• When considered the far field test, the sample plane cannot do infinitely great, the paper has analyzed the truncation error, and proposed the error correction method.

    考虑到远场测试时,取样平面不可能做的无限大,在对误差进行分析的基础上,给出了误差修正方法。

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  • This paper introduces the theory of the phase-locked loop (PLL) and the direct digital synthesis (DDS), a method to improve the precision of DDS and reduce its phase truncation error is also given.

    介绍了锁相环(PLL)技术和直接数字式频率合成(DDS)技术的基本工作原理,给出了一种提高DDS输出频率精度及减小其相位截断误差的方法。

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  • Taking one-dimensional diffusing equation as the object of study, a method of undetermined coefficients was given. Then gave two examples and analyzed their stability and truncation error.

    针对一维扩散方程,给出一种新型差分格式的待定系数法,并以两种新型差分格式为例进行稳定性和截断误差分析。

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  • This algorithm adjusts the step-size appropriately according to the presupposed precision and the local truncation error of each step.

    该算法根据每步计算中局部截断误差和精度的要求,合理调整步长大小。

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  • It is different from traditional concept that the concept dynamic roughness includes influence of model error, truncation error, observation error and so on.

    此时的糙率与传统的概念有明显的不同,它包含了模型误差,截断误差,观测误差等各方面的综合影响。

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  • In this paper, the additive mass technique is also proposed for correcting the truncation error of higher order modes without using the residual compliance matrix.

    本文还提出了一种附加质量法来修正高阶模态的截尾误差而不采用剩余柔度矩阵,从而使本法能简易地获得高精度。

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  • Sampling plane truncation error is a very important factor of affecting the result in time domain near field measurement.

    采样面截断误差是影响近场测试结果的一个很重要的因素。

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  • According to mirror image principle. a simple and practical formula for numerical match and a dependence for estimating truncation error of summing up infinity terms are proposed out.

    文章根据镜像原理,提出了简单实用的数值拟合公式与求无穷和项截断误差估计关系式。

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  • The scheme exhibits global second order accuracy, despite its first order local truncation error.

    这种差分格式虽然只有一阶的局部截断误差,但实际具有二阶的收敛性。

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  • The time-frequency domain sampling characteristics of periodic signal, the truncation error and the spectrum leakage error caused by asynchronous sampling are discussed in detail.

    讨论了周期信号取样的时域频域特性、非同步取样引起的截断误差和频谱泄漏误差。

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  • This paper presents an optimization of centered finite-difference operator based on the principle of constrained cost function, which can reduce the truncation error to minimum.

    作者根据约束性代价函数原理提出了能够使得截断误差最小化的中心差分优化算子。

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  • Considering the incompleteness of measured structural mode shapes, the practical complete modal space theory is used to eliminate the influence of modal truncation error.

    考虑到所测的结构模态是不完备的,应用完备模态空间理论将未测的结构高阶模态用等效高阶模态来代替从而消除模态截断误差的影响。

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  • Then, at the basis of the relation of truncation error and related coefficients, a real-time RK4 formula with maximum stability region and minimum truncation error is deduced.

    然后,根据截断误差与相关系数的关系,导出了具有最大稳定域最小截断误差的实时RK4公式。

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  • But all their precisions are limit to one-order truncation error, and make severe accumulate error on discrete models.

    这些方法的精度都局限在一阶截断误差,在离散的网格上有严重的累积误差。

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  • In addition, to improve the usability of the results, a threshold modification method was proposed to reduce truncation error and propagation error in mining process.

    另外,为了提高挖掘结果的可用性,设计了一个阈值修正的策略来减小挖掘过程中的截断误差和传播误差。

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  • The spectrum characteristics of the phase truncation error and amplitude quantization error are analyzed by the method of Fourier series.

    介绍了直接数字频率合成技术以及分析其杂散误差,对相位截断误差和幅度量化误差进行了傅立叶级数分析研究。

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  • Thetormulae of truncation error have been derived mathematically.

    从数学上推导了截断误差的计算公式;

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  • The results of computer simulation show that the truncation error caused by finite scanning plane can be effect…

    计算机模拟结果表明,通过对近场进行加余弦窗的数据处理能够有效地减小有限扫描面截断误差。

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  • We therefore have a truncation error of 0.01.

    因此,我们有一个截断误差为0.01。

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  • The analytical truncation error formulas of a partial differential equation are given for the upstream scheme and the centered difference scheme, respectively.

    然后引入参考解的办法, 用来分离更为一般的微分方程求解过程中的截断误差和舍入误差。

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  • The appropriate selections of the moving interval, truncation error and the point of onset is to minimize the computer storage and the number of operations required.

    为降低运算量和虚模型中的存贮,应适当选取移动间隔,截断误差和移动起点。

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  • The phase error signal due to the phase truncation is analyzed, and the regularity of its spectral lines is obtained.

    对相位舍位误差信号作了分析,得到了其频谱分布的规律。

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  • This paper introduced the classification of numerical calculation errors, and used math expressions as examples to illustrate truncation error.

    介绍了数值计算中的误差类别,用数学表达式举例,说明了截断误差,根据IEEE754标准用数学表达式说明了舍入误差;

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  • In fact, any numerical discretization method has truncation error and there's no need to treat the difference equations as equality constraint.

    事实上,由于任何数值离散方法均存在截断误差,将其作为等式约束是没有必要的。

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  • In the early modal synthesis techniques, the main cause of computation error comes from the truncation of higher order natural vibration modes.

    在早期的模态综合法中,引起计算误差的主要原因是由于截去了高阶模态。

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  • In the early modal synthesis techniques, the main cause of computation error comes from the truncation of higher order natural vibration modes.

    在早期的模态综合法中,引起计算误差的主要原因是由于截去了高阶模态。

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