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排序方式: 共有182条查询结果,搜索用时 78 毫秒
21.
22.
K. v. Sanden J. M. Burgers F. Trendelenburg H. Mark L. Ebert P. Jordan 《Die Naturwissenschaften》1935,23(35):610-614
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Miguel Vences Mariana L. Lyra Jordan G. Kueneman Molly C. Bletz Holly M. Archer Julia Canitz Svenja Handreck Roger-Daniel Randrianiaina Ulrich Struck Sabin Bhuju Michael Jarek Robert Geffers Valerie J. McKenzie Christoph C. Tebbe Célio F. B. Haddad Julian Glos 《Die Naturwissenschaften》2016,103(3-4):25
25.
When the dark ones become darker: How promotion focus moderates the effects of the dark triad on supervisor performance ratings 下载免费PDF全文
The current study adds to a growing body of research on dark personality traits by investigating the moderating role of promotion focus on the relationships among dark triad traits and facets of job performance. Specifically, we investigated the effects of the dark triad (i.e., Machiavellianism, narcissism, and psychopathy) on supervisor ratings of performance, and the moderating effect promotion focus has on those effects. Using field data, we surveyed 549 employees from a manufacturing company in the USA and obtained supervisor ratings of task performance and helping behavior for each employee. We found support for multiple hypotheses, which suggests that managers rated narcissistic and psychopathic employees as having poorer task performance and psychopathic employees as engaging in fewer helping behaviors than employees low in those traits. Furthermore, promotion focus strengthened these negative relationships. We did not find these effects for Machiavellianism. Implications of these findings for future dark personality research as well as the practical implications for managers and organizations are discussed. Copyright © 2015 John Wiley & Sons, Ltd. 相似文献
26.
Challenges and Opportunities for Creating Intelligent Hazard Alerts: The “FloodHippo” Prototype 下载免费PDF全文
J. Michael Johnson Jim M. Coll Paul J. Ruess Jordan T. Hastings 《Journal of the American Water Resources Association》2018,54(4):872-881
Disasters evolving from hazards are a persistent and deadly occurrence in the United States. Despite this, hazard alerts have remained spatially vague, temporally imprecise, and lack actionable information. These deficiencies indicate a divide between the status quo and what is possible given modern environmental models, geographic information systems (GIS), and smartphone capabilities. This work describes an alternative, prototype system, “FloodHippo,” which integrates operational model outputs, cloud‐based GIS, and expanded communication channels to provide personal and interactive disaster alerts for floods. The precepts and methods underpinning FloodHippo apply equally to other disasters that evolve over space and time, presenting the opportunity for a more intelligent disaster response system. The development of such a system would not only minimize current shortcomings in disaster alerts but also improve resilience through individual action, along with community, academic, and federal cooperation. 相似文献
27.
Marc Russell John Rogers Stephen Jordan Darrin Dantin James Harvey Janet Nestlerode Federico Alvarez 《Journal of Coastal Conservation》2011,15(4):647-658
The Tampa Bay Ecosystem Services Demonstration Project (TBESDP) is part of the U.S. Environmental Protection Agency’s Ecosystem
Services Research Program. The principal objectives of TBESDP are to (1) quantify the ecosystem services of the Tampa Bay
watershed, (2) determine the value of ecosystem services to society, (3) predict the supply of ecosystem services under future
scenarios of population growth and climate change, and (4) apply this knowledge through models and tools that will support
the best informed environmental decisions possible. The scope and complexity of this project required intensive effort to
establish which services can be quantified by applying existing models, data, and scientific literature and which services
will require supporting research. Research priorities were assessed by: (1) developing and refining conceptual models of major
ecosystems in the Tampa Bay region, (2) gathering input from stakeholders about the relative importance and values of various
ecosystem services, (3) preparing and reviewing a bibliometric analysis of the volume of scientific literature relevant to
the ecosystems and services of interest, and (4) evaluating an integrated analysis of importance, value, and availability
of scientific information. This analysis led us to focus on two research priorities, seagrass-habitat functions as support
for fishery production, and wetlands as regulators of water quality. 相似文献
28.
Jacob A. Zwart Samantha K. Oliver William David Watkins Jeffrey M. Sadler Alison P. Appling Hayley R. Corson-Dosch Xiaowei Jia Vipin Kumar Jordan S. Read 《Journal of the American Water Resources Association》2023,59(2):317-337
Deep learning (DL) models are increasingly used to make accurate hindcasts of management-relevant variables, but they are less commonly used in forecasting applications. Data assimilation (DA) can be used for forecasts to leverage real-time observations, where the difference between model predictions and observations today is used to adjust the model to make better predictions tomorrow. In this use case, we developed a process-guided DL and DA approach to make 7-day probabilistic forecasts of daily maximum water temperature in the Delaware River Basin in support of water management decisions. Our modeling system produced forecasts of daily maximum water temperature with an average root mean squared error (RMSE) from 1.1 to 1.4°C for 1-day-ahead and 1.4 to 1.9°C for 7-day-ahead forecasts across all sites. The DA algorithm marginally improved forecast performance when compared with forecasts produced using the process-guided DL model alone (0%–14% lower RMSE with the DA algorithm). Across all sites and lead times, 65%–82% of observations were within 90% forecast confidence intervals, which allowed managers to anticipate probability of exceedances of ecologically relevant thresholds and aid in decisions about releasing reservoir water downstream. The flexibility of DL models shows promise for forecasting other important environmental variables and aid in decision-making. 相似文献
29.
Claire W. Varian-Ramos Jordan Karubian Vanessa Talbott Irma Tapia Michael S. Webster 《Behavioral ecology and sociobiology》2010,64(6):967-977
The repayment hypothesis posits that primary sex ratios in cooperative species should be biased towards the helping sex because
these offspring “repay” a portion of their cost through helping behavior and therefore are less expensive to produce. However,
many cooperatively breeding birds and mammals do not show the predicted bias in the primary sex ratio. Recent theoretical
work has suggested that the repayment hypothesis should only hold when females gain a large fitness advantage from the presence
of auxiliary adults in the group. When auxiliaries provide little or no fitness advantage, competition between relatives should
lead to sex ratios biased towards the dispersing (non-helping) sex. We examined the benefits auxiliaries provide to females
and corresponding offspring sex ratios in the red-backed fairy-wren (Malurus melanocephalus), a cooperatively breeding Australian bird with male auxiliary helpers. We found that auxiliaries provide little or no benefit
to female reproductive success or survival. As predicted, the population primary sex ratio was biased towards daughters, the
dispersing sex, and females with auxiliaries produced female-biased broods whereas females without auxiliaries produced unbiased
broods. Moreover, offspring sex ratios were more strongly biased toward females in years when auxiliaries were more common
in the population. These results suggest that offspring sex ratios are associated with competition among the non-dispersing
sex in this species, and also that females may use cues to assess local breeding opportunities for their offspring. 相似文献
30.
J. Grune K. Sempert H. Haberstroh M. Kuznetsov T. Jordan 《Journal of Loss Prevention in the Process Industries》2013,26(2):317-323
This paper presents results of an experimental investigation on the deflagration and deflagration-to-detonation transition (DDT) in an obstructed (blockage ratio BR = 50%), semi-confined flat layer filled with uniform hydrogen–air mixtures. The effect of mixture reactivity depending on flat layer thickness and its width is studied to evaluate the critical conditions for sonic flame propagation and the possibility for detonation onset. The experiments were performed in a transparent, rectangular channel with a length of 2.5 m. The flat layer thickness was varied from 0.06 to 0.24 m and the experiments were performed for different channel widths of 0.3, 0.6 and 0.9 m. The experimental results show flame velocity vs. hydrogen concentration for different thicknesses and widths of the semi-confined flat layer. Three different flame propagation regimes were observed: slow subsonic flame (M << 1), sonic deflagration (M ~ 1) and detonation (M >> 1). It is shown that flame acceleration (FA) to sonic speed is independent of the width of the flat layer. The critical expansion ratio for effective flame acceleration to sonic speed was found to be linearly dependent on the reciprocal layer thickness. 相似文献