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Search Results: 1 - 10 of 138707 matches for " 杨 雷 "
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1996年国家自然科学基金委员会数理科学部力学学科面上项目受理申请情况

力学进展 , 1996, DOI: 10.6052/1000-0992-1996-3-J1996-037
Abstract: 1996年国家自然科学基金委员会数理科学部力学学科面上项目受理申请情况杨雷国家自然科学基金委员会北京1000831996年国家自然科学基金项目申请受理工作已告一段落.截止到申请有效期限,力学学科共收到497份申请,比1995年申请项数(502项)l....
高速公路交通流优化模型及分析

重庆交通大学学报(自然科学版) , 1994,
Abstract: :?本文对高速公路进行了两级分段,以车流密度ρ(k)和主流速度v(k)作状态变量,将人口匝道车流量ri(k)作控制变量,建立高速公路非线性离散动态交通流数学模型和交通流优化模型,提出了模型中参数辨识的优化算法,分别建立了高峰期和非高峰期两种情况优化目标函数,最后,实际计算了西(安)临(潼)高速公路高峰期和非高峰期的优化状态.?
中俄大客机产业合作的现状及发展趋势?
?
俄罗斯东欧中亚研究 , 2014,
Abstract: 本文考察了中俄两国在大客机联合研制方面的进展情况,并深入剖析了两国合作面临的一系列内部和外部影响因素。促进因素有中俄两国互为近邻,两国特殊的关系推动了航空领域的合作,在航空领域积累了大量的合作经验;双方在技术、资金和市场方面各自具有一定的优势;面对复杂多变的国际局势和经济形势,面对欧、美航空工业强国的技术封锁,中俄两国要探讨更为有效的互利共赢合作方式。限制因素有双方航空产业结构过于相似,技术互补性差;两国对西方技术都存在某种程度的依赖;欧、美航空产业对中俄采取防范和竞争的姿态等。中俄客机产业合作的前景较为乐观,双方可以采取先项目合作,然后建立统一集团公司的两步走联盟战略。
新型干法智能燃烧器控制专家系统

武汉理工大学学报 , 2007,
Abstract: ?针对新型干法窑生产中分解、烧成温度不稳定的问题进行了分析,提出建立智能燃烧器控制专家系统来解决此问题的思路,并对构成专家系统的主要部分的知识库和推理机进行了详细的分析和论述。在分解炉喂煤和窑头喂煤上,重点对温度、风压、窑电流值等重要参数进行实时监测,实现对智能专家系统的设计。
决策要素动态变化的群体决策偏好演化过程
,
系统工程理论与实践 , 2014,
Abstract: ?研究交互式动态群体决策偏好收敛自适应过程的内在机制和规律,发现和控制影响群体一致度和偏好收敛时间的关键因素,以改善群体决策时间绩效.应用计算实验方法,基于deffuant有界自信假设的妥协策略,在微观层面上构建偏好演化动力学模型,模型符合群体决策共识过程原则要求;在模型基础上观察分析个体属性特征对一致性绩效、收敛时间绩效的作用.论文在决策成员社会惰性、空间位置、决策偏好动态变化的决策情景中,研究决策者社会惰性对群体决策偏好收敛时间的影响.建立了动态群体决策的概念框架,分别针对惰性不变的偏好演化模型和惰性变化的偏好演化模型设计了两个计算实验.实验1:比较不同社会惰性水平p*和不同选择半径r组合下,决策偏好时间tc的变化.实验2:比较不同惰性递增速率v和不同惰性递增上限ps组合下,决策偏好时间tc的变化.研究发现:1)社会惰性越大,对偏好收敛的阻滞效应越显著;2)r越小,tc随着p*递增的趋势更强;3)当扩大决策成员交互对象的选择范围,tc的波动减小,群体达成共识的时间更稳定;4)当社会惰性值随休眠持续期在一定范围内线性递增时,tc递增存在一个分界值.
蒙古国矿产资源布局与中蒙两国合作开发前景论证
Distribution of Mineral Resouces in Mongolia and the Prospects of Economic Development and Cooperation between China and Mongolia
 [PDF]

李靖宇, 张晨瑶,
World Economic Research (WER) , 2012, DOI: 10.12677/WER.2012.13005
Abstract:

摘 要:习近平副主席早在2008年6月访问蒙古国期间就签署的《中蒙经贸合作中期发展纲要》,标志着中蒙两国经贸合作关系特别是矿产资源合作开发进入了新阶段。由于蒙古国是中国实施睦邻、富邻、安邻政策的主要对象,矿产资源合作开发又是中蒙两国经贸合作关系发展的重要领域,所以双方表示今后将把矿产资源开发作为双边经贸合作重点来加大投入力度。为此,有必要从总体上扫描蒙古国矿产资源分布情况和开发态势,进一步认定中蒙两国合作开发矿产资源的有利条件,也要透视出中蒙双方合作开发矿产资源的不利因素,并且有针对性地提出中蒙两国加大力度合作开发矿产资源的对策创意:双方应当协调实施北水南调和海水西调工程,以解决矿区缺水问题;双方应当以大企业为主体开发运作重点项目,以解决投资风险问题;双方应当携手大力拓宽融资渠道,以解决基础设施建设进程迟缓问题;双方应当致力于全面强化友好合作关系,以解决矿产资源合作开发遇到的各种问题。作者认定,只有这样努力下去,才能有效推进中蒙两国合作开发矿产资源项目,进而以此为切入点在原有经贸合作的基础上大展宏图,为双方经贸合作关系得以持久发展注入强劲动力,共同拓展出合作开发矿产资源的光明前景。
Abstract: The Vice President of China Xi Jinping visited Mongolia and signed The Sino-Mongolian Economic and Trade Cooperation Medium-Term Development Compendium in June 2008, indicating that the economic and trade relationship between China and Mongolia entered a new phase, especially in the aspect of mineral resources cooperation development. Since Mongolia is the major object of Chinese friendly policy, and the cooperative development of mineral resources is an important area of economic and trade cooperation between China and Mongolia, the two sides claimed that they would develop the mineral resources for bilateral economic and trade cooperation in the future. Therefore, it is necessary to scan the general distribution and exploitation trend of the mineral resources of Mongolia. Then we try to find the favorable conditions of mineral resources development betweenChinaandMongolia. At the same time we should find the unfavorable factors of the Sino-Mongolian cooperation and development of mineral resources, and put forward the creative countermeasures about development of mineral resources. Both sides should coordinate the North-South Water Diversion Project and Sea water to West project to solve the water shortage problem of the mining areas. Both sides ought to operate the key projects by focusing on the large enterprises to solve the problem of investment risk. Both sides should work together to broaden the finance channels to solve infrastructure construction backwardness. Both sides should be committed to strengthening the friendly and cooperative relations to solve the various problems arising from mineral resource cooperation development. Only by this way can we promote the mineral resources development project between two countries effectively so as to inject vigor to bilateral economic and trade cooperation.

 

浅谈日本学校体育的现状及启发
Discussion on Japanese Schools’ Sports Situation and Inspiration
 [PDF]

永昌, 罗媛媛, 焦玉
Vocational Education (VE) , 2012, DOI: 10.12677/VE.2012.12005
Abstract:

70年代以来,日本经济随着现代科技的发展而突飞猛进,至今已列世界前茅,这促使日本社会向着信息化、国际化、多样化、老龄化方向发展,并引起价值观等多方面的变化。这些变化影响了日本中小学生的生活和意识的改变,促进了学校教育的改革。学校体育作为教育事业的一个重要组成部分,不容忽视。日本学校体育是以培养学生终身体育态度和提高学生体力、运动能力为目标,以培养学生体育学科能力为重点,精选教学内容,从而实行学校体育与家庭、社会体育一体化。为借鉴其他国家学校体育改革经验,本文主要通过文献二次研究法,收集与日本学校体育的发展有关的资料,对日本学校体育现状进行研究,并试着从中得到相应的启发,从而为我国学校体育发展提供借鉴。

With the development of modern science and technology, Japan’s economy has had a phenomenal growth since the 1970s. And so far its economy is the world vanguard, which gets promotes Japanese society towards informationization, internationalization, diversification, population aging and change values and other aspects more. These changes influence the Japanese primary and middle school students’ life and consciousness and promote the reform of the school education affect the life and consciousness of Japanese middle school students and pupils and accelerate the reform ofJapaneducation. School sports education as an important part of education career is not allowed to ignore should never be neglected. In order to take reference for school sports reform experience from other countries use the other countries’ reformation experience, this paper mainly adopts the literature secondary research method use documentation method to collect the every stages’ development of Japanese education. And this paper draws inspiration from the study of the current situation of Japanese sports education, thereby provides useful information to the development of our country's sports education. With select content of courses, Japanese education aims to foster students’ attitude of lifelong sports attitude, and improve students’ physical strength, athletic ability build up strength and emphasizes on fostering student’s academic ability in physical education, focusing on the selection of teaching content thus the implementation of school sports and family, social sports integration. So as to integrate the school education, home education and social education.

 

煤矿安全生产集成管理运行机制研究
Research on Working Mechanism of Coal Mine Safety Production
 [PDF]

金廷, 李占
Modern Management (MM) , 2012, DOI: 10.12677/MM.2012.23023
Abstract: 中国煤矿安全生产管理运行机制存在利益取向、责任划分、人文制度和监管机制方面的问题,为实现煤矿安全生产的集成管理,给出了安全生产外部监控机制、安全生产内部运行机制的再造思路,并从本质安全人及行为的分析视角,给出了安全文化的人文养育践行机制。
The benefit orientation, responsibility sharing, safety culture and administration system are the key issues of coal mine safety production in China. For the purpose of integrated management, reengineering the external control mechanism and internal working mechanism of coal mine safety production, constructing bring up and action system of safety culture from the human and its behavior of intrinsic safety.
TC4钛合金电子束冷床熔炼成分均匀性研究
Research on Composition Uniformity of TC4 Alloys during Electron Beam Cold Hearth Melting
 [PDF]

, 毛小南, 冠军
Metallurgical Engineering (MEng) , 2014, DOI: 10.12677/meng.2014.11005
Abstract:

研究采用不同的熔炼速度,电子束冷床熔炼TC4钛合金铸锭成分的均匀性。结果表明:电子束冷床熔炼出的铸锭成分符合国家标准,熔炼效果良好。在轴向上,从铸锭的顶部至底部,Al元素的含量呈下降的趋势,并且随着熔炼速度的降低,其下降的趋势增加;V元素分布非常均匀,没有偏析现象出现。在径向上,铸锭的各合金元素分布均匀。
The composition uniformity of TC4 alloys ingot during electron beam cold hearth melting which used different melting speeds was studied. The results show that the ingot produced by electron beam cold hearth melting accord with the national standard, with a good melting effect. In the axial direction of the ingot from the top to the bottom, the Al content presents a decrease trend, and as the melting rate decreases, the decrease trend is more evident. The V element distribution is uniform, and no segregation phenomenon appears. In the radial direction of the ingot, the alloy elements distribution is very uniform.

基于小波变换的遥感红外图像处理

红外 , 2005,
Abstract: 针对遥感红外图像噪声大、对比度低的问题,提出了应用小波变换实现图像的滤波和增强处理。通过对具体遥感红外图像的处理分析,验证了小波变换用于此类图像处理的有效性。
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