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Syntheses and Structural Researches of Yb^(3+) Complexes with Nitrilotriacetic Acids──Nine-coordinate K_3[Yb(nta)_2(H_2O)]·5H_2O and Eight-coordinate Na_3[Yb(nta)_2]·6H_2O Complexes

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Chemical Research in Chinese Universities 2003年第2期19卷 145-150页

作者： WANG Jun zhang xiang dong JIA Wei guo LI Hui fang Department of Chemistry Liaoning UniversityShenyang 110036P.R.China

Yb 3+ complexes with two nitrilotriacetic acid molecules were prepared and their compositions were determined as K 3[Yb(nta) 2(H 2O)]·5H 2O and Na 3[Yb(nta) 2]·6H 2O by elemental analyses. Their structures were characterized by single crystal X ray diffraction analyses. In complex K 3[Yb(nta) 2(H 2O)]·5H 2O, the YbN 2O 7 part forms a nine coordinate monocapped square antiprismatic structure. In complex Na 3[Yb(nta) 2]·6H 2O, the YbN 2O 6 part forms an eight coordinate square antiprismatic structure. It can be seen that the outer cations (K + and Na +) greatly affect the coordination number and coordinate structure from these results.

关键词： Yb^(3+) complex Nitrilotriacetic acid Crystal structure

A Phase-Perturbation Technique for Light Scattering from Randomly Dielectric Rough Surfaces

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Chinese Physics Letters 1997年第1期14卷 32-35页

作者： zhang xiang-dong WU Zhen-sen WU Cheng-ke Department of Information Engieering Xidian UniversityXi'an 710071

With the theory of rough surfaces scattering,a numerical formula for calculating the bistatic and backscattering radar cross section from randomly dielectric rough surfaces is derived by using phase-perturbation *** backscattering laser radar cross sections per unit of some rough samples are computed at λ=1.06μ*** numerical results are in good agreement with experimental data.

关键词： technique. backscattering Rough

All-or-Nothing-Type Kochen-Specker Experiment with Thermal Lights

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Chinese Physics Letters 2012年第11期29卷 108-111页

作者： SONG Xin-Bing WANG Hai-Bo XIONG Jun zhang xiang-dong Department of Physics Applied Optics Beijing Area Major LaboratoryBeijing Normal UniversityBeijing 100875 School of Physics Beijing Institute of TechnologyBeijing 100081

Recently,the Kochen–Specker theorem has been demonstrated and quantum contextuality has been observed experimentally by using special and independent quantum *** the other hand,recent investigations have shown that a thermal light source can mimic the two-photon entangled source to perform the imaging *** perform an all-or-nothing–type Kochen-Specker experiment using the thermal light source and obtain the same results as those using quantum *** physical origin for such a phenomenon is analyzed.

关键词： states quantum thermal

Self-Q-Switched and Mode-Locked Cr,Nd:YAG Laser under Direct 885 nm Diode Laser Pumping

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Chinese Physics Letters 2012年第5期29卷 147-150页

作者： JIANG Man zhang Qiu-Lin ZHOU Wen-Jia zhang Jing zhang dong-xiang FENG Bao-Hua Laboratory of Optical Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190

A simultaneous self-Q-switched and mode-locked laser in a direct 885nm diode-pumped Cr,Nd:YAG crystal is *** improvement of the slope efficiency (38.1%) in the absorbed pump power is obtained under direct *** the maximum output power of 3.36 W,the repetition rate of the Q-switched envelopes is 95 kHz and the corresponding pulse width is 400 *** 100% mode-locked modulation depth is observed at the output power of 75 m *** repetition rate of mode-locked pulses within a Q-switched envelope is 130 MHz,and the mode-locked pulse width stays within the scale of 500ps.

关键词： Nd:YAG switched pumped

Degradation of dyestuff wastewater using visible light in the presence of a novel nano TiO_2 catalyst doped with upconversion luminescence agent

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Journal of Environmental Sciences 2005年第5期17卷 727-730页

作者： WANG Jun WEN Fu-yu zhang Zhao-hong zhang xiang-dong PAN Zhi-jun zhang Lei WANG Lei XU Liang KANG Ping-li zhang Peng Department of Chemistry Liaoning University Shenyang 110036 China Department of Environment Liaoning University Shenyang 110036 China Center of Analysis and Test Liaoning University Shenyang 110036 China

A new upconversion luminescence agent, 40CdF2·60BaF2·0.8ErO3, was synthesized and its fluorescent spectra were determined. This upconversion luminescence agent can emit five upconversion fluorescent peaks shown in the fluorescent spectra whose wavelengths are all below 387 nm under the excitation of 488 nm visible light. This upconversion luminescence agent was mixed into nano rutile TiO2 powder by ultrasonic and boiling dispersion and the novel doped nano TiO2 photocatalyst utilizing visible light was firstly prepared. The doped TiO2 powder was charactered by XRD and TEM and its photocatalytic activity was tested through the photocatalytic degradation of methyl orange as a model compound under the visible light irradiation emitted by six three basic color lamps. In order to compare the photocatalytic activities, the same experiment was carried out for undoped TiO2 powder. The degradation ratio of methyl orange in the presence of doped nano TiO2 powder reached 32.5% under visible light irradiation at 20 h which was obviously higher than the corresponding 1.64% in the presence of undoped nano TiO2 powder, which indicate the upconversion luminescence agent prepared as dopant can effectively turn visible lights to ultraviolet lights that are absorbed by nano TiO2 particles to produce the electron-cavity pairs. All the results show that the nano rutile TiO2 powder doped with upconversion luminescence agent is a promising photocatalyst using sunlight for treating the industry dye wastewater in great force.

关键词： upconversion luminescence agent nano TiO2 photocatalytic degradation visible light methyl orange

Atomic multicast protocol for intrusion-tolerance based on trusted timely computing base

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The Journal of China Universities of Posts and Telecommunications 2009年第6期16卷 97-102页

作者： ZHOU Hua,MENG xiang-ru,zhang Li,QIAO xiang-dong Telecommunication Engineering Institute,Air Force Engineering University,Xi’an 710077,China [a] Telecommunication Engineering Institute Air Force Engineering University Xi'an 710077 China

Distributed architecture is often adopted for the intrusion-tolerance system ***,this distributed intrusiontolerance system has a consensus *** solve this problem,this article explores a distributed intrusion-tolerance system of hybrid time model based on trusted timely computing base（TTCB） and implement an atomic multicast protocol using TTCB *** TTCB is a trust secure real-time component inside the server,with a well defined interface and separated from the operation *** is in the synchronous communication environment,while the application layer in the server works *** the atomic multicast protocol,it can be achieved that when the servers are over twice the number of faulty servers,the consensus can be *** performance evaluations show that the proposed protocol can yield larger good throughput with a lower unavailability.

关键词： Intrusion-tolerance atomic multicast protocol consensus TTCB network security

Angular Dependence of the Interlayer Exchange Coupling on the Nonmagnetic Cap Layers

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Chinese Physics Letters 1997年第10期14卷 789-792页

作者： zhang xiang-dong LI Lie-ming ZHAN Ye-hong LI Bo-zang PU Fu-ke Institute of Physics&Center for Condensed Matter Physics Chinese Academy of SciencesBeijing 100080 2Department of Physics Tsinghua UniversityBeijing 100084 3Department of Physics Guangzhou Industry UniversityGuangzhou 510090 4Department of Physics Guangzhou Normal CollegeGuangzhou 510400

Based on the one-band tight-binding model,the angular dependence of interlayer exchange coupling was investigated on the nonmagnetic cap layers in a magnetic sandwich covered on both sides by nonmagnetic *** results show that(1)the appearance of noncollinear exchange coupling is very sensitive to the cap layers,(2)the nonoscillatory component of the coupling strength varies generally with the thickness of outer nonmagnetic films,and(3)the variation of exchange coupling exhibits distinct features in the cases where the thicknesses of both outer nonmagnetic films vary simultaneously and where the thickness of one of the two outer nonmagnetic films is fixed while the other is varied.

关键词： coupling outer magnetic

Rectifying Characteristics and Transport Behavior in a Schottky Junction of CaCu _(3)Ti_(4)O_(12) and Pt

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Chinese Physics Letters 2011年第8期28卷 270-273页

作者： CHEN Cong NING Ting-Yin WANG Can ZHOU Yue-Liang zhang dong-xiang WANG Pei MING Hai YANG Guo-Zhen Anhui Key Laboratory of Optoelectronic Science and Technology University of Science and Technology of ChinaHefei 230026 Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190

CaCu _(3)Ti_(4)O_(12)(CCTO)thin films were fabricated on ITO−covered MgO(100)*** rectification characteristics were observed in the CCTO capacitance structure with Pt top electrodes at temperatures ranging from 150 K to 330 K,which are attributed to the formation of a Schottky junction between n-type semiconducting CCTO and Pt due to the difference of their work *** low forward-bias voltage,the current-voltage characteristics of the Schottky junction follow J=JsD exp[qV/(k0T)].A strong decrease in ideality factor with the increasing temperature is obtained by linear fitting at the low bias voltage.

关键词： CCTO Schottky

冻土三轴蠕变特性试验研究及平面冻土墙厚度的确定

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岩土力学 2011年第8期32卷 2261-2266页

作者：张向东傅强辽宁工程技术大学土木与交通学院辽宁阜新123000

主要是对冻土的三轴蠕变特性进行分析研究,从而进一步确定具有明显流变特性的平面冻土墙的厚度。通过对冻土的流变特性进行理论分析,建立了冻黏土在复杂应力状态下的对数型蠕变方程。采用"低温箱-三轴压力室"轻型试验设备系统对人工配... 详细信息

主要是对冻土的三轴蠕变特性进行分析研究,从而进一步确定具有明显流变特性的平面冻土墙的厚度。通过对冻土的流变特性进行理论分析,建立了冻黏土在复杂应力状态下的对数型蠕变方程。采用"低温箱-三轴压力室"轻型试验设备系统对人工配制的冻黏土试件进行了三轴蠕变试验,获得了冻黏土在复杂应力状态下的蠕变曲线。根据试验结果,对冻黏土的对数型非线性蠕变方程进行回归分析,得到了冻黏土对数型蠕变方程参数的数值。根据冻土流变理论和所建立的蠕变方程,以及平面冻土墙的厚度计算公式,利用Visualc++6.0和Matlab 6.0技术开发了冻土墙厚度计算的计算机应用软件。分析研究了平面冻土墙厚度与跨度、基坑暴露时间、基坑开挖深度的关系。平面冻土墙厚度随时间的延长在短期内具有急速增长的趋势,而后随时间的延长逐渐趋于稳定;平面冻土墙厚度受其跨度的影响较小,但随基坑开挖深度的加深具有逐步增长的趋势;温度对平面冻土墙厚度的影响显著,温度越高,厚度越大,所以,控制温度是平面冻土墙设计中的关键。从而为蠕变变形较大的平面冻土墙的厚度确定提供了依据。

关键词：冻黏土蠕变流变理论冻土墙