查询词典 sand-blind

Firstly, based on the force acting on a single-particle, establish a discriminant formula of the sand threshold, and prove that the sand threshold belongs to the cusp catastrophe. Then establish the basic equation of the cusp catastrophe using coordinate transformation and catastrophe theory. Finally, while particle Reynold number and equivalend diameter are the state variables and Shields parameter is the control variables, we can obtain the model of cusp catastrophe of sand threshold, putting those variables into the basic equations of the cusp catastrophe. The model is derived from the mathematics, which has a certain mathematical theory foundation.

首先从单颗沙粒受力分析出发，建立沙床沙粒起动条件判别公式，进而证明了风沙起动属于尖点型突变；然后通过坐标变换和突变理论建立了尖点突变的基本方程；最后本文选择颗粒雷诺数和等效粒径作为控制变量，希尔兹参数作为状态变量，并把它们代入尖点突变的基本方程，经过拓扑变换得到风沙起动的尖点突变模型，并与前人的公式及实验数据进行比较。

Sand belt, sand paper and abrasive product, diamond sand wheel, Pitch cutting, Black lead cloth, etc.

砂带、砂纸及及其异型产品，石墨布、树脂、陶瓷砂轮、树脂切割片、金刚石砂轮等。

Wind erosion in the region, should be taken to the development of water resources, water Lassa, planting trees and grass, set up artificial sand barrier and the Green Belt Network, and other measures to establish a sand-fixing system of protection and control against the sand.

在风力侵蚀地区，应当采取开发水源、引水拉沙、植树种草、设置人工沙障和网格林带等措施，建立防风固沙防护体系，控制风沙危害。

Major producers of clay sand casting, resin sand, silicate sand and vacuum form complete sets of equipment.

主要生产铸造粘土砂、树脂砂、水玻璃砂及负压造型成套设备。

The total microbial numbers in fixed sand were 2.8 and 12.5 times as many as those in semi-fixed sand and in sand-flowing dune,respectively.

土壤微生物，在风沙土的发生、土壤肥力的形成和发展、营养元素的转化中起着不可替代的作用[1]。

Natural sand and gravel is plentiful in our country, but in most time it is used in sub-base. In order to make use of the resource and control the cost, The paper introduced lime-ash fly stabilized sand and gravel and cement stabilized sand and gravel which are used in base of second road asphalt pavement.

我国天然砂砾蕴藏丰富，但多用于底基层和垫层，为充分利用资源、控制成本，本文对天然砂砾在二级公路沥青路面二灰砂砾和水泥稳定砂砾基层的应用进行了研究。

By now in the hopper sand how many changed to the draft control, when the advance must examine that in fights sand how many to decide, the advance backlash must be flexible, when the sand bed landslide mechanical work strenuous or does not draw wants the hauling rope to loosen, causes the ship to draw back backward, up to until digs moves.

这时料斗内沙子的多少改用牵引控制，前进时要查看斗内沙子的多少而定，前进后退要灵活，如遇沙层塌方机械工作吃力或拉不动时要牵引绳松开，使船向后退，直至挖动为止。

Northeast because of following the sea strong breeze function, the sand ground is most the breadth to amount to 2030 kilometers of －s, some sand dikes with a few place be juxtaposed, becoming one lagoon plain of special sand dike.

东北部由于沿海强风作用，沙地最宽达20－30公里，有些地方几条沙堤并列，形成特殊的沙堤一泻湖平原。

Northeast because of following the sea strong breeze function, the sand ground is most the breadth to amount to2030 kilometers of－ s, some sand dikes with a few place be juxtaposed, becoming one lagoon plain of special sand dike.

海南岛东北部由于沿海强风作用，沙地最宽达20－0公里，有些地方几条沙堤并列，形成特殊的沙堤一泻湖平原。

The result shows that the disturbances enhance the movement of sand, so that the incipient velocity of local sand will lower than that on the flat river bed and lead to instability of river bed and sand ripple consequently.

实验发现，扰动附近水流紊动大大增强，扰动促使局部泥沙在断面平均流速低于平床起动流速的情况下起动，并促使床面失稳形成沙纹。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。