首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   1222篇
  免费   9篇
  国内免费   2篇
教育   820篇
科学研究   147篇
各国文化   22篇
体育   83篇
综合类   1篇
文化理论   33篇
信息传播   127篇
  2019年   21篇
  2018年   32篇
  2017年   26篇
  2016年   17篇
  2015年   16篇
  2014年   15篇
  2013年   337篇
  2012年   15篇
  2011年   31篇
  2010年   16篇
  2009年   24篇
  2008年   27篇
  2007年   25篇
  2006年   15篇
  2005年   15篇
  2004年   23篇
  2003年   13篇
  2002年   15篇
  2001年   16篇
  2000年   12篇
  1999年   15篇
  1998年   11篇
  1997年   11篇
  1996年   14篇
  1995年   17篇
  1994年   17篇
  1993年   21篇
  1992年   18篇
  1991年   13篇
  1990年   14篇
  1989年   8篇
  1988年   10篇
  1987年   16篇
  1986年   18篇
  1985年   12篇
  1984年   12篇
  1983年   10篇
  1982年   12篇
  1981年   11篇
  1980年   14篇
  1979年   16篇
  1978年   14篇
  1977年   17篇
  1976年   16篇
  1975年   10篇
  1974年   15篇
  1973年   11篇
  1970年   7篇
  1966年   9篇
  1920年   8篇
排序方式: 共有1233条查询结果,搜索用时 15 毫秒
131.
Motion Pictures     
Richard Bunce's Television in the Corporate Interest (New York: Praeger Special Studies, 1976—price not given, but about $15.00).

Ralph M. Jennings and Veronica M. Jefferson's Television Station Employment Practices, 1975: The Status of Minorities and Women (New York: Office of Communication, United Church of Christ, 1976—price not given, but about $10.00, paper)

Horace Newcomb's Television: The Critical View (New York: Oxford University Press, 1976—$4.00, paper)

Asa Berger's The TV-Guided American (New York: Walker, 1976—$8.95)

Vincent Mosco's The Regulation of Innovations in the Broadcasting Market (Cambridge, Mass.: Harvard University Program on Information Technologies and Public Policy, 1975—$3.00, paper)

James D. Scott's Cable Television: Strategy for Penetrating Key Urban Markets (Ann Arbor: University of Michigan Graduate School of Business Administration, 1976—$5.50, paper)

R.W. Chandler's Sparks at Sea: The Experiences of a Ship's Radio Officer (North Pomfret, Vt.: David and Charles, 1973, but only recently released in the U.S.—$9.50)  相似文献   
132.
Charles J. Sippl and Charles P. Sippl's Computer Dictionary and Handbook (Indianapolis: Howard W. Sams, 1976---$16.95)

Walter S. Baer, Leland L. Johnson, and Edward W. Merros's Analysis of Federally Funded Demonstration Projects (Santa Monica, Calif.: Rand Corp., R-1925, 1926, 1927-DOC, April 1976---price not given, but likely about $20.00 or so for the set, paper)

Lester G. Lindley's The Constitution Faces Technology: The Relationship of the National Government to the Telegraph, 1866-1884 (New York: Arno Press, 1975--- $22.00)

Nick Lyons's The Sony Vision (New York: Crown, 1976---$7.95)

SMPTE Journal (SMPTE Publications Office, 862 Scarsdale Ave., Scarsdale, N.Y. 10583---$3.00 for single issues)

The Classic Radio Newsletter ($5.00 per year for six issues)

Cable Television Information Center's Social Services and Cable TV (Washington: National Science Foundation, 1976---$3.10, paper, from Government Printing Office)

Charles F. Phillips, Jr. (ed.) Competition and Regulation: Some Economic Concepts (Department of Economics, Washington and Lee University, Lexington, Va. 24450, 1976-43.00, paper)

Calvin A. Kent, Richard Oppedahl, and Lynn Stephens' Municipal Franchising and Regulation: An Evaluation of Policy-Related Research (Business Research Bureau, School of Business, University of South Dakota, Vermillion, S.D. 57069---price not given, paper)

Edward Hyde's The Phone Book: What the Telephone Company Would Rather You Not Know (Chicago: Henry Regnery Co., 1976---$7.95)

Public Policy as a Determinant of Market Structure: The case of the Specialized Communications Market by Peter D. Shapiro (September 1974, Working Paper 74-10, 177 pp.)

Glossary of Costing and Ratemaking Terms in the U.S. Postal Service and the American Telephone and Telegraph Company by Arlene Karlin (January 1976, Working Paper 76-2, 28 pp.)

The U.S. Mail Network: Who Pays, Who Plays by Gordon Emrie (April 1976, Working Paper 76-3, 148 pp.)  相似文献   
133.
Nullis in verba was chosen as the motto of the Royal Society, as it embodied the culture of transparency and collaboration that were the hallmarks of the Royal Society and of the scientific method it promoted. Communication, using the tools of the day, was essential to this community of scientists as they created and shared new knowledge. Almost three hundred years later, libraries continue to advance principles relating to the importance of collaboration and transparency. This two-part article series, published jointly in International Information and Library Review and Technical Services Quarterly explores notions of transparency and collaboration in research and how these ideas are impacting the world of librarianship – from information creation, organization and access perspectives.  相似文献   
134.
Efficient air-conditioning systems facilitate climate control in modern museums, libraries, and archives. The climate in Hong Kong is typically hot and humid, so the survival of collections is highly dependent on 24-hour air-conditioning systems to maintain the desired environment in repositories of archives and books, or artefact stores. The continuous operation of such systems in turn relies on a number of factors, such as uninterrupted electricity supply, an active maintenance programme, daily monitoring of their performance and quick response to irregularities as well as backup or alternative systems to support the air-conditioning load in case they are down for servicing. From the risk management point of view, unlike the latter four factors, electricity supply is an external factor that cannot be guaranteed. Fluctuation in the power level that results in stoppage of air-conditioning equipment is not uncommon even in well-developed countries. Long power outages could be catastrophic as they might lead to irreversible damage to collection items as a result of fast, large, changes in temperature and relative humidity (RH) towards the external environment if the air-tightness or hygrothermal stability of the storage are not good enough. Understanding storage environmental stability, especially during electrical power disruptions, is an essential part of the preservation measures and disaster preparedness necessary to protect valuable collections in cultural heritage institutions in the region.  相似文献   
135.
136.
This retrospective study evaluates early semester predictors of whether or not community college students will successfully complete blended or hybrid courses. These predictors are available to faculty by the fourth week of the semester. Success is defined as receiving a grade of C- or higher. Failure is defined as a grade below a C- or a withdrawal. Method: Seven variables available to faculty are considered: gender, degree sought, students’ academic level, attendance for the first 4 weeks of face-to-face classes, scores on orientation extra credit assignments, grades on the first quiz, and grades on an early semester reflective essay. Logistic regression is used to evaluate the power of seven variables to predict successful course completion in 15 sections of two business courses: Introduction to Marketing and Marketing Research. Three hundred forty-three students were included in this study. Results show that completion of optional extra credit assignments offered during the first 2 weeks of the semester and performance on the first quiz are significant predictors of successful course completion. These results suggest that students’ self-regulation skill or learning presence in the community of inquiry model is a strong predictor of student success. A faculty-based model like the one presented here can help faculty to enhance their students’ chances of success by highlighting factors that predict successful course completion early in the semester.  相似文献   
137.
INTRODUCTION Chronic hepatitis B(CHB)remains a major public health problem,affecting more than350mil-lion people worldwide.Cirrhosis,liver failure,or hepatocellular carcinoma will develop in approxi-mately15to40percent of infected patients(Ganem and Prince,2004).Lamivudine,an oral nucleoside analogue,inhibits HBV replication(de Clercq,2001;2004;Lai et al.,1997;1998;Marcellin et al.,2004).It can markedly reduce serum HBV DNA levels and normalize alanine aminotransferase(ALT)levels …  相似文献   
138.
139.
Especially in the education of students who are deaf or hard of hearing, teachers' practical knowledge storage is almost never measured. The Survey of Practical Knowledge was used to compare the practical knowledge storage of deaf and hearing teachers of these students. Surveyed were 48 deaf and 115 hearing individuals at the preservice and in-service experience levels. Practical knowledge storage was defined as images, rules of practice, and practical principles. Results indicate that deaf teachers tend to view students as equals but are more likely to emphasize control over classroom behavior than hearing teachers. Hearing teachers tend to stress efforts to engage students in subject matter by providing variety and relating it to life experiences. Given the trend toward high-stakes testing of teachers, further research is encouraged on role differences between deaf and hearing teachers working with students who are deaf or hard of hearing.  相似文献   
140.
The study was designed to assess the development of Family Independence (FI), Peer Independence (PI), Liberalism (L), Social Conscience (SC), and Cultural Sophistication (CS) among students attending three predominantly black colleges. Responses to the Attitudes section of the College Student Questionnaires were obtained from 334 students when they were entering freshmen, end-of-year freshmen, and graduating seniors. The data were analyzed with a repeated measures multivariate analysis of variance design. College, Sex, and Time were the independent variables, and the five attitude scales were the dependent variables. The tests for the main effects of time revealed overall gains on all five scales. A significant Sex × Time interaction indicated that PI scores for males increased, while females' PI scores decreased, during the freshman year; the females' PI scores increased during the subsequent three year period. Significant College × Time interactions were found for FI and CS. College × Sex × Time interactions were significant for L and CS. The results indicated that students who attended these predominantly black colleges developed greater self-reliance and autonomy and broadened interests in political, social, and cultural affairs. The extent of change in these attitudes varied, however, according to the college attended and/or sex of the student.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号