排序方式： 共有44条查询结果，搜索用时 328 毫秒
31.
T.W. Parks 《Journal of The Franklin Institute》1974,297(4):229-242
An efficient procedure for signal representation, based on known signal properties, is presented. The representation minimizes the maximum of the ratio of the error and the signal norm, the per cent error. Signal classes are specified by normalized quadratic functionals. These results are contrasted with the theory of n-widths of signal classes, and several applications are developed. 相似文献
32.
Carmelita Pickett Jane Stephens Rusty Kimball Diana Ramirez Joel Thornton Nancy Burford 《资料收集管理》2013,38(3):165-181
Academic libraries have a long tradition of endorsing and creating written collection development policies to communicate, both internally and externally, their dynamic collection practices. As revealed by a literature search, academic libraries, over time, appear to have abandoned this practice. This article documents how Texas A&M University Libraries embraced the ambitious task of resurrecting written collection development policies and, as part of this process, assessed the current state of collection development, systematically planned for future collection growth, and identified emerging fields of research requiring additional collection support. This process also undertook the integration of collection development into the organizational culture of the libraries. Reflecting on this process, the authors present the case for creating and maintaining written collection development policies in academic libraries. 相似文献
33.
SUMMARY The state of Illinois funded a large scale Ariel project. This is a report of the project's successes and shortcomings. Although widely successful, additional training in the use of sophisticated hardware, primarily Minolta scanners, is needed. Data on sending and receiving is included. 相似文献
34.
SUMMARY Ariel files are the starting point for electronic delivery of interlibrary loan articles through ILLiad, Virginia Tech's interlibrary loan system. Despite some advantages to electronic delivery of articles to their desktops, a large majority of ILL customers continue to prefer print on paper delivery rather than electronic delivery. This fact has implications for introducing additional electronic services. Correctly choosing what services to impose on library customers, and what services to offer as value-added options, is fundamental to maintaining the credibility of libraries during these times of rapid change. 相似文献
35.
《Slavic & East European Information Resources》2013,14(1):19-26
ABSTRACT British translator and publisher of Russian technical literature Eugene Gros, evidently of Czech origin, collected over two thousand titles published in the Soviet Union from approximately 1945 to 1965. These books are now at Texas A&M University library, which introduced the books into the OCLC online union catalog from Library of Congress catalog cards while updating name entries, series, subject headings, and classification numbers. Publishers, notable authors, and titles in the Gros collection are surveyed, proceeding from power, mechanical and civil engineering, metallurgy and defense (e.g., aerospace and electrical engineering) to Academy of Sciences and popular publications on science and technology. Book title imagery and style are another perspective on the collection. 相似文献
36.
Steven L. Christopherson 《Contemporary educational psychology》1981,6(1):59-65
College students wrote summaries of eight short passages as a test of their ability to identify important information. After pairing naive summaries according to length and original passage, those summaries which judges identified as “better” were found to contain significantly more of the major semantic roles, such as Agent and Instrument, than did summaries judged “not as good.” It was also found that students wrote significantly better summaries when instructed to base the summaries on the major semantic roles within the passage. These summaries were significantly better than summaries based upon the traditional paragraph analysis of “topics” and “main ideas,” and they were significantly better than summaries written without any special instructions. 相似文献
37.
Stephen E. Guisinger James W. Henderson Gerald W. Scully 《Economics of Education Review》1984,3(4):257-267
Utilizing data from a survey of 1000 households in Rawalpindi, this study presents estimates of the rate of return to schooling and differences in these rates of return by schooling level and sector of employment. The major finding reported is that the rate of return to schooling in one of Pakistan's major urban areas is low, both in relation to the rate of return on physical capital and in relation to the rates of return to schooling in other developing countries. These low rates of return appear to be a result of a conscious government policy which drastically compressed the skill-wage structure. 相似文献
38.
公立学校的质量问题一直困扰着美国历届联邦、州政府以及基础教育界。作为对学校质量最具效率、最直接的学区来讲,如何领导区内学校走出困境、减少科层制的弊端、提高管理效率是摆在学区领导面前的一个难题。这不仅需要政策的支持,更需现代管理理论的指导以及相应的国家级学校质量评价标准的驱动,当然,还需要学区学校领导与教师的智慧与勇气。在日益强调学校管理权下移的今天,关注并做好学区层面学校管理的规划和实施将是一个研究亮点或是焦点。而美国得州BISD的成功实践已经为我们做出了很好的示范。 相似文献
39.
E-science环境迫切要求对存在于学校内部各个部门管理系统中孤立的科研数据进行搜集、聚合与可视化。以德克萨斯A&M大学数学系为例,进行基于Viewshare的学术群体的可视化,帮助院系科研人员找到潜在可能的合作者并共同开辟新的研究领域便于创建新的科研竞争优势,为学校人事管理部门的人才引进、科研部门进行科研成果的评价提供指导,为图书馆优化馆藏资源、开展学科服务提供数据支撑。基于Viewshare的学术群体可视化过程包括数据采集、数据规范与清洗、数据导入、数据多维可视化、数据分析和数据导出。 相似文献
40.
《The Reference Librarian》2013,54(67-68):257-271
Summary The Americans with Disabilities Act of 1990 (ADA) motivated libraries all over the United States to evaluate their accommodations and services to patrons with disabilities. This article presents a case study of the Texas Tech University Libraries project to meet the needs of their patrons in relation to ADA. The study focuses on including adaptive technologies in the library environment to aid blind, hearing, visually and physically-impaired patrons and increasing library staff awareness of the needs of patrons with disabilities. Findings from the study will also benefit school, public, and special libraries that are evaluating their access for patrons with disabilities. 相似文献