酒店气象专用电视频道技术方案     

郑虹晖  尹群  翁锦辉 《气象研究与应用》2003,24(3):50-52

阐述了酒店气象专用电视频道的工作原理,同时还推荐了本系统软硬件具体的配置,最后对专用系统软件的工作流程及其使用方法进行了详细的说明。  相似文献   

Quantitative Evaluation of Water Deposited By Dew on Monuments   总被引：1，自引：0，他引：1  

Dario Camuffo  Roberta Giorio 《Boundary-Layer Meteorology》2003,107(3):655-672

Samples of White and Green Carrara marble, and three types oflimestone and brick exposed in the field vertically and horizontally were used to evaluate condensationon monuments during clear sky nights. Experiments in a simulation chamber under controlledconditions led to a general equation for the actual amount of water deposited on a surface by dew.This is determined by: How much and for how long the surface temperature falls below the dew point,the moisture content in the air and the ventilation. On clear nights, the condensation on buildingstructures facing the sky may reach some 0.2 kg m^-2 (or 0.2 mm), whereas condensation on verticalsurfaces is very small. Computation of the seasonal trend of night-time condensationshowed that the maximum amount of water condensed per night occurs in the autumn, with the moreabundant concentration of moisture in the air. The total amount of water condensed per month isfound to be a maximum in the summer-autumn period. Morning condensationfor the thermal inertia of monuments is also relevant, and has been calculated to reach the same order of magnitude as thenocturnal dew. A detailed analysis of the temperature and mixing ratio profiles near a condensingsurface has shown two different situations. In still air, the two profiles follow an exponentiallaw and the thermal and the concentration layers lie within a few tens of millimetres. Inthe presence of turbulence, the thickness of these two layers is dramatically reduced. In still air, infront of a vertical, chilly surface, the deposition rate of air pollutants by thermophoresis and/orStefan flow is increased by 3 or 4 times in comparison with a horizontal surface. In the presence ofturbulence, the thickness of the thermal and concentration layers was dramatically reduced, makingthese two kinds of deposition much faster.  相似文献   

临安地区强酸雨的特点   总被引：3，自引：0，他引：3       下载免费PDF全文

洪盛茂 《大气科学》1997,21(1):31-38

本文对1985年至1994年监测的强酸雨资料进行研究和分析，并与一般酸雨进行对比。结果表明，本地的一般酸雨出现较为频繁；强酸雨出现增多；四季中强酸雨频率各不相同，秋季最高，夏季最低；强酸雨的酸沉降量正在逐年增加；强酸雨的电导率较高，电导率和pH间呈现高度显著的负相关；强酸雨的降水量一般较小，并与pH间显现非常显著的正相关；强酸雨中各离子浓度均高于一般酸雨。  相似文献   

辽东裂谷块状硫化物矿床中电气石岩的H、O和Si同位素地球化学   总被引：3，自引：0，他引：3  

夏学惠 《地球学报》1997,18(Z1):214-216

辽东裂谷内分布着一系列块状硫化物矿床，含矿建造及矿层内普遍发育有纹层状电气石岩。电气石岩的H、O和Si同位素地球化学研究表明，其中δD为-50‰—62‰，δ18O值为13.3‰—16.7‰，δSi为0.1‰—0.4‰。H、O同位素组成与典型块状硫化物矿床中的电气石岩完全一致。研究认为矿床中的电气石岩为海底热水沉积成因作用的产物。此类电气石央坏蛋硫化物矿床关系密切，具有明显的成因找矿指示意义。  相似文献   

黄河下游泥沙淤积的经验统计关系   总被引：4，自引：0，他引：4  

许炯心 《地理研究》1997,16(1):23-30

以黄河下游历年实测水文泥沙资料为基础,运用多元回归分析方法,建立了下游河道淤积量与淤积强度的经验统计关系。揭示了不同粒径组泥沙的来量和它们在全沙中所占的比率对下游河道淤积特征的影响。同时,研究了高含沙洪水及清水基流对下游河道淤积的影响。  相似文献   

河流深槽沉积体与油气的关系——以辽河坳陷大25井区为例     

陈振岩  李军生  闫火  张戈  祝丽玲  陈峰  季东民 《沉积学报》1996,(3)

河流深槽沉积体是河流沉积的一种特殊沉积体。辽河坳陷第三纪断裂活动强烈，火山岩广泛分布，形成了独特的地貌条件，具备形成河流深槽沉积体的地质条件。本文以辽河坳陷东部凹陷大２５井区为例，对河流深槽沉积体的成因及特征进行探讨，证实了大２５井区巨厚砂砾岩沉积是河流在火山岩古地形的限制下发生急转弯，在其变曲河段的深槽中沉积的深槽沉积体。该沉积体中发育良好的储集空间，有利于油气储集。该类储集体的发现，丰富了辽河坳陷的储层类型，为油气勘探提供了新的领域。  相似文献   

CuInSe2太阳电池薄膜的制备技术及研究进展     

孙小玲  马鸿文 《地质科技情报》1996,15(3):99-104

着重介绍了CuInSe2的结构和光、电学特性；讨论了多各上薄膜沉积技术；评价了主要的合成装置及其作途；综述了制备CuInSe2太阳电池器件的工艺和材料，提出了一种能成功地生产大面积太阳电池薄膜的经济有铲的沉积技术。  相似文献   

华北地台南缘中元古代官道口群热水沉积硅质岩的地球化学特征   总被引：5，自引：0，他引：5       下载免费PDF全文

魏俊浩  王思源  吕国芳  潘振祥  马旭东 《地球科学》1996,(1)

在简要介绍了硅质岩基本地质特征的基础上，详细讨论了该套硅质岩的常量元素、微量元素以及氧同位素化学成分及组成．研究表明，该套硅质岩富集了与热水成因有关的Ａｇ、Ａｓ、Ｃｒ、Ｐｂ、Ｚｎ、Ｃｕ、Ｂ、Ｓｂ等微量元素和ＣａＯ、ＦｅＯ、Ｆｅ２Ｏ３等氧化物中常量元素，贫化了ＴｉＯ２、Ａｌ２Ｏ３、ＭｎＯ等氧化物中的常量元素．氧同位素组成及利用氧同位素估算的硅质岩的形成温度，均反映了热水沉积成因的特点  相似文献   

鄂尔多斯西南缘前陆盆地沉降和沉积过程模拟   总被引：17，自引：8，他引：17  

刘少峰  李思田 《地质学报》1996,70(1):12-22

本文将东祁东逆冲带与鄂尔多斯西南缘晚三叠世前陆盆地相结合，研究了逆冲带内部变形特征，前陆盆地中层序地层格架特征及其反映的盆缘构造性质和幕式逆作作用。  相似文献   

Streambank fish-shelter structures help stabilize tributary streams in Wisconsin     

Stanley W. Trimble 《Environmental Geology》1997,32(3):230-234

 A significant proportion of stream sediment yield in North America comes from stream channel and bank erosion. One method used for stream stabilization is the bank installation of timber and stone fish-shelter structures, but there is little evidence for their potential effectiveness. Nine to nineteen years of precise survey data from Coon Creek, Wisconsin, however, show that fish structures enhance sediment deposition along the stream and may retard lateral migration of channels. Such structures have greater utility for sediment control when streams are eroding away a high bank and replacing it with a lower bank. Received: 18 October 1996 · Accepted: 4 February 1997  相似文献