Fucheng Gao Yunzhe Chang Mingxuan Li Minxiang Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China University of Chinese Academy of Sciences Beijing 100049China Huizhou Research Center of Ion sciences Huizhou 516003China Lanzhou University Lanzhou 730000China

Purpose To protect accelerator devices from being damaged by high-power beam,a new beam dump system is under design for *** Based on the optical characteristics,unwanted particles are safely deﬂected to a speciﬁc internal absorber through a local bump orbit generated by active-discharging magnets,which is achieved by paralleling a bleeder resistor of 600 m�to two of dipole magnet power *** Taking alignment and multipoleﬁeld errors into account,discarded beam can be dumped within 5 ms with an efﬁciency of more than 99.8%at any operation *** The proposed beam dump solution satisﬁes the machine protection requirements for BRing and can provide a new idea for similar facilities.

关键词： HIAF Beam dump Beam losses Machine protection

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涉野生动物犯罪案件“证据链断裂”问题研究

法律适用 2023年第3期2023卷 86-93页

作者：吴君霞南京森林警察学院

新型冠状病毒感染肺炎疫情(以下简称“新冠疫情”)在全球暴发,使涉野生动物犯罪的惩治再次受到社会的广泛关注,但野生动物及其制品难以查获所导致的“证据链断裂”问题,严重影响打击此类犯罪的有效性。涉野生动物犯罪案件证明中出现的... 详细信息

新型冠状病毒感染肺炎疫情(以下简称“新冠疫情”)在全球暴发,使涉野生动物犯罪的惩治再次受到社会的广泛关注,但野生动物及其制品难以查获所导致的“证据链断裂”问题,严重影响打击此类犯罪的有效性。涉野生动物犯罪案件证明中出现的“证据链断裂”难题,与该类案件中僵化运用印证证明等有关。解决此问题,既要确立“排除合理怀疑”在证明标准中的应然地位,也要根据案件类型区别把握对证据链条完整性的要求。同时,应强化证据生成过程的可视化,引入情态证据,丰富司法判断的证据基础。

关键词：涉野生动物犯罪印证证明证据链断裂情态证据

Design Progress of HIAF State Monitoring and Slow Protection System

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IMP & HIRFL Annual Report 2019年第1期 316-317页

作者： Zhang Jianchuan Li Guihua wu junxia Li Zhixue Zhou Detai Wang Yanyu 不详

High Intensity Heavy-ion Accelerator Facility(HIAF)is a very complex and huge system which is under construction by the Institute of Modern Physics in *** order to realize the safe and reliable operation of this facil... 详细信息

关键词： system Intensity complex

Study on the longitudinal capture efficiency of a CW heavy-ion Linac

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Radiation Detection Technology and Methods 2022年第3期6卷 391-400页

作者： Qiyu Kong Xuejun Yin Zhongshan Li Peng Jin Heng Du Xiaoni Li Zheng Liu Youjin Yuan Jiawen Xia Jiancheng Yang Weiqing Yang Zhe Xu junxia wu Yong Zhang Long Jing Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China University of Chinese Academy of Sciences Beijing 100049China Huizhou Research Center of Ion Science Huizhou 516003China Lanzhou University Lanzhou 730000China

Purpose The continuous-wave(CW)linear accelerator,SSC-Linac,has been put into operation successfully as the new injector of Separate Sector Cyclotron(SSC)for Heavy Ion Research Facility in Lanzhou(HIRFL).The SSC-Linac is operated at the frequency of 53.667 MHz,which is the four times of the SSC operating *** order to improve the longitudinal capture efﬁciency and increase the beam current extracted from the SSC,an independent multi-harmonics buncher(MHB)operating at a fundamental frequency of 13.417 MHz had been designed and *** This buncher adopts the dual-gap structure and sawtooth waveform is generated by multi-harmonics synthetized *** dynamics simulation with MHB was carried out and discussed in this ***,the beam commissioning using 84Kr14+had been performed on *** and conclusion The measured maximum capture efﬁciency 86.5%was obtained,which was well agreed with the simulation *** to the successful commissioning of MHB and the outstanding-performance of SSC-Linac,the extracted beam current from SSC has been improved one order of magnitude higher than before.

关键词： Heavy ion Linear accelerator Multi-harmonics buncher Capture efﬁciency

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指导性案例适用方法研究

四川大学学报（哲学社会科学版） 2016年第2期 144-151页

作者：吴君霞秦宗文南京大学法学院南京森林警察学院

指导性案例适用方法的定位失准是造成制度预期与实际效果形成落差的重要原因之一,判例法的经验可为我们提供有益的参考。当前指导性案例的适用方法与传统司法办案方法有高度继承性,但不符合案例指导的本质特征。指导性案例适用方法的革... 详细信息

指导性案例适用方法的定位失准是造成制度预期与实际效果形成落差的重要原因之一,判例法的经验可为我们提供有益的参考。当前指导性案例的适用方法与传统司法办案方法有高度继承性,但不符合案例指导的本质特征。指导性案例适用方法的革新应重点从三方面推进:要旨法条化与案件事实细化间的配合,为准确把握案例提供前提;肯定类推作为适用指导性案例的基础方法,正确把握和适用类推的度;发展区别技术,防止对"目的论"的滥用。

关键词：案例指导制度指导性案例判例判例法