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Principle of a Multistage Electroosmotic Pump and Its Application in Microfluidic Chip

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高等学校化学学报 2004年第Z1期25卷 30-页

作者： chen Ling-Xina GUAN ya-Feng Department of Chemistry Tsinghua University Beijing 100084 China Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116012 China

　　In the past decade, a variety of microfabricated pumps and fluid-handling systems based on ultrasonic, electricity, light, magnet and heat actuated technologies were reported[1], which could be classified into two groups: membrane-displacement pumps and field-induced flow pumps. An advantage of field-induced flow pumps over the former is that they do not require moving parts, such as check valves which complicate the fabrication, sealing, and operation of the systems.……

关键词： Electroosmotic pump Multi-stage Micro total analysis system

硫酸盐溶液中温度对方解石和白云石溶解度的影响

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河海大学学报（自然科学版） 2011年第6期39卷 661-664页

作者：陈楠梁冰辽宁工程技术大学力学与工程学院辽宁阜新123000

为了研究温度对硫酸盐溶液侵蚀石灰岩和白云岩的影响,应用美国联邦地质调查局开发的水化学模拟软件PHREEQC对在不同CO2分压下,不同浓度的Na2SO4和MgSO4溶液中的方解石和白云石的溶解度和温度的关系进行了化学模拟.模拟结果表明:在无CO2... 详细信息

为了研究温度对硫酸盐溶液侵蚀石灰岩和白云岩的影响,应用美国联邦地质调查局开发的水化学模拟软件PHREEQC对在不同CO2分压下,不同浓度的Na2SO4和MgSO4溶液中的方解石和白云石的溶解度和温度的关系进行了化学模拟.模拟结果表明:在无CO2分压的情况下,在同浓度的盐溶液中,方解石和白云石的溶解度随着温度的升高迅速升高;在CO2分压为10-4.5MPa时,方解石和白云石的溶解度随着温度的升高而逐渐降低,然而始终大于在无CO2分压时的溶解度;在Na2SO4溶液中,方解石和白云石溶解度均大于在纯水中的溶解度;方解石在MgSO4溶液中的溶解度大于在同条件下Na2SO4溶液中的溶解度.在无CO2影响时,溶液内含有的SO24-浓度大小对石灰岩和白云岩侵蚀能力的影响,不随温度的改变而改变;温度的升高可以增强盐效应;在CO2分压为10-4.5MPa时,等温条件下能产生盐效应最强的浓度的溶液对石灰岩和白云岩的侵蚀能力最强.

关键词：方解石白云石硫酸盐溶解度温度 PHREEQC软件

TWO NEW INDOLE ALKALOIDS FROM MELODINUS MORSEI

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Chinese Chemical Letters 1992年第9期3卷 715-718页

作者： ya Li HE Wei Ming chen Xiao Zhang FENG Institute of Materia Medica,Chinese Academy of Medical Sciences,Beijing 100050

Two new indole alkaloids named 152-hydroxy-14,15-dihydro-vindo- linine and 152-hydroxy-14,15-dihydro-16-epi-vindolinine were isolated from Melodinus *** structures were established by spectroscopic means and compariso... 详细信息

关键词： NOE TWO NEW INDOLE ALKALOIDS FROM MELODINUS MORSEI ppm

Study on concentration and turbulence of solid-liquid FAE in dispersal process

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Defence Technology（防务技术） 2018年第6期14卷 657-660页

作者： Jia-chen chen Xin Ma Qiu-ju Ma China Zhongyuan Engineering Corporation Beijing 100191China China Ordnance Society Beijing 100089China College of Resources&Safety Engineering China University of Mining&Technology(Beijing)Beijing 100083China

This paper describes numerical simulation on dispersion of the solid-liquid mixed fuel driven by explosion load. A model used in numerical calculation for dispersion of solid-liquid mixed fuel was established in this study. The concentration and turbulent intensity in the multiphase cloud of the solidliquid mixed fuel were obtained by numerical simulation. It was found that the fuel concentration tended to be 0.15 kg/m^3, the turbulence intensity tended to be 7 in 90 ms. The numerical results agree with those measured in the experiment.

关键词： Solid-liquid mixed fuel Concentration Turbulence intensity Numerical simulation

时变时滞与切换有向通信拓扑协议下线性多智能体系统一致性的平均驻留时间条件

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控制与决策 2016年第2期31卷 349-354页

作者：张亚霄陈阳舟北京工业大学城市交通学院北京100124

研究时变时滞与切换有向通信拓扑协议下高阶连续时间线性多智能体系统的一致性问题.利用一个线性变换将该问题等价转化为一个切换时滞系统的稳定性问题.假定出现的每一个通信拓扑都是可一致的,借助时滞切换系统稳定性的平均驻留时间方法... 详细信息

研究时变时滞与切换有向通信拓扑协议下高阶连续时间线性多智能体系统的一致性问题.利用一个线性变换将该问题等价转化为一个切换时滞系统的稳定性问题.假定出现的每一个通信拓扑都是可一致的,借助时滞切换系统稳定性的平均驻留时间方法,以线性矩阵不等式(LMIs)形式给出多智能体系统达到全局一致的充分条件.数值实例验证了结果的正确性.

关键词：多智能体系统一致性切换有向通信拓扑时变时滞平均驻留时间线性矩阵不等式

Characterization of an ionic liquid electrospray thruster with a porous ceramic emitter

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Plasma Science and Technology 2020年第9期22卷 66-74页

作者： Chong chen Maolin chen Haohao ZHOU Combustion Internal Flow and Thennal-Structure LaboratoryNorthwestern Polytechnical UniversityXi’an 710072People’s Republic of China

An ionic liquid(IL)electrospray thruster was developed for application in micro-nano satellites or gravitational wave *** thruster employed a porous ceramic emitter with seven emitter strips located on its emission *** any liquid-supply device,IL was delivered through porous media to emitter strips via capillary *** emission sites then formed at the tip of each strip.A charged beam of up to 350μA(with a current density of 540μA cm^(-2))was stably produced in the negative ***,in the positive mode,a corona was observed which could prevent the thruster from emitting larger current.A time-of-flight mass spectrometer with significantly improved signal-to-noise ratio was built,which was used to obtain the mass distribution of the beam of the thruster.A retarding potential analysis was also *** test results showed that the thruster worked in the pure-ion regime,and delivered a maximum thrust of 67.1μN with specific impulses of 3952 s and 3117 s in the positive and negative modes,respectively.

关键词： electrospray thruster time-of-flight(TOF) retarding potential analysis(RPA)

Synthesis and Structural Characterization of Bis(2,2'-bpy)bis(azide)cobalt(Ⅲ)nitrate dihydrate

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Chinese Journal of Structural Chemistry 2002年第3期21卷 260-263页

作者： chen Hong-Ji Department of Chemistry Jinan UniversityGuangzhou 510632China

The title complex [CoIII(2, 2?bpy)2(N3)2]種O3?H2O was obtained by an auto-oxidization reaction of cobalt nitrate with 2, 2-bpy and sodium azide in aqueous solution at room temperature, and violet single crystals were prepared in ethanol solution. The structure was determined by X-ray crystallography. The crystal is of triclinic, space group P ?with a = 8.285(4), b = 11.990(8), c = 12.596(7) ? a = 86.630(3), b = 86.280(5), g = 71.130(10)? C20H20CoN11O5, Mr = 553.40, Z = 2, V = 1180.6(12) ?, F(000) = 568, Dc = 1.557 g/cm3, m = 0.784 mm-1, R = 0.0403 and wR = 0.1008. The title complex consists of a [CoⅢ(2, 2?bpy)2(N3)2]+ cation, a NO3- anion and two lattice water molecules. The center CoⅢ ion coordinated by two chelating 2, 2?bpy ligands and two terminal azide groups with a CoN6 coordination environment exhibits a distorted octahedral geometry.

关键词： complex,2,2’-bipyridine sodium azide synthesis crystal structure

Drag Force on a String Fastened to a Sphere Moving in a Viscous Fluid

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Chinese Physics Letters 1996年第9期13卷 689-692页

作者： Shan-tarng chen Department of Physics National Chung-Hsing UniversityTaichungTaiwan

The viscous drag force acting on a thin cotton string fastened to a sphere moving in glycerin has been determined by using a photogate apparatus,showing that the force acting on the string agrees with a simplified 2-d... 详细信息

关键词： simplified viscous apparatus

具有噪声过滤功能的协同训练半监督主动学习算法

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模式识别与人工智能 2009年第5期22卷 750-755页

作者：詹永照陈亚必江苏大学计算机科学与通信工程学院镇江212013

针对基于半监督学习的分类器利用未标记样本训练会引入噪声而使得分类性能下降的情形,文中提出一种具有噪声过滤功能的协同训练半监督主动学习算法.该算法以3个模糊深隐马尔可夫模型进行协同半监督学习,在适当的时候主动引入一些人机交... 详细信息

针对基于半监督学习的分类器利用未标记样本训练会引入噪声而使得分类性能下降的情形,文中提出一种具有噪声过滤功能的协同训练半监督主动学习算法.该算法以3个模糊深隐马尔可夫模型进行协同半监督学习,在适当的时候主动引入一些人机交互来补充类别标记,避免判决类别不相同时的拒判和初始时判决一致即认为正确的误判情形.同时加入噪声过滤机制,用以过滤由机器自动标记的可能是噪声的样本.将该算法应用于人脸表情识别.实验结果表明,该算法能有效提高未标记样本的利用率并降低半监督学习而引入的噪声,提高表情识别的准确率.

关键词：表情识别协同训练半监督主动学习噪声过滤机制模糊深隐马尔科夫模型(FBMM)