基于主成分分析的烟台县域经济类型实证研究

以烟台市13个县市区为研究对象,选取15项主要社会经济指标,应用主成分分析和聚类分析法对其经济社会发展类型进行综合分析和聚类研究,将13个县市区分为四种类型,并提出了经济发展的对策措施。     

重言管窥

重言源远流长,应用广泛普遍。它结构独特,灵活多样;它短小凝炼,鲜明生动,往往起到画龙点睛的作用。通过重言来构词或构形,是汉语悠久的历史传统,也是具有鲜明民族特色的语汇、语法现象。在文学创作中,重言运用一直被当作主要的语言表现手法之一。重言的意义不仅表现在语言、文学上,而且渗进更广泛、深刻而根本的中国“社会传统”和“心理习惯”之中。它成为一种文化现象,对中国语言及文学、文化的历史、现实与未来产生重要的影响。     

论怀药文化的继承与发展

文章论述了怀药文化的渊源、内涵和组成部分,分析了当今怀药文化存在的问题,提出了发展怀药文化的道路是优选继承和合理创新。发扬怀药文化,要去掉神秘性,增加科学性;去掉盲目性,增加规范性;去掉定性的、文学性的描述,增加定量的科学的证据;去掉祈求风调雨顺,增加对内在规律、各制约因素间的联系和条件的把握。要解放思想、勇于创新,在大力发展怀药经济的同时,创造出新时代灿烂辉煌的怀药文化,在怀药文化发展的历史长河中留下我们这个时代的印迹。     

Coordination pattern of baseball pitching among young pitchers of various ages and velocity levels

This study compared the whole-body movement coordination of pitching among 72 baseball players of various ages and velocity levels. Participants were classified as senior, junior, and little according to their age, with each group comprising 24 players. The velocity levels of the high-velocity (the top eight) and low-velocity (the lowest eight) groups were classified according to their pitching velocity. During pitching, the coordinates of 15 markers attached to the major joints of the whole-body movement system were collected for analysis. Sixteen kinematic parameters were calculated to compare the groups and velocity levels. Principal component analysis (PCA) was conducted to quantify the coordination pattern of pitching movement. The results were as follows: (1) five position and two velocity parameters significantly differed among the age groups, and two position and one velocity parameters significantly differed between the high- and low-velocity groups. (2) The coordination patterns of pitching movement could be described using three components, of which the eigenvalues and contents varied according to age and velocity level. In conclusion, the senior and junior players showed greater elbow angular velocity, whereas the little players exhibited a wider shoulder angle only at the beginning of pitching. The players with high velocity exhibited higher trunk and shoulder rotation velocity. The variations among groups found using PCA and kinematics parameter analyses were consistent.     

中学生肥胖症与营养的关系研究

运用资料分析法，对我国13—18岁男女中学生1995年和2000年二次体质调研结果中形态发展指标及其派生指标进行动态分析，结果表明：过去5年间，我国中学生身体形态水平总体呈上升趋势；但营养过剩状况成为威胁学生健康的常见营养问题．因此，建议有关部门采取有力的干预措施，改善我国中学生的营养状况，促进学生健康成长．     

具有多连通分支的超越整函数的增长性

Let g and h be two transcendental entire functions. Suppose that the Fatou set F（goh） contains multiply connected components. In this article, we will consider the growth of the functions g and h.     

High-extensible scene graph framework based on component techniques

INTRODUCTION With the tremendous growth of the digital en- tertainment industry in the past decades, the scale of game scene is becoming more gigantic. To effectively manage and organize the massive data, game engine usually uses hierarchical scene graph. Many popular 3D modelling tools, such as Maya, 3D Studio Max, use scene graph to manage the scene content (Sowizral, 2000). 3D modelling software—Houdini directly edits scene graph to create and modify the virtual environment. Most v…     

古文英译的历程和前景

古文英译是翻译事业的组成部分。回顾古文英译的历程、总结经验、展望未来 ,以期有助于中西文化的交流和中西外事的交往。     

义素分析法在语言教学中的功用

义素分析法在词语解释、同义词辨析、反义词对比、修辞分析中有特殊的功用，特别是对当今有些看似错误的特殊的语言现象通过义素分析，可以窥见语言发展的新动向。     

水稻免耕栽培生理基础——Ⅱ.免耕水稻的光合特性

威优64、陆青早1号作为试验材料,免耕能提高功能叶的光合速率、生育前期功能叶的呼吸强度、绿叶面积、叶绿素和可溶性蛋白含量,并延缓它们在生育后期的下降速率,降低后期功能叶的呼吸速率。主分量分析说明,在研究光合作用时,光合强度、叶绿素、可溶性蛋白质、叶片含氮量,可以任意选择一个作为光合特性指际。粒/叶比说明,免耕对源的改善较对库的改善较好些。