浅谈罚球在篮球比赛中的应用

随着篮球运动朝着高速度、高空优势、高超技巧的方向发展,比赛中的对抗日趋激烈,投篮时的犯规和侵人的犯规也越来越多,罚球的次数也就随之增加。通过讨论篮球运动规则和技战术发展等说明罚球在现代篮球比赛中的地位,探讨影响罚球命中率的主要因素。     

“症候阅读”策略与英文文学作品阅读

法国结构主义学者阿尔都塞“症候阅读”策略对英文文学作品阅读有很大的指导意义。读者在阅读英文作品时,应追索文本中显露出来的“症候”,发掘出原文深处的“总问题”,达到真正理解作品的目的。     

Modelling of ultrasonic motor with dead-zone based on Hammerstein model structure

The ultrasonic motor （USM） possesses heavy nonlinearities which vary with driving conditions and load-dependent characteristics such as the dead-zone. In this paper, an identification method for the rotary travelling-wave type ultrasonic motor （RTWUSM） with dead-zone is proposed based on a modified Hammerstein model structure. The driving voltage contributing effect on the nonlinearities of the RTWUSM was transformed to the change of dynamic parameters against the driving voltage. The dead-zone of the RTWUSM is identified based upon the above transformation. Experiment results showed good agreement between the output of the proposed model and actual measured output.     

3D printing of bioinspired compartmentalized capsular structure for controlled drug release

Journal of Zhejiang University-SCIENCE B - Drug delivery with customized combinations of drugs, controllable drug dosage, and on-demand release kinetics is critical for personalized medicine. In...     

Knowledge city research and practice under the microscope: a review of empirical findings

The changing and challenging conditions of the 21st century have been significantly impacting our economy, society and built and natural environments. Today generation of knowledge, mostly in the form of science, technology, engineering, mathematics, and arts, is seen as a panacea for the adaptation to changes and management of challenges. Making space and place that concentrate on knowledge generation, exchange, and marketing has become a priority for many nations. Consequently, the concept of knowledge city is coined at the beginning of the century and since then it is widely researched and practiced. This paper aims to scrutinise and provide a clear understanding on the evolution of knowledge city research and practice. As the methodological approach, the study employs systematic review of the knowledge city empirical studies in peer-reviewed journals. The findings shed light on the emerging patterns, identify research and practice gaps, and point out research directions to advance the field.     

政府部门间信息共享的研究述评

回顾了组织间信息共享的研究进展,从理论模型、信息生态、影响因素和经济学分析四个方面,对政府部门间信息共享的研究进行了具体分析,并探讨了进一步的研究方向.     

从沈履伟案反思学术腐败问题

2003年夏,天津外国语学院汉学院副教授沈履伟在申报教授职称时,用新近出版的《求是集》作为科研成果公示,引起天津市语言学会会员、天津外国语学院一些教师的怀疑。他们陆续发现其中10篇文章是对别人署名发表过的论文的全文抄袭。但天津外国语学院教师对沈履伟剽窃问题的揭露,却得不到校领导的正     

我国风险投资基金管理模式探析

伴随着近年来风险投资研究热潮的兴起，国内学者对是否在我国推行有限合伙制有很大争议。本文在分析有限合作制治理效率的基础上，认为在不同的法律环境中完全可以通过其他的组织安排来模拟有限合作制运作。近年来，一种新的风险投资制度安排——管理公司模式在中国的兴起，从一个侧面也说明了，有限合伙制独特的税收方式、报酬机制并不是起决定作用的。     

对称矩阵特征向量的神经网络求解

对已有的一种用于求解正定矩阵特征向量（特征值得数为１）的人工神经网络进行了研究。通过细致的数学分析，得出用这种网络同样能求出一般对称矩阵最大（最小）特征值对应的特征向量。     

多功能组合镜的构思与设计

随着科学技术的发展 ,人们以传统的姿势看电视 ,手持望远镜和放大镜观察景物的观察方式和方法越来越显示其制约人们的观看效率和质量的弊端。本文以获专利权的“多功能组合镜”的构思、结构和功能为例 ,对变更传统观察方式的途径和手段作初步的探讨。构思之一　反射代替折射和全内反射现有的仰视镜及潜视镜 ,大多数是采用三棱透镜折射和全内反射的原理做成的。但经过对三棱镜的光学特性的分析 ,发现如果将其用于日常生活中 ,则存在折射倾向角的调节范围受入射角及顶角的制约 ,而两次全内反射则受两块三棱镜相对位置的制约 ,从而影响可视角度…