carrier current 中文意思是什麼

carrier current 解釋
載波電流
  • carrier : n 1 運送人,搬夫;負荷者;使役,〈美國〉信差,郵遞員;送報人;〈英國〉運輸行,運輸業者。2 傳書鴿...
  • current : adj. 1. 通用的,流行的。2. 現在的,現時的,當時的。3. 流暢的;草寫的。n. 1. 水流;氣流;電流。2. 思潮,潮流;趨勢,傾向。3. 進行,過程。
  1. Technique of transmitting data via power line ( pl ) , a new technique developed in recent years , is used to automatize the free collecting system in public service and the management of uptown service 。 this article discussed the advantage , disadvantage and the current state of the power line carrier communication 。 the advantage , method and current state of using spread spectrum technique in power line communication are discussed 。 then the characteristic of low voltage power network was also compendious analyzed 。 in this paper , after introducing the principle of ssc , design of hardware and software of the system are been discussed 。 this system has been put into use , the result has proved its high stability and reliability

    本文研究旨在提供一種利用低壓電力供電網路、低成本、高可靠地實現公共事業收費自動化和小區物業管理智能化的技術應用。討論了電力線載波通信的優、缺點及現狀,擴頻技術在電力線載波通信應用的優點、方式和現狀,並對低壓電力線網路的特性進行了簡單的分析。在闡述了擴頻通信的基本原理的基礎上,本文詳細地介紹了電力載波遠程抄表系統的具體實現,包括硬體模塊和管理軟體本系統已投入運行,具有較高的穩定性和可靠性。
  2. As an important carrier of the college ideological education in current stage, the students ' leagues in college have a lot of positive functions, such as ideology - directing, capacity - training, rally - inspiring, continence - cultivating and so on

    摘要高校學生社團作為新時期高校思想政治工作的重要載體,它對高校思想政治工作具有教育導向、素質拓展、凝聚激勵、內化自律等功能。
  3. Economic globalization is the most basic character of current worldwide economic development and it greatly changes the economy, politics , culture and social lifestyle in every country after china ' s entry into wto , it will take more active part in the process of the economic globalization both in wider fields and in deeper degree to the ideological and political education , economic globalization is a sword with both sharp sides , that is , on one hand , it provides great opportunities for the development of the current ideological and political education , and on the other hand , it also brings austere challenges therefore , on the basic of the era features and the changes in our thoughts we must ke 印 pace with the times and build up new creative education system , suitable for the economic globalization , for the ideological and political education in order to propel powerfully the full development of our country and human beings there are three main parts in this essay the first part mainly discusses the meaning and characters of economic globalization to deepen people ' s knowledge about economic globalization and the second illustrates the opportunities and challenges confronted by the ideological and political education caused by the economic globalization , so that the great importance and necessity of enforcement and improvement in the ideological and political education can be realized the last part states the innovation of ideological and political education under the background of economic globalization , focused on the analysis of five points : notion innovation , content innovation , m ~ hod innovation , carrier innovation and mechanism innovation

    經濟全球化對於思想政治教育來說,是一柄兩刃劍,既給新時期的思想政治教育提供了發展的機遇,同時又帶來了嚴峻的挑戰。因此,我們必須根據時代的特點和人們的思想變化,與時俱進,建立與經濟全球化相適應的思想政治教育創新體系,使思想政治教育更加有力地推動社會發展和人的全面發展。本文主要包括三個部分內容:第一部分介紹了經濟全球化的基本情況,加深人們對經濟全球化的認識;第二部分闡述了經濟全球化給我國思想政治教育帶來的機遇和挑戰,使人們認識到加強和改進思想政治教育的必要性和重要性;第三部分論述了經濟全球化背景下的思想政治教育的創新,著重從觀念創新、內容創新、方法創新、載體創新、機制創新五個方面進行分析。
  4. Based on the hydrodynamic energy transport model, the influence of variation of negative junction depth caused by concave depth on the characteristics of deep - sub - micron pmosfet has been studied. the results are explained by the interior physical mechanism and compared with that caused by the source / drain depth. research results indicate that with the increase of negative junction depth ( due to the increase of groove depth ), the threshold voltage increases, the sub - threshold characteristics and the drain current driving capability degrade, and the hot carrier immunity becomes better in deep - sub - micron pmosfet. the short - channel - effect suppression and hot - carrier - effect immunity are better, while the degradation of drain current driving ability is smaller than those with the increase of depth of negative junction caused by source / drain junction shallow. so the variation of concave depth is of great advantage to improve the characteristics of grooved - gate mosfet

    基於能量輸運模型對由凹槽深度改變引起的負結深的變化對深亞微米槽柵pmosfet性能的影響進行了分析,對所得結果從器件內部物理機制上進行了討論,最後與由漏源結深變化導致的負結深的改變對器件特性的影響進行了對比.研究結果表明隨著負結深(凹槽深度)的增大,槽柵器件的閾值電壓升高,亞閾斜率退化,漏極驅動能力減弱,器件短溝道效應的抑制更為有效,抗熱載流子性能的提高較大,且器件的漏極驅動能力的退化要比改變結深小.因此,改變槽深加大負結深更有利於器件性能的提高
  5. To reduce the harmonics in the line current, the random pwm mode is adapt. related to the typically constant pwm carrier frequency and its high harmonics, modulation of this frequency can be used to decrease emi and cost no more gain

    為了抑制輸入電流中一些幅值較大的諧波成分,利用dsp控制的特點,電路採用了隨機pwm方式,在不增加系統成本的前提下,有效地抑制了輸入電流的高次諧波含量。
  6. Account for the high electrical field induced from the high applied voltage relative to small dimension device, the mechanism of hot - carrier generation is analysed, the si - h bond broken model for hot - carrier injection and interface states generation is deduced and the substrate current model is developed

    基於mosfet偏壓不能按比例縮小所導致的高電場,對mosfet的熱載流子產生機理進行了分析,導出了熱載流子注入所引起的界面態的si - h健斷裂模型,並建立了表徵器件熱載流子效應的襯底電流模型。
  7. Based on the analysis of current situation of compulsory education and the social development characteristics in guangxi by taking the reference from foreign countries and the advanced experience in other regions in china, new curriculum system of guangxi compulsory education can be drawn out in five directions as followed : first, the traditional and obsolete curriculum concepts that curriculum is the process of learners " constructing their knowledge actively ; that curriculum is not only the carrier of the specified knowledge system but the show of the learners ' real life ; that curriculum is the whole world " s prospect, not the mixture of separated disciplines and that curriculum is not only the medium of transferring the national culture

    針對廣西自身的經濟社會發展特點和義務教育課程現狀,借鑒國際及國內其它地區課程改革的先進經驗,我們認為,廣西義務教育課程體系的未來發展方向是:第一,改變教師傳統、陳舊的課程觀念,樹立課程是學習者主動建構知識及意義的過程、課程不只是特定知識體系的載體還應該體現學習者的現實生活、課程是世界的整體圖景而不是分科知識的雜糅體、課程不僅是傳承而且是創新民族文化的手段的課程觀念。
  8. There are five parts are as follows : in part one, the concept of switching function is introduced first to establish the nonlinear mathematical model of the induction motor variable frequency speed adjustment system which is fed by a sine pulse width modulated ( spwm ) inverter and takes the effect of the main magnetic circuit saturation into consideration, then the low frequency oscillation of the system is simulated according to the model. next, from the view point of energy conversion of the inverter - induction system, a criterion for the low frequency oscillation is proposed to determine whether the system is in low frequency oscillation which is judged by whether the interval of the negative current component of the inverter input current is more than 1 / fc ( fc is the carrier wave frequency of the inverter ) or not

    首先引入開關函數概念,建立了正弦脈寬調制( spwm )逆變器供電異步電動機,考慮主磁路飽和時的變頻調速系統整體數學模型,模擬系統的低頻振蕩;其次從逆變器-異步電動機系統能量轉換角度出發,提出通過檢測逆變器輸入電流中負電流的間隔時間是否大於1 / f _ c ( f _ c為逆變器載波頻率)來判定系統是否出現低頻振蕩;最後的實驗結果驗證了系統低頻振蕩建模和判據的實用性和正確性。
  9. Carrier current channel

    載波通道
  10. This paper presented a general systematic view, application and current development of the power line carrier transmission technology, and clearly compared some existing power line carrier communication chip with each other. then the authors analyze the channel " s characters of low voltage power line, and formed an abstract carrier channel model. using this as its basis, a new kind of transmission technology is designed that adopted transmission technology combining the spread spectrum modulation with channel coding, which can solve the problems above mentioned to a certain degree, and need not pay for high cost

    文章不僅全面地介紹了電力線載波通訊技術的特點、應用及其發展狀況,還對目前的電力線載波通訊晶元進行了比較;並通過對低壓電網通道特性的分析和研究,抽象出其載波通道模型,在此基礎上,提出了將擴頻調制和通道編碼相結合的傳輸技術用於低壓電力線載波通信,這可以在很大程度上解決電力線的干擾問題,且不必付出高昂的代價。
  11. Carrier current protection

    高頻保護裝置
  12. Research on surface and grain boundary passivation mechanism obtained effects of surface recombination on crystalline silicon solar cell performance and the theoretical expression of grain boundary recombination velocity. the limit ratio of short - circuit current increment for anti - reflection coating utilization on solar cells was obtained. the crystalline silicon solar cell spectral response, contact resistance and minority carrier lifetime measurement systems were established

    鈍化機理研究獲得了表面復合對不同表面摻雜濃度晶體硅太陽電池性能的影響、表面和界面復合速度的理論表達式;研究得到了減反射膜對太陽電池短路電流增量比的極限;建立了太陽電池光譜響應、柵線電極接觸電阻和少子壽命等測試系統。
  13. After measuring dark current, photocurrent and response to x pulse of gaas detector before and after 1. 7 mev electronic radiation, the response tune, fall time of trailing edge, full width of half maximum ( fwhm ), sensitivity, carrier life, mobility are researched and contrasted. the result shows that the response speed of detector, time resolution ratio and nonlinear of back edge of output signal have been improved greatly after electronic radiation. though sensitivity of the detector reduces, its measuring range can be widened

    為了使探測器的性能得到進一步的提高,我們對其進行了電子輻照改性,並測量了本徵砷化鎵探測器和經過1 . 7mev電子輻照的探測器的暗電流、光電流及對x射線的脈沖響應,並對其響應時間,后沿下降時間,半高寬( fwhm ) ,載流子壽命,靈敏度進行對比,研究,結果顯示經電子輻照后的探測器的性能得到了改善,使響應速度,分辯率進一步提高,並消除了探測器輸出信號后沿的非線性,雖靈敏度有所降低,反而使其測量范圍得以拓寬。
  14. The forming of signals, such as those employed in telegraph transmission, by the interruption of a direct current or modulation of a carrier between discrete values of some characteristics

    斷開或接通直流電路或者在具有某些特點的離散值之間對載波進行調制而形成信號的過程和方法。如電報傳輸中使用的就是鍵控法。
  15. This d format can show the range of the data intuitively and express the real time data, which improves the speed and precision of svpwm arithmetic greatly. the ratio of carrier wave is increased and the blend of current is reduced, as a result the performance of the system is ameliorated. this thesis project has finished the debugging of the ac motor control system, and the result shows that hardware and software of the designed system is in reason

    在實現svpwm演算法的匯編程序中採用了一種新型的d定標法對標幺化的數值進行定標,這種d定標法能直觀的表示數值的大小范圍,可以實時的對數值進行定標,提高了svpwm演算法執行的精度和速度,增加了逆變器的載波比,減少了電流諧波,因而改善了交流變頻調速系統的性能。
  16. The main work can be summed up as follows : firstly, we studied the thermal - field properties of vcsels, and analyzed the influences of current spreading, material parameters and operating conditions on the temperature distributions. secondly, we began with the electrode voltage and calculated the equipotential s distributions, compared the distributions of voltages and current densities in different depths of vcsels, and then studied the influences of the oxide - confining region with different position or thickness, and the different sizes of the gain - guided aperture and emitting window on the distributions of the injected current density, carrier concentration and temperature in the active region. thirdly, we realized the coupling of electricity, optical and thermal - fields, worked out the threshold voltage, calculated the distributions of the injected current density, carrier concentration and temperature under different offset voltages, and analyzed the impacts of temperature profile and carrier density on the refractive index, fermi levels and optical - field

    具體工作可以概括如下:首先,研究了vcsel的熱場特性,分析了電流擴展,材料參數和工作條件對于溫度分佈的影響;其次,從電極電壓入手,計算出激光器中的等勢線分佈,並對不同深度處的電壓和電流分佈進行比較,研究了高阻區的不同位置和不同厚度、限制層和出射窗口半徑的大小對電流密度、載流子濃度和溫度分佈的影響;再次,實現了電、光、熱耦合,求出了閾值電壓,計算了不同偏置電壓下的電流密度分佈、載流子濃度分佈和熱場分佈,分析了溫度和載流子濃度變化對折射率、費米能級和光場的影響;最後,給出了考慮n - dbr和雙氧化限制層時激光器中的等勢線分佈,分析了n - dbr和雙氧化限制層對vcsel電流密度、載流子濃度、溫度和光場分佈的影響。
  17. Carrier current transmission

    載波電流傳輸
  18. Carrier current wave telegraph

    載波式電報
  19. Carrier - current telephone communication

    搬送電話通信方式
  20. Carrier current supply equipment

    搬送波電流共同供給裝置
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