high-low signal 中文意思是什麼
high-low signal
解釋
大小信號-
Acutely ( within hours of the ictus ), the t1 - weighted images usually demonstrate abnormally low signal ; the t2 - weighted images abnormally high signal
急性期（發病數小時內） ， t1加權像顯示異常低信號； t2加權像顯示異常高信號。 -
3 high frequency signal low insert loss, high isolation, high flatness index inside
3高頻信號插入損耗低隔離度高帶內平坦度指標高 -
This paper addresses the issue of detecting and tracking small moving targets in infrared ( ir ) image sequences, which is a hard work due to the high variability of target types and low signal - to - noise ratio
現代海戰中，低空、超低空掠海導彈對艦船構成主要威脅。因此，對其實施有效防禦已成為各國海軍密切關注的重大課題。紅外目標的檢測跟蹤是艦船和岸基警戒系統的關鍵組成部分。 -
On mri, the tumor showed a slightly low signal on t1 - weighted images, a high signal on t2 - weighted images, and poor enhancement after gadolinium injection
磁振造影檢查，這類腫瘤在t1影像是呈現低訊號強度， t2影像是呈現稍微高訊號強度，打過顯影劑以後腫瘤只呈現輕微的顯影。 -
Become a kind of new electronics circuit - current - mode circuit. it is replacing the traditional design method of the voltage - mode in the high frequency high - speed signal processing realm 。 this thesis mainly discussed the modified second - generation current conveyors based on the current - mode kinds of new cuicuit components, they are stronger modified standard current - mode parts in fuctions on this foundation. mainly including the modified differential difference current conveyor ( mddccii ) 、 the fully balanced second generation current conveyor ( fbccii ) 、 ( full balances ) four - terminal floating nullor ( fbftfn ) and the current differencing buffered amplifier ( cdba ), they are all function very strong standard current - mode parts, they all can provide some circuit functions of better than general operation amplifier, because they have the voltage importation and the current importation, therefore use it since can carry out the voltage - mode signal processing circuit expediently, can also carry out the current - mode signal processing circuit expediently, and have to increase the benefit bandwidth to accumulate more widely than the voltage - mode, but have their advantages more according to the current - mode filter of the modified current conveyor, because it constitutes in brief, the filter wave function is stronger and they are better than in general use operation amplifier of many advantages, be easy to composing for example 、 high speed 、 frequency bandwidth 、 the power supply voltage requests low 、 consume small, the impedance is different from etc. advantages, otherwise they have biggish dynamic range, and flexible circuit synthesize, so they are the best active parts
從第二代電流傳輸器ccii入手，重點研究了以下幾種改進型的第二代電流傳輸器:改進的差動差分電流傳輸器mddccii 、全平衡第二代電流傳輸器fbccii 、多輸出四端浮地零器ftfn 、全平衡四端浮地零器fbftfn 、電流差分緩沖放大器cdba的電路結構及其模型。然後在此基礎上系統地研究了基於這幾種改進型的第二代電流傳輸器的濾波器的設計方法，主要方法和結果如下:利用mddccii設計了差分式連續時間電流模式低通、帶通濾波器;電流模式跳耦結構考爾低通濾波器;利用fbccii設計了帶通二階節濾波器及電流模式雙二階通用濾波器;設計了基於多輸出端ftfn的電流模式二階通用濾波器電路;通過數字化開關選擇的基於fbftfn的電流模式通用濾波器;設計了基於最少個數電流緩沖放大器（兩個cdba ）的多功能通用電流模式濾波器及其在非理想因素情況下分析。設計濾波器的主要方法是採用級聯設計、運算模擬（信號流圖法）和反饋設計（跳耦法） 。 -
Because of the advantages pf no range blind area, high range resolution and low signal power, recently lfmcw radars attracted more and more attention. the theories, key technologies and application develop rapidly
線性調頻連續波雷達由於具有無距離盲區、高距離解析度、低發射功率等方面的優點，近年來受到廣泛關注，其理論、關鍵技術和應用得到迅速發展。 -
With the development of reducing noise technology and the advent of quieter targets, sonar faces up to the challenge of low signal - to - noise ratio detection while high detection performance is demanded by weapons ' s increasing range. moving target detection is two of first and last of sonar " four main tasks : detection, loacalization, classification and tracking / motion analysis of targets, which is the base of other two functions
隨著降噪技術的發展，安靜型目標的出現，聲納技術面臨低信噪比的挑戰，武器射程的增加又對聲納提出了更高的要求，關繫到聲納的四大功能（檢測、定位、識別和跟蹤/目標運動分析）第一和第四個的運動目標檢測任務重大，因為它對其餘兩個起著基礎性的指導作用。 -
The device has two parts, signal measurement and launching circuit of high voltage, signal receiving and dealing of the low - voltage
本裝置分為兩個部分，一是高壓側的信號測量與發射電路，另一部分是低壓側的信號接收和處理。 -
In view of characteristics of seismic data of gobi - sand dune areas, this paper, through various data - processing means such as quality control, high - pass filltering, dip angle filltering, field static correction, surface consistency deconvolution, precise velocity analysis, denoising before stack, multiple iterative operation of residual static correction, denoising after stack and modification after shift, has raised the data quality of seismic profiles in low signal - to - noise ratio areas and managed to form the seismic data - processing technique for such complex areas as gobi, foreland and dune
摘要針對戈壁、沙丘地區地震資料的特點，通過對原始資料進行質量控制、高通濾波、傾角濾波、野外靜校正、地表一致性反褶積、精細速度分析、疊前去噪、剩餘靜校正多次迭代、疊後去噪和偏後修飾等處理，提高了低信噪比地區地震剖面的資料質量，摸索出了一套戈壁、山前、沙丘等復雜地區地震資料處理技術。 -
Because of the advantages of no range blind area, high range resolution, low signal power and simple structure, lfmcw ( linear frequency modulation continuous wave ) radar attracted more and more attention recently
線性調頻連續波（ lfmcw ）雷達是一種通過對連續波進行頻率調制來獲得距離與速度信息的雷達體制系統。由於其具有無距離盲區、高距離解析度、低發射功率、結構簡單，便於集成化等優點，適合用於液位測量系統。 -
The circui t construct ion and the relevan t schemes of the realization of the circuit are also provided, simultaneously, the source of errors and the compensation methods are discussed. all of analysises, calculation results and simulations demonstrate that the methods presented in the paper are feasible, the algorithm is effective, the realization of circuit is simple, the procedures of the design are standard, the circuit is easy to be fabricated on a monolithic, and the system can be used for processing middle - high frequence signal and be applied in low - voltage, low - power and at high speed
在此基礎上，本文首次提出了一種基於狀態空間對數域濾波器的一維連續小波變換實現方法、結構以及相關模塊電路實現的策略，並對該方法的誤差來源與補償措施進行了討論。論文中的理論分析與計算以及模擬結果表明，用對數域狀態空間濾波器實現一維連續小波變換的方法可行，演算法簡單、有效，電路實現簡單，設汁過程規整，易於單片集成，適合處理中、高頻信號並運用於低電壓、低功耗、高速的場合。 -
In the broadband incoherent beamspace high resolution method, the outputs of mvdr beamformers are used to suppress the interference from outside the beam coverage region in each subband. computer simulation results show good performance at low signal to noise ratio ( snr )
該方法克服了基於預成恆定束寬波束輸出的寬帶相干高分辨處理方法不能有效抑制波束區域之外強于擾的不足，模擬結果表明該方法在低信噪比具有良好的性能c -
There is a pll ( phase locked loops ) in system to get a high - stability low - noise high - frequency signal
固定頻率振蕩器通常採用鎖相環技術來獲得高穩定度、低相位噪聲的高頻輸出信號。 -
Moreover, it extensive applied the interpret way of contrast of high low frequency sectioned to eliminate the false and retain the true in the project, avoiding drop valid signal result to irrelevant disposal way. maintain use new information, contrast old information, integrated explain to forecast favorable oil and gas concentration zone, to instruct development work of yushulin oilfield
另外，課題中廣泛應用了高低頻剖面對比解釋方法，去偽存真，避免了處理手段不當造成的有效信號丟失，堅持客觀應用新資料、對比老資料，綜合解釋，預測有利的油氣富集區，以指導榆樹林油田的區塊優選和經濟有效開發。 -
How to improve the accuracy of flux observer is very important in high - performance motor system, especially at low - speed or zero - speed situation. high - frequency signal injection is believed the efficient method to solve these difficuilties
高頻信號注入來實現極低速甚至零速情況下磁鏈位置的觀測是目前該領域的熱點研究內容，本文採用的是d - q軸阻抗差異法。 -
However, performance is limited by the low signal - to - noise ( snr ) and high date rate. a potential solution is to add a strong error correcting code. so studying the error correcting code on uwb system is necessary and worthy
但是超寬帶信號頻譜寬、功率低且傳輸速率很高，使其更容易受到各種干擾而影響傳輸質量，所以在超寬帶系統中研究通道編解碼技術變得非常必要和有價值。 -
High - low signal selector
高低信號選擇器 -
Then the difference of data transmission speed between inside and outside of current cmos chips has been a bottleneck influencing the performance of computer systems. lvds ( low voltage differential signaling ) is an international common interface sdandard that applied to high speed signal transmitter
低電壓差分信號lvds是一個用於高速信號傳輸的國際通用介面標準，同時具有高速度、低噪聲、低功耗和低成本的突出優點。 -
Continuous - time analog filter is the only method when processing high frequency signal ( usually above 1mhz ) in low power consumption. it has been widely used in the area of communication, electronic measurement, instruments, autocontrol, etc. it ’ s especially used in digital and analog mixed signal processing and communication integrated circuit. current - mode filter becomes the new research direction in the world, as it ’ s high speed, low power consumption and simple configuration
提出了基於ota的多功能電流模式雙二階濾波器，基於ota的八階切比雪夫濾波器，用模擬lc梯形電路法設計橢圓低通濾波器時，在傳統的狀態變量選取方法的基礎上，用改進后的狀態變量選取方法得到了（ k + 1 ）階橢圓函數低通濾波器的簡化信號流圖，實現了簡化的基於ota的橢圓低通濾波器電路。 -
In general, fpga is mostly used in high - speed communications systems or high - speed signal processing systems because of its high - speedly and parallel architecture. however, in this thesis, it was applied to a low - speed and low power consumption system - a underwater long - range remote control reception system to realize decoding of remote control instructions in the frequency domain, and made the satisfactory result
一般來講， fpga多用於高速通信和高速信號處理領域，以發揮其處理速度快的特點，本文將其應用於一低速低功耗系統? ?某水下遠程遙控接收系統，主要用其在頻域來實現水下遠程遙控的解碼，取得了令人滿意的效果。
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