特征速度

燃烧试验易于点火，能稳定燃烧，特征速度有较大提高。

And easy firing , stable burning , and comparatively large increasing of characteristic speed are demonstrated by combustion experiment .

依据特征线的特征速度是否小于宏观运动速度，模型是否依赖外来的速度-密度平衡关系以及模型代表的交通流特点等三项指标对模型进行了评价。

According to whether the characteristic speed is smaller than macroscopic speed and whether the model depends on foreign speed - density equilibrium relation , and according to the flow characteristic shown in the model , the paper proceeds to evaluate some models .

利用大半径处的旋转速度作为特征速度通常会导致更大的TF关系的弥散。

Using rotation velocities at larger radii generally leads to larger TF scatter .

过氧化氢和PE燃料组合的能量研究表明：发动机的比冲和特征速度与配比密切相关，与燃烧室压强关系不大。

The research of propellant energy performance indicates that the special impulse and characteristic velocity are significantly depended on O / F ratio and weakly depended on chamber pressure .

磁流体力学激波的特征速度

Characteristic velocity of MHD shock

液体粘度对气液固三相循环流化床颗粒循环速度和流型特征速度的影响

Effects of Liquid Viscosity on Particle Circulating Velocity and Flow Regime Characteristic Velocities in Gas-Liquid-Solid Three - Phase Circulating Fluidized Beds

本文介绍的紊流模型能准确提供特征速度和特征长度参数的数值。

The paper presents a model of turbulent flow , which can exactly provide data of the characteristic length and velocity of turbulent flow .

从细磁通量管运动方程组导出了特征速度、特征线及其相容关系。

The characteristic velocities and the compatibility relations along characteristics are derived from the system of equations for the motion of thin magnetic flux tubes .

利用一圈内飞行拦截的解替换奇异值，提出一种求解单脉冲多圈飞行拦截和脉冲分解多圈飞行拦截的特征速度等高线图的方法。

Two methods calculating contour of characteristic velocity for single impulse multiple-revolution interception and impulse dissembled multiple-revolution interception was presented , by using the solutions of lacking-one-revolution interception to replace the singularities .

最后通过实例验证了利用脉冲分解多圈飞行拦截特征速度等高线图设计的拦截轨道可以对分布在异面轨道的星座上的目标进行拦截。

Finally , an example proves that the intercept trajectory , designed by contour of characteristic velocity for impulse dissembled multiple-revolution interception , can intercept targets of a constellation distributing on noncoplanar orbits .

气缸内气流是以紊流形式存在，在计算气缸对流传热时要知道气流的特征速度和特征长度。

Airflow in cylinder exists in the form of turbulent flow . in order to calculate the convective exchange of cylinder , we have to know the characteristic length and the characteristic velocity of airflow .

利用发动机地面试验结果，引入广义的压强系数和推力系数，计算了发动机的特征速度、喷管喉部面积等参数。

The characteristic velocity , area of nozzle throat and other parameters are calculated by using the static test results of solid rocket motor ( SRM ) and introducing generalized pressure coefficient and thrust coefficient .

从固体发动机的特征速度、推力系数、燃烧室冲量系数和喷管冲量系数等因素出发，分析了发动机工作压强对战术固体火箭发动机比冲的影响。

The effect of operation pressure on the specific impulse of tactical missile solid motors is analyzed from several factors , such as characteristic velocity , thrust coefficient , impulse coefficients of the chamber and nozzle .

提出一种基于最小特征速度曲线的异面拦截区求解方法，并且分别给出了一圈内飞行拦截、单脉冲多圈飞行拦截和脉冲分解多圈飞行拦截的防区求解算法。

A method of computing noncoplanar intercept range based on minimum characteristic velocity curve was proposed . Furthermore , arithmetics of calculating the defence range for lacking-one-revolution interception , single impulse multiple-revolution interception and impulse dissembled multiple-revolution interception were given , respectively .

但是由于单脉冲多圈飞行拦截和脉冲分解多圈飞行拦截在转移时间不够长的情况下其解并不存在，采用同样的步骤求解特征速度等高线图会产生奇异值。

On the other hand , using the same process to draw contour of characteristic velocity , there will create singularities for single impulse multiple-revolution interception and impulse dissembled multiple-revolution interception , whose solutions are not existed when transfer time is not long enough .

仿真实验表明，该方法提取运动特征速度快，能够适用于室内室外等监视环境，对运动目标的数目、光照的变化以及噪声等具有较好的鲁棒性。

Simulation experimental results show that this method can rapid exact motion features , has better robustness in the number of moving object in the scene , illumination change and noise , and so on , so that suits for indoor and outdoor surveillance environment . 3 .

该文给出了一种利用图像矩阵直接计算的二维PCA，以类间散布矩阵的本征向量作为投影方向，取得了比利用总体散布矩阵更好的识别效果，并且特征抽取速度更快。

This paper gives a 2D-PCA , which uses original image matrices to compute between-class covariance matrix and its eigenvectors are derived for images feature extraction .

通过实验验证了SIFT算法与BOW算法相结合可以有效的提高特征匹配速度，在设定合理阈值的情况下仍能保证很高的匹配准确率。

BOW algorithm combined with SIFT algorithm can effectively improve the feature matching speed and high matching accuracy can still ensure with a reasonable threshold .

采用计算流体动力学（CFD）数值模拟的方法，在周期性脉动速度入流条件下，建立刚性动脉瘤模型并研究了动脉瘤模型中流场的特征（速度、压力、壁面剪切应力）。

With the inflow boundary condition of periodic pulsatile velocity , rigid aneurysm model is established and the features ( velocity , pressure and wall shear stress ) of the flow field in aneurysm are investigated numerically .

运用文献资料法和数理统计法，对世界优秀女子短跑运动员200m分段速度的特征及速度分配与成绩的关系进行了分析。

Through literature and statistics analysis , this paper studies the speed variation in different stage and the relationship between the speed distribution and the competition results of world elite women '200m sprinters .

最后，针对矩形特征检测速度快和HOG特征检测精度高的特点，提出了将矩形特征和HOG特征组合的方法。

It also can enhance the detection precision . Finally , a method combining the rectangular features with the HOG features is proposed , which integrates the fast speed of the rectangular features and the high accuracy of the HOG features .

求解非定常Navier－Stokes方程，数值预测了瞬态高压气体通过单空腔迷宫通道的流动，给出了反映流动基本特征的速度矢量图。

The unsteady Navier-Stokes equations are solved numerically to predict the flow of transient high pressure gas through single-cavity labyrinth channel . The velocity vectors plots presented show the basic features of the flow which is characterized by intense impact , intense vortex .

利用穿过青藏高原东北缘的两条地震测深剖面提供的PMP波形资料，研究了该区不同构造单元壳幔过渡带的复杂性、频谱特征和速度模型。

This study deals with complexity , frequency spectrum and velocity model of the crust mantle transitional zone in different tectonic units along the northeast margin of Qinghai Xizang plateau , based on P M P waveform data from two deep seismic sounding profiles passing through the area .

纹理特征的速度表明了目标区域的基本运动。

The velocities of texture feature represent the basic motion of the target areas .

首先提取两个关键的动态特征：速度幅值及方向角的变化率。

At first , two motion features must be obtained : velocity and the change-rate of direction-angle .

该方法能较好地解决面向对象分类法中特征选取速度慢，易漏选最佳特征值等问题。

This method can solve the problems of slow speed of feature selecting and missing optimal eigenvalues .

为了加快特征抽取速度，利用基于图像鉴别分析的维数压缩方法，对图像数据进行了压缩。

The dimension of images has been reduced using the dimension reduction method based on image discriminant analysis in order to speed the process of feature extraction .

本文利用该模型进一步研究了涌浪自由面变形特征、速度涡量场以及压力场的变化特征。

Further more , the model is used for the study of the free surface deformation characteristics , the vortex field as well as the changes of pressure field .

针对斗殴行为运动特征提取速度慢的难题，本文提出了一种基于运动矢量的斗殴行为运动特征提取方法。

Focus on the problems in fighting action feature extraction , which is slow , an method to extract motion feature of fighting action based on motion vector is presented in this paper .

通过对当前动态竞争理论的系统研究，笔者发现，研究内容主要集中在对竞争对手间互动规律的探讨上，而对动态竞争的突出特征&速度和强度关注较少，这方面的研究也比较少。

Through the systemic research of the current dynamic competition theories , the writer discover the study mainly concentrate on the rules of rival interaction , but pay little attention to the outstanding characteristic-speed and strength .