您要查找的是不是：
- evolution trend of river bed 河床演变趋势
- On the basis of the hydrologic data from 1981 to 2001, the evolution of river bed at Lanzhou section of the Yellow River was analyzed. 基于1981-2001年水文数据,分析了黄河兰州段河床演变规律;
- Based on model test and the scene investigation, the flow structure around submerged spur dikes and evolution characteristic of river bed are researched . 根据水工模型试验研究和工程现场考察，对漫水丁坝附近的水流结构，河床变形的特点进行了分析和研究；
- It shows that clearly the evolution trend of the quality of the quality of gasoline and diesel oil,the principle of exploiting and the evolution for clean fuels productive technology. 简要介绍了汽油、柴油质量发展趋势和清洁燃料生产技术开发应用的原则,以及清洁汽油、柴油生产技术的新进展。
- Analysis of river bed evolution and prediction of its trend for Shashi Section in middle reach of the Changjiang River 长江中游沙市河段河床演变分析及趋势预测
- The dam is RCC dam.The pouring layers are slanting in the RCC construction of river bed dam section. 拦河坝为全断面碾压混凝土，河床坝段的碾压混凝土采用斜层平推铺筑法施工；
- The orthogonal analyses show that level length in bucket and the anti-erosion power of river bed are important factors for controlling scour hole depth. 文中对冲刷坑水深计算式采用正交分析计算表明,戽内水平长度与河床抗冲能力是控制冲刷坑水深的主要因素,在应用时需过细论证,才可获得满意的防冲效果。
- The chart shows an up trend of meat prices. 图表显示肉价呈上升趋势。
- A two-dimensional sediment mathematical model is applied to the calculation of river bed deformation of sluicing silt in Qingyanzi reach after three Gorges reservoir is built. 本文应用平面二维泥沙数学模型对三峡工程青岩子河段建库后的河床冲淤变化进行了初步计算。
- The trend of prices is still upwards. 物价仍有上涨趋势。
- From the angle of phylogeny, the evolutionary trend of tracheidlength was from long to short, so P. armand was primitive. 从系统演化的角度上看,管胞在长度方面的进化趋势是由长逐渐变短。
- The biosystematic relationships of the three genera are corroborated by the evolutionary trend of trispikelet in the external morphology. 三柄麦属、芒麦草属和新麦草属的这一系统关系同它们外部形态上三联小穗的演化趋势是相互印证的。
- Risk Assessment of River Bed Evolution in Bridge Engineering 桥梁工程中河床演变的风险评估
- Probing into the motif of Shui Hu drama helps us to apprehend the evolutive trend of the thought of producing literature under the times influence. 通过对水浒戏主题转变的深入探讨有助于我们了解在时代的影响下文艺创作思想的发展趋势。
- The trend of river water quality models(RWQMs) developed from certainty to uncertainty was defined,and it was pointed out that the most of existing RWQMs are based on the Fick's law of diffusion. 明确了河流水质模型由确定性向不确定性发展的趋势,指出现有河流水质模型大多建立在菲克扩散定律基础上。
- The stomata apparatuses were predominantly anomocytic and the evolutionary trend of the stomata1 apparatuses was from diacytic type and paracytic type to anomocytic type. 该科植物气孔器以无规则为主，且气孔器由横列型、平列型向无规则型方向进化；
- It is believed that the great turbulent energy at low Froude numbers acting on the downstream river bed is the main cause of the erosion The length of river bed to be protected downstream of a stilling basin is recommended. 认为较大紊动能的频繁作用是造成下游河床冲刷破坏的主要因素,并提出消力池下游最需要保护的河段长度。
- Use characteristic and its evolution trend of Russian title 俄语称谓的特点及其演变趋势
- The trend of stock is still downwards. 股票的走势还是下跌。
- Evolution and New Tectonic Movement of River Bed of the Lower Huanghe River 黄河下游河床变迁与新构造运动
