我国汽车产业的国有产权、市场结构与市场绩效研究

由于产业性质的不同,跨部门分析只能从总体而不能从个体揭示各个产业的绩效与产权和市场结构之间的准确关系,本文针对单个产业(汽车)的绩效与产权和市场结构之间的关系进行了实证分析,实证结果表明市场集中度对经济绩效表现出了正效应而国有产权和产业规模对经济绩效表现出了显著的负效应。     

The changing spatial distribution and concentration of Australias chinese and Vietnamese communities: An analysis of 1986–2006 Australian population census data

This paper describes the changing spatial distribution and concentration of Chinese and Vietnamese communities in Australia over the two past decades. The research analyses data of individuals (i) born in the People’s Republic of China or Vietnam, (ii) of Chinese or Vietnamese ancestry, and (iii) who spoke Chinese or Vietnamese languages at home. Basic demographic and economic factors at the SLA level are considered to provide an initial discussion of meso-level factors which may have contributed to changes in Chinese-and Vietnamese-Australian distributions and concentrations since 1986. As expected, from field observations, the data reveal a contrasting picture of the spatial distribution and concentration of the Chinese- and Vietnamese-Australian communities, and indicate that although a few areas of high Vietnamese spatial concentration have persisted into 2006, and a few areas of high’ Chinese spatial concentration have developed since 1986, overall there is an increasing dispersion of both communities into the broader Australian community.     

论竞争法上当事人的确定

竞争法案件中,当事人的确定不仅关系到明确权利、义务、责任的承担者,而且是评价市场力量的重要前提,只有在确定了当事人以后,才能进行市场力量的计算,从而评价各种限制竞争行为的后果,判明其违法性。而如何在具体竞争案件中确定当事人,是一个十分复杂的问题。本文针对竞争法的主要领域,即限制竞争协议、支配地位滥用行为以及企业合并情形下当事人的确定规则,进行深入分析,而尤以企业合并情形为重点。在英文中,各种竞争案件的当事人往往称作“undertakingsconcerned”,我们在此将其称作“所涉企业”。     

瞬态浓度场的光学测量系统

基于数字图像处理技术和光学粒子散射理论，研制了具有非接触式、全场测量、被测面积大和成本低等特征的瞬态浓度场定量光学测量系统，其可以测量瞬态浓度场的相对值，经过标定也可以测量绝对值．实验结果表明，该系统与传统的接触式单点浓度测量方法相比，具有显著的全场瞬态测量的优越性，应用前景广阔。     

水处理工程中的参数优化

在水处理过程中 ,选取合理的设计参数能使处理费用达到最小 ,对污泥负荷以及厌氧———好氧的接口浓度的优化进行了探讨     

果蔬气调包装设计及贮藏期预测

建立了果蔬气调包装的数学模型,通过数值模拟预测包装袋内的气体浓度变化及达到动态平衡时的气体浓度,给出了包装材料的确定方法及不同气调参数下果蔬气调包装贮藏期的预测方法.以黄桃为研究对象,测定了5℃和25℃下自发气调包装的气体浓度变化规律,进行了0℃及体积分数为2%O2、5%CO2初始浓度条件下的主动气调包装贮藏实验.实验结果验证了数学模型预测结果的正确性.     

Bayesian Measures of the Minimum Detectable Concentration of an Immunoassay

The minimum detectable concentration (MDC) is one of the most important properties of an assay. It is a statement about the smallest physical quantity an assay can reliably measure, and is used in assay design and quality control assessments. A plethora of measures of the MDC have been reported in a widely scattered literature. Many of these were developed at a time when accuracy and relevance had to be sacrificed for computational feasibility. This paper identifies limitations of existing measures and demonstrates how Bayesian inference may be used to overcome these limitations. Several new measures of the MDC are developed. These are conceptually simpler than existing measures, and are free of analytical approximations. The recent advances in Bayesian computation make them efficient to evaluate. A procedure developed in this paper measures the difference in the quality of two assays and shows that the new Bayesian measures perform better than existing measures.     

气相色谱——电子捕获法宝测定人血浆中阿那曲唑浓度

建立测定人血浆中阿那曲唑浓度的方法。方法:用气相色谱-电子捕获法分离分析阿那曲唑和内标物(地西泮),采用50％苯基甲基础酮毛细管柱(30m×0.53mm,0.5μm),以高纯氮(99.999％)为载气,压力为170kPa,尾吹为60mL·min~(-1)。进样口温度为260℃,炉温为220℃。~(63)Ni电子捕获测器,检测器温度为260℃。血样在碱性条件下,用甲基叔丁醚1次提取。结果:血药浓度测定的线性范围为1.325～106μ·L~(-1)。低、中、高血药浓度(5.3,21.2,53.0μg·L~(-1))提取回收率分别为76.8％,87.0％,78.7％。日内和日间精密度均小于9％。20名中国健康男性志愿者单剂量口服阿那曲唑2mg后,0.55～132h内血药浓度在2.8～53.2μg·L~(-1)的范围内。结论:该法简便、准确、灵敏,可用于阿那曲唑生物利用度和药代动力学研究。     

Properties of a class of inequality measures: A proposal for a resistant version

Summary This note explores the robustness properties of a general class of ineqyality measures which includes the Bonferroni and the Gini indexes as special cases and proposes some modifications in order to make them outlier resistant.     

再入等离子体鞘套中电磁波Helmholtz方程的近似解

本文以样条函数(spline function)作为电磁波Helmholtz方程的近似解,求解了等离子体鞘套的反射系数和透射系数。本文采用的样条函数法具有数学推导和数字计算简单,可适用于任意电子浓度分布的优点,并且计算结果与美国RAM C系列飞行实测数据吻合得比较好。同时,本方法还可用于求解其它不均匀介质中的电波传播问题。