山地森林—干旱河谷交错带表层土壤侵蚀率与土壤物理性质的关系

采用野外调查与室内分析相结合的方法,研究了山地森林-干旱河谷交错带表层土壤侵蚀率及其与土壤物理性质的关系.结果表明:岷江上游干旱河谷区不同植被条件下表层土壤侵蚀较为严重,平均土壤侵蚀率为27.58％.土壤侵蚀率与土壤结构破坏率(SPBR)极显著正相关;与土壤有机质含量、＞0.25mm水稳性团聚体含量(WSA)、湿筛后团聚体平均重量直径(MWD)和几何平均直径(GMD)显著负相关.土壤侵蚀率分别与土壤有机质含量、结构破坏率、湿筛后团聚体MWD和GMW、＞0.25mm水稳性团聚体含量建立的回归方程预测效果相对较好.     

钢渣资源化利用现状及发展趋势

文章简要地概述了钢渣的来源和性质,重点介绍了钢渣资源化利用的应用研究现状,最后提出了钢渣资源化利用技术发展的趋势。     

高岭土的性质及应用

文章对高岭土的性质、结构、分类、用途等进行简单介绍,并论述了高岭土在多种不同领域内的应用。     

Getting to the heart of the matter: A diary study of swimmers’ appraisals of organisational stressors

Abstract

We explored sport performers’ cognitive appraisals of organisational stressors. The relevant demands and transactional alternatives that athletes experience in relation to the situational properties were identified. Thirteen national standard swimmers completed semi-structured, interval-contingent daily diaries for a 28-day period. A combination of inductive and deductive content analysis was used to organise and analyse the diary entries with a focus on the following areas: organisational stressors, their underlying situational properties, and the swimmers’ transactional alternatives. One hundred and thirty-one of the organisational stressors were appraised as threat, 41 as challenge, and 83 as harm/loss. Support was found for the majority of Lazarus and Folkman's (1984) situational properties with the only exception being temporal uncertainty. Imminence was associated with the greatest number of threat appraisals (47), novelty was associated with the greatest number of challenge appraisals (17), and duration was associated with the greatest number of harm/loss appraisals (22). It is concluded that appraisal plays a pivotal role in sport performers’ experiences of their organisational environment. Swimmers’ transactional alternatives are influenced by the situational properties of the stressors encountered.     

Validation of Weinbach's and Hanavan's Models for Computation of Physical Properties of the Forearm

Abstract

The purpose of the present study was to validate the Weinbach and the Hanavan models for the determinations of the forearm volume and center of mass. The study was conducted using 20 forearms from six male and four female cadavers. Results from the present investigation indicate that Weinbach's model is more accurate than Hanavan's model in estimating forearm volume and center of mass. The relative location of the center of mass and the center of volume was also investigated with the Weinbach model and these centers were found to coincide. The Hanavan model should be used only in the cases where the shape of the forearm closely resembles that of a truncated cone.     

国内外礼仪教育研究现状及综述

不同的国度和区域具备不同的文化,不同的民族之间有着思维方法和价值观念的差别。主要从两方面介绍东西方礼仪教育研究的特色,一方面东西方礼仪文化教育拥有共通性,无论任何形式,都存在着固定或者特定的共通准则;另外一方面礼仪教育在差异的文化背景中又表现了不同的内涵和实质。在此基础上我们应当看重礼仪的＂共性＂,尊重礼仪的＂个性＂,可以增强我们对文化差别的敏感性以及对其他文化的顺应能力。     

商洛人工种植半夏的质量研究

通过对商洛人工种植半夏(旱半夏)与主产地药材(四川长乐半夏)进行了性状、显微及薄层色谱方面的比较,结果显示商洛人工种植半夏的质量符合《中华人民共和国药典》的质量标准.     

退火处理对紫铜组织和性能的影响

对紫铜进行了退火处理,并进行了力学性能试验和金相组织分析,结果表明退火处理能改善紫铜的组织和性能,对后续的锻造生产有指导意义。     

高效熔体处理对易拉罐用铝材铸态组织和性能的影响

用高效熔体处理技术制备试验用易拉罐用铝材，探讨了该技术对其铸态组织与力学性能的影响规律。结果表明：高效熔体处理可有效改善和提高易拉罐用铝材的冶金质量，与未处理相比，除杂率与针孔降低幅度分别为71．05％和94．49％，平均晶粒尺寸仅为76．5μm；晶界处第二相为(Al，Fe，Mn，Mg，Si，RE)或(A1，Fe，Mn，RE)复合相，呈短小骨骼状或小球状，晶内(A1，Mg)相呈细小颗粒状；拉伸断口为穿晶微孔聚集型断裂，与未处理相比，抗拉强度与伸长率分别提高16．6％及90．2％。     

党的先进性与社会主义的优越性

党的先进性与社会主义的历史必然性和优越性密切联系。没有社会主义的历史必然性和优越性,共产党就失去存在价值,更谈不上什么优越性。因此,仅仅从党与阶级的关系角度认识党的先进性,不能不说是传统先进性理论的一个重大缺陷。毛泽东、邓小平、江泽民都在坚持党的工人阶级先锋队性质基础上,不断发展党的先进性理论,特别是江泽民提出的"三个代表",把党的先进性与社会主义的优越性统一起来,实现了党的先进性理论的重大创新和发展。