signal detection and analysis 中文意思是什麼
signal detection and analysis
解釋
信號檢測和分析-
Based on the analysis of the beat frequency signal, the expression of the beat frequency phase is deduced. the expression indicates physics meanings of quantities to be detected and supplies theoretical bases for detection methods. by using two - dimensional fft, the range and velocity information of target is got out from the echo. according to the periodicity range ambiguity of symmetrical pulses in fmpcw, the processing method of sliding time window is used
通過對差頻信號進行的分析，得出了差頻相位的具體表達式，表現出了要檢測的各量的物理意義，對檢測的方法提供了理論依據。利用二維fft方法，可以有效地提取回波中目標的距離與速度信息。對于fmpcw信號由於均勻脈沖產生的周期性距離模糊的問題，採取時間波門的處理方法。 -
This dissertation is focus on the temperature sensitive mechanism of the brillouin - scattering signal and on the basis of domestic techniques, the methods and approaches of signal detection and processing in distributed brillouin fiber - optical sensor system. a digital multi - point average method ( digital boxcar ) has been proposed based on the characteristics and the sorts of fiber - optical sensors and by analysis the feature of the brillouin - scattering signal, and also comparisons of all sorts of weak - signal detection theory
論文在全面了解光纖傳感器的分類和特點及分散式光纖傳感器的原理和發展歷程的基礎上，通過分析被檢測的光纖布里淵後向散射信號的特點，研究和比較了微弱信號檢測的各種方法，最終選定了多點數字信號平均（數字boxcar ）的處理方案。 -
When blanket jamming is used, the more the ratio between the power of jamming and the power of signal, the less detection probability of the radar is. the effect of distributed jamming mainly depends on the total power. after distributed, the randomicity of distance and phase of jamming source bring difficulties to analysis
對壓制式干擾來講，干信比越大，雷達的發現目標的概率就越小，由於分散式干擾的干擾效能在於其合成功率，在分散式干擾單元分佈之後，各個干擾源與被干擾對象之間的距離的不確定性，帶來了干擾信號相位的不確定性，增加了分析干擾效能的復雜度。 -
The expressed product was lysised with supersonic wave and purified by sds - page. elisa analysis revealed that the antigenicity of the vpi protein has been detected. the forth part - detection of aev - nh937 strain by in situ hybridization ( 1sh ) - probe was labelled with digoxigenin ( dig ). then the probe hybrid with 5d, 10d, and 20d postinfection brain tissue of chicken. the results of the ish showed that the positive signal was found in 3 cases, while control group was negative. there has been a reasonable correlatien between this method and other detection test
經超聲波裂解，用尿素溶解包涵體，電泳純化后，利用elisa檢測vp _ 1外殼蛋白，表明具有一定抗原性；第四部分：應用原位雜交檢測aevi用dig標記的探針與sd 、 10d 、 20d的攻毒雞腦組織雜交，來檢測那v的rna 。 -
The method and performance according to the requirements are resolved mostly. main contents as follows : ( 1 ) according to the demodulation guideline, a differential detection system is applied to the dpsk signal demodulator, which is based on the analysis and comparison using the principle of optimal binary signal detection
著重解決在皮衛星體積結構，重量和功耗限制條件下的方案選擇和性能問題，具體內容包括： （ 1 ）對一般二進制信號的最佳檢測原理進行分析比較，針對本系統要求選擇了dpsk信號差分檢測系統的方案。 -
Linear time - frequency analysis and its application in weak signal detection
線性時頻分析在弱信號檢測中的應用 -
Analysis of ambiguity - function of lfmcw radar, including symmetrical triangular lfmcw signal and multiple periods ’ symmetrical triangular lfmcw signal. 3. this dissertation advances new theories of lfmcw radar signal detection and estimation, including method for acceleration and velocity estimation based on polynomial phase transform ; method for multi - target acceleration and velocity estimation based on modification polynomial phase transform
包括基於多項相位變換的lfmcw雷達速度和加速度估計方法;基於修正多項相位變換的多目標lfmcw雷達速度和加速度估計方法;基於一般高斯噪聲環境下的lfmcw雷達速度和加速度聯合估計方法;另外提出了基於頻域增采樣內插方法以提高lfmcw雷達測距精度。 -
Wavelet transform is a kind of time - frequency analysis method in signal processing and is becoming more and more popular during these years. its multi - scale property, localization both in time and frequency domain, sensitivity to the abrupt change of signals, and good to denoising make it an ideal way for edge detection
近幾年來迅速發展起來的小波分析，由於其具有時頻局部變換的特性及多尺度性，能敏感地反映突變信號及良好的去噪效果，因此能準確、有效地確定圖象邊緣位置，因此是一種理想的邊緣檢測方法。 -
This paper analyses deterioration model of bar code signals after the point spread function convolution, and presents two kinds of recognition algorithm in correspondence to different bluring degrees of bar code signal : one based on midpoints detection and the other based on waveform analysis
分析了條碼信號經過點擴展函數卷積后的降質模型。針對條碼信號模糊程度的不同，提出兩種識別方法：基於中點檢測的條碼識別方法和基於波形分析的條碼識別方法。 -
The dissertation mainly aims at applying several active machine learning strategies to intrusion detection and systematically studies signal analysis techniques of intrusion detection based on statistical learning theory ( slt ), symbol inductive learning theory and genetic learning method. meanwhile, performance comparison and evaluation among intrusion detection techniques based on different machine learning strategies are presented according to computational learning theory and statistical hypothesis test methodology. intrusion detection is regarded as a pattern recognition problem in term of statistical learning theory ; i
本文的主要工作是將目前幾種有生命力的機器學習策略應用於入侵檢測技術中，論文從入侵檢測的不同視角出發，系統深入地研究了統計學習理論、基於符號的歸納學習理論和遺傳學習方法在入侵檢測信號分析中的應用技術，並在可能近似正確（ pac ）學習框架下，利用計算學習理論和統計假設檢驗方法對基於不同機器學習策略的入侵檢測方法進行了性能比較和評估。 -
For fh signals, we proposed two algorithms too, one is a signal detection algorithm based multiple - hop autocorrelation ( mhac ) of fh signals, and the other is a parameter estimation algorithm based on time - frequency analysis
對跳頻（ fh ）信號，本文提出了基於多跳自相關的信號檢測方法和基於時頻分析的跳頻參數估計方法。 -
Based on the analysis of echo signal and ambiguity function of lfmcw radar, this dissertation advances new theories of lfmcw radar signal detection and estimation and eliminates range - velocity coupling using mtd - frequency domain pairing
在對lfmcw雷達回波信號和lfmcw雷達模糊函數進行分析的基礎上，提出了lfmcw雷達目標檢測與參數估計方法，並利用mtd -頻域配對法消除lfmcw雷達距離-速度耦合。 -
The second is that the upper computer receives the data sending by the communication software to realize the intelligent detection of net structure. the functions include the displaying of the channels of the data acquisition, the displaying of the curve of the acquiring data, the online and offline data analysis, the saving of acquiring data file, the data file management of hard disk and the configuration file ; the third is that it realizes the time analysis, fft and hilbert by intermixing visual c + + 6. 0 with matlab, which has the strong ability with data analysis, signal processing and graphic displaying, data processing and plenty of tools boxes. it implements these functions including fft and hilbert w ithout using matlab again in the environment of visual c + + 6. 0
上位機監測軟體功能包括通道數據實時顯示、數據實時曲線生成並顯示、實時數據分析、離線數據分析、數據文件保存、磁盤數據文件管理及配置文件管理； （ 3 ）使用visualc + + 6 . 0語言作監測系統的實時數據分析的軟體設計，並結合matlab的強大的數值分析、矩陣運算、信號處理和圖形顯示功能及其強大的數據處理能力和豐富的工具箱使數據分析工具，脫離matlab環境，實現visualc + + 6 . 0和matlab混和編程，實現採集的數據實時以及離線時域分析、傅立葉分析和小波分析。 -
In this paper, the principle of spread sequence communication and all kind of the current multi - user detection techniques and the independent component analysis ( ica ) algorithm are respectively analyzed completely in chapter ii, chapter iii and chapter iv. based on the statistical feature of multi - user signal that the signal of every user ' s and every channel is statistical independent with each other and take the same distribution, the mathematical model of the received multi - user signal is fully researched, then the blind signal detection algorithm is introduced into the multi - user signal detection, two new algorithms of multi - user detection are proposed : multi - user detection based on the delay estimation of downlink using ica in ds - cdma and based on ica post processing matched filter multi - user detection
本文比較全面的從第二章到第四章分別介紹了cdma擴頻通信的原理和現有的各種多用戶檢測技術以及獨立分量分析（ ica : independentcomponentanalysis ）這種盲源分離演算法，並在此基礎上，從多用戶信號的統計獨立同分佈的統計特徵出發，分析研究了cdma通信中多用戶信號的數學模型，將盲源分離技術應用到多用戶信號檢測當中來，提出了兩種盲多用戶檢測的策略：基於獨立分量分析的下行鏈路延遲估計的多用戶檢測演算法；基於獨立分量分析后處理的匹配濾波多用戶檢測。 -
The performance detection and analysis of the tags are realized. the reader is integrated with the functions of microwave transmitter, receiver, data collector, digital signal processing ( dsp ), spectrum analyzer, field strength meter, and encoding
該閱讀器集微波發射機、接收機、數據採集、數字信號處理、頻譜分析、場強測試及解碼等功能於一體，實現了對電子標簽性能的檢測與量化分析。 -
3. making a deep research on weak sinusoid signal detection using duffing oscillators and combining chaos critical state detection method with general detection methods, this dissertation realizes weak sinusoid signal detection below - 50db snr. furthermore, starting from the analysis of the intermittent chaotic motion occurring in the detecting process, an array of duffing oscillators are used to estimate the frequency of weak sinusoid signals accurately
（ 3 ）全面深入地研究了duffing振子用於微弱正弦信號檢測的機理，並把混沌臨界狀態檢測法和傳統檢測方法相結合，實現- 50db以下超低信噪比的微弱正弦信號檢測;建立了混沌振子陣列，實現低信噪比下正弦信號頻率的估計。 -
( 3 ) according to the example, elucidated the good usage of the body detection information analysis system based on the above - mentioned model. the analytical result have the good reference value in using the analytical result of the body detection information system to scout the healthy condition and early - warning disease signal of community
（ 3 ）通過實例論述了利用上述模型所開發的體檢信息分析系統具有較好的使用性;用該系統對體檢信息進行分析的結果，對于跟蹤群體健康狀況、預警疾病信號有著很好的參考價值。 -
After this, this paper present the simple threshold ca - cfar detector with little reference cell number, and analyse the relationship between the detection probability and noncoherent integration number, reference cells, then the relationship curve and an analysis is also given. finally, the thesis simulate the signal processor and cfar algorithm, discussed results are proved to be correct
文章最後將產生的目標及雜波數據送入信號處理機的模擬系統，對其進行信號處理及恆虛警檢測的模擬，給出了模擬結果，對模擬結果進行了詳盡的分析討論，驗證了本文信號處理及恆虛警演算法的正確性。 -
So far, there is not much research on the signal detection of da - mimo system, and the general frequency selective channel is not taken into consideration. in chapter 3 of this dissertation, the coherent signal detection algorithms for da - mimo system under both flat fading and frequency selective fading channels are derived. and the analysis of the factors which affect the performance of the detection algorithms is also illustrated through computer simulations
針對分佈mimo信號檢測目前研究較少，並且沒有考慮一般意義下的頻率選擇性通道的情況，本文在第三章分別推導了基於平坦衰落和頻率選擇性衰落通道環境的分佈mimo信號相干檢測演算法，並通過計算機模擬，對影響演算法檢測性能的因素進行了分析討論。 -
The technology of condition detection and failure diagnosis of machinery equipment develops along with technologies of related fields such as modern testing technology, signal analysis and processing, computer technology and theory of failure diagnosis
機械設備的狀態監測與故障診斷技術是隨著現代化測試技術、信號分析與處理技術、計算機技術和故障診斷理論等相關技術而發展起來的技術，進些年來發展較快。
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