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Charging Properties and Particle Dynamics of Chang’e-5 Lunar Sample in an External Electric Field

Engineering 2024年第11期42卷 267-277页

作者： Junping Gu Xiaoyu Qian Yiwei Liu Qinggong Wang Yiyang Zhang Xuan ruan Xiangjin Deng Yaowen Lu jian Song Hui Zhang Yunning Dong Mengmeng Wei Wei Yao Shuiqing Li Weihua Wang Zhigang Zou Mengfei Yang Qian Xuesen Laboratory of Space Technology China Academy of Space TechnologyBeijing 100094China Key Laboratory for Thermal Science and Power Engineering of Ministry of Education Department of Energy and Power EngineeringTsinghua UniversityBeijing 100084China Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of Education Institute of Nuclear and New Energy TechnologyTsinghua UniversityBeijing 100084China Beijing Institute of Spacecraft System Engineering Beijing 100094China Beijing Orient Institute of Measurement and Test Beijing 100086China Institute of Physics Chinese Academy of SciencesBeijing 100190China College of Engineering and Applied Sciences Nanjing UniversityNanjing 210093China China Academy of Space Technology Beijing 100094China

Facing the challenges of in-situ utilization of lunar regolith resources,applying an external electric field to manipulate lunar particles has become a promising method for space particle control,which mainly depends on the particle charging properties in the applied electric *** the surficial lunar regolith samples brought back from the Moon by the Chang’e-5 mission(CE5 LS),this work successively studied their charging properties,particle dynamics,and their collision damages to aerospace materials under the action of an external electric field in high-vacuum *** results indicated that the charging pro-cess and electrostatic projection of lunar regolith particles under high-vacuum conditions were different from those under atmosphere *** particle diameter range of CE5 LS used in the experiment is 27.7-139.0 *** electric field strength of 3-12 kV·cm^(-1),the charge obtained by CE5 LS is 4.8×10^(-15)-4.7×10^(-13) C and the charge-to-mass ratio is 1.2×10^(-5)-6.8×10^(-4) C·kg^(-1).The CE5 LS is easier to be negatively charged in an external electric ***,significant damages were observed on the target impact surfaces,indicating severe influences of lunar regolith particles on aerospace *** work contributes to a more comprehensive understanding of physical mechanisms controlling the lunar regolith shielding and utilization,and will inspire broad efforts to develop the lunar in-situ engi-neering solutions.

关键词： Chang’e-5 lunar regolith sample Charging properties External electric field Particle dynamics Particle collision

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电液疲劳试验系统的变谐振控制技术研究

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振动与冲击 2016年第7期35卷 10-14,30页

作者：贾文昂阮健浙江工业大学机械制造及自动化教育部重点实验室杭州310014

随着激振频率的增加,电液疲劳试验机激振输出幅值急剧衰减,激振频率和激振输出幅值两者之间存在相互矛盾的关系,因此提出了利用谐振能量提高激振输出幅值的方案。该方案通过改变阀控单出杆液压缸无杆腔容积的方法改变系统的谐振频率,使... 详细信息

随着激振频率的增加,电液疲劳试验机激振输出幅值急剧衰减,激振频率和激振输出幅值两者之间存在相互矛盾的关系,因此提出了利用谐振能量提高激振输出幅值的方案。该方案通过改变阀控单出杆液压缸无杆腔容积的方法改变系统的谐振频率,使得谐振频率与激振频率重合,在谐振点进行激振。在对液压动力机构的运动过程进行分析的基础上,建立系统的数学模型,运用四阶龙格库塔的数值算法对其求解,并对仿真结果进行理论分析,分析结果表明可通过改变无杆腔容积来改变系统的谐振频率,且在谐振点处的激振输出幅值有较大幅度的提升;从负载流量曲线上看,由于谐振能量的输出使得在谐振点处的负载流量急剧降低。随后建立实验系统对以上仿真结果进行实验研究。实验结果表明:在谐振点处的激振输出幅值为饱和输出幅值的25%左右,负载流量则减小了90%左右;通过改变无杆腔的容积能有效改变谐振频率,拓宽电液疲劳试验机应用范围。

关键词：电液疲劳谐振频率 2D激振阀变谐振

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汽车制动盘材料检测要点

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铸造 2023年第11期72卷 1441-1446页

作者：阮建刚上汽大众汽车有限公司上海201805

汽车制动盘在化学成分上具有高碳特点,在结构上具有盘式特征。本文论述了对制动盘化学成分、硬度、金相组织、楔压强度进行检测时的要点,避免检测结果出现误差甚至错误,提高测量精度、避免争议。

关键词：制动盘化学成分硬度金相组织楔压强度

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国内市场竞争、全要素生产率与国际贸易

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科研管理 2020年第6期41卷 109-118页

作者：阮敏简泽江西财经大学经济学院江西南昌330013 广东财经大学工商管理学院广东广州528100

与其它经济体比较起来,中国制造业企业表现出更高的出口参与率。现有研究认为,贸易成本的下降是导致中国制造业企业呈现高出口倾向的主要原因。与这个视角不同,本文从国内市场竞争环境的变化出发,考察了国内市场竞争对中国制造业企业出... 详细信息

与其它经济体比较起来,中国制造业企业表现出更高的出口参与率。现有研究认为,贸易成本的下降是导致中国制造业企业呈现高出口倾向的主要原因。与这个视角不同,本文从国内市场竞争环境的变化出发,考察了国内市场竞争对中国制造业企业出口倾向的影响。在这个新的视角下,我们得到了以下结果:(1)国内市场的竞争程度与企业层面的出口倾向正相关,因而,激烈的国内市场竞争推动了企业出口;(2)在经济机制上,国内市场竞争推动了企业层面全要素生产率的增长,进而通过出口竞争力的提升推动了企业出口;(3)国内市场竞争不仅在扩展边际上推动了更多的企业出口,而且在集约边际上促进了企业出口强度的提高。这些结果表明,激烈的国内市场竞争增进了中国制造业企业在国外市场上的出口竞争力。因此,我们促进出口的政策应该更多地转向以培育竞争性市场为中心的微观经济政策。

关键词：国内市场竞争全要素生产率出口倾向

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Verification on the Developmental Toxicity of Short-term Exposure to Phenol in Rats

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Biomedical and Environmental Sciences 2020年第6期33卷 403-413页

作者： WANG Chao XU Yong Jun SHI Ying WANG Chong DUAN Lian GU Wen ruan Hong Jie ZHANG Shao Ping ZHI Hong KONG jian ZHANG Li Xia ZHANG Ming ZHANG Hong Wei China CDC Key Laboratory of Environment and Population Health National Institute of Environmental HealthChinese Center for Disease Control and PreventionBeijing 100021China

Objective To verify the health advisory for short-term exposure to *** The method of this validation experiment was the same as the US Environmental Protection Agency(EPA)methodology for toxicology experiments used to determine phenol drinking water equivalent level(DWEL).Pregnant female Sprague-Dawley rats were administered phenol in distilled water by gavage at daily doses of 15,30,60,120,and 240 mg/kg body weight(b.w.)from implantation(the 6 th day post-mating)to the day prior to the scheduled caesarean section(the 20th day of pregnancy).The following information was recorded:general behavior;body weight;number of corpus luteum,live birth,fetus,stillbirth,and implantation;fetal gender;body weight;body length;tail length;and abnormalities and pathomorphological changes in the *** In the 60 mg/kg *** group,the mortality of pregnant rats increased with increasing doses,suggesting maternal *** and placental weights decreased as phenol dose increased from30 mg/kg b.w.,and were significantly different compared those in the vehicle control group,which suggested developmental toxicity in the ***,the phenol-exposed groups showed no significant change in other parameters compared with the vehicle control group(P>0.05).Conclusion Despite using the same method as the US EPA,a different NOEAL of 15 mg/(kg·d)was obtained in this study.

关键词： Phenol Short-term exposure health advisory Verification

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Ultrafast Magnetization Precession in Perpendicularly Magnetized L10-MnAl Thin Films with Co2 MnSi Buffer Layers

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Chinese Physics Letters 2020年第5期37卷 110-114页

作者： Si-Wei Mao Jun Lu Long Yang Xue-Zhong ruan Hai-Long Wang Da-Hai Wei Yong-Bing Xu jian-Hua Zhao State Key Laboratory of Superlattices and Microstructures Institute of SemiconductorsChinese Academy of SciencesBeijing 100083 Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100190 Beijing Academy of Quantum Information Science Beijing 100193 jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials Collaborative Innovation Center of Advanced MicrostructuresSchool of Electronic Science and EngineeringNanjing UniversityNanjing 210093

Perpendicularly magnetized L10-MnAl thin films with Co2 MnSi bufer layers were prepared on GaAs(001)substrates by molecular-beam epitaxy(MBE).The samples with high crystalline quality show a maximum uniaxial perpendicular magnetic anisotropy constant of 1.4×10^7 erg/cm^*** spin dynamics with a magnetization precession frequency up to 200 GHz was investigated by using time-resolved magneto-optical Kerr effect(TRMOKE)measurements,from which the Gilbert damping constantαof epitaxial L10-MnAl thin films is evaluated to be less than *** work provides an important reference for analyzing the current-induced magnetization switching process in MnAl-based spintronic devices.

关键词： magnetization Gilbert anisotropy

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Numerical simulation research of heating chamber for high performance hydrogen bell-type annealers

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Journal of Energy and Power Engineering 2009年第9期2卷 1-6,16页

作者： LI Wei-jie LU Ji-dong ruan Xin-jian State Key Laboratory of Coal Combustion Huazhong University of Science and Technology Wuhan 430074 China Wuhan Steel Company Wuhan 430083 China

The mathematic model of heating chamber for implementing the prediction of the annealing craft and improving the self adapting with the expansion of the new annealing furnace form, new annealing crafts and new kinds of steel coil has been established. The model developed which including the temperature for gas in heating chamber and the heating cover is based on the characteristics of anneal craft and the situations of locale production run. Firstly, the characteristic of the heating cover which limits the temperature was considered. Secondly, the locale production run condition and dispatching condition were considered. Finally, combining with the models and the simulation system, the numerical simulation research of the anneal process for the high performance hydrogen bell-type annealer as well as the spot experiment test were carried out. The results obtained from the developed models, usually finished less than thirty seconds, are in fair agreement with the test values, such as the relative errors of annealing times were within ±5%, and the quality＇ of the annealed steels were guaranteed.

关键词： bell-type annealer numerical simulation heating chamber: production run: field experiment test

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Absence of ultrasonic-vibration-induced plasticity in metallic glacial glasses

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Rare Metals 2024年第7期43卷 3422-3429页

作者： Zhe Chen Shuai Ren jian Zhu Jie Shen Xin Li He-Ting Zhang Hong-Ji Lin Sajad Sohrabi Wen-Qing ruan Zhen-Xuan Zhang Xiong Liang jiang Ma Jun Shen Shenzhen Key Laboratory of High Performance Nontraditional Manufacturing College of Mechatronics and Control EngineeringShenzhen UniversityShenzhen 518060China Institute of Physics Chinese Academy of SciencesBeijing 100190China School of Mechanical Electrical and Information EngineeringShandong UniversityWeihai 264209China

Metallic glasses (MGs) have been found to exhibit unexpected ultrasonic-vibration-induced plasticity (UVIP),which provides a promising way to realize room temperature processing and molding of ***,whether all MGs poss... 详细信息

关键词： glasses metallic plasticity

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Video Feedback Improves Anesthesia Residents'Communication Skill and Performance on Showing Empathy During Preoperative Interviews

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Chinese Medical Sciences Journal 2024年第4期39卷 282-287页

作者： Di Xia Ya-Hong Gong Xia ruan Li Xu Li-jian Pei Xu Li Rui-Ying Wang Department of Anesthesiology Peking Union Medical College HospitalChinese Academy of Medical Sciences&Peking Union Medical CollegeBeijing 100730China

Objective To determine the impact of scenario-based lecture and personalized video feedback on anesthesia residents'communication skills during preoperative *** A total of 24 anesthesia residents were randomly divided into a video group and a control *** in both groups took part in a simulated interview and received a scenario-based lecture on how to communicate with patients during preoperative ***,residents in the video group received personalized video feedback recorded during the simulated *** week later all the residents undertook another simulated *** communication skills of all the residents were assessed using the Consultation and Relational Empathy measure(CARE)scale by two examiners and one standardized patient(SP),both of whom were blinded to the group *** CARE scores were comparable between the two groups before training,and significantly improved after training in both groups(all P<0.05).The video group showed significantly greater increase in CARE score after the training than the control group,especially assessed by the SP(t=6.980,P<0.001).There were significant correlations between the examiner-assessed scores and SP-assessed scores(both P=0.001).Conclusion Scenario-based lectures with simulated interviews provide a good method for training communication skills of anesthesia residents,and personalized video feedback can enhance their performance on showing empathy during preoperative interview.

关键词： video feedback preoperative interview communication skill simulated interview resident training anesthesiology

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Zyxin promotes hepatocellular carcinoma progression via the activation of AKT/mTOR signaling pathway

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Oncology Research 2023年第5期31卷 805-817页

作者： TIANYING CAI JUNJIE BAI PENG TAN ZHIWEI HUANG CHEN LIU ZIMING WU YONGLANG CHENG TONGXI LI YIFAN CHEN jian ruan LIN GAO YICHAO DU WENGUANG FU Department of Hepatobiliary Surgery Affiliated Hospital of Southwest Medical UniversityLuzhou646000China Biobank The Affiliated Hospital of Southwest Medical UniversityLuzhou646000China Academician(Expert)Workstation of Sichuan Province The Affiliated Hospital of Southwest Medical UniversityLuzhou646000China Department of Medical Oncology First Affiliated HospitalSchool of MedicineZhejiang UniversityHangzhou310000China Department of Health Management The Affiliated Hospital of Southwest Medical UniversityLuzhou646000China

Hepatocellular carcinoma(HCC)is a common malignancy that is driven by multiple genes and *** aim of this study was to investigate the role and specific mechanism of the actin-interacting protein zyxin(ZYX)in *** found that the expression of ZYX was significantly higher in HCC tissues compared to that in normal liver *** addition,overexpression of ZYX in hepatoma cell lines(PLC/PRF/5,HCCLM3)enhanced their proliferation,migration and invasion,whereas ZYX knockdown had the opposite effects(SK HEP-1,Huh-7).Furthermore,the change in the expression levels of ZYX also altered that of proteins related to cell cycle,migration and *** results were obtained with xenograft *** AKT/mTOR signaling pathway is one of the key mediators of cancer *** ZYX overexpression upregulated the levels of phosphorylated AKT/mTOR proteins,its knockdown had the opposite *** addition,the AKT inhibitor MK2206 neutralized the pro-oncogenic effects of ZYX on the HCC cells,whereas the AKT activator SC79 restored the proliferation,migration and invasion of HCC cells with ZYX *** together,ZYX promotes the malignant progression of HCC by activating AKT/mTOR signaling pathway,and is a potential therapeutic target in HCC.

关键词： Zyxin Hepatocellular carcinoma AKT/mTOR Proliferation Migration Invasion

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