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Geometrically Nonlinear Behavior of Axisymmetric Thin Spherical Shells
Issue:
Volume 2, Issue 6, December 2017
Pages:
57-62
Received:
28 September 2017
Accepted:
7 November 2017
Published:
5 December 2017
Abstract: This article presents a geometrically nonlinear formulation of a two node axisymmetric shell element. The geometrically nonlinear formulation is based on the Total Lagrangian approach and the material behavior is assumed to be linearly elastic. The spherical arc-length procedure is used to obtain the pre-buckling, buckling and post-buckling deformation path. Some numerical examples are solved to demonstrate geometrically nonlinear behavior of elastic thin spherical shells subjected to various loads.
Abstract: This article presents a geometrically nonlinear formulation of a two node axisymmetric shell element. The geometrically nonlinear formulation is based on the Total Lagrangian approach and the material behavior is assumed to be linearly elastic. The spherical arc-length procedure is used to obtain the pre-buckling, buckling and post-buckling deforma...
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Analysis of Mathematical Models and Influence of Constructions of High Efficient Heat Transfer Devices
Alijon Abdiraupovich Kholikov,
Hamrokul Kuvandikovich Sayidov,
Murodjon Hamidjonovich Beshimov
Issue:
Volume 2, Issue 6, December 2017
Pages:
63-67
Received:
20 March 2017
Accepted:
11 November 2017
Published:
13 December 2017
Abstract: According to the research on mathematical model of the influence of constructions of porosity of the wick depending on diameter of the wires and impact of porosity, as well as factors such as distilled water and alcohol on coefficient of thermal conductivity, on coefficient of heat transfer devices. The conducted analysis of the parameters of influence of constructions of high efficient heat transfer device (HEHTD or thermal pipes) on power of density of the heat flow. The carried out calculations are necessary for making average temperature heat transfer devices.
Abstract: According to the research on mathematical model of the influence of constructions of porosity of the wick depending on diameter of the wires and impact of porosity, as well as factors such as distilled water and alcohol on coefficient of thermal conductivity, on coefficient of heat transfer devices. The conducted analysis of the parameters of influ...
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Determination of Optimal Supply When Demand Is a Sum of Components
Vijayakumar Raman,
Venkatesan Thirunavukkarasu,
Muthu Chinnathambi
Issue:
Volume 2, Issue 6, December 2017
Pages:
68-74
Received:
27 September 2017
Accepted:
7 November 2017
Published:
14 December 2017
Abstract: Among the various inventory systems our method is used to find the optimal supply size. To find the optimal supply size taking in to consideration the aspects like inventory holding cost per unit, cost of shortage per unit etc., In many situation the demand taken to be a random variable. The total demand is in turn a sum of three random variables namely (i) demand due to consumers (ii) demand due to the supply of the product to sister concerns or companies. (iii) Demand due to replacement of defective items that are not accepted and hence exchanged for new units Under these assumptions the optimal supply size is derived.
Abstract: Among the various inventory systems our method is used to find the optimal supply size. To find the optimal supply size taking in to consideration the aspects like inventory holding cost per unit, cost of shortage per unit etc., In many situation the demand taken to be a random variable. The total demand is in turn a sum of three random variables n...
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Compressed Sensing Algorithm for Real-Time Doppler Ultrasound Image Reconstruction
Sulieman Mohammed Salih Zobly
Issue:
Volume 2, Issue 6, December 2017
Pages:
75-80
Received:
31 January 2017
Accepted:
6 March 2017
Published:
18 December 2017
Abstract: A Doppler ultrasound signal has been reconstructed using different compressed sensing algorithms. With compressed sensing it’s possible to reconstruct signals and images using a few numbers of measurements so as to overcome the limitation of sampling in a real-time Doppler ultrasound sonogram. In this work we want to compare different compressed sensing algorithms used for Doppler ultrasound signal reconstruction so as to select the best algorithm that, gives a real-time Doppler ultrasound image and maintain quality. The result shows that regularized orthogonal matching pursuit reconstruction algorithm reconstructs the Doppler signal and gives Doppler spectrum in a real-time with high quality also ℓ1-norm reconstructs the Doppler signal and gives Doppler spectrum with a good quality, but the reconstruction time was very long.
Abstract: A Doppler ultrasound signal has been reconstructed using different compressed sensing algorithms. With compressed sensing it’s possible to reconstruct signals and images using a few numbers of measurements so as to overcome the limitation of sampling in a real-time Doppler ultrasound sonogram. In this work we want to compare different compressed se...
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