sampling window 中文意思是什麼
sampling window
解釋
抽樣窗口-
For fir, after researching window function method and frequcy sampling method, it is suggested that the filter designed from blackman window function is satisfactory, afterward the filter is programmed with reasonable operational structure
再分別對fir濾波器的窗函數法和頻域抽樣法進行模擬分析，從中得出用512點的布拉克曼窗函數設計的fir濾波器能滿足濾波要求，然後選用合理的運算結構對此濾波器編程實現。 -
Fpga and dvb standard are introduced firstly, dvb - c standard and composition of its system are analyzed completely, development of modulator structure and dvb - c digital modulator composition are presented, more over, analysis of respective modular are given. then, principle of dvb - c digital modulator system are presented, they are error control technique 、 mqam 、 nyquist rule and root raised cosine filter 、 window design method for fir filter 、 multi - rate signal processing ( integer interpolating, conversion of fractional sampling, equal conversion of net structure, polyphase structure for filter, poly - phase structure for interpolator, multi - stage implementation of samplying conversion ) 、 distrubited algorithm 、 cic filter 、 dds 、 cordic algorithm
接著，專門利用一個章節闡述了dvb - c前端調制系統原理，他們了差錯控制技術、多進制調制（ mqam ） 、 nyquist準則與平方根升餘弦濾波器、有限沖擊響應濾波器的窗函數設計法、多抽樣率信號處理包括（整數倍內插原理、分數倍抽樣率轉換、網路結構的等效結構、濾波器的多相表示、內插器的多相表示、抽樣率轉換的多級實現） 、分散式演算法、 cic濾波器、直接數字頻率合成（ dds ） 、 cordic演算法。 -
First, the harmonic analysis method based on fft is discussed, and some practical issues in the application of fft are investigated. the factors which affect the calculation precision of harmonics, such as sampling and weighting of window function, are analyzed, and then the instructive conclusions for designing voltage monitor are obtained
首先闡述了基於fft的諧波分析方法，對fft實際應用中的問題進行了研究，通過實際算例探討了采樣方法、窗函數加權等影響諧波計算精度的因素，得到了對電壓質量監測儀的設計具有指導意義的結論。 -
The relations between hartmann measuring data and calculating data are presented with stress - birefringence. temperature increments and phaseshifts of working caf2 window and sampling fluoride glass window are measured. during experiments, the simulating cavity is designed, on which the sampling plane and spherical window are fixed
推導了有應力雙折射時hartmann測量數據與計算數據之間的關系，測量了工作caf _ 2窗口和樣品氟玻璃窗口的溫升和附加相移，設計了模擬腔，將樣品氟玻璃平板和球殼窗口加在模擬腔上進行實驗。 -
Improvement of indication stability of measuring signal by slip window sampling
利用滑動窗口法改善測量信號的示值穩定性 -
In this thesis, some traditional methods are introduced, such as, window method and frequency sampling method
本文介紹了一些傳統的方法，如窗函數法、頻率采樣法。 -
An significant symbol has been used to determine the technique of 3 - d discontinuities network modeling of rock mass is good or not, which is to check whether the model can reappear the reality situation of rock mass or not, in order to make the 3 - d network model to meet the need of the actual rock engineering, the methods to verify the result of the modeling are required, one of the method to be used is to compare the figures between the section of the numerical model and the sampling window of in - situ model, the second method to be used is verify the data set between the numerical model and field data, only if the verification obtained a good precision, then the model can be considered as a efficiency model, and it can be applied into the actual rock engineering
摘要巖體隨機不連續面三維網路模擬技術成熟與否的一個重要標志就是最終的網路模型是否能夠較真實地再現巖體的實際情況，為了使三維網路模型的結果能夠真正地應用於實際工程，就必須對模擬的結果進行必要的檢驗，檢驗的辦法就是將模擬出的模型剖面圖形與原型測量窗口的圖形進行圖形對比，或者將原型的觀測數據與模型的測試數據進行數據對比，當這種檢驗達到精度時，模擬出的模型為有效模型，可以投入工程實際應用。 -
Secondly, spfm ( sliding polynomial fitting method ) was discussed and the arithmetic has been compared with pfm ( polynomial fitting method ). meanwhile, the model was corrected, and the parameters of arithmetic - - system sampling frequency, the length of sliding window and the exponent of fitting polynomial - - have been optimized
並在此基礎上討論了滑動窗多項式擬合預測演算法（ spfm ） ，對該演算法與普通的多項式外推預測進行了比較，對模型進行了適應性修正，並對演算法的參數：系統采樣頻率、滑動窗大小、擬合多項式指數進行了優化。 -
Finally, the small computing load and error, and the better estimation effect can be obtained when sampling frequency is more than 4hz and sliding window is between 10 and 20 and polynomial exponent equals 3 or 4 by the computer - based simulation
最後通過計算機模擬說明在預測海上艦船運動時要求采樣頻率大於4hz ，滑動窗大小取10 20 ，多項式為3或4階時計算量和誤差較小，預測效果較好。
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