上海市S街道基层社区直接选举的调查

本文在肯定社区直选在趋势上的积极意义的前提下,从建设性的角度着重阐述了目前社区直选中存在的问题,对问题进行了原因分析,并试图提供解决问题的对策建议。     

流分类技术的研究

介绍了流分类算法的概念以及对流分类算法的要求;把目前存在的流分类算法分成三类:多维查找转换为一维查找算法、相关区域查找算法、独立区域查找算法,并对各类算法的性能进行了讨论;通过引入并行流分类算法说明了流分类算法的研究重点是减小存储空间和提高更新速度。     

会计电算化是特区会计的发展方向

会计电算化是会计发展史上的又一次重大革命。它的运用和推广,必将使传统会计工作的职能来一个较大的变革。本文详细介绍了会计电算的功能和作用,国内外会计电算化的发展状况,以及深圳特区会计电算化的现状和发展前景。     

Contesting Benevolence: Market Orientations among Muslim Aid Providers in Egypt

This paper studies the pro-market and communitarian tendencies among Egypt’s khayr (benevolence) organizations based on interviews with and observation of managers, staff and volunteers. Can the conflicting market and community orientations in the field of benevolence be interpreted as an instance of the “double movement” of marketization and protection against the market? The analyses demonstrate a growing tendency of marketization and only weak tendencies to transform established communitarian ways of giving into more systematic ways of non-marketized giving. Due to an emergent state-business-civil society nexus, market-oriented voluntary associations hold the potential to undermine or absorb the actually more entrenched communitarian associations. Potentials for a double movement in the era of neoliberalism seem to be weaker than in the classical liberal era because of the deeper permeation of society by market ethics.     

Using Inverse Probability Weighting Estimators to Evaluate Various Propensity Scores When Treatment Switching Exists

In this paper, we conduct a Monte Carlo simulation study to evaluate three propensity score (PS) scenarios for estimating an average treatment effect (ATE) in observational studies when treatment switching exists: (a) ignoring treatment switching in subjects (UPS), (b) removing subjects with treatment switching (RPS), and (c) adjusting for treatment switching effect (APS) with two inverse probability weighting estimators, IPW1 and IPW2. We evaluate these six estimators in terms of bias, mean squared error (MSE), empirical standard error (ESE), and coverage probability (CP) under various simulation scenarios. Simulation results show that the IPW2 estimator with RPS has relatively good performance.     

Confidence intervals for the first crossing point of two hazard functions

The phenomenon of crossing hazard rates is common in clinical trials with time to event endpoints. Many methods have been proposed for testing equality of hazard functions against a crossing hazards alternative. However, there has been relatively few approaches available in the literature for point or interval estimation of the crossing time point. The problem of constructing confidence intervals for the first crossing time point of two hazard functions is considered in this paper. After reviewing a recent procedure based on Cox proportional hazard modeling with Box-Cox transformation of the time to event, a nonparametric procedure using the kernel smoothing estimate of the hazard ratio is proposed. The proposed procedure and the one based on Cox proportional hazard modeling with Box-Cox transformation of the time to event are both evaluated by Monte–Carlo simulations and applied to two clinical trial datasets.     

闽浙赣交界地:地理枢纽与畲民族共同体的建构——以历史地理为视角

因为政治、经济等动因,从元开始,特别是明代以后,畲民从闽粤赣交界地陆续迁往了闽浙赣交界地。在六个世纪的长时段(longue dur啨e)里,闽浙赣交界地逐渐成了畲民的大本营。以历史地理的视角,回顾畲民的迁徙史,分析畲的谱系学,进而探讨清政府的畲民政策和畲汉之间的相对和谐的互动如何造就了畲民的诸多文化要素,可以认为,必须通过空间、时间和权力(power)的互动,才能更好地理解畲民族共同体的建构。     

基于投影深度的判别分析

用稳健的投影深度中位数代替样本均值,改进了多元正态分布下Bayes线性和非线性判别法;把投影深度引入到最大深度判别理论中,得到了基于投影深度的最大深度判别法,这种判别法对判别函数的形式和总体的概率分布都没有任何要求.模拟研究表明:新的判别方法相对Bayes线性和非线性判别法有着更强的稳健性.     

Li_2O含量对掺Er~(3+)碲酸盐玻璃光谱性质的影响

用高温熔融法制备了掺Er3的(85-x)TeO2-(10+x)Li2O-4.5TiO2-0.5Er2O3(x=0,5,10,15)玻璃样品,测试和分析了玻璃的热稳定性、吸收光谱、荧光光谱等.根据McCumber理论,计算了受激发射截面.结果表明:LizO的引入,显著的提高了受激发射截面,而较宽的荧光半高宽基本不变.当Li2O的含量为25m0l%时,带宽特性FWHM与σepeak的乘积具有最大值.     

Li2O含量对掺Er3+碲酸盐玻璃光谱性质的影响

用高温熔融法制各了掺Er3+的(85-x)TeO2-(10+x)Li2O-4.5TiO2-0.5Er2O3(x=0,5,10,15)玻璃样品,测试和分析了玻璃的热稳定性、吸收光谱、荧光光谱等.根据McCumber理论,计算了受激发射截面.结果表明:Li2O的引入,显著的提高了受激发射截面,而较宽的荧光半高宽基本不变.当Li2O的含量为25mol%时,带宽特性FWHM与σpeake的乘积具有最大值.