查询词典 algebraic expression

In SART（Simultaneous Algebraic Reconstruction Technique）,there is no restrict to image space,so the image space's noise will increase after the definite number of iteration.

联合代数迭代方法对重建图像空间是无约束的，其迭代到一定次数后，图像空间的噪声会不断增加。

Two construction methods for fewer views from limited range—ART and SART are studied, and simulated a physical fields views whose variation of deflection is equal to double-Gauss function, and then reconstructed it, and still analyzed the accuracy of the reconstruction methods.After study and analysis on the theory of ART and SART, and after analysis the properties resulted from their theory root cause, A modified simultaneous algebraic reconstruction method is presented, which is based on ART, this method takes into account both the pixel itself and the pixels close by it which are crossed by the same ray.

论文研究了两种有限投影方向的非轴对称场的CT重建算法——代数重建法和联合代数重建法，并用VC++程序模拟实现了折射率分布为双高斯函数的场的正向投影及重建过程，并对所用算法的重建精度进行了分析。

ABSTRACT To generalize the ordinary bialgebra Takeuchi introduced the x R-bialgebra in the context of algebraic topology and classification...

为了推广双代数的概念，Takeuchi在代数拓扑和代数分类的背景之下，提出×〓双代数的定义。

Based on the idea of solving nonlinear evolution equations, algebraic method, algorithm reality and mechanization, in Chapter 3, we firstly present the new generalized tanh function method, and apply it to construct the exact solutions of the (2+1)-dimensional Kadomtsev-Petviashvili equation.

第三章基于非线性发展方程求解代数化、算法化、机械化的指导思想，以吴方法和符号计算为工具，首先提出一种新的广义tanh函数方法，并将其应用于(2+1)-维Kadomtsev-Petviashvili方程的精确解构造。

Spdf} interacting boson model is an algebraic scheme with which the nuclear quadrupole deformation, octupole deformation and their coupling can be unifiedly described.

{spdf}相互作用玻色子模型是统一描述原子核四极形变、八极形变及其耦合的代数模型。

According to the relevant fuzzy algebraic method, operator of compution more contributing factors is defined, given a funtion for measuring quality of Web service on unweighted factor.

根据模糊代数的相关方法，定义了计算多个因素联合贡献的算子，给出了一种无加权因子的Web服务质量计算函数。

In chapter 8, the turbulent flow in a vaneless nozzle is computed A 3-D turbulent algebraic eddy-viscosity model is proposed with the intention of considering anisotropic effect.

7、根据无叶喷嘴内旋转流动的特点，提出了各向异性的湍流代数模型以求反映湍流的三维性。

According to the analysis of general sm all signal stability m ethod,the conclusion can be drawn that the algebraic- equation constraints and the coupling between state variables are responsible for the complex dynam ic behavior of the systems.

文中首先对研究系统稳定问题的小扰动方法进行了分析，认为非线性动力系统的代数方程约束和各状态量之间的耦合关系是造成系统动态特性十分复杂的重要原因，进而利用同伦函数的概念给出了一种确定线性化系统中特征值与状态变量对应关系的方法。

We also present the recent results we obtained about algebraic attacks and some other attacks on stream ciphers.

同时介绍了我们得到的关于代数攻击以及流密码攻击方法的一些最新研究成果。

Usually the graphical or algebraic methods are used in the design of such jibs.

组合臂架的设计通常采用作图法和一般代数法。

Diabetes is a social disease that affects several million people worldwide.

糖尿病是一个社会性疾病，全世界有数百万人罹患此病。

I'll call you on Friday to see if we can reschedule our luncheon meeting at your convenience.

我星期五会给您打电话在您方便的时候我们重新安排我们的午餐约会。