pd system 中文意思是什麼
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The detecting system can monitor pd online, reject noises, analyze pd faults, and show the finger prints of the detected pd
此系統可在實驗室正確運行，可以對放電進行監測、從干擾中提取局部放電脈沖、統計分析放電類型並繪制出統計譜圖。 -
The applications of iron - containing compounds ( pd / fe bimetallic system, fes2, fe2o3, fes, fe4 ( superscript ) fe2 ( superscript ) ( oh ) 12so4yh2o, etc ) in degradation of chlorination compounds, such as hexachloroethane, carbon tetrachloride, pentachloroethane, tetrachloroethane, trichloroethane, trichloroethylene, tetrachloroethylene and so on, are reviewed in this paper, as well as their reaction mechanisms
摘要綜述了鈀鐵、二硫化鐵、硫化鐵、三氧化二鐵、綠銹等含鐵化合物在降解六氯乙烷、四氯化碳、五氯乙烷、四氯乙烷、三氯乙烷、三氯乙烯、四氯乙烯等有機氯化物中的應用以及降解機理。 -
Secondly, we discuss the application of if sampling and digital demodulation technique in pd weather radar signal processing system
其次，本文研究了中頻采樣及數字解調技術在氣象雷達中的應用。 -
Utra - high - frequency pd measuring system for power transformer
電力變壓器超高頻局部放電測量系統 -
Then, we introduce the basic structure of pd weather radar signal processing system and their function of each subsystem, mainly including intermediate frequency receiver, clutter elimination, range correcting and smoothness, ambiguity resolution and spectrum estimation
並在此基礎上介紹了氣象雷達信號處理系統的基本構成與各部分的主要功能，主要包括氣象回波中頻接收、雜波抑制、距離訂正、平滑處理、解模糊和譜矩估計等。 -
This thesis discusses the pulse doppler ( pd ) weather radar signal processing system including digital intermediate frequency ( if ) receiver, especially on the application of if sampling and digital demodulation technique in pd weather radar signal processing system, the influence of amplitude and phase unbalances of in - phase and quadrature channels on weather radar echo spectrum estimation, ground clutters elimination algorithms and a typical engineering realization scheme of pd weather radar signal processing system
本論文研究的是採用數字中頻接收技術的脈沖多普勒氣象雷達信號處理系統，重點研究了中頻采樣及數字解調技術在脈沖多普勒氣象雷達信號處理系統中的應用、正交雙通道幅相不平衡對氣象回波譜估計的影響、地雜波濾波演算法，以及脈沖多普勒氣象雷達信號處理系統的具體工程實現。 -
According to step - response experiment, math model of the hotplate was set up and the temperature of controlling system including temperature detection circuit, pd controller, voltage pulse - wide transforming circuit and executor was designed
以階躍響應實驗為基礎，初步建立起控制系統的數學模型，設計了適用於該電熱板的閉環溫度控制系統。系統主要包括溫度檢測電路、 pd控制器、電壓-脈寬變換電路及執行元件。 -
Distribution behaviors of pd in proh - so4 aqueous biphasic system and its application in determination of pd
硫酸銨雙水相萃取體系中的分配行為及在鈀測定中的應用 -
Thus, pd is much more than degeneration of the dopaminergic nigrostriatal system
因此， pd並不僅僅是多巴胺黑質紋狀體系統的變性。 -
Auto - recognition to discharge types in on - line pd monitoring system could be used to find out internal partial defects and the relevant discharge development degree in time, and then prevents equipment from the coming faults
局部放電在線監測系統中的放電類型自動識別，能夠及時發現絕緣內部局部缺陷及放電發展程度，防止事故發生。 -
The theoretic analysis and computer simulation results reveal that this influence ca n ' t be ignored. because the if sampling and digital demodulation technique can improve amplitude and phase unbalances of in - phase and quadrature channels, we apply it in the pd weather radar signal processing system and select several digital demodulation algorithms, which are easier to implement, for this system
由於採用中頻采樣和數字解調技術能有效地提高正交解調兩路的幅相一致性，本文將中頻采樣及數字解調技術應用到脈沖多普勒氣象雷達信號處理系統中，並結合氣象信號的特點選擇了適合工程實現的中頻采樣及數字解調演算法。 -
Thirdly, we study several ground clutters elimination algorithms combining the properties of ground clutters and we get the conclusion that the frequency domain algorithm has better performance through extensive analysis and comparison. finally we proposed a typical pd weather radar digital signal processing system realization project including the software and hardware implementation
本文還結合氣象雷達地雜波的特點詳細研究了各種濾除地雜波濾波演算法，在對各種濾波演算法進行分析和折中考慮之後，選擇地雜波頻域濾波演算法應用於本信號處理系統。 -
The attitude control system using reaction thrusters is studied. based on phase plane theory, pd control law, time - optimal control law and time - fuel optimal control law were designed. characteristics and application conditions of these laws were compared in simulations
針對以噴氣推力器作為執行機構的姿態控制系統，基於相平面分析方法，分別設計了pd 、時間最優和燃料-時間混合最優控制律，在模擬中分別比較了這幾種方法的特點和適用條件。 -
The new adrc technique was concluded from the related references in recent years, and the adrc theory was systemically introduced, which included tracking - differentiator ( td ), extended state observer ( eso ), nonlinear pid, nonlinear feedback ( nf ) and active disturbance rejection controller ( adrc ), and etc. the author first designs a pd attitude control system, indicating : using pd attitude control, the time of small satellite gesture capture is long and the precision of control is low
從近幾年有關文獻中總結了自抗擾控制新技術，系統介紹了自抗擾控制理論，其中包括跟蹤微分器（ td ） 、擴張狀態觀測器（ eso ） 、非線性pid 、非線性反饋（ nf ）和自抗擾控制器（ adrc ）等。設計了主動磁控小衛星pd姿態控制系統。指出採用pd姿態控制，微小衛星姿態捕獲時間較長，姿態控制精度較低。 -
In the joint space, proportional plus derivative ( pd ) controllers without joint velocity measurement are designed by making use of the inherent passivity of the robot control system
另外，在關節空間中，我們利用機器人控制系統固有的無源性，設計了無需測量關節速度的pd控制律。 -
The key points of the air - condition system designing are : firstly, selecting the control rules. now the more often used control rules are pi, pd, pid. but the question is which one fit air - condition control system most
空調控制系統的設計關鍵在於：一是選擇控制規律，目前常用的有pi 、 pd 、 pid控制規律，但究竟哪一種控制規律更適合於空調控制 -
Study on activity of dechlorination of o - chlorotoluene catalyzed by pvp - pd - hg tio2 in aqueous system
催化鄰氯甲苯水相脫氯活性研究 -
The development of computer and the technology of the simulation advances the modeling and the technology of computer simulation, which make the computer simulation as an independent knowledge develop increasingly and used widely many kinds of research. this thesis researches the data processing and the display which is the part of the testing and evaluation for the performance of pd radar ' s jamming and anti - jamming with simulation in the pc. the whole project finishes the integrate model for researching the pd radar ' s system, jamming and anti - jamming, which is the first in the domain of electronic anti - jamming in our country
計算機和模擬技術的發展促進了建模和計算機模擬技術的迅速發展，使計算機模擬技術成為一門獨立學科得到日益發展，並廣泛應用於各種科學研究中，本論文是用pc機模擬研究pd雷達干擾和抗干擾性能評估中的數據處理和顯示控制系統部分，整個項目是我國電子對抗領域首次完整地為研究pd雷達系統及其干擾和抗干擾性能評估所建立的基於pc機的模擬研究平臺。 -
Third, controlling chaos in the chaotic n - scroll chua ' s circuit is studied. the approach taken is to use feedback of a single state variable in a simple pd ( proportional and differential ) format. first, the unstable fixed points in the n - scroll chua ' s circuit are classified into two different types according to the characteristics of the eigenvalues of the linearized system matrix at the fixed points
第三，研究了多渦卷chua電路中不動點處jacobian矩陣特徵根的性質，並據此將不動點分成兩類，應用變量的比例微分反饋法分別對這兩類不動點的可控性進行了研究，研究發現該法只能實現第一類不動點及其相應子空間的混沌控制，而不能完成第二類不動點的混沌控制，並給出了數值模擬結果，理論分析和數值模擬證實了該方法的有效性。 -
At the end of the dissertation, the fuzzy pd track tail controller is designed. the pd controller and controller of attitude angle are made up of flight control system of helicopter
最後，本文設計了直升機模糊pd軌跡跟蹤控制器，與姿態角控制器相結合，完成了對整個飛行控制系統的設計。
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