计算E型方杯压敏电阻最佳位置的一种有效方法

采用有限元法计算了Ｅ型方杯的挠度及应力分布,并从应力差计算出了压敏电阻设置的最佳位置．     

Whence the eigenstate–eigenvalue link?

David Wallace has recently argued that the eigenstate–eigenvalue (E–E) link has no place in serious discussions of quantum mechanics on the grounds that, as he claims, the E–E link is an invention of philosophers rather than the community of practicing physicists. This raises an historical question regarding the origin of the link. This paper aims to answer this question by tracing the historical development of the link through six key textbooks of quantum mechanics. In light of the historical evidence from these textbooks, it is argued that Wallace provides insufficient grounds for dismissing the E–E link from discussions of quantum mechanics.     

校园体育文化建设初探

探讨了校园体育文化的结构、功能、特点等问题,提出了校园体育文化建设的建议     

对宁波市农村初中学校体育现状的调查与分析

通过对宁波市农村初中的体育场地、器材设备、教师数量、年龄结构、学历、男女教师的比例、体育课程设置、体育课外活动和校内体育竞赛等现状进行分析研究。探讨影响宁波市农村初中学校体育向更高水平和层次发展的主、客观原因,提出一些合理化建议,以期对各农村初中学校体育的进一步发展起到一定的借鉴作用,为政府职能部门提供发展学校体育决策的客观依据。     

应用Pro／E对凸轮机构动力学分析的方法

本文从运动仿真角度入手，详细介绍应用野火版Pro／E3．0软件对凸轮机构的运动过程进行分析并记录运动过程中的参数，通过对得到的测量参数的进行系统性分析，提出科学的见解，帮助产品设计者检查所设计的模型是否符合生产实际的需要以及发现在运动过程中出现的问题，有针对性的对零件的欠合理部分进行评估和再设计，以提高产品的性能，使之更好的满足生产实际需求.     

PC-E500在道路测设中的应用

为了方便道路测设的实地选线和放线,本文介绍了用Basic语言编写PC-E500的测量实用程序,并介绍了此程序在实际工作中的操作和应用.     

西松烯内酯的合成研究——Ⅱ.中间体苏式-7-羟基-3,9,13-三甲基-6-异丙烯基-(2E,8E,12)-十四碳三烯苯硫醚的合成

以香叶醇为原料经过4步反应得到8-溴-3,7-二甲基-(2E,6E)-辛二烯基苯硫醚(7),(7)与(?)牛儿醛在Cr(Ⅱ)作用下立体选择地得到苏式-7-羟基-3,9,13-三甲基-6-异丙烯基-(2E,8E,12)-十四碳三烯苯硫醚.     

Molecular pathogenesis of apolipoprotein E-mediated amyloidosis in late-onset Alzheimer’s disease

Apolipoprotein E (apoE) ɛ4 allele is a genetic risk factor for late-onset familial and sporadic Alzheimer’s disease (AD). In the central nervous system, apoE is secreted mainly by astrocytes as a constituent of high-density lipoproteins. A recent study using apoE knockout mice provided strong evidence that apoE promotes cerebral deposition of amyloid β protein (Aβ). However, no clear explanation of the pathogenesis of apoE-induced AD has been provided. Here we discuss two possible mechanisms by which apoE might enhance Aβ deposition. One is the intracellular pathway in which apoE is internalized by neurons and induces lysosomal accumulation of Aβ and amyloidogenic APP (amyloid precursor protein) fragments, leading to neuronal death. The other is the extracellular pathway in which apoE-containing lipoproteins are trapped by Aβ1–42 deposits mobilizing soluble Aβ peptides and consequently enlarge amyloid plaques. These two mechanisms may operate at different stages of AD pathogenesis and suggest a chaperone-like function for the apoE molecule. Received 4 February 1999; received after revision 9 April 1999; accepted 23 April 1999     

对体育教学中科学地运用激励手段的探讨

体育教学中运用激励手段，一方面会提高学生的学习兴趣；另一方面会提高教学效果，但关键的是教师对激励手段时机及方法的适时运用和把握。