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Defence Technology（防务技术） 2013年第4期9卷 229-236页

作者： Yan-shuang WANG qian-qian yuan Henan University of Science and Technology

Clearance not only affects the startup torque,rotation precision and stiffness of bearing,but also affects the load distribution,load-carrying capacity and life of bearing.A computational model in which the clearance of bearing is first included is presented for determining the contact force distribution and static load-carrying capacity of a double row four-point contact ball bearing which is subjected to the combined radial,axial and overturning moment *** relation between the negative axial clearance and the contact force distribution is *** static load-carrying capacity curves are established,and the effects of the changes in negative axial clearance,curvature radius coefficient of raceway groove and initial contact angle on the static load-carrying capacity are *** results show that,with the increase in the absolute value of negative clearance,the maximum contact load decreases first and then *** clearance values in the range of 0.2 mme0 mm have little effect on the static load-carrying capacity of *** the increase in the curvature radius coefficient of raceway groove and the decrease in the initial contact angle,the static load capacity of bearing decreases.

关键词：四点接触球轴承承载能力接触力静态双排大尺寸轴向游隙轴向间隙

A study of the flat-band potential of n-type InP semiconductor electrode

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Acta Chimica Sinica(English Edition) 1983年第1期1卷 2-10页

作者： qian Shi-yuan qian Dao-sun SUN Bi-rou Department of Applied Chemistry Shanghai Jiao Tong University Department of Applied Chemistry Shanghai Jiao Tong University

The flat-band potentials of n-type InP in different electrolytes were determined by open-circuit photopotential and differential capacitance *** influences of such factors asredox couples,pH value of the solutions,AC frequency,crystalline face and surface treatment ofthe InP electrode were *** parameters of the electrode were also calculated therefrom.

关键词： InP A study of the flat-band potential of n-type InP semiconductor electrode type

Atomically flat surface preparation for surface-sensitive technologies

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Chinese Physics B 2020年第2期29卷 438-441页

作者： Cen-Yao Tang Zhi-Cheng Rao qian-qian yuan Shang-Jie Tian Hang Li Yao-Bo Huang He-Chang Lei Shao-Chun Li Tian qian Yu-Jie Sun Hong Ding Beijing National Laboratory for Condensed Matter Physics and Institute of Physics Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China National Laboratory of Solid State Microstructures School of PhysicsNanjing UniversityNanjing 210093China Collaborative Innovation Center of Advanced Microstructures Nanjing UniversityNanjing 210093China Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials and Micro-nano Devices Renmin University of ChinaBeijing 100872China Shanghai Synchrotron Radiation Facility Shanghai Institute of Applied PhysicsChinese Academy of SciencesShanghai 201800China Songshan Lake Materials Laboratory Dongguan 250100China

Surface-sensitive measurements are crucial to many types of researches in condensed matter ***,it is difficult to obtain atomically flat surfaces of many single crystals by the commonly used mechanical *** demonstrate that the grind-polish-sputter-anneal method can be used to obtain atomically flat surfaces on topological *** types of surface-sensitive measurements are performed on CoSi(001)surface with dramatically improved quality of *** method extends the research area of surface-sensitive measurements to hard-to-cleave alloys,and can be applied to irregular single crystals with selective crystalline *** may become a routine process of preparing atomically flat surfaces for surface-sensitive technologies.

关键词： grind-polish-sputter-anneal atomically flat single crystal surface topological materials

Ferromagnetic MnSn Monolayer Epitaxially Grown on Silicon Substrate

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Chinese Physics Letters 2020年第7期37卷 115-119页

作者： qian-qian yuan Zhaopeng Guo Zhi-qiang Shi Hui Zhao Zhen-Yu Jia qianjin Wang Jian Sun Di Wu Shao-Chun Li National Laboratory of Solid State Microstructures School of PhysicsNanjing UniversityNanjing 210093China Collaborative Innovation Center of Advanced Microstructures Nanjing UniversityNanjing 210093China Jiangsu Provincial Key Laboratory for Nanotechnology Nanjing UniversityNanjing 210093China

Two-dimensional(2D)ferromagnetic materials have been exhibiting promising potential in applications,such as spintronics *** grow epitaxial magnetic films on silicon substrate,in the single-layer limit,is practically important but *** this study,we realized the epitaxial growth of Mn Sn monolayer on Si(111)substrate,with an atomically thin Sn/Si(111)-231/2×231/2-buffer layer,and controlled the Mn Sn thickness with atomic-layer *** discovered the ferromagnetism in Mn Sn monolayer with the Curie temperature(Tc)of^54 *** the Mn Sn film is grown to 4 monolayers,Tc increases accordingly to^235 *** lattice of the epitaxial Mn Sn monolayer as well as the Sn/Si(111)-231/2×231/2 is perfectly compatible with silicon,and thus an sharp interface is formed between Mn Sn,Sn and *** system provides a new platform for exploring the 2D ferromagnetism,integrating magnetic monolayers into silicon-based technology,and engineering the spintronics heterostructures.

关键词： magnetic integrating ferromagnetic

Interaction Properties of Novel Schiff Base Fluorescent Probe and Metal Ions

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Interaction Properties of Novel Schiff Base Fluorescent Prob...

大环化学和超分子化学的新发展——当前学科交叉的一个重要...

作者： LI qian-qian HU yuan GUO qian-Ni LI Zao-Ying~* (College of Chemistry and Molecular Sciences,Wuhan University,Wuhan 430072,P.R.China)

＜正＞The design and synthesis of chemosensors that have notable capabilities of recognizing and sensing cations is becoming one of the most challenging realms,not only from the viewpoint of organic and supramolecular... 详细信息

关键词： fluorescent probe synthesis structure characterization

Application of Fault Location Mode Based on Travelling Waves for Neutral Non-effective Grounding Systems

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Journal of Measurement Science and Instrumentation 2010年第S1期1卷 133-138页

作者： Tao Ji qian-qian yuan Chang-ming Li Ying Sun (Scientific Research Office Weifang University Weifang,China College of Information and Electrical EngineeringShandong University of Science and Technology Qingdao,China)

Fault location for distribution feeders short circuit especially single-phase grounding fault is an important task in distribution system with non-effectively grounded *** location mode for distribution feeders using fault generated current and voltage transient traveling waves was *** characteristics of transient traveling waves resulted from each short circuit fault and their transmission disciplinarian in distribution feeders are *** paper proposed that double end travelling waves theory which measures arriving time of fault initiated surge at both ends of the monitored line is fit for distribution feeders but single end traveling waves theory *** to different distribution feeders,on the basis of analyzing original traveling waves reflection rule in line terminal, Current-voltage mode,voltage-voltage mode and current-current mode for fault location based on traveling waves are proposed and aerial mode component of original traveling waves is used to realize fault *** test verify the feasibility and correctness of the proposed method.

关键词： distribution feeders neutral non-effective grounding traveling waves fault locationmode

Synthesis A Series of Novel Aqueous Thiourea Derivatives and Metal Complexes

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Synthesis A Series of Novel Aqueous Thiourea Derivatives and...

大环化学和超分子化学的新发展——当前学科交叉的一个重要桥梁——中国化学会全国第十五届大环化学暨第七届超分子化学学术讨论会

作者： LI qian-qian HU yuan LI Zao-Ying~* (College of Chemistry and Molecular Sciences,Wuhan University,Wuhan 430072,P.R.China)

Thiourea derivatives display a wide range of biological activity,including antibacterial,antifungal, antitubercular,antithyroid,antihelmintic,rodenticidal,insecticidal,herbicidal,and plant-growth regulator *** of aque... 详细信息

关键词： thiourea derivative metal complex synthesis

Interaction of Aqueous Thiourea Derivatives with Bovine Serum Albumin

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Interaction of Aqueous Thiourea Derivatives with Bovine Seru...

大环化学和超分子化学的新发展——当前学科交叉的一个重要桥梁——中国化学会全国第十五届大环化学暨第七届超分子化学学术讨论会

作者： LI qian-qian HU yuan LI Zao-Ying~* (College of Chemistry and Molecular Sciences,Wuhan University,Wuhan 430072,P.R.China)

Serum albumin,an abundant protein constituent of blood plasma,facilitates the disposition and transportation of various exogenous and endogenous *** are capable of binding an extraordinarily broad range of pharmaceuti... 详细信息

关键词： thiourea derivatives bovine serum albumin interaction

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学龄前儿童教育类APP的体验设计

包装工程 2016年第20期37卷 194-197页

作者：林倩倩孙远波北京电子科技职业学院北京100176 北京理工大学北京100081

目的研究学龄前儿童教育类APP中的体验设计。方法研究体验设计、儿童发展心理学等相关理论,观察学前龄儿童操作APP实例,总结优秀APP特征,提出针对学龄前儿童教育类APP的设计要求。结论在设计学龄前儿童教育类APP的过程中,应充分考虑学... 详细信息

目的研究学龄前儿童教育类APP中的体验设计。方法研究体验设计、儿童发展心理学等相关理论,观察学前龄儿童操作APP实例,总结优秀APP特征,提出针对学龄前儿童教育类APP的设计要求。结论在设计学龄前儿童教育类APP的过程中,应充分考虑学领前儿童的发展阶段和基本需求,以促进儿童心智发展。能在游戏中学习、达到教育目标,才是设计的真正目的。

关键词：学龄前儿童体验教育交互设计

Malachite green inhibits growth and induces apoptosis in SHSY5Y cells through ROS generation

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Malachite green inhibits growth and induces apoptosis in SHS...

中国神经科学学会第十二届全国学术会议

作者： Hai-Zhou ZHAO Yan-Hong MA Yi-Ting WU Xiao-Jun ZHAO qian-qian yuan Zhan-Le LIN Wen-Hua LIU School of Life Sciences Zhaoqing University

Objective Several environmental pollutants have been associated with neurodegenerative disorders. In this study,we are aimed at investigating the cytotoxicity of malachite green on human neuroblastoma cells SH-SY5 Y and its mechanism. Methods Survival of SH-SY5 Y cells treated with malachite green 0.125, 0.25, 0.5, 1, 2, 4, 8, 16 or 20 mg·L-1 for 24 h were measured with MTT assay. Apoptosis was determined by Annexin V-FITC/PI staining. The protein level of Caspase 3 was measured by Western blotting. The change of reactive oxygen species（ROS）was detected with DCFH-DA probe. Results Compared with control group, malachite green（≥1 mg·L-1） inhibited the proliferation of SH-SY5 Y obviously in an almost concentration-dependent manner（P＜0.05）, and the IC50 was 3.5 mg·L-1. Annexin V-FITC/PI staining showed that apoptosis was induced by malachite green, and the apoptotic rates of malachite green 1, 2, 5 mg·L-1 groups increased to 2%, 13.5%, and 99.8% from 0.9% of control group（P＜0.05）. In addition, Western blotting showed that malachite green 2, 2.5, 5 mg·L-1 groups up-regulated the expression of Cleaved Caspase 3（P＜0.05）. DCFH-DA labeling showed that the generation of ROS was about 4-fold as compared to control group after treatment with 2.5 mg·L-1 malachite green for 24 h. While, N-acetyl-L-cysteine（NAC） pretreatment, a scavenger of ROS, significantly reduced ROS and Cleaved Caspase 3 expression levels. Conclusion Malachite green may induce apoptosis of SH-SY5 Y cells by oxidative damage.

关键词： Malachite green SH-SY5Y cells apoptosis Caspase 3 reactive oxygen species