seismic signal 中文意思是什麼
seismic signal
解釋
地震信號-
Owing to complicated earth ' s surface condition such as the steep stratum outcropping of front - zone of mountain or the huge thick gravel stratum ' s overlay and earth ' s surface large undulation, complicated underground geology structure developed extremely such as thrust and overthrust nappe, and violent change of the lateral velocity, etc. in front - zone of mountain there are a series of problems such as serious secondary disturbance and low signal - to - noise ratio in seismic exploration gathering
由於山前帶高陡巖層出露或巨厚礫石層的覆蓋、地表起伏大等復雜的地表條件、逆沖和逆掩推覆等復雜地下地質構造發育、速度橫向變化劇烈等原因，造成了山前帶地震勘探資料採集存在次生干擾嚴重和信噪比低等一系列問題。 -
But researchers from the university of california, berkeley, say the measurements of seismic waves soon after a temblor can signal whether it will be a minor or monster temblor
但是，美國加利福尼亞大學的研究人員說，在地震剛剛發生之後產生的震波大小便可顯示出這次地震最終是小還是大。 -
With practical engineering examples, this paper deals with the collection of surface wave signal along with seismic refraction exploration, the utilization of surface wave components to make analysis during data processing, the thickness division of overburden bed, strongly - weathered bed, intermediately - weathered bed and weakly - weathered bed in combination with the refraction data, and mutual reflection and interpretation of the burial condition of the bedrock surface
筆者結合工程實例，介紹了在地震折射勘探中同時採集面波信號，在資料處理時利用面波組份進行分析，配合折射資料對測區覆蓋層、強風化層、中風化層及弱風化層厚度進行劃分，同時相互映證解釋基巖面的埋藏情況。 -
Actual seismic data procession shows the efficiency of this method to increase the signal - to - noise ratio of horizontal stacked profile, especially for inaverage signal - to - noise ratio in pre - stack trace assemblage data
實際地震資料處理表明，這種方法能夠有效地提高水平疊加剖面的信噪比，尤其對于疊前的共中心點道集資料中信噪比不均衡的情況，效果更好。 -
Gps is a planet wireless conductance system which is global and all - weather, gps can offer high precision time orientation information to infinite user, clock precision reachs 10 ? 6 magnitude 。 not only changes traditional time method of quartz crystal clock, but also replaces wireless shortwave and even more lowfrequency signal and tv signal whose overlay range is limited and low precision, offers advantage to geology field task, achieve automatization and high precision of seismic flow observation
利用gps授時信號全方位、全天候、連續性、實時性和高精度的特點，以gps信號為基準來校準本地時鐘（晶體振蕩時鐘或原子鐘） ，將gps接收機輸出信號的長期穩定度和恆溫晶振的短期穩定度相結合，應用大規模可編程邏輯器件，設計和實現了由pc104控制的實時在線授時系統。 -
The principle of vibrator is to introduce scattered energy to underground in a comparatively long time, and collect the energy through correlation and compress it into a narrow pulse. the portable high - frequency vibrator system, developed by key lab of geo - exploration and instrumentation ( jilin univ ), ministry of education, generates chirp signal and accumulates energy through a long - time bestiring. according to the characteristics of vibrator, the seismic recorder that operates on - line with vibrator must have these functions as follow : first, it must have the ability of recording a great quantity of data. second, it must have assistant channels to sample reference signal. third, it must have the function of data correlation in real - time
可控震源利用可控的小能量、長時間激發波來實現沖擊震源瞬時產生的大能量激發波。在利用可控震源進行地震勘探時，要求地震儀長時間記錄地震信號，這對地震儀的采樣長度提出了很高的要求。受存儲量和數據傳輸速度的限制，絕大多數地震儀很難對如此大的數據量進行記錄，同時，可控震源要求地震儀有兩個輔助通道並且具有數據相關功能，目前國內還沒有出現滿足要求的地震儀產品。 -
It is that energy conversion that is responsible for the violent impact against the earth that generates the seismic signal.
就是這種能量轉換引起對地層的猛烈沖擊，從而產生了地震信號。 -
Simultatly, based on the vaviaction of seismic signal - noise ratio, the anthor use the funtion singular method in the seismic data procesy and put forward the wavelet amplitude singular exponentid method and the wavelet power spectrum singular exponential for the fractued density detection
與此同時，將函數奇異性分析的思想引到地震信號處理中來，針對地震信號信噪比的高低，提出小波振幅奇異性指數法和小波功率譜奇異性指數法的裂縫密度檢測方法。 -
The status quo of high - resolution data acquisition system is discussed and by studying the character of high - resolution seismic exploration and seismic signal, the theoretical models and character of each unit are gained. this paper point out that under 1000 meter ' s depth where petroleum is embedded the idr of central controlled seismic instrument and telemetricseismic instrument are lower than 70db which ca n ' t meet the needs of high - resolution seismic exploration
文章論述了當代高解析度地震數據採集系統的現狀，對高解析度地震勘探及地震信號特點進行了研究，得出了高解析度地震勘探數據採集系統的理論模型和各功能單元的理論特性，指出在石油與天然氣埋藏的千米以下的地層，集中式數字地震儀和24位遙測地震儀的瞬時動態范圍均不超過70db ，遠遠滿足不了高解析度地震勘探的需要。 -
Doing the further research on the division frequency stack on the foundation of study of predecessor, at first the residual moveout correction is done to the seismic record, make the phase axle regularity, doing foundation for the same phase stack ; then carried on division scale processing by wavelet transform ; spectrum whitening is done to each scale, the high and low frequency band need to do prolongs, the middle frequency bands only increase the value of the frequency spectrum ; several kinds of methods that estimate the value of signal - noise ratio has been studied further, and summarize their advantage and disadvantage as well as the scope of application ; the seismic record after spectrum whitening is stacked by weighting with the value of the signal - noise ratio ; then estimate the value of signal - noise ratio which is each scale section after stacking, the scale that the signal - noise ratio is big is assigned big weighting, otherwise, the scale that signal - noise ratio value is small is assigned small weight ing, and carried on weighted reconstruct to each scale section
本文在前人研究的基礎上，在分頻疊加方面做了進一步的研究。首先對地震記錄進行剩餘時差校正，校齊同相軸，為同相疊加做好基礎工作；然後對地震記錄用小波變換的方法進行分尺度處理；對各個尺度分別做譜白化，對于高、低頻段需要做頻帶延拓，中間頻段僅提升頻譜值；對于幾種信噪比定量估計的方法進行了深入的研究，並且總結了它們的優缺點以及適用范圍；對譜白化后的地震記錄用信噪比估計值作為加權系數進行加權疊加；對于各尺度的疊加剖面也進行信噪比估計，對于信噪比大的尺度給予大的加權系數，反之，信噪比值小的尺度給予小的加權系數，對各尺度疊加剖面進行加權重構。 -
We have imported some state - of - the - art equipments such as : high - frequency vibroseis and multi - level geophones for field data acquisition. by doing so, we have acquired high - quality seismic data with high sample rate, high signal to noise ratio and high frequency content
在採集上，引進國外高頻可控震源，多級檢波器等主要設備，得到高采樣率、高信噪比、高解析度的高品質資料。 -
The seismic signal from an underground explosion can be greatly reduced if the explosive is detonated inside a large cavity rather than being tightly packed into surrounding earth materials. the method is referred to " cavity decoupling ", which is very effective for concealing the underground nuclear explosion
相對于填實、封閉爆炸，地下大空腔中的爆炸可使遠區地震波幅度大大降低，因此空腔解耦技術是隱蔽地下核試驗的有效手段。 -
In order to reflect the characteristics of amplitude increase and frequency changing of seismic signal, a new automatic recognition method of seismic phase is developed based on the instantaneous amplitude and instantaneous frequency
摘要為了充分反映地震信號振幅增大和頻率改變的特徵，發展了一種以振幅和瞬時頻率比乘積為特徵參量的震相自動識別方法。 -
In order to improve snr of seismic signal for controlled vibroseis in seismic exploration, a set of phased array vibroseises is developed for generating directional seismic wave by controlling differences of phases between neighboring vibroseises, and a special seismic signal detection method for phased array vibroseises is proposed
摘要為提高可控震源地震信號的信噪比，將雷達系統的相控陣技術應用於可控震源地震，通過控制相鄰震源的相位差恆定，使地震波能量集中，產生定向地震波束，加強有用信號的強度，從而提高了地震信號的信噪比。 -
During interpolation, the original frequency of seismic signal is kept very well without negative effect to the subsequent processing. 5. cubic curves are used to geologic structure model input, and the formation boundary becomes smooth, which is good to the forward modeling. this method could hold true to various background
成功地將樣條曲線應用於地質模型輸入環節，保證了地質模型界面的光滑連續，並能夠廣泛適應于各種質量的模型底圖，為正演模擬取得良好的效果奠定了基礎。 -
Hilbert - huang transform spectrum and its application in seismic signal analysis
黃變換譜及其在地震信號分析中的應用 -
Application of fractal box - counting dimension to analysis of blasting seismic signal
基於分形盒維數的爆破震動信號研究 -
The phased array seismic signal detection result is given and compared with single and combination vibroseises under the same experience condition
在給定條件下，與單震源地震和組合震源地震相比，相控地震的信噪比最高。 -
The vertical delay stacked source obtains optimum matching with wall rock by controlling the charge mode and the excitation velocity, and maximum utilizes its energy. thus the seismic signal with the high frequency abundance and frequency bandwidth wide be obtained
垂直延遲迭加震源通過控制裝藥方式和控制炸藥速度來達到與圍巖的最佳匹配，最大限度的利用其激發的能量，激發出高頻成份豐富、頻帶寬、高頻能量高的地震信號。 -
Time - frequency analysis and parameter estimation of noisy polynomial phase signal ( pps ) are the general problems in such fields as radar, sonar, communication, biomedical application, seismic signal analysis and so on
噪聲背景中多項式相位信號的時頻分析和參數估計是雷達、聲納、通信、生物醫學、地震信號分析等領域需要解決的共性問題。
分享友人