等熵Chaplygin气体动力学系统的广义黎曼问题

研究等熵Chap lygin气体动力学方程组的广义黎曼问题.首先,得到了该系统的柯西问题存在唯一的整体C1解;其次,在适当的初值条件下,借助特征分析方法,使用广义Rank ine-Hugon iot条件和熵条件,证明了包含δ-波的整体间断解的存在唯一性.     

Terahertz磁波参量振荡器辐射THz波受温度的影响

从THz波增益、吸收系数、折射率几方面,讨论了THz电磁波参量振荡器辐射THz波受温度的影响,从而得到THz波增益随温度的升高而降低主要原因,是由于LiNbO3晶体中A1对称光学软模的拉曼活性降低所导致,这为今后太赫兹（THz）波参量振荡器的优化设计提供了参考价值。     

Outside the Exhibit Case

Summary

In planning for a major traveling exhibit in UCLA's undergraduate library outreach was a priority. Programming and publicity targeted segments of the campus and community both as participants and as attendees. This collaboration came to fruition in an exciting array of programs that brought many people into the library and demonstrated the strengths of collections, resources and services to new audiences.

UCLA's College Library, the undergraduate library that recently returned to its historic and award-winning Powell Library Building, was a site for the ALA-Smithsonian traveling exhibition, “A More Perfect Union: Japanese Americans and the United States Constitution.” The Programs and Exhibits Committee of the Library surrounded the display of this material with several months' worth of diverse community and campus programming. Events involved staff, faculty, students, local K-12 teachers, members of the Los Angeles Japanese American Community, writers, film makers, even a movie star (this IS Los Angeles)! In addition to highlighting the strengths of UCLA's Library collections through traditional means, a variety of media and multimedia programs and events supplemented the exhibit.     

利用指数函数法求Kudryashov-Sinelshchikov方程的精确行波解

Kudryashov-Sinelshchikov(K-S)方程具有重要的物理背景和研究意义,很多学者对其精确解进行了研究,在=-3和=-4时得到了各种形式的精确行波解.本文利用指数函数法对该方程的精确行波解进行了研究,获得了该方程在任意参数条件下具有一般形式的精确行波解,包括孤立波解和周期波解,将原有的结果进行了有效的推广.     

Equivalent response estimation of structural systems subjected to long-period ground motion

Long-period ground motion has become an important consideration because of the increasing number of large and long-period structures. Therefore, a thorough investigation on the formation and characteristics of longperiod ground motion is desirable for engineering applications. In this work, an analytical study is performed to examine the effect of several parameters and the combining mode for equivalent harmonic components on the dynamic response of systems. The results of the work show that the harmonic components in equivalent ground motion are evidently influenced by the intensity rise time, duration, phase and combining mode. Moreover, the long-period ground motions are simplified and simulated by separate harmonic components through proper combination. The findings of the work are believed to be useful in the selection of input ground motion in structural seismic analysis.     

基于MSP430光栅信号的四细分及辨向技术

介绍了一种原理简单且实用的光栅信号四细分辨向技术.它利用MSP430单片机的捕获功能实现对光栅正交方波信号进行软件四细分,测量的距离可以通过液晶显示器直接显示出来,并将信号通过MODBUS总线传送到上位机.     

基于SEM的高铁时代出游行为机理测度模型研究

高速铁路的大规模运行为区域旅游产业带来了新的发展契机,同时也对需求引导下的产业要素供给与优化配置提出了新的要求。根据交通行为理论,作为一种快捷、高效的交通工具,高铁所特有的"时空压缩"特性从旅游出行动机、旅游过程中的活动参与情况和旅游出行特征三个方面对游客的出游行为产生了不同程度的影响。SEM(结构方程模型)是测度行为机理的典型分析工具,据此构建的研究假设和概念模型可以为高铁驱动下的出游行为结构链条的变迁以及趋势的定性解构和定量测度与验证构建一套概念框架与逻辑思路,为进一步展开实证分析提供理论启示与操作步骤;这对完善高铁时代沿线旅游供需要素配置和配套政策也具有一定的参考价值。     

民国时期东北移民与东北地区的开发

关内各省向东北移民,在民国时期形成了空前的高潮。移民大量迁入东北,促进了东北人口的迅猛增长,促进了东北大量荒地的开垦及耕地数量的较大幅度增长,也促进了东北铁路的发达,工商业的发展,城市的繁荣,同时大量的移民也加速了黑龙江省、吉林省、奉天省的全面开发。     

辛亥革命与民初民营化浪潮

辛亥革命对近代中国社会经济转型产生了深刻影响。辛亥革命促使了民初实业热潮的高涨,推动了民初民营化思潮的勃兴,激励了民间经办实业热情的迸发。民营企业取代官办、官督商办、官商合办企业而成长为中国民族企业主力军的序幕随之拉开,诞生于19世纪60、70年代的中国现代企业发展轨迹,由此发生了显著转折。     

世界文明转型与“第三波现代化”——在韩国全北大学的讲演

当代文明正处于转型阶段,其代表特性即＂第三波现代化＂。18世纪以后的西方大工业化是第一波现代化运动,20世纪70年代崛起的＂亚洲四小龙＂是第二波现代化,而21世纪的＂金砖四国＂经济发展是第三波现代化。作为世界现代化的不同阶段考察,这是对世界现代化进程的一种新观念。作者认为,第三波现代化的主体思想是辩证理性而不是技术理性,是在多元文化语境中的理论更新。第三波现代化的代表形态是中国文化,这是辩证理性指导下的现代化模式。