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   18420篇
  免费   1100篇
  国内免费   676篇
林业   4155篇
农学   622篇
基础科学   1454篇
  2358篇
综合类   6847篇
农作物   693篇
水产渔业   1070篇
畜牧兽医   1340篇
园艺   370篇
植物保护   1287篇
  2024年   80篇
  2023年   297篇
  2022年   339篇
  2021年   502篇
  2020年   561篇
  2019年   655篇
  2018年   429篇
  2017年   527篇
  2016年   673篇
  2015年   591篇
  2014年   1000篇
  2013年   1181篇
  2012年   1516篇
  2011年   1512篇
  2010年   1135篇
  2009年   1246篇
  2008年   1109篇
  2007年   1153篇
  2006年   951篇
  2005年   916篇
  2004年   712篇
  2003年   617篇
  2002年   454篇
  2001年   420篇
  2000年   352篇
  1999年   246篇
  1998年   183篇
  1997年   169篇
  1996年   139篇
  1995年   110篇
  1994年   82篇
  1993年   65篇
  1992年   69篇
  1991年   64篇
  1990年   36篇
  1989年   48篇
  1988年   33篇
  1987年   13篇
  1986年   6篇
  1985年   4篇
  1980年   1篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
211.
本文论述了中西方文化对于管理的影响,分析了中国式管理出现的文化因素,总结了中国传统文化在现代管理中可加以运用的结合点,提出应该更有自信的看待我们自己管理方式的观点。  相似文献   
212.
This paper studied how the auction processis influenced by bankruptcy probability, bankruptcy cost, and the corporatetax rate. The study found thatthe bidding price of the management is negatively associated with bankruptcy cost and probability, and positivelyassociated with the corporate tax. However, the expected profit of the outside investor is positivelyassociated with bankruptcy cost and probability, and negatively associated with the corporate tax. When the bankruptcy cost and probabilityis high enough, the acquisition market would be totally inefficient.  相似文献   
213.
214.
This paper proposes a model framework, which describes the function requirements and the common characterstics of vehicle transport management. With the frame, a computer vehicle transportation managerment information system(QCMIS)is in troduced here and it has already been put into practice. The key technical points is also explained in the paper.  相似文献   
215.
Basing eliminating on the idea that the generator who has the most influence on the power flow of line is mostly in favor of transmission congestion, the model of congestion management with the object of minimizing adjustments of bufions varied with generation outputs is proposed. It can eliminate the congestion effectively by judging the generators who should be adjusted and the amounts of adjustment. The test on IEEE-RTS24 buses system and other practical systems show that the proposed method is effective.  相似文献   
216.
In order to help tourists choose satisfying scenic spots, content hotels, convenient lines and convenient vehicles, vehicle monitoring control and scheduling management system in a scenic area is presented, which dispatches vehicle by appointments and the statistic of tourists at a sight spot and recommends the tour line by broadcasting in vehicle. Vehicle monitoring control and scheduling management system in a scenic area, a integrative vehicle management system, is an integration of GPS, GIS, trunked radio system, a management system of booking room and a tourist statistic system at a sight spot.  相似文献   
217.
The solution of the office automation system for the universities is given. The detail steps on developing an office automation system through Lotus Notes are described.  相似文献   
218.
This article presents an implement of component using COM technology for collecting environmental monitoring data in environment monitoring system. The component makes the separation of data collection and data analysis available.Simultaneously by using the interface of connectable object in COM,itmakes the cooperation of the environment monitoring software with other parts of fault management software available,and also the seamless connection.It improves the system's performance by adding extensibility and potential cooperatibility.  相似文献   
219.
The listed companies have strong motivation earnings management beforerights issue (RI) in order to achieve the qualification of equity refinancing. After dealed with a positive study on earnings management of RI in 242 Chinese list companies, it is discovered that Chinese RI firms have earnings management that is much more than developed securities market and other emerged securities market before announcing year, but there is not earnings management after announcing second third year, and it is discovered credit business is a main tool of earnings management.  相似文献   
220.
This paper focuses on the key tactics and technology in customization marketing of Third Party Logistics -design modularity of logistics product, which is be researched deeply. The modularity figure of logistics product, and depth management for modularity are constructed by adopting boston Matrix in order to avoid over-customized. Personality customization is realized through making up module differently for Third Party Logistics corporations, to satisfy the demand for customizing and responding the market fast.  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