This dynamic filter on the fact table reduces the number of rows used in the probe phase of the actual hash joins.
事实表上的动态过滤减少了实际散列连接探测阶段使用的行数。
In addition, the thesis analyzes the influence of the filter structure and parameters on the output DC voltage ripple and the shape of phase currents, as well as harmonics of phase currents.
另外，还对滤波器的结构和参数对输出直流电压脉动和发电机相电流波形的影响及相电流谐波进行了仿真分析。
In the modern electrical system, FIR digital filter is widely favorable for many applications due to its well linear phase characteristics.
FIR数字滤波器以其良好的线性相位特性被广泛使用于现代电子系统中。
A novel single - phase parallel hybrid power filter is presented in this paper, which can eliminate drawbacks of LC passive filter and the conventional voltage source parallel hybrid power filter.
本文针对LC无源滤波器和传统的电压源型并联混合电力滤波器的缺点，提出了一种新型的并联混合电力滤波器。
The effect of amplitude and phase error on the performance of receiver is discussed in this paper, and a method of digital correction based on FIR filter is proposed.
本文仔细分析了幅相误差对接收机性能的影响，提出了基于FIR滤波的一种数字域校正的方法。
Due to the frequency pulling of FLL, the passband of the filter in PLL can be made very narrow to suppress the noise, and the PLL can lock carrier's phase with high accuracy.
由于有锁频环的频率牵引，锁相环路滤波器可以设计得很窄，具有很好的抑噪性能，满足精确跟踪载波相位的要求。
The linear and the minimum phase filters are two kinds of filter equipments used in the digital seismic observation.
线性相位滤波和最小相位滤波是数字地震观测中经常都要遇到的两类滤波器。
When using Kalman Filter to track a target, estimation of the initial state of the target is an important factor influencing tracking precision in the initial phase.
采用卡尔曼滤波器对目标进行跟踪时，目标初始状态估计是影响初始阶段跟踪精度的一个重要原因。
In this paper we study linear phase maximally decimated FIR cosine modulated filter banks, in which each filter has linear phase and is obtained by modulating the prototype filter by cosine sequences.
现研究了一种具有线性相位的最大抽取FIR余弦调制滤波器组，该滤波器组中每一个滤波器都具有线性相位，且由原型滤波器经余弦序列调制得到。
In this article, PLL theory, design of loop filter and phase noise theory are introduced at first.
本文先介绍了锁相环的工作原理，环路滤波器的设计并对相位噪声的理论进行了阐述。
To measure phase accurately in the presence of harmonics for both noisy input signals, a technique based adaptive bandpass filter (ABF) and the method of interchanging signal channel is presented.
为了测量受噪声和谐波干扰的两个信号间的相位差，基于自适应带通滤波器(abf)和测量信道交换技术，提出了一种新的测量方法。
If the phase and frequency changes in the relationship is linear, then the filter would signal delay is only a constant number.
如果相位与频率的变化关系是线性的，那么滤波器仅仅会使信号延时一个常数量。
In this thesis we propose an alternative method to increase the axial resolution of OCT by combining coherence gating with superresolution through an appropriate phase filter.
本文提出一种将光学超分辨术与OCT相干门有机结合的方法来提高OCT的轴向分辨率。
The Principle and design methods for linear phase digital filter with optimization design were presented in this paper.
本文提出并详细说明了用最优化方法设计线性相位数字滤波器的原理和方法。
FIR filter in the guarantee range characteristics to meet technical requirements at the same time, very easy to do have the strict linear phase characteristic.
fir滤波器在保证幅度特性满足技术要求的同时，很容易做到有严格的线性相位特性。
In this paper, two types of main power circuits and their control methods are introduced when constructing active power filter in three phase four wire system.
本文介绍了在实现三相四线制有源电力滤波器时所采用的两种不同的主电路结构及其控制方法。
In addition, LC noise filter is added in the tail current source to lower phase noise further more.
另外，在尾电流源处加入电感电容滤波，进一步降低相位噪声。
We propose the quadratic constrained formulas for the design of linear phase cosine modulated paraunitary filter banks given in references .
本文提出了一种线性相位精确重建余弦调制滤波器组的二次型约束设计公式。
As a new filtering device used in single phase circuit, hybrid type series active power filter is a combined system of shunt passive filter and series active filter.
串联混合型单相电力有源滤波器是串联有源滤波器与并联无源滤波器组合而成的单相电路新型滤波装置。
And the non-inverted conversion is obtained by large filter detuning, which is used to extract the frequency chirps, and in this condition the cross phase modulation (XPM) is dominant.
当滤波器失谐量较大时，得到同相波长转换结果，此时交叉相位调制(XPM)占主导作用，而滤波器起到提取啁啾信息的作用。
In this paper, a three phase hybrid power filter composed of a Thyristor Switched filter (TSF) and an Active power filter (APF) is introduced.
介绍了由晶闸管投切滤波器和有源滤波器组合构成的一种三相混合电力滤波器。
Phase-matched filter is applied to extract phase of fundamental surface wave, and then time-variable filter is used to correct amplitude spectrum in order to isolate fundamental mode signs.
使用相匹配滤波技术提取基阶面波振型的相位，然后再利用时变滤波进行振幅谱校正，以此分离出基阶振型面波信号。
Phase-shifted full-bridge PWM converters work in discontinuous current mode (DCM), when the current of out-put filter inductor is discontinuous in one switching period.
当输出滤波电感的电流在一个周期内不连续时，移相全桥PWM变换器就工作在电流断续模式（DCM）。
A new method for designing linear phase FIR digital filter with fixed-point coefficients based on the peak-constrained least-squares criterion is proposed in this paper.
基于峰值约束最小平方优化标准，提出了一种用于设计线性相位定点系数FIR数字滤波器的新方法。
Based on the delay-coordinate reconstruction and bilinear expressions in the phase space of a chaotic system, a bilinear adaptive filter was designed to predict low-dimensional chaotic time series.
基于混沌动力系统相空间的延迟坐标重构和双线性表达式，设计了预测混沌时间序列的双线性自适应预测滤波器。
This group-delay equalizer can follow any type of HTS microstrip filter in order to reduce phase distortion, enhance group-delay performance, and improve communication quality.
该群时延均衡器能与不同类型超导微带滤波器级联，实现相位均衡，减小相位失真，改善接收机前端信号群时延特性，提高通信质量。
The operating status of three-phase three-wire HAPF(Hybrid Active Power Filter) in harmonic suppression and reactive power compensation for variable-frequency motor are introduced.
介绍了三相三线制混合型有源电力滤波器在变频调速电动机谐波治理和无功补偿方面的运行情况。
In general, the filter will produce a phase shift and frequency-related.
一般而言，滤波器会产生一个和频率有关的相位偏移。
According to the equivalent circuit model of non-linear load, a detecting approach of harmonic current in single-phase circuit based on fast iterative algorithm in active power filter is proposed.
根据非线性负载的等效电路模型，提出了一种基于快速跟踪算法的有源电力滤波器单相电路谐波电流检测方法。
For a confocal microscope with a finite-sized detector, the improvement in axial resolution by a phase-only filter with two zones was experimentally investigated.
针对采用有限大小探测器的共焦显微系统，利用两区相位型滤波器提高系统的纵向分辨率。
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