全文获取类型
收费全文 | 532篇 |
免费 | 2篇 |
专业分类
各国政治 | 26篇 |
工人农民 | 9篇 |
世界政治 | 54篇 |
外交国际关系 | 22篇 |
法律 | 254篇 |
中国政治 | 2篇 |
政治理论 | 161篇 |
综合类 | 6篇 |
出版年
2022年 | 4篇 |
2020年 | 6篇 |
2019年 | 8篇 |
2018年 | 10篇 |
2017年 | 16篇 |
2016年 | 16篇 |
2015年 | 10篇 |
2014年 | 19篇 |
2013年 | 58篇 |
2012年 | 11篇 |
2011年 | 12篇 |
2010年 | 20篇 |
2009年 | 14篇 |
2008年 | 13篇 |
2007年 | 23篇 |
2006年 | 14篇 |
2005年 | 21篇 |
2004年 | 19篇 |
2003年 | 18篇 |
2002年 | 13篇 |
2001年 | 8篇 |
2000年 | 7篇 |
1999年 | 16篇 |
1998年 | 14篇 |
1997年 | 6篇 |
1996年 | 5篇 |
1995年 | 7篇 |
1994年 | 6篇 |
1993年 | 5篇 |
1992年 | 9篇 |
1991年 | 4篇 |
1990年 | 8篇 |
1988年 | 9篇 |
1987年 | 7篇 |
1986年 | 6篇 |
1985年 | 7篇 |
1984年 | 9篇 |
1983年 | 6篇 |
1982年 | 5篇 |
1980年 | 3篇 |
1979年 | 3篇 |
1978年 | 3篇 |
1976年 | 6篇 |
1975年 | 3篇 |
1973年 | 10篇 |
1972年 | 3篇 |
1970年 | 3篇 |
1969年 | 3篇 |
1968年 | 6篇 |
1967年 | 5篇 |
排序方式: 共有534条查询结果,搜索用时 0 毫秒
101.
During the recent economic recession, the foreclosure crisis drew vast attention from scholars and policymakers. Numerous studies focused on factors resulting in foreclosures, the impact of foreclosures, and the relationship between neighborhood attributes and foreclosures. Fewer studies investigated the foreclosure resale mechanism by focusing on buyer characteristics and the market duration of foreclosed properties. This research uses foreclosed residential properties in Broward County, Florida, between 2007 and 2011 to explore how market segmentation by assessed value relates to time on market of foreclosed properties. This research finds that extremely low-value properties and very high-value properties generally take longer to sell. Mid-value properties take a shorter time to sell. After controlling for housing attributes and market segmentation, certain neighborhood characteristics, such as lower percentage black population, lower percentage Hispanic population, lower educational attainment, and higher homeownership rate, are associated with increased likelihood of a real estate owned property being sold. These results will help policymakers determine better strategies for the foreclosure resale process. Special attention should focus on properties taking longer to sell or not able to sell during certain time frames to alleviate the negative effects of these properties on neighborhoods. 相似文献
102.
Walter Peeters 《Astropolitics》2013,11(1):27-38
Not only astronauts, but also many space-related scientists have made remarkable contributions to the development of a more philosophical view of society. These contributions are illustrated by numerous works produced by famous space pioneers at the end of their careers. The link between science and philosophy is well acknowledged, but the two disciplines suffered a schism some 350 years ago. Now one could ask the question of whether the time has not come to merge both disciplines again. This precise theme can be found in many works and papers written by space scientists. In attempting to create a better understanding of the relation between space and philosophy, it is worthwhile to consider some characteristics of the space workforce. Comparisons have been made between this workforce and so-called “corporate Ronins”—independent and unconventional thinkers who are attracted by the challenging environment offered by space activities. These individuals' presence in the space workforce could therefore be a viable explanation for the philosophical dimension associated with space activities. 相似文献
103.
104.
A. Walter Dorn 《Intelligence & National Security》2013,28(3):440-465
For most of its history the United Nations was reluctant to deal with intelligence and major powers were reluctant to share intelligence with it. But as the UN's peacekeeping operations intensified in some of the world's hot spots in the early 1990s, the UN found it both necessary and wise to create an information analysis capability at UN headquarters in New York. To funnel selected intelligence to the headquarters, several countries (including the US, UK, France and Russia) loaned intelligence officers to the UN's Situation Centre on a secondment basis. This paper describes the activities of the SitCen's Information and Research (I&R) Unit that existed from 1993 to 1999 under the informal motto ‘Keeping an Eye on the World’. Using a case study of I&R reporting on the situation in Eastern Zaire (1996), where UN-run refugee camps were under attack, it is possible to examine the nature and utility of the intelligence provided by the intelligence officers to UN decision-makers and the planners of the Canadian-led multinational force in the region. It reveals that the Unit provided significant and useful intelligence about arms shipments, belligerent activities, and the status of refugees and made several prescient predictions and warnings. The Unit sought to minimize national bias and incomplete information, though both problems were still in evidence. Still, in many ways, the I&R Unit remains a useful model for the development of a future intelligence capability. 相似文献
105.
A. Walter Dorn 《Intelligence & National Security》2013,28(2):184-207
The 1974 Cypriot War divided the island of Cyprus into two parts with a narrow demilitarized zone (DMZ) between the opposing Greek Cypriot and Turkish forces. The volatility and violence in this zone, called the ‘Green Line’, necessitated a constant UN peacekeeping presence that was achieved mainly with manned observation posts (OPs). About 150 of these posts were established by 1975 to maintain stability and prevent flare-ups, including any lethal exchanges between the two sides. By the early 1990s, many of the countries contributing peacekeepers to the United Nations Peacekeeping Force in Cyprus (UNFICYP) had become tired of the stalemate and the lack of progress in negotiations (peacemaking), so they withdrew their troops from the force. This necessitated a reduction in the number of constantly manned OPs from 51 in 1992 to 21 in mid-1993. Further downsizing of UNFICYP by the UN Security Council in 2004 gave rise to a new approach to monitor the DMZ and produce actionable intelligence. Cameras were installed in hot-spots in the Nicosia DMZ and more responsive patrols were introduced as part of the new ‘concentration with mobility’ concept. This was the first time a UN peace operation used unattended cameras to monitor a demilitarized zone. This article examines the UN's difficulties and successes using the remote cameras, especially during important incidents. Other technologies that aided UNFICYP are also reviewed for lessons that might assist an under-equipped United Nations in its watchkeeping function. 相似文献
106.
107.
108.
109.
110.