查询词典 erosion

The equivalenceof the adjunction for the grey-scale morphological dilation and erosion, and for thefuzzy conjunction and implication has been proved. A series of properties ofgery-scale morphological operators are discussed.

证明了灰度形态学膨胀和腐蚀算子之间的伴随关系与模糊逻辑合取和蕴涵算子之间的伴随关系的等价性。

The underground root systems and the plenty of adventive roots growing on basis trucks can greatly reduce soil erosion by reservoir water. The 1 m×1.5 m allocation density of the Salix viminalis showed the best protection, and sediment yield was 8.64 kg/m^2, which decreased 74.38% compared to CK.

柳树根系及主干基部长出的大量不定根，可减缓水库水流对滩地土层的冲蚀，以青刚柳1m×1.5m密度配置的防护效果最好，冲蚀量仅8.64kg/平方公尺，比对照减少74.38%。

Soil erosion is one of the most important ecological environment problems in our country, which results in land resource destroy, soil degradation, land productivity decrease, water pollution, river and water storage works aggradation, flood, avalanche, mudrock flow and menace to the life and wealth of people, and so on.

土壤侵蚀问题是目前我国面临的主要生态环境问题之一，严重的水土流失不仅破坏土地资源、降低土壤肥力、制约粮食生产增长，还污染水环境、淤积河道和蓄水工程，导致洪水、崩塌和泥石流等灾害频繁发生、威胁人民的生命财产等。

Then it defines that thebackground value of soil erosion of the middle Yellow River is 650-1000 millon tons/year according to thetwo-way calculation results of aggradation volume of the river alluvial fan and sediment deposition volumeof the ancient river mouth, after comprehensive consideration and under the conditions of less...

然后根据由黄河冲积扇的堆积量和古黄河口泥沙淤积量两种途径的推估结果，经综合考虑后认为，在历史上人类活动较小情况下，黄河中游土壤侵蚀的自然背景值为每年6.5～10亿t。

To improve the purple soil storage capacity, to prevent soil erosion in hunan province, the choice of HengYangXian 20o purple soil slope, setting Guan waste land, grassland, natural forest and grassland and agrimony slight composite 4 processing, the water treatment performance and its mechanism, and the results show that, compared to the purple soil LuoDe HuangShanPo ground implement agrimony and three-dimensional planting trees for 1-2 years later, reduce soil bulk density 0.10 g/cm3 0.09 ~, soil porosity, permeability of soil moisture 14.01% increase rate increase 2.20 ~ 2.29 times.

为提高紫色土蓄水能力，防止水土流失，在湖南省衡阳县选择20o 左右的紫色土荒山坡地，设置祼地、自然草地、龙须草地和龙须草与林地复合4 个处理，比较分析各处理贮水性能及其改良机理。结果表明，与裸地相比，在紫色土荒山坡地上实行龙须草与林木立体种植1～2 年后，土壤容重降低0.09～0.10g/cm3，土壤总孔隙度增加14.01%，土壤水分渗透速率提高2.20～2.29 倍。

The Implementation Regulations specifically provide that fixed assets qualified for accelerated depreciation allowance include:(1) fixed assets fast becoming obsolete; and (2) fixed assets in a state of vibration and being exposed to high degree of erosion.

实施条例据此明确，可以享受这一优惠的固定资产包括：由於技术进步，产品更新换代较快的固定资产；常年处於强震动、高腐蚀状态的固定资产。

The evolution history of the volcanic rocks goes through five stages, the forming stage, the weathering and leaching stage, the burial and tectonic\|reforming stage, the erosion stage and the oil and gas accumulation stage. Finally, the model of porosity evolution was set up with andesite and basalt as examples.

在上述研究的基础上，将火山岩储集空间的演化过程分为火山岩的形成阶段、风化剥蚀淋滤阶段、埋藏和构造作用阶段、溶蚀改造作用阶段和油气聚集成藏阶段5个阶段，并以安山岩和玄武岩为例，建立了火山岩储层的孔隙演化模式。

The CFD method was applied to calculate and simulate the form and action process of the cavitation at the representative character of the cavitation erosion on the surface of the hydraulic turbines.Some argumentation was presented that micro jet impacted the wall with a certain degree when bubble collapsed with the result that the maximal strain of the wall annularly distributed the local of the boundary touching the micro jet.Cavitation was gradual to develop regionally at the mode of chain reaction and di...

针对水轮机叶片表面气蚀的典型特征，利用CFD方法进行仿真计算，模拟气蚀形成和作用过程；根据模拟计算结果提出了新观点：空泡溃灭发生微射流以一定的倾角冲击壁面，壁面材料产生的最大应变在流束边界局部区域，呈环状分布；空泡气蚀在局部区域是渐进的，以"连锁反应"形式扩展，具有一定过流环境的分布特征；典型的冲蚀缺陷形貌是空泡气蚀在不同阶段的产物。

China continues to lose arable land because of erosion and economic development.

中国继续失去耕地由于水土流失和经济发展。

In order to provide the visual information for synthetical management of water and soil conservation, this research hotlinks the attribute of terrain and vegetation to transportation area and sedimentation area through graph database、 erosion database and GIS.

为了给水土保持部门综合治理提供可视化信息，本研究通过建立图形数据库、侵蚀量数据库，借助地理信息系统（ArcView 3.2）将实际地形及植被等属性与侵蚀量的沉积区、搬移区域图形斑块进行热链接。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。