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The spectrum characteristics of the phase truncation error and amplitude quantization error are analyzed by the method of Fourier series. 文章最后还简单介绍了几种改善杂散误差的方法。
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。
This paper analyzes the spectral characteristic of the synthesized waveform by use of the Fourier Series,and discusses the spurious spectrum of the phase truncation errors. 本文用傅里叶级数的方法分析了合成波形的频谱特性，并对由于相位截断引起的杂散谱作了讨论。
A Method for Eliminating the Phase Truncation Error of the DDS 一种降低DDS相位截断误差的方法
phase truncation error 相位截断误差
It retains all of the advantage of(3-50a)and(3-50b)except for a somewhat increased truncation error. 除了略微增加截断误差外,它保持式(3-50a)和(3-50b)的所有优点。
The minimum distance method is used to match SVD feature extraction and the truncation error method is for PCA. 针对奇异值分解的特征提取采用的是最小距离分类法,针对主成分分析的特征提取采用的是截断误差分类法。
The local truncation error,stable conditions and positivity condition,for all these difference schemes areeasily given. 简便地给出了全部差分格式的局部截断误差，稳定性条件和正性条件。
This paper mainly analyzes the phase truncation and the spurious signal due to the phase truncation, and puts forward a way of calculate the number of spurs and S/N. 重点分析了相位截断误差以及由相位截断引起的杂散频率分量，提出了计算这一杂散频率分量个数及信噪比的方法。
Block-Iterative Method of Solving the Nonhydrostatic Pressure in Terrain-Following Coordinates: Two-Level Pressure and Truncation Error Analysis. 在地形坐标中求解非流体静力平衡气压的块迭代方法:两层气压和截断误差分析。
Abstract: Truncation error occurs in process life cycle assessment (PLCA), which makes underestimation of assessment results. 摘要：常规过程式生命周期评估方法在计算中会截断误差，导致评估结果被低估。
The disadvantages of DDS (direct digital frequency synthesizer) are rather low output frequency and a large set of the spurious signals, and one reason of the spurious signals is phase truncation. 摘要直接数字频率合成(DDS)的缺点在于输出频率低和存在大量的杂散信号，而杂散信号产生的原因之一就是相位截断。
Finally, based on square grid we analyze the truncation error of various iterative forms of Laplace equation which are determined by various partition patterns. 最后在正方形网格剖分情形下 ,以拉普拉斯方程为例 ,分析了各剖分方式所确定的迭代格式的截断误差
The truncation error in calculating the harmonic loss is analysed and a method is offered to determine how many times harmonics must be calculated at least. 文中还对谐波损耗计算的截断误差进行了理论分析，确定了谐波损耗所需计算的最少谐波次数。
Considering this problem,a method of direct constructing disjoint paths is adopted,at the same time network simplification technology and truncation error theory is combined. 针对这一问题,采用直接构造不交化通路集的方法,结合网络简化技术和截断误差理论,提出了一种快速确定大型通风网络可靠度的算法。
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。
The software synchronism sampling method based on real-time parameter self-optimizing minishes period truncation error, and the measurement accuracy is improved. 基于实时参数自寻优的软件同步采样，有效地减小了周期截断误差，提高了测量准确度；
SADI method and a spline method of fractional steps in each coordinate direction as well as truncation errors and its stability are briefly reviewed. 简要评述了SADI方法和样条方法在每一坐标方向的分步计算方法、截断误差和稳定性。
The comparison between analytical solution and uncorrected solution shows that uncorrected truncation errors can not be ignored. 通过解析解与没有修正的差分解进行对比，结果表明，没有修正的截断误差是不能忽略的。
SADI method and a spline method of fractional steps in each coordinate direction as well as truncation errors and... 给出了处理混合边界条件的一般公式。最后简要讨论了样条近似引起的数值弥散和耗散。