全文获取类型
收费全文 | 522篇 |
免费 | 45篇 |
国内免费 | 48篇 |
出版年
2024年 | 1篇 |
2023年 | 6篇 |
2022年 | 6篇 |
2021年 | 13篇 |
2020年 | 19篇 |
2019年 | 21篇 |
2018年 | 17篇 |
2017年 | 18篇 |
2016年 | 20篇 |
2015年 | 21篇 |
2014年 | 20篇 |
2013年 | 65篇 |
2012年 | 25篇 |
2011年 | 28篇 |
2010年 | 23篇 |
2009年 | 25篇 |
2008年 | 41篇 |
2007年 | 33篇 |
2006年 | 37篇 |
2005年 | 23篇 |
2004年 | 14篇 |
2003年 | 17篇 |
2002年 | 12篇 |
2001年 | 9篇 |
2000年 | 12篇 |
1999年 | 12篇 |
1998年 | 10篇 |
1997年 | 8篇 |
1996年 | 7篇 |
1995年 | 6篇 |
1994年 | 3篇 |
1993年 | 3篇 |
1992年 | 3篇 |
1991年 | 6篇 |
1990年 | 3篇 |
1989年 | 8篇 |
1988年 | 1篇 |
1987年 | 5篇 |
1986年 | 4篇 |
1985年 | 1篇 |
1984年 | 1篇 |
1983年 | 2篇 |
1982年 | 2篇 |
1981年 | 1篇 |
1979年 | 1篇 |
1977年 | 1篇 |
1976年 | 1篇 |
排序方式: 共有615条查询结果,搜索用时 281 毫秒
21.
Tara Davenport 《Ocean Development & International Law》2013,44(3):201-242
Submarine communications cables laid on the seabed of the ocean are the foundation of the world's international telecommunications network. International law, in particular, the law of the sea, has recognized the freedom to lay submarine cables and perform associated operations and has placed certain obligations on states related to the protection of submarine cables. This article examines the international law with respect to submarine cables and discusses the various problems with both the law and state practice on submarine cables. It argues that these problems are illustrations of the traditional challenges that face the law of the sea; that is, the balancing and accommodation of competing uses of ocean space. It concludes that an important step toward resolving these problems is enhanced consultation and cooperation between cable companies and governments and that efforts should focus on creating such mechanisms. 相似文献
22.
Zou Keyuan 《Ocean Development & International Law》2013,44(1):69-93
The United States is the sole superpower in the contemporary world and its role in the development of the law of the sea cannot be ignored. Although having not yet acceded to the U.N. Convention on the Law of the Sea, the United States has contributed to the development of the international law of the sea in numerous ways, including responding to the so-called excessive maritime claims in East Asia and creating new rules of maritime enforcement. This article assesses this recent U.S. practice. 相似文献
23.
Michael Sean Sullivan 《Ocean Development & International Law》2013,44(3):203-268
In March 1995, Canadian fisheries authorities boarded and arrested the Spanish fishing vessel, Estai, outside the Canadian 200‐mile zone on the Grand Banks, an event that served to focus world attention on a dispute that had its origins in the failure of the 1982 United Nations Convention on the Law of the Sea to implement an effective conservation and management regime for fish stocks on the high seas, particularly with respect to fish stocks that straddle coastal states’ exclusive economic zones. This article examines the origins of the dispute, including the allegations relating to overfishing of North Atlantic Fisheries Organization‐recommended quotas, the background to the vessel's arrest, and the subsequent confrontation that occurred, both at diplomatic levels and on the high seas, between Canada and the European Union. An analysis is made of the case in international law for Canada's extension of jurisdiction beyond 200 miles pursuant to the provisions of Section 5 of the Coastal Fisheries Protection Act. Finally, the article examines the implications of the recently concluded Agreement on the Conservation and Management of Straddling Fish Stocks and Highly Migratory Fish Stocks for disputes of the kind that arose in the present case. 相似文献
24.
In the interests of increasing fish production globally, alleviating global poverty, and income generation, marine aquaculture has seen worldwide expansion over the past few decades. However, this expansion has been matched by growing concerns over its environmental impacts. This article utilizes comparative legal analysis to explore the legal systems of governance for the environmental performance of marine aquaculture in four case study countries. Two are members of the European Community (Scotland, as part of the United Kingdom, and Greece), one is a recent accession country (Slovenia), and the fourth is closely linked to the European Community albeit geographically and legally disparate (Israel). 相似文献
25.
Although fossil fuels are the overwhelming source of energy for the world, and will continue to be so for the foreseeable future, demographic, environmental, political, and economic factors indicate that interest in alternative, renewable sources of energy will grow. There is a need for both global and national policies on ocean energy management. In particular, coastal states and the energy industry would benefit from guidelines that helped to create a predictable, stable environment in which long‐term, high‐cost research, development, and investment decisions could be made with confidence. Coastal states have jurisdiction over the maritime zones most relevant to energy production, but many lack the expertise and funds to develop this potential source. Industry must operate within the control of coastal states and will not be served well by a plethora of differing legal interpretations and unilaterally imposed restrictions and obligations from state to state. An Ocean Energy Protocol to the 1982 UN Convention on the Law of the Sea would afford governments and industry the opportunity to clarify their respective obligations and address particular interests for mutual benefit. 相似文献
26.
This article discusses the allocation problem in international fisheries management, which is critical to effective resource management. A number of cases where allocation problems exist are reviewed and trends identified. It is concluded that power relationships between the states involved are an important determinant of allocation outcomes. While this may seem a frustrating conclusion, it nevertheless reflects the realities of international cooperation. 相似文献
27.
Yan Zhu Jiangning Song Zixiang Xu Jibin Sun Yanping Zhang Yin Li Yanhe Ma 《Biotechnology and bioengineering》2013,110(3):914-923
Flux balance analysis (FBA) has been widely used in calculating steady‐state flux distributions that provide important information for metabolic engineering. Several thermodynamics‐based methods, for example, quantitative assignment of reaction directionality and energy balance analysis have been developed to improve the prediction accuracy of FBA. However, these methods can only generate a thermodynamically feasible range, rather than the most thermodynamically favorable solution. We therefore developed a novel optimization method termed as thermodynamic optimum searching (TOS) to calculate the thermodynamically optimal solution, based on the second law of thermodynamics, the minimum magnitude of the Gibbs free energy change and the maximum entropy production principle (MEPP). Then, TOS was applied to five physiological conditions of Escherichia coli to evaluate its effectiveness. The resulting prediction accuracy was found significantly improved (10.7–48.5%) by comparing with the 13C‐fluxome data, indicating that TOS can be considered an advanced calculation and prediction tool in metabolic engineering. Biotechnol. Bioeng. 2013; 110: 914–923. © 2012 Wiley Periodicals, Inc. 相似文献
28.
禁牧条件下不同类型草地群落结构特征 总被引:2,自引:0,他引:2
利用幂乘方法则模型探讨了鄂尔多斯3种不同类型草地在禁牧情况下的群落结构特征,包括物种组成、物种多样性、生物量和空间分布规律。结果表明:幂乘方法则在解析鄂尔多斯不同类型草地的空间异质性时具有很好的吻合性;羊草(Leymuschinensis)草地、芨芨草(Achnatherum splendens)草地和油蒿(Artemisia ordosica)灌丛草地均比随机分布呈现了较强的空间异质性,群落整体的空间异质性指数表现为油蒿灌丛草地>羊草草地>芨芨草草地;群落整体的物种多样性指数为油蒿灌丛草地>羊草草地>芨芨草草地;L-样方(50cm×50cm)内的平均物种数和物种多样性指数均表现为羊草草地极显著地高于油蒿灌丛草地,油蒿灌丛草地又极显著地高于芨芨草草地(P<0.001);L-样方内的平均生物量表现为油蒿灌丛草地极显著地高于芨芨草草地(P<0.001),而羊草草地与油蒿灌丛草地以及芨芨草草地之间没有显著性差异;这3种类型的草地其L-样方内的平均生物量和物种多样性指数都随着群落整体空间异质性指数的增大而增大。 相似文献
29.
John P. DeLong Valery E. Forbes Nika Galic Jean P. Gibert Robert G. Laport Joseph S. Phillips Janna M. Vavra 《Ecology and evolution》2016,6(2):573-581
It is increasingly recognized that evolution may occur in ecological time. It is not clear, however, how fast evolution – or phenotypic change more generally – may be in comparison with the associated ecology, or whether systems with fast ecological dynamics generally have relatively fast rates of phenotypic change. We developed a new dataset on standardized rates of change in population size and phenotypic traits for a wide range of species and taxonomic groups. We show that rates of change in phenotypes are generally no more than 2/3, and on average about 1/4, the concurrent rates of change in population size. There was no relationship between rates of population change and rates of phenotypic change across systems. We also found that the variance of both phenotypic and ecological rates increased with the mean across studies following a power law with an exponent of two, while temporal variation in phenotypic rates was lower than in ecological rates. Our results are consistent with the view that ecology and evolution may occur at similar time scales, but clarify that only rarely do populations change as fast in traits as they do in abundance. 相似文献
30.
As Myanmar undergoes political and societal transition, observers are asking questions about citizenship and ethnic identity. How does one think about citizenship and people's negotiations with law in political-legal regimes that do not subscribe to liberal democratic norms? This paper investigates how law marginalizes the Burmese Chinese minority in Myanmar and the nature of their legal participation. Since law asserts cultural power impacting the way people think and behave, we engage with the concept of legal consciousness to understand how perceptions of legal vulnerability shape political subjectivity ambivalently. The paper highlights the spatial strategies and everyday practices that the Burmese Chinese deploy to navigate oppressive laws, but signals that internal social divisions and geopolitical considerations deter collective action towards rights assertion. It argues that studying the multiple sites and scales through which law is engaged contributes towards recovering citizenship aspirations where engagement with power and authority are articulated differently from Western norms. 相似文献