نتایج جستجو برای: geometrical designs

تعداد نتایج: 99168  

2016
Pratiksha Gupta Rajesh Mehra

This paper illustrates the design of low-power, high-performance SR flip-flop. The speedy technical trends are engrossing to decrease the geometrical feature size and power consumption of the integrated circuit in VLSI designs. The proposed design shows the comparison with conventional CMOS circuit on the basis of power consumption and propagation delay and can save up to a significant amount o...

Journal: :Technology and health care : official journal of the European Society for Engineering and Medicine 2015
Han Shi Dong Du JianFeng Xu Zhihong Su Qiyu Peng

BACKGROUND Despite being the conventional choice, whole body PET cameras with a 76 cm diameter ring are not the optimal means of human brain imaging. OBJECTIVE In fact, a dedicated brain PET with a better geometrical structure has the potential to achieve a higher sensitivity, a higher signal-to-noise ratio, and a better imaging performance. METHODS In this study, a polyhedron geometrical d...

Journal: :Structural and Multidisciplinary Optimization 2022

Abstract The latest updates on the Vertex Morphing technique for large optimization problems are shown in this work. Discussions about challenges of node-based shape academic and industrial applications included. adaptive is demonstrated, which easy to use practice allows full exploitation potential find new designs large-scale applications. We also show an efficient method handle different phy...

2011
A. Kuhl S. Schnepp A. Angelovski A. Penirschke R. Jakoby

New pickup designs for a Bunch Arrival time Monitor (BAM) at the Free Electron Laser in Hamburg (FLASH) have been developed and simulated [1, 2] with CST PARTICLE STUDIO R ©. With regard to the signal characteristics and manufacturability a cone-shaped pickup was selected as a prospective candidate. At high frequencies, small manufacturing tolerances might have great influence on the pickup sig...

2002
G. Kiziltas J. L. Volakis N. Kikuchi

Design of “new” electromagnetic devices such as antennas, frequency selective surfaces and filters with complex geometry and materials, possibly “new” composites and artificial dielectrics or meta-materials has become a realizable possibility. Some examples for these meta-materials are photonic and electromagnetic band gap materials for optical, millimeter-wave and microwave applications, aniso...

2003

Two different designs, A and B, with notable different geometrical parameters, were compared. The S-Stent was simulated to expand from its as cut configuration on a hyperelastic balloon model under physiological deployment pressure (below 18 atm). The numerical simulation results reveal that stent B, at diametric expansion of 3.3mm OD, experiences a 50.5% reduction in plastic strain and 10% les...

2012
Sophia Haussener Aldo Steinfeld

High-resolution X-ray computed tomography is employed to obtain the exact 3D geometrical configuration of porous anisotropic ceria applied in solar-driven thermochemical cycles for splitting H2O and CO2. The tomography data are, in turn, used in direct pore-level numerical simulations for determining the morphological and effective heat/mass transport properties of porous ceria, namely: porosit...

Journal: :The Journal of the Acoustical Society of America 2014
Paul Luizard Brian F G Katz

Acoustical coupling between architectural spaces can be implemented by sliding or hinged doors. This study compares the effects of these variable coupling area designs on the sound field using temporal energy decay curve analysis. Varying the aperture size alters the multi-slope decay curve properties such as the decay rate of each slope and their point of intersection (time and level). A predi...

1992
Piotr Findeisen

This document presents the Graphical Extension (GE) to the EARA Model, used in the Metaview project. Similar to the EARA Model having two layers: one for describing a development method (environment) and another to describe actual designs or systems for a specific application, GE also has two parts. The first part supplements the environment definition, introducing graphical (geometrical) forms...

2013
Hae-Soo Oh Hyunju Kim Jae Woo Jeong

The mapping method was introduced in [1] for highly accurate Isogeometric Analysis (IGA) of elliptic boundary value problems containing singularities. The mapping method is concerned with constructions of novel geometrical mappings by which push-forwards of B-splines from the parameter space into the physical space generate singular functions that resemble the singularities. In other words, the...

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