全文获取类型
收费全文 | 228篇 |
免费 | 2篇 |
国内免费 | 2篇 |
专业分类
安全科学 | 2篇 |
废物处理 | 4篇 |
环保管理 | 20篇 |
综合类 | 129篇 |
基础理论 | 42篇 |
污染及防治 | 21篇 |
评价与监测 | 6篇 |
社会与环境 | 7篇 |
灾害及防治 | 1篇 |
出版年
2017年 | 4篇 |
2016年 | 3篇 |
2015年 | 3篇 |
2014年 | 7篇 |
2013年 | 7篇 |
2012年 | 8篇 |
2011年 | 6篇 |
2010年 | 11篇 |
2009年 | 5篇 |
2008年 | 6篇 |
2007年 | 6篇 |
2006年 | 4篇 |
2005年 | 3篇 |
2003年 | 4篇 |
2002年 | 5篇 |
2001年 | 4篇 |
2000年 | 4篇 |
1997年 | 4篇 |
1995年 | 4篇 |
1994年 | 2篇 |
1993年 | 2篇 |
1992年 | 2篇 |
1985年 | 2篇 |
1980年 | 2篇 |
1976年 | 2篇 |
1967年 | 2篇 |
1966年 | 2篇 |
1963年 | 3篇 |
1962年 | 4篇 |
1961年 | 2篇 |
1960年 | 6篇 |
1959年 | 4篇 |
1958年 | 2篇 |
1957年 | 4篇 |
1956年 | 5篇 |
1955年 | 4篇 |
1954年 | 3篇 |
1953年 | 2篇 |
1952年 | 3篇 |
1950年 | 2篇 |
1943年 | 3篇 |
1942年 | 2篇 |
1933年 | 4篇 |
1932年 | 4篇 |
1930年 | 4篇 |
1929年 | 5篇 |
1926年 | 3篇 |
1924年 | 3篇 |
1914年 | 2篇 |
1913年 | 4篇 |
排序方式: 共有232条查询结果,搜索用时 432 毫秒
1.
2.
Franz Huber 《Die Naturwissenschaften》1992,79(9):393-406
Crickets, tettigoniids (bush crickets or long-horned grasshoppers) and acridids (short-horned grasshoppers) are well-suited animals to study acoustically mediated behavior and to search for the underlying sensory, nervous, and effector mechanisms. Several behavioral tactics are described which improve reproductive success, serve to avoid predators such as bats, or have been developed for defence against parasitic insects. Phonotactic orientation of female crickets toward the calling male was chosen, since for this behavior the underlying sensory and nervous mechanisms have been intensively studied. Song recognition was found to be based on one critical parameter of the song, thesyllable period, and the females show abandpass behavior for which a correlate exists inlocal brain neurons. Sound orientation is based on apressure gradient mechanism in each ear, and it needs abinaural intensity comparison within the central nervous system. With intracellular recordings from auditory interneurons during phonotactic orientation and their manipulation, a cellular correlate could be found which obeys the rule “turn to the side most strongly stimulated”. 相似文献
3.
4.
5.
6.
A Generic Bio-Economic Farm Model for Environmental and Economic Assessment of Agricultural Systems 总被引:2,自引:0,他引:2
Janssen S Louhichi K Kanellopoulos A Zander P Flichman G Hengsdijk H Meuter E Andersen E Belhouchette H Blanco M Borkowski N Heckelei T Hecker M Li H Oude Lansink A Stokstad G Thorne P van Keulen H van Ittersum MK 《Environmental management》2010,46(6):862-877
Bio-economic farm models are tools to evaluate ex-post or to assess ex-ante the impact of policy and technology change on agriculture, economics and environment. Recently, various BEFMs have been developed, often for one purpose or location, but hardly any of these models are re-used later for other purposes or locations. The Farm System Simulator (FSSIM) provides a generic framework enabling the application of BEFMs under various situations and for different purposes (generating supply response functions and detailed regional or farm type assessments). FSSIM is set up as a component-based framework with components representing farmer objectives, risk, calibration, policies, current activities, alternative activities and different types of activities (e.g., annual and perennial cropping and livestock). The generic nature of FSSIM is evaluated using five criteria by examining its applications. FSSIM has been applied for different climate zones and soil types (criterion 1) and to a range of different farm types (criterion 2) with different specializations, intensities and sizes. In most applications FSSIM has been used to assess the effects of policy changes and in two applications to assess the impact of technological innovations (criterion 3). In the various applications, different data sources, level of detail (e.g., criterion 4) and model configurations have been used. FSSIM has been linked to an economic and several biophysical models (criterion 5). The model is available for applications to other conditions and research issues, and it is open to be further tested and to be extended with new components, indicators or linkages to other models. 相似文献
7.
Mlynek Franz Himmelsbach Markus Buchberger Wolfgang Klampfl Christian W. 《Environmental science and pollution research international》2021,28(42):59382-59390
Environmental Science and Pollution Research - The aim of this study was to investigate the uptake of four beta-blockers by the model plant Lepidium sativum (garden cress) and their possible... 相似文献
8.
By means of environmental education, teachers are supposed to intervene in pupils’ awareness and concern of environmental
issues. Teachers’ environmental attitudes, however, have rarely been studied. We analysed 367 German pre- and in-service teachers’
environmental attitudes for their structure and socio-economic correlates within the frame of a European project. Thus, we
retrieved for adults the two-dimensional model of ecological values (2-MEV) presented for adolescents by Bogner and Wiseman
(Sci Educ Int 15(1):27–48, 2004). For the two domains, Preservation and Utilisation, the psychometric structure was confirmed and discriminative correlations
with age, gender and teaching subject were unveiled. Further research is needed to deduce the implications for teaching practice. 相似文献
9.
Davide Chiaroni Vittorio Chiesa Simone Franzò Federico Frattini 《International Journal of Green Energy》2017,14(11):889-898
This article investigates the impact that the electricity tariff reform is likely to have on investments in renewable energies (i.e., photovoltaics) and the adoption of energy efficiency measures (i.e., installation of heat pumps and efficient home appliances) in the residential market in Italy. The study develops detailed cost comparisons and simulations considering two different investment scenarios (before and after the reform) to conclude that the reform will: (i) have a negative impact on investments in photovoltaic systems; (ii) favor the adoption of energy efficiency measures, such as efficient home appliances. 相似文献
10.
Mechanistic effect models for ecological risk assessment of chemicals (MEMoRisk)—a new SETAC-Europe Advisory Group 总被引:1,自引:1,他引:0