查询词典 computation time

Because the coupling condition of NNGFM arises from the net current continuity imposed at the volume element interfaces, the relatively complex conversion formulation for partial current continuity condition of NGFM is unnecessary when applying G. E. T., and computation time is saved. The coefficient matrix of the coupled equations is tridiagonal, so it can be solved by forward elimination and backward substitution method.

NNGFM的基准校验及在大庆200MW核供热堆(NHR-200)上的应用表明，NNGFM计算精度和速度与第三类边界条件格林函数节块法NGFM〓相当，在相同精度下速度比CITATION能快1000倍；NNGFM给出的本征值、功率分布较NNGFM误差能减少一半以上，为更精确计算工作期、卡棒当量提供了条件。

Within this context, four specific areas are addressed:(1) By means of finite integration technique, a new kind of the first order partial difference equation is derived from the original disperse transmission line equation of the uniform waveguide's. As it is the kind of one dimension Dirichlet's boundary problem, it is convenient for us to solve this equation from the leapfrog scheme. Because computation is carried out in one dimension, both high calculation efficiency and precision have been obtained in this method. Meanwhile, this method provide us a different selection to simulate the transient response of waveguide with non-simplical, for examples cylinder and elliptic waveguide, and avoid solving the second order equation, or using finite difference time domain to simulate a three dimension problem, sometimes the latter precision is not satisfied with the need, or low efficiency.

在这一研究内容下，主要研究四个方面的问题：(1)在完成金属波导传输线方程时域形式的基础之上，应用有限积分技术，把波导特征模式的色散传输线方程，化简为一组新的一阶偏微分方程组，该边值问题属一维Dirichlet边值问题，从而便于用蛙跳格式求解，由于是在一维中计算，该方法具有很高计算效率和精度，从而避免了以往为得到金属波导中特征模的时域响应特性，须要求解二阶方程，或用时域有限差分方法求解三维问题的方法，对于后者来说，计算有时是不准确的，或是很耗时的例如计算诸如圆波导、椭圆波导等其它复杂形状的波导。

Though it can not avoid the problem of image ergodicity, it can decrease the image matching calculation and reduce the computation time of the matching algorithm.

可以通过"子模板"的匹配实现对图像目标的识别与跟踪，虽然同样存在图像匹配遍历问题，但可大大减少图像匹配的计算量，减少图像匹配的计算时间。

The proposed method not only reduces computation time significantly but also provides error estimation for the dynamic analysis.

该方法不仅大幅度地减少了机时，而且提供了动力分析的误差估计。

The mathematical models of the delay of the GPS signal in the circumstance are put forward respectively. The computation of orbital arc of the two satellite constellations is based on two body problem and perturbations models. An algorithm based on the IRI model and thin layer model is used to simulate the ionospheric delay of the GPS signal. The error models of observation, multipath, relativity and antenna phase center bias are also researched. Under the consideration of the autocorrelation of the electronical measurements, the autoregressive model of time series is introduced into the noise models.

在信号仿真中，研究了利用二体运动和摄动法计算LEO卫星至GPS卫星星座的几何距离的问题；在信号的误差模型中，研究了电离层时延的IRI2001模型和单层投影模型；讨论了观测误差、多径效应、相对论效应和天线相位中心偏移的误差模型；结合电子测量噪声的具有自相关特性的经验，研究了观测误差的AR模型；结合实测数据分析，讨论了接收机钟差和卫星钟差的误差建模问题。

Its very low computation cost is about the same as that of 1-d ESPRIT, and it can get fair results at the same time.

它的计算量很小，和一维ESPRIT算法相当，同时也能够获得较高的估计精度。

At the time of final settlement following the end of the year, no recomputation and reconversion need be made in respect of income in a foreign currency for which tax has already been paid on a quarterly basis; only that portion of the foreign currency income of the entire year for which tax has not been paid shall, in respect of the computation of taxable income, be converted into Renminbi according to the exchange rate quotation on the last day of the tax year.

第十五条企业所得为外国货币的，在依照税法第十五条规定分季预缴所得税时，应当按照季度最后一日的外汇牌价折合成人民币计算应纳税所得额；年度终了后汇算清缴时，对已按季度预缴税款的外国货币所得，不再重新折合计算，只就全年未纳税的外国货币所得部分，按照年度最后一日的外汇牌价，折合成人民币计算应纳税所得额。

However, the time-consuming modulo exponentiation computation, which has always been the bottle-neck of RSA.

但该算法所采取的幂剩余盘算会消耗太多的时光，一直是制约其普遍应用的瓶颈。

The method solves the real time problem of how to extract the positive sequence active and reactive currents from an unsymmetrical and distorted three phase system by fan-in theory, and simplifies the system structure and reduces the computation burden.

既解决用扇合矢量法从三相不对称、含畸变的系统中提取基波正序有功、无功电流的实时性问题，又达到简化系统结构和减少计算量的目的。

According to the analytical expression, the phase grating of periodic and non-periodic system is calculated and the result keeps good agreement with that by fast Fourier transform, and the computation time is reduced up to 7 times comparing with fast Fourier transformation which is important to realize monitoring in situ in modern high-resolution technique.

3由以上解析式计算得到的晶体和非晶体的相光栅结果与快速傅立叶变换的结果一致，且能有效地缩短计算时间，这对于实现现代高分辨象的实时监测是很有意义的。

There had been a moment during the breakfast meeting, though, after the backslapping and the small talk and when all of us were seated, with Vice President Cheney eating his eggs Benedict impassively and Karl Rove at the far end of the table discreetly checking his BlackBerry, that I witnessed a different side of the man.

那次早餐会期间，在表示过关心和寒暄以后，我们所有人坐了下来，我注意观察了一下，副总统切尼面无表情地吃着班尼迪克蛋（Eggs benedict，源自美国，以英式松饼、火腿、水煮蛋以及荷兰酱组合而成），卡尔。罗夫在餐桌的远端谨慎地经常查看他的黑莓手机，我目睹了他所不为人知的一面。

Talk Undelete failed; someone else may have undeleted the page first.

Talk 无法删除选定的页面或图像（它可能已经被其他人删除了）。