走出国有资产转让的三大认识误区

国有资产转让是国企改革的重要组成部分,其成败将直接影响、甚至决定国企改革的进程与结果。我们必须走出账面价值的认识误区,注重未来预期收益的“折现值”,走出资产流失的认识误区,注重资产流失与假资产流失之名行捣乱非流失资产转让之实的双重防范;走出否定国有资产转让的误区,充分意识因噎废食有可能拒一切转机于门外,而完善法规则可以亡羊补牢。     

初等r-循环矩阵的几个性质

给出了初等ｒ－循环矩阵可逆的充要条件及逆矩阵的表达式;对奇异的初等ｒ－循环矩阵给出了Ａ的一个ｇ－逆Ｇ（满足ＡＧＡ＝Ａ,ＧＡＧ＝Ｇ）及Ｍｏｏｒｅ－ｐｅｎｒｏｓｅ广义逆矩阵的表达式．     

试论"三个代表"与"人民代表"

"三个代表"是我们党的立党之本、执政之基、力量之源,也是新时期人大工作的指导思想."人民代表"(通称人大代表)是我国根本政治制度的基石和组成细胞,是实现"人民当家作主"和体现"一切权力属于人民"的社会主义民主的重要途径.在人大工作中,特别是在人民代表大会的代表制度建设中,落实"三个代表"的要求,是新时期所面临的新要求、新任务和新挑战.     

谈市场经济条件下城市粮食安全的预警保障问题

在实行粮食经济的市场化后 ,尽管国际、国内两个市场为解决粮食问题拓宽了空间 ,但是由于粮食商品的自然属性及战略属性 ,由于市场调节的自身缺陷 ,粮食供求矛盾激化、市场形势突变的情况不可避免。粮食短缺对国家和民族的危害不言而喻 ,确保粮食安全 ,维护国民的正常的生产生活秩序和社会稳定是地方行政当局必须考虑的问题     

The Relationship Between Wife’s Education and Husband’s Earnings: Evidence from 1960 to 2000

Previous research finds a positive relationship between a wife’s education and her husband’s earnings using data from the 1960s. Earlier theories suggest that benefits accrue from informational sharing between partners in a marriage. This paper tests the hypothesis that a wife’s education is positively associated with her husband’s earnings, using data from the 1960, 1970, 1980, 1990, and 2000 Censuses. Between 1960 and 2000, the educational attainment and labor-force participation of married women has increased dramatically. As women have embarked upon their own careers, has their education continued to be positively associated with their husbands’ earnings? Yes. The coefficient of the wife’s education remains positive and significant for all the years under study. The size of the coefficient decreases, however, from 1960 to 2000.     

Restricted most powerful Bayesian tests for linear models

Uniformly most powerful Bayesian tests (UMPBTs) are a new class of Bayesian tests in which null hypotheses are rejected if their Bayes factor exceeds a specified threshold. The alternative hypotheses in UMPBTs are defined to maximize the probability that the null hypothesis is rejected. Here, we generalize the notion of UMPBTs by restricting the class of alternative hypotheses over which this maximization is performed, resulting in restricted most powerful Bayesian tests (RMPBTs). We then derive RMPBTs for linear models by restricting alternative hypotheses to g priors. For linear models, the rejection regions of RMPBTs coincide with those of usual frequentist F‐tests, provided that the evidence thresholds for the RMPBTs are appropriately matched to the size of the classical tests. This correspondence supplies default Bayes factors for many common tests of linear hypotheses. We illustrate the use of RMPBTs for ANOVA tests and t‐tests and compare their performance in numerical studies.     

HIV-1gp41NHR序列靶点专一性的荧光共振能转移测定

目的确定并利用荧光共振能转移法（FRET）对以HIV-lgp41N端七联重复序列（NHR）为靶点的融合抑制剂进行筛选和作用机制研究。方法FRET采用金属络合物多肽技术设计针对不同结合位点、结合强度可调、涵盖全部NHR序列的靶点和探针,对HIV融合抑制剂进行高通量筛选。由于HIV在进行膜融合时其gp41的N端NHR和C端CHR可形成稳定的六螺旋结构,因此,利用圆二色谱仪对FRET所使用的靶点／探针对的结合强度进行验证,确定对应的靶点／探针对可形成稳定的六螺旋结构;同时,借助细胞活性测试测定抑制荆的活性,验证FRET是否可用于筛选以HIV-1gp41NHR为靶点的抑制剂。结果与结论FRET中使用的靶点／探针均可形成螺旋度较高的六螺旋结构,其中Fe（Env2．0）,／CP2及Fe（Env5．0）,／CP5形成的01．螺旋度分别高达89．6％和84．7％。FRET所使用的靶点／探针对专一性强、结合作用强,可用于进行HIV一1融合抑制剂的筛选和机制研究。     

A Data-Analytic Look at Skewness and Elongation in Common-Stock-Return Distributions

This article explores the nature of skewness and elongation in daily common-stock-return distributions of individual firms using estimates of g (for skewness) and h (for elongation) obtained from Tukey's g and h distributions. Both parametric and nonparametric (bootstrap) estimates of standard errors of the g estimates are computed and compared. Daily return distributions are first examined cross-sectionally over a large sample of firms. The estimates of the skewness parameter exhibit variation across individual firms, but some general trends are evident across industry groups and firm sizes. Return distributions typically seem to be more elongated than the Gaussian distribution. From a time series perspective, both skewness and elongation are persistent in the return distributions of individual firms and vary over a finite range. First-order autocorrelation coefficients of monthly g and h estimates are large and suggest a certain degree of predictability.     

论高校体育教学中的创新教育

创新是 2 1世纪中国人才培养目标的重大改革走向 ,是社会发展赋予高等教育的历史使命。为达此目标 ,以“教师中心、教材中心、考试中心”为基本特征的传统教学已远远不适应当前高校教育改革的需要 ,而以“学生中心、能力中心、活动中心”为标志的创新教学必将大行其道     

“农业机械学”教学改革初探

根据21世纪对人才的需求,重新确定了农业机械化及其自动化专业的培养目标,突破了传统的以机械为主的狭窄口径,构建了培养复合型人才的培养模式.为此,作为主干课程之一的"农业机械学"课程的教学必须根据科技发展和社会需求,建立适应培养创新人才的课程内容体系;采用适宜的教学方法和手段如采用启发式教学,开展课堂讨论,注重理论教学与实践教学的有机结合,应用现代化教学手段,实行开放式教学;改革传统的考核方法,变单一考试为笔试--技能考核--论文撰写相结合.从而,强调综合素质的提高,促进学生全面发展.