N-硝基-N-氨基(取代)甲酰-2,4,6-三氯苯氨类化合物的合成

合成了两种新型兼有植物生长调节剂和除草剂功效的N硝基 -N -氨基 (取代 )甲酰 - 2 ,4 ,6 -三氯苯氨类化合物 ,并经元素分析、红外光谱等证实了它们的结构 .     

"祝颂"言语行为的汉英对比

汉英“祝颂”言语行为及“祝颂语”在词汇、句法、语体、语境、话语结构和文化背景等方面均存在共性与差异。实施“祝颂”言语行为时常出现“语用语言失误”和“社交语用失误” ,其根源在于文化差异 ,即英美文化的基督教信仰、个体主义、自我价值和汉文化的贬己尊人等传统观念之间的差异。     

On Rao score and PearsonX 2 statistics in generalized linear models

The identity of the Rao score and PearsonX ² statistics is well known in the areas where the latter was first introduced: goodness-of-fit in contingency tables and binary responses. We show in this paper that the same identity holds when the two statistics are used for testing goodness-of-fit of Generalized Linear Models. We also highlight the connections that exist between the two statistics when they are used for the comparison of nested models. Finally, we discuss some merits of these unifying results. Work financially supported by cofin. MIUR grants 2000 and 2002.     

北仑区政协提案工作的新做法

文章从加大提案工作宣传力度、加大领导力度、加大督办力度三方面总结了近年北仑区政协提案工作的新做法、新举措     

高羊茅愈伤组织的诱导与内源激素含量研究

该利用高羊茅种子的离体成熟胚作体植体接种到2，4-D浓度梯度的培养基上进行了愈伤组织诱导，发现2.5mg/L2,4-D是愈伤组织的最佳诱导生长激素，同时利用反相高效液相色谱法测定了愈伤组织和相应的黄化种子苗中的内源激素赤霉酸（GA3），玉米素（ZT），吲哚乙酸（IAA），脱落酸（ABA），吲哚丁酸（IBA）的含量，发现胚性愈伤组织的内源激素（EC）比非胚性愈伤组织（NEC）总含量要高，各种激素在两种愈伤组织与黄化种子苗中的比例也与献报道的相似。     

浅谈现代汉语N1+N2同位结构

形式和意义的关联性是分析现代汉语Nl N2同位结构的关键.意义的差异是形式差异得以存在的理由,同位结构的组配关系很大程度上是由意义类别决定的,而所谓的同位不但存在并立性而且还具有一定的修饰关系.人类对客观世界的认识角度会影响到此结构的组配,这种认识来源于社会文化的差异及个人的认知凸现能力.同时N1 N2同位结构和定中结构之间存在一定的纠缠,消除纠缠的方法建立在对结构内部变元成分套累情况的认识上.     

浅析数字化校园及其应用系统的构建

数字化校园是在高等教育信息化快速发展过程中出现的一个崭新概念。本文介绍了数字化校园的内涵、数字化校园建设的主要内容,分析和评价了一些构建数字化校园应用系统的技术,对目前正在兴起的数字化校园建设具有一定的参考意义。     

Estimating ordered parameters by linear programming

There are many models that require the estimation of a set of ordered parameters. For example, multivariate analysis of variance often is formulated as testing for the equality of the parameters versus an ordered alternative. This problem, referred to as isotonic inference, constrained inference, or isotonic regression, has led to the development of general solutions, not often easy to apply in special models. In this expository paper, we study the special case of a separable convex quadratic programming problem for which the optimality conditions lead to a readily solved linear complementarity problem in the Lagrange multipliers, and subsequently to an equivalent linear programming problem, whose solution can be used to recover the solution of the original isotonic problem. The method can be applied to estimating ordered correlations, ordered binomial probabilities, ordered Poisson parameters, ordered exponential scale parameters, or ordered risk differences.     

A graphical summary of disparities in health care and related summary measures

In order to assess the effectiveness of government programs designed to reduce disparities in the health care minority groups receive relative to the majority white population, a proper statistical measure should be used. This article proposes a measure of and its accompanying graph, which is readily interpretable and is not affected by the number of minority subgroups examined.     

Almost Consistent Estimation of Panel Probit Models with “Small” Fixed Effects

We propose four different GMM estimators that allow almost consistent estimation of the structural parameters of panel probit models with fixed effects for the case of small Tand large N. The moments used are derived for each period from a first order approximation of the mean of the dependent variable conditional on explanatory variables and on the fixed effect. The estimators differ w.r.t. the choice of instruments and whether they use trimming to reduce the bias or not. In a Monte Carlo study, we compare these estimators with pooled probit and conditional logit estimators for different data generating processes. The results show that the proposed estimators outperform these competitors in several situations.