山羊绒针织物起球过程的研究

通过分析山羊绒针织物起球机理,对山羊绒针织物的起球过程进行了观察研究,得出其起球过程的三个阶段:绒毛的产生、绒毛缠结成球和球的脱落.在起球过程中还进一步发现球的个数、球的重量以及起球程度随时间的变化而有所不同,但都会随着时间的增加达到最高值,然后随着时间的增加而减少.因而据此可做出山羊绒针织物的起球曲线,对起球曲线进行分析从而可得出山羊绒针织物摩擦起球的合适时间,对进行抗起球整理时的优化参数有指导意义.     

AIN基片上重掺杂硼的多晶硅膜电阻率温度特性

研究了ＡｌＮ基片上重掺杂硼的多晶硅膜电阻率温度特性。实验发现，膜电阻率随温度变化呈现出从ＮＴＣ过渡到ＰＴＣ的Ｕ型特性，转折温度ＴＭ的位置依赖工艺条件的变化。理论分析表明：晶界势垒使膜电阻率在温度变化上存在一个极小值，极小值对应的转折温度正比于晶界势垒。     

关于列表曲线插补问题的探讨

本文介绍了根据列表曲线的离散点计算各程序段初值的一般方法.     

论语言普遍性的多维度存在

目前语言学界对语言普遍性的研究主要有两条思路，一条是以Chomsky为代表的生成语法理论，主张通过对一种语言作深入的研究，采用推演法找出语言的共性；另一条是以Greenberg为代表的功能类型学理论，主张通过对多种语言进行比较，采用归纳法找出语言的共性。这两种思路的研究都已经取得了丰硕的成果，语言中存在普遍性的观点也得到了越来越多学者的认同。但仍有学者对这一观点持质疑的态度。我们认为，语言普遍性是语言学存在的理论前提，并在语音、句法、语义和语用等多个维度中存在。从句法和语用两个维度，根据语言现实，结合生成语法及普遍语用学理论，进一步论证语言普遍性在语言中的多维度存在。     

圆锥曲线的光(声)学性质

本文以微分方程为主要工具揭示了圆锥曲线的光(声)学性质。     

论西方拒证权制度体现的普世伦理意义

西方拒证权制度的设立有其合理因素和价值意义,从普世伦理的角度,即保障社会存在与发展、增进每个人的利益、实现每个人幸福的角度来看,拒证权设立的普世伦理意义是:当法律原则和道德原则发生冲突时,法律的真实性原则应当向普世伦理标准作出让步、妥协和回归。     

Parenting as a Dynamic Process: A Test of the Resource Dilution Hypothesis

In this paper, we tested the resource dilution hypothesis, which posits that, because parenting resources are finite, the addition of a new sibling depletes parenting resources for other children in the household. We estimated growth curve models on the self‐reported parenting practices of mothers using four waves of data collected biennially between 1994 and 2000 on a nationally representative sample of 2,082 Canadian children aged 2 to 5 at initial interview and in continuously intact, two‐biological‐parent households. Results showed that when new children were added to the household, mothers exhibited declines in positive interaction, but increased their levels of consistent parenting. Taken together, these findings suggested that parenting resources were reallocated, rather than diluted, when family size increased.     

Fundamental references from the Western culture

This article presents theoretical elements concerning the ‘nature versus culture’ confrontation as a particular aspect of the worldwide expansion of Western civilization. Several speculations are made concerning the philosophical foundations which have provided the base for the current political and economic mega-scenarios in the contemporary world. We turn our attention to the articulations of the concept of nature with the processes of mondialization of Western culture and with the history of universal culture. Finally, several considerations are made on the dynamics of economic processes on a world scale and projections on the impact of science and technology in the social and political frames that are taking place in the contemporary world.     

流体粘度对涡轮流量计性能影响的理论预测

流体粘度是影响涡轮流量计性能的主要因素之一。本文运用粘性流体力学原理对现有涡轮流量计理论模型进行了改进。根据新模型计算的流量计特性曲线与变粘度实验结果更为吻合,从而为解决工业生产中涡轮流量计测量结果的粘度修正问题提供了实用的方法。利用本文的研究结果还可预测仪表几何参数和来流速度分布等因素对涡轮流量计性能的影响,作为改进仪表设计的理论依据。