查询词典 gradient of scalar field

Both theory analysis and simulation results illustrate the validity of the general scalar chaotic signal synchronization system.

理论分析与计算机仿真结果均证实了控制方案的有效性。

In Part 5, the stability of linear large-scale singular dynamic system is investigated by using the method of vector generalized Lyapunov function and the sum type of scalar generalized Lyapunov function, respectively.

首先研究线性广义系统二次型李雅普诺夫函数的存在性；然后建立按线性近似系统决定非线性广义系统稳定性的准则；进而改进广义李雅普诺夫函数法以研究广义系统的稳定性；最后提出利用非线性函数的偏导数矩阵判别非线性微分-代数系统稳定性的若干简便判据。

Our company has established agencies in Beijing Guangzhou and Wuhan focusing on the distribution and sales of coating detecting instruments and experimental equipments from professional manufacturers in America Japan England and Germany including the Oven Temperature Track Color Difference Meter Thickness Gauge Glossmeter and other coating experimental and detecting instrumentsbesideswe also supply the market with series product of Scalar digital microscope.

武汉远京东和贸易有限公司（武汉康信科仪设备有限责任公司）致力于涂装检测仪器及实验设备的销售和服务，拥有多年的一线专业经历，细致的售前推介、丰富的实践经验和完渼迅捷的售后服务使我们颇获客户好评。公司目前在广州、北京、武汉等地设有服务机构，代理销售来自渼国、日本、英国和德国多家专业场商的涂装检测仪器和实验设备，包括色差仪、炉温跟踪仪、涂层测厚仪和光泽仪等涂装实验检测仪器和日本Scalar数码显微镜系列产品。

Recent activities for the airborne scalar gravimetry are summarized in this paper, they includes five aspects, viz.

航空重力测量可分为航空标量重力测量、航空矢量重力测量和航空梯度重力测量。

A general class of solutions to nonlinear scalar equations with static cylindrical symmetry is obtained in the form of a hyperbolic function series.

利用双曲函数级数的技术，研究了静态轴对称非线性标量方程的解析解。

In the proof of the theorem we reduce theestimate of solutions to hyperbolic system to the corresponding case fora scalar pseudodifferential equation of the first order, then weestablish the required estimate by using microlocal analysis.

在定理的证明中我们将双曲组化到相应的一阶拟微分方程的情形，进而利用微局部分析建立所需要的估计。

In this paper, three methods for color image retrieval have been presented: hypercomplex SVD image retrieval, combination of hypercomplex convolution filter and hypercomplex SVD image retrieval and hypercomplex matrix correlation image retrieval. We made comparison among these hypercomplex-methods, and compared them with the traditional image retrieval methods. Experiment results showed that the hypercomplex-methods we presented in this paper could well conquer the problems existed in traditional image retrieval methods, and their retrieval results are much better. Meanwhile, this paper presented a new color image quality assessment based on hypercomplex SVD. It is a novel color image quality assessment that can be used as a graphical or a scalar measure to predict the distortion introduced by a wide range of noise sources. It reliably measures the distortion not only within a distortion type at different distortion levels, but also across different distortion types.

提出了超复数奇异值分解检索法，超复数卷积滤波与超复数奇异值分解相结合的检索法以及超复数矩阵相关检索法等三种超复数彩色图像检索方法，在对提出的三种算法进行比较的同时也将其与传统图像检索方法进行了比较，结果证明，超复数彩色图像检索法能较好地克服传统图像检索方法存在的问题，且检索结果更优；同时，本文提出了基于超复数奇异值分解的彩色图像质量客观评估法，这种全新的图形化与数值化相结合的方法不仅能够准确评估出彩色图像的不同失真等级，还能够区分不同的失真类型，从真正意义上实现了彩色图像的质量评估。

In hyperelliptic curve cryptosystem,the most important and costliest operation is the scalar multiplication,and the halving algorithm is more effective than the doubling algorithm.

HECC中最重要且最耗时的运算是标量乘，二分法是一种比常用的倍点法更为有效的算法。

This method can be applied to the ECC.(2)The author stresses investigation about the scalar multiplication of divisor, which is the core algorithm in the hyperelliptic curve cryptosystem.

提出了一个关于除子的SWNAF(Sliding Windows Non_Adjacent_Form)标量乘法算法，它是基于滑动窗口的NAF算法，比普通的标量乘法的速度有大的提高。

In this article, we make some research due to some problems of HECC, including the math background of hyperelliptic curves cryptography, the algorithm of divisor scalar multiplication, and providing a kind of general digital signature based on hyperelliptic curves cryptography.

为了确保这一系统的稳定性与安全性，HECC的几个主要参数的选取问题就起了很大的作用，本文对这几个参数选取作了详细介绍，并且归纳了求基点和求阶的方法。

Alternatively, the con- trollers can use the synchronous rectifier itself or loss- less inductor current-sensing methods to provide overload protection with lower power dissipation.

另外，康威特罗勒斯可以使用同步整流器本身或亏损减少电感电流检测方法，以提供低功耗过载保护。

Mr. Dauber's other Schatz hangs in his home movie studio.

多伯把沙兹的另一件作品挂在家里的电影室。