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数据窗
相关语句
  data window
     Dynamic data window of PowerBuilder application and development system
     PowerBuilder应用开发系统中的动态数据窗技术
短句来源
     ORTHOGONAL, FILTER DESIGN MOTHED BASED ON SHORT DATA WINDOW
     基于短数据窗正交滤波器的设计方法
短句来源
     The highest resolution of the conventional spectrum estimation is not beyond the limit of 1/T, where T is the length of the data window.
     传统谱估计法的分辨率最好也不超过1/T,其中T为数据窗长度。
短句来源
     The data window which ANN needs in the learning of BP algorithm is the shortest.
     ANN在BP算法的学习中,需用的数据窗最短。
短句来源
     An imaginary threshold(Yα) is set to k times of the extreme value in each data window(Ymax) and compared with each sampling data.
     在每个数据窗内找到一个极大值Ymax,设假想门槛Yα,使Yα=kYmax。
短句来源
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  data view window
     The key techniques in the development of logic analyzer,a product type project taken by the authors,are discussed,of which the concept and the theory of a virtual instrument in system design,the high-speed data acquisition technique based on the devices with lower operation speed,the data view window positioning technique based on the software design,and the design for testability concerning its debugging and production are expatiated emphatically.
     就笔者所承担型号项目“逻辑分析仪”的开发研制中的若干关键技术进行论述 ,着重阐述其系统设计的虚拟仪器概念与原理、基于低速器件的高速数据采集技术、基于软件设计的数据窗定位技术、以及基于系统调试与产品生产考虑的可测性设计。
短句来源
     The key techniques in the development of logic analyzer,a product type project taken by the authors, are discussed,of which the concept and the theory of a virtual instrument in system design,the high-speed data acquisition technique based on the devices with lower operation speed,the data view window positioning technique based on the software design, and the design for testability concerning its debugging and production are expatiated emphatically.
     就笔者所承担型号项目“逻辑分析仪”的开发研制中的若干关键技术进行论述,着重阐述其系统设计的虚拟仪器概念与原理、基于低速器件的高速数据采集技术、基于软件设计的数据窗定位技术、以及基于系统调试与产品生产考虑的可测性设计。
  “数据窗”译为未确定词的双语例句
     If the noise lever is not lower than the certain value after 15ms for 3.3ms, the differential equation based algorithm will be automatically put into caculation, and the window length is fixed at 15ms.
     如果在故障后15ms之内,噪声水平未减小到整定值以下并持续3.3ms,解微分方程的数据窗长就直接取15ms。
短句来源
     When the sampling data is bigger than the imaginary threshold,the counter will plus one.
     用数据窗内每个采样点的值与假想门槛作比较,当采样点大于假想门槛,则计数器加1。
短句来源
     THE DESIGN OF ORTHOGONAL PHASOR FILTER WITH IDENTICAL MAGNITUDE-FREQUENCY CHARACTERISTICS AND OPTIONAL DATA-WINDOW
     任意长度数据窗幅频特性一致的正交相量滤波器设计
短句来源
     Method of Modifying the Datawindow When Running a PowerBuilder6.0 Program
     在PB6.0程序运行中修改数据窗对象的方法
短句来源
     When using2 4sam ple points in a cycle,the time for extracting fundamental frequency can be decreased to10 m s, but the sampling frequency m ust keep up with change of system frequency and the accuracy of A/ D must be sufficient high.
     当采用 2 4点算法时 ,短数据窗效果比较明显 ,可缩短至 1 0 ms左右 ,但采样速率必须随时跟踪系统频率的变化 ,且 A/D转换芯片的精度必须足够高
短句来源
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  data window
The second is the double consideration of the effect of the topographic-isostatic masses within the data window through removing the reference field and the terrain reduction process.
      
The importance of augmenting zeros, choice of the most appropriate data window and pretransformation of the data to avoid the combined effects of energy loss and low frequency content biasing caused by windowing is explained.
      
The basic criterion was the sensitivity of INT to the analysis parameters, especially the data window.
      
Spurious cross-terms were suppressed using a smoothing data window and a Gauss frequency window.
      
There is a trade-off between the errors resulting from a short data window and those due to insufficient temporal resolution.
      
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  data view window
A cross-tabulated table is generated if multiple items are selected for row or column headers in the data view window.
      


This paper presents a quantitative estimation of the calculation error of a digital distance relay based on the R-L model method, resulting from the effect of the neglected stray caoacitance of the transmission line. A suitable FIR digital filter is then proposed to enable the method to be used for distant lines with satisfaction at very short data window compared with any other successful methods up to date proposed .Laboratory tests are included.

本文对计算机距离保护的解微分方程阻抗计算法由于忽略线路分布电容带来的误差作了定量分析。在分析的基础上提出了采用一个数字式有限冲击响应低通滤波器,改善这种方法,使能满意地应用于中长线路,而需要的数据窗较之已提出的其他实用方法要短得多。文中还给出了实验结果。

This paper proposes both the improved Fourier algorithm and differential equation algorithm. A proper integral filter is designed to parallel with the Fourier system Thus the influence of DC offset on impedance calculation is cancelled. In the mean- time,a method of "Changeable Data Window" is advanced. The response time ts decreased remarkably, meanwhile the perfect accuracy is maintained. The differential equation algorithm is also examined and improved in this paper. The scheme using trapezoidal approximation...

This paper proposes both the improved Fourier algorithm and differential equation algorithm. A proper integral filter is designed to parallel with the Fourier system Thus the influence of DC offset on impedance calculation is cancelled. In the mean- time,a method of "Changeable Data Window" is advanced. The response time ts decreased remarkably, meanwhile the perfect accuracy is maintained. The differential equation algorithm is also examined and improved in this paper. The scheme using trapezoidal approximation to the integral terms and a compensation coefficient are adopted, which decreases the error of X by 2%. The method of simnlating analog filter with digital filter is applied to analyse the R, X error o f the scheme and relevant counter-measure is taken. These improved algorithms were examined on a minicomputer DJS-131. The real time program was compiled and tested on a microcomputer INTEL-8086. The results are satisfactory.

本文对傅里叶算法作了改进。傅里叶系统并联一个适当的积分滤波器以后可以消除非周期分量对阻抗计算的影响。同时采用变动数据窗的方法,算法的响应时间显著地减少了而精度仍然得到保证。在本文中,对微分方程算法也作了探讨和改进。采用梯形法近似积分以及补偿系数的方案,提高了X的精度2%。又用数字滤波器模拟了模拟滤波器,对本方案R·X的误差作了分析,并采取了相应的对策。改进后的算法都在DJS-131小型机上作了考核,并且编制了实时程序在INTEL-8086微型机上作了试验。结果是令人满意的。

A new classical Power rlensily spectrum estimation metlnd has been established in this paper, in which an approximation algorithm of Fourier transform (WFFT) [1] is used. Principle and characteristics of this methol has been described. Compared with the existing Welch method, this method has the follow ing advantages; ① it needs not to decomposite the sequence into sections; ② it doesn't need special window, i. e., the rectangu lar window would only he used; ③ a better estimation quality of power density spectrum...

A new classical Power rlensily spectrum estimation metlnd has been established in this paper, in which an approximation algorithm of Fourier transform (WFFT) [1] is used. Principle and characteristics of this methol has been described. Compared with the existing Welch method, this method has the follow ing advantages; ① it needs not to decomposite the sequence into sections; ② it doesn't need special window, i. e., the rectangu lar window would only he used; ③ a better estimation quality of power density spectrum may be obtained using only smaller sampled data; ④ the calculation is simple, without aliasing error and hish resolution.

本文采用傅里叶变换(简称傅氏变换)的近似算法(WFFT)[1]做通过采样获得的时间序列的功率谱密度估计,形成了一种新的经典谱估计方法。文章叙述了这种谱估计方法的原理和特点,并通过举例计算,把新的谱估计方法与经典谱估计中较好的Welch法进行了比较。计算表明,在一般情况下,新的谱估计方法与Welch法相比有如下优点:(1)可以对数据作整段处理,即无需分段计算;(2)不需加数据窗,即只加矩形窗;(3)只用较少的数据便可得到较好的估计质量;(4)具有计算简单,无混迭误差,分辨率高,泄漏误差小,估计质量较好等特

 
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