钢框架柱的设计规范比较(一):设计方法

对现行钢结构设计规范,包括中国规范(GB50017—2003)、美国规范(LRFD)、欧洲规范(EC3)和香港标准(HKC),进行了较详尽的比较,讨论了梁柱设计的各种原理和流程,总结了各规范设计方法的相似性与不同点。LRFD只利用一个验算方程来设计框架柱,而其他三种规范均需进行截面承载力、平面内稳定和平面外稳定承载力验算。比较发现,四种规范或标准各有优缺点,没有哪一种规范在各个方面均比其它规范更为优越。     

双向DC-DC变换器拓扑结构综述

基于国内外对双向DC-DC变换器的研究成果,简述了各种拓扑结构的基本组成,系统地分析了它们的工作原理,总结了优缺点和异同点,进而对双向DC-DC变换器拓扑结构的分类方法重新进行了界定,为展开奠定了根基。然后指出了现有拓扑结构适用场合和存在的问题,并在此基础上为研究新型拓扑结构提出了建议,同时也为工程应用提供参考。     

浅谈老挝水库移民安置规划与国内的异同

结合老挝南塔河1#水电站移民规划工作经验,分析老挝水库移民的实施办法,进而浅谈老挝水库移民安置工作与国内的异同,指出从事国外水库移民工作应注意的问题。     

The gender reality hypothesis.

Comments on the article by J. S. Hyde (see record 2005-11115-001), in which Hyde reviewed meta-analytic evidence on gender differences and concluded that most psychological gender differences are in the close-to-zero or small range. The current author notes some omissions from Hyde's review, including the findings through other research large gender differences are reflected in some kinds of interests and occupational preferences, in males' and females placement on the people-things dimension of interests, and in many kinds of mental illness and behavior problems. The current author's position is that that many psychological gender differences are small-to-nonexistent, some are moderate, and some are large. The task that confronts gender researchers is to explain the complex profile of psychological gender differences and to untangle the myriad social and biological factors that generate both gender differences and gender similarities. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

L'anxiété face aux examens: Dimensionnalité, similitudes et différences chez les étudiants universitaires.

Scores were analyzed from two samples of undergraduate university students in the Toronto area who answered a questionnaire on exam anxiety (the "Test Anxiety Inventory": TAI). The samples (n = 645 and n = 462), which were both made up of women and men, some with English as their mother tongue and others having a mother tongue other than English, showed very comparable result patterns. Women reported a higher exam anxiety level than men on both dimensions of the questionnaire: Worry (TAIW) and Emotionality (TAIE). Students with a mother tongue other than English, an indicator of recent immigration--reported a higher level of anxiety than students whose mother tongue is English, for both the worry component and the emotionality component. Also, and moreover generally, the worry component of TAI (but not the emotionality component) appeared to have a negative correlation with the results obtained by the students in the final exam for the psychology introductory course in which they were registered. This correlation was not attenuated when a general intelligence test was taken into account. Finally, the TAI factorial structure was similar for both samples, with a model using two correlated factors showing better adjustment to the data than a unifactorial model. Given the strong correlation between the two factors, however, (r = 0,80), this hierarchical design of the TAI was supported. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

An evolutionary psychological perspective on gender similarities and differences.

Comments on the article by J. S. Hyde (see record 2005-11115-001), which reviewed the results of 46 meta-analyses of studies investigating gender differences and produced results that supported the gender similarities hypothesis that men and women are similar along most psychological traits. The current authors agree with the gender similarities hypothesis but argue here that Hyde's review has limitations that caused it to underestimate the true extent of gender differences. They also outline the benefits of adopting an evolutionary psychological perspective on gender differences. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Crossing textual and visual content in different application scenarios

This paper deals with multimedia information access. We propose two new approaches for hybrid text-image information processing that can be straightforwardly generalized to the more general multimodal scenario. Both approaches fall in the trans-media pseudo-relevance feedback category. Our first method proposes using a mixture model of the aggregate components, considering them as a single relevance concept. In our second approach, we define trans-media similarities as an aggregation of monomodal similarities between the elements of the aggregate and the new multimodal object. We also introduce the monomodal similarity measures for text and images that serve as basic components for both proposed trans-media similarities. We show how one can frame a large variety of problem in order to address them with the proposed techniques: image annotation or captioning, text illustration and multimedia retrieval and clustering. Finally, we present how these methods can be integrated in two applications: a travel blog assistant system and a tool for browsing the Wikipedia taking into account the multimedia nature of its content.

同化与异化 ——农耕文化视野下的传统乡建设计策略研究

在新型城镇化大潮的冲击下,古村落的保护与发展面临巨大的威胁,尤其是以传统农耕为主的聚族而居、精耕细作的文化形态面临着被淡忘甚至湮灭的危险。首先明确了我国的传统乡建还在不断进步当中,农耕文化作为传统乡村建设的重要组成部分,其作用与意义不容忽视,而后综合分析了新型城镇化与新农村建设之间的矛盾冲突和两极分化,思考在此种现实背景下传统乡建到底该以何种方式推进,之后探讨了如何将作为物质和精神载体的农耕文化通过设计策略的同异介入与传统乡建融会贯通,从产业、空间、文化、技术四个方面以及设计载体和传播方式上的多样性来寻求传统乡村建设的新模式,试图以农耕文化为底色,为新时代我国的传统乡村建设提供新的思路和有效路径。     

A Technique for Extracting Sub-source Similarities from Information Sources Having Different Formats

In this paper we propose a semi-automatic technique for deriving the similarity degree between two portions of heterogeneous information sources (hereafter, sub-sources). The proposed technique consists in two phases: the first one selects the most promising pairs of sub-sources, whereas the second one computes the similarity degree relative to each promising pair. We show that the detection of sub-source similarities is a special case (and a very interesting one, for semi-structured information sources) of the more general problem of Scheme Match. In addition, we present a real example case to clarify the proposed technique, a set of experiments we have conducted to verify the quality of its results, a discussion about its computational complexity and its classification in the context of related literature. Finally, we discuss some possible applications which can benefit by derived similarities.     

基于内容分组与能力匹配的邻居选择算法

邻居选择算法是影响P2P文件共享系统的整体吞吐量和带宽利用率的关键技术之一.目前BT类P2P文件共享系统中的一些常用邻居选择算法一般存在着邻居节点间的内容可交换性差和带宽利用率低等问题.提出一种新的邻居选择算法,将节点按内容分组,由节点上报的上传、下载的字节数计算出带宽能力,让能力匹配的节点成为邻居.计算机仿真实验表明,新算法显著地提高文件共享系统的整体吞吐量,减少用户的平均下载时间,从而有效地改善P2P文件共享系统的整体性能.