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MBR膜污水装置复杂控制策略设计与程序实现 被引量:1
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作者 成继涛 汪水宾 陈幸义 《中国仪器仪表》 2019年第3期61-66,共6页
对污水厂MBR膜池产水装置几个主要复杂自动控制策略进行了研究和程序实现。采用污水处理项目普遍应用的西门子S7-400H容错系统进行了硬件配置及网络搭建,根据MBR自动产水、CIP药洗顺控、自动清水反洗轮询等程序的功能及特点,选择梯形图(... 对污水厂MBR膜池产水装置几个主要复杂自动控制策略进行了研究和程序实现。采用污水处理项目普遍应用的西门子S7-400H容错系统进行了硬件配置及网络搭建,根据MBR自动产水、CIP药洗顺控、自动清水反洗轮询等程序的功能及特点,选择梯形图(LAD)、功能块(FBD)、语句表(STL)等不同种类的语言编写程序。该系统现场实际运行已超过6个月,结果表明自动效果能够满足市政污水单位监控运行要求。 展开更多
关键词 MBR膜池 自动产水 CIP反洗 S7-400H 容错系统
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Discussion on Action and Potential of Fenlong Megascience in the Symbiosis between Human and Nature 被引量:4
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作者 韦本辉 申章佑 +6 位作者 周佳 周灵芝 李艳英 劳承英 甘秀芹 胡泊 韦元波 《Agricultural Science & Technology》 CAS 2017年第12期2303-2308,2311,共7页
The fourth new farming model Fenlong is identified as megascience for the first time. Fenlong can be directly applied to farming of farmland, remoulding of mortar black soil and saline alkali land and development of d... The fourth new farming model Fenlong is identified as megascience for the first time. Fenlong can be directly applied to farming of farmland, remoulding of mortar black soil and saline alkali land and development of degraded grassland. Deep loosening can create huge soil reservoirs, reduce fertilization, promote indi- rectly the improvement of river water fisheries and water sources and the upgrading of shaping and hydropower industry, thus making a new round of mobilization and pooling of natural resources. As a result, the nature is able to produce good food needed by human, the spatial dimension of the land is increased, the natural pre- cipitation storage is increased, the flood and drought disasters are reduced, the eco-environment is improved, and the economic benefits are increased. Fenlong is not restricted to global application by ecological region and crop variety and is not subject to the time-space constraints for a hundred thousand years. On the basis of utilizing the heaven and earth resources, it brings about a huge effect of mega- science. Compare with traditional farming, the depth under the mode of Fenlong is increased by 2-3 times, the contents of nutrient, water, oxygen and microorganism in the soil are increased by 10%-200%, the content of pale salt is increased by 20%-40%, the temperature is increased by 2-4 ~C, and the photosynthetic efficiency of crops is improved by 10%. Under the cultivation mode of Fenlong, the yield of crop applied with no fertilizers is increased by more than 10%, crop yield is still in- creased by more than 5% when the application amount of chemical fertilizer is re- duced by 10%-20%. Under the farming mode of Fenlong combined with no in- crease in fertilization, the crop yield, crop quality, farming efficiency, natural precipi- tation storage and air humidity are increased by 10%-50%, 5%, 15%, 100% and 5%, respectively, and the emissions of methane and other gases are reduced by more than 5%. Even in mortar black soil, saline alkali land and degraded grassland, the yield is still increased by 15%-50%. These improvement effects can last for many years, helping achieve the real harmonious coexistence between human and nature. 展开更多
关键词 Fenlong Megascience Autogeneration Yield and quality improvement Water conservation ecology Harmonious coexistence between human and nature
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Locality Improvement Technology for Auto-control System of Aquatic Seedling 被引量:1
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作者 高桂生 郑立新 《Agricultural Science & Technology》 CAS 2012年第11期2449-2452,共4页
[Objective] The aim was to improve part of auto-control system of aquatic seedling breeding and to lay foundation for highly-efficient and stable use of the sys- tem. [Method] The executive and drive modules of the au... [Objective] The aim was to improve part of auto-control system of aquatic seedling breeding and to lay foundation for highly-efficient and stable use of the sys- tem. [Method] The executive and drive modules of the auto-control system were im- proved, after which real-time monitor, data display and alarm modules were tested on time. [Result] In the test, for the improved system, stability and sensitivity were enhanced; different components matched better; transmitting electric resistanc6 was reduced. [Conclusion] The research provides references for auto-control of water temperature and dissolved oxygen, and faults clearing in aquatic seedling breeding. 展开更多
关键词 Aquatic seedling cultivation Execution and driving MODULE Monitoringand warning
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