oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2019 ( 320 )

2018 ( 7112 )

2017 ( 7224 )

2016 ( 7796 )

Custom range...

Search Results: 1 - 10 of 308119 matches for " 王梦 "
All listed articles are free for downloading (OA Articles)
Page 1 /308119
Display every page Item
关于磁控电抗器磁阀重点参数的计算
Calculation on the Key Parameters of the Magnetic Valve Controllable Reactor
 [PDF]

, 范国栋
Transmission and Distribution Engineering and Technology (TDET) , 2012, DOI: 10.12677/tdet.2012.11001
Abstract:  

磁控电抗器因其独特的优点在电力系统无功补偿等方面得到了越来越多的应用,其原理是通过改变磁阀小截面处等效磁导率来平滑调节电抗,因此磁阀的设计对磁控电抗器的运行性能就有着重要的影响。本文从电抗器运行原理及过程状态出发,通过等效磁路对磁控电抗器磁阀重点参数进行了计算,并使用Matlab Gui实现程序的编写和界面的实现,最后针对设计结果进行Ansoft仿真,进一步验证了设计的正确性
 

Magnetic controlled reactor because of its unique advantages for reactive power compensation has been more and more applications, the principle is the smooth adjustment by changing the effective permeability of the small sec- tion of the reactor, so the design of the small section has an important effect on the operating performance of the mag- netic controlled reactor. Through the operating principle of the reactor and the process state, calculate the magnetic con- trolled reactor key parameters by an equivalent magnetic circuit, and procedures for the preparation and interface using Matlab Gui, finally verify the design results by the MagNet simulation.

武汉市城区生活垃圾收集处理现状调查
The Investigation of Domestic Waste Collection and Treatment in the Urban Zone of Wuhan
 [PDF]

, 易成豪
Sustainable Development (SD) , 2016, DOI: 10.12677/SD.2016.61006
Abstract:
作为特大城市和第四届“全国文明城市”,武汉市如何更有效快速地实现生活垃圾资源化、无害化、减量化已成为城市发展中亟待解决的问题。本文从武汉市城区生活垃圾产量、环卫情况、垃圾处理处置现状、垃圾处理现有项目等方面入笔,综述了武汉市生活垃圾的收运处理情况,整理了目前已建和在建的垃圾焚烧、垃圾卫生填埋、垃圾水泥窑协同处理项目。分析发现,武汉市生活垃圾年增长率为14.7%,在“五焚烧,两填埋,一综合”的垃圾处理布局下,垃圾焚烧率高达95%,垃圾无害化处理率达到100%。基于武汉市发展的特色与趋势,浅析其中存在的问题,并提出相应的解决对策。
As a megacity, Wuhan, has been named the fourth “national civilized city”. How to effectively and quickly achieve the goal of domestic waste recycling, hazard-free use and quantity reduction has become the urgent problem to be solved in the future of Wuhan. Based on the domestic waste output, the sanitation situation, the situation of garbage disposal and garbage disposal projects, this paper summarizes the status of domestic waste collector and garbage treatment in the urban zone of Wuhan. Constructed or under construction projects, such as waste incineration, hygienic sanitary landfill, waste cement kiln disposal in coordination are compiled. It has been found by analysis that annual growth rate of urban domestic waste in Wuhan is about 14.7%. The structure of waste treatment is “five incinerations, two landfills, a comprehensive treatment”, by which, the rate of incineration has reached up to 95%, and the hazard-free treatment rate of waste has reached 100%. Besides, this paper analyzes the existing problems and puts forward some corresponding solutions by taking the characteristics and trends of the development of Wuhan into consideration.
髌骨脱位诊断方法综述
Review of Diagnostic Methods for Patella Dislocation
 [PDF]

,
Medical Diagnosis (MD) , 2016, DOI: 10.12677/MD.2016.63013
Abstract: 髌骨损伤容易引起膝关节功能性障碍,常出现于年轻及运动较多、量较大的人群,而髌骨脱位则是其最常见的临床表现。目前来讲,在髌骨损伤诊断中,CT扫描图像有着重要的临床价值,通过CT扫描图像测量获得的与髌骨、股骨相关的数据,如Q角、髌骨倾斜角、外侧髌骨移位值、TT-TG等数据为主治医师的诊断提供了重要的数据支撑,在一定程度上提高了主治医师对髌骨损伤类型诊断的正确率。
Patella injury which often occurs in the young people with more exercise can cause functional disorder of the knee joint, and patellar dislocation is one of the most common clinical manifestat- tions. At present, CT image has the important value in the patella injury clinical diagnosis, and the date related to patella and femur obtained by CT such as Q angle, patella tilt angle, lateral patella displacement value and TT-TG can provide the important data support for the physician’s diagnosis, and also improve the diagnostic accuracy of the patella injury on some level.
手机通话对驾驶行为影响的实验范式综述
The Impact of the Phone Talking on Driving: A Review of the Experimental Paradigms
 [PDF]

, 纪妹
Advances in Psychology (AP) , 2013, DOI: 10.12677/AP.2013.36045
Abstract: 人们很长时间以来关注通电话为什么会对驾驶行为产生不利影响。目前,一些研究者对此类问题的研究重点已经从驾驶过程中使用何种类型的手机转向具体通话内容对驾驶的影响。研究表明通话任务的内容本质才是影响驾驶行为的关键。然而,人们会根据驾驶的具体情况,有意识地采取分配策略以避免危险事件的发生;而且不同驾驶经验的人对待这两个任务的操作方式也有所不同。文章将结合次任务的不同类型,介绍跟车任务范式、视觉搜索任务范式、改变任务范式和练习任务范式在研究中的应用,展望该领域的研究新方向。
 People have concerned about why the mobile phoning distracted attention from driving in a long time. Currently, some researchers have shifted their interest from the effect of phone type to the specific conversations on driving. Studies showed that the nature of the conversation was the key to distracted driving. However, Studies also showed that according to the specific driving situation, people would consciously adopt allocation strategy to avoid dangerous incidents. Moreover, people with different driving experience operated the two tasks in different ways. In this paper, four kinds of experimental paradigms combined with different types of secondary tasks, car task, visual search task, change task and practice task were summarized. That will help us to find the new directions in this field.
非线性联合均值方差模型的统计分析
Statistical Analysis for Nonlinear Joint Mean and Variance Models
 [PDF]

, 徐登可, 杨佳红,
Statistics and Applications (SA) , 2014, DOI: 10.12677/SA.2014.32010
Abstract:

在提出非线性均值方差模型的基础上,研究了该模型中未知参数的估计问题。主要是基于Gauss-Newton迭代算法给出该模型中未知参数的极大似然估计。通过大量随机模拟实验验证了所提出方法的有效性。最后,结合实际问题数据验证了该模型与方法具有实用性和可行性。
We propose nonlinear joint mean and variance models in this paper and investigate the estimate for unknown parameters in the model based on Gauss-Newton iterative algorithm. Furthermore, we make some simulations to show that the proposed procedure works satisfactorily. Lastly, two real examples are presented to illustrate the proposed methodology.

北京地铁浅埋暗挖施工法

岩石力学与工程学报 , 1989,
Abstract: 本文介绍浅埋暗挖法施工技术在北京地铁复兴门折返线工程中的应用.该技术以新奥法原理为基础、结合工程实践,对地层进行注浆加固、正台阶环行开挖、网构拱架支护、施工监测、信息反馈和复合衬砌等一整套施工技术和工艺,在覆跨此为0.7的浅埋大跨度、无胶结、无自稳的砂卵石地层中安全建成,控制了地表沉陷,最大沉陷量不超过30mm,沉陷一时间曲线拐点最大斜率为1/589,地层损失系数为4.13%,本工程为城市修建地铁开辟了一条新路.
煤矿立风井备用防爆门及复位技术研究与应用

煤炭科学技术 , 2014,
Abstract: 为解决矿井灾变时期立风井快速复位、密封的关键技术难题,研究了煤矿立风井备用防爆门及快速复位技术。备用防爆门变形模拟与抗冲击试验结果表明:备用防爆门能承受最大应力为189MPa,最大弹性变形量322mm,所设计的备用防爆门系统与现有防爆门完全相互独立,能够在煤矿井下发生瓦斯爆炸后,快速封盖风井井口,发挥与原防爆门相同的功能,既能正常通风又能反风。备用防爆门系统中还设置有活动风门,当井下发生二次甚至多次爆炸的情况下,风门能自动打开、复位,以保证矿井灾变时期的正常通风。
台湾海峡海底铁路隧道建设方案

重庆交通大学学报(自然科学版) , 2011, DOI: 10.3969/j.issn.1674-0696.2011.supp2.008
Abstract: :?从国内外江、河、海底隧道的建设经验出发,根据长隧道及高速铁路隧道的设计、施工经验,论述了台湾海峡海底隧道采用铁路隧道方案的合理性;给出了台湾海峡海底隧道的断面形式、断面面积及洞门形式建议方案;提出了台湾海峡海底隧道选择施工方案要点;介绍了国内江河海底隧道的建设情况;重申审核工程修建好坏的理念,及修建过江、过海隧道比桥梁的优点;最后给出了修建海底水下隧道急需深入研究和解决的重大关键技术问题。
中国高速铁路快速建成创新方法及业绩

科技导报 , 2014,
Abstract: 京津城际铁路是中国第1条世界一流的高速铁路,该工程长120km复线,从施工、调试到运营仅用了1年半时间,是对中国高速铁路各种创新成果进行试验应用的检验,是示范性工程,也是今后进行其他成果试验、研究创新的基地。
变形变化引起的结构物裂缝技术讲座(四)

工业建筑 , 1977, DOI: 10.13204/j.gyjz197701012
Abstract: 十一、钢筋混凝土预制构件钢筋混凝土预制构件的类型较多,无论那种类型的预制构件,裂缝现象相当普遍。裂缝对于构件的防渗、钢筋防锈、混凝土防碳化(防中性化)等都起不利影响,应尽力加以控制。构件在制作和施工中出现的裂缝,称为“早期裂缝”,在车间投产后使用过程中出现的裂缝,称为“后期裂缝”。以下介绍几种主要构件的典型裂缝及初步分析意见。1.预应力大型屋面板在屋盖结构中,大致可分为肋板结构和平板结构两种。其它还有少量的曲面壳板结
Page 1 /308119
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.