负重有氧练习对女大学生身体成分影响初探

为了探讨女大学生减肥的有效方法,将随机取样的女大学生分为具有可比性的两组.实验组背负10%体重的外加负荷进行3～4周的有氧运动练习;对照组在常规情况下进行相同时间的非负重有氧练习.实验结果显示,负重组有氧运动锻炼后,学生的身体成分有更明显的改善.     

Assigning appropriate weights for the linear combination data fusion method in information retrieval

In data fusion, the linear combination method is a very flexible method since different weights can be assigned to different systems. However, it remains an open question which weighting schema should be used. In some previous investigations and experiments, a simple weighting schema was used: for a system, its weight is assigned as its average performance over a group of training queries. However, it is not clear if this weighting schema is good or not. In some other investigations, different numerical optimisation methods were used to search for appropriate weights for the component systems. One major problem with those numerical optimisation methods is their low efficiency. It might not be feasible to use them in some situations, for example in some dynamic environments, system weights need to be updated from time to time for reasonably good performance. In this paper, we investigate the weighting issue by extensive experiments. The key point is to try to find the relation between performances of component systems and their corresponding weights which can lead to good fusion performance. We demonstrate that a series of power functions of average performance, which can be implemented as efficiently as the simple weighting schema, is more effective than the simple weighting schema for the linear data fusion method. Some other features of the power function weighting schema and the linear combination method are also investigated. The observations obtained from this study can be used directly in fusion applications of component retrieval results. The observations are also very useful for optimisation methods to choose better starting points and therefore to obtain more effective weights more quickly.     

熵权法评价图书馆读者满意度的改进模型

在综合前人研究成果的基础上,对图书馆读者评价模型进行改进和扩展,既引入Shannon的信息熵来描述评价权重的不确定性,同时又利用理想点法计算权重的优越性,给出了一种计算读者满意度评价指标权重的新方法,建立了基于熵权和理想点法的读者满意度综合评价模型,从而有效实现对各个图书馆的读者满意度进行综合评价。     

轻型网络的嵌入式网关软件框架的设计

本文分析了嵌入式Internet的发展趋势,介绍了两种典型的嵌入式网关模型。针对常用的轻型网络,提出了一个整合了内、外网通信的新型嵌入式网关软件框架,论述了各软件模块的工作原理,并对其上的数据流进行了分析。     

中文图书采购招标评价指标体系权重的设置

提出采用层次分析法对中文图书采购招标评价指标体系权重进行设置,利用该方法针对事先确定的评价指标,通过对12名从事中文图书采购工作均在3年以上的专家进行问卷调查,计算出各评价指标的权重,可为中文图书采购招标的评价工作提供一定的借鉴。     

基于一种新的权值的集员辨识的椭球外界算法

在研究Fogel所提出的最小化椭球容积准则和最小化椭球轴长平方和准则椭球算法的基础上,根据相关数学理论,提出了一种新颖的权值,通过这种权值来对椭球算法进行仿真,可得出这种基于新的权值的集员辨识的椭球外界算法的收敛性和一致性都得到了前所未有的改进。     

一个-2齐次核的Hilbert型不等式及其逆式

本文通过估算权系数,建立一个-2齐次核的Hilbert型不等式及其等价式,并考虑了其逆向不等式的情形.     

模拟高原环境下服用免疫类中成药对运动大鼠体重和脾重的影响

高原和低氧训练被认为对于运动员机能状况和运动能力的提高有一定的效果,已有研究表明[1],低氧暴露和高原训练可对免疫功能产生抑制作用.实验以雄性SD大鼠为实验对象,以符合跑台训练方式建立低氧训练模型.实验结果表明:服用贞芪扶正胶囊的大鼠体重及脾重含量明显高于其对照组(P0.05),说明服用贞芪扶正胶囊可以使血液中淋巴蛋白增高,阻止了机体防止免疫球蛋白分解,从而使防御性抗体形成.     

模糊综合评判法及其在教学评估中的应用

本文结合高校教学评价工作的实际，对模糊综合评判法及其在教学评价中的应用作了分析与讨论，并在合理确定评价指标的模糊关系矩阵与采用模糊合成运算等问题上提出了自己的一些不同观点。     

分析天平砝码的检定

天平、砝码是定量分析实验中的重要仪器之一，称量的准确与否直接影响着分析结果的准确度．目前分析实验的教科书中均只介绍了天平的性能指标和检定方法，而很少涉及砝码的检定．因此，本文介绍了天平砝码常用的检定方法，供参考．