优秀健美操运动员气质类型及相关因素的研究

采用气质评定和灰色关联分析的方法，对优秀健美操运动气质类型及相关因素进行量比分析与研究，为教练员提供选拔优秀健美操运动员作参考。     

不可约合作系统的极限集

证明了在省去有界正向不变开集G时，系统x＝f(x)的正半轨除了一个Ledesgue测度为零的集外，其余正半轨都走向奇点或无穷；在Ω(Pi)为非空非紧致的条件下，Hirsch所得到的结论“若p1≤p2，且系统x=f(x)过pi的轨道的ω极限集Ω(pi)紧致，则Ω(p1)=Ω(P2)包含E(奇点集)或Ω(p1)＜Ω(p2)，即Ω(p2)与Ω(p2)强相关”仍然成立．     

G proteins as drug targets

The structure and function of heterotrimeric G protein subunits is known in considerable detail. Upon stimulation of a heptahelical receptor by the appropriate agonists, the cognate G proteins undergo a cycle of activation and deactivation; the α-subunits and the βγ-dimers interact sequentially with several reaction partners (receptor, guanine nucleotides and effectors as well as regulatory proteins) by exposing appropriate binding sites. For most of these domains, low molecular weight ligands have been identified that either activate or inhibit signal transduction. These ligands include short peptides derived from receptors, G protein subunits and effectors, mastoparan and related insect venoms, modified guanine nucleotides, suramin analogues and amphiphilic cations. Because compounds that act on G proteins may be endowed with new forms of selectivity, we propose that G protein subunits may therefore be considered as potential drug targets. Received 18 September 1998; received after revision 6 November 1998; accepted 11 November 1998     

多项式重置增量型模糊控制器

本文对模糊控制器的原理与结构进行了分析研究,改进了增量型模糊控制器,提出多项式重置增量型模糊控制器,将其与增量型模糊控制器做了比较,并应用于温控实验炉,事实表明这种改是行之有效的。     

边际效应特征及其增值效应探讨

边际效应存在在于自然界和人类社会现象“相变”过渡带或过渡界面中,是一种普遍存在的自然和社会现象;过滤带或过滤界面中存在急变带或急变界面,其景观异质最高,由于交界带内物质的兼并,重组和升华,边际效应具有明显的增殖效应,能构筑出奇异的景观。     

多维凸函数的指数分析

该文引入Rn上凸函数具有一般的、合适的上、下指数概念，将[1]、[2]以及[3]中相应结果及讨论推广到多维情形。     

直接数字式频率合成器

本文详细介绍了直接数字式频率合成器的工作原理、组成框图和它的主要性能，并介绍了有关集成电路芯片。     

Drag increment due to internal waves generated by Rankine ovoid

The experimental results on drag increment caused by internal waves, which are generated by a Rankine ovoid towed horizontally at constant velocities in a two-layer stratified water (a strong pycnocline) initially at rest, are presented. The drag increment due to stratification is obtained experimentally as a function of internal Froude number Frd and Reynolds number Re. From the results, it is shown that as a function of Frd or Re, an increment in mean drag coefficient due to stratification ΔCd has both increasing and decreasing region attributable respectively to internal wave and to collapse of mixing fluids in the wakes. A most significant result shows that when Frd=0.838 there exists a maximum of ΔCd, which is equal to 0.05 in the exciting region of the strong internal wave generation.     

耐力训练后最大摄氧量增量(%9 Vo_2max)的因素分析

根据有关文献资料的统计结果,进一步分析各负荷因素对V·o2max的影响,揭示V·o2max增量规律,掌握改善V·o2max的训练方法和运动处方,为发展耐力素质和科学健身提供研究资料和科学依据。     

关于特征函数、隶属函数、关联函数间的相互关系

本文说明了特征函数、隶属函数、关联函数的基础经典集合、模糊集合、可拓集合产生的实际背景和三个集合各自的特点,指出可拓集合非空。阐明了三种函数概念之间的区别与联系,特别指出关联函数的建立使应用物元理论更符合实际的描述。