百万以上少数民族老龄化程度的分层测算

老龄化是当今面临的一大社会问题。通常老龄化的界定主要采用老年人口占比这一指标来量化。以发展的视角与人口年龄结构划分标准而言．单一指标的老龄化论断削弱了学术的严谨性和对现实的指导性。为精确各个族群老龄化的差异,以发展的视角分析出台减缓老龄化进程的相关策略．使区域经济发展与老龄化进程趋向协调．本文基于第四、五、六次人口普查数据资料．对百万以上18个少数民族的老龄化程度进行新的分层测算。在分析其老龄化现状的基础上。给出1990年、2000年、2010年三个时段的年龄结构类型．分层测算了18个民族20年间年龄结构类型或老龄化进程的速度和差异．为国家制定分层策略提供数据化支撑,     

事业单位固定资产减值情况分析

为顺利进行业务活动,事业单位必须拥有一定量的固定资产。在对部分事业单位固定资产价值管理调查中发现,虽然单位财务管理体制规范,会计核算的账簿体系设置也较完善,但仍然存在着严重固定资产账实不符的现象。究其原因,有管理的不足,更有制度的不完善。因此,事业单位除建立适宜的财务管理体制、建立健全固定资产管理制度、建立健全固定资产的账簿核算体系以外,还要提高实物负责人和卡片管理人的业务素质,增强其管理意识,转变观念,创新管理,提高事业单位固定资产的使用效率,进一步完善事业单位会计核算办法,提高事业单位会计信息质量。     

拉伸法测杨氏模量实验方法的改进

改进拉伸法测量杨氏模量的实验方法,用游标卡尺测量金属丝承重时的伸长量,改变传统的实验方法,简化测量装置,提高测量精度.     

The severity of ruin in a discrete semi-Markov risk model

In this paper we introduce a discrete time semi-Markov risk model. We derive a recursive system for finding the probability of ruin and the distribution of the severity of ruin in a particular case where the annual result may be positive only in years beginning in some given state.     

Gamma-Generalized Inverse Gaussian Class of Distributions with Applications

In this article, a new family of probability distributions with domain in ?⁺ is introduced. This class can be considered as a natural extension of the exponential-inverse Gaussian distribution in Bhattacharya and Kumar (1986 Bhattacharya , S. K. , Kumar , S. ( 1986 ). E-IG model in life testing . Calcutta Statist. Assoc. Bull. 35 : 85 – 90 . [Google Scholar]) and Frangos and Karlis (2004 Frangos , N. , Karlis , D. ( 2004 ). Modelling losses using an exponential-inverse Gaussian distribution . Insur. Math. Econo. 35 : 53 – 67 .[Crossref], [Web of Science ®] , [Google Scholar]). This new family is obtained through the mixture of gamma distribution with generalized inverse Gaussian distribution. We also show some important features such as expressions of probability density function, moments, etc. Special attention is paid to the mixture with the inverse Gaussian distribution, as a particular case of the generalized inverse Gaussian distribution. From the exponential-inverse Gaussian distribution two one-parameter family of distributions are obtained to derive risk measures and credibility expressions. The versatility of this family has been proven in numerical examples.     

电化教学闭路电视系统前端部分的设计

从实用的角度出发 ,概述了电化教学闭路电视系统前端部分的设计思路 ,从频道设置、线路设计、电平计算、设备选型等方面具体阐述了电化教学闭路电视系统前端设计的基本概念和方法。该系统方案可作为一般学校设计电化教学闭路电视系统时的参考     

Combining evidence from clinical trials in conditional or accelerated approval

Conditional (European Medicines Agency) or accelerated (U.S. Food and Drug Administration) approval of drugs allows earlier access to promising new treatments that address unmet medical needs. Certain post-marketing requirements must typically be met in order to obtain full approval, such as conducting a new post-market clinical trial. We study the applicability of the recently developed harmonic mean ${\chi }^2$-test to this conditional or accelerated approval framework. The proposed approach can be used both to support the design of the post-market trial and the analysis of the combined evidence provided by both trials. Other methods considered are the two-trials rule, Fisher's criterion and Stouffer's method. In contrast to some of the traditional methods, the harmonic mean ${\chi }^2$-test always requires a post-market clinical trial. If the $p$-value from the pre-market clinical trial is $\ll 0.025$, a smaller sample size for the post-market clinical trial is needed than with the two-trials rule. For illustration, we apply the harmonic mean ${\chi }^2$-test to a drug which received conditional (and later full) market licensing by the EMA. A simulation study is conducted to study the operating characteristics of the harmonic mean ${\chi }^2$-test and two-trials rule in more detail. We finally investigate the applicability of these two methods to compute the power at interim of an ongoing post-market trial. These results are expected to aid in the design and assessment of the required post-market studies in terms of the level of evidence required for full approval.     

电算化对会计理论和实务的影响

本文论述了会计电算化在实践工作中所发挥的作用 ,并针对在操作实践过程中产生的舞弊现象提出了相应的防范措施