dga 中文意思是什麼

dga 解釋
采辦局
  1. In 1958, the year of the foundation of the fifth republic, president charles de gaulle decided to establish “ la d l gation g n rale pour l ? armement ” ( dga ) in order to achive his independent defense and foreign policy

    摘要一九五八年第五共和成立之初，戴高樂總統積極推動建立所謂獨立自主的國防與外交政策，為了達成國防自主性的目標，戴氏決定成立軍備局以統籌發展法國的軍武體系。
  2. Various apsd estimate arithmetics including periodogram method, correlogram method, blackman - tukey method, barlett method, yule - walker method, lda, and dga were implemented on ccs ( code composer studio )

    譜估計演算法分別採用了經典非參數方法中的周期圖法、相關圖法、 bt法、 bartlett法，和參數法中的yule - walker演算法、 lda 、 dga 。
  3. In connection with the difference and distribution characteristic of the samples in sample space rs based on dga, a new self - adapted weight fuzzy omean clustering model of fault diagnosis of the power transformer based on the potential function is proposed. meanwhile, from the aspect of geometry characteristic of fc - divided in s dimension sample space, a method is proposed for the purpose of getting an effective adjacent radius, adaptive cluster number c and original cluster center of x sample set. for the diagnosis sample x, the property measure and diagnosis rule are proposed, which under the condition of potential density function that determine c number of optimal fuzzy cluster p1

    根據以變壓器dga數據為特徵量的樣本空間各樣本差異特性以及樣本在空間r ~ s的分佈特性，首次提出了基於勢函數自適應加權的變壓器絕緣故障診斷的模糊c -均值聚類模型；同時，從s維樣本空間的f ~ c -劃分幾何特性出發，提出了一種求取樣本集的類勢有效鄰域半徑和自適應求取聚類數和聚類中心初值的方法；對一個待診斷樣本，設計了基於類勢密度函數意義下的屬性測度和診斷準則。
  4. Dissolved gas analysis ( dga ) is one of the mainly technology methods to diagnose the internal malfunction in transformer. by request of dl / t722 - 2000, < guide to the analysis and the diagnosis of gases dissolved in transformer oil >, the component of h _ 2, c _ 2h _ 2, c _ 2h _ 4, c _ 2h _ 6, ch _ 4, co and co _ 2 is used to judge and analyze the internal malfunction in transformer

    本系統首先接收氣相色譜儀發送的數據信息，並對這些數據進行處理與分析，計算出譜圖數據的波峰高度、波峰面積、波峰起始點、基線等值，在此基礎上依據定量分析及故障診斷原理對變壓器進行診斷，得出結論。
  5. When the fault information of transformer is given, one can match the information to the rule sets of relative nodes. even when the data of dga are imperfect, the diagnosis results are correct

    用變壓器故障信息與知識庫中相應節點的規則集進行匹配，即使在氣相色譜分析數據不完備的情況下，也能得到正確的診斷結果。
  6. To the question of the low computational efficiency, low computational speed, low stability and unsatisfactory calculation result of the traditional method to get the optimal thresholds, a new multi - dimension thresholding method based on dga ( dissipative genetic algorithm ) that has higher capability and speed of optimization is developed

    模擬結果表明採用耗散結構遺傳演算法進行優化可使圖像處理時間和計算量大大減少，而處理精度並沒有受到影響，且有效避免了遺傳演算法過早陷於局部最優的不足，增強了演算法的穩健性。
  7. In accordance with the technological difficulties encountered in the process of insulation supervision based on the dissolved gases analysis ( dga ), several kinds of model and method are presented to improve the reliability and precision of fault diagnosis of the power transformer. main research content includes : by deeply studying the common transformer faults diagnosing methods, such as three - ratio methods and improved electrical committee agreements, several shortcomings such as uncertainness judgment when the fault reasons, phenomenon and principles come out together while can not consistent to each other etc. for this reason, the old methods can not fully meet the need to engineering practical application. considering fuzzy relationship matrix can fully represents the causality between fault symptoms and fault types, when diagnosing complex equipments with multiple symptoms and fault causes such as power transformer, a synthetic fuzzy diagnosing model is firstly proposed to diagnose transformer ' s insulation faults based on dga in this paper

    本文針對應用油中溶解氣體分析方法進行變壓器絕緣監督時所遇到的主要技術難點，提出了提高變壓器故障診斷的準確性、可靠性的幾種模診斷方法，主要研究內容有：通過對判斷變壓器故障常用的三比值法和改良電協研法的深入分析，其診斷準確率較高，但對故障原因、故障現象和故障機理間同時存在不確定性和模糊性的變壓器等電氣設備的故障診斷，難于滿足工程應用的需要；在處理變壓器等結構復雜設備的多癥狀、多原因故障診斷時，模糊關系矩陣可以全面反映這種癥狀與故障類型間的因果關系，進而提出了變壓器故障診斷的模糊綜合診斷模型；同時作者還深入分析了模糊運算元的特性；針對常用的模糊評判結果的模糊集的集化方法的不足性，提出了將模糊綜合診斷與模糊規則推理結合起來進行故障診斷的方法，能達到較好的效果。
  8. This thesis disusses the current states and the matter of the transformer condition monitoring and diagnosis fault. afer analying that dga can only reflect the fault type but ca n ' t confirm the fault location, part - discharging signal can realize fault location in theory but ca n ' t be carried out easily for the inconstant influence of circumstance, we present a method that conbinates the oli - gas and electric quanlities to monitor the transformer. using on - line monitoring of oli - gas conform the fault type. using on - line electric quanlities confirm the fault location. with this method, a fault diagnosis system and corresponding diangnosis flow are proprosed. the main work of this thesis consists of the following parts : 1

    本文主要研究了電力變壓器狀態監測與故障診斷的現狀以及存在的問題，針對目前dga （油中溶解氣體色譜分析法）只能定性分析變壓器的故障，不能進行故障定位，而局部放電雖然能夠進行故障定位，但由於現場的干擾復雜多變，難以提取有效的局部放電信號，從而提出了結合油氣量和電氣量兩個方面對變壓器進行狀態監測。通過油氣量在線監測，判斷其故障類型和性質；通過電氣量在線監測，對變壓器的關鍵部件? ?繞組實現故障定位。
  9. 2. design the scheme of expert system for transformer fault diagnosis based on dga and rough set theory ieee considers dissolved gas analysis ( dga ) is the most efficient method to examine the interior fault of transformer

    基於氣相色譜分析和粗糙集理論的電力變壓器故障診斷專家系統方案設計變壓器內部故障的檢測有多種手段， ieee認為對變壓器內部故障早期診斷最有效的方法是油中氣體色譜分析法。
  10. Combining ann with dissolved gas analysis ( dga ) that is a typical method in transformer diagnosis, transformer fault diagnosis system with friendly interface and excellent capability is finished by java. besides, the method of selecting networks parameter is discussed detailedly, and the influence of different parameters on diagnosis results is analyzed

    將變壓器診斷中典型的油中氣體分析法和神經網路方法相結合，採用java語言開發出界面友好、性能優秀的變壓器故障診斷系統；此外，文中還詳細探討了網路各結構參數的選擇方法，並且就變壓器這一實際診斷系統，分析了不同結構參數對系統誤差的影響。
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