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11.
This paper analyses redounded profits of cooperation and non-cooperation among cities in urban agglomerations based on game theory. It discusses the problems of economical development among cities with feeble cooperation, and deduces the conclusion that only cooperation of cities produces the maximum profits and realizes Pareto efficiency for cities and urban agglomerations. The paper states that cooperation is the cornerstone of economic sustainable development in urban agglomerations in profits produced by cooperation among cities. Some suggestions to accelerate cooperation among cities are proposed. 相似文献
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13.
Strategic investment in reputation 总被引:1,自引:0,他引:1
Dirk?SemmannEmail author Hans-Jürgen?Krambeck Manfred?Milinski 《Behavioral ecology and sociobiology》2004,56(3):248-252
Although collective efforts are common in both animal and human societies, many human and probably animal social dilemmas have no obvious cooperative solution, which is a challenge for evolutionary biologists. In public goods games, i.e. the experimental paradigm for studying the sustainability of a public resource with human subjects, initial cooperation usually declines quickly. Recently, it has been shown that the interaction with another social game in which good reputation attracts help, can maintain a high level of cooperation in the public goods game. Here we show experimentally that humans use different strategies in the public goods game conditional on whether the player knows that his decisions will be either known or unknown in another social game. The knowledge of being recognized as the same individual in both scenarios motivates players to invest in their reputation and thus sustain the public resource. However, cooperation declines immediately when individual identities switch from being recognizable to being unrecognizable between the two interacting games.Communicated by M. Borgerhoff-Mulder 相似文献
14.
On the sustainability of common property resources 总被引:2,自引:0,他引:2
Nuria Oss-Eraso Montserrat Viladrich-Grau 《Journal of Environmental Economics and Management》2007,53(3):393-410
We provide a model where a common property resource is managed by two types of agents, cooperators and non-cooperators, who adjust their extraction strategies in response to persistent differential payoffs. In our model, the social approval of cooperators works as a reward mechanism which, as we show, favors both the pervasiveness of cooperative behavior and the sustainable management of natural resources. Specifically, we show that in the presence of such a reward mechanism a stable equilibrium can be reached with both strategies being practiced simultaneously and a decentralized and sustainable management of common property resources is possible. 相似文献
15.
Lynn E. Fletcher 《Behavioral ecology and sociobiology》2007,61(12):1809-1821
Group living confers both benefits and costs to the individuals involved. Benefits may include enhanced defense, thermoregulation,
and increased foraging efficiency while costs often involve competition for resources such as food, shelter, and mates. Communication
provides a medium of exchange among individuals engaged in either cooperative or competitive interactions. The functional
analysis of signals within groups therefore requires testing both cooperative and competitive functions, although the latter
is infrequently done. In this paper, I study the use of two vibrational signals in a gregarious, processionary Australian
sawfly larva, Perga affinis: tapping and contractions. Tapping involves striking the substrate with the sclerotized portion of the abdominal tail and
a contraction is a fast, whole-body twitch, which is both tactile and vibrational in its transmission. For tapping, I first
demonstrate that it is a form of communication, as tapping of one larva elicits tapping in another, and that it is transmitted
through substrate vibrations. I then test whether the signal is mostly cooperative or competitive in nature by examining it
in light of two hypotheses: (1) the Group Coordination hypothesis, stating that the signal functions to maintain group cohesiveness
and (2) the Competitive Signaling hypothesis, stating that tapping serves as a competitive assessment signal between larvae
while feeding. For contractions, I test only the group coordination hypothesis that they serve to coordinate and initiate
group movement. Results support the group coordination hypothesis for each signal. While feeding, lone larvae (without potential
competitors) were significantly more likely to tap than those in groups, and this trend continued in non-feeding situations.
Contractions regularly preceded periods of group movement during processions and were given with increasing frequency before
departure from preforaging clusters. The vibrational signals in this processionary species likely function cooperatively to
maintain group cohesiveness and coordinate movement. 相似文献
16.
Claire Beausoleil Jean-Nicolas Ormsby Andreas Gies Ulla Hass Jerrold J. Heindel Marie Louise Holmer Pia Juul Nielsen Sharon Munn Gilbert Schoenfelder 《Chemosphere》2013
A workshop was held in Berlin September 12–14th 2012 to assess the state of the science of the data supporting low dose effects and non-monotonic dose responses (“low dose hypothesis”) for chemicals with endocrine activity (endocrine disrupting chemicals or EDCs). This workshop consisted of lectures to present the current state of the science of EDC action and also the risk assessment process. These lectures were followed by breakout sessions to integrate scientists from various backgrounds to discuss in an open and unbiased manner the data supporting the “low dose hypothesis”. While no consensus was reached the robust discussions were helpful to inform both basic scientists and risk assessors on all the issues. There were a number of important ideas developed to help continue the discussion and improve communication over the next few years. 相似文献
17.
Cooperation among non-kin has been attributed sometimes to reciprocal altruism: Two or more individuals exchange behaviour
that benefits the respective partner. According to direct reciprocity, cooperation is based on past behaviour of a known partner.
In contrast, in generalised reciprocity, cooperation is based on anonymous social experience where the identity of the partner
is irrelevant. In a previous study, female Norway rats (Rattus norvegicus) were found to cooperate according to a generalised reciprocity mechanism. In this study, we tested whether Norway rats would
also cooperate as predicted by a direct reciprocity mechanism and whether direct reciprocity would cause a higher propensity
to cooperate than generalised reciprocity. Focal animals were experimentally manipulated to receive social experience from
known or unknown, helpful or defecting partners in an instrumental cooperative task. Our first experiment shows that rats
are more helpful towards a partner from which they had received help before than towards a partner that had not helped (i.e.
direct reciprocity). Our second experiment revealed that after receiving help by others, rats were more helpful towards a
partner from which they had received help before than towards a new partner (i.e. direct reciprocity generated a higher cooperation
propensity than generalised reciprocity). We conclude that in female Norway rats, the tendency to cooperate is influenced
by partner-specific information. To our knowledge, this is the first study to demonstrate direct reciprocity in rodents, and
it is the first study testing direct vs generalised reciprocity in animals. 相似文献
18.
Pedestrian behavior and exit selection in evacuation of a corridor - An experimental study 总被引:1,自引:0,他引:1
Simo Heliövaara Juha-Matti KuusinenTuomo Rinne Timo KorhonenHarri Ehtamo 《Safety Science》2012,50(2):221-227
In this paper, we present an experiment whose purpose was to study evacuees’ exit selection under different behavioral objectives. The experiment was conducted in a corridor with two exits located asymmetrically. This geometry was used to make most participants face a nontrivial decision on which exit to use. We analyze the behavior on a macroscopic level using statistical methods. Our results suggest that the members of an evacuating crowd may not be able to make optimal decisions when assessing the fastest exit to evacuate. In addition, the egress time of the whole crowd turns out to be shorter when the evacuees behave egoistically instead of behaving cooperatively. This is an interesting result because many studies on real emergencies show that evacuees tend to cooperate and act altruistically. 相似文献
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20.
环境监测与环境监察的职能分析 总被引:1,自引:0,他引:1
环境监察和环境监测是环境保护工作的重要组成部分,有配合、有分工。环境监察依法对辖区贯彻执行环境保护法律法规、对规章制度和标准执行情况进行监督,检查和处理,对各种应急情况严格执法。环境监测则是用科学的方法监视和监测代表环境质量和变化趋势的各种监测数据的全过程。共同做好环境保护工作,是二者有机结合的体现。 相似文献