基本参数

This paper superimposes the impact of the wind on the flame's basic trajectory to simulate the surface movement.While ensuring the consistency and continuity of the flame texture,it reduces the number of particles to enhance real-time rendering.Besides,the fidelity of simulation and adaptability under different scenarios are enhanced by implementing the artificial control on the parameters of the wind.

将不受风力时的火焰基本运动轨迹和风力影响相叠加，来模拟多风影响下火焰表面的运动，在保证动态火焰纹理一致性和连续性的同时，减少粒子数量，提高渲染实时性，并实现了风的参数的人为控制，增强了模拟效果的逼真度和在不同场景下的适应性。

A two-times locating method based on the gray contrast of surroundings is presented in locating central reference point. This method has better adaptability and robustness, and can basically meet for the accuracy of automatic locating center. Fourier spectral analysis is improved to obtain a more accurate ridge frequency in computing ridge frequency. The average ridge width is used in designing Gabor filters, so the filters have certain adjustability. The rotating invariance of fingerprint images is solved by the rotating of feature models in feature matching.

在中心参考点定位部分，提出了基于局部邻域灰度对比度的二次定位方法，该方法具有较强的适应性和鲁棒性，基本满足自动中心定位的准确度要求；在频率域估计中，改进了傅立叶谱分析法，提高了纹线频率计算的准确度；引入平均纹线宽度作为Gabor滤波器的设计参数，使滤波器具有一定的自适应性；在特征匹配阶段，通过对特征模板的旋转解决指纹图像的旋转不变性问题。

Moreover, the accuracy analysis for different measurements and parameters(such as time measure error, azimuth measure error, buoys error, baseline length and sound velocity fluctuation) are given respectively. To make the best use of the observation datas, the weighted least square localization algorithm is used to improve the accuracy in bistatic sonar. The simulation results show that the positioning accuracy of this algorithm is higher than the other four algorithms, with which the positioning accuracy in stations areas and side areas can be improved effectively.

同时，通过对系统各个因素，如系统的各观测量的测量误差、站址误差、基线长度、声速波动等参数对算法性能的影响，得出了各方法定位误差的分布规律；为了充分利用双基地声纳系统的观测数据，提高系统的定位精度，采用加权最小二乘方法对系统的数据进行优化处理，仿真结果表明该方法定位精度明显高于基本方法的定位精度，能有效的改善发射站和接受站侧边区的定位精度，且定位性能受站址测量误差的影响较小。

The modal parameters of some typical structures, such as cantilever beam, stiffened plate were calculated with the iteration method.

用这种迭代算法计算了几种典型阻尼结构悬臂梁和压筋板的模态参数，计算结果与试验模态分析结果或理论解析计算的结果基本一致。

Basic requirements of modern dry caigo ships such as deadweight, speed, restrictionto dimensions, and variable parameters such as block coefficient, dimension proportionsare analyzed.

本文对现代干货船的载重量、航速、主尺度限制等基本要求和方形系数、主尺度比值等变化参数进行了分析研究。

Based on exploding dynamics theory, the scope of smash area, crush area and crack area, which is shaped under the action of a blast wave and stress wave resulting from the explosion of cartridge bag, is studied respectively.

基于爆炸动力学理论，得出了药包爆炸裂隙区半径的计算值与药卷临界埋藏深度基本吻合的结论，从而证明了&三区&理论计算式的正确性，为特定条件下爆破工程控制参数的设计提供了理论依据。

Five versions of the vane cascade systems for the torque converter with the same basic geometric parameters were designed and the steady comparative experiments of these 5 versions versus the base version of W305 torque converter were performed.

在基本几何参数一致的基础上，设计了5种液力变矩器叶栅系统方案，并且对包括W305型液力变矩器比较基型在内的6种方案进行了稳态试验比较分析。

The proposal software has those basic functions, such as the drawing database management, the literature compilation, the selection of scheme and parameters of foundry technology, the casting weight and modulus calculation, and autonomous Learning.

该软件具有图库管理、资料查阅、铸造工艺方案和参数选择、铸件重量和模数计算及自主学习等基本功能。

In addition, the effects of current, cathode cone angle and arc length on the current density and arc pressure distribution at anode surface in GTA welding are analyzed by the use of the built arc model, and the computed results agree well with the experimental results.

另外，运用建立的电弧数学模型，分析了焊接规范参数变化对直流GTAW电弧阳极表面电流密度和电弧压力径向分布规律的影响，计算结果与实验结论基本一致。

Intake efficiency is the most fundamental and important parameter for engine performance, yet the open and close timing as well as the lift depth of the intake valves are determined by the contour curve of the camshaft, that means the valve timing and lift depth are constant and fixed.

进气效率，是引擎最基本也是最重要的性能参数之一。而进汽门的开启时间与关闭时间以及扬程的大小是经由凸轮轴的轮廓曲线所决定，亦表示汽门正时与扬程是固定不变的。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。