診斷閾值 的英文怎麼說
中文拼音 [zhěnduànyùzhí]
診斷閾值
英文
testing threshold-
This thesis studies the law of affecting de - noise result and the selection of the threshold and the wavelet function, the combination of wavelet and fft in the fault diagnosis of turbine - generator sets : by the de - noise anslysis of blocks and sin signals, concludes : to blocks signals, usually adopts soft threshold ; the law of affecting de - noise result is when use wavelet auto - de - noise, with the increasing of decomposed level, the de - noise result becomes worse while the level blow the 3, when the level above 3 and when uses wavelet packet, it is the other way round ; the best de - noise methods of the signal is that uses " dbl " wavelet function, three level, soft and " rigrsure " threshold
本文研究了分解層數對消噪結果影響的規律和閾值、小波函數的選取，結合小波分析與fft分析診斷汽輪發電機組的故障。通過對brocks和sin兩信號的分析，得出：對blocks信號進行分析一般採用軟閾值；分解層數對消噪結果影響的規律為用小波自動降噪在分解層數小於3時，隨著分解層數的增加，消噪結果變好，反之，則變差，用小波包降噪時隨著分解層數的增加，消噪效果變好；適宜選用dbl小波軟rigrsure閾值自動消噪。Through the application researches on 6135 type diesel engine, the feasibility and diagnosis accuracy of the method that using 0. 5 order torsional vibration to determine the fault threshold value was verified
以6135柴油機為對象的應用研究驗證利用0 . 5諧次扭振確定故障閾值方法的實用性和診斷準確性。( 4 ) since there is no perfect theoretical guide, the characteristics of orthogonal wavelet, semi - orthogonal wavelet and biorthogonal wavelet in signal decomposition and reconstruction are compared, and the conclusion of the study demonstrates that semi - orthogonal wavelet is a good wavelet for fault diagnosis in tilting control system of tilting train. a new approach is presented for deciding the fault threshold. ( 5 ) a generalized wavelet neural network is put forward by integrating wavelet analysis with neural network
（ 4 ）針對小波基的選擇缺乏完善理論指導的實際情況，通過對常用的正交、半正交、雙正交小波基提取信號特性的比較，確定出了適合擺式列車傾擺控制系統故障診斷的小波基? ?半正交小波基，並提出了一種新的確定故障檢測閾值的方法，可以快速地檢測出故障發生時刻。The faults in the automotive engine control systems can be reliably diagnosed by the proposed method through suitable choice of the threshold for the residual signals of the uifdos
合理選擇殘差信號的閾值，能夠可靠地診斷汽車發動機電控系統負載不可測且存在隨機干擾時的故障。The threshold evaluation study of bone quantitative ultrasound to diagnose osteoporosis with dual x - ray absorptiometry
腰椎骨密度診斷評價超聲診斷骨質疏鬆的閾值研究During the course of develop fault diagnostic method, the influence to the training circle number with network structure 、 learning rate 、 initial weight value & door value etc are discussed. by comprehensive analyses and comparing, the comparatively rational value is adopted to be network ' s eigenvalue
在制粉系統故障診斷樣本訓練過程中，本文作者探討了網路結構、學習率、初始權值閾值等因素對訓練速度的影響，為選取合理的網路參數提供了依據。( 9 ) a method, which combines the neural network and the genetic algorithms, is advanced. it uses the genetic algorithms to improve the weight and threshold of the neural network first
（ 9 ）提出了以遺傳演算法對神經網路的權值和閾值進行優化並用神經網路細調的多故障診斷方法。The major contents of the paper were as follows : 1 fuzzy method for the fault diagnosis was researched. the fuzzy diagnosis model and the multiple - layer fuzzy model based on threshold and maximum rules for fuzzy diagnosis were built
工作的主要內容有： 1 、研究了故障的模糊診斷方法，以閾值和最大隸屬度為判斷準則構建了模糊綜合診斷模型和模糊分層診斷模型，對故障信號進行診斷。分享友人