全文获取类型
收费全文 | 869篇 |
免费 | 24篇 |
国内免费 | 23篇 |
专业分类
安全科学 | 88篇 |
废物处理 | 16篇 |
环保管理 | 257篇 |
综合类 | 266篇 |
基础理论 | 131篇 |
环境理论 | 2篇 |
污染及防治 | 30篇 |
评价与监测 | 56篇 |
社会与环境 | 42篇 |
灾害及防治 | 28篇 |
出版年
2023年 | 8篇 |
2022年 | 11篇 |
2021年 | 12篇 |
2020年 | 27篇 |
2019年 | 17篇 |
2018年 | 20篇 |
2017年 | 20篇 |
2016年 | 21篇 |
2015年 | 25篇 |
2014年 | 46篇 |
2013年 | 53篇 |
2012年 | 37篇 |
2011年 | 66篇 |
2010年 | 38篇 |
2009年 | 46篇 |
2008年 | 45篇 |
2007年 | 50篇 |
2006年 | 48篇 |
2005年 | 41篇 |
2004年 | 32篇 |
2003年 | 32篇 |
2002年 | 24篇 |
2001年 | 25篇 |
2000年 | 24篇 |
1999年 | 15篇 |
1998年 | 17篇 |
1997年 | 20篇 |
1996年 | 10篇 |
1995年 | 10篇 |
1994年 | 5篇 |
1993年 | 8篇 |
1992年 | 3篇 |
1991年 | 6篇 |
1990年 | 3篇 |
1989年 | 2篇 |
1988年 | 5篇 |
1987年 | 4篇 |
1986年 | 5篇 |
1985年 | 3篇 |
1984年 | 9篇 |
1983年 | 5篇 |
1982年 | 5篇 |
1981年 | 2篇 |
1980年 | 3篇 |
1979年 | 4篇 |
1978年 | 2篇 |
1977年 | 1篇 |
1974年 | 1篇 |
排序方式: 共有916条查询结果,搜索用时 31 毫秒
891.
Jin Sato 《Sustainability Science》2007,2(2):151-158
The objective of this paper is to trace the evolution of the resource concept in modern Japan by highlighting key individuals
who played major roles in communicating this idea to a wider audience during its formation and development between the 1910s
and 1950s. Special attention will be paid to the effect of different historical contexts on interpretations of the term “resource”.
The paper reveals how the integration of knowledge indispensable for achieving sustainability occurs. The orientation of resource
policy was drastically different before and after World War II. In the pre-war period, the military government used the resource
concept to create a comprehensive inventory of the nation’s military forces, and “resource” was thus a convenient term to
neutralize the aggressive connotations of top-down military mobilization. After the turn to democratic principles in 1945,
“resource” suddenly acquired a symbolic meaning as a means to serve the people. Despite these contrasts, however, pre and
post-war resource concepts share a commonality in that the government acted as the centralizing force, providing a platform
to integrate disparate knowledge under the resource concept. At a time when society itself is more prone to fragmentation,
the resource concept, which played a significant role in unification in the past, should be re-examined. The history of the
concept in Japan, particularly during the pre and post-war period up until the 1950s, contains a wealth of insights as to
how this can be achieved.
相似文献
Jin SatoEmail: |
892.
893.
构建符合研究地点实际生态环境状况的生态安全评价指标体系是科学、合理的进行评价的基础,也是政府进行有效管理的前提。构建了SPR概念模型,提出了基于该模型的城市生态安全指标体系的构建方法。该方法主要包括建立SPR概念模型、实地调研、环境问题及成因辨识、指标体系初建、问卷调查及指标筛选等5个基本步骤。所建的指标体系可反映研究区域的主要生态环境问题,以及这些问题的现状水平、产生诱因和调控力度。以焦作为例,描述了该方法的应用。结果为:经实地调研及问卷调查,率定出9个主要的环境问题及形成每个环境问题的2个主要成因;根据SPR模型,确定表征每个环境问题成因的状态层、压力层及响应层指标,共计74个;就合理性、数据可得性等设计问卷征求专家意见后,最终建立了包含43个指标的生态安全评价指标体系,为未来焦作市生态安全评价和调控奠定基础。 相似文献
894.
895.
概述了我国纺织化学品风险管理在法规、标准指南、风险评估方面与国外的差距。并就纺织印染加工用化学品风险评估中的3个环节,即行业调研、化学品安全数据库构建和危害识别,提出并探讨了8个问题。行业调研环节,重点探讨了纺织化学品生产使用企业的调研问题,纺织化学品的信息透明度问题和混合组分问题;化学品安全数据库构建环节,探讨了纺织化学品安全信息的完整度和定量结构活性关系计算的缺陷;危害识别环节,探讨了纺织化学品中持久性、生物蓄积性和有毒(PBT)化学品,致癌、致畸和生殖毒性化学品(CMR)以及内分泌干扰物质(EDC)的识别。 相似文献
896.
Unlike the role of the membrane in a membrane bioreactor, which is designed to replace a sediment tank, direct sewage membrane filtration (DSMF), with the goal of concentrating organic matters, is proposed as a pretreatment process in a novel sewage treatment concept. The concept of membrane-based pretreatment is proposed to divide raw sewage into a concentrated part retaining most organics and a filtered part with less pollutant remaining, so that energy recovery and water reuse, respectively, could be realized by post-treatment. A pilot-scale experiment was carried out to verify the feasibility of coagulant/adsorbent addition for membrane fouling control, which has been the main issue during this DSMF process. The results showed that continuous coagulant addition successfully slowed down the increase in filtration resistance, with the resistance maintained below 1.0 × 1013 m− 1 in the first 70 hr before a jump occurred. Furthermore, the adsorbent addition contributed to retarding the occurrence of the filtration resistance jump, achieving simultaneous fouling control and chemical oxygen demand (COD) concentration improvement. The final concentrated COD amounted to 7500 mg/L after 6 days of operation. 相似文献
897.
莫伟均何用王建平何贞俊杨聿 《应用与环境生物学报》2022,(6):1622-1628
To explore the current situation and distribution of fish in the eight major estuaries of the Pearl River Estuary in China, acoustic detection and water quality monitoring were conducted in 2018. The results showed that almost living in eight major estuaries were juvenile, the proportion of strong echo was higher in winter, and Jiaomen and Modaomen Estuary were relatively rich in adult fish. In winter, the Humen, Jiaomen, and Yamen Estuary had a high density relatively, for 46.05 (± 50.30), 33.12 (± 93), and 32 (± 78) ind/103 m3, respectively. However, the fish densities of the Hengmen, Modaomen, and Hutiaomen estuaries were higher in summer at 55.72 (± 83.23), 37.52 (± 55) and 36 (± 99) ind/103 m3, respectively. Thus, fish are mainly concentrated in the flood tidal estuary in winter and in the ebb tidal estuary in summer. In addition, fish density was higher in flood tide than in ebb tide, and the strong echo proportion was lower. In winter, the key water quality factors affecting the biodiversity of estuary fish Shannon were chlorophyll a (P < 0.05), while what affected the fish density were turbidity and salinity (P < 0.05). This study showed that the Pearl River estuary was still the main habitat for juvenile fish. However, habitat variability is obvious; hence, it is important to flexibly carry out the delimitation of estuarine fish reserves and ecological restoration. © 2022 Authors. All rights reserved. 相似文献
898.
Rodrigo Goyannes Gusmão Caiado Osvaldo Luiz Gonçalves Quelhas Daniel Luiz Mattos Nascimento Rosley Anholon Walter Leal Filho 《国际发展与全球生态学杂志》2018,25(4):312-326
In recent years, sustainability issues are gaining greater prominence among organizations and their stakeholders around the world. This paper aims to verify the sustainability performance of Brazilian organizations in performance measures and to propose sustainable guidelines with the intention of directing future efforts to the transition to sustainable development. The research utilized a triangulated approach by collecting qualitative and quantitative data acquired through multiple collection methods of a theoretical literature review, documentary analysis of corporate reports, questionnaire survey and semi-structured interviews with industry professionals and academic researchers. The results show that internal organizational factors are the main inductors of the sustainable environment in organizations, and sustainability must be tied to strategic planning, starting from upper management to lower levels. It is essential to use sustainable performance measurement systems in order to respond to external and internal levers and serve as benchmarking for future corporate operations and strategies. In addition, it is the responsibility of organizations to focus their efforts on environmental protection, reduction of energy, corporate reputation, quality management, customer satisfaction and investor relations, as they are considered to be more important and have a relationship of dependence on organizational sustainability. The findings will be of value to professionals and academics who want to start measuring and for continuously improving the sustainability performance of their organizations according to the technical, economic, environmental, social and governance dimensions. This research work also helps to understand the perceptions and expectations of stakeholders. 相似文献
899.
Organizations are increasingly engaging in socially and environmentally sustainable initiatives. This paper focuses on the institutional isomorphism mechanisms to analyse the organizational adoption of sustainable manufacturing practices like eco-design, source reduction, and environmental management practices. This paper empirically examines the role of institutional influence in the organizational adoption of sustainable manufacturing practices among firms in India. The results of this study confirm the significance of the three institutional isomorphism mechanisms in influencing sustainable responses, but not all mechanisms influence the organizational response equally. In particular, the results show a strong influence of self-regulatory normative isomorphism on the implementation. 相似文献
900.