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针对农产品质量安全事件的特点,利用粗糙集方法,通过对10个样本案例进行属性分析与约简,确定了危害源毒性、影响范围、死亡人数、伤害人数和人口密度5个农产品质量安全事件等级综合评价指标,通过重要度分析得到各指标的权重分别为0.2、0.2、0.1、0.3和0.2.在此基础上构建了农产品质量安全事件等级评价模型;将模型计算语言化,以WebGIS为工具,设计与实现了农产品质量安全应急管理系统;通过模拟某次农产品质量安全事件表明,该系统能提高对事件的处置能力,也便于直观看到处置过程,为进行农产品质量安全应急管理提供参考. 相似文献
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The main tasks for climate controllers in potato bulk stores are to keep the storage climate in an appropriate condition for quality conservation. To avoid extra energy costs by using cooling systems the internal climate of potato bulk stores is controlled with outdoor air. A conventionally designed controller is difficult to adapt for an optimal climate control to reduce quality loss. However, a controller designed with fuzzy logic is found as advantageous for adapting control parameters to improve the control process. A test stand is built to ventilate and to control two samples of potato bulks simultaneously with the same outdoor weather conditions for comparisons. Several experiments were carried out to compare climate controllers with different control algorithms, i.e. conventional to a different conventional and conventional to fuzzy. 相似文献
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随着环境的不断恶化,大规模灾害的频繁发生,如何防灾、减灾已经成为城市建设中一项不容忽视的艰巨任务。在城市的各类防灾系统中,绿地防灾是一种既能为城市提供自然空间又有助于防灾救援的有效手段。具有防灾与减灾功能的城市绿地在整个城市的防灾与减灾中起着重要的作用,本文以上海大连路公共绿地(应急避难示范园)的建设为例阐诉了绿地防灾与减灾功能的具体应用。 相似文献
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BUFR版台站地面综合观测业务软件应用 总被引:1,自引:0,他引:1
随着气象现代化的推进,新型自动站和业务软件的全面启用减轻了气象测报人员的巨大压力。结合工作实际,介绍了台站现用的BUFR版台站地面综合观测业务软件(ISOS)在软件安装、业务应用、问题处理和应急保障等方面的应用技巧和注意事项。 相似文献