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   2061篇
  免费   22篇
  国内免费   4篇
教育   1522篇
科学研究   185篇
各国文化   21篇
体育   167篇
综合类   12篇
文化理论   38篇
信息传播   142篇
  2023年   5篇
  2022年   22篇
  2021年   45篇
  2020年   55篇
  2019年   96篇
  2018年   123篇
  2017年   121篇
  2016年   88篇
  2015年   63篇
  2014年   72篇
  2013年   330篇
  2012年   71篇
  2011年   58篇
  2010年   69篇
  2009年   44篇
  2008年   50篇
  2007年   50篇
  2006年   43篇
  2005年   73篇
  2004年   74篇
  2003年   97篇
  2002年   74篇
  2001年   65篇
  2000年   37篇
  1999年   23篇
  1998年   8篇
  1997年   7篇
  1996年   9篇
  1995年   17篇
  1994年   10篇
  1993年   6篇
  1992年   6篇
  1991年   12篇
  1990年   7篇
  1989年   13篇
  1986年   6篇
  1985年   6篇
  1984年   4篇
  1983年   4篇
  1982年   8篇
  1981年   6篇
  1980年   7篇
  1978年   5篇
  1977年   7篇
  1975年   4篇
  1974年   8篇
  1973年   4篇
  1967年   4篇
  1966年   6篇
  1963年   6篇
排序方式: 共有2087条查询结果,搜索用时 78 毫秒
151.
ABSTRACT

The recruitment of athletes with limited resources is a global problem in professional sports. In US Major League Baseball, the experience of the Oakland Athletics’ general manager in the last decade turned his “Moneyball” model into a synonym of quantitative analysis in the transfer market of baseball players. His strategy focused on hiring players with outstanding technical skills but relatively low market value. This study adapted this model to the framework of a multiple criteria decision aid (MCDA), by selecting undervalued players who have complementary abilities. The novelty here refers to the joint use of four algorithms explored by the composition of probabilistic preferences (CPP) (i.e., ranking, classification, dynamic evaluation and regularity analysis) and their application to soccer player performance evaluation. The new model analysed the recent transfer of a left-back soccer player to Europe. The results indicated 12 opportunities for better investment, among 32 left and right-back players considered. Two years later, the value of the same player was considerably lower. He played only five matches in the 2018–2019 season, without scoring or providing any assists. On the other hand, the players better classified by the CPP-MB model presented higher performances and market values.  相似文献   
152.
ABSTRACT

Videogames often confront players with frustratingly difficult challenges, fearsome enemies, and tragic stories. As such, they can evoke feelings of failure, sadness, anger, and fear. Although these feelings are usually regarded as undesirable, many players seem to enjoy videogames which cause them. In this paper, I argue that player misery often originates from a fictional or lusory attitude which brackets game events from real-life, making the player’s emotions solely relevant within the game context. As they are part of the game themselves, these negative emotions can be enjoyed and easily relativized, since players can acknowledge that their cause is ‘only a game’. However, there are feelings of misery associated with the playing of videogames which are not caused by either the game’s fiction or challenge. In the last part of this paper, I describe a qualitatively different kind of player misery: one that is caused by elements that are not perceived as part of the game by the player, and is not bracketed from real life by a lusory or fictional attitude.  相似文献   
153.
BACKGROUND: Because of the expense of updating practice guidelines, recent attention has focused on approaches that can reliably assess any updating required. Shekelle et al. (Journal of the American Medical Association 2001, 286, 1461-7) proposed using limited literature searches with expert involvement to reduce resources used in assessing whether a guideline needs updating. OBJECTIVES: This study compared Shekelle's method and the traditional systematic review method regarding comprehensiveness and effort. METHODS: Two research teams translated critical key questions on screening test treatments and outcomes to Medical Subjects Headings (MeSH) and search strategies. They refined Shekelle's method over three iterations, seeking greater efficiency. Using both methods independently, teams assessed the need to update six topics from the 1996 Guide to Clinical Preventive Services (US Preventive Services Task Force). Outcomes included completeness of study identification, importance of missed studies and effort involved. RESULTS: The revised review approach produced fewer citations than the traditional approach and saved time, identifying fewer eligible studies than the traditional approach. None of the studies missed was rated important by the experts consulted. CONCLUSIONS: The revised review approach provides an acceptable method for judging whether a guideline requires updating. Librarians were an integral part of the research process that streamlined the searches.  相似文献   
154.
Given the importance of survey measures of online media use for communication research, it is crucial to assess and improve their quality, in particular because the increasingly fragmented and ubiquitous usage of internet complicates the accuracy of self-reported measures. This study contributes to the discussion regarding the accuracy of self-reported internet use by presenting relevant factors potentially affecting biases of self-reports and testing survey design strategies to improve accuracy. Combining automatic tracking data and survey data from the same participants (N = 690) confirmed low levels of accuracy and tendencies of over-reporting. The analysis revealed biases due to a range of factors associated with the intensity of (actual) internet usage, propensity to multitask, day of reference, and the usage of mobile devices. An anchoring technique could not be proved to reduce inaccuracies of reporting behavior. Several recommendations for research practice follow from these findings.  相似文献   
155.
156.
In order to find new ways of growing the market, the Dutch General Publishers Association developed an innovation-competition for startups worldwide to bring innovative thinking and ideas into the Dutch Publishing Industry. The competition is the first and only program dedicated to startups leveraging new and creative business ideas around all the elements of book publishing and has its second edition this year. The competition is for startups, who are active in areas such as publishing automation, book retail, data analytics, authoring, book content development, and audience engagement.  相似文献   
157.
教师素质是素质教育的基石 ,是创新教育的关键。只有充分认识到提高教师素质的紧迫性和重要性 ,不断提高教师的素质 ,更新教育观念 ,才能培养出高素质的教师 ,从而提高教学水平 ,促进教育事业的发展  相似文献   
158.

Governing boards have a long tradition and prominent role in U.S. higher education. The diversity of institutional types, and thus governing boards, represents a multifaceted tapestry of functions, roles, and responsibilities. This paper will attempt to define the parameters of public higher education governing boards in the USA and offer critical insights into their degree of effectiveness. It is the author’s position that both positive and negative lessons can be learned through an examination of these public governing boards in the USA. The recent emergence of university boards in Europe is examined and their characteristics are compared against the characteristics of public and private boards in the USA.

  相似文献   
159.
Filipino parents’ school choice and loyalty: a factor analysis   总被引:1,自引:1,他引:0  
This quantitative study aims to ascertain the significant relationship existing between parents’ profile, and their school choice and school loyalty. Data were gathered using the researcher’s two-part made instrument. Respondents were first asked to fill in a robotfoto for purpose of profiling their baseline characteristics and were later asked to rate listed indicators, using a modified 8-point Likert scale. Using statistical tools such as the ANOVA, factor analysis, correlation, mean, and standard deviation, data were treated indepth. It is interesting to note that although parents are loyal to their alma mater, this does not have a much impact on their choice of school for their children. On the whole, parents’ choice of school is based on its indispensable qualities. Among the three interval-scale profiles of the parent respondents such as age, income, tuition fee payment and number of children, none of these relate to school choice, but age, income, and tuition fee payment negatively relate to school loyalty. From their nominal-scale profiles, significant differences were noted in their school choice when grouped according to civil status, place of work, and terms of payment. With respect to school loyalty, significant differences occurred in their responses when classified according to gender, terms of payment and their active participation in the Parent-Teacher Association (PTA).  相似文献   
160.
Caring, as a universal human phenomenon, should permeate elementary, secondary and tertiary level instruction. The practice of teaching, especially at the tertiary level, is not only substantial and procedural but relational as well. To teach with a heart is the essence that makes teaching a form of caring. When teaching is viewed as a form of caring, teachers become relational geniuses in their own right. This study is an attempt to segment Filipino college students’ views (n=1000) of their teachers’ caring behavior and their orientations as cared-for individuals. The identified clusters of teacher roles that indicate caring behavior imply that acts of teaching become acts of caring depending on how the teachers, theefficient cause of education, perform their ordinary tasks in the context ofextraordinariness. Such extraordinariness spells out a big difference in the way teachers practice the so-calledsingle loop caring or caring visibility anddouble- loop caring or caring presence. The former refers to teaching from the heart while the latter pertains to teaching with a heart. Interestingly, the extent to which teachers’ caring behavior is felt and experienced by the students positively shapes their orientations as cared-for individuals.  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