階式信號 的英文怎麼說
中文拼音 [jiēshìxìnháo]
階式信號
英文
ste ignal-
This method can reflect local signal feature and well perform in the experiments. we also present an integrated electromyographic signal ( emg ) pattern recognition scheme. the application of an artificial neural network ( ann ) technique together with a feature extraction technique, for the classification of emg signals is described
利用高階譜技術提取肌電信號的特徵信息，然後利用奇異值或者其它方法對二維特徵矩陣進行優化，將優化之後的一維特徵向量輸入神經網路分類器進行模式識別，這種方法能夠初步識別不同模式的上肢運動。A conception of phase dynamic coupling is defined. the foc of the mot - radiated line spectrum signals is theoretically derived
在研究中，定義了相位動態耦合的概念，推導了水下運動目標輻射線譜信號的四階累積量表徵公式。Control valve response measurement from step inputs
階式信號輸入控制閥反應測量Traffic control system separates and organises the traffic flow in time and traffic flow guidance system, which is another key subsystem of its, separates the traffic in space
為適應交通信號數量的增多，交通信號控制結構經歷了集中控制、分層遞階控制、分散式控制的發展過程。Desting of current - mode universal aactive filter using signal flow gragh
多功能電流模式二階有源濾波器的信號流圖法設計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） 。Dynamic weighing system is as a second - order system and set it up model, then has its transform function laplace transform and z transform, at last has a formula that m is only relation to the system parameters. this article has system identified with the recursive least square ( rls ) method, and has the system parameters, while the auto - regressive - moving - average ( arma ) model for the second order weighing system is firstly derived. and has a equation which the mass is only correlation to the system parameters
論文具體分析了定量稱量問題，首先是把稱量系統看作是一個二階系統，建立數學模后，進行拉普拉斯變換和z變換后得出一個質量僅與系統參數有關的關系式，從而把稱量問題轉化為一個系統參數識別問題來解決。通過編寫的程序來採集系統信號並進行處理（運用漸消遞推最小二乘法）對系統參數進行識別，從而得出稱量結果。In the aspect of blind - identification, the mutual power spectrumx time - frequency distribution product of two delay signals are used as the features of classification. the cluster analysis and cumulant invariants of mpsk signals are used to automatically classify communication signals
在信號識別中，選取信號的互功率譜、時頻分佈、 mpsk信號的延遲相乘信號作為分類特徵，利用模式識別中的聚類分析以及mpsk信號的基於高階累積量構成的分類特徵不變量實現了信號調制類型的自動分類。A powerful tool of dynamical system analysis named normal form method is presented in this dissertation, and then it was used to analyze oscillation phenomena in interconnected power grids. using nonlinear coordinate transformation of normal forms, a fully described power system can be converted to an equivalent reduced order model, which can still use the conventional modal analysis of small signal stability problems
論文將動力系統非線性分析的正規形理論應用於互聯系統低頻振蕩分析中，利用正規形方法的非線性坐標變換，將高階電力系統轉化為等價的低階系統，在保留非線性信息的同時，使其仍然可以使用常規小信號穩定研究的模式分析方法。One is to use fourier transformation to convert the source signal from time domain to frequency domain and to discard high frequency harmonious components upwards of 19 ( gb / t14953 - 93 d5. 3 demanding ), then to have static huffman coding to the quantized char array which is composed of reserved direct current component and basic wave and each high frequency " s amplitudes and angles. the other is to use discrete wavelet transformation to convert the source signal from time domain to frequency domain and to set the high frequency coefficients that its absolute value is smaller than the given threshold to zero, then to have dynamic huffman coding to the quantized char array which is composed of multiple, wavelet ' s level, datum length, low frequency coefficients and reserved high frequency coefficients. mass simulinks and analyses under the two circumstances have done to show that data compression ratio is small and the relative error is also small and within the permission of engineering and the compression problem can be solved in theory of measured datum of power system
第一種情況的壓縮方法為：採用傳統的傅立葉變換把原始信號從時間域變換到頻率域，舍棄20次及其以上的高次諧波成分（保證了gb / t14953 ? 93d5 . 3要求） ，然後對保留的直流分量、基波和各次諧波的幅值和相角數據量化后和量化時分別乘以的倍數系數構成一個數組，以字元形式保存，採用靜態huffman編碼對變換數據進行壓縮；採用離散小波變換把原始信號從時間域變換到頻率域，然後對分解得到的高頻系數進行閾值量化處理，對乘以的倍數系數、小波變換的階數、小波變換后的低頻、各級高頻以及原始數據長度、量化后的低頻系數以及保留的高頻系數大小、位置構成一個數組，以字元形式保存，採用動態huffman編碼對這個文件進行壓縮。Based on the above mentioned, from the point of spatial - frequency domain, the paper analyzes the change of light field intensity in different phases when optical signal of fundamental mode transmits hi awg the general expression of awg ' s transimission characteristics is obtained
以此為基礎，論文從空間頻域的角度分析了基模光信號在通過awg的過程中各個階段的光場強度變化情況，得到了awc的傳輸特性的一般表達式，並討論了awg的相干系統特性。Secondly, basing on the theory of on - off gain of small signal, the raman gain coefficient for frequency shift between 0. 5 and 20 thz of standard sigle mode optical fiber is measured by pump - probe method through a super luminescent diode ( sld ) as a broadband small signal probe source. thirdly, numerical simulation analysis of gain characteristic of raman fiber amplifier for c band wdm signal light is made according to the raman gain coefficient of the fiber measured before through target and four rank runge - kutta method. at the invariability of wavelength and maximum power of each of two pumps, schematic of powers of two pumps for best flatness on c band wdm optical gain was found out, at the same time, the factors of resulting in gain saturation is analyzed, too
本文首先應用經典的電磁理論對拉曼光纖放大器的工作機制進行了分析，然後，根據小信號理論推導出的開關增益求出了光纖拉曼增益系數的表達式，採用泵浦-探測波的方法，利用超輻射激光二極體（ superluminescentdiode簡稱sld ）作為探測光源，測量了所用標準單模光纖頻移為0 . 5 - 20thz的拉曼增益系數，之後根據所測得的光纖的拉曼增益系數譜對應用該類光纖構成的放大c波段wdm光信號的拉曼光纖放大器的增益特性採用打靶法和四階龍格- - -庫塔進行了數值計算，在給定了兩個泵浦光源的波長和最大功率后，找出了反向泵浦情況下使c波段wdm光源增益最平坦的兩個泵浦的各自最佳功率，同時也分析了導致信號光飽和的原因。For the digital modulation recognizer, the blind identification and equalization algorithm based on second - order statistics is applied to equalize the received signals firstly, and then the modulation type used can be figured out according to the shape of the rebuilt constellation
對于數字調制方式，本文首先採用基於二階統計量的通道盲均衡演算法對接收信號進行均衡，再利用信號星座圖的形狀判別具體的調制類型。Although the work is based on the nonstationary signal of quadratic phase, the methods can also be extended to higher - order polynomial phase signal
論文的研究雖然是基於不高於二次相位項的非平穩信號，但是其思想方法也可以推廣到更高階的多項式相位信號。The research resuits mainly include : credit capital is not equal with stock capital, low risk capital structure is one strategic choice and competition advantage ; more capital from the core stocanolder and famous investment institution, more easier the company can finance ; relationship lending is one important credit financing means for internet company ; from the point of tfade - off theory, conservative capital structllre is suitable for intcmet company presently ; small proportion is preferable when liability level is readjusted, since it is easier to access the optimal capital structure.
主要內容包括：債權資金與股權資金不對等，不可以完全替代；低風險的融資結構是一種戰略性選擇；核心股東增加投資和廣大具有市場影響力的機構投資者投資網路公司都是傳遞公司價值的信號；關系型貸款是重要的債權融資方式；從權衡的角度看，現階段宜選擇保守型融資結構；調整負債水平宜採取謹慎小幅度的策略，這樣更容易接近最佳融資結構。First of all, by establishing the observation model of complex harmonic signal and complex linear chirp signal respectively under the co - jamming of additive and multiply noise, the paper constructed cyclic moment detectors of different orders, deduced snr expression of the detector through theoretic analysis, discussed the relation of detector performance and noise statistical characteristic. the curve of detection performance is obtained through monte carlo simulation test, proving the related conclusion derived
首先，論文分別以加性和乘性噪聲聯合干擾下的復諧波信號和復線性調頻信號為觀測模型，構造了基於不同階次的循環矩檢測統計量，從理論上推導出了檢測器的信噪比表達式，分析了檢測器性能與噪聲統計特性的關系，通過monte - carlo模擬試驗得到了檢測性能的曲線，驗證了推導的有關結論。The cyclic estimation approaches of chirp signals in additive nose or multiplicative noise are proposed, it presents a way for the parameters estimation of zero mean amplitude chirp signals. the estimation performances in the additive noise or multiplicative noise are analyzed by the first order perturbation analysis method, and the error variance expressions of the parameters estimation under large samples are derived
針對加性噪聲情況及存在乘性噪聲的情況，提出了線性調頻信號參數的循環平穩估計方法，解決了零均值乘性噪聲的信號參數估計問題，並採用一階擾動分析方法，對兩種噪聲情況下的估計性能進行了分析，推導出了各參數的估計誤差方差公式。This frame consists of two layers of contents. first, seen from the process of m & a, crisis control must run through all the stages of m & a including the design, implementation and reorganization, especially, the price - fixing, financing and payment during the implementation. second, seen from the trade policy making, crisis control must be carried out dynamically based on information transmission and the strategy for m & a must be adjusted now and then in accordance with the information from the other party
這一框架包含了兩個層次的內容：一是從並購流程上看，風險控制必須貫穿于並購設計-交易執行-並購整合三個階段，尤其是交易執行階段的定價、融資和支付三個環節，進行動態過程式控制制；二是從交易決策上看，風險控制必須以信息傳遞為基礎，並根據對方行為信號來不斷調整自己的行動戰略，進行動態決策控制。And then, adopting the same model, cyclic moment estimation statistic of different orders are constructed respectively, large sample variance expressions of the estimator through theoretic analysis are derived, as well as the constraint relation of estimator performance and noise statistical characteristic. the curve of estimation performance is obtained through monte carlo simulation test, which proves the related conclusion derived
然後，論文同樣以加性和乘性噪聲聯合干擾下的復諧波信號和復線性調頻信號為觀測模型，分別構造了基於不同階次的循環矩估計量，從理論上推導出了估計量的大樣本方差表達式，分析了估計量性能與噪聲統計特性的約束關系，通過monte - carlo模擬試驗得到了估計性能的曲線，驗證了推導的有關結論。Take the hoc based blind modulation detection algorithm as an example, the relationship between the blind modulation detection algorithm and synchronization is investigated. an unproved detection algorithm robust to frequency offset is proposed which solves the problem caused by the error in carrier synchronization. how to synchronize a received signal with unknown modulation type is studied and a blind algorithm to estimate symbol timing of the signals with unknown modulation type is presented
研究了載波同步和碼元定時同步與調制方式盲檢測演算法的關系；以自適應單載波中高階累積量調制方式盲檢測演算法為例，對于載波同步誤差引起的頻偏問題，提出一種基於頻偏穩健的mdpsk信號調制方式盲檢測演算法；對于未知調制方式信號的定時同步問題，提出一種盲定時估計演算法，該演算法可以估計mdpsk和mqam信號的定時同步信息，實現數字信號的同步分類；提出了一種基於調制方式盲檢測的自適應接收機結構，把調制方式盲檢測，信噪比估計和同步解調聯合起來進行，實現調制方式隨通道質量而自適應變化的信號的正確接收。分享友人