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本文介绍了国外近二十年来专家系统在废水生物处理工艺控制领域的应用及开发的典型系统,分析了废水生物处理工艺难于控制的原因、各类系统的结构和特点及目前废水处理专家系统的不足,探讨了废水生物处理专家系统今后应深入研究的问题及方向 相似文献
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Biogeochemical model (BGC-ES) and its basin-level application for evaluating ecosystem services under forest management practices 总被引:1,自引:0,他引:1
It is important for humans to live in harmony with ecosystems. Evaluation of ecosystem services (ES) may be helpful in achieving this objective. In Japan, forest ecosystems need to be re-evaluated to prevent their degradation due to lack of forest management.In order to evaluate the effects of forest management on forest ES, we developed a process-based biogeochemical model to estimate water, carbon, and nitrogen cycles in forest ecosystems (BGC-ES). This model consists of four submodels: biomass, water cycle, carbon-nitrogen (CN) cycles, and forest management. The biomass submodel can calculate growth of forest biomass under forest managements.Several parameters of the model were calibrated using data from observations of evapotranspiration flux and quality of stream flow in forests. The model results were compared with observations of runoff water from a dam catchment site and with carbon flux observations.Our model was coupled with a basin-level GIS database of forests. Evaluations under various forest management scenarios were carried out for forests in a basin contained in the Ise Bay basin (Chubu region, Japan), where plantations (artificial forests) seemed to have degraded from poor forest management.Comparing our simulation results with those of forests without management in the basin, we found that the amounts of absorbed carbon and runoff were larger in managed forests. In addition, the volume of harvested timber was larger and its quality (diameter) was better in managed forests. Changes of ES within the various scenarios were estimated for their economic value and were compared with the cost of forest management. 相似文献
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危险化学品运输管理及事故应急系统探讨 总被引:1,自引:7,他引:1
通过全球定位系统(GPS)、地理信息系统(GIS)、专家系统(ES)、自动监测等技术的集成,充分发挥各自技术的优势,建立危险化学品运输及事故应急系统。该系统由基于GPS技术的“运输车辆管理”、基于自动监测技术的“事故自动报警”、基于扩散数学模型和GIS技术的“泄漏模拟分析”、基于专家系统的“事故应急救援”以及基于Web技术“信息发布及数据维护”等5个子系统组成,通过集成各子系统实现危险化学品运输管理的自动化、智能化,在事故发生的第一时间自动报警,避免因人为因素而贻误救援时间,同时通过现场信息数据分析做出最有效的救援安排。 相似文献
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采用联用技术测定中国海产品中砷的形态 总被引:7,自引:0,他引:7
1 IntroductionAtthebeginningof2 0 thcentury ,highlevelsofarsenic~mg·kg-1 werefoundinmarineorga nisms,whichattractedalotofattention ,becausearsenicisoneofthemostnotoriouselementsonaccountofitshumantoxicity.Forthisreason ,thedeterminationofthetotalamount… 相似文献
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