降水

The result shows that Ritz finite element method is suitable for deep excavation dewatering calculation, and Galerkin finite element method maybe put into practice after well system is simplified.

比较分析结果可知，本文运用的里茨有限元法适用于深基坑降水计算，而运用迦辽金有限元法需对井点进行处理，才能用于实际计算。

The development of saprolite is realized by the progressive propagation of the weathering front of low permeable rock blocks, and the condensate from the moisture and the unsaturated seepage flow are the key agents of the propagation process.

腐岩发育是通过低渗透岩石结构体风化前锋的渐进性扩展实现的，非饱和带高湿度空气形成的凝结水和降水入渗形成的非饱和渗流是该过程的核心动力。

In this thesis, the problems, involving in the design and practice of seepage on foundation excavation, are studied systematically.

本文针对目前深基坑降水设计理论和实践中有关渗流方面存在的问题进行了较系统的研究。

The rainstorm process is a complex and stochastic multi-dimensional process.A correlation exists between the maximal annual period-storm and the rainfall duration,with overlooking many factors,the parameterwill not be a constant.Since 1980s,heavy rain and flood of small basins can be calculated by auto-recording rainfall observation system,and 20-year's self-recording rainfall data can improve the calculation accuraey.

暴雨过程是一个复杂的多维随机过程，年最大时段暴雨xt，p与暴雨历时t的暴雨公式属于经验相关关系，忽略了不少影响因素，因此，公式中参数n值不会是稳定不变的。20世纪80年代以后，随着自记雨量观测应用，到目前已经有20多年的资料系列，小流域暴雨设计的计算就可以直接利用时段实测降水资料系列进行计算，设计洪水时，可根据实测雨量时段资料，计算该设计流域的n值，可提高计算精度。

This technique proves suitable to semiarid areas for the purpose of increasing rainwater use efficiency.

该技术是适合于半干旱地区的一种能较好提高降水利用率的种植方式。

The location variation of arid and semiarid boundaries is closely related to regional warming and precipitation reduction.

干旱和半干旱分界线的位置变化与区域升温和降水减少密切相关。

The relationship of ore-forming fluid salinity-aqueous cation lg demonstrated that water-rock reaction was also one of the potential gold deposition mechanisms besides mixing with meteoric water. All of these were consistent with that sericitization and pyritization hydrothermal alteration were extensively/intensively distributed (as high as 33%), gold grade linearly correlated with degree of alteration,∑REE depletion and δ〓O enrichment

成矿流体盐度-液相主要阳离子组分1g演化规律研究表明，除与大气降水的混合-稀释外，水-岩相互作用也可能是造成金沉淀的重要因素，这与本文所研究金矿床中绢云母化、黄铁矿化等热液蚀变广泛发育(可高达33％)，Au品位与热液蚀变程度、REE亏损量及δ〓O富集规模表现出较为明显的线性关系等一系列地质事实相吻合

Surface erosion occurs mainly in farmland, sparse grassland and woodland, is the rainfall and runoff erosion on the surface is relatively uniform, including the raindrop erosion, sheet erosion and rill erosion .

面蚀主要发生在坡耕地、稀疏牧草地和林地，是降水和径流对地表相对均匀的侵蚀方式，包括雨滴侵蚀、片蚀和细沟侵蚀。

Results The result show that the coupling scheme 1 to the coupling scheme 3 has the better effect on the short-range forecast of the heavy rain, and the coupling scheme 1 is the best one.

结果主要雨带位置对参数化方案并不是十分敏感，但模拟的暴雨中心强度、范围、雨带走向随参数化方案的不同有较大变化，甚至出现虚假的强降水中心。

A method of quantitative precipitation forecasts for short-range ensemble forecast is presented aiming at inability of ensemble average method to extreme weather event.

摘要针对短期集合预报中集合平均等方法对极端天气事件预报能力低下的缺陷，提出一种定量降水预报集合方法，简称两步法。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐