可计算地

Numerical control lathe have following outstanding superiority than traditional lathe include:Can process out complicated parts, such as the curve coming out in traditional machine tooling, curved surface,etc;Because computer have superb operation ability is can instantaneous to calculate out each coordinate axis instantaneous amount of exercise that should move accurate, So can compound into the complicated curve or curved shttp://www.51lun-wen.cnurface ;Can realize automation that process is and flexible automation, so efficiency constant traditional lathe raises by 3-7 times;Because the computer has memory and stores ability ,Can carry out automatically according to the order that the procedure stipulates,so realize automation;Proceshttp://www.51lun-wen.cnng precision of part high, size disperse degree light, make and assemble easy, No longer need to" repair the damaged parts of a machine and supply replacements";Can realize the concentration of many processes,have many kinds of self-containment functions,such as autoalarm, controlling, automatic compensation automatically,etc;Therefore can realize that nobody guards and processes for a long time.

机床数控化改造可以加工出传统机床加工不出来的曲线、曲面等复杂的零件。数控机床比传统机床有以下突出的优越性，由于计算机可以瞬时准确地计算出每个坐标轴瞬时应该运动的运动量，因此可以复合成复杂的曲线或曲面；可以实现加工的自动化，而且是柔性自动化 http：//www.51lun-wen.cn ，从而效率可比传统机床提高3～7倍；由于计算机有记忆和存储能力，可以将输入的程序记住和存储下来，然后按程序规定的顺序自动去执行；加工零件的精度高，尺寸分散度小，使装配容易，不再需要"修配"；可实现多工序的集中，减少零件在机床间的频繁搬运；拥有自动报警、自动监控、自动补偿等多种自律功能，因而可实现长时间无人看管加工。

Numerical control lathe have following outstanding superiority than traditional lathe include:Can process out complicated parts, such as the curve coming out in traditional machine tooling, curved surface,etc;Because computer have superb operation ability is can instantaneous to calculate out each coordinate axis instantaneous amount of exercise that should move accurate, So can compound into the complicated curve or curved surface ;Can realize automation that process is and flexible automation, so efficiency constant traditional lathe raises by 3-7 times;Because the computer has memory and stores ability ,Can carry out automatically according to the order that the procedure stipulates,so realize automation;Processing precision of part high, size disperse degree light, make and assemble easy, No longer need to" repair the damaged parts of a machine and supply replacements";Can realize the concentration of many processes,have many kinds of self-containment functions,such as autoalarm, controlling, automatic compensation automatically,etc;Therefore can realize that nobody guards and processes for a long time.

机床数控化改造可以加工出传统机床加工不出来的曲线、曲面等复杂的零件。数控机床比传统机床有以下突出的优越性，由于计算机可以瞬时准确地计算出每个坐标轴瞬时应该运动的运动量，因此可以复合成复杂的曲线或曲面；可以实现加工的自动化，而且是柔性自动化，从而效率可比传统机床提高3～7倍；由于计算机有记忆和存储能力，可以将输入的程序记住和存储下来，然后按程序规定的顺序自动去执行；加工零件的精度高，尺寸分散度小，使装配容易，不再需要"修配"；可实现多工序的集中，减少零件在机床间的频繁搬运；拥有自动报警、自动监控、自动补偿等多种自律功能，因而可实现长时间无人看管加工。

Line Integral Convolution method is a powerful technique for representing directional information in vector field visualization.

矢量场可视化是科学计算可视化中的一个研究热点，基于纹理图像的流线积分算法可以清楚地描述矢量场的细节。

This method implements a block cipher algorithm which has involutional structure by using module-based partial reconfiguration technology of Xilinx FPGA,and gives the solutions to the key technical issues such as cooperation between modules,communication channels design and timing adjusting scheme.

加密算法实现的对比实验验证了该方法的有效性。1引言可重构计算是当前计算机系统结构领域的发展趋势之一[1]，它利用可重构逻辑器件的在线编程能力以硬连线逻辑高效地实现算法操作，在加解密、图像处理等领域有着重要应用。

The results show that the equations have benefit to the deduction of the pantograph's mechanical differential equations.

研究结果表明：利用升角与升弓高之间的关系，可简化受电弓运动微分方程的推导；应用所建立的力学模型、实测数据以及简化公式可更准确地分析和计算弓网系统的力学行为。

System computes combined navigation system of GPS/IMU, VECTOR and ascendable geometry stable platform, proceeds in space registration and time synchronization, calculates the system??s accurate space, time, stance and course. Planar laser scanning data was filtered, registered space-wisely and time synchronously and fuse computered with other sensor??s data, extracted to 3D solid model of characteristic information of the road and outside of street, continuously extracted to point, line and plane, reconstructed combined with CCD camera data and visualized to 3D model true scene, finally implement acquisition and process of 3D space data timely, initiatively and integrally.

该套系统通过对GPS/IMU组合系统导航解算、VECTOR和升降几何平台进行空间配准、时间同步处理，计算出系统精确可靠的空间时间和姿态航向信息，二维激光扫描仪数据经过滤波去噪、和其他传感器数据融合、三维空间计算，解算出道路和两侧街景的三维空间数据模型，对空间激光数据模型提取点线面特征值，结合CCD相机数据进行立体重建和可视化，实现了实时、主动、完整地获取和处理三维空间数据信息。

Based on 135 actual data by the investigation of 45 pl ots and 225 sample plots in Qinling to the maximum crown density of easi ly burning layers, to the amount of the surface burning material and to t he absolute water-content ratio in the surface burning material, and b y means of dissimilarity analysis method, 45 plots we have investigated can be o bviously divided into 6 groups.

根据秦岭林区45块标准地和225个样方的冠层易燃物最大密度、地表可燃物载量及地表可燃物绝对含水率3个实测值的135个数据，运用Dissimilarity analysis计算认为，调查的45块标准地明显地可聚为6类。

The numerical result shows that this method can correctly and quickly separate pure compress wave and pure shear wave from hybrid wave field with high precision, good boundary absorption, and the numerical process is stable, so it can be used to guide multi-wave multi-components seismic datum processing, and also point out that the method has difficulty to separate the coupled wave type such as surface wave.

数值模拟结果表明，该方法能够从混合波场中准确地分离出纯纵横波波场，且精度高，边界吸收效果好，计算速度快，计算过程稳定，可用于指导实际多波多分量地震资料处理，同时指出本文算法对相互耦合的波型无法实现准确分离。

For studying the offshore platform with positivepressure spouted and strengthened pile foundation, the first important step is tocalculate the bearing capacity of foundation. This kind of platform is such a new typeone that there is no existing criterion to follow. Furthermore, the situation of thegroundwork is complicated due to the application of strengthening technique, so theconventional computation method of bearing capacity does not take its properties intoaccount.

正压冲固平台是新型平台，没有现成的规范可循，而且由于平台采用了加固技术，使地基情况变得复杂，用传统的承载力计算方法难以真实地反映这种平台地基的特点和性质，所以为计算平台承载能力选择正确有效的方法成为研究的关键问题之一。

The fiber are successfully used in the practical noise control. The model of aerodynamics in the course of the intermittence exhaust is simplified into exhaust problem of two stage series cylinder. Digital calculation program which can really imitate aerodynamics characteristics in the exhaust process is established. A simple formula which can be used for calculating the volume of the silencer expansion chamber is established.

作者指出间歇性排气过程的空气动力模型可简化为两级气缸串联的排气问题，编制的数值计算程序真实地模拟了排气过程中的空气动力学特性，建立了消声器膨胀消声室体积大小计算的表达式。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。