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Thin layers of material are commonly occurring structures in many modern integrated photonics devices. As the overall geometric complexity of these integrated structures increases, it is convenient to employ flexible full-wave numerical electromagnetic simulators for their design. In this paper we discuss and present a technique for embedding thin layer material responses into one such numerical technique,...
Modeling of the thermodynamic properties of materials in a wide range of temperatures and densities is interesting as for basic researches as for applications. The equations of state for metals and compounds under high-energy-density conditions are necessary for numerical simulations of hydrodynamic processes in plasmas under pulsed power influences1.
Study of structural phase transitions is of significant interest with fundamental point of view and, at present time, it is a subject of the intensive theoretical and experimental researches in various areas of physics. Such transitions are the phase transformations (of configuration, topology, polymorphic, or solid-liquid transitions) in strongly coupled systems, which consist in a structure reorganization...
In this work we present a versatile simulation tool for the batch processing of solar cell simulation by using Matlab and the wxAMPS console version. The wxAMPS console version gives a programming interface for other software to call the simulation kernel of wxAMPS, and Matlab provides a favorable platform to define the modeling process and design the data visualization. This method offers users a...
For using GPR as a non-destructive testing to the hidden weak points in dam or seawall, how to reasonably analysis the GPR image and obtain the exact interpretations is still an unsolved problem. Combined with the dam engineering features and detection experiences, geophysical models of typical hidden weak points, such as horizontal non-homogeneous layer, slope non-homogeneous zones bearing coarse-grained...
In the immediate aftermath of unconventional emergencies, coordination process of the emergency resources involves many complex factors. How to model the coordination process of the emergency resources, to evaluate the decision performance of the process is among one of the most important issues in the real world. We employ the System Dynamics (SD) method to analyze the feedback mechanism and the...
In terms of future development of stress grading systems for large rotating machines it is required to calculate the electric surface field strength distribution as well as the temperature profile along the stress grading surface with sufficient accuracy. Due to high nonlinear material characteristics the design and optimization of such systems are a very time consuming process. In order to accelerate...
This paper is focused on the development of an effective method to optimization inversion on constitutive model parameters of bird material in the numerical simulation of bird impact on an aircraft windshield. The experiments of bird impact on a plate under the velocity of 170m/s were performed and the displacements as well as the strains of the plate were measured. The Murnaghan Equation of State...
Interfacial delamination in encapsulated silicon devices has been a great reliability concern in IC packaging. Experimental testing of a transparent Quad Flat No Leads Package (QFN) was carried out with the goal of studying delamination characteristics and investigating the viability of cohesive zone modeling (CZM) in simulating delamination patterns and trends. To simplify the study, the package...
Most commercial c-plane InGaN quantum well (QW) LEDs show an early turn-on voltage, which is significantly lower than the value predicted by numerical simulation even with perfect contacts. To make a more realistic structure for simulations, nano-scale Indium fluctuations were included in the QWs. Simulations of current-voltage (I-V) characteristics using a 2D drift-diffusion solver showed much lower...
In order to meet the demand of agricultural materials exchange online for farmers, an agricultural materials exchange platform based on ontology is designed and implemented. A matchmaking algorithm is presented which uses semantic vector space model to determine the match between agricultural materials seekers and advertisers. A matchmaking model is proposed based on OWL. Finally an architecture based...
Hysteresis is a phenomenon encountered in a lot of scientific domains. This paper presents a representation of hysteresis modeling using Preisach algorithm, starting from minimal measured data. Numerical results show a good agreement between theoretical and represented data. Measured data is done for a metro card in case of a transversal and in case of a longitudinal applied field. Presented results...
Cutting stock is concerned with how to saving material, optimize resources in product designing, manufacturing. It is very complicated and difficult in computing theory, but it has got the extensive application in the actual manufacture. In this paper, genetic algorithm optimization of two-dimensional sheet metal nesting design, genetic algorithm is a numerical method for global optimization. Compared...
The distribution of relief materials involves facility location and transportation mode selection. From the viewpoint of integrated optimization in emergency logistics systems, a multiobjective optimization model for location-transportation problem is proposed to minimize the total transportation time and the total system loss. A bidimensional matrix encoding and nondominated sort genetic algorithm...
This paper presents an approach for optimizing paths online for a pursuit-evasion problem where an agent must visit several target positions within a region of interest while simultaneously avoiding one or more actively-pursuing adversaries. This is relevant to applications such as robotic path planning, mobile-sensor applications, and path exposure. The methodology described utilizes cell decomposition...
The design of piled embankments is extremely complex. Arching effect is one of the main reasons why the piles with individual caps can support most part of load. Several methods exist for estimating the magnitude of arching occurring in the embankment fill. This paper proposed a new method, based on the homogenization approach, for calculating the arching effect.
Dynamic simulation model of cobalt-rich crusts cracking process with water jet was estabLished and the cracking process was simulated with numerical calculation. With simulation research, cobalt-rich crusts water jet cracking mechanism is obtained. Simulation results show that during the cracking process, there is an initial crack in cobalt-rich crusts surface, which is generated by compressive crack...
A numerical analysis on the portal of two parallel tunnels is carried out, to learn about the effect on the staggered space of two tunnels to the liner stress of tunnel's portal. Thirty numerical models have been founded for analysis base on the different of staggered space of the two parallel tunnels. The results show that: if the clear distance and the separated mileage make change, the extreme...
The paper addresses features of EMC which make it a particularly challenging modeling applications. These features include the very broadband nature of the interactions taking place thus encompassing regions of non-linearity and of uncertain parameter values; the inherent uncertainties in the geometrical configurations and dimensions of the multitude of components; and the ubiquitous presence of multi-scale...
In this paper we deal with full-wave modelling of pulsed terahertz systems utilized in non-destructive testing. At the outset, some basic information on the terahertz NDT and next general remarks on its numerical modelling are presented. Frequency domain FEM and time domain FDTD analysis is carried out. Finally comparison of computed and measured signals is shown in order to prove numerical analysis...
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