茶叶中八氯二丙醚残留的气相色谱检测法

研究茶叶中八氯二丙醚残留量的气相色谱检测法.方法:样品用混合提取剂正己烷 丙酮22 3(V/V)提取,过酸性硅藻土净化柱——磺化净化法,用正已烷定容;DB-5MS色谱柱(30m×0.25mm,0.25μm)石英毛细管柱为分离柱,以氮气为载气,不分流进样,采用程序升温方式分离各组分,用检测器(μECD)检测;外标法定量.结果:八氯二丙醚回收率在97.2%～104%间;相对标准偏差在6.8%～7.0%间;结论:该方法可用于大批茶叶样品中八氯二丙醚残留量的检测.     

电液力伺服控制系统设计与动态仿真

介绍了电液力伺服控制系统的特点与应用,利用MATLAB/simulink对工件疲劳实验机控制系统进行了模型建立、稳定性分析及校正设计,得出电液力伺服控制系统设计的一般方法和特点。     

No Human Resource is an Island: Gendered,Racialized Access to Work as a Performer

This article explores the reproduction of gendered, racialized conceptions of age and appearance in structuring access to performing work. Analysis of this issue leads to discussion of a key supposition: that central work experiences of women performers are manifestations of their position as formal and informal proxies for women's experiences in wider society. Women performers are formal proxies in that they are employed to ‘be women’; to represent women for consumption in the circuit of culture. They are informal proxies in that they are allocated to highly segmented labour markets based on wider patterns of gendered, racialized social relations.     

盟军最高统帅部的“轰炸战略”分歧和决策

1944年上半年，欧洲盟军最高统帅部就战略空军的作战目标和任务出现了尖锐的意见分歧。铁路目标、石油目标、城市目标三种主张展开了激烈的争论。在充分讨论的基础上，艾森豪威尔协调各种观点，作出了以运输目标为重点、附带石油目标、默许个别城市目标的“轰炸战略”决策，对“霸王”行动的成功起到了至关重要的作用。     

基于分形理论下的外汇市场的预测

在全球金融一体化的大背景下，汇率的变动作为一个重要指标越来越被人们所重视，利用非线性特征来研究汇率问题已经成为研究的前沿和热点，将混沌与分形运用到汇率预测与汇率控制中是汇率研究的一个重要的分支。为此，分析了分形中的R/S方法，研究了转折点的选择；并以外汇市场中的美元、日元、欧元为例进行了实证分析，指出外汇市场服从分形分布； 运用该方法对外汇的变化进行分析，不仅得出汇率变化遵循有偏的随机游走，而且还预测出这三种汇率未来的走势。     

The role of aspirations and aspirations adaptation in explaining satisficing and bounded rationality

The explanation of bounded rationality in terms of satisficing has been received with skepticism, but Simon's claim that satisficing reflects aspirations and their adaptation could help resolve the matter, particularly taking account of the amplifications introduced by Selten to include motivational factors. Experimental investigations by Guth and his colleagues provide some support. Open-ended, in-depth interviews by Bewley and Schwartz help explain the factors that influence aspirations (which may differ for different tasks), giving attention to affective influences and also to context. They suggest a positive but more complicated relationship between the relative success in realizing profits aspirations and the adaptation of those aspirations, and also in the consequences that aspiration levels have for bounded rationality.     

进出口商如何应对UCP600

UCP600相对于UCP500,在内容上作了大量实质性的修改。进出口商掌握信用证业务操作中的最新变化,对进一步促进我国贸易的发展有着重大的意义。在对UCP500和UCP600不同点分析的基础上,对进口商和出口商在信用证的运作的具体过程中的每一个环节应如何应对UCP600的变化提出了相应的建议。     

Pro/Engineer在工程制图教学中的应用

随着三维CAD技术的飞速发展和广泛应用，针对工程制图课程教学内容、教学方法及手段的特点，引入Pro/Engineer软件为实体建模工具，解决教学中出现的三维实体动态演示问题，探讨三维CAD软件在教学中的应用。     

艾滋病流行对人口安全影响的评价研究——以云南为例

人口安全作为一个涉及与人口诸多要素相关的概念,正被广泛应用于评价人口与社会、经济、生态之间的协调程度。艾滋病对人口安全起着重大的影响作用,分析艾滋病对人口安全的影响,找出艾滋病与人口安全之间的相互作用机制,从人口安全的高度来研究艾滋病预防问题,有助于系统全面地把握艾滋病对人口、社会、经济的影响,提高人口安全的预警能力,对于人口安全系统的协调发展有着重要的作用。     

Multi-attribute utility methods in group decision making: Past applications and potential for inclusion in GDSS

This paper reviews a variety of studies in which multi-attribute utility theory (MAU) has been used successfully to aid group decision processes and discusses the incorporation of MAU in Group Decision Support Systems (GDSS). GDSS of various levels of automation have been proposed to aid group decision making. A number of commercial GDSSs are available which are capable of aiding generation of alternatives, their evaluation, and selection. Many authors have promoted the incorporation of quantitative decision making models in GDSS. The most appropriate quantitative tool for GDSS is MAU, but MAU has rarely been utilized. The cases reviewed illustrate that the use of MAU techniques is not prohibitively difficult or complex.