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71.
李国平 《安全.健康和环境》2021,21(3):29-31,48
针对普光气田地理环境现状,从地质灾害、焊口缺陷、管道腐蚀等方面对集输管网安全隐患进行了分析,结合现有风险防控措施,对下一步工作进行了展望,提出应加强硫化氢泄漏扩散机理研究及环焊缝失效机理研究。 相似文献
72.
预应力螺栓安装的力学性能计算方法 总被引:2,自引:0,他引:2
采用张拉器安装螺栓能使其产生比较一致的预紧力,因而得以广泛使用,推导出张拉量和残余预紧力之间的函数关系式,并给出计算实例,为这种预紧螺栓安装法提供了理论依据。 相似文献
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74.
通过对“威望”轮油污事件的分析,提出当务之急是从有关薄弱环节着手,强化安全责任链意识和机制,创建船舶安全信息保障系统,常抓不懈,跳出事故周期律等的相应对策,以遏止目前海上频发的油轮事故。 相似文献
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76.
本文介绍了烟道式脱硫装置的特点及工艺原理 ,采用该装置处理某冶炼厂高浓度SO2 烟气 ,其脱硫率达 90 %以上 ,净化后的烟气可直接达标排放 ,并年产合格脱硫石膏近万吨。烟道式脱硫装置解决了常规脱硫除尘装置共同存在的结垢和堵塞问题 ,在冶炼烟气治理方面具有一定的推广应用价值。 相似文献
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79.
Using Economic and Regulatory Incentives to Restore Endangered Species: Lessons Learned from Three New Programs 总被引:2,自引:0,他引:2
Abstract: We studied three new incentive-based programs for restoring endangered species on private lands in the United States: safe harbor, Environmental Defense's Landowner Conservation Assistance Program, and conservation banking. For each program, we gathered data on the number of participating landowners, the number of species targeted for assistance, and the cumulative acreage of enrolled land. Measured in this way, both safe harbor and the Landowner Conservation Assistance Program have been remarkably successful. Landowners are drawn to three aspects of these programs: (1) the removal of regulatory burdens associated with attracting endangered species to their property; (2) technical guidance on how to restore habitats for endangered species; and (3) cost-share assistance for habitat restoration. Technical guidance appears to be more important than either regulatory relief or financial assistance in securing the cooperation of some landowners. Assessing the success or failure of conservation banking proved more difficult, given the relatively small number of banks created to date and the lack of any centralized database on them. However, nearly half of the 47 endangered-species conservation banks we surveyed have sold credits, indicating some success in either acquiring or restoring essential habitats. 相似文献
80.
Anthony C. Little Danielle L. Cohen Benedict C. Jones Jay Belsky 《Behavioral ecology and sociobiology》2007,61(6):967-973
In humans (Homo sapiens), sexual dimorphism in face shape has been proposed to be linked to quality in both men and women. Although preferences for
high-quality mates might be expected, previous work has suggested that high quality may be associated with decreased investment
in partnerships. In line with a trade-off between partner quality and investment, human females have been found to prefer
higher levels of masculinity when judging under conditions where the benefits of quality would be maximised and the costs
of low investment would be minimised. In this study, we examined facultative preferences for masculinity/femininity under
hypothetical high and low environmental harshness in terms of resource availability in which participants were asked to imagine
themselves in harsh/safe environments. We demonstrate that environmental harshness influences preferences for sexual dimorphism
differently according to whether the relationship is likely to be short or long term. Women prefer less-masculine male faces
and men prefer less-feminine female faces for long-term than short-term relationships under conditions of environmental harshness.
Such findings are consistent with the idea that high-quality partners may be low investors and suggest that under harsh ecological
conditions, both men and women favour a low-quality/high-investment partner for long-term relationships. For short-term relationships,
where investment is not an important variable, preferences for sexual dimorphism were similar for the low and high environmental
harshness conditions. These results provide experimental evidence that human preferences may be contingent on the environment
an individual finds itself inhabiting. 相似文献