The application of signal detection theory in ships ' lookout at sea 信號檢測論在船舶了望中的應(yīng)用
Analysis on code switching from the perspective of signal detection theory 從信號察覺理論的角度分析語碼轉(zhuǎn)換
Signal detection theory 信號檢測論
The application of chaos theory to weak signal detection is a creationary research , which extends the application field of chaos theory and impels the development of weak signal detection theory 將混沌理論應(yīng)用于微弱信號檢測是一個開創(chuàng)性的研究,它拓寬了混沌理論的應(yīng)用領(lǐng)域,將微弱信號檢測理論推進了一大步。
Combining the basic laws of psychophysics and signal detection theory , we use two - alternative forced - choice ( 2afc ) to study the threshold change of human electric sense under different noise levels 在心理物理實驗中,結(jié)合心理物理學(xué)和信號檢測論的基本原理,采用了二間隔的強迫選擇法( 2afc )作為實驗方法,研究不同噪聲量級情況下人體電感覺閾值的變化。
With the development of signal processing techniques and fast algorithms , the signal detection theory got much progress . generally speaking , robust detection methods can be divided into two major branches , classical methods which are based on robust hypothesis testing and modern methods based on new signal processing methods 同時信號處理方法和計算機以及快速計算技術(shù)的快速發(fā)展大大豐富了信號檢測的手段,可以在原來理想模型的基礎(chǔ)上進行魯棒化( robustification ) ,或者采用新的檢測方法。
Since the western countries began the srfcs research in the eighties , theory of signal detection is used in fdi , and it was successful in some fdi functions in several types of testing aircraft . china did the srfcs research recently , but lack of the engineering fdi algorithm . because the " model based signal detection algorithm " is sensitive to the matching accuracy of the mathematics model and aircraft has prominent nonlinear aerodynamic factors , it is difficulty to upgrade the ability of fdi based on the classical signal detection theory and data fusion only 國外自八十年代開展自修復(fù)研究,一般采用基于常規(guī)數(shù)據(jù)處理的故障檢測理論來實現(xiàn)飛控系統(tǒng)故障檢測與隔離功能,現(xiàn)已在幾種驗證機上取得初步成果,而國內(nèi)的研究尚缺乏實用的工程算法;同時,基于常規(guī)數(shù)據(jù)處理的故障檢測精度對被檢測對象的數(shù)學(xué)模型匹配度敏感,且飛機的氣動特性在故障情況下又具有較強的非線性特性,因此,單純依靠常規(guī)的信號處理算法難以進一步提高故障檢測的精度。
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布式光纖傳感器的原理和發(fā)展歷程的基礎(chǔ)上,通過分析被檢測的光纖布里淵后向散射信號的特點,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(shù)字信號平均(數(shù)字boxcar )的處理方案。