查询词典 sand-fish

Parameters of movement process of saltating sand grains The thesis studies some motion parameters of saltating sand grains by using wind tunnel experiment and computer simulation.

沙粒跃移运动参数利用风洞实验与计算机数值模拟技术，研究了跃移沙粒运动参数。

It would also help to obtain integrity trajectories of saltating sand grains by extending bitty saltating trajectories grained from wind tunnel experiment in order to understand deep sand grain saltating motion.

这项研究为跃移沙粒运动参数分布函数研究提供了一条新思路，有助于将风洞实验获得的沙粒跃移运动的片断轨迹拓展，进而获得沙粒跃移运动的整个轨迹，以便深入理解沙粒跃移运动。

Firstly, saltating sand grains in various height layers mostly rotate clockwise; the rate of counterclockwise rotation changes from 16.7 to 33.3% for three different friction wind speed (u*= 0.67, 0.83, and 0.87 m/s). However, their mean rotational speeds were not significantly different, irrespective of whether the grains rotated clockwise or counterclockwise. The mean counterclockwise rotational speeds of sand grains for friction wind speed u*= 0.67, 0.83, and 0.87 m/s were 427, 519, and 604 rev/s, versus 429, 522, and 609 rev/s, respectively, in the clockwise direction.

首先，风沙流中各高度层内跃移沙粒旋转均以顺时针方向为主，逆时针方向旋转的沙粒数仅占总数的16.7-29.5%，但是无论逆时针还是顺时针旋转的沙粒，它们的平均旋转速度几乎没有差别(如u*＝0.67 m/s时，分别为427 rev/s和429 rev/s；u*＝0.83 m/s，分别为519 rev/s和522 rev/s；u*＝0.87 m/s，分别为604 rev/s和609 rev/s)；不同摩阻风速条件下各高度层内沙粒的旋转速度均服从Lorentzian分布。

The bottom is covered with a layer of violet quartz sand on which saggers stand with Majiao half in the sand.

10窑床：为全窑的底衬，与水平线成约3°角，并铺一层紫石英砂，匣钵立于其上，码脚半截入砂，能起到稳定匣柱的作用。

There are generally 3 types of sand production: the output of inorganic profile control agent in Mongolia Oilfield (grain size between 0.05 and 3 mm); the output of cement paste with formation debris (grain size between 0.03 and 8mm) in Xilin Oilfield caused by casing failure; and the output of loose sand grains in Hanan Oilfield and Anan Oilfield.

这些出砂没有形成规模，只出现在个别的井组和单井。因此本着少投入，多产出的原则，对国内的机械防砂和化学防砂技术进行了对比，取其长处，形成了适合二连油田的筛管悬挂式防砂工艺、简易防砂管柱技术和防砂泵防砂3项技术。

In control of sand, soil and peat content in rootzone, this research try to study the effect of different sand/soil ratio and peat content on soil physical properties and turfgrass growth.

论文从运动场草坪根系层土壤基本组成出发，研究不同配比土壤物理特性变化规律以及对草坪草生长的影响，为我国运动场草坪场地建造提供理论支持。

BP-1 Pen-Shaped Sand Blaster The sand blaster features double-pen operation,i.e.,one for fine process and the other for coares process,to remove oxideskin and other impurities from surface of small casts.

该机为双笔操作，粗细各异用于清除微小铸件的表面氧化物及其他杂物，同时还可用玻璃珠对塑料基托表面进行抛光处理。

Placers - There are two types of placers; rich placers which are groups of stones that are found in gravel, sand, river sediment, and valley floors, and loose weather resistant placers that are found in sand, clay, gravel, and rubble.

砂矿-有两种类型的砂矿；丰富的砂矿是群体的石头被发现在砾石，沙子，河流沉积物和谷地，气候和松散性砂矿被发现在沙子，泥土，碎石和瓦砾。

Placers - There are two types of placers; rich placers which are groups of stones that are found in gravel, sand, river sediment, and valley floors, and loose weather resistant placers that are found in sand, clay, gravel, and rubble.

砂矿-有两种类型的砂矿，这些都是是在砾石，沙子，河流泥沙石块组发现丰富的砂矿和谷地，气候和松散性砂矿被发现在沙子，泥土，碎石和瓦砾。

According to the different appearance, can be divided into Grass Valley, or sand used as a beautiful sand, pot-shaped bunkers, etc ...

根据模样的不同，又可分成草坑、用做美观或沙面沙坑、壶形沙坑等。。。

Nowadays, most of research are to build a transmutative Petri Nets through adding controlling place sets, controlling arc sets and controlling policy to the basic Petri Nets, while the Controlled Petri Nets could be used to argue many controlling theory problems conveniently and to induce many logically and physically supervisory and solve the Event Feedback Controlling Problems and State Feedback Controlling Problem in DEDS supervisory theory.

目前大多数的研究表现为在变形后的受控Petri网基础上，利用各种方法求得各种逻辑型、结构型控制器，解决DEDS监控理论中的事件反馈控制问题与状态反馈控制问题。

On one hand, there are discussions with the works council and union about extension of short time working up to the end of September.

一方面，有讨论，工程理事会和联盟关于延长工作时间短至9月底。