正化學信號 的英文怎麼說

中文拼音 [zhēnghuàxuéxìnháo]
正化學信號 英文
positive chemical signal
  • : 正名詞(正月) the first month of the lunar year; the first moon
  • : Ⅰ動詞1 (學習) study; learn 2 (模仿) imitate; mimic Ⅱ名詞1 (學問) learning; knowledge 2 (學...
  • : 號Ⅰ名1 (名稱) name 2 (別號; 字) assumed name; alternative name3 (商店) business house 4 (...
  1. Psittacula agapornis ), oscine passenon ( emberiza rutila ) and the vocalizations of sub - oscine passerine ( melopsittacus undulates, psittacula agapornis ) after sectioning nxiits were recorded by sharp gf - 6060 recorder. cooledit2000, an acoustic analyzing software, was used to produce the original wave and it ' s expanded time windows, sonograms, spectrums and power static histograms. to distinguish the acoustic differences of their natural vocal and to find the changes of sub - oscine passerine ' s song after sectioning nxiits, the above results is acoustically analyzed and compared, expecting to provide some advantage to further explaining the mechanism of vocal production

    本實驗以非鳴禽(家鴿、家雞) ,亞鳴禽(虎皮鸚鵡、牡丹鸚鵡)以及鳴禽(栗? )為實驗材料,記錄其常叫聲以及亞鳴禽斷nxiits后的叫聲,用cooledit2000聲音處理軟體制出原始及其展開圖,聲圖,頻率譜圖以及能量統計分布圖,並對所得結果進行聲比較分析,以期得到鳴禽、亞鳴禽及非鳴禽叫聲在聲特性上的差異,以及亞鳴禽在斷神經后叫聲的聲,旨在為進一步解釋其發聲機制提供幫助。
  2. Abstract : the applications of chemometric approaches, such as opt imization, multivariate calibration, artificial neural network, signal processin g, resolution, parameter estimation etc., in capillary electrophoresis have bee n reviewed

    摘要:綜述了最優方法、多元校方法、人工神經網路、曲線分辨、處理等計量方法在毛細管電泳分離分析中的應用,展望了計量在毛細管電泳中的應用前景。
  3. It includes symposia, monographs and reviews, statistics, optimal design of experiments and optimization methods, analytical signal processing, multivariate calibration, chemical pattern recognition, qsar, library searching and expert systems, chemometric education, with 168 references cited

    內容涉及統計與統計方法、試驗設計與優、分析處理、多元校模式識別、定量構效關系( qsar ) 、數據庫及專家系統、計量等方面,共引用文獻168篇。
  4. There must be a marine casualty happened every 4 days before 1984, the amount of marine casualty happened at this area corresponds to 1 / 7 amount of the whole changjiang " marine casualty, so mariners gave it a name as " mouth of tiger ". due to the specific geographical condition and the extremely representative vessel traffic management of changjiang yingongzhou channel section, many intelligent people began researching and practicing the vessel traffic management of this changjiang " s down - stream complicated channel section from 1980s, at dec 15th 1984 the authority at that time - changjiang yingongzhou channel section previously ; up to the last years of 1980s ministry management administration applied traffic control on changjiang yingongzhou channel section previously, up to the last years of 1980s ministry of communications assigned shanghai marine college, shanghai ship & shipping research institute and changjiang harbor superintendence administration to make feasibility demonstrate about modern vts of zhenjiang traffic control section ; in 1990 dasha radar station which is the first radar vts station with inner river was finished, groped a new way for applying modern radar traffic control of vessel traffic management ; in 1997 the vtms of changjiang " s down - stream from nanjing to liuhekou was completed with connecting net and came into operation formally, meanwhile the signals of dasha radar station were conveyed to vts center by light cable, and then united applying vessel traffic management upon the whole authorized area ; in jun 2001 jiangsu msa made changjiang yingongzhou channel section as the first experimental group of creating " civilized, safe, passable channel activity, updating dasha radar antenna and receive - transmitter building closed - circuit television monitor system, setting uo safety warning board, starting navigational route reformation, carrying out united construction

    1984以前這里平均每四天就發生一起海損事故,事故數占整個長江的1 7 ,被行船人稱為「老虎口」 。長江尹公洲航段緣其極為特殊的地理區位條件和極具代表性的船舶交通管理,從上個世紀八十年代初就有識之士開始了這個長江下游最復雜航段的船舶交通管理探索和實踐。 1984年11月15日當時的長江航政管理局在長江尹公洲水域率先施行交通管制;到八十年代末交通部委託上海海運院、上海船舶研究所和長江港監局聯合開展鎮江交通管制段建立現代交管系統的可行性論證; 1990年大沙雷達站? ?內河第一座雷達交管站建成,摸索實施現代雷達交管的船舶交通管理新途徑; 1997年長江下游南京至瀏河口船舶交通管理系統建成聯網投入式運行,同時將大沙交管雷達通過光纜傳輸至交管中心,統一實施全轄區船舶交通管理; 2001年6月江蘇海事局將長江尹公洲航段作為第一批創建「文明平安暢通航段」活動試點航段,更新大沙雷達天線和收發機,著手閉路工業電視監控系統建設,設立安全警示牌,啟動航路改革,開展聯合「共建」 。
  5. Aim at the dtc ' s blemish mentioned above and the direction of dtc technique development, the dissertation put great emphasis on the work as follows, with an eye to exalt dtc system function : ( 1 ) a new speed - flux observer of an induction motor is proposed to enhance the accuracy of flux observing, which is an adaptive closed - loop flux observer and different from the traditions. a new adaptive speed - observation - way is deduced out according to the popov ' s stability theories ; ( 2 ) to improve the performance of dtc at low speed operation, we have to exalt the accuracy of the stator flux estimation and a new way of bp neural network based on extended pidbp algorithm is given to estimate and tune the stator resistance of an induction motor to increase the accuracy of the stator flux estimation ; ( 3 ) digital signal processor is adopted to realize digital control. an device of direct torque control system is designed for experiment using tms320lf2407 chip produced by ti company ; ( 4 ) bring up a distributed direct torque control system based on sercos bus, sercos stand for serial real time communication system agreement which is most in keeping with synchronous with moderate motor control ; ( 5 ) the basic design frame of the hardware and software of the whole control system is given here and some concrete problem in the experiments is described here in detail

    針對上面提到的直接轉矩控制的缺陷和未來直接轉矩控制技術發展方向,本論文重點做了以下幾個方面的工作,目的在於提高dtc系統的綜合性能: ( 1 )提出一種新型的速度磁鏈觀測器,新型的速度磁鏈觀測器採用自適應閉環磁鏈觀測器代替傳統的積分器從而提高磁鏈觀測的精度,並且根據popov超穩定性理論推導出轉速的新型自適應收斂律; ( 2 )改善系統的低速運行性能,主要從提高低速時對定子磁鏈的估計精度入手,提出了一種提高定子磁鏈觀測精度的新思路? ?利用基於bp網路增廣pidbp習演算法來實時在線地修定子電阻參數; ( 3 )採用數字處理器dsp實現系統全數字硬體控制,結合ti公司生產的tms320lf2407晶元,設計了直接轉矩控制系統的實驗裝置; ( 4 )提出了基於sercos總線網路分散式的直接轉矩控制系統, sercos ( serialrealtimecommunicationsystem )是目前最適合同步和協調控制的串列實時通協議; ( 5 )基本勾勒出整個控制系統的硬體和軟體設計基本框架,詳細描述一些實驗中的具體的細節問題。
  6. It is found from the experiment that under the conditions of peak magnetic field of 0. 57t, beam pulse fwhm ( full width of half maximum ) of 44ns, a microwave radiation pulse with fwhm 25ns and whole width of 35ns is produced, when the intensity of the guiding magnetic field rises, the peak microwave power changes little but the width of the pulse reduces. the a - k gap also has obvious influence on the microwave radiation, the stable and higher microwave output is obtained under suitable gap

    實驗中還發現,在峰值磁場0 . 57t和束流半高寬44ns情況下,得到了25ns半高寬和35ns底寬的微波脈沖,隨著導引磁場增加,微波幅值基本不變,但國防科技術大研究生院位論文是微波脈沖寬度會逐步減少;實驗中還發現磁場線圈位置有一定的軸向調節范圍,說明在磁場軸向分佈的一定變范圍內,器件都可以常工作,這對以後的永磁場系統導引的微波實驗有利。
  7. Secondly, comparing with the algorithm that was given by english scholars a. k. nandi and e. e. azzouz in 1995, this dissertation presents a modified automatic recognition algorithm of six kind of digital modulation types such as 2ask, 4ask, 2psk, 4psk, 2fsk and 4fsk, which only uses four key features, and has a very great exaltation in the rate of correct recognition and the performance of signal to noise, we puts forward the constitution of the best threshold which is applicable to the signal that changes within the scope of the signal to noise rate ( snr ) from 5db to 30db, and the overall success rate is not lower than 92 % when snr is over 7db

    其次,針對1995年英國者a . k . nandi和e . e . azzouz提出的針對2ask 、 4ask 、 2psk 、 4psk 、 2fsk和4fsk這六種常用的數字調制識別的演算法,提出了一種數字調制方式識別演算法( dmra )的改進演算法。該演算法僅利用四個特徵參數,就可以識別這六種調制方式,而且在調制識別率和噪比性能上都有了很大的提高,能夠在噪比不低於7db時,對實際的識別確率高於92 % 。並且提出了最佳門限的設置方法,設置的門限適用於噪比在5db ~ 30db范圍內變
  8. Circuit simulation by computer has been an important assistant and practicality tool. protel 99 has a massive performance to design and simulate the circuit, the result based on the signal simulation of electrochemical interface circuit by protel 99 proved that the circuit are proper and can accomplish the potentiostatic, galvanostatic and coulostatic measuring

    計算機輔助電路模擬分析已成為電路設計的主要助手和工具, protel99具有功能強大的電路設計和模擬功能,運用protel99對電介面電路進行模擬,模擬結果表明電介面電路設計確,能實現恆電位、恆電流和恆電量測試。
  9. Orthogonal signal correction ( osc ) is provided a novel spectral pre - processing method in recent years, which is based on the orthogonal projection

    基於投影分解的( osc )方法,是近年來在計量領域中提出的一種全新數據預處理方法。
  10. Some researchers in universities are investigating the possibility that high levels of fat and fructose are mucking up our brain chemistry, and thereby muting the signals that would normally tell us to put down the fork

    一些大者在研究是否過量的脂肪和果糖會擾亂我們大腦中的物質,從而防礙大腦在常情況下發出讓我們放下餐叉的
  11. In order to understand the nature of the ecologist ' s investigation , we may think of the density - dependent effects on growth parameters as the “ signal ” ecologists are trying to isolate andinterpret , one that tends to make the population increase from relatively low values or decrease from relatively high ones , while the density - independent effects act to produce “ noise ” in the population dynamics

    為了能理解生態家們所從事的研究的性質,我們可以把那些作用於增長參數的密度依賴效應視作生態家們力圖將其分離並予以解釋的「」 ,是這一傾向于使種群從相對較低的數值遞增,或從相對較高的數值遞減;而與此同時,那些密度獨立效應起到的作用則構成了種群動態變中的「噪音」 。
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