查询词典 fractional error

A new numerical method for the fractional integral that only stores parthistory data is presented,and its discretization error is estimated.

提出了一种只需要存储部分历史数据的分数积分的数值计算方法，并给出了误差估计。

For the diffractive optical element realizing beam shaping in the fractional Fourier transform domain,the transform matrix calculated by the discrete sampling points was compared with that calculated by the Fresnel integral,and the discretization error of the intensity distribution on the output plane was qualitatively obtained.

针对分数傅里叶变换衍射光学光束整形器件，比较了按离散点与按菲涅耳积分计算得到的变换矩阵间的差距，从中分析得出按离散点计算的变换矩阵引入的离散化误差与分数傅里叶变换系统参数的关系。

The method can beused to solve the integro-differential equation included fractional integral orfractional derivative in a long history and the difficulty of storing all history data isovercome and the error can be controlled.Two numerical examples are presented.

利用该方法可对包含分数积分和微分的积分-微分方程进行较长时间的数值模拟，克服了存储全部历史数据的困难，并能对计算误差进行控制。

In Chapter 4, we consider more complex fractional nonlinear differential equation,also using the high order approximation presented by Lubich to construct correspond-ing numerical scheme and giving the error analysis of the algorithms.

在第四章中，进一步的考虑更复杂的非线性分数阶常微分方程，同样利用的是Lubich提出分数阶导数的高阶近似，构造相应的数值格式，并给出这一算法的误差分析，即相容性，收敛性和稳定性的证明。

Further analysis shows, the average fractional error between the related equation and the actual experimental date is 1.5% in 20℃. The related equation based on dimensional analysis can properly coincide with the actual result.

通过分析比较发现，20℃时关联式相对於实测数据的平均相对误差仅为1.5%，由此证明利用量纲分析得出的膜通量衰减关联式较好地反映了实验结果。

One position control system is introduced as the objective controlled by FOC. Based on Mittag-Leffler function, the fractional order control system with full memory length is adopted as evaluation criterion, and an approximation performance function of discretization methods is proposed. Analyzing the time domain error and approximation performance, the investigation to various discretization methods is carried out comparatively in detail.

引入一个位置控制系统作为分数阶控制对象，将Mittag-Leffler函数的全记忆长度分数阶控制系统作为评估基准，提出了一种离散算法的近似性能函数，通过时域误差分析以及近似性能分析，对比研究了分数阶微积分算子的数字实现方法。

The substitution model of RBF neural network was made respectively by 3 different test functions. The error analyses indicate that the fractional steps experiment design method is very practical for the substitution model needed large scale test sample points.

对3个测试函数建立RBF神经网络替代模型，其误差分析表明，分步试验设计方法对于需要大规模试验样本点的替代模型是非常实用的。

Comparing these deviation values and the colligate error controllable limit of the ferrography technical and analysis the amount of deviation, the method of fractional precipitation is feasible in actual operation .

通过比较这些偏差值与铁谱技术的综合误差控制限度，并分析误差原因，来判定铁谱技术中磨粒分步沉积方法在实际操作中的可行性。

According to the monotonically increasing match criteria around the location of the optimal motion vector a fast fractional motion estimation algorithm based on the group error is presented.

根据匹配准则的目标函数在最优运动矢量的附近都是单调递增这一假设，提出一种基于分组误差的快速分数像素运动估计算法。

In fact, this simple scale transformation of space data sometimes exists large error. Based on above view, we adopt the method that combining field data and multi-scale remotely sensed data to measure vegetation fractional coverage.

该模型与目视解译法、目视估测法、网格法和监督分类法等常用的估测植被盖度的方法相比，无论在处理数码相片的效率上，还是在提取植被盖度信息的精度上都有很大的改进。

Yet, Edith says, there was always money in the bank.

但是Edith说，她的银行户口里面总是有钱。

We have created a series of files that resolve this problem--one for each day of the 40 days of purpose.

我们制作一系列的档案去解决这问题---一个为标竿40天中的每一天。