Profile empirical likelihood for parametric and semiparametric models

This paper introduces a profile empirical likelihood and a profile conditionally empirical likelihood to estimate the parameter of interest in the presence of nuisance parameters respectively for the parametric and semiparametric models. It is proven that these methods propose some efficient estimators of parameters of interest in the sense of least-favorable efficiency. Particularly, for the decomposable semiparametric models, an explicit representation for the estimator of parameter of interest is derived from the proposed nonparametric method. These new estimations are different from and more efficient than the existing estimations. Some examples and simulation studies are given to illustrate the theoretical results. The first author is supported by NNSF projects (10371059 and 10171051) of China. The second author is supported by a grant from The Research Grants Council of the Hong Kong Special Administrative Region, China (#HKU7060/04P). The third author is supported by the University Research Committee of the University of Hong Kong and a grant from the Research Grants Council of the Hong Kong Special Administrative Region, China (Project No. HKU7323/01M).     

Copper-D-penicillamine complex as potential contrast agent for MRI.

In vitro and in vivo proton T1 data are reported that demonstrate that the paramagnetic copper-D-penicillamine complex can be applied as a potential contrast agent to magnetic resonance imaging.     

A family of centered forms for a polynomial

The general centered form for multi-variate polynomials is investigated and a computing procedure is proposed that results in a certain superset. Based on this procedure the optimal centered forms for monomials and for some special cases of polynomials are investigated.     

金属间化合物Ni3Al中的硼晶界偏聚特性的AES研究

本文应用俄歇能谱仪研究了不同化学计量比ＮｉＡｌ金属间化合物硼在晶界偏聚的特性。研究结果表明：硼在Ｎｉ３Ａｌ的各个晶界偏聚存在着不均匀性，硼在晶界的偏聚范围只有几个原子层，晶界结构及晶界化学环境是影响在晶界偏聚的决定因素。     

新型齿圈式切焦机在焦炭整粒中的应用

摘要：阐述了焦炭整粒在高炉冶炼中的必要性和重要性。针对临钢双齿辊切焦机的缺点进行了改造，研制出了CQD-80型齿圈式切焦机，介绍了CQD-80型齿圈式切焦机设备构造及改进，CQD-80型切焦机使用情况说明，其性能安全可靠，效果显著。     

The Fundamental Experiments of Red Tide Chemical Forecast

Many food algae and red tide algae were cultivated in the f/2 medium, and the nitric oxide (NO) concentration of the medium and the cell density were determined. The experiments on algae were conducted when different concentrations of NO were added into the medium using two methods. The results show that low concentrations of NO were self-produced by marine algae during the exponential growth period and were about nmol/L level. But at the end of the period, i.e., 2 or 3 days before the cell density reaches the maximum, an NO peak appeared, with the NO concentration reaching 10 nmol/L. The NO threshold concentration exists according to the influence of exogenous NO on the marine phytoplankton growth. One type is the threshold concentration that can promote algae growth, and its value is between 10 and 1 nmol level, or even lower. The other type can inhibit the phytoplankton growth, which is about μmol level or higher. The results indicate that red tide algae are far more sensitive to NO than are food algae. The fundamental experimental outcome above may provide a new clue for red tide chemical forecast by inspecting the NO change.     

酵母原生质体形成中的电镜观察

用蜗牛酶处理对数期啤酒酵母和异常汉逊酵母细胞,可以有效地从中分离到原生质体透射电镜观察证明了细胞中周质体的存在,揭示了酵母原生质体的释放机理和蜗牛酶的作用位点。     

关于Echelon空间无穷矩阵变换集的有界性

无穷矩阵变换是研究序列空间理论的重要工具.研究一个空间到另一个空间无穷矩阵变换的形式,是序列空间理论中的重要内容,并且已有众多工作.本文将进一步研究一般的Echelon空间到空间l^p(1≤p≤∞),c、c₀的无穷矩阵变换集的有界性.所得结果的特例正是Echelon空间到l^p(1≤p≤∞)c、c₀无穷矩阵变换的形式,同时概括了前人的许多结果.     

结构动力分析一种简易的直接积分法

本文利用方块脉冲函数优良的运算性质,提出一种结构动力分析简易的直接积分法——方块脉冲函数法,具有无条件稳定的积分格式,并表明方法的可行和有效.     

两向斜放类与三向钢筋混凝土空腹网架的分析方法

本文是在文[1]、[2]、[3]基础上的推广与发展,即用柔度法对正交斜放与三向钢筋混凝土空腹网架进行内力分析。在工程实例申提出一种新的装配整体式钢筋混凝土空腹网架结构,并和五种屋盖的结构形式进行分析比较,证明此类结构将更节约建筑用材和降低工程造价。