查询词典 muzzle velocity

After the analysis it was concluded that the mean velocity fluctuations of the strata under Jidike Group in this working area could be divided into three zones: the minor velocity fluctuation zone in southern Dalaoba tectonic belt, the steep velocity fluctuation zone of the foreslope in middle YK structure and the zone from the bowtype thrusting tectonic belt in northern Qiulige to the minor velocity fluctuation zone in YK tectonic zone. On the basis of a good command of the regular patterns of the velocities in vertical and horizontal dimensions in the investigating area, the stack velocity was interpreted in a interactive mode by using the Depthteam Express modelling package of the Landmark system, converting the stack velocity into mean velocity by means of Dix formula. Based on the well drilling layering data, the velocity correction was executied to get the final corrected velocity model by using the Kriging Correction. By using this velocity model, we did the time to depth conversion and obtained the final depth structural map. After mapping by using the variable velocities, we came in for the display of the tectonic map of the seismic data.

经研究认为本区的吉迪克组以下层位平均速度变化可分成三个变化区域：南部大涝坝构造带速度变化平缓区；中部亚肯构造前缘斜坡区速度变化强烈区；北部秋里塔格弧形逆冲构造带前缘至亚肯构造带速度变化平缓区，在撑握工区速度纵、横向变化规律基础上，应用Landmark解释系统Depthteam Express速度建模软件包对迭加速度进行交互解释，利用DIX公式把迭加速度转换成平均速度，根据区内钻井分层数据采用克里金校正方法进行速度校正，得到最终校正后的速度模型，用此速度模型进行时深转换，得到最终的深度构造图，此次变速成图后，得到地震资料构造图显示。

Then the muzzle flowfield with muzzle brake was simulated with the aforementioned experience. Those complex phenomena including precursor shock caused by quickly moving of projectile, muzzle flow structure produced by propellant gases, affection of blast wave behind muzzle area which formed by leading angle of muzzle brake, etc, can be observed clearly by these simulations.

同时藉由此经验，模拟含炮口制退器之炮口流场，获得炮管内因弹体高速移动产生之先导震波现象、高温高压之发射药气体於炮口形成之喷流结构及制退器排气导孔对后方震波压力传导之效应等良好结果。

The computation results agree with the experiment results very well. The muzzle flow field of an artillery with a muzzle brake is also simulated. The main characteristics and the mutual relations of shock waves in the muzzle flow field are obtained by the simulation. On the basis of the simulation results, the influences of the brake holes on the muzzle brake capabilities are analyzed.

对某口径火炮带有制退器的膛口流场进行了数值模拟，其结果反映了制退器内外流场的主要特征和冲击波波系之间的相互作用，在数值模拟的基础上分析了3排侧孔对制退器性能的影响。

But it has more complicated velocities in the working area, and it locally develops high-speed boulder bed in neocene Xiyu Formation with a velocity 3700—4050m/s, its adjacent formation velocity: 2800—2900m/s; while it also develops low velocity gyprock that has a great variation in thickness (with an increasing thickness from south to north) with a velocity about 4000 m/s, its adjacent formation velocity: about 5000 m/s. And all this is the cause of the complexity of the velocity in this working area; thus to make the No.1 structure in northern YK reliable, in velocity modeling it has much research work to do, and it is also the topic of this graduation thesis.

但在工区内速度较为复杂，工区内局部发育上第三系西域组高速砾岩层，速度约在3700—4050m/s ，围岩速度约在2800—2900m/s，同时全区还发育有厚度变化较大的低速膏岩层，膏盐层的速度大约在4000 m/s，围岩的速度大约在5000 m/s，由此造成了本工区速度的复杂性，因此要准确落实亚肯北1号构造，还要在速度建模等方面做许多的研究工作，这也是本次毕业论文所要研究的课题。

Based on the simulation of 3D unsteady muzzle brake flow field, computed the force given to the barrel while the powder flow through the muzzle brake, calculated the max backlash velocity, and lastly got the efficiency of muzzle brake.

该方法以带炮口制退器三维非定常流场的数值模拟为基础，通过计算火药气体流经制退器时火炮身管的受力，计算出身管在火药气体作用下的最大自由后坐速度，进而根据制退器效率的定义得到炮口制退器的效率。

The lift-off angle of saltating sand grain follows LogNorm4 function distribution; lift-off horizontal velocity, vertical velocity and resultant velocity of saltating sand grain and falling angle and vertical velocity of saltating sand grain follow Gamma function distribution; falling horizontal velocity and resultant velocity of saltating sand grain follow Pearson IV function distribution.

跃移沙粒起跳、降落速度分布函数利用风洞实验获得的沙粒跃移运动的片断轨迹，反推出沙粒起跳角度服从LogNorm4函数分布，跃移沙粒起跳水平、垂直及合成速度均服从Gamma函数分布。

In order to predict real-time muzzle velocity, a theory method of error modifying coefficients of muzzle velocity was brought forward.

为对炮口速度进行实时预测，提出了炮口速度误差修正系数理论推导方法。

Usually the velocity at some distance apart from the muzzle is measured instead of measuring the muzzle velocity directly.

通常的速度一定的距离，除了炮口是不是衡量测初速直接。

INTRODUCTION Muzzle velocity is the bullet velocity at the moment when it leaves the muzzle.

言初速，是子弹速度的时刻离开枪口。

Two main types of muzzle brakes named baffle type and light weight type have been designed for carrying out the simulation and analysis of muzzle flow in this research. The utilizing of parameters from simulations and some given conditions to impact deflectors of muzzle brakes to make the recoil part get a momentum to move forward in order to lower recoil force have been expressed in this research as well.

中文摘要本研究以折流板及轻量化两种主要炮口制退器设计，进行炮口流场分析模拟，得到炮口周围之压力、气流速度、密度及温度等分布状况；并利用模拟所获得之数据配合已知之炮口条件冲击炮口制退器之折流板，造成火炮后座部份向前之动量，用以降低后座力，求出火炮装置炮口制退器后，以炮口效率为主之各项相关参数。

As of Tuesday, Google's results were still censored in China.

截至周二，谷歌的搜索结果仍受中国审查。

In order to make the positive action increase and negative one decrease, the sub-forces of the social factors must be adjusted to form a centripetal force.

在这一过程中，人的主体性发挥是社会有机体健康发展的灵魂。