共查询到20条相似文献,搜索用时 15 毫秒
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L. Yang J. R. Watling F. Adamu-Lema A. Asenov J. R. Barker 《Journal of Computational Electronics》2004,3(3-4):171-175
By including soft-optical phonon scattering within an ensemble Monte Carlo simulator, this paper studies the impact of high-κ gate stacks on the performance of n-type Si and strained Si MOSFETs. The simulated devices replicate the performance of sub-100 nm Si and strained Si MOSFETs fabricated by IBM. The results indicate a significant reduction in the device performance due to the presence of a high-κ gate dielectric in both Si and strained Si transistors. 相似文献
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An Improved Energy Transport Model Suitable for Simulation of Partially Depleted SOI MOSFETs 总被引:1,自引:0,他引:1
H. Kosina M. Gritsch T. Grasser T. Linton S. Yu M.D. Giles S. Selberherr 《Journal of Computational Electronics》2002,1(3):371-374
When applied to partially depleted SOI MOSFETs, the energy transport model predicts anomalous output characteristics. The effect that the drain current reaches a maximum and then decreases is peculiar to the energy transport model. It is not present in drift-diffusion simulations and its occurrence in measurements is questionable. The effect is due to an overestimation of the diffusion of channel hot carriers into the floating body. A modified energy transport model is proposed which describes hot carrier diffusion more realisticly and allows for proper simulation of SOI MOSFETs. 相似文献
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Three-dimensional simulation based on a non-equilibrium Green’s function method including electron-phonon interaction and Si/SiO2 interface roughness has been performed for ultra-small FinFETs. Comparing the simulated drain-current–gate-voltage characteristics with those obtained in the ballistic limit, effects of the scatterings on the device characteristics are discussed. Threshold voltage fluctuation is also discussed. 相似文献
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Jing Wang Eric Polizzi Avik Ghosh Supriyo Datta Mark Lundstrom 《Journal of Computational Electronics》2004,3(3-4):453-457
In this work, we present a quantum mechanical approach for the simulation of Si/SiO2 interface roughness scattering in silicon nanowire transistors (SNWTs). The simulation domain is discretized with a three-dimensional (3D) finite element mesh, and the microscopic structure of the Si/SiO2 interface roughness is directly implemented. The 3D Schrödinger equation with open boundary conditions is solved by the non-equilibrium Green’s function method together with the coupled mode space approach. The 3D electrostatics in the device is rigorously treated by solving a 3D Poisson equation with the finite element method. Although we mainly focus on computational techniques in this paper, the physics of SRS in SNWTs and its impact on the device characteristics are also briefly discussed. 相似文献
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用ANSYS软件包模拟半导体器件散热器稳态热阻 总被引:3,自引:0,他引:3
介绍了ANSYS多物理场软件包的流动传热仿真分析特点、功率半导体器件用的散热器稳态热阻的理论分析及计算仿真的基本过程。所得出的一系列仿真结果与实验数据是吻合的,证明了仿真理论的正确性。 相似文献
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汽轮机汽缸壁温及胀差全工况仿真数学模型 总被引:1,自引:2,他引:1
葛晓霞 《中国电机工程学报》1995,15(5):311-316
本文采用数值传热学有关理论和方法,以及汽轮机启停时的实测数据,建立了汽轮机汽缸壁温及胀差全工况仿真数学模型,该模型理论清晰,精度满足实用需要,计算速度快,符合实时仿真要求。 相似文献
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We present a three-dimensional device simulator, suitable for the study of a wide range of nanoscale devices, in which quantum confinement and carrier transport are taken into account. In particular, depending on the confinement, the 1D, 2D or 3D Schrödinger equation with density functional theory in the local density approximation is coupled with the Poisson equation in the three-dimensional domain. Continuity equation in the ballistic and in the drift-diffusion regime are also solved assuming separation of the subbands. 相似文献
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环栅喷淋泡沫塔欧拉–离散相模型三相除尘模拟 总被引:3,自引:0,他引:3
采用欧拉(Euler)多相流模型与离散相模型(discretephase model,DPM)对脱硫除尘实验装置内部的气液固三相流流动进行三维湍流数值分析。在Euler坐标系中采用双流体模型来表述气液两相的相互耦合,同时在拉格朗日坐标系中考察颗粒的运动,把烟尘颗粒对气液两相的影响耦合于双流体模型中。通过对流场数值模拟计算结果的实验验证,得出此数学模型的可行性;分析脱硫除尘塔内部流场流动,得出气液固三相流特征,为脱硫模拟及结构优化设计提供依据;得出脱硫除尘塔除尘效率与颗粒粒径、进气风速、喷淋液气比等参数的相互关系;得出脱硫除尘塔进出口压差与烟气流量、液气比、烟尘浓度等参数的相互关系。 相似文献
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为了解罗氏线圈的动态特性,基于分布参数模型研究了一种Rogowski线圈仿真的分裂算法。该法将Ro-gowski线圈等分成若干段,提出每段Rogowski线圈离散时间的等效动态电源模型和Rogowski线圈的离散时间电路模型。该模型在任意长时间内与Rogowski线圈等效,而非在一个积分步长内,这降低了仿真的计算量;描述此模型的参数具有明确的物理含义,不仅可以通过计算求得,也可以通过测量确定,且具有最简单的电路结构和数学描述,可方便地应用于电流互感器装置的仿真之中。提出的方法适用于对均匀和非均匀绕包的罗氏线圈进行高精度的仿真,且方法简单、计算量少,易于实现编程,为罗式线圈电流互感器的研制提供了有效的仿真手段。 相似文献
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A mathematical-physical model to describe the current response of p-type SrTiO3 ceramics in the low-temperature regime upon dc voltage step was developed, utilizing the numerical class library DIFFPACK (Numerical Objects, Norway). The current response in the time domain shows the experimentally observed Maxwell-Wagner relaxation (space charge polarization), followed by leakage current, and, eventually, resistance degradation. The relaxation behavior is analyzed by means of the simulation results for the spatial profiles of the electrical potential and the respective point defects. The impact of bias voltage and grain boundaries on the relaxation time is investigated. The simulation results are compared with experimental data. 相似文献
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电磁轴承开关功率放大器本质是非线性系统,通常在对电磁轴承控制系统进行分析时,将电磁轴承开关功放的模型等效为一阶惯性环节的线性模型。由于线性模型不能反映开关功放实际特性,其精度将直接影响磁轴承控制系统稳定性分析。该文对电磁轴承脉宽调制型开关功放,基于谐波平衡原理,建立电磁轴承开关功放的线性化谐波模型。利用该模型对电磁轴承开关功放的特性进行仿真,并将仿真结果同应用SIMULINK中的电力系统工具箱(PSB)建立开关功放模型的仿真结果以及实验结果进行比较,结果基本吻合,验证了所提出的谐波建模方法的正确性和有效性,从而为电磁轴承开关功放的特性分析提供了一种可行的研究方法。 相似文献