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Advancements in real-time surgical simulation techniques have provided the ability to utilize more complex nonlinear constitutive models for biological tissues which result in increased haptic and graphic accuracy. When developing such a model, verification is necessary to determine the accuracy of the force response as well as the magnitude of tissue deformation for tool-tissue interactions. In this...
With the emergence of high resolution scanning and printing devices, copyright protection for printed materials becomes an important problem in digital image research. After analyzing geometric and pixel value distortion of an image scanned from legal and pirated printed materials respectively, we propose in this paper a copyright protection method based on digital image watermarking. Our algorithm...
Using the numerical code Fishbone, developed to study the parasitic oscillations in gyrotron beam tunnels, a parametric study is performed on the effect of the dielectric material as well as of the slot geometry on the growth rate of the excited parasitic modes.
Antennas are very important in communication wireless systems because of the main part, the sending and reception quality of the information depending on them. Dimensions and geometries of antennas depend on kind system (operation frequency), as well as the manufacturing material. In this research, we present an introduction about antennas design for GPS (f0=1.57542 GHz), considering different geometries...
Although spectral images contain large amount of information, compared with color images, the image acquisition is affected by several factors such as shading and specular highlight. Many researchers have introduced color invariant and spectral invariant representations for these factors using the standard dichromatic reflection model of inhomogeneous dielectric materials. However, these representations...
Electrodynamic field simulations in the frequency domain typically require the solution of large linear systems. During the design process it is desirable to vary specified parameters like the frequency, geometry details as well as material parameters. Initializing an individual calculation to consider all parameter changes is not efficient. Model Order Reduction (MOR) techniques offer an approach...
In this paper, we study the problem of decomposing spectra in hyperspectral data into the sum of pure spectra, or endmembers. We propose to jointly extract the endmembers and estimate the corresponding fractions, or abundances. For this purpose, we show that these abundances can be easily computed using volume of simplices, from the same information used in the classical N-Findr algorithm. This results...
Imaging polarimetry has emerged as a powerful tool for application in the field of remote sensing. In this paper, we present a novel technique for estimating the surface normal angle of each of the individual facets of a target object using passive polarimetric data. The passive polarimetric imaging system described here uses multiple measurements of the output Stokes vectors along with the reflection...
We have developed a new biomimetic actuator for micro robots using inchworm-like segmented solenoids. The electromagnetic impulse-driven micro actuator is composed of 4 solenoids, guide and stopper. We have analyzed the locomotive motion theoretically and numerically, resulted from the sequential impulses by the segmented solenoids. Based on the theoretical results, we have optimized the design parameters...
An analytical description of the static characterization of a smart beam with surface-bonded piezoelectric transducers is developed in this paper. The uniform elastic beam is actuated by piezoelectric patches and modeled as an Euler-Bernoulli beam. The static analysis of the intelligent beam is then given in detail based on a transfer matrix method. Furthermore, the actuation mechanism of the piezoelectric...
We introduce a new spectral mixture analysis approach. Unlike most available approaches that only use the spectral information, this approach uses the spectral and spatial information available in the hyperspectral data. Moreover, it does not assume a global convex geometry model that encompasses all the data but rather multiple local convex models. Both the multiple model boundaries and the model's...
The viability of inter-strata low pitch vertical interconnection technologies is mandatory for 3D applications. In order to increase the connection complexity and to reach a 10µm or even smaller interconnection pitch, a new room-temperature insertion technology has been proposed and developed using micro tubes as inserts [1]. In the present work, we study the load required to obtain a full and efficient...
This paper describes a novel approach for the segmentation of complex images to determine candidates for accurate material-type classification. The proposed approach identifies classification candidates based on image quality calculated from viewing distance and angle information. The required viewing distance and angle information is extracted from 3D fused images constructed from laser range data...
The static response of an intelligent beam with surface-bonded piezoelectric patches is investigated in this paper. Timoshenko beam theory is employed to study the properties of beam-like structures bonded with multiple pairs of PZT patches. Here, only one-dimensional axial deformation of PZT wafers is considered. A shear lag model is adopted to simulate the interfacial bonding between PZT patches...
One of the most valuable plasma characteristics that can be obtained from a Langmuir probe is the Electron Energy Distribution Function (EEDF). Due to the integral relationship between the probe VI characteristic and the EEDF, it is also one of the most challenging aspects of Langmuir probe analysis.
The electronic properties of pristine and B doped triangular graphene sheets have been investigated by using density functional theory calculations. After doping B atom, most of C-C bonds increase and also increase HOMO-LUMO energy gap. The effects of doping on the Milliken charges and molecular distribution have been studied as well.
In order to forecast the using life of the cemented carbide cutting tool on no damage, the easy detecting physical parameter has been found in this paper. The analysis and the test about the relationship between the wear and the thermoelectric potential of YT14 cemented carbide inserts have been finished in this paper. The influence rules and the influence extent of thermoelectric potential to the...
Nanostructured materials, such as those enhanced with carbon nanotube (CNT) arrays, offer great promise for use as wicks in heat pipes and other passive phase-change cooling applications. While such nanostructures feature very small pore sizes which support high capillary pressures, it is shown that the low permeability of these dense arrays prevents their use as the sole fluid transport mechanism...
The potential application of polymer/ceramic capacitors at a higher frequency range is explored through a detailed characterization of several form factors of embedded capacitors. S-parameters of embedded decoupling capacitors using two different types of embedded capacitance material were measured from 500 MHz to 12 GHz. The effect of different geometries, electrode sizes, and materials are demonstrated...
This paper deals with the experimental investigation on a new insulation material called syntactic foam. Syntactic foam consists of hollow glass or plastic microspheres casted into a polymeric matrix material in order to obtain a foam-like structure. The investigations carried out focus on the dependency between breakdown field strength and the volume of the stressed material under dc field stress...
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