中国男子田径运动突破方向研究

运用文献资料研究、数理统计等方法，对我国男子田径运动发展现状进行剖析，指出成绩不理想的主要原因，提出了我国男子田径运动重点突破方向及相应改革思路，以期为2008年北京奥运会取得突破及新一轮《奥运争光计划》的可持续实施提供决策参考依据。     

基于Web的学校田径运动会管理系统

本文从学校的实际情况出发,在对学校田径运动会流程和要求等事项进行调查分析的基础上,确定田径运动会管理系统的具体实现功能;并阐述了系统的结构模块设计和设计原理及实现的各项功能说明等。本系统是基于Web平台开发,以人机交互式的客户端程序实现对田径运动会的报名、秩序册生成、成绩输入输出等事务的实时管理,操作简单容易,大大提高了运动会管理流程的效率。     

场独立/场依存与监察假设

本文通过探讨场独立/场依存认知方式、监察假设以及它们之间的关系,试图揭示场独立者比场依存者在SLA中更善于运用语言监察机制的现象,从而说明和场独立/场依存相关的第二条L2认知假设不能成立的原因.     

“创造公平竞争环境”：美国名校申请者“背景考察”的动因

美国名校之所以对申请者取得的成就进行“背景考察”,动因在于为弱势群体“创造公平竞争环境”。一方面,不同高中提供的课程和师资资源存在明显差异,影响着弱势申请者的课程修读情况和推荐信质量。另一方面,受到家庭资本的影响,弱势学生在成长过程中享有的资源和机会有限,导致学业和个人成就普遍偏低。因此,脱离背景的评价容易产生偏向性,考察教育背景和个人成长背景则主动考虑了阶层内生劣势,有助于名校达成促进社会流动的办学使命。     

Isolation and physiological characteristics of a premature senescence mutant in rice(Oryza sativa L.)

INTRODUCTION Leaf senescence is a kind of programmed cell death (PCD) in plants that is highly controlled by a genetically programmed process involving degrada-tion of cellular structures, decline of photosynthesis massive generation of active oxygen species (AOS) and mobilization of nutrients (Nam, 1997; Lim et al.,2003). Many environmental factors have been shown to play a role in causing the photosynthetic decline to lead to premature senescence. Leaves exposed to ultraviolet radia…     

新石器时代长江、黄河两大文化体系比较

我国新石器时代长江、黄河两大文化体系存在着地理环境、农作物与家畜品种、生产方式与生活方式的差异，房屋建筑、葬丧制度及宗教信仰的文化内涵截然不同。黄河文明祖先崇拜所构成的氏族团体奋斗精神，强化宗教权威崇拜所具有的内聚力，对外扩张的进取性，造成北方文化 旺盛的生命力；南方松散而缺乏向心力的氏族团体，自由随意、缺乏积极进取而保守的水稻文化，失去一种锐意进取精神，最终走向衰弱。中国文明在黄河流域产生也就不是偶然了。     

汉语成语语义场试探

通过借助于语义场理论，对汉语成语语义场作些探索性的论述。全文分为“狭义的成语语义场与广义的成语语义场”和“语言的成语语义场与言语的成语语义场”两部分。狭义的语义场下分等义、近义、反义、类义等子语义场；广义的语义场，指表示同类事物现象的成语间宽泛的类属关系：凡从静态的角度阐述成语语义场的属于语言的语义场，凡从动态的角度阐述成语语义场的属于言语的语义场。最后就成语的语义场嬗变、语义场强度、语义场文化背景等问题提出一些浅见：     

“添补法”在物理学中的应用

把一特殊的方法─—添补法 ,应用于“力学”及“电磁学”中 ,从而使一些复杂的问题变得简单     

Isolation and physiological characteristics of a premature senescence mutant in rice （Oryza sativa L.）

A rice pse(t) (premature senescence, tentatively) mutant line, was isolated from 4500 independent T-DNA inserted transgenic lines. The symptoms of premature senescence appeared more severely than those of the control plants (Zhonghua 11,japonica) at the last development stage. To characterize the mutant and provide basic information on the candidate genes by mapping to a physical region of 220-kb, experiments were carried out in two phytotrons under controlled temperature of 24 ℃ and28 ℃, respectively. The content of chlorophyll, soluble protein and MDA (malondialdehyde), net photosynthesis, the antioxidant enzyme activities of SOD (superoxide dismuase) (EC 1.15.1.1) and POD (peroxidase) (EC 1.11.1.7) and the peptidase activities of leaves were measured from top to bottom according to the leaf positions at the flowering stage. Compared with the control plant,the mutant showed the following characteristics: (1) Higher net photosynthesis rate (Pn) appeared in the 1 st and 2nd leaves, contents of chlorophyll and soluble protein were also higher in the 1 st leaf; (2) The activities of SOD, POD and peptidase were higher according to the leaf position from top to bottom; (3) The symptom of premature senescence was accelerated in the mutant at 28℃treatment. The MDA content and the SOD and POD activities between the 24 ℃ and 28 ℃ treatment mutants were not significantly different. Content of chlorophyll and soluble protein of leaves mutant decreased rapidly at 28 ℃ treatment. The results show that pse(t) is sensitive to high temperature. The probable function of PSE(T) is discussed.     

保证质量提高出米率的工艺措施

本文研究探讨了如何在保证产品质量的前提下提高出米率的问题,提出了在加工过程中杜绝下脚含粮、减少碎米、降低碾减率、合理配米、减少超标碎米等有效工艺组合及工艺措施,从而实现在保证质量的前提下提高出米率的工艺目标。