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Magnetic flux compression generators (FCGs) driven by high explosives can produce extremely high magnetic fields that are useful in accelerating metal liners and sample materials to high velocities to study their properties. For material studies requiring extremely high energy and applied pressures, explosive FCGs can far surpass the typical performance of capacitor based systems. Flat plate generators...
Through the course of this paper transient thermal conditions were investigated for through hole capacitor models built in SolidWorks. Firstly, the influences of the shape, casing material are determined, after which lifelike models for aluminum electrolytic, ceramic and plastic film capacitors are built and their efficiency regarding forced cooling and thermal power dissipation is investigated.
We explore the problem of characterizing fragments using Par-aView in situ with an explosion simulation. By running in situ we can see a much higher temporal view of the data as well as potentially compress the output to only those statistics about fragments we care about. However, the fragment finding must be able to scale as well as the simulation. In order to achieve the necessary scales, we borrow...
At present work use nonsingular invisibility cloak as carpet is offered. Possibility completely the numerical approach to calculation nonsingular invisibility cloak of arbitrary shape is shown. Numerical simulation of invisibility carpet with arbitrary shapes is lead.
The paper is devoted to comparative analysis of the structure and mechanical properties of leaded-tin bronze with lead inclusions of various morphologies. In order to obtain lead inclusions of certain morphology, casts are cooled at certain velocities. Low cooling velocities cause spheroidizing of lead inclusions, whereas high ones give prolate inclusions with torn uneven surface.
It was investigated the influence of local heterogeneities in the dielectric sample in the form of cylindrical holes of different depths on the parameters of the response signal using a multisensor control system based on the phenomenon mechanoelectrical transformations. The high efficiency of multisensor system to reliably register the local volume defects of small size was shown.
The composite molding process design systems are developed on specific manufacturing resources or specific environment whenever at home and abroad, which enjoys a poor versatility. We built the system structure and flow for composite process integration framework after the computer-assisted resin transfer molding software has been developed. Then, studied the template-based data structure and established...
This paper presents the problem formulation and design of compliant microgripper. The microgripper includes a fixed jaw and a movable jaw for engaging opposite surfaces of the article. Actuation of the compliant mechanism drives the movable jaw toward or away from the fixed jaw to close or open the jaws relative to one another. The travel path of the movable jaw is generally at right angles to the...
Magnetically controlled shape memory alloy (MSMA) can change its shape when it is exposed to a magnetic field, which provides a new way to produce linear motion and force. The MSMA material has another property yet: the MSMA material can change its magnetic property when it is subjected to mechanical force, which is known as inverse characteristics of MSMA. In this paper, a testing device which is...
We propose a novel technique called bispectral photometric stereo that makes effective use of fluorescence for shape reconstruction. Fluorescence is a common phenomenon occurring in many objects from natural gems and corals, to fluorescent dyes used in clothing. One of the important characteristics of fluorescence is its wavelength-shifting behavior: fluorescent materials absorb light at a certain...
We address the problem of recovering shape, albedo, and illumination from a single grayscale image of an object, using shading as our primary cue. Because this problem is fundamentally underconstrained, we construct statistical models of albedo and shape, and define an optimization problem that searches for the most likely explanation of a single image. We present two priors on albedo which encourage...
This paper focuses on the pulsed eddy current (PEC) excitation in nondestructive evaluation (NDE). In conventional eddy current NDE, where the harmonic excitation is used, the optimal inspection frequency for detection and evaluation of expected defects depends on material thickness and its electromagnetic properties. In PEC a single pulse can, in principle, generate a wide range of frequency components...
This paper presents the results of evaluation of several methods commonly used in coastal engineering practice for equilibrium beach profile calculation. Three approaches were used to calculate the shape of equilibrium beach profile: the Bruun-Dean formula, the method prescribed by Coastal Structure Construction Code, and numerical modeling by SBEACH. The calculation results were compared with the...
This paper proposes to apply parallel transport and statistical atlas techniques to quantify 4D myocardial motion abnormalities. We take advantage of our previous work on cardiac motion, which provided a continuous spatiotemporal representation of velocities, to interpolate and reorient cardiac motion fields to an unbiased reference space. Abnormal motion is quantified using SPM analysis on the velocity...
The transition to lead free solders has accentuated the inherent reliability problem in electronic packaging caused by thermo mechanical mismatch between different parts of an assembled system. To mitigate this problem, polymer core solder balls (PCSBs) have been proposed as a mechanically more flexible and therefore more reliable alternative to solid solder balls normally used for such applications...
Hyper-redundant manipulators can be fragile, expensive, and limited in their flexibility due to the distributed and bulky actuators that are typically used to achieve the precision and degrees of freedom (DOFs) required. Here, a manipulator is proposed that is robust, high-force, low-cost, and highly articulated without employing traditional actuators mounted at the manipulator joints. Rather, local...
In this paper, we describe the rolling of a tensegrity robot driven by a set of pneumatic soft actuators. Tensegrity is a mechanical structure consisting of a set of rigid elements connected by elastic tensional elements. Introducing tensegrity structures, we are able to build soft robots with larger size. Firstly, we show the prototype of a six-strut tensegrity robot, which is driven by twenty-four...
In this paper, we investigate the frequency response and materials composition of a crossed-dipole FSS)Frequency Selective Surface). Moment methods in spectral domain, are employed to gain reflection coefficients of crossed-dipole FSS for both polarizations, providing valid analysis, especially in practice. The appropriate properties of crossed-dipole shape, in both its fabrication and its analysis,...
In this study, we address the issue on multilevel object recognition. The multilevel object recognition is object recognition in various levels, that is, simultaneous recognition of its instance, category, material, etc. At each level, many recognition methods have been proposed in the literature. Therefore it is straightforward to design a multilevel object recognition system using conventional methods...
Capturing appearance of material with respect to illumination and viewing directions is crucial to achieve realistic visual experience in virtual environments. The capturing process is time demanding or requires a specific shape of the captured material. Therefore, we propose a method of such a data reconstruction from very sparse measurements, whose placement allows for continuous and fast acquisition,...
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