科学是如何成为认识工具的?

科学成为认识工具的三个要素是 :个人经验变为集体经验 ;具有一套精密的推理规则 ;心理上的感觉材料与实体事物是有差别的。本文认为三要素可为我们理解科学的本质、科学的形成与发展提出思考的前提。     

Fault diagnosis for analog circuits based on chaotic signal excitation

A fault diagnosis method for analog circuit is proposed in this paper. An all-purpose amplifier is taken as the typical circuit under test (CUT). The chaotic signal, which is generated by an improved Chua's circuit, is employed as the excitation signal of CUT. The algorithm for phase-space reconstruction of chaotic time series is a combination algorithm of multiple autocorrelation and Γ-test. The circuit state is estimated based on detecting the geometric change of Chua's attractor with a data-mining approach. For the purpose of information fusion, another eight features are extracted from the testing data to comprehensively determine the CUT states. A discussion is made for comparing the effectiveness of each feature according to the testing results.     

Efficient implementation of associative classifiers for document classification

In practical text classification tasks, the ability to interpret the classification result is as important as the ability to classify exactly. Associative classifiers have many favorable characteristics such as rapid training, good classification accuracy, and excellent interpretation. However, associative classifiers also have some obstacles to overcome when they are applied in the area of text classification. The target text collection generally has a very high dimension, thus the training process might take a very long time. We propose a feature selection based on the mutual information between the word and class variables to reduce the space dimension of the associative classifiers. In addition, the training process of the associative classifier produces a huge amount of classification rules, which makes the prediction with a new document ineffective. We resolve this by introducing a new efficient method for storing and pruning classification rules. This method can also be used when predicting a test document. Experimental results using the 20-newsgroups dataset show many benefits of the associative classification in both training and predicting when applied to a real world problem.     

骨料与成型工艺对透水混凝土性能的影响

试验研究了砂率、石子级配以及搅拌与成型工艺对透水混凝土主要性能的影响。试验结果表明：砂率和石子级配对混凝土的抗压强度有利,但同时对透水系数有着负面的影响;机械成型对混凝土强度有益而对透水系数有影响,但影响不显著。合理解决这些问题能为配置高性能透水混凝土提供依据。     

新时代社会主要矛盾转化背景下体育与娱乐融合发展研究*

基于新时代社会主要矛盾的变化,分析了体育与娱乐融合发展的理论依据、现实需要与价值逻辑,探讨了体育与娱乐融合发展的现存问题,并有针对性地提出了对策。现存问题是：资源配置市场化水平不高;相关工作机制和支持平台缺失;专业化人才支撑不足;政策法规体系不完善。发展对策是：以改革释放体育资源活力;建立完善相关工作机制和支持平台;积极培养体育娱乐融合的专业化人才;出台促进体育娱乐融合发展的政策法规。     

“双主体探究教学模式”在篮球选项课教学中的应用研究

在篮球选项课教学中运用传统的体育教学模式存在着许多有待改进的方面,在认真分析及深刻理解＂双主体探究教学模式＂理论的基础上,将其验证性的运用在桂林师范高等专科学校篮球选项课教学中,实验证明：将＂双主体探究教学模式＂应用于篮球选项课教学中,可以改变学生学习方式;激发学生学习兴趣;促进学生个性化学习、协同配合学习,提高集体凝聚力;培养学生观察、探究、思维与分析及综合运用知识,实现自我建构的能力;使学生在认知、情感、动作技能形成等方面得到较快提高;同时也改变了教师的教学观和学生观,提高了篮球选项课的教学质量,符合高校体育教学改革的需要。     

从区域信息资源共享模式看郑州市公共图书馆集群构建

市级公共图书馆作为当地人民信息需求的保障中心,有义务建立信息服务全覆盖的图书馆体系。文章根据郑州市公共图书馆建设的现状,经过科学分析,提出了建设郑州市公共图书馆集群管理服务体系的目标、结构、实现模式及运行方式。     

俐侎人服饰的审美特点

俐侎人是云南省独有的一个神秘民族,他们的服饰呈现出简洁大方、古朴厚重、端庄典雅之美,具有很强的民族特色和独特的审美价值,是其民族审美意识的重要载体。文章分别从简洁的款式、单纯的色彩、精致的饰物三方面对俐侎人服饰文化作一些探讨,挖掘其审美文化内涵。     

基于主路径分析的HistCite结果改进研究

文献之间的引用关系是研究科学发展的重要依据.1997年 Webometrics一词首次在研究论文中被提及,以WOS数据库中1998年以来所有引用该文的文献为分析对象,运用引文时序分析法绘制了网络计量学发展的引文编年图,论述引文编年图的结果和应用中存在的不足;使用主路径分析法筛选网络计量学发展中构成研究传统主干的文献节点,指出利用主路径分析方法能够弥补引文编年图的不足,两者结合能够更好地揭示科学发展的主要过程.     

浅议地方特色院校家庭经济困难学生资助工作的育人特色

地方特色院校家庭经济困难学生偏多,资助工作压力大,通过资助育人的难度大,笔者试图以本校为例,简单介绍了资助育人的特色,为进一步做好地方特色院校家庭经济困难学生资助育人工作提供了素材。