相机光轴视觉反馈校正研究

提出了基于视觉伺服的相机光轴反馈校正法,将图像的线性畸变与非线性畸变相分离,先采用多幅模板图像对相机进行高精度标定,获得相机非线性系数;根据这些系数经反复迭代后消除非线形畸变;再利用线性畸变,引入反馈环节精细调节相机至精确位置。该方法不需要特殊的导引装置,很好地解决了相机光轴的高精度校正问题。     

基于跨期均衡模型的国际储备需求分析和数值模拟

本文研究的目的在于构造一个基于代表行为人的跨期均衡模型,将持有国际储备的交易性动机、预防和保险性动机以及"重商主义"动机集中到同一个框架中加以分析,探讨了国际储备需求量与各影响因素之间的关系,并利用数值模拟的方法估计我国国际储备需求的最优水平.研究结果表明:一国在当期的最优国际储备需求量与历史上若干期的产出、资本流动以及国内信用等因素有关,直接反映了持有国际储备的前两种动机,而国内居民对实际货币余额的偏好系数则决定了"重商主义"动机所带来的国际储备规模.基于国际储备需求理论解的数值模拟表明,截至2006年底,我国最优的国际储备额应为7732.27亿美元,而事实上,我国实际持有的国际储备额却达到了10704亿美元,过度储备占到总储备量的27.8%.     

Calibration of the estimators of variance

This investigation suggests new techniques to calibrate estimators of variance. Estimators of the variance of simple mean, ratio and regression estimators under different sampling schemes are shown to be special cases of the proposed calibration techniques. The approach has more practical use due to recent advances in programming techniques and computational speed. An empirical study has been carried out to address the properties of these proposed strategies.     

论附带民事诉讼精神损害赔偿责任的构成要件

文章以我国刑事附带民事诉讼中应确立精神损害赔偿制度为立论基础,论述了我国刑事附带民事诉讼精神损害赔偿责任的构成要件,以期对我国刑事附带民事诉讼立法、理论和实践有所裨益。     

Functional calibration estimation by the maximum entropy on the mean principle

We extend the problem of obtaining an estimator for the finite population mean parameter incorporating complete auxiliary information through calibration estimation in survey sampling under a functional data framework. The functional calibration sampling weights of the estimator are obtained by matching the calibration estimation problem with the maximum entropy on the mean – MEM – principle. In particular, the calibration estimation is viewed as an infinite-dimensional linear inverse problem following the structure of the MEM approach. We give a precise theoretical setting and estimate the functional calibration weights assuming, as prior measures, the centred Gaussian and compound Poisson random measures. Additionally, through a simple simulation study, we show that the proposed functional calibration estimator improves its accuracy compared with the Horvitz–Thompson one.     

Variables acceptance reliability sampling plan for repairable items

Traditionally, acceptance reliability sampling plans have been developed for non-repairable items. However, the functions required for items become more and more complex and, accordingly, the items are composed of several components and tend to be repairable. In this paper, we consider variables acceptance reliability sampling plan for repairable items. We develop a variables acceptance sampling plan based on the failure and repair data observed during the testing period. It is shown that the developed sampling plan improves the reliability characteristic of the population and that the lifetimes of items before and after the reliability sampling test are stochastically ordered.     

跨文化视野下的学科会聚

学科的交叉和会聚需要理论的支撑.它包括三个方面的内容:(1)中心项(Central Item),学科会聚与交叉必有一个主要的领域、学科或学说,这是确定首席专家的依据;(2)关联域(Context),即构成该学科会聚的以中心项为主的相关领域,这是确定准入人员、准入项目的依据;(3)学科间性(Inter-disciplinity),这是学科交叉会聚所产生的新的质素,即新的前沿性领域、新的关节点,也是学科会聚所要探索的新知识.一个新的科研群体是否有前景、有地位,主要取决于对"学科间性"这一新的知识宝库的把握程度.学科会聚背后是人才的会聚,而人才会聚时所释放出的凝聚力或离心力都远远大于一般素质的人员,因而除了科研群体的共同信念外,上述三个理论可以说也是处理科研群体人事关系的依据.此外,还必须有共同的跨文化的视野.因为学科的分化是在希腊及近代的西方文化语境下发生的,而学科的交叉与会聚已超出单一的语境.凝聚于一个群体的学者有不同的文化背景;作为研究对象的客体,有的涉及不同文化的价值认同(例如生命科学、环境问题).特别是人文社会科学或者人文社会科学与自然科学的交叉学科,有无跨文化的视野可以说是研究成败的关键因素之一.     

智能组卷中的试题难度评价建模

主要研究了网络考试系统设计中利用遗传算法进行智能组卷的问题．首先根据用户对组卷的要求,利用遗传算法对组卷所需的约束条件设置各项指标,利用矩阵理论建立有利于遗传算子进行组合交叉和变异的数学模型;再针对组卷问题中的一个重要约束条件——试卷的难度指标,采用模糊数学方法和项目反应理论对试题库中每一小题进行综合评价试题难度的数学建模,以准确确定每道小题的试题难度系数,最终为实现遗传算法全局寻优和智能搜索奠定基础．     

现代汉语副词“幸亏”的极端敏感性及允准条件研究

从句法分布、语义指向和语用前提三个方面描述了现代汉语副词"幸亏"的使用特点。在Giannakidou提出的极性词语在(非)真实性语境中得到允准的原则的基础上,对"幸亏"的允准条件进行了探讨。文章论证了"幸亏"具有极端敏感性,需要真实性算子对其进行允准,它的允准条件与肯定极性词一致。     

The silence of numbers: A split-sample experiment concerning respondents' linguistic sensitivity in Danish survey studies

This article presents, for the first time in English, findings from a Danish research project on language comprehension and memory as generators of measurement problems in sociological and other social-science survey studies. Utilizing survey questionnaires as instruments of measurements, the article deals with the linguistic sensitivity of Danish adults and the measurement problems it entails. The article uncovers the nature and extent of statistically significant response differences due to moderate linguistic changes. The article problematizes the trustworthiness of Danish social-science survey studies and provides evidence that respondents' answers to survey questions depend to a marked extent on the latter's wording. The empirical basis is a split-sample experiment in which 1900 respondents completed two versions of the 'same' questionnaire.