构建和谐社会:对近代中国三大乌托邦的否定

中国近代史上,农民阶级、资产阶级维新派和革命派提出了各自的社会发展主张,如太平天国制定的《天朝田亩制度》,康有为企求的“大同世界”,孙中山提出的以“平均地权”为主要内容的民生主义,这些主张实际上只能是乌托邦。以胡锦涛为核心的党中央提出了蕴涵更加丰富、更加准确、更加稳定的社会治理目标和社会理想———构建社会主义和谐社会。这是对时代的超越,是符合中国国情的历史选择。     

证券交易价格时间平均数的计算及其影响因素

目前证券市场交易价格常以期末数(年末数)代表这一年的交易价格是不够合理的。本文提出一个新的数量指标──证券交易价格的时间平均数,用以代表一段时间内的交易价格。通过与其它各类交易价格指标相比,说明它的合理性。并分析了影响交易价格时间平均数变动的各主要因素。     

The Effects of Average Fundamental Frequency and Variance of Fundamental Frequency on Male Vocal Attractiveness to Women

This paper employs a cue synthesis experimental method to examine the effects of pitch and intonation on male vocal attractiveness to women. Voices were acoustically manipulated to yield nine combinations of three levels of average fundamental frequency and three levels of variance of fundamental frequency. Strong main effects were obtained for the average fundamental frequency manipulation, with high voices rated as significantly less attractive to women than either medium or low voices, which do not differ in attractiveness. The main effects of manipulations of variance of fundamental frequency on vocal attractiveness and benevolence did not reach significance, but there was a significant interaction on the benevolence factor, with high or low average fundamental frequency manipulations being rated particularly low for voices with low variance of fundamental frequency.     

再论统计平均数大小关系的证明及其推广

一、引言统计平均数是统计分析和一般经济分析中广泛运用的指标形式,在统计学中有重要的地位。统计平均数按代表意义和计算方式的不同,可以分为数值平均数和位置平均数,其中常用的数值平均数有算术平均数(-X)、几何平均数(G)和调和平均数(H),三者源于同一个家族———幂平均数(     

对"代表先进文化前进方向"的几点认识

本文结合十六大精神的学习,围绕对先进文化的理解、先进文化与经济水平的关系、先进文化的前进方向等问题提出一些自己的认识和看法。     

城市公交站点网络拓扑性质分析

城市公共交通系统可用复杂网络来表示并在此基础上对其进行研究的。通过引入复杂网络分析中一些常见的重要拓扑参数例如度分布、平均路径长度、聚类系数和介数等来对城市公交系统进行分析,以西安市公交系统为例,计算并分析了这些拓扑参数,并从交通工程的角度对这些拓扑参数的具体意义进行了研究,最后从城市公交规划和环保的角度为城市公交系统的建设提出了一些建议。     

Filtration of ASTA: a weak convergence approach

Consider a stochastic process (X,A), where X represents the evolution of a system over time, and A is an associated point process that has stationary independent increments. Suppose we are interested in estimating the time average frequency of the process X being in a set of states. Often it is more convenient to have a sampling procedure for estimating the time average based on averaging the observed values of X(T_n) (T_n being a point of A) over a long period of time: the event average of the process. In this paper we examine the situation when the two procedures—event averaging and time averaging—produce the same estimate (the ASTA property: Arrivals See Time Averages). We prove a result stronger than ASTA. Under a lack-of-anticipation assumption we prove that the point process, A, restricted to any set of states, has the same probabilistic structure as the original point process. In particular, if the original point process is Poisson the new point process is still Poisson with the same parameter as the original point process. We develop our results in the more general setting of a stochastic process (X,A), that is, a process with an imbedded cumulative process, A={A(t),t0}, which is assumed to be a Levy process with non-decreasing sample paths. This framework allows for modeling fluid processes, as well as compound Poisson processes with non-integer increments. First, we state the result in discrete time; the discrete-time result is then extended to the continuous-time case using limiting arguments and weak-convergence theory. As a corollary we give a proof of ASTA under weak conditions and a simple, intuitive proof of (Poisson Arrivals See Time Averages) under the standard conditions. The results are useful in queueing and statistical sampling theory.     

抗战时期的高校内迁对中国高校地域性发展的影响

中国高等教育从产生之初就显现了它在地域分布上的不均衡性。抗战时期出现的高校内迁,是中国在高校分布上的一次重大调整,它改变了战前高校东多西少的局面,对战后中国高校地域分布的均衡性发展产生了重大影响。这次高校内迁对当前中国推进西部高等教育发展有一定的启示。     

短跑途中跑教学的新探索

途中跑教学是短跑技术教学的重点,随着短跑技术的发展,途中跑教学必须改变传统的教学模式和观念,以现代短跑技术的理论指导教学,注重抓好关键技术、改进辅助练习、运用条件作业、改革教学方法、发展绝对速度、善于纠正错误等六个环节教学。     

A Multivariate Unit Root Test Based on the Modified Weighted Symmetric Estimator for VAR(p)

Multivariate unit root tests for the VAR model have been commonly used in time series analysis. Several unit root tests were developed. Most of the estimators of coefficient matrices developed in the VAR model are obtained using ordinary least squares estimators. In this paper, we suggest a multivariate unit root test based on a modified weighted symmetric estimator. Using a limited Monte Carlo simulation, we compare the powers of the new test statistic and the test statistic suggested in Fuller (1996).