查询词典 computation time

The data for Shanghai Electric Power stock from April 24 to July 22 2008 are analyzed using Matlab. Compared with the standard genetic algorithm, the results show that the improved algorithm reduces the false alarm rate and shortens the computation time.

对上海电力股票2008年4月24日至7月22日的数据利用MATLAB进行了模拟，与标准遗传算法比较，改进后的算法降低了误报率，缩短了运算时间。

To improve the performances of Saitou and Nei's algorithm and Studier and Kepler's improved algorithm for constructing the Neighbor-Joining phylogenetic trees, reducing the time complexity of the computation, a fast algorithm has been developed.

以混沌游戏为例子，利用二分技术对这类递推问题进行了并行算法设计，分析了这类算法的时间和空间复杂性以及适用范围。

A new method of locating a center-point of the circular projection was proposed based on the vector sum and image template convolving a mask over the gray-scale image directly and using the frequency domain computation is to reduce the time complexity.

提出了基于矢量和的全局最优的圆心定位方法，并利用卷乘和频域方法实现定位的快速算法。

A sunlit time computation model based on the DEM data in rough terrain is developed in this paper.

在广泛总结前人研究的基础上，提出了一个改进的、基于DEM数据的、起伏地形条件下的日照时间计算模型，在以往计算模型的基础上引入地球曲率修正因子Q，提高了模型的计算精度。

Along with the science and technology unceasing development, the survey technology is more and more advanced, from the primitive manual surveying computation to the cyclostrophic wind cup survey technology, to uses modernized again the laser, the ultrasonic wave as well as the infrared and so on each kind of telesthesia technology surveys; At the same time, the survey result is more and more precise.

随着科学技术的不断发展，测量技术越来越先进，由原始的人工测量计算到旋转风杯测量技术，再到采用现代化技术的激光测，超声波以及红外线等各种传感技术来测量；同时，测量的结果越来越精确。

By using the transfer matrix method of multibody system, the hard problem of computation of the vibration characteristics of LRMLRS coupled with rigid bodies and elastic bodies is solved which is very difficult to the ordinary dynamic methods, and the vibration characteristics of LRMLRS which is varied when the number of rockets in the launch device is varied, is obtained conveniently. By developing augmented eigenvectors of the LRMLRS and its orthogonality conditions, the nonorthogonality problem of the multibody system including rigid bodies and elastic bodies is solved and the exact analysis of the dynamics response of the LRMLRS including rigid bodies and elastic bodies is realized. By using the random integer programming method, the hard optimization problem which contains continuous variables, discrete variables and random variables at the same time is solved. This method provides a technology for optimum design with random variables and discrete variables. The dynamic optimum design is realized to decrease the number of rockets consumption in the LRMLRS test. The simulation system of dispersion of fire is established by using the maximum entropy method to estimate dispersion of fire.

通过应用多体系统传递矩阵法，解决了刚弹耦合远程多管火箭多体系统振动特性这一通常力学方法不便于解决的计算难题，方便地获得了远程多管火箭振动特性及其随发射架上火箭弹个数变化而变化的情况；通过构造增广特征矢量及其正交性条件，解决了刚弹耦合多体系统特征矢量不具有通常意义下的正交性的难题，实现了对刚弹耦合远程多管火箭动力响应的精确分析；应用随机整数规划法，解决了同时考虑连续、离散和随机变量等多种设计变量的优化设计难题，为含随机和离散变量的优化设计提供了手段，实现了减少远程多管火箭试验用弹量的动态优化设计；建立了应用最大熵法估计的密集度仿真系统，优化射序和射击间隔，实现了提高远程多管火箭射击密集度的动态优化。

The results of this technique are of high practical use especially in the real time compression transformation of tetrahedral,finite element computation and rendering.

为了增加这些数据的可用性，有些科学计算产生了高精度数据集，这些数据

At first in the preliminary design this paper computes the linear damping coefficient of the viscous damper employed in this project using Composite Response Spectra approach, meantime, this paper proves that reducing the exponent of velocity of the piston can increase the magnitude of the dissipative energy, because of the viscous damper employed in the practical project character nonlinear behavior; next this chapter performs analysis and comparison between the building without and with the viscous dampers aforementioned when the building suffers from various Time Domain Response, from the angle of displacement, interstroy drift, velocity, interstory velocity, acceleration, energy, maximum axial force of the dampers and of the column etc., in order to prove that the incorporating the viscous dampers into the buildings has great superiority on enhancing its aseismic performance ; furthermore, this chapter also expatiates on diverse assembly form of the viscous dampers that results in the adverse impact on the internal force of the structural member in this building, on the ground of which this segment bring about the preference of the assembly form of the viscous damper; finally this chapter points out the sphere of application of the analysis and computation using Composite Response Spectra approach in design: it is available in well-proportioned stiffness structures and isn抰 available in the structures that contain weak story. It is recommendable, particularly, to incorporate the fluid viscous dampers into this structure that contain weak story to refrain earthquake and reinforce, such as the Central Hall of Shanghai Exhibition Hall.

首先使用了反应谱分析法设计出欲附设的粘滞阻尼器的线性阻尼系数，由于实际工程所用的粘滞阻尼器具有非线性的特性，故而笔者又证明了降低速度指数对提高粘滞阻尼器的耗能量的优势所在；接着分别从位移、层间位移、速度、层间速度、加速度、能量、最大阻尼出力和柱轴力等不同的角度对结构在附设粘滞阻尼器前后的时程反应进行了分析对比，籍此在实际工程中证明了附设粘滞阻尼器对于提高结构的抗震性能的优越性；再者，笔者还阐述了采用不同的粘滞阻尼器布置方式对结构中构件内力特别是柱轴力和基座竖向反力产生的不利影响，并在此基础上提出了布置方式的优选；最后，指出了反应谱法在设计中的适用范围：对于均匀结构反应谱法能够使用，而对于含有薄弱层的结构反应谱法并不适用；对于类似于上海展览馆中央大厅的含薄弱层的结构尤其值得使用粘滞阻尼器的方法进行抗震加固。

In the method I use almost completely local data that significantly reduces the amount of exposure and computation time.

算法中用到的是几乎完全局部的数据，从而大大减少了射线的照射剂量和算法的运行时间。

The pyramid model instead of local window model was used to decrease the computation time in computing local triangular prism.

利用金字塔模型替代了局部分形计算中的窗口模板，从而对局部三角棱柱面法进行了改进，减少了图像局部分形维数的运算量。

There are different types of personal loans available.

有许多不同类型的个人贷款优惠。

The above mentioned teaching model of spiral rising can be used to avoid rigidness in teaching.

上述螺旋式上升的教学模式，可以避免教学形成模式後的僵化现象。