企业技术创新的知识产权保护

技术创新是企业按照市场需求将科技成果转化为商品并首次实现其商业价值的动态过程。知识产权保护制度对企业技术创新和经济发展具有巨大推动作用。企业可以根据自身特点采取不同的技术创新模式, 在技术创新的不同阶段利用不同的知识产权保护方式。     

经济责任审计中存在的问题及对策

本文从我国经济责任审计工作的发展历程,现阶段经济责任审计工作中存在的主要问题,论述了如何搞好经济责任审计工作,即准确定位、规范行为、加强协调、重视审计成果利用等.     

社区安全与环境设计--在"可防卫空间"之后

社区犯罪历来都被认为与社区实质环境之间存在直接的关系,本文回顾了近40年来与社区安全有关的环境行为研究后发现,可防卫空间、建筑规模、土地使用和空间结构等实体要素与犯罪和居民的安全感之间有密切联系,它们的关系是复杂的多层次的,而且还受到了社区的社会结构、认知和管理等多方面的影响。     

一集新的等面积伪圆柱投影

为了应用于世界地图的编制,本文提出一集新的等面积伪圆柱投影.     

房地产抵押制度研究

房地产抵押，是当前我国房地产市场的一个热点。本文试图揭示房地产抵押的主体、客体、特征、方式，以及估价、清偿、再抵押等诸多的法律问题，从不同的角度进行了理论探索，并对如何进一步完善房地产抵押制度提出立法的思考。     

21世纪的美国社会保障:趋势与借鉴

美国社会保障的未来趋势是：预期寿命延长、劳动力数量增长缓慢、退休人数增加、退休年龄不断提前，这些共同加剧了社会保障收支不平衡状况，企业成为社会保障的生力军，社会保障事业出现私有化和私营化苗头。其借鉴意义：重视预期寿命延长对社会保障的压力，及早为延长退休年龄做好准备工作，重新定位企业在社会保障制度中的地位，改善社会保障的管理工作。     

Sampling Strategies for Toxic Air Contaminants

Annual concentrations of toxic air contaminants are of primary concern from the perspective of chronic human exposure assessment and risk analysis. Despite recent advances in air quality monitoring technology, resource and technical constraints often impose limitations on the availability of a sufficient number of ambient concentration measurements for performing environmental risk analysis. Therefore, sample size limitations, representativeness of data, and uncertainties in the estimated annual mean concentration must be examined before performing quantitative risk analysis. In this paper, we discuss several factors that need to be considered in designing field-sampling programs for toxic air contaminants and in verifying compliance with environmental regulations. Specifically, we examine the behavior of SO2, TSP, and CO data as surrogates for toxic air contaminants and as examples of point source, area source, and line source-dominated pollutants, respectively, from the standpoint of sampling design. We demonstrate the use of bootstrap resampling method and normal theory in estimating the annual mean concentration and its 95% confidence bounds from limited sampling data, and illustrate the application of operating characteristic (OC) curves to determine optimum sample size and other sampling strategies. We also outline a statistical procedure, based on a one-sided t-test, that utilizes the sampled concentration data for evaluating whether a sampling site is compliance with relevant ambient guideline concentrations for toxic air contaminants.     

On the asymptotic normality of the L1- and L2-errors in histogram density estimation

The L₁ and L₂-errors of the histogram estimate of a density f from a sample X₁,X₂,…,Xn using a cubic partition are shown to be asymptotically normal without any unnecessary conditions imposed on the density f. The asymptotic variances are shown to depend on f only through the corresponding norm of f. From this follows the asymptotic null distribution of a goodness-of-fit test based on the total variation distance, introduced by Györfi and van der Meulen (1991). This note uses the idea of partial inversion for obtaining characteristic functions of conditional distributions, which goes back at least to Bartlett (1938).     

矩阵非奇异性判定

本文利用矩阵块对角占优的性质,给出矩阵非奇异的一个判定条件