Any complete preference structure without circuit admits an interval representation

This article proves that all complete preference structures where the strict preference relation (P) has no circuit admit a representation by intervals of the real line; the rule for deciding whether an interval is indifferent or preferred to another is less straightforward than for interval orders: strict preference is indeed compatible with a certain degree of overlapping of intervals, the allowed degree being specified by means of a so-called tolerance function.     

Wi-Fi网络安全威胁及其解决途径

互联网上已经有很多关于Wi-Fi网络安全的防范方法。但很多都是基于网络用户端的设置，对其安全机理也很少涉及。本文从危险来源出发，阐述了危险形成的机理，并提出了相关的安全防范建议。     

多环芳烃的性质与拓扑指数的关系研究 (Ⅰ)二阶连接性指数~2x与分配系数K_(ow)的相关性

提出了多环芳烃的分配系数 (Kow)与其二阶连接性指数 ( 2 x)之间的定量关系方程 ,估算了 4 2个多环芳烃的Kow,估算值与实验值吻合 ,相关系数R =0 .991 4 .     

上海市外来从业人员参加综合保险意愿调查

83 %的上海市外来从业人员认为《上海市外来从业人员综合保险暂行办法》保障了他们的权益 ,但只有 5 8 7%的人愿意参加该综合保险。通过x2 检验 ,影响参加综合保险的因素主要有性别、文化程度、职业、收入水平、在沪已经工作年限、在沪工作年限意愿和对保险的了解程度等。外来从业人员最希望得到的保障是养老保险 ,险种偏好与职业、文化程度相关 ,而与收入等因素无关。外来从业人员保险应该反映参保人员的意愿 ,分层分类建立保险体制     

On constructing T 2 control charts for retrospective examination

In this paper we consider the issue of constructing retrospective T ² control chart limits so as to control the overall probability of a false alarm at a specified value. We describe an exact method for constructing the control limits for retrospective examination. We then consider Bonferroni-adjustments to Alt's control limit and to the standard x ² control limit as alternatives to the exact limit since it is computationally cumbersome to find the exact limit. We present the results of some simulation experiments that are carried out to compare the performance of these control limits. The results indicate that the Bonferroni-adjusted Alt's control limit performs better that the Bonferroni-adjusted x ² control limit. Furthermore, it appears that the Bonferroni-adjusted Alt's control limit is more than adequate for controlling the overall false alarm probability at a specified value.     

我国城镇居民旅游兴趣统计分析

文章依据我国城镇居民旅游兴趣抽样数据,运用列联分析中X~2检验和对数线性模型效应分析理论。对我国城镇居民旅游兴趣分年龄、经济收入、文化程度进行定量分析,据此提出一些建议。     

人口流动与乾嘉时期新疆煤矿业的兴起和发展

清朝统一新疆之后,随着新疆城乡建设的发展和内地人口向新疆的不断流动,新疆尤其是北疆各地的煤矿业得到了较快的发展,不仅方便了新疆各族军民的生产生活,而且对于新疆社会经济的发展也有积极的促进作用。本文主要根据清代满、汉档案,并结合其他相关文献,以内地人的活动为中心,对乾嘉时期新疆煤矿业的兴起和发展予以了论述。     

An integral representation technique for calculating general multivariate probabilities with an application to multivariate x2

Recently in Dutt (1973, (1975), intgral representations over (0,A) were obtained for upper and lover multivariate normal and the probilities. It was pointed out that these integral representaitons when evaluated by Gauss-Hermite uadrature yield rapid and accurate numerical results.

Here integral representaitons, based on an integral formula due to Gurland (1948), are indicated for arbitrary multivariate probabilities. Application of this general representaion for computing multivariate x2 probabilities is discussed and numerical results using Gaussian quadrature are given for the bivariate and equicorre lated trivariate cases. Applications to the multivariate densities studied by Miller (1965) are also included     

Goodness-of-fit tests of hypothesized canonical variables

In the literature goodness-of-fit tests for canonical variables are available either in the x space or in the y space, see e.g., Bartlett (1951), Kshirsagar (1971, 1972), Radcliffe (1968), and Williams (1952). Here we present goodness-of-fit tests for canonical variables in both the x and y spaces. The results appear as extensions of the results of the above authors.     

论国际法向成文法发展之趋势

20世纪以来,国际法向成文法发展的趋势日益明显.这一趋势产生的原因,主要在于作为成文法的国际条约及其造法方式更能满足国际社会和国际法发展的需要.国际法的成文化的发展符合国际社会发展的一般趋向,国际条约取代国际习惯成为国际法的关系渊源.是国际社会发展到一定阶段的必然结果.然而国际法向成文法的发展仍特是一个学长的.也许是永无止境的过程.