Determination of charge handling capability of a deep depletion charge coupled device based on a three-dimensional numerical simulation

1996 ◽  
Author(s):  
Man Ho Kim
Keyword(s):  
Numerical Simulation ◽  
Three Dimensional ◽  
Charge Coupled Device

DETERMINATION OF THE IMPEDANCE OF A HONEYCOMB RESONATOR BY DEAN’S METHOD AND DIRECT METHOD IN A COMPUTATIONAL EXPERIMENT WITH GRAZING INCIDENCE OF WAVES

Akustika ◽  
2021 ◽  
pp. 25-29
Author(s):  
Igor Khramtsov ◽  
Vadim Palchikovskiy ◽  
Oleg Kustov
Keyword(s):  
Numerical Simulation ◽  
Stokes Equations ◽  
Direct Method ◽  
Three Dimensional ◽  
Grazing Incidence ◽  
Navier Stokes ◽  
Computational Domain ◽  
Sound Waves ◽  
Acoustic Liner

The article considers the determination of the impedance of the acoustic liner sample on the basis of numerical simulation of physical processes in a honeycomb resonator with a grazing incidence of sound waves. The computational domain is the test section of a grazing incidence impedance tube with an acoustic liner sample. The liner sample is a single honeycomb resonator with a depth of 14 mm and an open area percent of 4.2%. Numerical simulation is performed based on the direct solution of the non-stationary compressible Navier-Stokes equations in a three-dimensional formulation. The pressure-time and velocity-time signals are recorded in the numerical simulation and processed by Dean's method and the direct method (from the ratio of acoustic pressure to normal acoustic velocity). The comparison of impedances obtained by the two methods demonstrates a good agreement with each other.

Research on Verification Method of OpenGL Simulated Image Based on Camera Calibration

2014 ◽  
Vol 602-605 ◽  
pp. 3859-3862 ◽  
Author(s):  
Teng Fei Gao ◽  
Zhao Yang Zeng
Keyword(s):  
Numerical Simulation ◽  
Three Dimensional ◽  
Two Dimensional ◽  
Validity And Reliability ◽  
Simulated Image ◽  
Charge Coupled Device ◽  
Verification Method ◽  
Point Pair ◽  
Dimensional Object ◽  
Simulated Images

OpenGL can correctly simulate real photogrammetric imaging by setting reasonable parameters. It’s an important tool to achieve the simulation of real three-dimensional object or scene imaging to two-dimensional CCD (Charge-coupled Device) plane. However, the images are lack of reliability verify. To solve this problem, we propose a method that can verify OpenGL simulated images on the basis of analyzing OpenGL image-forming principle. Firstly, the checkerboard images of different positions are taken by real camera and intrinsic and external parameters are calibrated. Subsequently, we use OpenGL to produce the same intrinsic and external parameters of checkerboard image by setting correct parameters. Finally, the simulated and real images’ matching point pair RMSE value is calculated based on Harris operator. By comparison, the validity and reliability of OpenGL simulated images are verified by some numerical simulation.

scholarly journals Interaction of rack-and-pinion lock parts under external load

2019 ◽  
pp. 105-112
Author(s):  
Evgeniy Gusev ◽  
Viktor Krasavtsev
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
External Load ◽  
Accurate Determination ◽  
Three Dimensional ◽  
Design Criteria ◽  
Finite Element Models ◽  
Dimensional Finite Element ◽  
Three Dimensional Finite Element

This paper describes numerical simulation and analysis of interaction between the parts of rack-and-pinion lock under operational external load, so as to develop design criteria and recommendations for its joints, as well as for more accurate determination of clearances between coamings and hatch covers, required to develop water-tight rubber sealings. These tasks are accomplished by means of detailed three-dimensional finite-element models representing two variants of rack-and-pinion lock, with their further verification. The study included numerical simulation of contact interaction between the parts of the lock, as well as analysis of design solutions for its main joints. As a result, coaming-cover clearances have been determined and manufacturing requirements to rubber sealings of the lock variants under investigation have been successfully formulated.

Conformation of Ribosomes from Escherichia Coli

1974 ◽  
Vol 32 ◽  
pp. 210-211
Author(s):  
M. Boublik ◽  
W. Hellmann ◽  
F. Jenkins
Keyword(s):  
Binding Sites ◽  
Ribosomal Proteins ◽  
Fluorescent Dyes ◽  
Protein Biosynthesis ◽  
Three Dimensional ◽  
Spatial Arrangement ◽  
Dimensional Structure ◽  
Complete Understanding ◽  
And Function

The present knowledge of the three-dimensional structure of ribosomes is far too limited to enable a complete understanding of the various roles which ribosomes play in protein biosynthesis. The spatial arrangement of proteins and ribonuclec acids in ribosomes can be analysed in many ways. Determination of binding sites for individual proteins on ribonuclec acid and locations of the mutual positions of proteins on the ribosome using labeling with fluorescent dyes, cross-linking reagents, neutron-diffraction or antibodies against ribosomal proteins seem to be most successful approaches. Structure and function of ribosomes can be correlated be depleting the complete ribosomes of some proteins to the functionally inactive core and by subsequent partial reconstitution in order to regain active ribosomal particles.

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