查询词典 error model

For the solar radiation model, the error of Wu-model during the expansion of Fourier series is modified. Based on Mallat algorithm and Daubechies-type wavelets, a new wavelet transform model is presented for continuous solar radiation.

在太阳能辐射模型研究方面，对吴赣昌模型进行了修正，并基于Mallat算法和Daubechies系列小波，建立了连续太阳能辐射的小波变换模型。

Firstly, applying spectral factorization to minimize an integral square performance criterion containing tracking error and control energy, an optimal control law for the nominal model is derived on condition of control energy constraint. Then, for model uncertainty, using spectral factorization to minimize the variance of the actual system performance from the nominal performance over all frequency range, a robust controller design method is abtained, which has optimal robustness of the system nominal performance to model errors.

首先针对控制对象的标称模型应用谱分解最小化一个包含跟踪误差和控制能量在内的积分平方性能指标，导出一个控制能量约束条件下的最优控制律；然后再针对模型不确定性应用谱分解最小化实际系统性能和标称性能在整个频段上的方差，得到一个鲁棒控制器的设计方法，可使系统的标称性能对模型误差具有最优的鲁棒性。

The paper commencing with analyses of the basic property of the hydrate, structure and sort, analyzes micro kinetics, formation condition, gas hydrate formation mechanism and influencing factor in high sulfur; also proceed analysis in depth for existent hydrate prediction model; according to gas dissolving, hydrate lattice deformation, synergistic action of inhibitor, carry out analytical study for existent error between normal forecast model and physical condition; introduce key parameter theory to establish and modify prediction model of hydrate formation condition to suit for high sulfur gas reservoir and inhibitor system, analyses different kinds of prevention and cure measures to influence of hydrate; finally, through field application in high sulfur gas reservoir hydrate.

本文从分析水合物的基本性质、结构与分类出发，分析了水合物生成过程中的微观动力学、生成条件、高含硫天然气水合物生成机理以及影响因素；并对现行的水合物预测模型进行了深入剖析，根据气体溶解、水合物晶格变形、抑制剂协同作用等因素对常规预测模型与实际条件之间存在的误差进行了分析研究；通过引入关键参数理论，建立并改进了适合高含硫气藏水合物生成条件预测模型及抑制剂体系的高含硫水合物生成条件预测模型，分析了各种防治措施对水合物的影响；最后通过高含硫气藏水合物实例计算，分析了含硫化氢、二氧化碳组分的天然气与常规气体对水合物生成条件的影响，并对各种水合物防治措施进行了实例计算。

On the basis of common GM(1,1) model and by means of establishing residual error periodic extensional model, the authors extract predominant period and reconstruct a new data sequence; then after superposing the values of the same time in different period, a ray-periodic extensional combinatorial model is built.

提出了灰色–周期外延组合模型，即在一般灰色模型GM(1，1)的基础上建立残差周期外延模型，并提取优势周期以重新构造新的数据序列，再将不同周期同一时刻的值叠加。

The first is the unique existence condition of model root, and some relative concepts such as the amount of knowledge utility, etc. The second is the relationship between measuring accuracy and model reliability, which is analyzed from the view of error theory by introducing model uncertainty concept.

课题主要从软测量模型结构、软测量统计建模、软测量系统滤波三个方面进行深入的理论研究，并对软测量系统的实现技术进行仿真实验研究。

Based on State Space Model and Kalman Filtering, this paper set up a Time-varying Parameter Model and Error Correction Model under the consideration of aggregate demand to analyze the effect caused by FDI on Chinas economic growth.

本文基于状态空间模型和卡尔曼滤波建立了变参数模型和误差修正模型，从总需求的角度出发，动态地研究了外商直接投资对我国经济总量、固定资产投资、进出口贸易等方面我国经济增长的影响，并且的到了以下主要结论以及政策建议。

The offered simples can not completely accorder with the assessment model, so the error was regarded as the object function, and the optimum probability assessment model was presented. In order to optimize the model's distribution parameter, the improved genetic algorithm was adopted.

对原始数据在评估模型中产生的误差作为目标函数，建立概率评估优化模型并采用改进遗传算法对分布参数进行优化计算。

The results show that NPP is larger in June and July than other growth periods, grass LAI and NPP change rapidly from May to June. Estimated error of 44 cases by the biomass model is less than 20%, which show that the biomass model is very good , the model can describe growing status. Photosynthesis and respiration are different because of different type grass , three types grass are more adaptive to desert environment and the biomass are also big, the grass types include Alhagi sparsifolia, Lycium ruthenicum and Reaumuria songarica. The grass biomass is influenced by many factors such as grass type, total cover and plant height et al.

结果表明，2005年牧草生长期内NPP的变化基本是6、7月份最大，其它月份较小，5～6月份是牧草叶面积变化比较大的时期，也是NPP变化比较显著的时期；生物量模型估算得到的44个样本的生物量误差基本都小于20%，说明模型能够反映牧草的实际生长状况；不同荒漠牧草对光的利用能力和对CO2同化能力有很大差异，骆驼刺、红砂、黑果枸杞是荒漠牧草生物量较大的牧草类型；牧草类型、牧草盖度以及平均高度是造成不同牧草产量相差较大的重要原因。

In the field of spaceborne remote sensing, a geometric collinearity equation of pushbroom sensor with the Kepler parameters of the satellite orbit and the attitudes of sensor has been developed. Testing the sensor model on a SPOT-5 imagery, the planimetric accuracy of object positioning is 83.392m on the ground. According to the orbital dynamical model and the kinematics model of satellite attitude, an algorithm of extrapolative location is developed. Testing the algorithm on CBERS-2 high resolution satellite imageries of central China, when the depth of extrapolation is 300km, the planimetric precision is 53.555m including the measurement errors as well as the modeling error over than the 568m which is the planimetric precision of systematic rectification.

航天遥感方面，利用6个卫星轨道开普勒参数和3个传感器姿态建立了推扫式卫星遥感影像的严格构像方程，经对一景SPOT-5影像实施无地面控制对地目标定位获得了83.392m的平面精度；根据遥感卫星的运动规律，提出了卫星轨道参数、传感器姿态和扫描侧视角的外推算法，用于资源二号卫星影像的外推对地目标定位，当外推深度达300km时，目标定位精度不低于50m。

The electricity price curve in electricity market possesses the features of multicycle and strong fluctuation, whereas there is evident error in the prediction by grey GM(1,1) model with exponential growth, for this reason the authors propose a period residual modification based grey price forecasting model, which not only inherits the advantages of grey model but also makes the forecasting curve fluctuated by means of smooth processing of original data, improvement of initial condition and period residual modification.

电力市场中的电价曲线具有多周期、跳跃等特性，而呈指数增长的灰色GM(1，1)模型预测误差较大，为此，文章提出了基于残差周期修正的灰色电价预测模型。

The witness also told the jury at the Royal Courts of Justice in London that he saw a paparazzo fighting with a member of the public who was trying to stop him taking pictures in the minutes before the emergency services arrived.

他还告诉在伦敦皇家法庭的陪审团，在急救服务到来之前，他当时看见一个狗仔队正和一群阻止他拍照的人打架。

The entire N／C program on a tape is made up of an accumulation of these successive data blocks.

纸带上的整个数控程序由这些连续数据单元连接而成。