共查询到20条相似文献，搜索用时 62 毫秒
1.
论述了中国互联电网发展的客观需要,说明了特高压直流输电技术是我国电力跨区域大规模输送的必要性;例举了特高压直流输电工程在国外的发展状况;简要介绍了特高压直流输电发展现状;指出了发展过程中存在的主要技术问题;说明了特高压直流输电建设在未来的发展规划和前景。 相似文献
2.
我国特高压电网建设方兴未艾,特别是在西部地区,特高压电网将我国西部地区的能源,源源不断地送往东部地区。由于西部地区存在着大量的沙漠地段,特高压输电线路就不可避免地要经过沙漠地段,特高压输电线路具有杆塔高、塔材重等特点,由于沙漠具有显著的流动性和分散性,对经过沙漠地段的杆塔基础就要合理地选择基础型式,以避免风积沙地区沙丘等对杆塔基础的影响,保证特高压电网的运行安全,增加其使用寿命。因此着重探讨特高压输电线路风积沙地区的基础选型,以此保证特高压输电线路杆塔基础有足够的承载力和耐久性,从而建设坚强智能特高压电网。 相似文献
3.
4.
5.
6.
7.
8.
随着特高压和智能电网技术的快速发展以及电网规模的快速增长,加快重点专业人才培养是当前电网企业一项重要而紧迫的工作。本文紧密结合电网企业实际,针对网省电网企业在重点专业人才培养方面普遍存在的问题和不足,提出了加快重点专业人才培养的具体措施,更好满足电网企业发展的人才需求。 相似文献
9.
《阅读与作文(高中版)》2014,(20)
正投资要点:1、交流特高压的争议终有定论。2、有望带动产业链上多个环节企业受益。近日,有媒体报道多年来围绕交流特高压的争议终有定论,能源局决意放行特高压交流项目。一份由电力规划设计总院制定的电网投资方案已经通过了中国国际工程咨询公司的评估,很快将获得能源局批复,这个方案包含4条交流、5条直流和3条500KV直流线路。我们认为,能源结构调整、雾霾治理以及电能替代的推进等多因素决定特高压建设大规模开建。从 相似文献
10.
电力能源是维持国家经济发展的重要物质基础,也是维持我国居民生活质量水平的重要因素.电网工程建设是实现电力能源有效传输的重要环节,加强电网建设工程管理工作,对于我国社会和经济发展具有非常重要的意义.本文就10kV电网建设工程管理展开详细论述,对具体的工程管理内容进行了有效的说明和分析,希望对于我国电力事业发展起到一定的推动作用. 相似文献
11.
12.
13.
《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
14.
《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
15.
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
16.
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
17.
18.
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
19.
20.
唐芳 《读与写:教育教学刊》2008,5(6)
During interview with English majors, it was found that a majority of students expressed disappointment with their experience of English literature classes. Students' dislike of learning English literature appears to be the major problem of teaching English literature in China. Reader response approach is a good way to solve this problem. In this paper, I explain the rationale behind the reader response approach, such as its origin, definition, features, assumptions, and strategies. Then I illustrate how reader response approach works as a teaching strategy by presenting several teaching models. At last I evaluate its usefuiness for teachers and present the advantages of reader response approach in Chinese context. 相似文献