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461.
Ellycia Harrould-Kolieb 《Conservation biology》2021,35(2):548-558
Ocean acidification is a substantial emergent threat to marine biodiversity and the goods and services it provides. Although efforts to address ocean acidification have been taken under the Convention on Biological Diversity (CBD), a far greater potential to do so exists by finding synergies between biodiversity conservation efforts and ocean acidification action. The ongoing process to develop a post-2020 global biodiversity framework offers an opportunity to ensure that opportunities for addressing ocean acidification are capitalized on and not overlooked. I argue that to achieve this, the following are needed: a technical integration of ocean acidification across the targets to be included in the post-2020 framework and a reframing of the issue as a biodiversity problem so as to highlight the synergies between existing biodiversity work and action needed to address ocean acidification. Given that the post-2020 framework is intended to establish the global biodiversity agenda for the coming decades, integration of ocean acidification will set a precedent for the other biodiversity-related conventions and encourage greater uptake of the issue across the wider international community. My approach is of direct relevance to those participating in the negotiations, both from a CBD Party perspective and the perspective of those advocating for a strong outcome to protect marine biodiversity and marine socioecological systems. My discussion of framing is relevant to those working beyond the CBD within other biodiversity-related conventions in which goals to address ocean acidification are sorely lacking. 相似文献
462.
In the case of determining routes and locations for constructing distribution centers on hazardous materials (Hazmat) transportation, risk and cost are considered as the main attributes for developing mathematical models. Since, Hazmat transport risk may be defined as a chaotic factor, using dynamic risk changes the selected routes and optimized locations for constructing distribution centers.In the present paper, an iterative procedure has been proposed to determine the best routes and optimized locations of distribution centers for transporting hazardous materials based on the concept of chaos theory in which hazmat transport risk is defined as a dynamic variable. A mathematical model has been developed for solving Hazmat routing and locating problems, simultaneously. Daily transport risk, defined as a chaotic variable, is iteratively updated using one-dimensional logistic map equation over the time period (year). An experimental road network, consists of eighty nine nodes and one hundred and three two-way edges, has been selected for analytical process and model validation. Results revealed that although different amounts of risk and cost priorities change optimized locations of distribution centers and their associated supplies, but the most frequent set of optimized centers remains independent. Therefore, the proposed procedure is capable to determine the best routes and optimized locations for distributing hazardous materials. While risk is iteratively updated over a specific time period, results show that the main property of chaos theory known as dependency upon initial condition would not be a serious concern for decision makers who are dealing with Hazmat management. 相似文献
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随着经济发展,城镇建设和工业生产不断扩大,城市工业及生活中用水量急剧增长的同时,污水的排放量也随之增加。城市水环境在城市发展中具有生活与生产、防洪排涝、生态和景观以及文化娱乐等功能,但水体污染造成的水质恶化,会使城市水环境失去生态功能,制约着城市居民的生存和健康发展,水污染环境已对人类社会的可持续发展带来严重威胁。因此,水环境质量评价也成为环境质量评价中的一项重要内容。文章从瓦房店市地表水、地下水两方面进行分析,得出城市水环境质量存在的问题,并提出水环境污染防治对策。 相似文献
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Krisada Asawarungsaengkul Suebsak Nanthavanij 《International journal of occupational safety and ergonomics》2013,19(3):355-369
This paper presents an analytic procedure to assist safety practitioners in evaluating the audibility of an existing auditory warning system in their workplaces. Two alarm location models are described: (a) a model with an unknown signal sound level, and (b) a model with a known signal sound level. A heuristic algorithm to determine a minimum number of alarm devices and their locations so that the warning signals can be clearly heard by workers is also proposed. The algorithm considers the ambient noise level, noise levels generated by individual machines, locations where workers are likely to be present, and noise levels at worker locations. From the numerical examples and the computation experiment, both the optimization and heuristic approaches yield solutions that satisfy the 15-dBA constraints. The heuristic approach is efficient in solving large alarm location problems due its capability to find near-optimal solutions within reasonable computation time. 相似文献
470.
探索高等职业院校管理上的新途径 总被引:1,自引:0,他引:1
区颖 《中国环境管理干部学院学报》2004,14(2):100-102,106
根据高职院校和普通高等院校之间存在着很多差异,指出管理者应认真分析高职院校的特点,有针对地进行管理。目前高职院校在行政与教学管理方面还存在着一些问题。只有解决了这些问题,高职院校才能真正发挥其培养实用型人才的作用。 相似文献