阻滯系數 的英文怎麼說
中文拼音 [zǔzhìxìshǔ]
阻滯系數
英文
coefficient of retardation-
Since lots of factors such as pumping blood ability of heart, heart rate, vascular resistance, flexibility of main artery and big artery, body blood capability and hemal physical state can be reflected by blood pressure, it is of great importance to be one physiological parameter for body cycle system enginery
=血壓是反映心臟泵血功能、心率、血管阻力、主動脈和大動脈的彈性、全身血容量及血液粘滯性等生理參數的重要指標,是反映人體體循環系統機能的重要生理參數。Based on extensive investigation of construction technique history of chinese ancient buildings, the structure method, structure developing history and seismic behavior of chinese ancient timber structure buildings are analyzed in several respects of the structural system and form. through a series of experiments on constituent parts of chinese ancient timber building structure, including the tests on the corbels and brackets called dougong subjected to low cyclic reversed loadings, the tests on the wooden frame using the tenon - mortise joints as connections of column and beam subjected to low cyclic reversed loadings, the tests on vibration isolation effect of friction and slippage between column footing and their socle base, and a series of shaking table tests on a chinese ancient timber structure palace building mode under artificial earthquake at serving conditions, destroyed conditions and reinforced conditions, many valuable results of structures such as moment - curvature hysteretic loops of dougong structure and tenon - mortise joints under low cyckc reversed loadings, the static function, the seismic performance, energy dissipation, vibration reduction, energy - loss mechanism, nechanicalmode and failure mode were studied. aplenty of valuable parameters of the structure system were obtained, such as the natural period of structure, vibration modes, damping ratio, factor of vibration isolation, oscillate amplitude of ineitial accebration, velocity and displacement, magnitude of slippage, and the mechanism of structure failure and collapse etc. based on these research, the complete analysis of ancient timber structure under earthquake were carried out in which including mechanism analysis method, calculating mode, strength analysis of members and joints, strengthening methods for serving damaged ancient timber structure buildings were also taken into account
依照宋代《營造法式》建造了抬梁式殿堂木結構構件及結構模型,對中國古代木結構中的典型構造如:柱腳在礎石頂面平擱簡支、柱架榫卯連接、柱高不越間之廣、側腳、生起、斗拱等的構造機理及結構功能進行了量化分析和實驗研究: (一)通過木柱石礎靜摩擦試驗,測定了柱腳與石礎古鏡面間的摩擦系數及摩擦力隨上部結構荷載變化的規律; (二)通過單柱承載力試驗,測定了古建築中木柱的受力變形特徵、破壞模式、及模型材料的變形模量、極限承載力、極限變形等參量; (三)通過柱架低周反復荷載試驗,測定了柱架的抗側移剛度、柱架恢復力特性及滯回曲線、榫卯張角剛度及其變化規律、柱架及榫卯的極限承載力和極限變形、及榫卯減振參數; (四)通過斗?低周反復荷載試驗和受壓試驗,測定了古建築木構件與木構件間摩擦系數,斗?抗側移剛度,斗?恢復力特性及滯回曲線,斗?抗壓極限承載力及受力變形規律; (五)通過抬梁式殿堂間架模型振動臺試驗,測定了殿堂木構架結構自振周期,地震反應振形、阻尼特性及阻尼比;按結構分層特點對柱腳、柱頭和斗?層上的屋蓋的地震反應採用多點同步測量,對柱根滑移、榫卯變形、斗?的變形、復位、耗能減振參數等進行了定量分析。In the models, the iron core nonlinearly of the traction transformer and the magnetic hysteresis effect without the b - h curve are considered. having tested by digital simulation, the winding parameter has not changed in the state of external fault or magnetizing inrush etc. but the winding parameter has obviously changed in state of inter fault or inter - turn fault. ( 3 ) the rules three phases converted to two phases of traction transformer in electric railways are developed in this paper
( 3 )利用牽引變壓器磁鏈平衡方程,建立了基於系統辨識理論的雙繞組單相接線牽引變壓器、阻抗匹配平衡牽引變壓器及scott (斯科特)接線牽引變壓器的「灰箱」模型,該模型考慮了牽引變壓器鐵芯非線性和磁滯效應,但又不直接反映在模型中,並且無需鐵芯的b - h曲線數據。1 m 0. 5, the phase - shifted angle 6 is controlled in term of sine law which makes the magnitude of resonant voltage track a reference sine voltage, and the resonant voltage is rectified, filtered, inverted and then the better sine - voltage output is obtained, theoretical analysis and experimental results show that for the resistive load and inductive load, the switches of leading leg of the phase - shift - controlled circuit are always turned on at zvs, and ones of lagging leg are turned on at zvs ( < 0 ) or turned off at zcs ( ( > 0 ), moreover, all switches in the low - frequency inverter are always turned on and off at zvs, the measured circuit efficiency for rated load reaches up to 88 %
從功率單向流動角度出發,提出了一種lcc諧振型恆頻移相單相高頻鏈逆變電路拓撲,在調制系數0 . 1 m 0 . 5情況下,控制移相角按正弦規律變化,使諧振電壓脈沖列的幅值追蹤參考正弦電壓信號,經過整流、濾波、低頻逆變,從而獲得正弦度較好的輸出電壓。理論分析和實驗結果證明對于阻性負載或阻感性負載,移相全橋具有超前橋臂零電壓開通,滯后橋臂或者零電壓開通( _ 0 )或者零電流關斷( _ 0 )的軟開關特性,而低頻逆變器的各個開關均實現零電壓條件下的開通與關斷。The time - history method in combination with damper coefficients and their associations was employed to compare and analyze the bridge response results in terms of the inertial forces of key sections and displacement of key positions
針對不同粘滯阻尼器阻尼系數以及阻尼指數組合,採用時程分析方法,比較分析了結構主要構件和部位的內力及位移地震響應結果。The simulation result shows that vadose zone can rigorously retard those nuclides with vigorous adsorbility, i. e. the bigger the nuclide decay coefficient is, the more the nuclide is retarded in vadose zone and the less the nuclide concentration in aquifer is, and that the distribution coefficient directive affects the form of the nuclide concentration curve in an aquifer
數值模擬結果表明:包氣帶對于吸附性較強的核素具有很大的阻滯作用,對于低分配系數的核素阻滯作用較弱;衰變系數對含水層中核素的遷移起到了重要作用,隨著衰變系數的增大,地下含水層中的核素體積濃度逐漸降低,並且分配系數的大小直接影響著核素在含水層中體積濃度分佈曲線的形狀。Abstract : according to the characterestic of resistance furnace temperature control, temperature rising one - way control, large time delay and time - variation of parameter, using method of fuzzy compositional rule of inference establish fuzzy model and design fuzzy cntroler. in order to increase control system precision, it gives a fuzzy variable k, and sets parameter self - adjusting fuzzy control system. this system can on line self - adjusting controller parameters according to the error and variations of the error. it makes the system steady precision improved
文摘:根據電阻爐溫控制的特點,即只有升溫單向控制、滯后較大且具有參數時變性,利用模糊推理合成法建立模糊模型並進行模糊控制器設計,為提高模糊控制的精度,引入模糊變量k ,構成參數自調整模糊控制系統.該系統可根據誤差和誤差變化在線自動調整控制器參數,使系統的穩態精度得到改善According to the characterestic of resistance furnace temperature control, temperature rising one - way control, large time delay and time - variation of parameter, using method of fuzzy compositional rule of inference establish fuzzy model and design fuzzy cntroler. in order to increase control system precision, it gives a fuzzy variable k, and sets parameter self - adjusting fuzzy control system. this system can on line self - adjusting controller parameters according to the error and variations of the error. it makes the system steady precision improved
根據電阻爐溫控制的特點,即只有升溫單向控制、滯后較大且具有參數時變性,利用模糊推理合成法建立模糊模型並進行模糊控制器設計,為提高模糊控制的精度,引入模糊變量k ,構成參數自調整模糊控制系統.該系統可根據誤差和誤差變化在線自動調整控制器參數,使系統的穩態精度得到改善This dissertation also presents the equivalent stiffness and damping models and the nonlinear hysteresis and saturation model of a kind of the mr damper developed by the experimental testing and modeling in order to describe accurately characteristics of the mr damper
建立了磁流變阻尼器的等效剛度和等效粘性阻尼系數與施加電壓、激振頻率和振幅的關系以及能精確表示磁流變阻尼器的力學特性的非線性滯回模型。It was found that self - assembly films of napss / pdda showed low impedance, good linearity and high sensitivity. impedance of sensors with 25 bilayers of napss / pdda composite film changed linearly for four orders of magnitude ( 10 - 10 q ) over the range of 20 % rh ~ 95 % rh. furthermore it was found that organic / inorganic nanocomposite films exhibit faster response than organic / organic composites
發現: napssrpdda體系具有阻抗低、響應線性度好、濕滯小、響應快、靈敏度高等優點,其中雙層數為25的濕敏元件在20 rh95 rh濕度范圍內具有良好的線性響應,阻抗變化近4個數量級』 l 』 q卜靈敏度高。On the other hand, relationship between doping concentration, phase transition temperature, magnitude of resistance change and hysteresis width was investigated
在此基礎上,本文進一步探討了摻雜濃度與vo _ 2薄膜相變溫度、電阻突變數量級以及熱滯寬度的關系。Considering the nonlinear characteristic of dampers, computing simulation and analysis of the seismic response for high efficient damper suitable for muti - structure system ( hedms ) and system parameters " influence on control effect have been done
考慮阻尼器的非線性滯回特性,對兩結構高效被動阻尼控制體系( hedms )的地震反應及體系參數對控制效果的影響進行了模擬分析。Significance of some measures to improve the application of computer simulation technology in structural seismic analysis, including establishing or upgrading the hysteresis model and multiparameter failure criteria of structural members, studying the damping mechanism of structures during decomposing, discussing the application of database technology in simulation system, developing analysis models for innovating structures and algorithms for analysis of earthquake responses of structures with initial damage, and introducing parallel technology is pointed out
指出建立或完善構件層次的滯回本構模型和多參數破壞準則,研究結構解體前後的阻尼機制,探討數據庫技術在模擬系統中的應用,發展新型結構體系的分析模型以及具有初始損傷結構的地震反應分析方法,引入并行計算技術等對推動計算機模擬技術在結構抗震分析中的應用具有重要的意義。In order to find out the speciality of the hysteretic system under random excitation, random responses and model parameters of hysteretic system were studied by the method of stochastic equivalent linearization and mento - carlo simulation
為了更好地了解在隨機激勵作用下遲滯阻尼振動系統的動力學特性,本文將隨機等價線性化法與monto - carlo法應用於遲滯阻尼振動系統隨機響應分析並對該系統的參數特性進行了初步的研究。The control object that characterize the phase lag resemble resistance furnace adopt intelligent pid control. the control parameter is self - tuning, not artificially tune off line. furthermore, it heightens the automatization degree of system and the control precision
針對電阻爐這樣的具有滯后特性的控制對象採用了智能pid控制器, pid的控制器的參數由系統自整定,而不是離線後由人工整定,提高了系統的自動化程度,而且控制精度也有很大的提高。In order to study the main effected factors of the aseismic performance of concrete dampers, experiment of dampers in forms of concrete ductile columns was conducted subjected to low cyclic loading, the damage pattern, hysteresis behavior, ductility factor and equivalent viscous damper factor of the dampers were obtained
摘要為考察混凝土延性柱耗能器抗震性能的主要影響因素,通過對多根延性柱耗能器的低周反復荷載試驗,得到其破壞形態、滯回特性、延性系數、等效黏滯阻尼系數等參數。Details behavior as bellows : ( 1 ) the damping force of the damper with concrete ductility column is higher, and the final damping force smoothly decreases. ( 2 ) the ductility ratio of the damper with concrete ductility column is larger, so it has good ductility and its most level displacement is 1 / 14 ~ 1 / 8 of the column height. ( 3 ) the hysteretic curve of the damper with concrete ductility column is plumper
具體性能如下: ( 1 )混凝土延性柱耗能器的阻尼力比較高,後期阻尼力下降比較平緩; ( 2 )混凝土延性柱耗能器的位移延性系數較大,具有較好的延性,最大水平位移達到柱高的1 / 14 1 / 8 ; ( 3 )混凝土延性柱耗能器的滯回曲線飽滿; ( 4 )混凝土延性柱耗能器中延性柱屈服后等效粘滯阻尼系數迅速增大,消耗地震能量的能力增大; ( 5 )混凝土延性柱耗能器中每根延性柱的破壞形態基本一致,表現了良好的共同工作性能。分享友人