查询词典 quadratic form

For a general parametric curve/surface, we usually cannot compute its exact implicit form. Even though its exact implicit form can be computed, the curve/surface implicitization involves relatively complicated computation and the degree is higher. Moreover, it may have unexpected components and self-intersections. All these unsatisfied properties limit the applications of the exact implicitization. So finding curve/surface approximate implicitization has become a practical problem. In this paper, we present an algorithm to solve the approximate implicitization of a given parametric curve by using a quadratic algebraic spline curve.

由于精确隐式化过程不一定可以实现，即使可以实现隐式曲线曲面的阶数高计算复杂，并且具有不希望的自交点和奇异分支，从而限制了隐式化的运用，所以寻求参数曲线曲面的近似隐式化问题成为很实际又重要的问题，提出利用二次代数样条曲线来实现一般平面参数曲线近似隐式化的一种算法。

For instance, in order to use the quadratic formula you must have the quadratic in standard form first.

例如，要运用二次方程你首先得懂得二次方程的标准格式。

Keywords: Setting of Optimal PID Parameters; Stability of Control System Quadratic Form Performance Index; Control Quality Indexes

图1给出了一个常见的空调DDC系统PID控制的闭环连接原理框图。它的闭环传送函数

Firstly, the existence of Lyapunov function with the quadratic form for linear singular systems is discussed.

然后指出对X的任何正定二次型V，它沿线性广义系统的导数V都不会是X的负定函数。

By analyzing the LFM signal in colored noise, a crossspectral ESPRIT method based on quadratic form transformation was proposed.

对色噪声背景下LFM信号进行了分析，提出了一种基于二次型变换的互谱ESPRIT方法。

Given a response surface equation in quadratic form, the Six Sigma Black Belt will be able to compute the stationary point.

给出一个二次方程式形式的响应曲面公式，6西格玛黑带应能计算出驻点。

Then using the Zhengding quadratic form theory, had proven a function of many variables condition extreme value's sufficient condition, and has given its application example.

而后利用正定二次型理论，证明了多元函数条件极值的一个充分条件，并给出了其应用的例子。

The problem of finding bounds on the correlation functions of the multiple-phase spreading sequences is generally transformed to that of minimization of a quadratic form.

将多相扩频序列的理论界问题统一转化为一个二次型的最小值问题。

In this paper, the inertial theorem of real symmetric matrix has been proved by three methods in three aspects: the relationship between real symmetric matrix and real quadratic form, the relationship between real symmetric matrix and symmetric bilinear function of real linear space.

从实对称矩阵与实二次型的联系、实对称矩阵与实线性空间的对称双线性函数的联系以及将实对称矩阵作为研究主体这三个角度，介绍实对称矩阵的惯性定理的三种证明，以期加深对实对称矩阵的惯性定理的理解。

Constructing a unitary matrix for transformation of coordinates by means of quadratic form theory,the Hamiltonian of the 3D coordinate-momentum coupling harmonic oscillator is transformed into diagonalmatrix,it not only offer a general mathematic method for solving this kind of problems,but also have an active effect upon upgrading students ability to solve physics problems by mathematical theory.

利用二次型理论构造一个幺正矩阵进行表象变换，将|x〉表象中的三模坐标-动量耦合量子谐振子体系的哈密顿量对角化，这不仅提供了一种解决该类问题的一般数学方法，同时对培养和提升学生运用数学工具解决复杂物理问题的能力也具有积极的指导作用。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。