篮球教学中检查与纠正错误方法探讨     

宋军 《兵团职工大学学报》1999,(3)

本文主要就篮球教学中检查、纠正错误的动作加以分析、研究。  相似文献   

Passages from the Bible to be Memorized by Children—Suggestions and Selections     

Mrs. W. D. MacClintock 《Religious education (Chicago, Ill.)》2013,108(3):96-100

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Transverse strength of chilled car wheel metal as affected by the relative directions of stress and chill.With some notes on the chemistry of cast iron     

Asa W. Whitney 《Journal of The Franklin Institute》1897,143(4):267-278

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The resistance to corrosion of some light aluminium alloys     

Joseph W. Richards 《Journal of The Franklin Institute》1895,139(1):69-72

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The reduction or alumina considered from a thermo-chemical standpoint     

Joseph W. Richarid 《Journal of The Franklin Institute》1895,139(4):295-304

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Bifurcation analysis of a microcantilever in AFM system     

Neng-Sheng Pai  David T.W. Lin 《Journal of The Franklin Institute》2010,347(7):1353-1367

The atomic force microscope system (AFM) has become a popular and useful instrument to measure the intermolecular forces with atomic resolution that can be applied in electronics, biological analysis, materials, semiconductors, etc. This paper studies the bifurcation phenomenon and complex nonlinear dynamic behavior of the probe tip between the sample and microcantilever of an atomic force microscope using the differential transformation method. The dynamic behavior of the probe tip is characterized with reference to bifurcation diagrams, phase portraits, power spectra, Poincaré maps, and maximum Lyapunov exponent plots produced using the time-series data obtained from differential transformation method. The results indicate that the probe tip behavior is significantly dependent on the magnitude of the vibrational amplitude. Specifically, the probe tip motion changes from T-periodic to 3T-periodic, then from 6T-periodic to multi-periodic, and finally to chaotic motion with windows of periodic motion as the vibrational amplitude is increased from 0 to 5.0. Furthermore, it is demonstrated that the differential transformation method is in good agreement for the considered system.  相似文献   

A House Divided: Community Politics and Education Reform in Detroit     

Jelier  Richard W.  Hula  Richard C. 《The Urban Review》1999,31(1):3-29

This research investigates the inherent dilemma evident in attempts to promote decentralization initiatives in urban public schools. Detroit provides a natural experiment in decentralized education reform given both the collaborative and the competitive reform efforts that were advanced between 1988 and 1994. A collaborative partnership, the Detroit Compact, was created, and schools of empowerment and choice were partially implemented, conceptually designed to enlarge the community role in the operation of the schools. Results indicate that efforts at promoting decentralization, over time may produce counterpressures to recentralize decision making.  相似文献   

伦理自然主义的还原论与非还原论之辩     

杨松 《科学技术与辩证法》2010,27(2):26-30

自然主义伦理学内部有还原论与非还原论两个派别。以哈曼为代表的还原论和以斯德津为代表的非还原论展开了持久的争论,针对道德性质的解释力、道德副现象论等问题进行辩驳。这两个流派都是自然主义伦理学中极为重要的分支,因此对双方理论的探讨有利于深化学界自然主义伦理学的研究。  相似文献   

Technique in the construction of a teacher's own objective tests     

H. W. James 《Peabody Journal of Education》2013,88(4):240-243

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同分布条件下局部次指数随机变量和的有界性     

宋佳星 《科技广场》2010,(10)

记s△为局部次指数分布族,F、G是s△中两个不同的局部次指数分布,Gn*表示的是G自身的n重卷积,在上述条件下,Asmussen(2003)介绍了Gn*(x+△)/F(x+△)的相关界.本文所研究的是把上式中Gn*换成Fn*,考虑在同分布条件下Fn*(x+△)/F(x+△)的相关界,其中Fn*是分布F自身的n重卷积.  相似文献