查询词典 low clouds

Thirdly, The mathematics model of forecasting low flow was established in Fengcong and Fenglin regions according to these factors influencing the amount of low flow in karst drainage (the area of drainage, lithology, the type of landforms and its special assembly and forest)The conception of low water resources carrying capacity was firstput forward according to the changing law of low water resources in space and the situation of exploitation and utilization in karst drainage (ie, under the condition of the virtuous ecological environment and the available technology, the explorable amount of water resources in certain areas is capacity and limitation which is able to coordinate the development of population, enviroment and economy during the period of low flow seasons) and preliminarily analyzed its connotation, characteristic and established the index system of low flow in karst drainage.

根据喀斯特流域枯水资源的空间变化规律以及实际开发利用状况，首次提出了枯水资源承载力的概念，即在枯水季节期间，保持良性的生态环境和现有的技术条件下，某一区域内可开采的水资源量对支持该地区人口、经济与环境协调发展的能力和限度。

Design the structure of high performance Low-E film including its material and thickness of every layer according to basic optical theory. Carry out an innovative work to calculate its optical performance by characteristic matrices and optical admittance. Compare the results with those we get by traditional measurement.3. Prepare Low-E films with RF magnetron controlled reactive sputtering. The result shows that in the visible region (380nm-780nm), the highest transmittance is 82.4% while the average value is 75%. In the NIR region (780nm-2500nm), the average transmittance is 16.2%. These characters can fit the demand of the glass used in architecture and cars, and also in other applications.4. We novelly use the material Titanium as protective layer to solve the problem that Ag layer would disappear when depositing the second TiO_2 layer. As the protective layer, Ti does not increase the number of targets so as to lower the costs. The thickness of the protective layer Titanium is adjusted by controlling of sputtering time. Results shows the Low-E films get the best optical character when the sputtering time of Titanium is 20 seconds5. We novelly proposed a new transmittance quality factor Q=_·(?_-__ to evaluate the performances of Low-E films, which makes it easier to judge the qualities of Low-E film.6. The photocatalysis of Titanium dioxides is researched and introduced into Low-E films. Sb-doped TiO_2 thin films are prepared. Its photocatalysis and hydrophilicity are measured.

论文的工作主要有：1、总结了低辐射薄膜的制备方法，性能，以及国内外最新研究进展和应用，并对两种类型的低辐射薄膜进行了比较。2、从光学基本理论开始，设计了离线低辐射薄膜的结构，包括每一层的材料和厚度，并创新性的用特性矩阵和光学导纳理论计算了该离线膜的光学性能，利用软件对其进行了仿真，与实际制备的薄膜所测量的性能相比较。3、完成在实验室仪器上制备低辐射薄膜，掌握其工艺条件，解决了超薄金属膜的制备问题，所制备的低辐射薄膜在可见光区(380hm-780hm)最高可达82.4%，平均透射率为75%；在近红外区(780nm-2500nm)的平均透射率为16.2%，其性能达到建筑物幕墙玻璃，汽车前挡玻璃等应用标准，并为进一步的大规模生产打下基础。4、针对中间银层在镀上层膜时易被氧化这一工艺难题，本研究创新性的提出用Ti膜作为保护膜，没有增加新的靶材，提高了生产效率，并节约了生产成本。

At the super-low permeable reservior sandstone of Fu and Yang in Daqing Oilfield, many pore throats exist a lot in the types of compacted and restored flakes and curved lamellas while the pore volume of micropore and the thin, compacted and shrunken throat that contribute little to flow take large scale in the total pore space. Thereof high filtrational resistance is caused by much trouble including high content of reservoir shale, serious sensibility to pressure at waterflooding, remarkable effects of undersaturation and water blocks in micropore. A method with laboratory experiment, theoretical confirmation and field application included was adopted to analyze the non-linear flow characteristics, to reveal the deep mechanism of pinhole enveloping macropore and to provide a new technology of improving the development effect. The outcomes aquired are as follows: Multiple cores with different low and super-low permeability were selected to perform seepage experiments by gas, water and oil. Three fields of flow were observed in the reservoir at different low and super-low core permeability. They are pseudo- elastic flow, transition flow and plastic creep flow. So the concept that there was no correlation of rocky absolute permeability with fluid properties that pasted itself was broken up. Two-phase seepage of water displacing oil in uniform super-low permeability shows that the two-phase seepage zone is narrow.

针对大庆油田扶、杨特低渗透油层砂岩孔隙喉道的大小和形态以压实再生型片状、弯片状喉道分布较广，压实、缩小型细喉道型，微孔不可流动的孔隙体积所占总孔隙体积的比例较大的特点；及储层泥质含量高，注水开发中压力敏感性强、微孔隙欠饱和及水锁效应显著，导致流体渗流阻力增大的问题，本文采用室内实验、理论推证和矿场应用相结合的方法，研究、分析了流体非线性渗流特征，更深刻地揭示出小孔包围大孔的机理及产生原因，并提供了改善开发效果的新的技术方法，取得如下成果：选择不同渗透率的低渗透、特低渗透岩心，进行了气、水和油单相渗流实验，揭示出当岩心渗透率不同时，油层内的流体呈现出拟弹性流变、过渡流变、塑性蠕变三种流变区，从而打破了岩心的绝对渗透率与通过岩心流体性质无关的观点；同类特低渗透岩心的水驱油两相渗流实验表明，两相渗流区较窄。

A typical case of polar low occurred on 26 February 1996 over the Sea of Japan is investigated. The analysis exhibits the spatial structures at different stage of this polar low event. At the initial stage of the polar low, the largescale environmental condition is characterized by a strong baroclinic zone in the low-level (below 700 hPa). The upper-level environmental circulation is almost barotropic. At the mature stage, a high IPV anomaly is situated over the surface polar low and a shallow layer of instability overtops the polar low center.

通过对1996年2月26日发生在日本海上的一个典型的极地低压个例的分析，揭示了极地低压在不同阶段的空间结构：在初始阶段，低层（700hPa以下）的大尺度环流场具有明显的斜压结构，而上层环流场基本上是正压的；在成熟阶段，极地低压的地面中心的上方IPV具有正异常，极地低压地面中心之上有一个浅的不稳定层。

Based on the above cases, aiming at the actuality and practical cases of low-resistivity oil/gas reservoir log interpretation and evaluation in this thesis, beginning with analysing the intrinsic characteristics and physical properties of low-resistivity oil/gas reservoirs, all kinds of formation origin and mechanism of low-resistivity oil/gas reservoirs are analysed systematically and a great many of examples are given. Then the low-resistivity oil/gas reservoirs are classified by their formation origin. By setting up all kinds of interpretation models of low-resistivity oil/gas reservoirs, discussing and studying the low-resistivity oil/gas reservoir interpretaion and prediction methods, a set of practicable and systematic well logging interpretation and evaluation methods is obtained.

鉴于此，本文针对低电阻率油气储集层测井解释和评价的现状与实际情况，从认真分析低电阻率油气储集层的基本地质特征和物理性质着手，系统地分析了低电阻率油气储集层的各种成因和机理，并例举了大量实例，在此基础之上，对低电阻率油气储集层进行了科学的成因分类，建立了各种低电阻率油气储集层的解释模型，并对低电阻率油气储集层的测井精细解释与评价预测方法作了深入的探讨和研究，形成了一套较为实用的低电阻率油气储集层测井精细解释与评价方法系统。

Such low-level clouds, called stratus clouds, occur below 6,500 feet (2,000 meters) and often bring rain or snow.

这样低水平云层，被叫做层云云，发生在6500英尺（2000米）的下面和经常带来雨或雪。

In this low ground about Borodino in the mist, and above it, and especially along the whole line to the left, in the copses, in the meadows below, and on the tops of the heights, clouds of smoke were incessantly springing out of nothing, now singly, now several at once, then at longer intervals, then in rapid succession. These clouds of smoke, puffing, rolling, melting into one another, and sundering apart, trailed all across the wide plain.

在雾气腾腾的波罗底诺附近的洼地上，以及在它以外的高地上，特别是在战线的左方，在树林、田野、洼地、高地的顶端，仿佛无中生有似的不断地腾起大炮的团团浓烟，有时单个出现，有时成群出现；时而稀疏，时而稠密，这一带到处可以看见烟团膨胀开来，茂盛起来，汹涌滚动，混成一片。

Such low-level clouds, called stratus clouds, occur below 6,500 feet (2,000 meters) and often bring rain or snow.

这种低层次的云，命名：&层云云&，出现在6500英尺（ 2000米）之下，而且往往带来雨或雪。

Such low-level clouds, called stratus clouds, occur below 6,500 feet (2,000 meters) and often bring rain or snow.

这种低层次的云，气象学称：《层云》云，出现在下面6500英尺（ 2000米），而且往往带来雨或雪。

Such low-level clouds, called stratus clouds, occur below 6,500 feet (2,000 meters) and often bring rain or snow.

这样低水平面的云，叫做&层云&，出现在2000米以下并且通常带来雨或雪。

Hanna: That's over now, isn't it?

都结束了，对吗

You must be ill. You look so pale.

你一定是病了，你的脸色苍白。