時變模型 的英文怎麼說
中文拼音 [shíbiànmóxíng]
時變模型
英文
time-varying model-
During the previous analysis of asphalt pavement structure with cracks, the stress intensity factors were usually calculated approximatively using plane strain model for some limitation. however, the assumptive load of this model is not coincident to the practical load
在以往分析含裂縫的瀝青路面結構時，由於條件的限制，通常是假設瀝青路面結構近似為一平面應變模型，但是這種模型所假設的荷載與實際作用的荷載有較大的區別。With linear time - invariant modeling of phase noise and definition of “ effective resistor ”, we analyze the critical parameters of the circuit and calculate the value of phase noise at the 1 / f ~ 2 region
引入「有效電阻」的概念對電路的各項關鍵參數在線性時不變模型下進行理論分析和推導，得到相位噪聲在1f2區域的理論值。Using vogel ' s wear index as the rail side wear index, the paper analyzes the side wear variations of rail head when the parameters in the wheel / rail system vary, analyzes the influences of track irregularity on rail uneven wear on gauge corner emphatically. this paper analyzes the rail side wear dates measured by track division of shan hai guan since 1990, then gains the relationship between side wear and traffic volume and sums up the characteristics and regularities in the formation and development of side wear. in the end, some measures for regarding the side wear on curves are put forward
從輪軌摩擦、輪軌接觸幾何關系、輪軌接觸應力和輪軌蠕滑等方面對鋼軌側面磨耗機理進行了探討，從軌道幾何參數、機車車輛運營條件等方面對鋼軌側面磨耗的影響因素進行了重點分析和總結；應用輪軌系統動力學，建立了輪軌空間耦合振動時變模型，採用vogel側磨指數作為鋼軌側磨指標，系統分析了輪軌參數變化的情況下，軌頭側面磨耗的變化規律，重點分析了軌道不平順對鋼軌不均勻側磨的影響；對山海關工務段1990年以後現場測得的曲線鋼軌側磨數據進行了分析，通過擬合得到了鋼軌側磨量與運量的關系曲線，並總結了曲線上股鋼軌側面磨耗的特徵和發生、發展規律；最後提出了一些減緩曲線鋼軌側面磨耗的措施。The study demonstrated that linear visco - elastic parameters of rheological models built by theoretical modeling methods were constant while nonlinear visco - elastic parameters were not constant and changed as stress level changed and that visco - plastic parameters determined the shape of stress - strain curve
研究表明：運用模型理論建立的流變模型的線性粘彈性參數在低應力水平下是惟一的，但非線性粘彈性參數不惟一，並隨應力水平的變化而變化，而粘塑性參數的大小決定了應力應變等時曲線的形狀。National key laboratory of advanced composites ( lac ) in beijing institute of aeronautics materials ( biam ) has developed a new medium temperature curing epoxy resin system, of which the glass transition temperature is 119. 88, for resin transfer molding ( rtm ). in order to investigate the relation between viscosity and time - temperature, the rheological behavior of the system was studied by dsc and viscosity experiments. a rheological model based on the dual - arrhenius equation was established and used to simulate the rheological behavior of the resin, which was in good agreement with experimental data
本文表徵了北京航空材料研究院先進復合材料國防科技重點實驗室樹脂組新開發出的rtm用中溫固化環氧樹脂體系3266 （玻璃化轉變溫度為119 . 88 ）其粘度隨時間、溫度的變化關系，在粘度實驗和dsc熱分析實驗的基礎上，對用於rtm工藝的該環氧樹脂體系的化學流變特性進行研究，並根據雙阿累尼烏斯方程建立樹脂體系的流變模型。Fourth, the theoretical model of optimum technological growth rate under discrete change is erected. technology is a unique production factor because technological growth experiences a mutation when technological increase accumulates to a certain extent. under this condition, the point - mutation model in tom ’ s mutation theory is applied to explain the phenomenon of technological
將技術作為不同於勞動和資本的特殊生產要素進行考察，即當技術量的積累達到一定程度時，技術增長會產生突變，在此條件下，運用湯姆突變理論中的尖點突變模型，解釋了技術突變現象，討論了勞動和資本的不同組合變化下，在臨界點附近技術突然躍升或下降的突變性質；構建了技術突變完成後的技術增長率優化理論模型。Abstract : this paper introduces bridge section model tests in the wind tunnel. it presents static forces on bridge section models. the effects of bridge fences, isolation belts and different model lengths on static forces are studied. the static and dynamic stabilities of bridge are analyzed. the results show the effect of bridge fence, isolation belts and different model lengths on static forces should be considered in wind load design
文摘:通過橋梁節段模型風洞試驗測量了橋梁的風力，研究了橋面護欄和隔離帶以及變模型長度對模型風力的影響，並分析了橋的馳振穩定性和顫振穩定性.試驗結果表明：設計試驗方案以及應用試驗結果時應考慮模型長度、橋面護欄及隔離帶的影響The main contributions are as following : the dynamic modeling, the solution of the linear and nonlinear differential equations, the dynamic response of the system, and so on. on account of the influence of the model of the high - speed cam - follower system on the dynamic character, the two modelings, the modeling with consideration of the clearance between the cam and the follower and the modeling without consideration of the clearance, were been addressed firstly
本課題主要對高速凸輪機構的周期時變系統的動力學問題進行了相關研究，具體在高速凸輪機構作為周期時變系統的動力學建模、凸輪系統的周期時變模型的線性和非線性的微分方程的求解方法探索和凸輪系統的動態特性分析等方面做了一些工作。On the basis of displacement - time series of the slope, a nonlinear dynamic model is set up according to backus generalized linear inversion theory in this paper. due to the equivalence beween autonomous gradient system and catastrophe model, a standard cusp catastrophe model can be obtained through variable substitution. the method is used in analysis of displacement data of huangci landslide and wolongsi landslide and in understanding how slopes evolve before sliding. the result shows that the nonlinear dynamic model can make satisfactory prediction result. is it most important that there is a sudden fall of d, which indicates the occurrence of catastrophe ( when d = 0 )
研究表明，滑坡變形失穩過程具有混沌和分維特性，可以用分形理論來研究滑坡預測問題，基於對任一連續函數，至少在較小的鄰域內可以用多項式任意逼近的數學理論，運用改進的backus廣義線性反演理論，以斜坡位移時間序列為基礎，反演了斜坡演化的非線性動力學模型。並利用自治梯度系統與突變模型的等價性，通過變量代換得到標準的尖點突變模型。With respect to the applications of pki in pervasive computing networks, we provide an elegant simplized model for trust to solve trust management problem efficiently. the idea to build up such a model originates from that of " web of trust " model of pgp mixed up with that of the delegation model of spki, more details as follows : 1. the simplized trust model and the corresponding trust metrics evaluation algorithms
我們把信任分為信任和相信兩種，通過研究傳遞閉包的原理，提出一個理論上被證明的具有循環不變性的信任度合併演算法，並且給出了在一個實際的模擬環境中該模型的應用效果對比，同時該模型結合了pgp和spki各自的優勢，彌補了pgp 、 spki各自的不足，表達的信任關系能夠真實反映普適計算的分散式特點和彼此相當的社會關系形式，其優勢非常突出適合推廣到多種普適應用環境。Identification of time - varying modal parameters of structure using output error time series model
利用輸出誤差時間序列模型識別結構時變模態參數Phase space reconstruction technique is used to reconstruct the phase plane. the approach to detect the abnormal point of the tune - dependent of the crack by phase space is developed. combined with gray system and catastrophe theory, according to observation data of dam cracks, a gray cusp catastrophe model is established to diagnose the abnormality of the crack
（ 5 ）利用相空間重構技術重構裂縫時效變形的相平面，提出了裂縫時效轉異點的相平面識別法；並且基於突變理論和灰色系統理論，建立了裂縫轉異診斷的灰色尖點突變模型；並將以上方法和模型用於工程實際，由此對所提方法的可行性進行了驗證。Modeling and simulating of variable parameters induction motors in electric vehicle applications
電動汽車感應電機的時變模型與計算機模擬On this basis, the safety monitoring time - varying model of concrete dam ' s deformation and corresponding calculation program are developed
在此基礎上，構建了混凝土壩變形安全監控時變模型，並編制了相應的計算程序。Thus, the inner parts are found which are the main factors of the total accuracy loss. this result can offer the basis to improve the design of dynamic measurement system and to increase its measuring accuracy. in order to prove the theory of the error tracing and accuracy - loss diagnosis of the dynamic measurement, two simple measuring system are selected, that is, pressure transducer system and the dynamic measuring system based on differential mutual inductive displacement transducer
根據建立的動態系統誤差模型，以誤差溯源結果為依據，用bp神經網路分析方法，求得系統各組成單元的精度損失規律，建立其精度損失時變模型，從而找出對測量系統的總精度損失影響較大的內部組成單元，為改進動態測量系統的設計、提高其測量精度提供依據。( 5 ) basing on the exploring of the functions of cohesion force and friction force during rheology course and the assumptin that viscosity lost according viscosic strain, a constitutive model for viscous, elastic and plastic rock is set up, which can simulate the third course of creep. then the impact of transcient damage to rheology is discussed and corresponding creep model for rock is proposed
（ 5 ）在探導巖石顆粒間粘聚力和顆粒間摩擦力在巖石發生流變過程中的作用基礎上假設粘性失效按流變應變統計概率分佈，建立了巖石粘彈塑性本構關系，能夠描述巖石蠕變加速階段特徵；討論了瞬時損傷對巖石流變的影響和相應的損傷蠕變模型建模問題。Face detection based on high effective and discriminative adaboost algorithm with lots of face and non - face images for training, the computer is able to detect multi - view face area from video stream
實時人臉對齊系統採用經優化后的形變模型演算法，使得計算機能在已知的人臉區域中實時定位人臉的五官，為之後的準確識別人臉提供先決條件。Based on the iterative methods and general analytical solution available for the problem of one - dimensional linear elastic consolidation of layered soils, a semi - analytical method is established herein for complex one - dimensional consolidation problems. by adopting linear rheological model of three units and non - linear rheological model of time lines, the semi - analytical method is respectively applied to solve the problem of one - dimensional consolidation of layered soft clayey soils with linear or non - linear rheological characteristics
基於多層地基?維線彈性固結解析解和迭代法，建立了能求解復雜一維固結問題的半解析演算法，並將其分別應用於求解成層軟粘土線性流變一維固結問題（採用三元件線性流變模型）和成層軟粘土非線性流變一維固結問題（採用時間線非線性流變模型） 。Based on the analysis of failure features, deformation shapes, the failure mechanism of weak - rock roadway is studied systematically. optimal supporting time model of bolt - grouting support is given with different methods when analyzing the bolt - grouting supporting mechanism at large. in order to study bolt - grouting supporting mechanism systematically with simulation method in heavily stressed weak - rock coal and rock roadway of huaibei mine, fem models under different conditions are found by using fem program - ansys. finally, construction technics, grouting parameters, and so forth, are studied and applied in the coal and rock roadway of taoyuan and qinan mines
在對深部高應力軟巖巷道變形破壞特徵、變形破壞形態分析的基礎上，對巷道變形破壞機制進行了較為系統地研究；接著在對錨注支護機理進行了詳盡分析的同時，提出了最佳錨注支護時間（段）的概念，並建立了最佳錨注支護時間模型；以淮北礦區深部高應力軟巖煤、巖巷道為背景，採用大型有限元軟體ansys ，分別建立了不同條件下的數值計算模型對錨注支護進行了較為全面系統的數值模擬研究，得出了一系列有價值的結論。This is investigated upon a mathematical model of ifn - induced jak - stat signaling pathway by applying robustness analysis which is based on a broad range of simultaneous and systematical parameters variation
我們對細胞的jak - stat信號建立了數學模型，同時系統地改變模型中的動力學參數反應速率參數，然後進行大量的數值模擬實驗。分享友人