查询词典 quadratic

Two practical methods based on eigenanalysis, minimax theorem and quadratic programming are proposed to estimate the frequency of sinusoidal signals with unknown lowpass envelopes from the single experiment data.

基于特征分析、极小极大定理和二次规划，提出了两种超分辨率窄带信号频率参数估计方法，分别称之为EMT和EQP方法。

Under quadratic loss function, we study the minimax admissibility of the estimate function and the linear prediction.

本文则在二次损失下研究了一般Gauss-Markov模型的可估函数与线性预测的Minimax可容许性。

We can expect the algorithm to quickly converge to a minimizer once in a neighborhood of a solution on which the objective is essentially quadratic.

我们可以期望目标本质为二次的一个解的邻域里算法一次快速收敛到最小值。

An algorithm has the Q-property if it will find the minimizer of a convex quadratic in a finite number of iterations.

如果一个算法能在有限步叠代内找到凸二次函数的最小值就称其具有Q-属性。

Through Fourier analysis, the optimization object was converted to find the minimum of a nonlinear multi-variable function with multi-constraint. The advanced sequential quadratic programming method was employed to find the minimum.

通过Fourier分析，将优化目标转化为一个求带有约束的多元非线性函数的最小值问题，利用序列二次规划方法获得最佳系数。

We conclude that normalized cubic Gauss sums which modular is primes in arithmetic progressions are uniformly distributed around the circle and we get that there is no rule like quadratic Gauss sums.

并由此得出，模为算术级数中素数的正规化三次高斯和在单位圆周上是一致分布的。因此，在三次情况下不存在类似二次高斯和的判别准则。

A quadratic curve is built as Mohr envelop based on Mohr's strength theory and results of triaxial tests.

基于Mohr强度理论和三轴试验结果，建立了Mohr破坏包线的二次型形式。

In modeling heavy tails,we focus on multivariate t distributions and derive the moment generating function of the quadratic approximation.Then we use Fourier transform,Chebychev's Inequality and numerical technique inversion to approximate VaR value of portfolio,compared with Cornish-Fisher Expansions normal model and Delta-Normal model.

在推导出多个外汇期权的投资组合的二次近拟的矩母函数表达式基础上，本文使用傅里叶变换、切比雪夫不等式、数值转换计算求出投资组合的VaR的值，并和基于多元正态分布Cornish-Fisher模型以及基于Delta-正态模型计算所得的VaR值了进行比较。

Using Pell equations on A,we give a new proof of the well-known fact that ifthe ideal class number of a real quadratic function field K = k equals to 1,thenD must be P or QR, where P,Q,R∈A are monic and irreducible ,and Q,R have odddegrees.

二我们应用A上的Pell方程这一初等方法重新证明一个已知的结果：实二次函数域K = k理想类数为1时， D只能为P或QR，其中P，Q，R∈A首一不可约且Q，R次数为奇数。

This paper analyzes the multilayer quadratic neural networks and a kind of Kalman filter learning algorithm.

提出了二次型多层前馈神经网络的卡尔曼滤波学习算法，并证明了该算法的收敛性。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。