全文获取类型
收费全文 | 91篇 |
免费 | 0篇 |
出版年
2020年 | 1篇 |
2019年 | 3篇 |
2018年 | 4篇 |
2017年 | 3篇 |
2016年 | 4篇 |
2015年 | 1篇 |
2014年 | 2篇 |
2013年 | 26篇 |
2012年 | 4篇 |
2009年 | 3篇 |
2007年 | 2篇 |
2006年 | 2篇 |
2005年 | 1篇 |
2004年 | 3篇 |
2003年 | 3篇 |
2002年 | 4篇 |
2001年 | 2篇 |
1999年 | 2篇 |
1998年 | 1篇 |
1996年 | 1篇 |
1995年 | 3篇 |
1992年 | 1篇 |
1991年 | 2篇 |
1989年 | 1篇 |
1988年 | 2篇 |
1987年 | 1篇 |
1986年 | 1篇 |
1985年 | 1篇 |
1982年 | 1篇 |
1980年 | 1篇 |
1979年 | 1篇 |
1974年 | 1篇 |
1972年 | 1篇 |
1971年 | 1篇 |
1968年 | 1篇 |
排序方式: 共有91条查询结果,搜索用时 15 毫秒
41.
42.
Stephen Hedetniemi 《海军后勤学研究》1968,15(3):453-458
In this paper homomorphisms are used to define four new parameters of a graph, which have to do with minimum walks in graphs satisfying certain conditions. Several bounds and exact equations are obtained for two of these parameters; a third parameter is seen to be closely related to the Traveling Salesman Problem and the question of whether a given graph is Hamiltonian. 相似文献
43.
44.
45.
Stephen Blank 《Defense & Security Analysis》2001,17(2):121-138
46.
47.
Stephen J. Cimbala 《Defense & Security Analysis》2016,32(2):115-128
The United States and Russia, in the aftermath of Russia’s annexation of Crimea and destabilization of Ukraine, seem to have ditched entirely the “reset” in their political relations. Despite this odor of Cold War redux, there remain the opportunities and necessities for renewed attention to strategic nuclear arms control as between the two governments. US and NATO missile defenses as planned for European deployment figure into this equation, although in somewhat unpredictable ways, given technological uncertainties in existing and foreseeable defenses, as well as the possibility of improved delivery systems for offensive conventional or nuclear weapons. 相似文献
48.
49.
We consider how a merger between two naturally differentiated dealers affects their interactions with a common supplier and identify conditions under which the merger can increase or decrease the combined net worth of the two firms. Among other things, we find that the attractiveness of merging depends upon the extent to which end demand can be stimulated by either an upstream supplier or the dealers. Specifically, the greater the supplier's ability to invest in stimulating end demand, the more likely it is that the naturally differentiated firms will be better off operating independently than merging. On the other hand, if the greatest opportunities for stimulating demand are through the service that is provided by the dealers, then merging their operations will be more attractive. © 2006 Wiley Periodicals, Inc. Naval Research Logistics, 2007 相似文献
50.
Stephen Tyre 《战略研究杂志》2013,36(2):97-117
Though the Gaullists and the officer class shared a common view of France's military, diplomatic and operational weaknesses during the Algerian War they did not always share ideas on solutions to the problem. The Gaullists were fixated on France's declining world status and were prepared to act opportunistically to halt it, thereby making a French Algeria expendable. The military, on the other hand, believed that keeping Algeria French was axiomatic in avoiding further national humiliation. The coming together of Gaullists and the Army in May 1958 was therefore only a shortterm alliance, which quickly crumbled. 相似文献