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统计建模     
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  statistical modeling
     Application of Adaptive Genetic BP Neural Network Model on Statistical Modeling
     自适应遗传BP神经网络模型在统计建模中的应用
短句来源
     Application of Genetic Programming on Statistical Modeling
     遗传程序设计在统计建模中的应用
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     The bidirectional reflectance distribution function (BRDF) is simplefied and modelled according to the principles of simple geometry optics and statistical modeling.
     首先利用简单几何光学与概率统计的原理 ,根据粗糙面激光散射特性 ,对双向反射分布函数进行了简化和数学统计建模
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     Statistical Modeling and Monitoring Approach Research for Industrial Process
     工业过程统计建模与监控方法研究
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     Statistical Modeling and Online Monitoring for Batch Processes
     间歇过程的统计建模与在线监测
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  statistical modelling
     Graphical Model and Its Applications in Statistical Modelling
     图模型及其在统计建模中的应用
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     THE BASIC APPROACH TO STATISTICAL MODELLING
     统计建模的基本方法
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     STATISTICAL MODELLING AND ANALYSIS OF RELATIVE DISCHARGE RATIOS IN ELECTRICAL DISCHARGE MACHINING PROCESS
     电火花加工过程相对放电率统计建模及分析
短句来源
     The establishment model usually has two means, namely mechanism modelling and statistical modelling.
     建立模型通常有两种办法,即机理建模和统计建模
短句来源
  statistics modeling
     Aiming at the issues that the soft-sensor models have only narrow working scopes and are difficult to reflect material property changes in the petroleum industry product quality the soft-sensor method is discussed based on physical analysis and statistics modeling.
     针对石油化工生产过程基于统计模型的产品质量软测量中普遍存在的软测量模型适用工作范围小、难以反映进料原料性质变化的问题,探讨和应用了机理分析和统计建模相结合的软测量方法。
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     Seemingly unrelated regression model are multiple regression equation systems which can be abbreviate as SUR. It differs from the multivariate regressions model in that it allows difference explanatory variables between difference equations. This feature let great flexibility to statistics modeling.
     似乎不相关回归模型(seemingly unrelated regressions model SUR)是由多个回归方程组成的方程组,它与多元回归模型(multivariate regression model)的区别在于允许各方程存在不同的自变量,这样的特性给统计建模带来很大的灵活性。
短句来源
     The algorithm structure, implement procedure and application field etc of the temporal difference algorithms including the adjacent frame difference mean algorithm and three frame difference algorithm and the background statistics modeling algorithms including background subtraction and Gaussian Mixture Model are particularly discussed in this paper.
     文中分别针对瞬时差分法中的相邻帧差分累加平均法、三帧差分法和背景建模中的背景减除法、基于高斯分布的统计建模方法的算法依据、实现步骤、适用场合等方面进行了细致阐述,并结合多组仿真实验结果比较了几种方法的优、缺点。
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  statistic modeling
     Statistic Modeling of Static Magnetic Field for Armored Vehicle
     装甲车静磁场特性统计建模
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     By comparing the errors-of-fit produced by both the new model and the conventional target models, we conclude that the new nonparametric method of statistic modeling is superior, for it makes the statistic modeling of radar target easier and more exact.
     通过与传统统计模型比较认为,这种新的统计模型非参数法是一种更准确的雷达目标散射截面的建模方法,从而较好地解决了雷达目标统计建模问题。
短句来源
     This paper based on the present status of domestic and outside equipment and productionof rubber industry, considered the process of rubber mixing technology, used statistic modeling, NN andexpert system and advanced calculation technology to realize the intelligent control of rubber mixing.
     本文基于国内外橡胶工业设备和生产的现状,从橡胶密炼技术的工艺出发,利用统计建模、神经网络和专家系统等多项先进计算技术,实现了橡胶密炼的智能化控制。
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     Hidden Markov Models (HMM) is a kind of statistic modeling tool been used successfully in speech recognition. The paper brings the technology of HMM into the study of filtering noise in digital discrete signal first and brings up HMM averaging method. It proves efficient to use HMM in the work after computer rebuilding simulations of noise-adding harmonic wave' rectangular wave.
     隐Markov模型(HMM)是在语音识别中得到成功应用的一种统计建模工具.该研究首次将 HMM技术引人数字的离散信号滤噪研究并提出了HMM综合平均法,经对加噪谐波信号、方波信号、 斜波信号的计算机重建仿真实验后,表明利用HMM进行此项工作有着比较好的效果。
短句来源
     Based on the strong relationship of the three variables (speed, direction and height) determining aircraft moving conditions, This paper deals with the statistic modeling of aircraft perturbation motion in the method of multidimensional self-recurrence in time sequences and proves through instances that the method presented is feasible and effective.
     由于确定飞机状态的三个量航速、航向、高度三者具有强相关性,采用了时间序列中的多维自回归方法对飞机扰动进行统计建模,以实例验证了所提方法是可行和有效的.
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  statistical modeling
The results of analytical and statistical modeling of the stability of the amplitude-frequency characteristics are presented.
      
The problem of strong evaporation of matter filling periodic rectangular semi-infinite channels in a porous two-dimensional body is solved by a method of direct statistical modeling.
      
Certain aspects of the parallelization of problems of the kinetic theory of gases solvable by direct statistical modeling on multiprocessor computers are discussed.
      
The best developed method for solving the complete Boltzmann equation without the a priori assumptions concerning the form of the distribution functions inherent in moment methods is direct statistical modeling.
      
The problem of steady supersonic condensation of a monatomic gas on a plane evaporating surface is solved in the Knudsen layer by the direct statistical modeling method.
      
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  statistical modelling
Various multivariate statistical modelling techniques [latent class analysis (LCA), longitudinal LCA] were utilised to define the key features of PFS and describe its longitudinal characteristics.
      
Although LPL genotype did not significantly predict LV growth with ΔSBP in statistical modelling (LPL, P=0.14; ΔSBP, P=0.06), regression analysis indicated that LPL S447X genotype effect on ΔSBP accounted for only 20% of the effect on LV growth.
      
In differential GPS, once the observations have been screened for strong biases such as cycle slips, multipath, etc., the statistical modelling of the problem may still be unsatisfactory for some receiver-satellite pairs at certain epochs.
      
Statistical modelling using generalised additive models (GAM) revealed variations in activity patterns for two species.
      
Optimization of batch pyrite bioleaching with Sulfolobus acidocaldarius was performed using statistical modelling and experimental design.
      
更多          
  statistic modeling
Statistic modeling of the creep behavior of metal matrix composites based on finite element analysis
      
The software statistic modeling capability provides realistic yield analysis and optimization.
      
  其他


In this paper, we point out the drawbacks of conventional statistic target models used in radar target modeling. It is usually difficult for us to approximate a real target by a conventional target model that has an analytical probability density function (PDF) expression, because there are very few parameters which can be used to approximate the real target's PDF by a theoretic target model's one. We suggest a new method of statistic modeling, in which the first nth central moments of real target's radar cross...

In this paper, we point out the drawbacks of conventional statistic target models used in radar target modeling. It is usually difficult for us to approximate a real target by a conventional target model that has an analytical probability density function (PDF) expression, because there are very few parameters which can be used to approximate the real target's PDF by a theoretic target model's one. We suggest a new method of statistic modeling, in which the first nth central moments of real target's radar cross section (RCS) are used to characterize the target, and the Legendre orthogonal polynomials are used to reconstruct the PDF of the target's RCS. The relationship between the coefficients of Legendre polynomials and the central moments of RCS are deduced mathematically. Through a practical computation example, the error-of-fit is shown as a function of the orders of Legendre coefficients. By comparing the errors-of-fit produced by both the new model and the conventional target models, we conclude that the new nonparametric method of statistic modeling is superior, for it makes the statistic modeling of radar target easier and more exact.

本文指出了传统的雷达目标统计模型的不足,由于统计特征参数较少,因此很难精确地拟合实际目标散射截面数据.本文提出了一种新的统计模型,它以统计量的各阶中心矩来表征目标,然后用Legendre正交多项式系来再现其概率密度函数。文中推导了Legendre多项式系数与各阶中心矩之间的数学关系式。并通过实际例子计算得到多项式系数多少与拟合误差的关系曲线。通过与传统统计模型比较认为,这种新的统计模型非参数法是一种更准确的雷达目标散射截面的建模方法,从而较好地解决了雷达目标统计建模问题。

The present paper is a report on the research works completed during last five years by myself and my Ph. D. students at Peking University in connection with the problems in statistical time series and spatial series modelling. This paper is in two parts. In the first part, we shall give new results of estimating the orders and parameters of the stationary and monstationary ARMA models (Including stationary ARMA, ARUMA and the general ARMA models). The error terms are supposed to satisfy the martingale difference...

The present paper is a report on the research works completed during last five years by myself and my Ph. D. students at Peking University in connection with the problems in statistical time series and spatial series modelling. This paper is in two parts. In the first part, we shall give new results of estimating the orders and parameters of the stationary and monstationary ARMA models (Including stationary ARMA, ARUMA and the general ARMA models). The error terms are supposed to satisfy the martingale difference conditions which are weaker and more natural than supposing them to be i. i. d.. In the second part of this paper, we shall give new results about statistical spatial series modelling. Characterization of twodimensional ARMA models are given. A specific two-dimensional AR model(i. e. the quadrant Marker AR model) is found to be the exact two-dimensional counterpart of the classical onedimensional AR model. For the quadrant Markov AR model, we also give procedures of estimating their orders and parameters.

本文介绍了作者和他的博士研究生于近五年内,在时间序列与时空序列的统计建模方面所完成的研究工作。文章包含两个部分:第一部分将给出平稳与非平稳的ARMA模型(包括平稳ARMA,ARUMA与一般ARMA模型)的阶与参数估计的新结果,我们假设模型的噪声项满足鞅差条件,这比要求它们是i.i.d要弱,而且合理。第二部分给出了二维ARMA模型的谱鉴别,对于一类特殊的二维AR模型(即所谓的象限马氏模型,它们恰好就是熟知的一维马氏AR模型在二维情形的相配模型。)给出了它的阶与参数的强相合估计与重对数收敛速度。

Based on the quadratic regression test and investigation of dynamic development of maize in experimental plot, the best farming measures for one ton per mu maize output were designed by means of statistical model and systematic simulation, which included density of 5.64~6.24 kiloplant/mu, 28.20~33.85kg/mu of topdressing pwre N per mu, P2O6 12.39~14.22kg/mu, K2O 23.16~24.80kg/mu, the plant highness and development of leaf area were shown to give the reason for field management, the analysis of the factors concerning...

Based on the quadratic regression test and investigation of dynamic development of maize in experimental plot, the best farming measures for one ton per mu maize output were designed by means of statistical model and systematic simulation, which included density of 5.64~6.24 kiloplant/mu, 28.20~33.85kg/mu of topdressing pwre N per mu, P2O6 12.39~14.22kg/mu, K2O 23.16~24.80kg/mu, the plant highness and development of leaf area were shown to give the reason for field management, the analysis of the factors concerning the maize output has shown, to obtain higher yield, the number of ear and grain should be stressed on the basis of reasonable plant density as well as kilograin. weight.

通过回归设计试验和夏玉米高产攻关田生育动态调查,经统计建模和系统模拟,优选出吨粮高产玉米农艺措施决策方案为:密度5.64~6.24千株/亩,追纯氮28.20~33.85kg/亩,P_2O_6 12.39~14.22kg/亩,K_2O 23.16~24.80kg/亩;并明确了高产玉米的株高及叶面积增长动态,从而为田间管理提供了依据.对产量构成因索的偏相关分析启示,要进一步夺取高产,应在合理密植的基础上,以力争穗粒数兼顾千粒重为主攻方向.

 
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