The decreased threshold shear velocity and unsaturated sand flows at the stoss slope of the dunes resulted the erosion at the toe of the dune. Under the medium and low drifting-sand winds the sands being transported have divergence with that on the surface, the mean grain size of transported sands is lower than that on the surface and the sand transporting is a stochastic process.
起动剪切速度减小与不饱和风沙流是沙物质在横向沙丘迎风坡坡脚不能产生沉积的主要原因；再者，平均风速并不能完全反映野外实际状态下气流的性质，在低－中强度的风沙活动过程中，被输送的沙物质的粒度组成与下垫面物质有明显的差异。
Natural gas; gas hydrate; seismic response; velocity; identification; South China Sea; north; continental slope
天然气；水合物；地震响应；速度；识别；南海；北；大陆坡
Emphasis has been attached to the characteristics of Sea-closure Engineering as well as the experience and theory, which have been accumulated in the practice of Sea-closure Engineering. Based on the summary of previous studies, hydraulic calculation on crevasse has been extended, with the regard of the theory of Bernoulli equation on the real fluid of total fluid, to realize the combined calculation of crest current velocity and the slope current velocity of cut-off dike. Related theories of systematic emulation have been applied to set up the model of emulation calculating system of reclaim crevasse.
在总结前人研究成果的基础上，结合实际流体总流伯努利方程的计算理论，对堵口水力计算进行了扩展和延伸，实现了龙口堰项流速和截流堤边坡流速的联合计算，继而应用系统仿真的相关理论方法建立围海堵口仿真计算系统模型，并采用面向对象的结构化程序设计语言Delphi作为开发平台，编制围海堵口仿真计算系统软件。
A new method for stability assessment of the slope was proposed so as to give rise to reliability of the numerical simulation, which estimated the stability of the slope through the comprehensive analysis of the movement trend of velocity at the tracing points in the model, the failure zone as well as the displacement.
在判断边坡的稳定性时提出了一种新的判断方法，即运用边坡移动速度的变化趋势结合边坡的位移量以及破坏场范围判断边坡的稳定性，提高了数值计算分析的可靠性。
The stability analysis on the slope of the Zoo of Beijing Fengtai Forest Park is made by using Mohr-Coulomb model failure criterion to obtain the coefficient and stress of the slope stability and the cloud atlas of velocity destribution, and the slope stability is evaluated combining with the engineering geology.
应用FLAC软件，建立了山体边坡的力学模型和几何模型，采用Mohr-Coulomb模型破坏标准，对北京丰台森林公园动物园边坡进行了不同状态下的稳定性分析，得到了边坡的稳定系数和应力与速度分布云图，结合工程地质条件对边坡的稳定性进行了评价。
It was found that at each time step the hydrological elements of a flood process, such as sediment contents, turbulent velocity and resistance slope, vary in direct proportion with each other, which shows that energy dissipation by turbulence is dominant.
在一次洪水过程中，各时点含沙量随水流紊动及摩阻比降而正变，紊流消能规律占主导；而对于一个洪水过程整体，间歇性的泥沙与水流的滑脱影响积累起来，显示出泥沙制紊作用。
In the model adopted by the phenomenon and the related chart to analysis, that the horizontal surface slope, at the River Bend Heart Island, vertical velocity and sediment erosion and deposition, and other end of the dam will cause instability.
在通过对模型的现象和相关图表做出分析后，得出水面的横比降，弯道处存在的河心岛，纵向的流速以及泥沙冲淤等都会引起堤坝端面的不稳定。
The result indicates that FLAC is an effective method for analyzing the deformation of a slope either stable or unstble, and that excavated zones and mining velocity have some effects on the deformation.
结果表明：FLAC方法在分析复杂条件下的边坡变形特征方面显示了较强的优势，稳定边坡和不稳定边坡有着各自不同的变形特征，空区和开采速度对边坡变形产生一定的影响。
Based on UDEC modeling, the status of limited balance and failure of slope is defined by the changes of velocity vector and displacement vector.
同时，本文根据数值模拟结果，提出了从速度矢量和位移矢量的变化规律来定义边坡的极限平衡状态和破坏状态的方法。
An important characteristic of transportation in our country is over loading, which leads to early destruction of pavement especially on longitudinal slopes because of vehicle accelerating and decreased velocity. Theoretically, the reasons were investigated why asphalt pavement on longitudinal slope is destroyed.
我国的国情决定了我国国内道路交通的特点，普遍的超载重载致使高速公路沥青路面过早地出现了车辙破坏，尤其是在长大纵坡处，车辆的加速启动和减缓的行驶速度加速了破坏的产生。
And Track2 is the main trajectory, the falling rock at the end of which the falling rock has the highest energy.2 The intersection angle between the falling rock velocity and the slop surface during the collapse has great influence on the movement characteristics of the falling rock. And there is obvious relationship between the mass of the falling rock and the deformed slop gradient, which should be reflected in the calculation through the means of modifying the calculating slope gradient. Thus the defect that is unable to consider the mass of the falling rock is improved in the kinematic formula.3 The calculating results of the the kinematic formula based on probability are much better in accordance with the actual situation than which of the experiential formula, when using the modified calculating slope gradient in the kinematic formula based on probability.4 The motion feature of the falling rock has a significant difference when the mass of the rock has a large difference.
在三条主要的落石运动轨迹中，轨迹2上的落石在轨迹末端能量最大，破坏能力最强，所造成的损失最大，为主要的落石运动轨迹。2、落石碰撞时速度与坡面的交角对于落石的运动特征有很大的影响，而落石质量与形变后的坡度存在着较为显著的对应关系，应在计算中通过修正计算坡度予以体现，并由此完善运动学公式中不能考虑落石质量的不足。3、在基于概率的运动学计算法中运用修正后的计算坡度，并在选定范围内随机选取计算参数，使其计算结果与实际情况的符合程度大大优于经验公式。4、落石质量相差较大时，其运动特征具有明显的差异。
Eight different wind turbines at four strong-wind meteorological stations (Wuchi, Tungchitao, Lanyu and Hengchun) in Taiwan are tested. The simulated results show that the slope of the power curve (from cut-in to rated velocity) greatly affects capacity factor of wind turbine.
研究中使用八台不同规格型号的风机与台湾四处强风地带，即梧栖、东吉岛、兰屿与恒春，并依风机特性的不同，分组探讨此三参数与风场及风机特性之关系。
The economic indices of the operation system of the crushing station in the Buzhaoba surface mine are chosen as follows: Construction and mounting cost, the average unit haulage cost of trucks within the range served by the crushing station, c q=2.0 Yuan/(m3·km the entire haulage distance of the belt conveyor, Lo =1.0 km; the annual capacity of the crushing station, Q =3 Mm3(3.9 Mt/a the annual advancing velocity of the working slope, v =150 m/a; the average haulage distance when trucks run on the working slope, L g=1.2 km; the distance between working slope and the position where the crushing station is installed, a=0.2 km; the unit crushing cost, c P=0.3 Yuan/m3 (the annual ca- pacity of the surface mine is 13 Mt/a).
Buzhaoba露天矿破碎站运行系统的经济指标是根据以下被确定的：建站成本，由破碎站供给范围内的卡车的单位平均运输成本，c q=2.0元/；传输带的总的运输距离是L0=1.0公里；破碎站的年生产能力是Q=3百万立方米（390万吨/年）；工作斜面的年推进速度是V=150米/年；卡车在工作斜面上的平均运输距离为L g=1.2公里；工作斜面和破碎站被建立的地点之间的距离为a=0.2公里；单位破碎成本为c P=0.3元/立方米（露天矿的年生产量是1300万吨/年）。
It is concluded that the power resulting in air-leakage of gate loose coal is composed mainly of pressure fall in the gate, pressure difference between two sides of coal column, thermo-pressure, gravity pressure difference between any two locations of gate and velocity pressure resulting from the wavy slope of the gate.
研究结果表明，巷道松散煤体中的漏风流态为层流，其漏风动力主要由风流沿巷道的压力降、巷道煤柱两侧的压力差、热力风压、巷道起伏引起的动压差和巷道风流的位压差构成。
On the basis of the experimental data measured with a LDA system, vertical velocity distributions are well compared for negative and positive gradient of slopes in different hydraulic conditions in an open channel. It`s concluded as follows: With Froude number increase, Karman constant decrease. A unified formula to describe velocity distribution in adverse slope is proposed and well testified. Viscous sublayer thickness and buffer layer scope in adverse slope are both bigger than those in slope.
在分析激光测速试验资料基础上，通过与正坡上流速分布特性比较，发现负坡垂线流速分布中Karman常数相对正坡为小，负坡上的非均匀流粘性底层范围和厚度均大于正坡上的非均匀流粘性底层范围和厚度等；并在试验基础上提出了统一的垂线流速分布公式。
The study has determined that entire 9118? 04m3 mass of Yigong Landslide with V=112.7 m/s slide out; proved the mass fly through the narrow canyon about 3500m long keeping the velocity; discovered some evidences that the high speed debris-flow formed from that the high speed sliding mass impact the slope and is disaggregated on the canyon mouth; revealed the structure of HSLDF deposit and calculated the sizes for each part of it.
本研究确定了体积为9118万m3的易贡滑坡以V=112.7 m/s高速整体滑出；证明了滑坡是持速飞行通过约3500m的峡谷段的；发现了高速滑体在沟口碰撞解体并形成碎屑流的多种迹象；揭示了高速滑坡碎屑流的堆积结构并计算了各部分的规模。
Since wind velocity over the lee slope increases with the decreasing incident angle of the primary wind, coupling with lower threshold velocity for sand movement on a down sloping surface than on a flat surface, wind erosion takes place on the lee slope of the secondary ridges and finally leads to extension of the ridges.
主梁在主风作用时期，西北坡上粗颗粒残留且顺风向减少使粒径与分选性由下而上变细、变好，东南坡细颗粒积累和滑落面上重力分异作用使粒径与分选由上而下变粗、变差；次风作用时期，东南坡上部和丘顶的侵蚀使此处粒径变粗，而西北坡的慢速堆积使粒径变细但并未改变主风作用时期粒度分布格局。
Combined with the projects of Antaibao Coal Mine slope and Guyueqiao culturalrelic protection, a series of tests such as the wave velocity test in situ of Guyueqiao, the physical property test and the static mechanical test as well as the ultrasonic wavetest of the rock specimens from these fields and other places are carried out.
本文结合安太堡煤矿边坡工程和古月桥文物保护工程，对安太堡样品进行了超声波速测试，对古月桥展开了原位岩体测试和岩石样品室内超声波速测试；此外，还对其他工程采集的不同类型的岩石样品进行了超声波速测试。
The incipient velocity formula of sediment on bank slope of river bends is established based on the analysis on the forces acting on the particles.
通过对河湾岸坡上泥沙颗粒的受力分析，建立了相关的泥沙起动模式，从理论上推导出了对应的起动流速公式。
The slide surface is also determined by the velocity or displacement vectors of the unstable condition. Based on the new method, the factor of safety of Zhongjiawan bedding slope is calculated by UDEC and compared with the results obtained by limit equilibrium method. It is revealed that the value calculated by UDEC is close to that by LEM, which indicates that the new method is feasible and reasonable.
采用关键点位移／速度时程曲线的变化趋势对边坡的临界状态进行判断，采用失稳状态时坡体的速度／位移矢量图来判断与安全系数对应的滑动面将上述方法运用到钟家湾顺层边坡的稳定分析中，并将所得结果与极限平衡法计算结果进行对比，发现二者的计算数值相差较小，对比结果表明该方法是合理可行的。