全文获取类型
收费全文 | 6531篇 |
免费 | 61篇 |
国内免费 | 66篇 |
专业分类
安全科学 | 241篇 |
废物处理 | 305篇 |
环保管理 | 1100篇 |
综合类 | 813篇 |
基础理论 | 1927篇 |
环境理论 | 6篇 |
污染及防治 | 1496篇 |
评价与监测 | 435篇 |
社会与环境 | 309篇 |
灾害及防治 | 26篇 |
出版年
2023年 | 30篇 |
2022年 | 52篇 |
2021年 | 47篇 |
2020年 | 34篇 |
2019年 | 40篇 |
2018年 | 191篇 |
2017年 | 199篇 |
2016年 | 284篇 |
2015年 | 129篇 |
2014年 | 114篇 |
2013年 | 389篇 |
2012年 | 571篇 |
2011年 | 419篇 |
2010年 | 170篇 |
2009年 | 182篇 |
2008年 | 245篇 |
2007年 | 289篇 |
2006年 | 247篇 |
2005年 | 526篇 |
2004年 | 643篇 |
2003年 | 525篇 |
2002年 | 157篇 |
2001年 | 118篇 |
2000年 | 74篇 |
1999年 | 95篇 |
1998年 | 51篇 |
1997年 | 63篇 |
1996年 | 56篇 |
1995年 | 59篇 |
1994年 | 57篇 |
1993年 | 50篇 |
1992年 | 44篇 |
1991年 | 36篇 |
1990年 | 41篇 |
1989年 | 27篇 |
1988年 | 20篇 |
1987年 | 27篇 |
1986年 | 26篇 |
1985年 | 32篇 |
1984年 | 23篇 |
1983年 | 34篇 |
1982年 | 33篇 |
1981年 | 32篇 |
1980年 | 24篇 |
1979年 | 20篇 |
1977年 | 12篇 |
1976年 | 9篇 |
1975年 | 12篇 |
1974年 | 14篇 |
1971年 | 13篇 |
排序方式: 共有6658条查询结果,搜索用时 31 毫秒
91.
Phillip Drinkaus Donald S Bloswick Richard Sesek Clay Mann Thomas Bernard 《International journal of occupational safety and ergonomics》2005,11(2):141-152
This paper explores 2 methods of modifying the Strain Index (SI) to assess the ergonomic risk of multi-task jobs. Twenty-eight automotive jobs (15 cases and 13 controls) were studied. The first method is based on the maximum task SI score, and the second method is modeled on the NIOSH Composite Lifting Index (CLI) algorithm, named cumulative assessment of risk to the distal upper extremity (CARD). Significant odds ratios of 11 (CI 1.7-69) and 24 (CI 2.4-240) were obtained using the modified maximum task and CARD, respectively. This indicates that modification of the SI may be useful in determining the risk of distal upper extremity injury associated with a multi-task job. 相似文献
92.
Safety climate in Finnish- and Swedish-speaking companies. 总被引:1,自引:0,他引:1
Simo Salminen Anne Sepp?l? 《International journal of occupational safety and ergonomics》2005,11(4):389-397
The aim of this study was to compare assessments made by Finnish- and Swedish-speaking workers in Finland about the safety climate in their companies, because an earlier study showed that the accident frequency of Swedish-speaking workers was one third lower than that of Finnish-speaking workers. 148 Finnish-speaking and 138 Swedish-speaking workers from 14 small and medium-sized companies participated in this study. They filled out a Finnish safety climate questionnaire, the reliability of which was above the acceptable level. There were no differences between the language groups in the total variables of safety climate and safety action. Based on the differences in single items, we interpreted that Swedish-speaking workers stressed collective safety more, whereas Finnish-speaking workers put more emphasis on their personal responsibility for safety. 相似文献
93.
Alfred Benninghoven Fritz Bindzius Detlef Braun Jutta Cramer Rolf Ellegast Udo Flowerday Andreas Genz Thomas von der Heyden Wolfgang Pfeiffer Dagmar Schittly Ralf Schweer Roger Stamm 《International journal of occupational safety and ergonomics》2005,11(4):409-421
Call centre workplaces are in many ways a challenge to occupational health and safety. The occupation itself can be described as an IT information technology-supported, communication-intensive form of work with often unusual working hours and a high rate of part-time employment. Data on the employee turnover as well as absenteeism related to occupational disability is quite contradictory. Occupational safety and its proponents still have to find new ways into the corporate structures and cultures of this relatively new and rapidly growing branch of industry. In a 2-year research and development project, using a holistic approach and under consideration of all the relevant disciplines, call centre workplaces were studied, and organisational measures were developed and field tested by putting them into practice. Practical help was developed for a sustainable strategy for successful and healthy work in call centres. 相似文献
94.
Public Perception of Flood Hazard in the Niger Delta,Nigeria 总被引:3,自引:0,他引:3
Summary Our study had the aim of understanding how floodplain dwellers regard the risk of flooding. About 500 questionnaires were
administered to landowners in the selected settlements in the study area using systematic random sampling. The results of
analysis show, among other things, that the population regards most important the causes of floods as heavy, prolonged rainfall
and river overflow. Nevertheless, they have little knowledge of the frequency of severe floods, and flood alleviation schemes.
Most flood victims do not get compensation or relief during flood disaster, and the reason why they remain in the study area
is influenced by their occupations, especially fishing, subsistence agriculture, and the presence of crude oil in the region
which has attracted many migrants who cannot afford the high cost of accommodation and are therefore forced to live in vulnerable
areas of the floodplain. Finally, the study concludes that flood control in the region needs the cooperation of government,
community efforts and an enlightenment programmes through environmental education and mass media. 相似文献
95.
Sagoff [Journal of Agricultural and Environmental Ethics 18 (2005), 215–236] argues, against growing empirical evidence, that major environmental impacts of non-native species are
unproven. However, many such impacts, including extinctions of both island and continental species, have both been demonstrated
and judged by the public to be harmful. Although more public attention has been focused on non-native animals than non-native
plants, the latter more often cause ecosystem-wide impacts. Increased regulation of introduction of non-native species is,
therefore, warranted, and, contra Sagoff’s assertions, invasion biologists have recently developed methods that greatly aid prediction of which introduced
species will harm the environment and thus enable more efficient regulation. The fact that introduced species may increase
local biodiversity in certain instances has not been shown to result in desired changes in ecosystem function. In other locales,
they decrease biodiversity, as they do globally. 相似文献
96.
A study of a watershed planning process in the Cache River Watershed in southern Illinois revealed that class divisions, based
on property ownership, underlay key conflicts over land use and decision-making relevant to resource use. A class analysis
of the region indicates that the planning process served to endorse and solidify the locally-dominant theory that landownership
confers the right to govern. This obscured the class differences between large full-time farmers and small-holders whose livelihood
depends on non-farm labor. These two groups generally opposed one another regarding wetland drainage. Their common identity
as “property owner” consolidated the power wielded locally by large farmers. It also provided an instrument – the planning
document – for state and federal government agencies to enhance their power and to bring resources to the region. The planning
process simultaneously ameliorated conflicts between government agencies and the large farmers, while enhancing the agencies’
capacity to reclaim wetlands. In this contradictory manner, the plan promoted the environmental aims of many small-holders,
and simultaneously disempowered them as actors in the region’s political economy.
An erratum to this article is available at . 相似文献
97.
98.
Summary The balance of evidence suggests a perceptible human influence on global ecosystems. Human activities are affecting the global
ecosystem, some directly and some indirectly. If researchers could clarify the extent to which specific human activities affect
global ecosystems, they would be in a much better position to suggest strategies for mitigating against the worst disturbances.
Sophisticated statistical analysis can help in interpreting the influence of specific human activities on global ecosystems
more carefully. This study aims at identifying significant or influential human activities (i.e. factors) on CO2 emissions using statistical analyses. The study was conducted for two cases: (i) developed countries and (ii) developing
countries. In developed countries, this study identified three influential human activities for CO2 emissions: (i) combustion of fossil fuels, (ii) population pressure on natural and terrestrial ecosystems, and (iii) land
use change. In developing countries, the significant human activities causing an upsurge of CO2 emissions are: (i) combustion of fossil fuels, (ii) terrestrial ecosystem strength and (iii) land use change. Among these
factors, combustion of fossil fuels is the most influential human activity for CO2 emissions both in developed and developing countries. Regression analysis based on the factor scores indicated that combustion
of fossil fuels has significant positive influence on CO2 emissions in both developed and developing countries. Terrestrial ecosystem strength has a significant negative influence
on CO2 emissions. Land use change and CO2 emissions are positively related, although regression analysis showed that the influence of land use change on CO2 emissions was still insignificant. It is anticipated, from the findings of this study, that CO2 emissions can be reduced by reducing fossil-fuel consumption and switching to alternative energy sources, preserving exiting
forests, planting trees on abandoned and degraded forest lands, or by planting trees by social/agroforestry on agricultural
lands. 相似文献
99.
Ethological farm programs as they exist in Switzerland are compared with environmental farm programs in respect of demand and supply. Because animal welfare is not a public good but rather a relation that causes psychological externalities, the demand for animal welfare has a different standing in economic theory than the demand for a clean environment. The supply of animal welfare by farmers, however, largely follows the patterns known from the delivery of environmental goods. Farm size, age and education, and also family size and capital intensity are influencing variables. The paper concludes that the design of ethological farm programs should be based on broad public discussions as described by deliberation theorists rather than willingness-to-pay studies. 相似文献
100.