在I-V特性曲线上具有双微分负阻的三稳态共振隧穿器件,室温下可以达到较高的电流峰谷比5。
The tristable resonant tunneling devices(RTD)with a double negative differential resistance in its I-V characteristics have a high current ratio(5.
本文对双极性微波功率晶体管(以下简称微波功率晶体管)求解了稳态工作条件下的三维热传导方程。
The three-dimensional heat conduction equation for steady state operating conditions of bipolar microwave power transistors has been solved.
稳态概率、状态频率和持续时间是高压直流系统可靠性评估中的三个主要可靠性指标,一般用数值方法求解。
Steady-state probability, frequency and duration are the three main indices in reliability evaluation of the HVDC systems. Generally, they are solved by numerical methods.
对三维准稳态激光重熔问题进行数值模拟,模型考虑了熔池内金属液体的流动和换热。
With the non staggered grids, a three dimensional quasi state laser remelting problem, considering heat transfer and fluid flow, is numerically simulated.
基于一维不稳态导热分析解,提出一个在第三类边界条件下的二维和三维不稳态加热时间的计算方法。
Based on the one dimensional analytical solution, a new calculation of two dimensional and three dimensional unsteady heating time is provided under the third boundary conditions.
采用有限元分析软件ANSYS,对某大型固定管板式换热器管板的稳态温度场和热应力场进行了三维有限元分析。
By use of finite element analysis software ANSYS, the steady-state temperature field and thermal stress field in the tubesheet of a large fixed tubesheet heat exchanger were analyzed.
本文对车用风冷发动机汽缸盖的非稳态温度进行了实测,分析了启动、突加和突减三种过渡工况下汽缸盖温度的变化规律。
This paper measured the non steady state temperature field of cylinder head in an air cooled engine. It analysed the temperature variation under transient operating conditions of engine.
建立了硬质合金烧结-热等静压炉内传热的三维非稳态数值仿真模型,对炉内的温度场进行仿真与优化。
A three dimensional unsteady numerical model of cemented carbide sinter-HIP furnace was established. The temperature field was simulated and optimized with this model.
以流体力学三大守恒方程为基础,建立了等温和非等温条件下的燃气管网稳态和动态仿真理论模型。
The theoretical dynamic simulation models for stationary flow and transient flow under the isothermal and non-isothermal condition are set up based on the three conservation equations.
稳态控制采用三层控制方式,将控制分为模糊回路控制层、解耦系数控制层和目标优化控制层。
The steady state control adopts three-level control mode, including fuzzy control, decoupled coefficient control and target optimization control.
从双口网络的Z参数、Y参数出发,推导了星形、三角形网络转换在正弦稳态电路中的转换公式,引出其应用条件。
In this paper, starting from the conversion of Z parameters and Y parameters of two-port parameters, we deduce the formulas of wye-delta network transformation in sinusoidal steady-state.
同时,我们还以电导法和稳态荧光法研究了多巴胺与阳离子表面活性剂十六烷基三甲基溴化铵(CTAB)胶束体系的相互作用。
We also studied the interaction between dopamine and the cationic surfactant sodium dodecyl sulfate (CTAB) by the methods of conductivity and the steady state fluorescence.
通过求解三维层流N-S方程,得到了端面气膜稳态压力场及速度场分布,分析了气体在端面间隙内的流动形式。
The three-dimentional laminar Navier-Stokes equations were solved for getting the gas film pressure and velocity distributions in the steady state, and the flow styles in the clearance were analyzed.
针对一种蓄热推钢式加热炉三个加热区的炉温稳态优化问题,本文提出了一种混合粒子群优化(HPSO)方法。
A hybrid particle swarm optimization (HPSO) approach is presented to solve the problem of optimizing the steady-state temperatures of the three zones of a billet reheating furnace.
本文归纳了世界各国或地区针对汽车横向稳定性的相关试验评价方法,并提出按静态测试、稳态测试和极限工况测试三种方法进行分类测试。
The author summarizes the various countries or regions for the relevant vehicle lateral stability tests and assessment, and proposes the static test, steady state test and extreme condition test etc.
针对幂律型流体,建立了稳态三维粘性不可压缩流体非等温流动的有限元模型。
The modeling for three-dimensional incompressible viscous non-isothermal steady flow was presented by using penalty finite element method.
采用稳态极化技术研究了三相线长度、宽度及溶液浓度在金属腐蚀阴极过程中的作用。
The effect of the TPB zone on the cathodic process of metals was studied by steady-state polarization test.
湍流是一种高度复杂的三维非稳态、带旋转的不规则流动。
Turbulence is an extraordinarily complex three-dimensional flow which is unsteady, inerratic and composed of eddies.
该模型充分考虑了由摇摆振动引起的附加惯性力的作用,属非稳态三维波动层流问题。
The model, which includes the effect of additional inertia forces by vacillation, describes a problem of unsteady three-dimension wavy laminar falling film absorption.
应用CD4098单稳态触发器组成了三相过零触发电路,达到了较为理想的调功效果。
The three-phase zero-detection trigger made up of CD4098 single side stale trigger can produce ideal effect.
当交流系统发生三相不对称故障时,忽略直流系统负序分量的准稳态模型将给交直流混合系统的仿真带来较大的误差。
The QSS (Quasi Steady State) model of converter which neglects the negative impedance of DC system will bring some errors when unbalanced fault occurs in AC system.
用有限元法计算模拟了三角均匀分布侧面泵浦结构激光棒瞬态温升过程及稳态温度分布情况。
The temperature field and warming process of the transient and steady state in the laser rod by symmetrical trigonal side-pumping were simulated using the finite element analysis method.
地铁车站内的空气流动是极其复杂的三维非稳态湍流流动。
The airflow in subway station is complicated three-dimensional unsteady turbulent flow.
从三进制数字基带信号入手,结合二进制,利用交变波、稳态波分析了任意多进制数字基带信号的频谱特性。
This article proceeded with tri - nary baseband signal combining with binary ones, and then analyzed multi -nary digital baseband signal's frequency spectrum based on alternating wave and steady wave.
目前攀援激活的计时作用神经机制有三种主要观点:膜电流假说、双稳态单元假说、线性整合假说。
There are three main perspectives about the timing neural mechanism of climbing activity:membrane voltage, bistable units, and line attractors.
连铸结晶器内钢液的传热可视为一个稳态过程,可用依赖于拉坯速度的三维稳态热传导方程描述。
The heat transfer of steel fluid in continuous casting mould is a stable process and can be depicted with three-dimensional stable heat conduction equation depending on tension speed.
应用计算流体力学(CFD)方法对转动坐标系下的三维环形密封流场进行了准稳态数值模拟,在此基础上进行了转子动力系数的计算。
Three dimensional annular seal flow field was simulated quasi-steadily with computational fluid dynamics (CFD) method in a rotating reference frame. The Rotordynamic coefficients were calculated.
阐述了三峡库区边坡稳态3s实时工程分析系统的基本框架及其研究内容。
The con tents and basic frame of the 3s engineering analysis system of the slope stability in the Three Gorges area are also expounded.
建立了对基于电压空间矢量pwm的三相高功率因数整流器实现电流稳态无差拍控制的设计准则。
Set up the circuit design criterion for the steady - stage deadbeat control to the line current of a three - phase high-power-factor rectifier based on voltage space-vector PWM.
本文将三维势流理论应用于压水堆上腔室稳态流扬分析。
The three dimensional potential flow theory is applied to the analysis of the steady flow field of PWR upper Plenum.
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