深基坑工程安全监测和信息化监控

近年来随着深基坑工程数量的急剧增长,带来许多新的课题有待研究和解决．本文从基坑安全监测的角度对深基坑的监测项目、监测方法和研究现状进行阐述,并在此基础上对深基坑监测今后的研究方向进行展望,指出信息化施工以及建立完善的险情预警系统的重要性．     

浅谈数字图书馆与全文检索技术

本文从数字图书馆的起源、发展，以及特点和功能等方面，简要阐述了全文检索技术。     

Leader-following consensus for multi-agent systems with actuator faults via adaptive event-triggered control

In this paper, the leader-following consensus problem is investigated by event-triggered control for multi-agent systems subject to time-varying actuator faults. Firstly, for a case of the leader without control input, a distributed event-triggered fault-tolerant protocol is proposed with the help of adaptive gains. Secondly, the proposed protocol is developed by an auxiliary nonlinear function to compensate the effect of the leader’s unknown bounded input. It is shown that under the both obtained protocols the tracking errors converge to an adjustable neighborhood around the origin, meanwhile the Zeno behavior is avoided. Moreover, the protocols are fully distributed in sense that any global information associated with the network is no longer utilized. Finally, numerical examples are presented to show the validity of the obtained protocols.     

A Symbiosis of Access: Proliferating STEM PhD Training in the U.S. from 1920–2010

Minerva - Over the course of the 20th century, unprecedented growth in scientific discovery was fueled by broad growth in the number of university-based scientists. During this period the American...     

优秀游泳运动员年龄特征分析

通过对悉尼奥动会、日本福冈世界锦标赛及全国九运会游泳比赛前8名游泳运动员年龄特征的分析，重点追踪典型运动员首次创造最佳运动成绩的年龄，并结合1980年以来历届奥运会，世界游泳锦标赛冠军年龄，对游泳运动员年龄进行全面，客观的研究。     

浅析WTO绿色规则的定位及其实质

WTO绿色规则,是指WTO体系下的环保条款,即指在WTO一揽子协议中存在着的因环境保护的目的而对自由贸易所作的限制性条款。对于贸易来说,它是一种合法合理的绿色壁垒,是协调环境与国际贸易之间冲突的需要,为了贸易而保护环境,是建立国际新经济秩序斗争在国际贸易领域中的表现。     

“社会共和国”中的民主思想探析

马克思恩格斯所论述的＂社会共和国＂思想包含着丰富的民主内容。＂社会共和国＂采取普选制、随时罢免制、监督制、公职人员有限工资制和废除官僚特权制等措施来保证人民的主人翁地位。深入分析这些思想对我国的社会主义民主建设具有深刻的启发意义。     

论高校图书馆职业道德建设

本文结合学习贯彻《中国图书馆员职业道德准则 (试行 )》 ,提出了 :职业道德建设是高校图书馆建设的灵魂工程”的论断 ,分析了新时期高校图书馆职业道德的新的内涵 ,介绍了南开大学图书馆的有关措施 ,最后就加强高校图书馆职业道德建设的途径提出了对策性建议     

中国画市场：冬天到了，春天还有多远

对中国画市场来说，2006年是一个极不平常的年份。很多市场环节就像蹦极一样，让人们感受到了激烈的震荡和极不适应的错位。用不少画家，画廊的话来说，市场在6至8月份降到了冰点。     

Recruiting Principals to Lead Low-performing Schools: Effects on Job Attractiveness

This study addressed recruiting principals into low performing schools. A sample (N = 619) of principals, assistant principals, central office administrators, school counselors, and teacher-leaders from the 29th largest school district in the United States role-played as applicants for principal vacancies at schools classified as low-performing based on results of standardized student achievement tests. The study had an experimental design and involved use of a recruitment simulation. Rating jobs depicted on simulated principal recruitment announcements, principals and assistant principals rated the job highest while school counselors rated the jobs lowest. Among the teacher-leaders, teacher-administrative interns rated the job higher than did highly skilled educators or resource teachers. Implications for recruitment practice and future evaluation research are discussed.