全文获取类型
收费全文 | 572篇 |
免费 | 148篇 |
国内免费 | 31篇 |
出版年
2024年 | 1篇 |
2023年 | 4篇 |
2022年 | 6篇 |
2021年 | 21篇 |
2020年 | 15篇 |
2019年 | 6篇 |
2018年 | 4篇 |
2017年 | 15篇 |
2016年 | 18篇 |
2015年 | 27篇 |
2014年 | 27篇 |
2013年 | 92篇 |
2012年 | 41篇 |
2011年 | 46篇 |
2010年 | 47篇 |
2009年 | 48篇 |
2008年 | 61篇 |
2007年 | 44篇 |
2006年 | 39篇 |
2005年 | 38篇 |
2004年 | 28篇 |
2003年 | 28篇 |
2002年 | 19篇 |
2001年 | 16篇 |
2000年 | 11篇 |
1999年 | 12篇 |
1998年 | 8篇 |
1997年 | 4篇 |
1996年 | 3篇 |
1995年 | 2篇 |
1994年 | 2篇 |
1993年 | 4篇 |
1992年 | 2篇 |
1991年 | 5篇 |
1990年 | 2篇 |
1989年 | 3篇 |
1986年 | 2篇 |
排序方式: 共有751条查询结果,搜索用时 15 毫秒
471.
Jordi Molas‐Gallart 《Defence and Peace Economics》2013,24(2):141-158
It is often stated that technological change in the military field is characterised by the introduction of radical innovations rather than by incremental processes of technological change. This article illustrates the diversity of military innovation by arguing that technological change in missiles systems is dominated by incremental change. While some large weapons platforms display the design rigidities normally associated with complex systems, missiles are characterised by “flexible modularity”. Flexible modularity facilitates the continuous introduction of upgrades, and makes missile systems amenable to gradual technological change. Besides, it has significant implications for the future role of missile systems, and poses special problems for missile disarmament and technology control initiatives. 相似文献
472.
Yang‐Ming Chang 《Defence and Peace Economics》2013,24(3):149-169
This paper presents a simple model to characterize explicitly the role that an intervening third party plays in raising the cost of rebellion in an intrastate conflict. Extending the Gershenson‐Grossman (2000) framework of conflict in a two‐stage game to the case involving outside intervention in a three‐stage game as in Chang et al. (2007b), we examine the conditions under which an outside party optimally intervenes such that (i) the strength of the rebel group is diminished or (ii) the rebellion is deterred altogether. We also find conditions in which a third party optimally intervenes but at a level insufficient to deter rebellion. Such behavior, which improves the incumbent government’s potential to succeed in conflict, is overlooked in some conflict studies evaluating the effectiveness of intervention. One policy implication of the model is that an increase in the strength of inter‐governmental trade partnerships increases the likelihood that third‐party intervention deters rebellion. 相似文献
473.
Paul Dunne María del Carmen García‐Alonso Paul Levine 《Defence and Peace Economics》2013,24(3):199-221
This paper models the determination of the defence industrial base – the number of different military systems a country decides to maintain. High R&D costs means that few countries can afford to produce major weapons systems and the producers also import systems. Non‐producers rely on imports and we assume their demand is driven by regional arms races. Military capability is determined by the number of systems and the quantity and quality of each. We examine how the defence industrial base is influenced by military expenditures, R&D costs, export controls, the nature of regional arms races and a variety of other factors. 相似文献
474.
This paper empirically re‐examines the long‐run co‐movements and the causal relationships between GDP and defence expenditures in a multivariate model with real defence expenditure per capita (ME), real GDP per capita (GDP), and real capital stock per capita (K). We apply the view of the aggregate production function to construct the empirical model. Using up‐to‐date data for 27 OECD countries and 62 non‐OECD countries for the 1988–2003 period, we combine cross‐sectional and time series data to re‐investigate the relationship between GDP and ME. Previous studies using time series data may have yielded misleading results on account of the short time span of typical datasets. By contrast, we use recently developed panel unit root tests and heterogeneous panel cointegration tests, and conclude that there is fairly strong evidence in favour of the hypothesis of a long‐run equilibrium relationship between GDP and ME. The long‐run panel regression parameter results, such as the fully modified OLS, indicate that a positive relationship between GDP and ME only holds for OECD countries, whereas a negative relationship from ME to GDP only exists in non‐OECD countries under examination and in the panel as a whole. Furthermore, by implementing the dynamic panel‐based error correction model, we determine that GDP and ME lack short‐run causalities, but do show long‐run bidirectional causalities in both OECD and non‐OECD countries. 相似文献
475.
The traditional view of the defence industry obtaining large profits from contracts with the Ministry of Defence relies on several assumptions. Among these are the use of such arrangements as an instrument of industrial policy, the strong market power enjoyed by prime contractors, and the inefficiency encouraged by the sector. The findings show that defence contracts have a positive effect on profits, as well as the prizes for innovation and the market power enjoyed by some defence subsectors. 相似文献
476.
This paper investigates the empirical relationships between military expenditure and unemployment rates. A set of global panel data on 46 countries is utilized, and a panel data version of the Granger causality test is applied. The results indicate that there is little evidence of the causality running from unemployment to military expenditure regardless of how we measure military spending and determine group countries. In contrast, the causality running from military expenditure to unemployment receives empirical support if military expenditure is measured in terms of its share of GDP and if data are taken from middle‐ and low‐income countries or non‐OECD countries. 相似文献
477.
We look at the different ways of aggregating the exports of dual use products to give the security perception of exporter countries and their consistency with the relevant export control regimes. Also, we analyze different models of export controls highlighting the role of the perception of security, market structure and competition between exporting firms in determining the existence of multiple equilibria and therefore, the need for coordination between countries in setting export controls. 相似文献
478.
479.
480.
IPSec是目前适合所有Internet通信的惟一一种安全技术。通过分析IPSec的处理过程,指出网络安全处理器的使用是IPSec协议高效实现的关键,并详细介绍了目前典型安全处理器的结构和应用。由于目前的网络安全处理器无法满足OC 48及其以上速率接口的处理要求,对下一代高速网络安全处理器的体系结构进行了分析和预测。 相似文献