全文获取类型
收费全文 | 174篇 |
免费 | 35篇 |
国内免费 | 36篇 |
专业分类
安全科学 | 54篇 |
废物处理 | 9篇 |
环保管理 | 39篇 |
综合类 | 86篇 |
基础理论 | 9篇 |
污染及防治 | 10篇 |
评价与监测 | 2篇 |
社会与环境 | 18篇 |
灾害及防治 | 18篇 |
出版年
2023年 | 3篇 |
2022年 | 3篇 |
2021年 | 12篇 |
2020年 | 5篇 |
2019年 | 10篇 |
2018年 | 4篇 |
2017年 | 20篇 |
2016年 | 16篇 |
2015年 | 13篇 |
2014年 | 20篇 |
2013年 | 17篇 |
2012年 | 24篇 |
2011年 | 20篇 |
2010年 | 11篇 |
2009年 | 21篇 |
2008年 | 8篇 |
2007年 | 15篇 |
2006年 | 7篇 |
2005年 | 4篇 |
2004年 | 3篇 |
2003年 | 2篇 |
2001年 | 3篇 |
1999年 | 1篇 |
1998年 | 2篇 |
1996年 | 1篇 |
排序方式: 共有245条查询结果,搜索用时 62 毫秒
71.
The United Kingdom uses the Defence Lines of Development (DLOD) framework to analyse and understand the key components and costs of a military capability. Rooted in the Resource Based View (RBV) of a firm, an adapted DLOD approach is employed to explore, analyse and discuss the preparedness, planning and response strategies of two markedly different countries (Australia and Bangladesh) when faced with a major cyclone event of a comparable size. Given the numerous similarities in the challenges facing military forces in a complex emergency and humanitarian agencies in a natural disaster, the paper demonstrates the applicability of the DLOD framework as an analysis and planning tool in the cyclone preparedness planning and response phases, and more broadly within the disaster management area. In addition, the paper highlights the benefit to disaster managers, policymakers and researchers of exploiting comparative cross-learning opportunities from disaster events, drawn from different sectors and countries. 相似文献
72.
Xiaoyun Bing Marlies de Keizer Jacqueline M. Bloemhof-Ruwaard Jack G.A.J. van der Vorst 《Waste management (New York, N.Y.)》2014,34(4):719-729
Plastic waste is a special category of municipal solid waste. Plastic waste collection is featured with various alternatives of collection methods (curbside/drop-off) and separation methods (source-/post-separation). In the Netherlands, the collection routes of plastic waste are the same as those of other waste, although plastic is different than other waste in terms of volume to weight ratio. This paper aims for redesigning the collection routes and compares the collection options of plastic waste using eco-efficiency as performance indicator. Eco-efficiency concerns the trade-off between environmental impacts, social issues and costs. The collection problem is modeled as a vehicle routing problem. A tabu search heuristic is used to improve the routes. Collection alternatives are compared by a scenario study approach. Real distances between locations are calculated with MapPoint. The scenario study is conducted based on real case data of the Dutch municipality Wageningen. Scenarios are designed according to the collection alternatives with different assumptions in collection method, vehicle type, collection frequency and collection points, etc. Results show that the current collection routes can be improved in terms of eco-efficiency performance by using our method. The source-separation drop-off collection scenario has the best performance for plastic collection assuming householders take the waste to the drop-off points in a sustainable manner. The model also shows to be an efficient decision support tool to investigate the impacts of future changes such as alternative vehicle type and different response rates. 相似文献
73.
74.
75.
76.
航海技术专业安全管理素质培养方案研究 总被引:1,自引:0,他引:1
比较分析了海运物流业的风险程度,指出航海技术专业是隐性的安全工程专业。针对海运物流业对高级船员的“安全管理素质”、“驾驶台安全素质”、“应急反应素质”新需求,指出需用高等工程教育模式替代传统的职业教育模式,采用国际上“回归工程”理念来培养安全管理素质。因而提出了由3个课群构成的安全管理课系,阐述“综合安全管理素质”课群的设计思想,重点给出关键课程《海运安全科学基础》的内容组织和教学要求。研究成果为造就具有自组织自适应能力的海运安全管理素质的高级船员奠定了课系基础和培养机制。 相似文献
77.
玉米抗低温助长剂田间试验研究 总被引:13,自引:5,他引:8
为防御东北玉米低温冷害,研制了一种新型的玉米抗低温助长剂,其抗低温效果已为人工温控试验所证实。本项研究采用分期播种、地理播种和田间多处理对比试验方法,检验该化学制剂在影响玉米发育、生物量及产量性状方面的实用效果,并探求其适宜的浓度配比和喷施期次。研究结果表明,该制剂具有促生长、促早熟和使作物高产的性能,可防御延迟型冷害。施用时以1:400倍液和在营养生长期内两次喷施为佳。 相似文献
78.
79.
以稻壳基活性炭(DAC)为载体,利用等体积浸渍法制备了DAC负载Mn、Ce氧化物的Mn-Ce/DAC脱硝催化剂,并用于氨法SCR反应.采用N2吸附、X射线衍射(XRD)、X射线光电子能谱(XPS)和程序升温吸附脱附(TPR/TPD)等手段对催化剂的物理化学性能进行了表征.结果发现与商业木屑基活性炭负载Mn、Ce氧化物催化剂(Mn-Ce/MAC)相比,Mn-Ce/DAC具有更高的Ce3+/Ce4+比率、表面化学吸附氧含量以及表面Brønsted酸性位点,这与其优良的低温SCR活性及抗硫抗水性能直接相关.原位红外光谱结果显示在含硫气氛中Mn-Ce/DAC表面的硫酸盐含量明显低于Mn-Ce/MAC,表明前者具有优良抗硫性能. 相似文献
80.