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介绍了在无CCU控制单元前提下,如何满足EFP现场制作系统基本技术要求。在对HL-43摄像机个别电路进行少许改动后,由ENG方式组成EFP方式,扩展了节目制作手段,满足了小型节目及转播车无法到达特殊工作场所的要求。 相似文献
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加装国产变频器作为发射机阻隔风机的备用控制器,对风机控制器的电源通路和故障检测信号通路增设应急处理,同时采用内部编程和温控取样变送输出两套方案来控制变频器的输出,彻底解决了因发射机风机控制器故障而造成的发射机停机故障,增强了发射机运行的安全稳定。 相似文献
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介绍半干法脱硫工艺首次在清江石化50万t/a重油催化裂化装置上的使用情况,结果表明,在保持原加工能力及相近工况下,半干法脱硫工艺可以将烟气中硫含量降至10 mg/m3以下,达到国家标准(低于100 mg/m3),同时还有助于降低催化烟气中的氮氧化物含量,对再生器流化、三剂旋风分离器和烟机运行无影响,取得了一定的工业应用效果。 相似文献
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C504是德国SIEMENS公司生产的单片微控制器,文中介绍了C504单片机在步进电机控制方面的应用,给出了利用C504的资源优势,经过一定的扩展来对步进电机进行控制和控制系统结构及方法,另外,该控制系统还具有人机对话功能和较高的性能价格比。 相似文献
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We present a multi-scale framework for the optimal design of CO2 capture, utilization, and sequestration (CCUS) supply chain network to minimize the cost while reducing stationary CO2 emissions in the United States. We also design a novel CO2 capture and utilization (CCU) network for economic benefit through utilizing CO2 for enhanced oil recovery. Both the designs of CCUS and CCU supply chain networks are multi-scale problems which require decision making at material, process and supply chain levels. We present a hierarchical and multi-scale framework to design CCUS and CCU supply chain networks with minimum investment, operating and material costs. While doing so, we take into consideration the selection of source plants, capture processes, capture materials, CO2 pipelines, locations of utilization and sequestration sites, and amounts of CO2 storage. Each CO2 capture process is optimized, and the best materials are screened from large pool of candidate materials. Our optimized CCUS supply chain network can reduce 50% of the total stationary CO2 emission in the U.S. at a cost of $35.63 per ton of CO2 captured and managed. The optimum CCU supply chain network can capture and utilize CO2 to make a total profit of more than 555 million dollars per year ($9.23 per ton). We have also shown that more than 3% of the total stationary CO2 emissions in the United States can be eliminated through CCU networks at zero net cost. These results highlight both the environmental and economic benefits which can be gained through CCUS and CCU networks. We have designed the CCUS and CCU networks through (i) selecting novel materials and optimized process configurations for CO2 capture, (ii) simultaneous selection of materials and capture technologies, (iii) CO2 capture from diverse emission sources, and (iv) CO2 utilization for enhanced oil recovery. While we demonstrate the CCUS and CCU networks to reduce stationary CO2 emissions and generate profits in the United States, the proposed framework can be applied to other countries and regions as well. 相似文献
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基于MVB总线的机车网络中央控制单元软件设计 总被引:1,自引:0,他引:1
阐述了一种基于MVB总线的机车网络设计的简要原理,简单介绍了这套网络设计的拓扑结构,重点介绍了其中央控制单元的软件设计。 相似文献
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相对于传统的无线抄录电表方式,基于Mobitex无线抄表方式具有数据量大、数值准确、效率高、实时性强、成本低等特点,具有十分重要的使用和推广价值。结合无线抄表系统的工作原理和结构特点,介绍了一种基于Mobitex无线通信网络的抄表系统,系统中Mobitex抄表器定时读取电表的电能量等数据,并通过Mobitex网络将数据上传到中心站,中心站管理软件对数据进行分析处理,实现线损分析管理等高级功能,同时,中心站管理软件可对抄表器进行远程在线升级软件、远程复位、补数等管理。系统目前已在鞍山市试点运行一年多,性能可靠,满足要求,实现了无线抄表系统的智能化管理。 相似文献
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Barry N. Taylor 《Journal of research of the National Institute of Standards and Technology》2011,116(6):797-807
A revised International System of Units (SI) proposed by the International Committee for Weights and Measures is under consideration by the General Conference on Weights and Measures for eventual adoption. Widely recognized as a significant advance for both metrology and science, it is defined via statements that explicitly fix the numerical values of a selected set of seven reference constants when the values of these constants are expressed in certain specified units. At first sight this approach to defining a system of units appears to be quite different from that used to define the current SI. However, by showing how the definitions of the seven base units of the current SI also fix the numerical values of a set of seven reference constants (broadly interpreted) when the values of these constants are expressed in their coherent SI units, and how the definition of the current SI can be recast into the same form as that of the revised SI under consideration, we show that the revision is not as radical a departure from the current SI as it might initially seem. 相似文献
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