全文获取类型
收费全文 | 136606篇 |
免费 | 3216篇 |
国内免费 | 2篇 |
专业分类
财政金融 | 25832篇 |
工业经济 | 11546篇 |
计划管理 | 21777篇 |
经济学 | 29085篇 |
综合类 | 1457篇 |
运输经济 | 961篇 |
旅游经济 | 2484篇 |
贸易经济 | 23463篇 |
农业经济 | 6093篇 |
经济概况 | 16843篇 |
信息产业经济 | 7篇 |
邮电经济 | 276篇 |
出版年
2021年 | 827篇 |
2020年 | 1615篇 |
2019年 | 2378篇 |
2018年 | 2287篇 |
2017年 | 2472篇 |
2016年 | 2657篇 |
2015年 | 2089篇 |
2014年 | 3393篇 |
2013年 | 15250篇 |
2012年 | 4186篇 |
2011年 | 4121篇 |
2010年 | 3681篇 |
2009年 | 4295篇 |
2008年 | 3860篇 |
2007年 | 3221篇 |
2006年 | 3569篇 |
2005年 | 3558篇 |
2004年 | 3112篇 |
2003年 | 2881篇 |
2002年 | 2847篇 |
2001年 | 2647篇 |
2000年 | 2595篇 |
1999年 | 2464篇 |
1998年 | 2318篇 |
1997年 | 2375篇 |
1996年 | 2217篇 |
1995年 | 2015篇 |
1994年 | 2038篇 |
1993年 | 1993篇 |
1992年 | 2060篇 |
1991年 | 1979篇 |
1990年 | 1832篇 |
1989年 | 1676篇 |
1988年 | 1613篇 |
1987年 | 1627篇 |
1986年 | 1714篇 |
1985年 | 2464篇 |
1984年 | 2347篇 |
1983年 | 2150篇 |
1982年 | 2022篇 |
1981年 | 1956篇 |
1980年 | 1907篇 |
1979年 | 1864篇 |
1978年 | 1660篇 |
1977年 | 1632篇 |
1976年 | 1389篇 |
1975年 | 1294篇 |
1974年 | 1186篇 |
1973年 | 1185篇 |
1972年 | 895篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
861.
862.
Foster RD 《Harvard business review》1991,69(1):14-6, 18-9, 22-5
Richard Johnson, newly appointed president of Century Airlines, knew the company's survival depended on customer service, which in turn depended on motivated employees. So he created the Century Spirit program to build team spirit by encouraging employee participation, individual initiative, and open communication. Among the program's early successes was a newspaper started by a group of flight attendants. The Plane Truth published information about benefits and work conditions as well as feature stories and humorous articles. It quickly became popular not only with flight attendants but also with pilots, machinists, and baggage handlers. As time went on, though, the Plane Truth began to run articles critical of the company. When management cut back workers' hours, the newspaper questioned what sacrifices the executives were making. When technical services released figures showing long turnaround times, the paper questioned the machinists' work ethic. Worried that customers might see the newspaper, Richard Johnson wanted to cancel it. The president of the flight attendants union also wanted to see it go because it was stirring up trouble with the machinists. Joan Raffin, Century's human resources director, was asked to stop the publication. But she hesitated. She knew that employee morale was on the brink, but she didn't know whether the newspaper was venting workers' frustrations and reinforcing team spirit or stirring up old animosities and bringing the whole company down. Was it creating more tension than unity or vice versa? Experts on organizational change, motivation, and management analyze the situation and make recommendations for what Joan Raffin should do. 相似文献
863.
J. R. Jeffery 《International Journal of Technology and Design Education》1991,1(3):141-151
This paper has grown out of a long standing personal concern that the current approaches to design teaching are too narrowly based and that they can distort the very activity that they set out to encourage. A survey of the comments made in Examiner's Reports of pupil's work in public design examinations during 1986 & 1987 provides some insight into the difficulties that pupils experienced in carrying out their design activities.Design activity in schools developed from the beginnings initiated by the curriculum development projects of the late 1960's and early 1970's. These put forward methodical approaches to designing which have become widely used in UK secondary schools and which are now firmly embedded in the publications and project assessment framework of the current national examinations.The present study suggests that, while these methodical approaches clearly work, they imply a logical progression of thought which does not necessarily parallel the pattern of human thinking. It is recognised that pupil's design folios written up at the end of a project can be made to describe a logical, systematic procedure which has more to do with the assessment framework than the actual developments of design ideas during the project. Indeed, teachers and candidates were being actively encouraged to base their work on these structured frameworks:The actual style and quality of the folder presentation is also important. This is particularly so when working to a detailed mark scheme. Certainly it is easier to mark a folder which broadly follows the pattern of the mark scheme than one which is very erratic. Teachers are advised as to the advantages of using the mark scheme as a teaching tool and as a guide for folder presentation. NEA, 1986.Finally, the paper examines some more recent developments in the procedural models of design activity and the way in which professional designers approach their work. These insights provide an indication of the way forward for school design work and its assessment. 相似文献
864.
F. Pearson 《International Journal of Technology and Design Education》1991,1(3):152-158
This paper describes the development of a new version of Witkin's Group Embedded Figures Test (GEFT) and two further tests of a similar type using words and letters. The new form of the Group Embedded Figures Test Consists of a number of original two dimensional figures (complex and simple). Variations of the basic two dimensional figures were obtained by establishing a geometrical progression (from following a set of simple rules) to produce increasing degrees of complexity of the complex figures. This in turn generated more simple figures within them which were used in the test items.By using words and lettersas a means of generating embedded complex/simple shapes, not only are very different types of (overall) shape possible, but also the notion of field dependence/independence can (possibly) be applied to non-spatial (in the usual sense) modes of operating within the curriculum, i.e. the humanities as opposed to design and technology subject areas. 相似文献
865.
866.
Cees P. Middendorp 《Quality and Quantity》1991,25(3):235-252
An attempt is made to bridge the gap between the theorists and modellists approaches to the conceptualization of theoretical constructs. The former approach assumes that every theoretical construct has a surplus meaning over and above its operationalization and measurement as a concept. The latter approach denies this: it only accepts theoretical constructs as functions of relations between observations, i.e. measured concepts.This gap can be bridged by explicating the definition of a theoretical construct before making attempts to operationalize and measure it. An explicated definition should cover all relevant aspects (or: facets) of a construct, systematically brought together in an ideal type model. On this basis, operationalization of the construct can be directly linked to model elements, so that any possibly remaining surplus value is made explicit. The distance between theoretical construct and the measured concept can then be made as small as seems feasible; in principle, the distance can be made zero. The manner in which conservative ideology is conceptualized in a longitudinal research project in the Dutch electorate is presented as an example of this strategy. 相似文献
867.
An evaluation of onsite concurrent review over and above the effects of Aetna's precertification program demonstrated reduced utilization and expenses, especially for ancillary services, and no adverse effects on rates of medical complications. 相似文献
868.
T. Kim 《Economic Theory》1991,1(3):251-263
Summary A choice behavior of a decision maker is said to satisfy the subjective expected utility hypothesis if there exist a utility and a subjective probability such that a decision maker chooses acts with the highest expected utility. We present a revealed preference characterization of choice behavior that is consistent with the subjective expected utility hypothesis. Our result applies to any state space and compact sets of prizes and observations (either finite or infinite). 相似文献
869.
Castillo RG 《Medical economics》1991,68(17):143-4, 146-7
870.
In spite of its importance to policy makers, surprisingly little attention has been paid to the welfare effects of one aspect of trade policy-how to implement an import quota that applies to a heterogeneous product category. The government can impose a simple quota that applies indiscriminately to all goods within the product category or it can divide the quota among them with subquotas. In this paper, we analyze the welfare effects of subquotas. Under certain simplifying assumptions we find that a system of subquotas nearly always exists that provides greater welfare than a simple quota for a large country that retains quota rights or for a large or small country that gives quota rights away to foreigners. However, subquotas cannot increase the welfare of a small country that retains quota rights. The difference lies in the effect of imports on the home country's terms of trade.The views expressed in this paper are those of the authors and do not necessarily reflect the opinion of the US International Trade Commission. The authors are grateful for helpful comments on an earlier draft by anonymous referees. 相似文献