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This research giving up new concept for heat flux distribution improvement to SOLO 161 Stirling engine receiver. Stirling engine receiver need some stable heat flux, so the system could operate optimally until 9–10 kWel. Eurodish system operated stirling engine with single parabolic dish, located above the parabolic reflector. This paper developed a new design using dual parabolic dish with Gregorian...
Accurate Power Distribution Network (PDN) design is crucial for Signal/Power Integrity (SI/PI) and Electromagnetic Interference (EMI) compliance. Achieving target power-ground (PG) noise levels for low power complex PDNs requires several design and analysis cycles. Although several classes of analysis tools, 2.5D and 3D, are commercially available, the presence of design tools are limited e.g. parametric...
In this work, collapse of subsea pipelines subjected to external pressure which are dented by foreign objects is investigated through numerical method. The effect of diameter-to-thickness ratio D/t and ovalization caused by denting Δom on the collapse pressure is discussed. Of particular concern is the effect of indenter's shape on the collapse pressure. The collapse behavior between pipelines dented...
Marine dunes are bedforms that, because of their locations and dimensions, can infer with human activities at sea. New MultiBeam Echo-sounder Systems (MBES) enable to collect always more accurate and denser data revealing the diversity of shape, size and dynamics of these features with finer details. Until now, research on dunes have mostly consisted in describing or modeling their morphology and...
Current filaments are inherently three-dimensional phenomena regardless of the chip topography, which can be stripe-or checkerboard-shaped. Therefore, we consider an alter-native mapping of the real-chip IGBT cell topography to a quasi-3D simulation geometry in order to attain a computationally affordable approximation of 3D-filamentation effects that limit the SOA. The new approach extends that of...
An analysis on element shape geometry is presented in this paper to enhance the reflectarray element bandwidth, to produce a more reliable phase distribution over the reflectarray antenna aperture and to have a good reflection element performance. The shape analysis consists of circular patch element, circular ring element and circular square ring element. The reflection coefficient parameter focuses...
PMSM machines with concentrated windings have become more and more popular over the last years. The biggest drawbacks of these machines are high cogging torque and the form of the back EMF. Standard approaches try to shape the back EMF sinusoidal to use standard field orientated control. In the following paper an approach is shown to shape the EMF by using derivative free minimization. Using this...
In this contribution, we present a non-conventional core-shell nanoparticle, named supersphere, for implementing optical devices whose performances cannot be easily achieved with conventional nanoparticles. Superspheres are solids with intermediate shape between a sphere and a cube, whose external boundaries are described by Lamè surface equation. Thanks to its particular shape, a core-shell supersphere...
Recently, fluid filled electrostatic machines have demonstrated specific and volumetric torque density that hold promise to be competitive with electromagnetic machines in niche applications. These demonstrations of variable elastance (dual of reluctance) machines were non-optimized from an electrostatics perspective as their geometry was heavily constrained due to manufacturability. Higher performance...
Spatial database applications for satellite remote sensing data which usually as big data need a data structure that allows spatial query performed at high speed. Selection of storage engine types in MySQL database affects of performances of a spatial query. In this paper, we analyzed performance of a spatial query on various MySQL storage engine types. The test data are radiances of several bands...
We revisit the seminal classical work of T. Sundara Row on the geometry in paper folding published in 1893. After 123 years, the significance of the book remains. This note is intended to provide a short description of Sundara Row’s masterpiece from the viewpoint of the current mathematical theory of origami and show how various geometrical shapes that Sundara Row drew in his book can be produced...
Shape-from-Template (SfT) uses an object's shape template and a deformation law to achieve single-image reconstruction. SfT is a fundamental tool to retexture or augment a deformable object in a monocular video. It has matured for isometric deformations, but the non-isometric case is yet largely open. This is because modeling is generally more complicated and the constraints certainly weaker. Existing...
This paper presents a novel local surface descriptor called rotational contour signatures (RCS) for 3D rigid objects. RCS comprises several signatures that characterize the 2D contour information derived from 3D-to-2D projection of the local surface. The inspiration of our encoding technique comes from that, viewing towards an object, its contour is an effective and robust cue for representing its...
We study the classification with respect to the class of curved Mahalanobis metrics that extend the celebrated flat Mahalanobis distances to constant curvature spaces. We prove that these curved Mahalanobis k-NN classifiers define piecewise linear decision boundaries, and report the performance of learning those metrics within the framework of the Large Margin Nearest Neighbor (LMNN). Finally, we...
In this paper, we will introduce the concept of deformable resection process mapping as a time-varying geometric guide for soft tissue tumor resection procedures. The deformable resection process map (RPM) estimates the local appearance of vascular structures after cuts as a novel guide. The RPM can be directly generated from patient-specific medical images using volumetric resampling techniques....
A combined Migration-MUSIC approach is adopted to deal with the inverse problem of reconstructing the shape of strong scatterers composed of elementary shapes and embedded within an electrically large investigation domain from under-sampled backscattered field data. The scatterers are deployed over a metallic plane, which mimics the ground floor, as in SAR scenarios. In order to mitigate aliasing,...
Quantitative description of blood platelet shape and its dramatic change during activation is necessary for the correct interpretation of light-scattering data, routinely measured in diagnostic laboratories. We propose the model of platelet shape, based on the known information on the cell cytoskeleton. The model geometry is characterized by two parameters: the cell volume and the overcurvature of...
In this paper, we tackle the problem of embedding logos into QR codes. For the ease of visual comprehension by human, it is preferred that the logo should be big, if possible. A logo-embedding scheme, which is referred to as module displacement, is proposed. In module displacement, the data modules that are corrupted by the logo are moved to hide behind those modules that are not corrupted by the...
Virtual reality replaces the existing world with a simulated one. Augmented reality is, however, in real time. The emerging field of Augmented Reality opens up avenues in numerous fields with education being no exception. Our paper proposes an e-learning system for three-dimensional geometry, which makes use of Augmented Reality to enable the user to comprehend the three-dimensional geometry concepts...
Piezoelectric actuator has been used in different applications because of its compact structure compared to magnetic actuators. This paper reports the influence of piezoelectric actuators geometry on the plate vibrating amplitude. Through a Finite Element Method (FEM) approach, we find out the piezoelectric actuator surface area greatly affects the vibrating amplitude. Increasing the piezoelectric...
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