机载脊喇叭天线辐射特性分析

基于一致性几何绕射理论分析飞机机体结构对安装在机背上的双脊喇叭天线辐射特性的影响,分析了机载双脊喇叭天线各辐射场分量的计算方法,计算了天线经简化机体散射后的方向图。仿真实验结果表明,机体对天线辐射特性的影响主要在机身表面的反射、结构边缘的绕射,而表面爬行波对天线方向图主瓣的影响非常小,其影响主要在后瓣。计算结果可为天线安装后辐射性能预测和最优化配置提供理论依据。     

Certain Inverse Multivariate Hypergeometric and Multinomial Distributions

A sample is drawn from a population in such a way that it contains at least certain numbers from certain of its subpopulations. This paper obtains the frequency function of the number of units in the sample and its distribution over the subpopulations, and suggests some applications.     

确定溶液配合物顺反异构体构型的新方法

本文首次提出了确定溶液含二齿配体的配合物几何顺反异构体构型的新方法,定义了三元配合物MLL′(或ML_2)中ML与ML′(或ML)二跃迁偶极矩分向量之间的夹角θ,作为该配合物中配体L与L′(或L)之间几何因子的量度,当θ≤90°,为顺式异构体;当θ≥120°,为反式异构体;当90°<0<120°,居于顺反异构体之间。我们把单齿配体配合物顺反异构体的定义推广到含两个二齿配体的配合物。而且对配合物内配体之间的空间相对位置作了近似定量化的描述。     

Multidimensional scaling models with inequality and equality constraints

Recently, a lot of attention has been brought to constrained estimation theory in multidimensional scaling models. So far, only equality constraints have been thoroughly studied. In this paper, the optimization theory is extended to general multidi-mensional scaling models with both inequality and equality constraints. A Newton-Raphson based algorithm is developed to produce the constrained least squares estimate. To illustrate the theory, some classical color data are reanalyzed in the context of the linear Euclidean distance model.     

安全区域内的最优投资决策问题

本文讨论了一类安全区域内的最优证券组合问题, 给出了投资者为了使自己的财富在尽可能短的时间内达到预定的目标财富所应采取的最优控制策略,并且针对具体的目标财富值及金融市场参数进行了数据分析,得出了为获得既定目标财富所需平均时间的最小值.     

Human Motivation in Question: Discussing Emotions,Motives, and Subjectivity from a Cultural‐Historical Standpoint

Vygotsky, at the end of his life, advanced a new representation of a psychological system that was ruled by a cognitive‐emotional unity, a theorization that remains inconclusive due to Vygotsky's early death. This article discusses the advances made by Vygotsky in the comprehension of human motivation through his concepts of sense and perezhivanie at the end of his work. Through these concepts, he further advanced the discussion of motivation, despite the fact that these concepts have only very recently been considered a relevant part of his legacy in both Russian and Western psychology. This paper discusses the departure from and the historical presentations of the concept of motive in the following two main approaches of Soviet psychology that were mistakenly equated in Western interpretations: Vygotsky's approach, mainly at the first as last moment of his work, and Leontiev's Activity Theory. Based on the final theoretical positions of Vygotsky and of other Soviet authors, and further developing this legacy, this article proposes a new definition of motivation as a specific quality of subjectively configured systems and defines motive as intrinsic to the functioning of all psychological function defines subjective functions as subjectively configured processes. This new proposal of human motivation within a new way of defining subjectivity defines new categories as subjective senses and subjective configurations on which the author bases a specific approach for advancing the topic of subjectivity and motivation within a cultural‐historical framework.     

Indifference-zone ranking and selection: confidence intervals for true achieved P(CD)

In this paper we present procedures which attempt to allow experimenters to take at least partial advantage of more-favorable configurations of the population parameters (without, in the process, sacrificing precise probability statements about the inferences made) by obtaining confidence intervals for the true probability of a correct decision, regarded as a function of the true unknown underlying parameter values.     

Labour market regulations and high quality employment in EU-15 countries

The elements that we usually include under the concept of “labour market institutions” exert a clear influence on the workings of the labour market. However, the assessment of labour market policies and institutions remains mostly focused on their impact on the quantity of jobs, while people’s well-being depends crucially on how good their jobs are. This paper is a modest attempt to contribute some evidence and insight to the debate on the effects that particular institutional configurations have on the generation of high-quality employment.     

Learning from suppliers: a framework for operation innovation in small and medium sized enterprises

Abstract

Inter-firm learning though partnering with suppliers is often considered as a relatively cheap way to develop the knowledge necessary for innovating operations procedures. SMEs may benefit, especially from the inflow of information, as they face multiple restrictions on innovating manufacturing or delivery processes due to their small size and limited resources. Based on the two studies – a logistic regression analysis and a configuration analysis – evidence was found that small- and medium-sized enterprises (SME) need to integrate knowledge sources in distinct knowledge configurations. In particular, it is shown that an operation process innovation (OPI) strategy for SME is incomplete if it does not find a way to combine internal and external knowledge to innovate operation procedures. The main contribution of this paper is to uncover the precise composition of effective knowledge configurations, which leads to innovation.