sr model 中文意思是什麼
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Reynolds numbers ( based on average velocity at passage inlet and hydraulic diameter of the passage ) are changing from 20000 to 80000 and the extraction ratios ( suction ratios, sr ) are changing from 0. 30 to 0. 60 for each test model. so the influences of reynolds numbers, suction ratios and etc. on the discharge coefficients and pressure loss characterist ics are also presented. flow fields of typical passages are visualized with the flow visualization techniques and measured with hot - wire anemometer
對每一種通道結構，實驗在不同通道進口雷諾數（ re = 20000 、 40000 、 60000 、 80000 ）和不同通道總出流比（ sr = 0 . 30 、 0 . 45 、 0 . 60 ）下進行，以研究這兩個流動參數及其它相應變化的參數（氣膜孔的雷諾數re _ h 、氣膜孔與通道的動量比i等）對出流特性和流阻特性的影響規律。 -
It is found that the existence of a maximum in the snr is the identifying characteristic of the sr phenomenon. " the main - unexpected - - novelty is the dependence of the effect on initial condition. " ( report of the phys. rev. e referee ) the coherence resonance ( cr ) and the stochastic resonance ( sr ) phenomenon in a globally coupled fitzhugh - nagumo neurons model are studied
Ohyreve審稿人語）在對fhn神經模型的共振現象研究中，我們考慮一個存在耦合的多個神經細胞相互作用的神經網路，利用平均場理論和概率躍遷理論，得到了神經系統在無信號和有周期性信號的兩種倩況下的靜息電位。 -
The dissertation is organized as follow : first, the characteristics of srm and its control system ' s development are introduced. previously major methods used to implement non - position sensor detection and the significance of making search for this direction is generated. and the configuration and fundamental operating principle of srm are analyzed ; some study of linear model and nonlinear model with phase coil as fundamental parameter are presented and sr ' s linear model and nonlinear model are set up
本文就以上兩個問題進行了深入研究，首先介紹了sr電機及其控制系統的發展歷程，研究無位置傳感器srd的意義和總結已有的無位置傳感器檢測方法，並且通過分析sr電機的結構和運行原理，研究sr電機繞組的線性電感模型和非線性電感模型，建立了電機的線性和非線性數學模型，重點研究sr電機的非線性模型，為sr電機運行與控制特性的研究和模擬研究奠定了理論基礎。 -
For parameter a, there is a close relationship exist between a ( 9, sr ) in two different radar incident angle that can be expressed as : with considering the effects of soil texture, we get the final expression of the inversion model : where mv ( t1 ), mv ( t2 ) is volumetric soil moisture content in two different temp, c, d is soil type related parameters, and v ( t1 ), s ( t2 ) is coresponding bare soil radar backscattering coefficients. inversion results show that for the c band hh polarized radarsat scansar data with a range of incidence angle from 20 to 40, the soil moisture change value can be derived with an acceptable accuracy using the above model. the temporal and spatial soil moisture change patterns are associated with rainfall and vegetation cover, as well as the soil hydraulic characteristics
利用最新發展的電磁波散射模型研究了不同植被覆蓋地表雷達波對地表土壤水分的敏感性，建立了半經驗植被雷達後向散射模型; 2 ） .研究發現在農作物等矮小植被覆蓋地表，植被層直接後向散射與植被類型相關，且在植被生長期，雷達後向散射系數對植被含水量的敏感性要高於對植被高度變化的敏感性; 3 ） .解決了單參數雷達地表土壤水分反演問題中，雷達入射角和地表粗糙度的影響這一難點問題; 4 ） .利用土壤介電模型校正了不同土壤類型對反演地表土壤體積含水量的影響; 5 ） .在以上成果基礎上，建立了完整的單參數雷達地表土壤水分變化探測反演演算法，經地表驗證，模型反演地表土壤水分變化值的精度為rmse = 0 -
Based on quasi - linear model of sr motor, the influences of angle on phase current, output power, energy loss are analyzed. an optimum result of angle is produced in accordance to given target
基於sr電機的準線性模型，本文分析了開通角和關斷角與相電流、輸出功率以及損耗之間的關系，並根據給定的優化目標，給出了該電機開通角和關斷角的優化結果。 -
The text calculated the price elasticity of demand of nr ( natural rubber ) and the cross elasticity of demand of nh and sr by establishing the model of nr ' s demand function
摘要通過建立天然橡膠需求函數模型，估算了天然橡膠的需求彈性系數和天然橡膠與合成橡膠的替代彈性系數。 -
The contents of this paper include the following several aspects : ( 1 ) a model of the fractures leakage is built through counting and analyzing the wealthy geological records of hae field, and a model of the fracture water transporting is also built according to the fracture water condition of its recharge and its runoff and its discharge in hae field ; ( 2 ) this paper studies the chemical behavior and the migration parameters of the elenent sr2 + in ground water in hae field, the main contents include : the presence form of the element sr in ground water is analyzed by way of the rmodynamics ; the absorption mechanism that granite and sand stone absorbs sr element is analyzed based on theory and experiment test the diffusion parameters of the element sr in water and in granite and in sand stone are researched with laboratory experiment test ; the partition coefficient of sand stone and granite to sr is tested by the batch way
其研究內容包括以下幾個方面： （ 1 ）通過對我國hae預選處置場豐富地質資料的大量統計和分析，建立了該處置場的基巖裂隙滲透模型。再根據hae預選處置場基巖裂隙水的補給、徑流、排泄條件及水位動態特徵，建立了預選處置場基巖裂隙水水運動模型。 （ 2 ）對高毒性鍶元素在我國hae預選處置場地下水中的化學行為和遷移參數進行系統的研究，其中主要包括運用熱力學方法分析了鍶元素在地下水中的存在形態，利用理論分析與實驗測試相結合的方法分析了花崗巖和砂巖對核素鍶的吸附機制，採用室內實驗裝置研究了核素鍶在地下水中的擴散參數以及在花崗巖和砂巖中的本徵擴散參數，採用靜態批式法研究了鍶在砂巖和花崗巖中的分配系數。 -
Secondly, basing on single channel if sr receiver mathematic model, this thesis has designed if sr receiver subsystem and brought forward its design project and system circuit principle diagram, and explained the system working principle. furthermore, this thesis introduces the working principles and respective applications of wideband high - speed adc ad6640, ddc ad6620 and high - speed dsp tms320c6713 according with the if sr receiver subsystem high - speed analog digital conversion department, digital down conversion department and high speed digital signal processing department. thirdly, the thesis emphatically demonstrates the software realization department of the if sr receiver subsystem, which including ad6620 ' s inner parameter software setup, tms320c6713 data transmission and processing and the quadrant demodulation algorithm program realization
其次，基於單通道中頻軟體無線電接收機數學模型，本文設計了中頻（ if ， intermediatefrequency ）軟體無線電接收機子系統，給出了中頻軟體無線電接收機子系統的設計方案和系統電路原理圖，說明了系統工作原理，並分別對應系統中的高速模數轉換部分、數字下變頻部分、基帶數字碩士學位論文軟體無線電理論研究及中頻軟體無線電接收機子系統設計信號處理部分，介紹了高速adcad664o ，數字下變頻器（ ddc ， digitaldownconverter ） ad6620 ，高速數字信號處理器（ dsp ， digitalsignalproeessor ） tms320c6713的工作原理，以及它們在中頻軟體無線電接收機子系統中的應用。 -
In order to improve the performance of ekf and ukf, the square soot unscented kalman filter ( sr - ukf ) with multiplicative noise is firstly investigated. considering the satellite nonlinear model, the sr - ukf attitude estimator is derived for gyroless satellite attitude estimation to render the state covariance with positive semi - definiteness and exceptional estimation accuracy
對于姿態估計，採用了rao - blackwellization技術將衛星模型狀態向量中的線性狀態部分（陀螺偏差）和非線性狀態部分（衛星姿態）分開處理，線性部分狀態可以由卡爾曼濾波（ kf ）估計得到，非線性部 -
Different modals of sr motor are completely calculated and analyzed by using ansys in this paper. this paper also presents a detailed research on the stator mode shapes and natural frequencies of srm by use of 3d finite element technique, based on its real structural model for the first time. when the reseach conclusions is compared with the former results, a conclusion will be drawn, that is the rationality and approach to reality of the modeling are essential to the fe analysis of motor properties
應用有限元軟體ansys對電機進行了不同建模方法的模態分析與計算，並首次基於真實sr電機定子模型，用3d有限元方法研究了定子模態和固有頻率，從取得的一系列研究結論，與以前的研究成果進行對比，可以得出結論：模型建立的合理性和逼近真實性對于電機各類性能的有限元分析至關重要，要得到盡量準確的結果，必須建立盡量逼近實際的模型。 -
( 2 ) this paper test the migration parameters of the element sr systematically by theory and the experiment set designed by self, it provide the on quantification parameters that the migration model of the element sr in the fracture water in hae field
（ 2 ）採用理論分析和自己設計的室內實驗裝置，較系統地研究了核素鋸在水中的遷移參數。為核素鋸在地下水中的溶質遷移模型建立以及遷移模型的預測提供了所需的定量化參數。 -
Based on the h - h model, the thesis studies the reciprocity of random noise and signal in neuron, and the rule of the phenomenon of sr resulting from their coordinating effect. it is concluded that by the addition of certain level of noise, the response of the nonlinear system to a weak signal is enlarged. that is to say, noise strengthens the response of nonlinear system to signal
在系統模型的基礎上，研究了隨機噪聲與信號在神經元中的相互作用，以及它們之間因協同效應而出現的隨機共振現象的變化規律，得出結論，通過加入一定的噪聲，弱信號通過非線性系統后輸出放大，噪聲增強了非線性系統的信號輸出。
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