查询词典 sedimentation

The influence of sedimentation on overburden pressure and settlement of layered soil is studied and the relevant formulas are developed.

研究了沉积作用对成层地基自重应力与沉降的影响，给出了相应的计算公式，并对几种情况下的计算结果进行了分析比较。

Industries as a result of the history of the Yellow River water sedimentation, blockage, breach, diversions, such as changes in his role, Puyang formed inside the two major Yellow OXBOW.

由于历史上黄河水沉积、淤塞、决口、改道等变故作用，濮阳境内形成了两条大的黄河故道。

Based on modern optimization theory and optimal control theory, this dissertation studies some questions as follows:1. The optimization model of parameter identification of three-dimensional geologic history numerical simulation, algorithm and its applicationGeologic history numerical simulation is a basic content of basin numerical simulation, and the porosity is the major parameter in the evolution and development process of oil-bearing basin. According to the sedimentation and burial mechanism, the physical and chemical principles of oil geology, the mudstone porositys non-linear parabolic partial differential equation has been established.

本文应用现代最优化及最优控制理论，对如下一些问题进行了研究： 1、三维地史数值模拟的参数辨识优化模型、算法及应用地史模拟是盆地数值模拟的一个基础性的研究内容，地层孔隙度是含油气盆地地史演化发育过程中的重要参数，根据地层沉积埋藏机理和石油地质的物理化学原理，通过引入数学物理方程概念，建立了泥岩三维孔隙度场方程，根据问题的特点，给出了方程的定解条件，对方程的动边界也给出了处理方法，并且证明了解的存在性与惟一性，在此基础上建立了以当今实测数据为拟合准则的三维地史数值模拟的参数辨识优化模型，这是一个含有二阶偏微分方程约束的泛函极值问题。

The result suggests that wheat from the regional trial of Sichuan province have a wide range of the pentosan content, but a little lower SDS sedimentation value.

结果表明，各参试材料间的戊聚糖含量差距较大，SDS沉降值偏低，戊聚糖含量与SDS值并无直接的相关性。

The Phanerozoic glauconites in this study show that they were formed in an environment of weak reduction and low sedimentation.

显生宙的海绿石，多年来研究的结果表明海绿石发育在慢速弱还原环境。

Microbial sedimentation was widespread in the Precambrian and was also developed in stromatolitic carbonate horizons of the Phanerozoic, which constitute one type of microbial carbonates.

微生物沉积作用在前寒武纪地层中普遍发育，在显生宙的一些地层中也较为发育。

Such sedimentation followed a 20~25 Ma-long period of Tiaojishan/Lanqi volcanism and was accompanied by plutonic emplacement (ca.158~141 Ma) in some Yanshan areas.

土城子组/后城组的沉积是紧随着在燕山部分地区发生的，持续了20~25Ma的髫髻山组/蓝旗组火山及岩浆活动。

There is a symmetric sedimentary rhythm with a polyhalite center in this deposit,formed by the cogenetic metasomasis of relic concentrate d brine with gypsum in shallow basin of the gypsum flat environment above tidal level and the evaporation sedimentation of the mixture of gypsum flat drainage water with rilic concentrate brine.

矿床具有以杂卤石矿为中心的对称沉积韵律，一方面是潮上膏坪环境浅水盆地中的残余浓缩卤水与石膏发生同生交代作用形成，另一方面又是膏坪汇流水与残余浓缩卤水混合蒸发沉积而成。

B. Exactly, different mineral element compose different ceramic raw materials and most of porcelain clay are the products of weathering and sedimentation.

正是这样，不同的矿物元素构成不同的陶瓷原料，大部份瓷土是风化和侵蚀后的产物。

Therefore, there is a period of precipitation, sedimentation down.

因此，有一段降水，沉淀下来。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。