汽车用激光测距仪的设计

激光测距有脉冲测距、相位激光测距和脉冲-相位激光测距三种方法,简单测距仪的结构原理包括测距方程,激光反射机和激光接口器;激光测距仪配备于汽车上,不仅可提高汽车的安全系数,也为汽车智能仪提供了可能。     

浅谈高中数学中类比推理的应用

类比推理具有猜测和发现结论、探索和提供思路的作用,有助于创新思维的培养,故而在数学教学中经常使用。     

基于数字多波束形成的比幅测向法

面对现代战争的超视距要求,需要通信侦察装备具有很高的侦测灵敏度,尤其是侦测各种天波、散射及旁瓣信号。为此,提出将数字波束形成算法与比幅测向相结合,在空域与频域同时处理阵列信号,以此来提高系统的测向灵敏度和测向精度,仿真结果表明该方法要明显优于相位干涉仪测向法。     

Bibliographies of East European Newspapers at the Library of Congress

This article traces the development of recent bibliographies of East European newspapers held by the Library of Congress. Since 2006 the European Division of the Library of Congress has placed ten newspaper bibliographies onto its website for the following countries: Bosnia and Herzegovina, Bulgaria, Croatia, Hungary, Hungary 1956, Kosovo, Macedonia, Montenegro, Russia, and Serbia, as well as a mixed newspaper/journal bibliography of the Soviet independent press, 1985–1992. The author covers topics such as the need for such bibliographies, their collection development benefits, the difficulty in maintaining their currency, and their popularity based on website statistics.     

Encoded Archival Description: Are Finding Aids Boundary Spanners or Barriers for Users?

ABSTRACT

The article reports the results of a usability study of an EAD interface. Findings indicate that subjects had trouble understanding archival terminology and how best to search for information in finding aids. Furthermore, they were not familiar with the structure or contents of finding aids. In addition to building interfaces that minimize archival jargon and rely heavily on users' prior understanding of hierarchical finding aids, this study indicates that users require new forms of virtual reference assistance in the online environment.     

Describing Anything That Walks

ABSTRACT

Anchored on the Vietnamese American Project (VAP), this essay presents the documentation of the Vietnamese American Experience through the voices of ethnic Vietnamese in Orange County, California, home to the largest concentration of this ethnic group outside Vietnam. Groundbreaking in its approach and method, VAP is an open forum that enables community assessment, self education, public memory preservation, and the first step toward understanding Vietnamese America and the Vietnamese diaspora. The cross-sectional narratives encompass transcontinental accounts of first and 1.5 generations of Vietnamese refugees and their children, and subsequently focus on their coming to terms with their second home in America, dwelling on how ethnic Vietnamese have negotiated with political turmoil, socioeconomic changes, and cultural identity. The paper, as the VAP, bridges cultural and linguistic barriers, connecting the native land and the adopted country. In short, the paper through its synthesis of the VAP: (1) gives a timely response to the urgent needs to understand and study the ethnic Vietnamese community in Orange County, providing much-needed primary data on the respective population for the ethnic communities and interdisciplinary scholarship; (2) serves as a healing process for members of the Vietnamese American community in Orange County and other victims of war; (3) sheds light onto intra- and inter-ethnic relations, fostering community consolidation, forging cross-cultural collaborations, and nurturing racial harmony; (4) contributes to an important period in American history with perspectives that are lacking in the extant literature; and (5) will conduce peace by bringing out the human experience in America's longest war.     

Giving Structure to Legacy Finding Aids Before Conversion to EAD: The Case of the Archives Départementales des Pyrénées-Atlantiques,France

SUMMARY

At the Archives Départementales des Pyrénées-Atlantiques, the encoding of more than forty legacy finding aids written between 1863 and 2000 is part of a program of digitization of the collections. Because of the size of the project, an external consultant, ArchProteus, has been brought in and specific management procedures have been put in place within the institution. The conversion has allowed the testing and verification of the flexibility of the EAD DTD, despite the various hurdles negotiated throughout the project, such as the necessity of reengineering finding aids, and standardizing index terms, etc. It becomes clear that a conversion project–in this case, a retrospective conversion–will lead the archivist to rethink the production of finding aids and the relationship with users and patrons.     

“立法”立场的法律发现——以历史法学为切入点

在对法律发现的理解上,主要有两种观点:一是从法的起源角度,另外是从法的适用的角度。目前,学界则更多是从司法视角去透视法律发现理论,立法立场的法律发现观鲜有提及。以历史法学为切入点,剖析立法立场的法律发现观的产生背景、观点及其影响,期待对该理论有个"全景式"理解。     

个人信息管理行为研究

本文阐述了个人信息管理的发展历程.对PIM及其相关概念进行了分析,以用户对信息的需求为中心.总结出人们进行PIM行为的三个基本过程--信息发现/再现行为、信息保持行为、元行为:描述了用户在进行这些活动时所面临的困难,为用户PIM三大行为过程的后续研究提供参考.