衰減模數 的英文怎麼說
中文拼音 [shuāijiǎnmóshǔ]
衰減模數
英文
modulus of attenuation-
In this article, considering the character of the one - dimensioned continuum and the cross - section, the varied quotiety of the strain can be presented as the mode function to identify the damage. and inversion of the elastic wave is presented to detect the injures when the area is the variable of the inversion, for the pip usually buried under the earth or enwrapped into the protection make the detection difficulty by the mode of vibrancy. the influence of the area must be considered if the exactness is the pre - requisition
在論文中，考慮到壓力管道的一維性質，提出用應變模態改變變化率的方法對一維的結構進行損傷識別；同時考慮到在實際的工程和現場測試中，壓力管道大多深埋在地下或者有外在的保護膜，不宜進行模態的檢測，所以也考慮利用彈性波的方法對壓力管道的性質參數和截面性質進行反演識別，從而得到我們感興趣的東西，達到損傷識別；一般，在利用彈性波反射方法進行損傷檢測中，不考慮截面效應對彈性波的衰減影響，這就對損傷檢測造成一定的影響，本文考慮截面效應的影響，通過實驗來確定截面效應系數。Compared with straight ray tracing, inversion of bending ray tracing is better when data of test are accurate. on the other hand, natural weight is introduced and numerical simulations and experiments of wlm on inversion of velocity and attenuation are also made, which show that wlm, with resistance of noises and convergence of iteration, may get good re - construction images
本文引入了物理意義明確的自然權，對基於自然權的加權阻尼最小二乘反演演算法（ wlm ）在速度反演、衰減反演中進行了數值模擬和試驗研究，結果表明wlm均能獲得良好的重建圖像，迭代收斂，抗噪能力強。Based on the analysis of the effect on the maximum range of the equation ' s each parameter and the traditional method of extinction ratio, the noncooperative regulable attenuation - measure the minimum detectable power of laser altimeter on the condition of constant miss probability by attenuating the laser power transmitting to the diffuse reflected simulant target - was put forward
在傳統的消光系數法基礎上，根據對月測距方程各系數的影響權重分析，提出了非合作目標可調衰減法，即：通過對漫反射模擬目標，衰減出射激光功率，在一定的漏警概率條件下測量激光高度計的最小可探測功率。A new method for measuring the vibration of shadow mask without touch by detecting the light density with reflection type optical fiber sensor is presented. the measurement system based on the new method is designed to make the vibration measurement easier working, faster calculating, and get more precise results. it is an important measurement and analysis tool to improve the performance of shadow mask and display quality of cpt
本文提出了基於單光纖光強度反射法的非接觸式微振動測量系統的原理，並設計製造了該測試系統，探索出了簡單方便可靠的測量方法，能夠準確客觀地反映蔭罩振動的各項參數（各振動模的振動頻率、振幅、衰減時間） ，實現了測試裝置的簡便化和測試過程的自動化，為cpt張緊式蔭罩系統的性能改進與顯示質量的提高提供了有效的測試分析手段。The key technique include nip signal ' s generation, serial port 422 communication, control system data acquisition and processing, stationary wave ratio of antenna, sending and receiving signal ' s attenuation of antenna and so on
其關鍵技術包括nip信號產生， rs - 422串口通信，控制系統各模塊數據採集和處理，機載天線駐波比及收發信號衰減測量等。Optical power meter real - time monitor optical power of each optical cable, and control computer gather the value of optical power attenuation circularly, if some values excess the limit, the computer control optical switch to connect another spare optical fiber with otdr card, control the otdr card to test the optical fiber, and then find the malfunction point accurately. the system require software system to run with hardware devices tother. this paper analyze requirement and technical feasibility in software system, ooa and uml are used to analyze software and abstract the class diagram
通過光功率計對每條光纜中的備用光纖進行實時的監控，測試光功率的衰減值，主控計算機不斷循環的對每個光功率模塊進行數據採集，並記錄每路光信號的光功率衰減值，然後進行分析處理，如發現達到設定的光功率衰減門限值就報警，並控制光開關的切換，將故障光纜中的另一備用光纖與otdr卡連接，通過otdr卡對該光纖進行測試，從而確定故障點。Its main contributions include the following several aspects : firstly, the dissertation constructs the mathematic model of short baseline orientation determination using two geostationary satellites and analyses the applicable conditions of carrier phase interferometry. orientation determination precision is analysed in depth through both the conventional linearized method and monte - carlo computer simulation method, and the mathematical simulation results show that the linearized method has the shortcoming of fairly low elevation error analysis precision in high latitude area so as not to be very appropriate there. by analyzing the definite factors influencing orientation precision, the dissertation develops the concept of orientation dilution of precision, which uncovers the internal cause of exotic error behavior of bi - satellite orientation, and has important guiding significance for practical engineering applications
本文系統地研究了基於「北斗一號」衛星載波相位干涉測量原理實現地球靜止雙星定向的相關技術，主要研究成果包括以下幾方面:首先，建立了利用兩顆地球靜止軌道衛星進行短基線定向的數學模型，分析了載波相位干涉測量的適用條件;採用傳統的線性化解析法及蒙特卡洛隨機模擬法兩種途徑對雙星定向的精度進行了詳細分析，數學模擬結果表明在高緯度地區線性化解析法由於俯仰角誤差分析精度略有下降而不太適合;在分析定向精度確定性影響因素的基礎上，提出了雙星定向精度衰減因子odop的概念，揭示了雙星定向誤差特殊表現的內部機理，對實際工程應用具有重要的指導意義。In numerical simulation, the elastic zone is only considered and the effect of blasting waves on the rock medium, after attenuating through crushing zone and ruptured zone, becomes an input load
數值模擬僅考慮彈性區域，爆炸波對巖石介質的作用經粉碎區、破裂區衰減后成為輸入荷載。We present a charge - transport model of the photorefractive effect with two deep traps ( two deep - trap model ) based on one deep - trap model and shallow - deep - trap model. we also found dark decay behaviors which accord with the two deep - trap model in the two - beam interference experiments. the fast decay - time constant of the space - charge field is obtained as 714s
此外，在ce ： batio _ 3雙光束干涉光折變光柵的暗衰減實驗中，也觀察到了符合雙deep模型的衰減現象，得到光折變空間電場快衰減時間常數714s ，約12分鐘。The mathematic models of sampling and reconstruction are analysed respectively, and an important conclusion is got, that oversampling can decrease high frequence distortion of d / a output signal and the difficulty of designing lowpass filter. as a result the signal quality is improved
分析了采樣和重構的數學模型，得出了一個重要結論:過采樣可以減少d / a輸出信號的高頻端衰減失真，可以降低低通濾波器的設計難度，從而提高波形質量。Using the dsd models and forward scattering amplitude computed by the least squares fitting method, the specific attenuations at l - 400ghz have been computed and analyzed, the parameters of " power law " relation between specific attenuation and rainfall rate are obtained. the specific attenuations in qingdao, guangzhou and xinxiang are compared with itu - r specific rain attenuation models
利用平均雨滴尺寸分佈和點匹配法計算的雨滴的前向散射數據計算和分析了青島、廣州和新鄉地區1 ? 400ghz特徵雨衰減特性，得到了特徵雨衰減與降雨率的指數關系參數，並與itu - r （ internationaltelecommunicationunion - radiocommunication ）特徵雨衰減模式進行了系統的比較研究。The analytic specific attenuation model for rain for use in prediction methods are developed, the specific rain attenuations calculated by the analytic model are in high agreement with those by the parameters tabulated in itu - r model, this model has presented to itu - r as a proposed revision to current itu - r model
基於itu - r特徵雨衰減模式的列表參數，提出了特徵雨衰減的解析模式，該模式計算的特徵雨衰減與itu - r模式列表參數計算結果間有很好的一致性，並提交itu - r作為國際標準審議。At last distribution functions of load modes in life service are presented. based on the resisting force model and load model, the limit state equations of rc bridge are formulated. according to the resisting force is time - dependent and vehicle load is the non - gaussian distribution, jc method is applied to calculate the time - dependent reliability index of rc bridge
在抗力衰減模型及橋梁荷載模型的基礎上，將可靠度理論引入橋梁結構的評定中，推導出了橋梁結構耐久性極限狀態方程，並根據耐久性極限狀態方程中抗力是時間的函數，以及車輛荷載為非正態分佈的特點，應用當量正態法（ jc法）編制相應的程序計算橋梁構件的時變可靠度指標。Primarily there are two aspects : 1 ) the calculation model of the value of land classifying units - - model of time distance attenuation. in the calculation model of the value of land classifying units, author brings forward the model of time distance attenuation. in this model adopting the network analysis, and by establishing the road network, and proceeding path analysis, computing the time distance, then proceed the exponential attenuation or straight line attenuation on time distance, get the value of influence factor of the land classification unit
主要有兩個方面： 1 、定級單元分值計算模型? ?時間距離衰減模型在定級單元分值的求取模塊中，提出了時間距離衰減模型，模型中採用網路分析的方法，通過建立道路網路，進行路徑分析，求取時間距離，進而按時間距離進行指數衰減或直線衰減，得到定級單元因素因子影響分值。Finally, the problem of exponential filters for nonlinear time - delayed systems is considered. the filters designed by using the given approach can guarantee the stead - state and transient performance. by choosing suitable attenuation index, the perfect performances of filters can be attained
四、研究了一類不確定非線性時滯系統的指數濾波器設計問題，提出了一種設計指數濾波器的方法，使用該方法設計的濾波器可以同時保證濾波器的穩態性能和暫態性能，通過選取濾波器的衰減指數，可以使得濾波器具有良好的衰減性能，模擬結果很好地驗證了所給出的方法。All records are classified into three site conditions. for the two components of a record, two energy equivalent spectra are calculated, and the geometric mean of the two spectra are adopted to analysis by two - stage regression method using an attenuation model. then the attenuation law is attained
對每一條記錄，取了兩個分量所計算的能量譜的幾何平均值，選擇了衰減模型，利用兩步回歸法，對這些能量等效速度譜做了統計擬合分析，得出了地震動四種能量反應譜隨震級、距離等參數的衰減規律。Especially, the algorithm obtains the phantom ' s mass attenuation coefficient and spectrum of the ct system at the same time
特別地，該演算法在給出系統的x射線能譜估計的同時，還給出了構成模體的物質關于不同能量的光子的質量衰減系數的估計。Firstly, an estimation algorithm for spectrum of the ct system is presented in the paper by using a standard cylinder or wedge phantom, where the mass attenuation coefficient of the contained material of the phantom is not necessarily to be known
本文首先給出了由標準均勻圓柱狀模體或楔狀模體估計ct系統的x射線能譜的演算法，該演算法不必已知構成模體的物質關于不同能量的光子的質量衰減系數。Then, according to waveguide theory, planar waveguide is analyzed. the main parameters, such as spread constant, decay coefficient, cut - off wavelength and so on, are deduced from dispersion formula of planar waveguide. the distributions of electromagnetic wave in the planar waveguide are obtained also
其次根據波導理論分析了平面波導，由平面波導的色散方程推導出了導模的傳播常數、衰減系數、截止波長等特徵參數以及波導中光波電磁場的分佈。According to the test results from 18mm - thick - steel plate adhering to concrete, gas and oil, the obvious differences in the attenuation coefficient and number of bottom waves are found. the test results shows that it is feasible to adopt ultrasonic longitudinal wave reflection method to test the bonding quality of the steel and
採用超聲縱波反射法單面檢測鋼-混凝土的粘結質量是可行的，採用底波衰減系數和底面反射波的個數作為判定鋼-混凝土的粘結質量依據是有效的，所採用的理論分析模型是正確的。分享友人