查询词典 quadrature

There are no conductions about the obvious form and the error equation of Romberg's quadrature formula in present literatures.

然而现有的文献并没有给出其显示Romberg公式，给实际应用带来了诸多不便，也没有介绍Romberg公式具体的误差等式，只给出了阶数[1][2][3]，下面给出显示Romberg公式和误差等式。1显示Romberg公式的具体形式在现有的文献中，Romberg公式是借助于误差的事后估计法或Richardson外推加速法得到的，而且有结果6364211R=C？

Then, using the second-order central difference to discretize the time derivative of the displacement, and applying the quadrature formula to the mass matrix, a fully discrete lumped mass Morley element method i...

然后利用中心差分格式离散时间方向的二阶导数，再利用适当的求积公式得到薄板弯曲问题的集中质量Morley元全离散格式。

Romberg's quadrature formula ; error equation ; linear combinations

下面给出显示Romberg公式。由于90[73212327]，4，1，2，31123C=b？afa+fx+fx

This paper uses an improved charge density method and a more realisticcathode operating mode to simulate the electron optical properties of field emission guns. In the paper a special 6-point quadrature formula has been derived to accurately calculate potentials near theemiter surface and a spherical diode model has been adopted with the cathode operating at the partial space charge limitation.

场发射枪电子光学特性的数值模拟刘志雄，沈文忠，西门纪业（北京大学电子学系，北京100871）本文利用改进的电荷密度法和更接近于实际的阴极工作模型来模拟场发射枪的电子光学性质。

A solution of the secular problem of the quadrature of the circle, government premium 1,000,000 pounds sterling.

解决世上自古以来留下的难题：作与圆等积的正方形，并赢得政府颁发的一百万英镑奖金。

For this, with random Hough commutation is a foundation, through undertaking an analysis to sampling probability, combine Canny functor and method of Zernike orthogonality quadrature, the circle that put forward a kind to improve detects method.

为此，以随机Hough变换为基础，通过对采样概率进行分析，结合Canny算子以及Zernike正交矩方法，提出了一种改进的圆检测方法。

Because some years previously in 1886 when occupied with the problem of the quadrature of the circle he had learned of the existence of a number computed to a relative degree of accuracy to be of such magnitude and of so many places, e.g., the 9th power of the 9th power of 9, that, the result having been obtained, 33 closely printed volumes of 1000 pages each of innumerable quires and reams of India paper would have to be requisitioned in order to contain the complete tale of its printed integers of units, tens, hundreds, thousands, tens of thousands, hundreds of thousands, millions, tens of millions, hundreds of millions, billions, the nucleus of the nebula of every digit of every series containing succinctly the potentiality of being raised to the utmost kinetic elaboration of any power of any of its powers.

351因为几年前在一八八六年，当他埋头于探讨面积等于一个圆的正方形的问题时，他发现了一个数值的存在：倘若精确地计算到某种程度，就能达到比方说九九乘九乘这样庞大的量值和位数。所得数字要用细字密密匝匝地印刷成三十三卷，每卷一千页。为了统统印刷完毕，就需要购入无数刀、无数令印度纸，整数值的位数便是一、十、百、千、万、十万、百万、千万、亿、十亿，一切级数的一切数字作为星云的核心，以简明的形式所包含的累乘的可能性推到了极限地、能动地开展的一切乘方的一切幂级数。

The effect of frequency fluctuation on the quadrature filtering algorithm is also discussed.

分析了频率波动对正交滤波算法测量精度的影响规律。

Quadrature'.'' of the moon.

弦'。''的地方可以看得见。

So why are opposition and quadrature so significant?

所以为什么在他的对面或者四分之一处如此重要？

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。