三元函数极值的探索

函数极值的存在性及判别方法是微分的重要应用之一.文章就三元函数给出了判别极值的存在的一个必要条件和充分条件.     

Comparison of 3D reconstructive technologies used for morphometric research and the translation of knowledge using a decision matrix

The use of three‐dimensional (3D) models for education, pre‐operative assessment, presurgical planning, and measurement have become more prevalent. With the increase in prevalence of 3D models there has also been an increase in 3D reconstructive software programs that are used to create these models. These software programs differ in reconstruction concepts, operating system requirements, user features, cost, and no one program has emerged as the standard. The purpose of this study was to conduct a systematic comparison of three widely available 3D reconstructive software programs, Amira^®, OsiriX, and Mimics^®, with respect to the software's ability to be used in two broad themes: morphometric research and education to translate morphological knowledge. Cost, system requirements, and inherent features of each program were compared. A novel concept selection tool, a decision matrix, was used to objectify comparisons of usability of the interface, quality of the output, and efficiency of the tools. Findings indicate that Mimics was the best‐suited program for construction of 3D anatomical models and morphometric analysis, but for creating a learning tool the results were less clear. OsiriX was very user‐friendly; however, it had limited capabilities. Conversely, although Amira had endless potential and could create complex dynamic videos, it had a challenging interface. These results provide a resource for morphometric researchers and educators to assist the selection of appropriate reconstruction programs when starting a new 3D modeling project. Anat Sci Educ 6: 393–403. © 2013 American Association of Anatomists.     

略论炎帝神农的传说与汉代画像

炎帝神农是中国古代传说中的伟大人物,是原始农业的创始人,还发明了最早的医药等,为远古渔猎时代进化至农耕时代做出了重要贡献,所以备受先民推崇,被尊为三皇之一。后人称颂炎帝神农有八大功绩,将炎帝神农同黄帝轩辕一起称为炎黄,是华夏民族的共同祖先。汉代已经有了祭祀炎帝神农的活动,而且有专门的祭祀场所,如“神农社”之类。汉代画像中常见有对炎帝神农事迹的描绘,虽然这些事迹具有浓郁的神话传说色彩,却形象而又生动地表达了对炎帝神农的崇敬。现代各地对炎帝神农的纪念活动,便继承了汉代以来的优良传统,将寻根问祖和中华民族的复兴很好地结合在一起,有利于加强中华民族的凝聚力,同时也张扬了中国在世界上的影响。所以有着非常重要的意义。     

从体育创造的三个层面看北京“新奥运”的三大理念——谈社区体育的“三个一体化”

体育创造铸就了北京奥运会的三大理念,如何借助北京“新奥运”的理念,推进社区体育的健康发展,就此提出创建社区体育“三个一体化”的新思路。     

"四人制"篮球教学比赛在普通高校中的推广意义

篮球运动作为非隔网的同场对抗的集体项目,提高学生在对抗中施展技、战术能力,是我们教学的最终目的。通过将“四人制”比赛法纳入篮球专项课的教学过程。经过实验对比表明,运动强度及基本战术的掌握和运用等方面的效果,“四人制”比赛都更优于“三人制”比赛,更适合作为篮球专项课中的教学手段之一。     

"三线共点"的常用证明方法

从仿射几何学与射影几何学的基本方法出发,简述了"三线共点"问题的一些基本的证明方法.     

政治文明的哲学透视

政治文明经过了传统政治文明和现代政治文明两大形态的历史运演,逻辑地表现为政治意识文明、政治制度文明和政治行为文明三大维度。政治文明的发展趋势日益走向民主化和民族化。     

以"三个代表"重要思想为指导,充分发挥党支部的战斗堡垒作用

党支部工作是高校党建工作的基础,各项思想政治教育工作、党的各项方针政策和任务的落实和完成、党员的日常教育和管理都要通过党支部去具体组织和实施。党支部在实际工作中要以“三个代表”重要思想为指导,注意加强党支部班子的建设,使其在工作中真正发挥战斗堡垒的作用。     

“三个代表”重要思想的理论和实践

学习“三个代表”的重要思想 ,必须坚持理论联系实际的马克思主义学风。要深入把握“三个代表”重要思想的理论根据和实践根据 ,更要研究怎样切实有效地实践“三个代表”。     

再论中华文艺复兴

旨在创造新的中华先进文化 ,以中华科技文化艺术普遍持久高涨为突出表现和主要特征的中华文艺复兴一定要实现。江泽民“三个代表”重要思想是推动和促进中华文艺复兴的思想武器