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本文针对小水电系统因分布不均、管控不当而引起的配电质量不高、信息交互不完善问题,应用MQTT协议所带有的高效性、简洁性,基于此协议建立小水电的监控系统。解决其存在的信息“孤岛”问题,“机网”协同问题等。首先详细分析了MQTT协议等通信协议的应用场景与优缺点,具体比较其对小水电场合的适用性。然后对实际应用系统进行结构分析与实现过程分析,采用小水电控制器管控监视信息数据传输,增设智能网关,以RS485总线方式,连接网关与控制器,实现对小水电的远程监控管理。所研究的系统目前已接入运行,并产出高效报文,达到预期效果。 相似文献
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G.W. WALROND 《Natural resources forum》1986,10(4):343-349
The under-reporting of gold production in small developing countries denies these countries an important source of foreign exchange. This paper examines the problem in a Guyanese context, and suggests a series of measures to deal with the problem. 相似文献
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After satisfying their quantitative and qualitative needs as regards nutrition, consumers in developed countries are becoming
more involved in the ethical aspects of food production, especially when it relates to animal products. Social demands for
respecting animal welfare in housing systems are increasing rapidly, as is social awareness of human responsibility towards
farm animals. Many studies have been conducted on animal welfare measurement in different production systems, but the available
information for small ruminants remains insufficient. In this study, a 75 criteria-evaluation tool has been set up on the
basis of the five freedoms concept. Animal welfare considerations have been analyzed in 25 documents, including labeling schemes,
regulations, and recommendations from different European countries. The results show many differences between regular and
organic small ruminant farming standards. Emergency measures are generally lacking. A weak representation of psychological
aspects of animal welfare, especially by the current European legislation, is highlighted. 相似文献
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Small towns are an important part of the rural settlement fabric in the United States, but there is very little substantive research into their capacity to survive or their intrinsic importance. However, recently there has been increasing interest shown by social scientists in these problems. This paper looks at features of this research from the point of view of the population and economic structure of small towns. It concludes by arguing that the problems of small towns are not indigenous to the towns, and calls for a comprehensive national urban policy. 相似文献
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本文简述了××小口径弹及其包装材料 ,在模仿野战环境下贮存 ,进行的防霉试验的概况 ,分析了环境条件对试件的影响 ,提出了防霉的措施。 相似文献
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小流域生态经济的实践与探索 总被引:2,自引:0,他引:2
我国的小流域治理工作已经开展了几十年,在治理水土流失方面取得了一定的成效。如何巩固已取得的成绩,实现小流域的可持续发展引起了广泛关注。本文通过阐述生态经济的概念,指出小流域生态经济系统存在的问题,并结合小流域的特点探讨了在小流域建设生态经济的途径。 相似文献
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旅游小镇建设将有力促进云南省城市化水平的提高,促进云南旅游业提质增效,促进农村发展中一系列深层次矛盾的解决。云南省旅游小镇建设应坚持政府引导、市场导向、突出特色、强化主题、尊重自然、延续文脉、资源整合、塑造品牌、功能完善、设施配套、保护优先、持续发展的原则,妥善解决规划编制、资金筹集、管理体制等关键问题。 相似文献
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