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Search Results: 1 - 10 of 103855 matches for " 蔡永龙 "
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肯尼亚Olkaria地热资源井口分布式地热电站抽真空系统的优选
Optimal Selection of Vacuum System for Distributed Wellhead Geothermal Power Plants at Olkaria in Kenya
 [PDF]

正敏, 李雪宁, 隆强, 李兴财, 朱继伟,
Clean Coal and Energy (CCE) , 2015, DOI: 10.12677/CCE.2015.31001
Abstract:
本文对地热电站中的抽真空系统设计方案进行了对比分析,给出了地热电站不同的抽真空系统的设计方案。最后以肯尼亚Olkaria地区的地热蒸汽参数为例对地热电站中的抽真空系统进行了对比分析并给出了结论,为该地区的地热电站的设计提供了理论基础。
A comparative analysis on the design of vacuum system has been performed. Several schemes of design were proposed. By the comparative analysis on vacuum systems in geothermal power plants, a conclusion has been presented based on the steam parameters at Olkaria in Kenya, which provides a theoretical basis for the design of geothermal plants at this area.
基于方向信息测度约束的自适应血管跟踪方法
俞恒,牟轩沁,
电子学报 , 2002,
Abstract: 针对血管的叠加与分叉问题,本文提出了一种基于象素方向信息测度约束的自适应血管跟踪方法.在启发式血管追踪过程中,本文构造了一种边缘度量函数来检测血管边缘.同时,本文还引入了一些措施来提高血管追踪精度,如步长自适应调整、方向惯性机制、四边形修正方法等.试验结果表明,本文方法在血管发生叠加和分叉时,可以正确的对血管进行跟踪,达到令人满意的效果.
近10年珠三角城市群经济承载力及空间分异
Economic Carrying Capacity and Spatial Difference in Pearl River Delta City Group Over the Past 10 Years

陈忠暖 刘松
- , 2017,
Abstract: 以珠三角城市群内9个城市为研究对象,选取18个经济发展水平梯度差异较小的区域内的城市为样本数据,运用修正之后的人口—经济承载力模型,测度珠三角城市群及内部九大城市2005—2014年的经济承载力水平,并分析经济承载力水平的空间分异. 研究结果显示:珠三角城市群经济承载力趋于小幅波动状态,但城市群内部极化效应显著,涓滴效应仍处于较低水平,区域经济一体化水平较低;城市群内部城市经济承载力等级分化严重,形成以深圳市、广州市、珠海市和佛山市为第一层级,东莞市和中山市为第二层级,惠州市、江门市和肇庆市分列三~五层级的经济承载力等级体系;地理空间上,形成以深圳市、广州市和珠海市为核心的三大区域,三大区域的经济承载力水平变化趋势为:广州市-佛山市-肇庆市(广佛肇),深圳市-东莞市-惠州市(深莞惠),珠海市-中山市-江门市(珠中江);近10年,珠三角城市群经济承载力呈东高-西低的发展状态,西岸塌陷的阴影效应十分显著.
:The Pearl River Delta is the frontier region of Chinese economic reform and opening up. To some extent, although the economy has gained rapid development, the level of regional economic difference has gradually increased. Therefore, taking in nine cities of pearl river delta urban agglomeration as the research object, selecting 18 regional cities with smaller economic development gradient difference as sample data, the level of economic capacity the pearl river delta urban agglomeration and internal nine big city from 2005 to 2014 is tested after using revised model measure, and the spatial difference of economic bearing capacity is analyzed. It is concluded as follows:Firstly, the economic bearing capacity of the pearl river delta urban agglomeration tend to be small fluctuations, but, the interior of the urban agglomeration, polarization effect is very significant; the trickle-down effect is still in the lower levels, and the trickle-down effect is still at the lower level. Secondly, internal urban agglomeration, the level differentiation bearing capacity of urban economic level is very serious, formed in Shenzhen, Guangzhou, Zhuhai and Foshan as the first level, Dongguan and Zhongshan to the next level, Huizhou, Jiangmen and Zhaoqing took three to five levels of economic bearing capacity rating system. Thirdly, the three core area is formed including Guangzhou, Shenzhen and Zhuhai, and the changing trend of three regional’ economic bearing capacity level is Guangzhou-Foshan-Zhaoqing (Guang-Fo-Zhao), Shenzhen-Dongguan-Huizhou(Shen-Guan-Hui), and Zhuhai-Zhongshan-Jiangmen(Zhu-Zhong-Jiang) in the geographical space. Finally, for nearly 10 years, the carrying capacity of the pearl river delta urban agglomeration in east area is higher than the western, and the shadow effect of west bank collapse is significant
川东地区黄草峡构造嘉陵江组嘉二段储层特征及主控因素
Characteristics and Controlling Factors of Second Member of Jialingjiang Formation Reservoir in the Huangcaoxia Structure of East Sichuan
 [PDF]

王伟, 胡明毅, 胡忠贵, 陈守春,,, 王丹, 全升, 潘勇利, 王志峰
Advances in Geosciences (AG) , 2013, DOI: 10.12677/AG.2013.33024
Abstract:
嘉二段是川东地区嘉陵江组主要储层发育段和含气层段,而黄草峡构造是主要的有利储层发育区之一,对其储层研究对该地区勘探开发具有重要的指导意义。通过岩心、薄片、测井资料的综合分析,认为川东地区黄草峡构造嘉二段主要储集岩为颗粒云岩和晶粒云岩,储集空间主要为粒内溶孔、晶间孔、晶间溶孔和构造缝、压溶缝;储层主要发育在嘉二2亚段,储集类型属裂缝孔隙型。其储层发育受控于沉积相带分布、成岩作用类型和构造改造,其中云坪和鲕滩微相为有利储集相带,云化作用和溶蚀作用有利形成大量孔隙空间,构造的改造增大储层的渗透性有利高质量储层的形成。
The Jia-2 member is the main reservoir and gas-bearing interval of Jialingjiang formation in the Northeastern Sichuan area. Research on the reservoir has guiding significance to exploration and developing of this area, since Huangcaoxia structure is one of the main favorable areas. Based on the analysis of core, thin section and well logging data, second member of Jialingjiang Formation in Huangcaoxia structures of East Sichuan is identified as different types of dolostone reservoirs, which mainly develop in the subsection of . The reservoir type is defined as fracture-pore type, and the main reservoir spaces are intergranular denudation pore, intercrystalline pore, intercrystalline denudation pore, tectonic fractures and pressolutional fractures. The reservoir is controlled and influenced by sedimentary facies, diagenesis and tectonic factor. The dolomite flat and Oolite bank microfacies are the best reservoir facies belt. Dolomitization and denudation can help to form many pore spacies, and permeability of the reservoir can be enlarged by tectonic factor. These contribute to form a high quality reservoir.
水稻籽粒受容活性及其控制途径――Ⅰ.籽粒含水率与受容活性的关系
王余 , 建中 ,, 华鹤良
扬州大学学报(农业与生命科学版) , 1990,
Abstract: ????1986-1988年,在大田、盆裁、水培条件下,对16个籼粳不同类型水稻品种的籽粒含水率、灌浆速率、相对生长率、呼吸强度等进行了研究。结果表明:(1)抽穗后水稻籽粒含水率的动态过程可分为缓慢下降,迅速下降、平稳下降三个时期;(2)籽粒含水率与灌浆速率呈单峰偏态曲线,在籽粒含水率50-55%时段灌浆速率出现最大值,籽粒停止灌浆的临界含水率为20%左右;(3)籽粒含水率与籽粒相对生长率、呼吸强度均呈指数关系,相关指数均达到极显著水平。
利用粉煤灰合成沸石及其去除水中重金属的实验研究
王焰新,,杨志华,鹤生,X.,Querol
中国科学 地球科学 中国科学 地球科学 , 2003,
Abstract: ?在水热条件下直接对粉煤灰进行晶化,合成反应结束后得到的产物有NaP1沸石、方沸石、菱沸石三种沸石.粉煤灰转化为单种沸石的最大转化率为40%~75%左右,总转化率达60%~80%左右.实验结果表明,合成体系中的涡流、粘度以及温度、时间、NaOH浓度等参数对合成沸石品种及转化率影响较大.利用合成沸石去除水中Cu2+,Pb2+和Cd2+分批实验表明,合成沸石对重金属的吸附容量比粉煤灰的高.
聚对苯甲酰胺液晶态球晶生长机理
陈寿羲,程奋,,丽英
高分子学报 , 1982,
Abstract: 本文用热台偏光显微镜和透射电子显微镜研究了聚对苯甲酰胺(PBA)/H2SO4液晶态生长球晶的形态结构和结晶机理。结果表明,PBA/H2SO4向列型液晶相具有过冷状态,可达30—40℃左右,并可生长球晶结构,一般直径可达5毫米左右。20Wt%溶液在不同的过冷态结晶时,可以生成三种形态的球晶结构,这是由于构成球晶的基本结构单元——有序微区结构在不同过冷条件下堆砌排列的规整程度不同的缘故。球晶的形态结构只与过冷程度有关,而与溶液的浓度无关。同时还研究了变温和剪切应力下结晶的球晶形态。
基于先验信息的二值血管锥束迭代重建
俞恒,牟轩沁,汤少杰,
电子学报 , 2004,
Abstract: 基于旋转DSA(DigitalSubtractionAngiography)的血管三维重建是当前医学图像处理领域的一个新的研究热点,具有广阔的应用前景.本文在SART(SimultaneousAlgebraicReconstructionTechnique)算法的基础上,根据穿过每个体素的锥束射线误差的加权平均值,构造了二值体素状态转移的概率函数,实现了一种适用于二值三维图像的迭代重建算法.针对二值三维血管的特点,本文采用最大均匀性准则作为重建目标的先验信息对迭代过程进行约束,使得迭代过程具有很好的体积聚类功能,大大提高了三维图像的重建质量.以Defrise模型和冠状动脉模型作为研究对象,试验结果表明,本文的重建算法在抑制噪声保持目标结构信息等方面优于经典的Feldkamp算法.
非连续运行设备贮存-工作联合退化模型及其应用
,冯静,孙权,周经伦,
电子学报 , 2012,
Abstract: 对某些非连续运行的设备,贮存状态和工作状态会交替出现,工程上可通过观测其关键性能参数变化监控设备健康状态,并以此为依据对其寿命和可靠性进行预测分析.针对该类设备,本文综合分析其贮存和工作条件下性能退化规律,建立设备贮存-工作联合退化模型,利用性能退化数据的拐点特性对该联合退化模型的参数进行估计,在此基础上,实现设备的可靠性分析和寿命预测.最后以金属化膜电容器为例建立了联合退化模型,分析该电容器的可靠性并预测寿命.
一维vrm非轴对称虚共焦腔谐振模的计算
冯国英,吕百达,孔繁,邦维,
强激光与粒子束 , 1997,
Abstract: ?基于快速傅里叶变换,提出了等效空间频谱传输法并计算了一维变反射率镜(1dvrm)非轴对称虚共焦腔板条激光器的谐振模,与均匀反射率镜(urm)和二维旋转对称变反射率镜(2dvrm)非轴对称虚共焦腔作了比较。在计算中考虑了腔的非轴对称性和激活介质的增益饱和特性。数值计算结果表明,一维变反射率镜非轴对称虚共焦腔具有高提取效率和高光束质量的优点。
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