環路式 的英文怎麼說
中文拼音 [huánlùshì]
環路式
英文
ring system-
Chapter 3 discusses the modules used in the fh - mpsk and fh - / 4dqpsk systems. these modules include : duc / ddc ( digital up converter / digital down converter ), nyquist flitter, burst start detection, interpolation module, pll ( phase locked loop ), pll error extraction, initial phase correction and the coding and decoding for tcm
第三章主要討論了跳頻模式下fh - mpsk和fh - 4dqpsk系統中各個模塊的設計，這些模塊包括：上下變頻器、奈奎斯特濾波器、信號到達檢測、插值模塊、通用環路、各環路誤差提取方法、初始相位校正和tcm編譯碼。In this thesis, firstly, we put forward a new algorithm of the synchronization of carrier reference phase, that is to use the curve synthesizing with the general digital carrier phase looper to have an estimation on carrier frequency within 10 ms so as to meet the need of meteor burst communication. we have done some simulations to get the performance of carrier frequency estimation using two modulation modes ( 16qam and 4 - qpsk ), and had some test on the carrier phase looper in conditions when using different baud rate transmission and when the baud tuning have windage
我們對兩種正交調制方式（ 16qam和4 - qpsk ）進行了模擬工作並給出了模擬結果，同時討論了碼元同步定時誤差對鎖相環路工作的影響並根據流星通信中使用變速率傳輸時鎖相環路的載波同步性能進行了測試；然後在基於軟體無線電思想的數字處理平臺（該數字處理平臺實現了中頻數字化）上用dsp軟體完成了載波的相位跟蹤。The thesis will emphasize the design of loop circuits which comprise pfd, cp, lp and vco in chap3 - 5, and the analysis of loop performance is also very important
在整個設計過程中，作者針對當前集成電路的低功耗設計趨勢，採用了多種低壓電路結構，使得環路可以穩定的工作在各種採用電池供電的便攜式系統中。Accelerometer is used widely for measuring acceleration in civil and military field. at present, there are several type of accelerometers such as piezoelectricity electric charge accelerometer, ic piezoelectricity electric accelerometer, compressive resistance accelerometer and alteration capacitance accelerometer. the main part in alteration capacitance accelerometer is capacitance measurement circuit. foreign countries have produced accelerometer that have tiny volume and high performance. however, our country is not able to produce such accelerometer due to the lack of technique
加速度計作為一種測量加速度的儀器，在民用、軍用領域都有廣泛的應用。目前市場上的加速度計主要有壓電式電荷加速度計、集成電路式壓電加速度計、壓阻式加速度計、變電容式加速度計等幾種類型的加速度計。變電容式加速度計的設計中一個重要的環節就是電容檢測電路的設計。We discuss the formation of the unidirectional links and their influence on the manet routing protocols such as dsr, dsdv, aodv. solutions are given to overcom e the problems, we analyze some of they and point out their limitations. in the third part, we show a new on - demand routing strategy supported unidirectional links, it use the two circuits route search algorithms to establish the route from the source node to the destination and backward with directions ; it transfer the route error messages from the backward positions to the forward positions one by one ; it apply the packet encapsulation technique to forward the packets through the unidirectional links and introduced the circuit path to transmit information from the forward node to the backward node
接著，指出在移動自組網環境中，單向鏈路的普遍存在，分析了它的產生原因、它對目前協議棧的影響；然後，我們給出了一種按需路由的自組網單向鏈路路由演算法，它只有在需要路徑的時候才維護路由，使用二循環路由尋徑演算法以建立節點間的路徑，使用逐跳逆向傳遞的方式報告路由終斷，使用封裝廣播的方式沿單向鏈路正向傳輸，使用報文封裝方式支持單向鏈路下游節點向上游節點傳遞信息。Designed the dual - loop control circuit based on optimized psm, which realize to select the suitable duty ratio to make output stable by utilizing voltage and current feedback loops
3 ）設計基於優化psm調制模式的雙環控制電路。採用電壓、電流雙環路控制，根據負載情況選擇合適占空比來實現穩壓。Chengdou wangjiang hotel is the five - star water - round garden hotel, located in the historic culture city dongyu of chengdu city, near the two - circle road and chengyu highway. the hotel takes up an area of more than 200 mu, assemble thousands of kinds of flowers and trees of masterpiece, long - term green shade is covered densely, the birds and flowers are in riotous profusion ; a waterside pavilion of pavilion, the brook is murmuring, there are top - grade villas that are set off into it even more, the natural human cultural sight enhances each other s beauty, become garden type one of the hotels the city
成都望江賓館成都望江賓館是一家環水大園林五星級賓館，位於歷史文化名城成都市東隅，近鄰二環路和成渝高速公路，距飛機場15公里，火車站9公里，交通便捷。賓館佔地200餘畝，薈萃精品花木上千種，常年綠蔭濃蓋，花鳥繽紛亭臺水榭，溪流潺潺，更有高檔別墅掩映其中，自然人文景觀交相輝映，是成都市園林式賓館之一。This paper suggests that there is another better way to judge whether a system is stable or not - that is analyzing the amplification of loop circuit with the nyquist rule
由於激勵信號是復數形式的變化量，因此我們還可以採用奈奎斯特準則，利用奈奎斯特圖在復平面上的變化特點，對環路增益進行分析。The synchronous rectifying and low power sampling technology is used to reduce the power consumption, flexible external loop compensation, error amplifier output clamp are adopted for better system large signal response. the piecewise slope compensation technology is employed to minimize the consequence of over compensation. the sensor resistor is externally connected, which realize output voltage programmable. the overheat protection and under voltage protection modules are integrated in the die to allow the reliable operation of the system
同時，電路設計採用同步整流技術、低功耗電流采樣技術降低功耗，提高轉換效率;採用靈活的外部環路補償技術、誤差放大器輸出嵌位技術以實現良好大信號特性;採用分段斜坡補償技術，消除不穩定因素，並最大程度地減小過補償帶來的問題;採用外接輸出采樣電阻的方式，實現輸出電壓的可編程。Since commercial pll ic came out, phase - locked - loop frequency synthesis has become widely accepted. but when narrow frequency - step is required, the loop bandwidth has to decrease while cannot meet the demand of frequency - hopping speed
數字鎖相集成器件出現以來，鎖相式頻率合成器得到迅速發展，但是當需要窄頻率步進時，環路帶寬需要降低，致使鎖定時間變長，不能滿足快速跳頻的要求。Examining each circuit at each second in a cycle way is satisfactory. this, however, may rouse another problem - time difference, for a proper solution, path - management is adopted
我們的解決方案是對各條電話線路採用循環方式處理，即每秒依次對每條線路檢測，如果有摘機信號，則進行相應處理。The state - owned commercial bank having environmental conditions, we must carry out the reform greatly, step by step, in line with the successful experiences of the reform of the state - owned enterprises, taking the diversified network type of ownership of share structure as a basic model. we should build large, comprehensive, multinational group companies operated by transtrading with banking as their main business, gradually make the state - owned commercial bank suitable for the international financial system to strengthen their competition
現階段對國有商業銀行進行股份制改造已不存在理論和政策障礙，環境條件具備，應借鑒國企改革成功經驗，大膽改革，分步實施，以多元化網路式股權結構作為基本模式，培育以銀行業為主、跨行業經營的大型綜合性跨國集團公司，逐步使國有商業銀行與國際金融業制度對接，以全面增強其競爭實力。At the same time, the carbon cycle at mid - latitudes of north hemisphere still remains unknown, which leads people to nowhere in gaining a deep understanding of the mechanism of global change. in xilin river basin, inner mongolia, which is right located at the mid - latitudes of north hemisphere, the high speed of social - economic development shows high rate and strong intensity to land use / land cover change in the past two decades. in this paper, remote sensing, gis and ecological modeling techniques were combined to study the land use / land cover change and carbon cycle of xilin river basin
文章首先對內蒙古錫林河流域四個時期的landsattm / etm +影像進行土地利用/土地覆蓋分類、成圖；通過對比，分析了錫林河流域近20年的來的土地利用/土地覆蓋變化；並進一步運用gis方法研究了錫林河流域草地退化的演化路徑；最後運用century模型模擬了內蒙古錫林河流域大針茅草原、羊草草原的碳循環過程，繪制了其碳循環模式圖；並進一步分析了錫林河流域典型草原生態系統對大氣碳庫的源/匯功能。Based on the engineering practice of the waihuan station in shanghai urban mass transit line 9, this paper analyses the structure form of the deep foundation pit and the key - nodes design by using the top - down invert method, so as to optimize the engineering
摘要以上海軌道交通9號線外環路站為實例，介紹了部分逆築法施工的地鐵車站深墓坑圍護結構形式，及其結構設計；著重介紹了基坑圍護結構的計算模型設定、基坑穩定性計算，及圍護結構的基礎施工步驟。By citing distribution piping loss curve, analyses the two commonly used control methods of constant pump head and constant remote circuit differential pressure and considers that control with a constant remote circuit differential pressure is the better
通過提出輸配管壓損曲線概念，從理論上分析了計量供熱變流量系統循環水泵常用的恆揚程式控制制和恆定最不利環路壓降控制兩種方案，認為恆定最不利用戶資用壓力方案節能效果較好。Next, the global system architecture is presented upon the design requirements. due to the fact that constant current is required for driving led, as a result, different from conventional current - mode converter with both output voltage and inductor current feedback loop, the proposed converter adopt dual current feedback loop that both inductor current and output current are detected to provide a stable output current for led
在整體結構設計中，與典型的電流模式採用電感電流反饋環路和輸出電壓反饋環路不同，本文針對驅動led需要電流穩定的特點，採用雙電流反饋環路，即電感電流環路和負載led電流環路，這樣就能對負載led電流做出快速響應，通過反饋環路達到穩定led電流的目的。This thesis first studied the communication system with detailed theories so that to choose the appropriate method of modulation and demodulation. n / 4dqpsk is a kind of modulation method which is appropriate to transfer in the attenuated channel
/ 4dqpsk是一種比較適合在衰落通道中傳輸的調制方式，它不需要提取相干載波，因而不存在相位模糊、環路跳周等問題。Then according to the emphasis of the design, went deeply into the theory of pll frequency synthesizers widely used, described pll ’ s working principle, structure and several types in detail, and made research and analysis of pll frequency synthesizers ’ phase noise, including the effect of the active loop filter on the phase noise, and give some methods to make improvement as well, such as changing loop filter form, reducing divide number, and increase phase detector frequency, etc. then paper introduced the principle character and phase noise analysis of direct digital frequency synthesizer ( dds ) and injection phase lock circuit, which are also important circuits in the design
論文首先對幾十年頻率合成器的發展進行概述，而後針對本次設計的重點，對應用較為廣泛的鎖相頻率合成理論進行了深入的探討，詳細介紹了鎖相環的工作原理、組成結構和鎖相類型，並對鎖相頻率合成器的相噪特性進行了研究分析，包括有源環路濾波器對于相噪的影響，提出了改善相位噪聲的幾點措施:改善環路形式、降低分頻數、增大鑒相頻率等。接著介紹了直接數字頻率合成器（ dds ）和注入鎖相電路的原理特點以及相噪分析，它們也是本次設計的重要電路。At last we introduce the realization of all the parts, the problem in the circuit design and the measured data. the results show that the designed system has met the requirement. in this dissertation, direct digital synthesis technology has been used in the phase - locked frequency synthesizer, which can make full use of the characteristics of direct digital synthesis technology such as flexible output wave shape and continuous
本課題將直接數字式合成技術用於鎖相頻率合成器中，該方法將直接數字合成的特點，如輸出波形靈活且相位連續、頻率穩定度高、輸出頻率解析度高、頻率轉換速度快、輸出相位噪聲低、集成度高、功耗低、體積小等與鎖相環路的頻帶寬、工作頻率高、頻譜質量好等優點有機的結合起來，從而在寬帶的條件下實現了比較好的雜散性能和相噪。2. as for the intermediate frequency part in integrated circuits ( ic ' s ), we introduce feedback automatic gain control ( agc ) loop in view of its fargoing dynamic range and convenient precision adjustment, hence stable power of fore - demodulator signal and maximum systematic gain are ensured
2 、中頻部分採用集成電路的反饋式自動增益放大環路，動態控制范圍大，控制精度調節簡便，是系統增益的最大來源，同時也保證了中頻解調器前信號的功率穩定。分享友人