查询词典 parameter

In the parameter estimation of the probability of default model,nonrandom sample selection will cause sample selec- tion bias and bring biased parameter estimation.

在贷款违约概率模型的参数估计过程中，样本选择的非随机性会产生样本选择性偏差，导致参数估计有偏。

Missirlis in article [1]. At the same time, a sufficient condition for convergence of the PSD method is given to be compared when the coefficient matrix A of the linear system Ax = b is a symmetric, positively defective matrix. In §3.2, an example is given to state that the range of our sufficient condition is wider than theorem 3.3 of article [1]. On the other hand, following a.n analogous approach of [14] and starting the functional relationshipwe have a perfect analysis for the PSD method to converge and optimum valves for the involved parameters under different conditions.Under the assumptions that A is a consistent ordered matrix with nonvanishing diagonal elements and the eigenvalues of the Jacobi matrix of A are real,we get necessary and sufficient conditions for the PSD method to convergence.The result is equal to theorem 1 of article [9].Under the same condition, we can see the optimal parameter and of corresponding spectral radius of thePSD method in [8]:(2)When A is a consistent ordered matrix with nonvanishing diagonal elements and the eigenvalues of the Jacobi matrix of A are imaginary or zero,we get necessary and sufficient conditions for the PSD method to convergence.In chapter 3, the optimal parameter and of corresponding spectral radius of the PSD method are given by table 3.3. Moreover, under the assumption 0

Missirlis在文献[1]中定理3.3的不准确，同时给出了当线性方程组Ax=b的系数矩阵A为对称正定阵时，PSD迭代法收敛的一个充分条件与之比较，并且在§2.3中用实例说明了对于一部分矩阵而言本文得到的充分条件广于[1]中定理3.3的充分条件；另一方面，按照文献[14]的方法，我们从PSD迭代法的特征值λ与其Jacobi迭代矩阵B的特征值μ的关系式：出发，在不同条件下对PSD迭代法的收敛性和最优参数以及最优谱半径进行了完整的分析：(1)在系数矩阵A为(1，1)相容次序矩阵且对角元全不为零，其Jacobi迭代矩阵B的特征值全为实数的条件下，给出了PSD迭代法收敛的充分必要条件，此结果与[9]中的定理1等价，此时最优参数及最优谱半径由[8]得：(2)第三章表3.3中给出了，当系数矩阵A为(1，1)相容次序矩阵且对角元全不为零，其Jacobi迭代矩阵B的特征值全为纯虚数或零时的PSD迭代法的收敛范围和最优参数，并且我们可以得到当0

Returns the value of a request parameter as a String, or null if the parameter does not exist.

获得客户端传送给服务器端的参数值，该参数由name指定，通常是表单中的参数。

The basis function of nth order trigonometric polynomial T-Bézier with shape parameter is constructed, so that the shape of the constructed curve can be adjusted by changing the parameter value.

给出了n阶带形状参数的三角多项式T-Bézier基函数。

Acquire settlement difference ±δ key parameter between inner fill column and outer fill column from practical measure, also confirm that ±δ is a compositive parameter that can reflect all influence factors of vertical soil pressure surely.

从实测中获得内外土柱沉降差±δ这一关键参数，并证实±δ的确是一个能反映垂直土压力各种影响因素的综合性参数。2。

An OUT parameter is output by your function, while an IN OUT parameter is used for both input and output.

一个OUT参数是你的函数的输出。

The influence of battery formula and technology parameter on the safety performance of mercury-free alkaline Zn/MnO2 button cell was explored. Short circuit test and overdischarge test were used to study the safety performance of battery produced with varied formula and technology parameter. The factors affecting the safety performance of battery were studied. The optimal technology parameters are confirmed as follows: capacity ratio of anode to cathode is 0.91, KOH electrolyte content is 43%, content of Zn22- dissolved in KOH electrolyte is 7%, content of ZnO added in zinc gel is 0.8%1.0%, content of electrolyte added in zinc gel is 40%42%, content of binder added in zinc gel is 1% and the mass ratio of polyacrylate sodium to polyacrylic acid is 64, content of inhibitor added in zinc gel is 0.01%.

摘 要：探讨电池配方和工艺参数对无汞扣式碱锰电池安全性能的影响，采用短路测试和过放电测试的方法研究各种工艺配方下电池的安全性能，通过实验研究了影响电池安全性能的各种因素，并确定最佳的工艺参数分别如下：负极与正极容量配比为0.91，KOH电解液浓度为43%，电解液中氧化锌的含量为7%，锌膏中的氧化锌用量为0.8%~1.0%，锌膏中电解液用量为锌粉量的40%~42%，锌膏中增稠剂用量为锌粉量的1%且其中聚丙烯酸钠与聚丙烯酸的质量比为64，锌膏中缓蚀剂用量为锌粉量的0.01%。

Based on modern optimization theory and optimal control theory, this dissertation studies some questions as follows:1. The optimization model of parameter identification of three-dimensional geologic history numerical simulation, algorithm and its applicationGeologic history numerical simulation is a basic content of basin numerical simulation, and the porosity is the major parameter in the evolution and development process of oil-bearing basin. According to the sedimentation and burial mechanism, the physical and chemical principles of oil geology, the mudstone porositys non-linear parabolic partial differential equation has been established.

本文应用现代最优化及最优控制理论，对如下一些问题进行了研究： 1、三维地史数值模拟的参数辨识优化模型、算法及应用地史模拟是盆地数值模拟的一个基础性的研究内容，地层孔隙度是含油气盆地地史演化发育过程中的重要参数，根据地层沉积埋藏机理和石油地质的物理化学原理，通过引入数学物理方程概念，建立了泥岩三维孔隙度场方程，根据问题的特点，给出了方程的定解条件，对方程的动边界也给出了处理方法，并且证明了解的存在性与惟一性，在此基础上建立了以当今实测数据为拟合准则的三维地史数值模拟的参数辨识优化模型，这是一个含有二阶偏微分方程约束的泛函极值问题。

In this paper, the monotonicity-preserving interpolation of a kind of plane parameter curve with a shape control parameter is investigated.

研究了一类带有形状可调参数的平面参数曲线的保单调插值方法。

The stick-slip region and the stable region in a parameter plane are separated by a critical parameter curve.

并在静动摩擦落差数/动摩擦系数的参数平面上划分出稳定区和粘滑运动区。

Bob Eckert has been chairman and chief executive of Mattel for eight years.

美泰董事长兼首席执行官鲍勃·埃克尔特在任已8年。

The outlook for honors and disgraces carries on and surpasses the traditional outlook for honors and disgraces theoretically, and carries on and develops the theory of construction of socialist mora...

社会主义荣辱观的提出在理论上是对传统荣辱观的一次继承和超越，是对社会主义道德建设理论的继承和发展，在实践上有利于形成良好的社会风尚。