共查询到20条相似文献，搜索用时 421 毫秒
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蒋永峰 《湖州职业技术学院学报》2010,8(1):6-9
太阳能是目前广泛利用的清洁可再生能源,PLC技术已被广泛应用在各种自动控制系统中,两者结合起来对众多宾馆、厂矿、学校等企事业单位的供热水锅炉进行升级改造,使太阳能供热水技术与锅炉供热水技术良好结合,优势互补,达到节能省钱、清洁环保、成本低廉之目的。采用三菱PLC控制器FX2N-32MT、太阳集热器、组成锅炉供热水控制系统,试验证明控制效果良好。 相似文献
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分析现有空调系统的形式和所存在的问题,同时根据某药厂具有大量可利用的汆热的特点,提出了增加溶液除湿机组的改造方案。针对独立除湿改造方案及原有方案进行初投资、年运行费用、项目投资回收率、基础能源消耗量等经济性参数的比较,增加溶液除湿机组的方案节能效果及经济效益显著。 相似文献
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结合江西分宜国产1×330MW循环流化床机组给煤机的选型情况,对循环流化床锅炉给煤机采用一级给煤系统和二级给煤系统进行了技术经济比较,并对其国产200MW循环流化床机组锅炉给煤机在工程应用中的改造情况进行了介绍;同时提出了循环流化床锅炉给煤机的选型推荐意见。 相似文献
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涂卉芳 《江西电力职业技术学院学报》2001,14(1):9-12
石洞口电厂针对＃4锅炉燃烧系统存在的问题进行了改造。改造后，锅炉达到了1 20 MW不投油稳定燃烧和低NOX燃烧。对其改造的关键技术作了分析。分析结果表明，该技术对 存在类似问题的锅炉改造有着重要参考价值。并能为国内设计、制造厂家提供新的思路。 相似文献
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结合某火电厂废气污染物的监测和改造经验,总结了锅炉废气污染物特点,并采用布袋除尘、戈尔薄膜过滤、除雾、3层脱硫塔喷淋等双碱法脱硫综合治理技术有效控制了废气污染;以该火电厂燃煤锅炉为例,对锅炉废气处理系统改造工艺进行了分析,改造后的烟气脱硫净化系统能连续可靠运行,废气经布袋除尘、双碱法脱硫后,各类废气排放的浓度远低于相应标准限值,可实现达标排放。 相似文献
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随着我国经济改革的深入发展,高校的招生人数不断增加,后勤设施老化落后,特别是浴室设备,造成水利资源的严重浪费,对已超负荷运转的后勤,更是雪上加霜。如何利用现有浴室,在不增加供热、供水的情况下,解决在校学生的洗浴问题,已成为高校后勤工作者研究的重点。针对这种情况,我校98年在浴池改造中通过广泛调研,在承德新龙公司的大力配合下, 相似文献
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张琳 《成都航空职业技术学院学报》2014,30(4):45-47
文章基于虚拟技术,制订网络配置经济房虚拟化系统方案。该方案对网络配置机房进行改造,发挥现有计算机设备的功能,营造满足计算机实验需要的网络环境。改造后的计算机不仅可以独立进行网络配置实现,而且可以进行联合性的网络实验。 相似文献
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杨怀恩 《山西广播电视大学学报》2002,7(1):4-8
现代远程教育正以前所未有的速度迅猛发展,在教育系统中发挥着越来越重要的作用.电大是现代远程教育的主力军,已是不争的事实.所以,山西电大一定要不失时机地搞好现代远程教育基础建设,在摸准现有基础建设情况的前提下,制定出发展总体目标,搞好拟建项目的主要功能、具体内容(含旧设施改造)的费用概算、方案的执行步骤及投资计划等,认真分析项目陆续建成并投入使用后可产生的社会效益和经济效益,制定方案落后的保证措施,真正使山西电大在山西省现代远程教育中发挥好主力军作用. 相似文献
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《海外英语》2007,(5):10-11
Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help? 相似文献
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邱崇丙 《唐山师范学院学报》2014,(1):21-23
汉字的六书,《说文》对“转注”一类,语焉不详。后世学者提及转注,也仅限于许慎所举出的例字。《汉字例说》一文,作者从转注的角度综合考虑,对部分现代常用字作了分析,跟传统的解释有所不同。希望能抛砖引玉,互相切磋,以推进学术研究。 相似文献
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《海外英语》2007,(4):36
There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love. 相似文献
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Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject. 相似文献
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Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities. 相似文献
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RUZBEHANI Mohsen 《重庆大学学报(英文版)》2004,3(1):20-25
1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec… 相似文献
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Rachel Zupek 《海外英语》2007,(11):40-41
我们绝大部分人都同意一件事情——我们喜欢金钱。但是你对金钱的喜欢之情足够到让你创立一份事业么?.财富通常被人忽视,主要在于人们不能真正了 相似文献