oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2019 ( 124 )

2018 ( 2338 )

2017 ( 2382 )

2016 ( 2571 )

Custom range...

Search Results: 1 - 10 of 112445 matches for " 肖志远 "
All listed articles are free for downloading (OA Articles)
Page 1 /112445
Display every page Item
基于三维GIS的长江流域水利综合站网展示系统的设计与实现
Design and Realization of the Yangtze River Basin Water Conservancy Station Network Display System Based on 3D GIS
 [PDF]

, 陈春华
Journal of Water Resources Research (JWRR) , 2015,
Abstract:
本文阐述了长江流域水利综合站网展示系统建设的目标和意义,在需求分析的基础上提出系统设计的总体架构和技术路线,并从数据组织、数据访问、缓存技术以及瓦片金字塔和GIS服务技术等方面分析了系统实现的关键支撑技术,最后就系统的功能结构和主要实现的功能模块进行了介绍。
This paper expounds the goal and the significance of the Yangtze River basin water conservancy station network display system. The overall framework and technical route of system design was proposed based on the analysis of demand. The key technologies of realizing system including the data organization, data access, cache technology and tile Pyramid and GIS services etc. were discussed. Finally, the function of system structure and main modules were introduced.
gis在堰塞湖应急水文容积曲线计算中的应用
高露雄,
人民长江 , 2015,
Abstract: ?容积曲线是堰塞湖应急处置过程中的重要依据。针对堰塞湖应急处置概略调查阶段可用水文资料不足的问题,在当前应用模式的基础上,提出一套基于gis技术的容积曲线快速计算方法。利用arcgishydrotools工具计算得出云南鲁甸红石岩堰塞湖库容曲线,并将计算结果与srtm公开数据进行比对。对比结果表明,该方法数据获取成本低、计算速度快、计算精度满足应急匡算需求。该方法对于资料充足情况下的容积曲线计算也具有借鉴意义。
知识冗余对外包服务企业知识吸收能力的影响
,
图书情报工作 , 2011,
Abstract: ?论述知识冗余的长度和宽度与知识吸收能力之间通常是倒u型的关系,知识冗余的深度和相关度与知识吸收能力之间通常是正相关的关系。指出适当拓宽知识冗余的长度和宽度,尽量加深知识冗余的深度和相关度,明确企业的外包发展模式和外包领域可以有效提高外包服务企业的知识吸收能力。
220 kV/3 kA冷绝缘高温超导电缆的轴向温度分布
Longitudinal Temperature Distribution for 220 kV/3 kA CD HTS Cable
 [PDF]

, 王银顺,,, 代常会, 薛驰, 赵连岐
Transmission and Distribution Engineering and Technology (TDET) , 2012, DOI: 10.12677/TDET.2012.12002
Abstract: 对远距离输电高温超导电缆而言,液氮在电缆导体骨架与低温容器内如采用反向循环流动制冷方式会导致电缆两端温差过大,因此高温超导电缆应采用液氮同向流动的制冷方式。由于波纹管具有优良的机械强度与热补偿特性,使其在高温超导电缆中得到了广泛应用,它可以形成冷却超导体用的制冷液氮的流通通道。在高温超导电缆设计之前有必要对液氮在波纹管中的流动特性进行研究。文章对波纹管通道内液氮流动的摩擦系数随雷诺数的变化规律进行了研究分析,得到了220 kV/3 kA高温超导电缆液氮流动产生的泵浦损耗值。在得到了高温超导电缆的各项损耗值之后,对高温超导电缆的温度分布进行了研究,并得到高温超导电缆温度分布方程以及温度分布规律曲线图。
For long distance transmission HTS cables, co-flow cooling of LN2 should be adopted, since that counter- flow cooling of LN2 incable former and cryostat may lead to large temperature difference between cable terminals. Due to their extraordinary property of mechanical strength and thermal compensation, corrugated pipes can be widely used in flowing channels of cooling liquid nitrogen (LN2), the coolant of superconductors. Hydraulic characteristics of LN2 incorrugated pipes are needed to be studied in design of high temperature superconducting (HTS) cable. Variation law of friction factors with Reynolds number for LN2 flow in corrugated pipes is systematically studied, and therefore value of pumping loss, which is caused by LN2 flowing in the corrugated pipe channels, for 220 kV/3 kA HTS cables can be obtained. Based on all items of losses of HTS cable calculated, equations and curve of temperature distribution for HTS cable can be finally obtained.
库车坳陷致密裂缝孔隙型砂岩储层评价的物性界限探讨
Discussion on Evaluation Scheme of Physical Property Boun-dary for Tight Fractured Porous Sandstone Reservoirs in Kuqa Depression
 [PDF]

任康绪, 中尧, 曹少芳, 袁文芳, 张荣虎,
Advances in Geosciences (AG) , 2012, DOI: 10.12677/AG.2012.24028
Abstract: 塔里木盆地库车前陆盆地冲断带经历强烈构造应力作用,勘探目的层古近系白垩系埋藏超深,储层致密,基质物性非常差,但构造裂缝相对比较发育,为具有双孔双渗特征的致密裂缝孔隙型砂岩储层。储层产能大小主要与地层渗透率有关,而与孔隙度关系不明显。大量未充填半充填构造裂缝是这类致密储层总渗透率的主要贡献因素。基于单井测试资料讨论了不同产能对应地层渗透率的界限。对构造裂缝的贡献按照四个层次进行评价。建立了适合库车坳陷致密裂缝性砂岩天然气勘探的储层物性综合评价方案。
Experienced a strong tectonic stress, the main exploration layers of Cretaceous-Paleogene in thrust belt of Kuqa foreland basinofTarimbasin buried deeply and were very tight. The reservoirs were characteristic of very poor physical property about the matrix but with abundant tectonic fractures. They were tight fractured porous sandstone reservoirs with dual-porosity and dual-permeability. Reservoirs productivity of the studied area were controlled defini- tively by the total stratum permeability and have no obvious relation with the porosity. Unfilled and semi-filled struc- tural fractures are the main contributing factors for the total permeability of the tight reservoirs. Boundaries of stratum permeability for different reservoirs productivity were proposed based on well testing data. Tectonic fractures were evaluated in four types according to their contribution for the stratum permeability. A scheme of evaluation parameters about the tight fractured porous sandstone reservoirs adapting to the natural gas exploration in Kuqa depression was established.
共价半导体的化学键模型
霍裕平,,
物理学报 , 1962,
Abstract: 本文讨论了如何用化学键概念来描述半导体性质,特别是迁移现象。为了方便我们具体针对Ⅲ-V族化合物,通过电子在键间的过渡机率来表述电流,并讨论了电子跃迁的两种机构。最后我们讨论了杂质散射,当把杂质原子对较远和近邻电子的作用区分开后,得到了两种散射机构,相应迁移率部分分别正比于T3/2及T-1/2。
浙贝母低温解除休眠过程中可溶性蛋白质的含量变化
高文,,培根
中国中药杂志 , 1997,
Abstract: 分析了浙贝母低温解除休眠过程中芽、鳞片近轴面表皮和鳞片内部组织可溶性蛋白质的含量变化。各部位的曲线在低温处理25天或35天时均有一峰出现。3个部位的蛋白质含量在休眠解除前期均表现出上升趋势。
红花种子萌发初期的生理生化研究
高文,,培根
中国中药杂志 , 1996,
Abstract: 通过分光光度计和电泳等实验技术,研究了红花种子萌发初期过氧化物酶、酯酶和可溶性蛋白质等的变化。
常用中药浙贝母的研究进展
高文,,培根
中国中药杂志 , 1996,
Abstract: 从栽培、育种、组织培养、生长发育机理、化学成分、药理作用以及生药与加工等方面对浙贝母的研究进行了综述。
浙贝母低温解除休眠过程中过氧化物酶的电泳分析
高文,,培根
中国中药杂志 , 1997,
Abstract: 为了探讨浙贝母低温解除休眠的生理机制,利用电泳方法研究了芽、鳞片近轴面表皮与鳞片内部组织3个部位在休眠解除过程中过氧化物酶同工酶的变化。发现芽和鳞片不同部位的同工酶谱带在解除休眠的不同时期均有变化,且芽和鳞片近轴面表皮的过氧化物酶活性明显高于鳞片内部组织。这些结果说明芽和鳞片都参与了休眠的解除。
Page 1 /112445
Display every page Item


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