Adjacency matrix concepts for the analysis of the interconnection of networks     

William N. Anderson  Richard J. Duffin  George E. Trapp 《Journal of The Franklin Institute》1974,298(1):9-27

A mathematical theory is developed for an imagined device termed a “junctor”. A junctor could be used to interconnect two n-terminal networks giving rise to another n-terminal network. Actually a junctor is itself a simple network with three banks of n-terminals internally connected in some fashion by perfectly conducting wires. Adjacency matrices are formulated to analyze various junctors and their current flows. The main problem treated concerns conditions which would ensure that the junctor operation is associative.  相似文献   

The size-frequency distribution of grains of silver halide in photographic emulsions and its relation to sensitometric characteristics. VI.— Photographic densities derived from sizefrequency data     

E.P. Wightman  A.P.H. Trivelli  S.E. Sheppard 《Journal of The Franklin Institute》1924,198(2):244-245

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PUBLIC APPROVAL OF ENVIRONMENTAL PROTECTION AND OTHER NEW SOCIAL MOVEMENT GOALS IN WESTERN EUROPE AND THE UNITED STATES     

Mertig  Angela G.; Dunlap  Riley E. 《Int. Journal of Public Opinion Research》1995,7(2):145-156

The environmental movement is one of the most successful socialmovements of the twentieth century, and a key reason for itssuccess has been strong public approval of the movement's goalof environmental protection. This paper reports cross-nationaldata on public approval of environmental protection relativeto approval of the goals of other major ‘new social movements’—theanti-nuclear power movement, the nuclear disarmament movement,the women's movement, the human rights movement and the animalrights movement—in Western Europe and the United States.The data come from a 1990 ‘lifestyles and attitudes’survey conducted by Gallup for Reader's Digest, based on nationallyrepresentative samples in the United States and seventeen Europeannations, and show higher public approval for environmental protectionthan for the goals of other new social movements.  相似文献   

Knee extensor and flexor torque development with concentric and eccentric isokinetic training     

Miller LE  Pierson LM  Nickols-Richardson SM  Wootten DF  Selmon SE  Ramp WK  Herbert WG 《Research quarterly for exercise and sport》2006,77(1):58-63

This study assessed muscular torque and rate of torque development following concentric (CON) or eccentric (ECC) isokinetic training. Thirty-eight women were randomly assigned to either CON or ECC training groups. Training consisted of knee extension and flexion of the nondominant leg three times per week for 20 weeks (SD = 1). Eccentric training increased ECC knee extension and flexion peak torque more than CON training. The ECC group improved acceleration time and time to peak torque with ECC movements versus the CON group. Slow-velocity ECC isokinetic training yielded greater ECC and similar CON torque development gains versus CON training over the course of 20 weeks in young women.  相似文献   

浅谈田径教学中的优化组合   总被引：1，自引：0，他引：1  

张明莲 《四川体育科学》2003,(4):84-85

在总结传统教学经验的基础上，对教师的知识结构、教学内容、教学方法、实践性教学以及教学评价等进行优化组合，指出优化组合是田径教学改革的关键，优化教师知识结构是田径教学改革的前提和基础，优化课程结构和教学内容是田径教学改革的重点。  相似文献   

论体育健身锻炼中的多因素组合     

潘国斌  赵晓红 《体育成人教育学刊》2003,19(3):49-50

体育健身锻炼效应是由不同因素组成的。通过对社区化人群健身锻炼多因素组合影响进行了较长时间的研究，初步建立了不同年龄组健身锻炼心率负荷参数，旨在为指导大众健身锻炼提供有益的参考。  相似文献   

龙岩市社区群众体育现状调查与对策研究   总被引：3，自引：0，他引：3  

邱应龙  黄华祥  黄强  林宇峰  唐月香  卢玉龙  彭宗跃 《体育科学研究》2003,7(3):23-30

运用文献资料、问卷调查、数据统计等方法，对龙岩市所属7个县、市、区城镇办事处、社区居民委员会的体育组织形式与网络特征和18岁—60岁以上社会各阶层人群进行大规模的社会学的调查。研究结果表明：龙岩市群众体育事业有了较大的发展；城镇居民的体育意识、行为和消费等方面都发生了很大的变化；但与沿海地区相比，仍有较大的差距；探寻存在问题的原因，提出调动各阶层人群参与体育活动的对策与措施。  相似文献   

2002世界杯足球决赛中国队守门员位置防守技术运用分析     

张强  张力  董向荣  张立平 《四川体育科学》2003,(4):43-45

主要运用观察和统计归纳的方法，对中国队参加第17届世界杯足球赛决赛阶段比赛的守门员位置防守技术运用情况进行分析。结果表明，判断选位与反应能力的不足，导致中国队守门员防射门技术运用失误增多，防守的成功率降低；比赛中中国队守门员把握出击的能力低，出击欠灵巧机变，强对抗条件下难以有效发挥位置防守优势，守门员技术稳定是心理稳定的体现，训练实践中既要加强守门员意识引导，更要加强守门员意志的培养，努力改变比赛中守门员技术不过硬的现状。  相似文献   

论中长跑的早期化训练   总被引：2，自引：0，他引：2  

左晓东 《体育成人教育学刊》2003,19(3):84-85

对少年儿童在中长跑项目的早期化训练问题，从中长跑项目的本身特点和少年儿童的身体发育特点方面进行了分析和探讨，认为中长跑项目的早期化训练是可行的，也是必要的，并提出了进行早期化训练应注意的问题。  相似文献   

Sound and unsound options for reform     

Chester E. Finn 《Academic Questions》2005,18(1):79-86

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