估值的頻率 的英文怎麼說
中文拼音 [gūzhídebīnlǜ]
估值的頻率
英文
valuation frequency-
And then facing the problem of the channel estimation of the adaptive modulation system, we conclude out the channel estimation algorithms on maximum likelihood ( ml ) estimation and maximum a posteriori ( map ) estimation under the condition of flat fading channel and selective fading channel in detail. to meet flat fading channel, we simulate the relationship of the ratio between the error covariance in map estimation and ml estimation and pilot symbol message length. the conclusion can be drawn from these results
接著，對自適應調制系統中的通道估計問題難點，詳細推導了平衰落通道條件下和選擇性衰落通道條件下最大似然（ ml ）估計和最大后驗概率（ map ）估計演算法，針對平衰落通道，我們模擬了map估計和ml估計的方差與導頻符號長度的關系，模擬結果表明，錯誤方差受多譜勒頻率的變化影響最大，並且對實際的自適應調制系統，導頻符號長度的取值超過20個符號長度時， map通道估計明顯優于ml通道估計。Chapter 4 designs and determines the parameters of the algorithm adopted in the instrument system. analyzes and compares the different effects to frequency estimation when using digital filters with different group delay ; determines the data length, a parameter of frequency estimation ; introduces the method of available judgment of sensing signal and determines the judgment threshold as well
第四章設計和確定了儀器系統軟體演算法的部分參數：分析和比較了不同群延遲特性的數字濾波器對頻率估計的影響；確定了影響頻率估計參數?數據長度的取值規律；給出了判斷傳感信號有效性的檢測方法並確定了檢測門限的取值規律。( 3 ) it proved that the factors such as technology, market, management, fund and policy environment make different impaction on the result of the valuation of the investment opportunity of hi - tech enterprise during different developmental phases. ( 4 ) the competition intensity, the time lag of investment and the riskless rate make great negative impaction on the option value of hi - tech enterprise. ( 5 ) the conclusion of analysis achieved from which the varieties of the market supply and the market demand make impaction on the result of the valuation accord with the conclusion of analysis achieved from which the varieties impact to price on economics
本文的主要研究成果如下： （ 1 ）投資機會價值在高新技術企業價值評估中佔有重要的地位； （ 2 ）在提出的投資機會價值評估模型的基礎上，結合實際，深入探討隨機跳躍頻率下的評估結論對投資決策的影響； （ 3 ）從定性和定量兩個角度系統地說明了技術、市場、管理、資金及政策對評估結論的影響程度是隨著企業發展階段的不同而不同； （ 4 ）證明了外部競爭強度、投資的時滯和無風險利率對企業的期權價值評估產生極大的負影響，即外部競爭強度越強、投資的時滯越長和無風險利率越大，企業的期權價值就越低，反之就越高； （ 5 ）市場需求和供給的分析結果與從經濟學上的供需對產品價格的影響結論是一致的。The " simple " method based on cwt is inducted to underwater signal processing to estimate the instantaneous frequency of echo. in essential, this method is to extract the wavelet ridge from the maximum of continuous wavelet transform, according to the corresponding relationship between wavelet ridge and signal frequency, finally to obtain the estimated instantaneous frequency
文中將基於連續小波變換的『 simple 』方法引入到水下信號的瞬時頻率估計中來，也即通過尋求連續小波變換幅值的最大值來得到小波脊，再根據小波脊與信號頻率之間的對應關系，最終完成信號的瞬時頻率估計。Numerical results show that the ber performances of ideal mrc are the lower bounds on the ber performances of non - ideal mrc and deteriorate as the maximum doppler frequency increases or the snr of channel estimate decreases
數值分析結果表明，非理想通道估計下最大比合併的誤碼率性能是以理想通道估計的結果為下界，並隨著最大多普勒頻移的增加或通道估計信噪比的減小而逐漸劣化。Based on piecewise linear model, this paper proposes an estimation method that first estimates the slope of linear variant and the channel impulse response at the middle time of the current ofdm symbol using pilot sequences, and then estimates the whole channel impulse response through the estimated parameters
該演算法首先利用導頻序列估計出當前ofdm符號間隔內通道線性變化的斜率和中間時刻通道的沖激響應值，然後根據線性模型利用估計出的參數得到當前符號間隔內所有時刻上的通道沖激響應。And used this standard ( large than ex + 3 x x ) to estimate the design sub stage maximum tidal levels using the frequency analysis. an improved method to deduce design tidal level process is put forward, using both designs maximum anneal tidal level and design maximum annual tidal range
探討了不同參數估計方法下如何判別特大值，並用得到的判別標準（大於ex + 3 x ）對修正後的分期最高潮位序列進行頻率分析確定了分期設計最高潮位。提出了以設計年最高潮位和設計年最大潮差共同控制典型潮位過程放大的設計潮位過程推求方法，使設計潮位過程的推求更趨合理。( 3 ) the conventional interpolated dft algorithms are analyzed. a new method, which estimates frequency with high precision and fast rate compared with the mentioned methods for the real single tone based on dft, is presented
（ 3 ）在分析常規的插值演算法基礎上，提出了一種單信號的快速插值頻率估計方法，只需三個fft變換系數的實部構造頻率修正項，計算量低。The tradition hydrology frequency computation method is supposed that the universe is following the p - iii distribution. using the method of curve - fitting to estimate parameters according samples, and then get the design value
我們傳統的水文頻率計算方法一般都是假定總體服從p -型分佈，然後採用適線法根據樣本估計參數，進而推求設計值。Secondly, two carbon fiber reinforced composite beams were fabricated, and their modal frequencies were measured by an experiment method. thirdly, delaminations were modeled by pairs of nodes with the same coordinates but different node numbers, while the modal frequencies of these beams with different delamination location and size were computed by an eas piezoelectric solid element. moreover, a novel method combining computational mechanics and neural network was demonstrated for composite health monitoring ; the first five flexure modal frequencies obtained by fem were modified by a primary revising approach and were used to train the neural network
本文較全面地評述了神經網路的應用模型、改進演算法等，編制了bp神經網路程序：制備了纖維增強復合材料試件，並進行實驗模態分析；利用坐標相同、節點號不同的方法模擬脫層損傷，基於eas列式的壓電固體單元計算了不同脫層損傷情況下的頻率信息；針對基於實驗數據訓練神經網路存在樣本不足的缺陷，本文提出了利用有限元方法對含有脫層損傷的復合材料試件進行數值模擬，以前五階彎曲模態頻率構建訓練樣本的新思路，並提出了一種初步的計算值修正方法，以此構建神經網路的訓練樣本：將實驗模態分析的結果送入訓練好的神經網路進行預測，實現了對復合材料梁的脫層損傷的定位和損傷程度的評估。For the amplitude - frequency response at the self - oscillation frequency is one, a method to calculate the dynamic accuracy and the index of the servo system is provided, by comparing them, the scheme to design the verifying unit is presented
利用伺服系統在自振蕩頻率點的幅頻特性為1這一特點，將輸入信號頻率、幅值、系統的自振蕩狀態和系統的參數聯系起來，構建了伺服系統動態精度的計算公式和指標估算經驗公式，並根據兩者的關系提出動態精度校正方案。At the operating voltage and current less than rated values, the amplifier provides a maximum of 5. 94 - w ( continuous wave ) output power when driven into saturation. the average combining efficiency over the operating band was estimated at 82 %. the maximum combining - efficiency and the overall power - added efficiency ( pae ) is 87 % and 13. 6 %, respectively
該功率合成放大器在低於mmics功率單片額定工作值的情況下獲得了1 . 7ghz帶寬的最大飽和輸出功率5 . 94w （連續波） ;整個帶內合成效率估計平均為82 % ，最大合成效率達87 % ，功率相加效率（ pae ）約為13 . 6 % ;若電源達到mmics單片的額定值，估計最大輸出射頻功率將會達到7w 。Maximum value method is fast but not accurate, autocorrelation function method is accurate and have a good effect form radar image according to their estimate methods
在多普勒中心頻率估計中，最大值法簡單，但精度不高，自相關函數法有較高的估計精度。2. analyzed, simulated the effect of maximal value estimate method, coherent accumulating on ranging performance
2 .分析並模擬了頻率估計的最大值估值演算法和相干積累對系統測距性能的提高。Sinusoidal frequency estimation is the procedure which can estimate the frequency of sinusoidal waves in additive white gaussian noise through transform and calculation for signal ' s samples
正弦信號頻率估計是指通過對信號采樣值的計算和變換，估計出淹沒于噪聲中的信號的頻率的過程。The maximum likelihood estimator ( mle ) approach is an important one in frequency estimation domain. this approach has the merit such as exhibiting best performance and requiring minimum threshold of signal noise ratio in calculation
最大似然頻率估計法是該領域中的一種重要的研究方法；該方法具有估計結果準確，計算所要求的信噪比門限值低等特點。The problem of joint estimating the frequencies and time - delay of multiple sinusoids received at two separated sensors is considered. the frequencies are firstly estimated using a state - space realization approach. the tune - delay is then found using a direct - form esprit - like method. finally, the performance of the proposed algorithm is demonstrated via computer simulations using sinusoidals as well as real speech data
6 .在第七章提出了一種基於狀態空間實現的頻率、時延聯合估計演算法，正弦波的頻率首先用狀態過渡矩陣的特徵值估計得到，然後時延由估計的頻率和觀測矩陣直接給出。Based on the periodical characteristic of the two - dimensional spread spectrum matrix, the method estimates the frequency offset, and then synchronizes the symbol timing by moving the position of data - storage window to calculate the maximum eigenvalue of correlation matrix
該方法利用二維擴頻矩陣周期性重復的特點，先估計出頻率偏差，再通過滑動暫存窗求相關矩陣最大特徵值，完成信號的時間同步。According to the theory, the method that processes and analyzes flow signal and calculates the frequency of it and converts the frequency to flow is brought forward
通過對ar模型譜估計理論的研究，提出了用ar模型譜估計對流量信號進行處理和分析，然後計算出流量信號的頻率，最後換算成流量值的方法。This article is to develop autoregressive ( ar ) model spectrum estimation based on the theory of digital signal processing to analyze, process flow signal, to get the frequency of flow signal and then convert it to flow value. at last, the flow value is compared with the result that is gained by using count method
本文的主要目的是以數字信號處理的理論為基礎，採用自回歸（ autoregressive ，縮寫為ar ）模型譜估計的方法對渦街流量計的輸出信號進行分析和處理，得出流量信號的頻率，再換算成流量值，並將其與計數測量方法得出的結果進行了對比。分享友人