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Pressure Drop Measurements on Distillation Columns

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Chinese journal of Chemical Engineering 2011年第5期19卷 779-783页

作者： T.j. cai M.R. Resetarits Fractionation Research Inc. 424 S. Squires St Suite 200 Stillwater OK 74074 USA

Pressure drops are of major importance for distillation/absorption columns. This paper mainly discusses how to correctly measure, interpret and use pressure drop data. The possible causes of incorrect pressure drop measurements are studied including the effects of pressure tap dimensions, locations, and vapor condensation etc. The effect of the static head of vapor on the pressure drop data and column pressures is evaluated. Variations of sectional pressure drops along the column are investigated based on the experimental data obtained from commercial size distillation columns at Fractionation Research, Inc. （FRI）. For a packed column, it is found that the spacing between the liquid distributor and the top of the bed affects the overall pressure drop measurements, which is confirmed by a fundamental fluid dynamics analysis.

关键词： distillation tray packing pressure drop hydraulics

Optimization of Intraday Trading Strategy Based on ACD Rules and Pivot Point System in Chinese Market

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journal of Intelligent Learning Systems and Applications 2012年第4期4卷 279-284页

作者： Xue Tian Cong Quan jun Zhang H. j. cai College of Software Technology South China Agricultural University Guangdong P.R. China International School of Software Wuhan University Wuhan China International School of Software Wuhan University Wuhan China. School of Economics and Management Wuhan University Wuhan P.R. China

Various trading strategies are applied in intraday high-frequency market to provide investors with reference signals to be on the right side of market at the right time. In this paper, we apply a trading strategy based on the combination of ACD rules and pivot points system, which is first proposed by Mark B. Fisher, into Chinese market. This strategy has been used by millions of traders to achieve substantial profits in the last two decades, however, discussions concerning on the methods of calculating specific entry point in this trading strategy are rare, which is crucial to this strategy. We suggest an improvement to this popular strategy, providing the calculating and optimizing methods in detail to verify its effectiveness in recent Chinese futures market. Because of the high liquidity and low commissions in stock index futures market, this trading strategy achieves substantial profits .However, given the less liquidity in commodity futures market, profits decrease and even be neutralized by the relatively high commissions.

关键词： ACD Rules Pivot Point System Pivot Range Optimization

Efficient DFB/EA FM Laser for RF-Transmissions

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Efficient DFB/EA FM Laser for RF-Transmissions

全国第十一次光纤通信暨第十二届集成光学学术会议（OFCIO’2003）

作者： j.cai Z.Chen F.-S.Choa Department of Computer Science and Electrical Engineering University of Maryland Baltimore County

We report an integrated DFB/EA device for high speed FM modulation grown by MOCVD using SAG technique. Preliminary device performances and issues in the improvements are included.

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开孔钢板剪力连接件静力性能试验

中国公路学报 2017年第3期30卷 255-263页

作者：杨勇陈阳蔡军伟西安建筑科技大学土木工程学院陕西西安710055 华侨大学土木工程学院福建泉州362021

为了给组合桥梁的设计提供参考,针对组合桥梁中开孔钢板剪力连接件(PBL连接件),考虑端部承压方式、混凝土强度、孔洞数量以及贯穿钢筋直径4个因素的影响,进行了9个PBL连接件的单调加载推出试验。试验结果表明:端承型试件的抗剪承载力和... 详细信息

为了给组合桥梁的设计提供参考,针对组合桥梁中开孔钢板剪力连接件(PBL连接件),考虑端部承压方式、混凝土强度、孔洞数量以及贯穿钢筋直径4个因素的影响,进行了9个PBL连接件的单调加载推出试验。试验结果表明:端承型试件的抗剪承载力和抗剪刚度高于非端承型试件,而且2种试件的破坏形态有所区别,前者是混凝土板的劈裂破坏,后者是孔内混凝土榫的剪切破坏。采用回归分析法在已有承载力计算方法基础上,改进提出了考虑所有横向钢筋对混凝土约束作用的抗剪承载力表达式。在纵向抗剪刚度计算中,依据弹性地基梁理论,结合国内外68个试验模型的回归分析,提出了适用于单排多孔且考虑端部混凝土承压作用的PBL连接件抗剪刚度计算方法,并给出了PBL连接件在静载下的荷载-滑移曲线模型。与试验结果对比发现,所建立的极限承载力、正常使用阶段抗剪刚度计算公式和荷载-滑移曲线模型都与试验值吻合较好,该研究结果对PBL连接件的静力性能研究具有良好的参考价值。

关键词：桥梁工程开孔板连接件静力试验抗剪承载力抗剪刚度荷载-滑移曲线

Successful treatment of experimental autoimmune myocarditis by adenovirus-mediated gene transfer of antisense CⅡTA

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第二军医大学学报 2006年第1期27卷 64-64页

作者： cai G Zhang j Liu L Shen Q Department of Laboratory Diagnosis Changhai Hospital Second Military Medical University Shanghai 200133 China

Lode Gold Deposits in Eastern Segment of the Northern Orogenic Belt of China:Products of Combined Metallogenesis

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Lode Gold Deposits in Eastern Segment of the Northern Orogen...

Model of Anyons with Spin 1/2 and its Superfluidity

中国科学院地质与地球物理研究所2001学术年会

作者： B.L.Zhang,X.P.cai,j.Wang and j.Han Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing,China,

Bordering eastern Mongolia,Zabaikal and far east of Russia (Fig.1),the region of interest lies in the northeastern part of China,which is the largest alluvial gold concentration district in *** a great deal of exploration work has been carried out in the region for more than 40 years,only several lode gold deposits with varied sizes have been discovered and mined in eastern and northern parts of the *** is that most known lode gold deposits in the region are among small and medium sizes? Is there any potential of finding new lode gold deposits? This paper attempts to give some new ideas on the genesis and evolution of lode gold deposits in the region and proposes some new prospecting targets.

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Model of Anyons with Spin 1/2 and its Superfluidity

第三届青年超导会

作者： Shen Shunqing Department of Physics Fudan University Shanghai 200433 j.cai Shanghai Institute of Metallurgy Academia Sinica Shanghai 200050

＜正＞Basing on the special properties of spins in two-dimensional space,we have presented an abnormal commutation relation between anyone of spin-up and spin-down and have also obtained a general form of many-body wave function for a mizture of anyons with equal numbers of spin-up and spin-down *** demonstrate that such an anyons system is similar to a two-dimensional two-component Coulomb gas model,which can condense into a local siglet pairs forming superfluiding Kosterlitz-Thouless （KT） phase at low temperature.

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采用改进联合正态变换法的随机潮流计算

电力系统自动化 2015年第23期39卷 104-110页

作者：蔡霁霖徐青山丁茂生王旭东东南大学电气工程学院江苏省南京市210096 国网宁夏电力公司宁夏回族自治区银川市750001 国网天津市电力公司天津市300384

为了对随机潮流计算时电力系统中的相关性因素进行建模,提出了一种改进的联合正态变换(jNT)法。首先,介绍了传统jNT法的基本步骤,分析了jNT法建模时能够保持相关性结构不变的原因。然后,介于核心部分在于将正交变换引入到传统jNT法中,根... 详细信息

为了对随机潮流计算时电力系统中的相关性因素进行建模,提出了一种改进的联合正态变换(jNT)法。首先,介绍了传统jNT法的基本步骤,分析了jNT法建模时能够保持相关性结构不变的原因。然后,介于核心部分在于将正交变换引入到传统jNT法中,根据jNT法以正态分布为基础这一特性,提出了一种改进jNT法以提高采样效率,并将该采样法与蒙特卡洛法相结合计算系统随机潮流。最后,利用IEEE 30节点网络设计了算例,分别验证了所提出的改进jNT法和随机潮流算法的可行性。

关键词：相关性建模联合正态变换(jNT) 蒙特卡洛法随机潮流

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人体智能监控系统的通信模式设计

黄冈师范学院学报 2014年第6期34卷 62-64页

作者：蔡思静福建工程学院信息科学与工程学院福建福州350108

引入物联网技术进行人体智能监控系统研究,完成了系统3层结构设计。基于系统的功能组成和性能需要,进行了人体智能监控系统的通信模式设计,提出了有线/无线相结合的通信模式。根据无线射频传输的要求,设计了符合信息传输的数据包格式。... 详细信息

引入物联网技术进行人体智能监控系统研究,完成了系统3层结构设计。基于系统的功能组成和性能需要,进行了人体智能监控系统的通信模式设计,提出了有线/无线相结合的通信模式。根据无线射频传输的要求,设计了符合信息传输的数据包格式。详细分析了结合软件工程思想的上位机通信模块开发,实现数据的有线传输。经测试,实时监控模块达到了零误差传输,从而证明了有线/无线相结合的双层通信模式在智能监控系统应用中的灵活性和可行性。

关键词：智能监控通信模式物联网射频