圆柱的

The discrete velocity ordinate method in the kinetic theory of gases is developed and applied to discretize the correspo

借助非定常时间分裂法和无波动无自由参数的NND耗散格式，建立直接求解微观分子速度分布函数的有限差分数值格式；研究并发展可用于离散速度坐标点选取和离散速度空间宏观取矩的高斯─埃尔米特无穷积分方法、等均间隔的牛顿─柯斯复合积分法、以勒让德多项式的根为积分结点的高斯─勒让德数值积分法，并应用于不同马赫数绕流模拟；通过对不同流域一维激波管问题、二维圆柱绕流问题和三维球体绕流的计算研究，并将计算结果与其他途径得到的研究结果诸如DSMC模拟值、N-S解及有关实验数据进行比较分析，创建了一套能有效模拟稀薄流到连续流不同流域气体流动问题简化的统一数值算法研究框架

While the experimental side force distribution over a slender body with a blunt ogive nose is basically consistent with the curve of the analogy predicted, and the characteristic points and half cycle of the experimental curve are basically constant with the roll angle changing 360°. But the local maximums in the curve are not the results as the analogy predicted, which is an important flow feature of 3-D slender body than that of 2-D cylinder.

而钝头拱形细长体在大迎角下的截面侧向力分布与脉冲起动横流比拟方法预测的侧向力曲线的形状是基本相同的，而且随着滚转角旋转360°，截面侧向力分布曲线的特征点和半周期基本保持不变，即它们都基本上不受滚转角变化的影响；但是截面侧向力分布曲线极值点形成的原因却是不同的，这是细长体绕流区别于二维圆柱绕流的一个重要特性。

Based on the structure of a non-tracking internal-concentrator solar PV-thermal tube collector and the absorber design requirements, the optical design for the compound parabolic concentrator with half cylinder absorber is proposed to improve the solar energy efficiency. Matlab software was used for the optimization and simulation of the concentrator curve and shape. The curve equation of concentrator for maximum incidence of light of the collector was obtained; and the installation locations for CPC/half cylinder absorber and the necessary CNC processing parameters were optimized.

针对非跟踪内聚光光电－光热复合管的结构及接收器的设计需求，对管内具有特殊形状的半圆柱接收器的复合抛物面聚光器进行了光学设计，并利用Matlab软件对聚光器曲线和形状进行了优化与数据仿真，得到了光热复合管能够得到最大入射光的聚光器的曲线方程、安装位置以及供数控机床加工所需的参数，给出了不同入射角的光线和光强分布图，提高了太阳能的利用率。

Numerical Simulation and Experimental Investigation on A Thermoacoustic Engine with Tapered Resonance Tube A symmetrical standing-wave thermoacoustic engine with tapered resonance tube has been numerically simulated with liner thermoacoustics. The simulation shows that using tapered resonance tube in thermoacoustic engine could decrease the velocity amplitude and lower the total acoustic power loss in the resonance tube. The experimental results indicate that the harmonic was suppressed effectively by using the tapered resonance tube, and the pressure ratio was improved.

采用锥形谐振管的热声发动机的数值模拟和实验研究利用线性热声理论，对一台采用锥形谐振管的驻波型热声发动机进行了数值模拟，发现采用锥形谐振管可有效降低工质气体的速度振幅，进而减小在谐振管中声功率的损失；与一台在相同频率下工作的采用等直径圆柱谐振管的驻波型热声发动机进行了实验对比，结果表明，在使用锥形管作为谐振管的热声发动机系统中，谐振管中的非线性效应得到了明显的抑制，热声发动机在基频模式下稳定运行，压比增大而加热温度降低。

This paper takes standard straight-cut gear parameterization modeling for instance, introduces the method which is based on development of MDT technology and MDT three – dimensional modeling technology. This research provides three – dimensional entity modeling of parts with precise curve outline. And it demonstrates a practical method for similar situations as well.

本文以标准直齿圆柱齿轮的参数化建模为例，论述了采用MDT的二次开发技术及其本身的三维建模技术建立这类具有精确的曲线轮廓的零部件的三维实体模型，也为其它类似的零部件的三维建模提供了一种切实可行方法。

The broidered and dentated cordon of the eight and twenty royal niches; the immense central rose window, flanked by its two lateral windows, like a priest by his deacon and subdeacon; the frail and lofty gallery of trefoil arcades, which supports a heavy platform above its fine, slender columns; and lastly, the two black and massive towers with their slate penthouses, harmonious parts of a magnificent whole, superposed in five gigantic stories;--develop themselves before the eye, in a mass and without confusion,with their innumerable details of statuary, carving, and sculpture, joined powerfully to the tranquil grandeur of the whole

那镂刻着二十八座列王雕像神龛的锯齿状束带层，那正中巨大的花瓣格子窗户，两侧有两扇犹如助祭和副助祭站在祭师两旁的侧窗，那用秀丽小圆柱支撑着厚重平台的又高又削的梅花拱廊，还有两座巍巍、黝黝的钟楼，石板的前檐，上下共六大层，都是那雄伟壮丽整体中的和谐部分，所有这一切，连同强有力依附于这肃穆庄严整体的那无数浮雕、雕塑、镂錾细部，都相继而又同时地，成群而又有条不紊地展现在眼前。注意，注意力集中

The broidered and dentated cordon of the eight and twenty royal niches; the immense central rose window, flanked by its two lateral windows, like a priest by his deacon and subdeacon; the frail and lofty gallery of trefoil arcades, which supports a heavy platform above its fine, slender columns; and lastly, the two black and massive towers with their slate penthouses, harmonious parts of a magnificent whole, superposed in five gigantic stories;--develop themselves before the eye, in a mass and without confusion,with their innumerable details of statuary, carving, and sculpture, joined powerfully to the tranquil grandeur of the whole

那镂刻着二十八座列王雕像神龛的锯齿状束带层，那正中巨大的花瓣格子窗户，两侧有两扇犹如助祭和副助祭站在祭师两旁的侧窗，那用秀丽小圆柱支撑着厚重平台的又高又削的梅花拱廊，还有两座巍巍、黝黝的钟楼，石板的前檐，上下共六大层，都是那雄伟壮丽整体中的和谐部分，所有这一切，连同强有力依附于这肃穆庄严整体的那无数浮雕、雕塑、镂錾细部，都相继而又同时地，成群而又有条不紊地展现在眼前。

Fruit dehiscent siliques, linear or rarely lanceolate or subulate, terete or rarely slightly latiseptate; valves papery to subleathery, with a prominent midvein and 2 conspicuous marginal veins, smooth or torulose; replum rounded; septum complete, membranous or rarely thickened, translucent or opaque, veinless or with a midvein; style cylindric, conical, or clavate, persistent, rarely obsolete; stigma capitate, 2-lobed, lobes not decurrent.

果开裂的长角果，线形的或很少披针形的或钻形，圆柱状的或很少稍具宽隔膜；纸质的裂爿到近革质，具一突出和明显边缘的2脉，平滑或；假隔膜绕行；隔膜完全，加厚的膜质或很少，不透明的半透明或，或具一；花柱圆筒状，圆锥状，或者棍棒状，宿存，很少废退；柱头头状，2裂，裂片不。

A non-singular single integral mathematical model is adopted to calculate the external intermittent and alternative longitudinal magnetic field acquired by single axisymmetrical and cylindrical hollow coil t which is coaxial to electrode and excitated by a revisable pulsed current of square wave t in austenitic stainless steel GTA welding.

针对奥氏体不锈钢外加纵向磁场的气体保护钨极电弧焊接时，与电极同轴的单个轴对称空心圆柱线圈在双向脉冲矩形励磁电流作用下产生的间歇交变纵向磁场，采用无暇点单积分磁场的数学模型，对＊TAW焊接外加间歇交变纵向磁场进行了数值计算，该方法具有模型简单、计算速度快和精度高等优点并讨论了该间隙交变纵向磁场的分布、磁场的均匀性及其纵向分量与径向分量的比率等规律及其对焊接行为的影响，认为横磁分量将削弱GTAW外加纵向磁场的有利作用，影响磁控电弧的焊接质量

Replacing the total reflecting mirror in the plane-parallel resonator by a compound TIR prism (so-called a plane-compound TIR prism resonator or a TIR prism resonator for short), the offset of output faculae was resolved satisfactorily.

根据泵浦光在聚光腔中的传播规律，提出了一种适合于小型化器件的相交圆柱聚光腔的设计方法。本文通过大量的实验和理论研究，完成了工程化的小型Cr〓：YAG被动调Q重频热传导自然冷却：YAG激光器的结构和参数设计，并确定了器件的最佳工作点，最后完成了样品机的生产。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了