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A Method for Deriving Quantum Dynamic Equations from Classical Mechanics
Issue:
Volume 5, Issue 6, November 2017
Pages:
80-83
Received:
14 August 2017
Accepted:
6 September 2017
Published:
11 October 2017
Abstract: Based on the operator theories and Hamiltonian canonical equation, an operator based quantum dynamics equation is established, which has the same effect as the Hamiltonian equation in describing the state evolution of quantized dynamical systems. As the reasonable verification of this equation, Schrodinger equation can be derived theoretically, and the variational principle properties of quantum mechanics are revealed. This work will help to promote the development of quantum theory and to perfect the axiomatic system of quantum mechanics.
Abstract: Based on the operator theories and Hamiltonian canonical equation, an operator based quantum dynamics equation is established, which has the same effect as the Hamiltonian equation in describing the state evolution of quantized dynamical systems. As the reasonable verification of this equation, Schrodinger equation can be derived theoretically, and...
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Connection of Thermopower, Magneto Thermopower with Resistivity and Magnetoresistivity in Nd(1-x)SrxMnO3 and Sm(1-x)SrxMnO3 Manganites
Liudmila Koroleva,
Ivan Batashev,
Artem Morozov,
Anatol Balbashov,
Henryk Szymczak,
Anna Slawska-Waniewska,
Sabina Lewinska
Issue:
Volume 5, Issue 6, November 2017
Pages:
84-90
Received:
27 August 2017
Accepted:
15 September 2017
Published:
13 October 2017
Abstract: An experimental study of thermopower, magneto thermopower, magnetoresistivity and magnetization of Nd(1-x)SrxMnO3 and Sm(1-x)SrxMnO3 with 0 ≤ х ≤ 0.3 was conducted. A steep rise of thermopower as well as giant values of magneto thermopower and magnetoresistivity were observed near Curie temperature ТС in compounds with 0.15 ≤ х ≤ 0.3. On the other hand, no special features were found in case of х = 0. It has been known that compounds with 0.1 ≤ х ≤ 0.3 consist of ferromagnetic clusters of ferron (magnetic polaron) type located in A-type antiferromagnetic matrix. An increase of thermopower near ТС is caused by ferrons as with the application of magnetic field or temperatures higher than ТС thermopower falls sharply due to the destruction of ferrons. So, the value of thermopower is directly connected to the number of magnetic polarons in sample. Therefore, thermopower in doped magnetic semiconductors is determined by level of doping and volume of the sample.
Abstract: An experimental study of thermopower, magneto thermopower, magnetoresistivity and magnetization of Nd(1-x)SrxMnO3 and Sm(1-x)SrxMnO3 with 0 ≤ х ≤ 0.3 was conducted. A steep rise of thermopower as well as giant values of magneto thermopower and magnetoresistivity were observed near Curie temperature ТС in compounds with 0.15 ≤ х ≤ 0.3. O...
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Research on Calibration Method of 7kV Single Voltage Pulse for IGBT Models Test System
Liu Chong,
Li Jie,
Kan Jingsong
Issue:
Volume 5, Issue 6, November 2017
Pages:
91-94
Received:
25 August 2017
Accepted:
27 September 2017
Published:
20 October 2017
Abstract: Power IGBT module is widely used in high power conversion applications in various fields because of the advantages of high voltage and high current applications. In order to avoid the influence of temperature rise to the device measurement, pulse test method is widely used to test its static and dynamic parameters, So there are single high pulse voltage source and single pulse high current source in power IGBT modules test instruments. For now in the metrology field, how to calibrate its Single High Pulse Voltage source is a difficult problem. Now the amplitude of single high pulse voltage source is above 7kV with the pulse width as 50 microseconds. Based on detailed research on the test principles of the power IGBT modules test instruments, the pulse high voltage divider and the data acquisition unit are used to setup a calibration device for Single High Pulse Voltage source to calibrate the amplitude of Single High Pulse Voltage source. Resistors are usedto develop the pulse high voltage divider, and did carefully research on the pulse response time, voltage dispersion, voltage regulation of the pulse high voltage divider. Also the data acquisition unit with 20MHz bandwidth and 100MS/s acquisition rate is evaluated through tests including vertical accuracy test, bandwidth test, rise time test, comparison test and etc.. Through above relevant test results, with the comprehensive consideration of the influence of each measurement uncertainty component, It have finished that the evaluation of the uncertainties of the amplitude measurement for Single High Pulse Voltage source. The uncertainty of measurement is better than 2% with the coverage factor as 2.
Abstract: Power IGBT module is widely used in high power conversion applications in various fields because of the advantages of high voltage and high current applications. In order to avoid the influence of temperature rise to the device measurement, pulse test method is widely used to test its static and dynamic parameters, So there are single high pulse vo...
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Study on Compression of ICF Fuel in Rocket Model
Issue:
Volume 5, Issue 6, November 2017
Pages:
95-98
Received:
21 August 2017
Accepted:
11 September 2017
Published:
20 October 2017
Abstract: Compression of Inertial Confinement Fusion (ICF) fuel as required by Lawson Criterion has been of immense value in ICF studies. In this work, the order of compression has been studied on Rocket Model because a high-order reaction force responsible for compression may be seen to act as a rocket motion. It has been seen that the order of compression of lighter fuel such as D-T may be more effective if irradiated by high power Nd laser. The shocks produced as the reaction (Rocket effect) to the surface ablation generated by pulsed laser beams, compress the fuel which is estimated to be effective when the ratio of initial mass to the accelerated one is of the order of 5. The maximum achievable compression by a single strong shock is not more than 4 for a monatomic gas. For weak coalescing shocks to achieve adiabatic compression, the ablation efficiency is found to be maximum when target velocity equals nearly twice the ablation velocity. In such a case, the implosion efficiency of Rocket Model is found to be about 67 percent; neglecting heat loss.
Abstract: Compression of Inertial Confinement Fusion (ICF) fuel as required by Lawson Criterion has been of immense value in ICF studies. In this work, the order of compression has been studied on Rocket Model because a high-order reaction force responsible for compression may be seen to act as a rocket motion. It has been seen that the order of compression ...
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Simulation of Multipacting with Space Charge Effect
Issue:
Volume 5, Issue 6, November 2017
Pages:
99-105
Received:
11 August 2017
Accepted:
25 September 2017
Published:
6 November 2017
Abstract: The electron multiplication on surfaces exposed to an oscillating electromagnetic field causes the phenomenon of multipacting, which can degrade significantly the performance of vacuum RF devices, especially accelerating cavities. It is a serious obstacle to be avoided for normal operation of particle accelerator and their RF components. Many types of room temperature and superconducting accelerating cavities are designed and produced at Fermilab for different projects. The extensive simulations of multipacting in the cavities with updated material properties and comparison of the simulation results with experimental data are routinely performed during electromagnetic design of the cavities. The new advanced computing capabilities made it possible to take the space charge effect into account in the multipacting simulations. The basic new features of multipacting process that appear due to the space charge effect are shown for the classic case of the parallel plates and discussed. As the first practical application of the multipacting simulations with space charge effect the study of multipacting in the low-beta and high-beta 650 MHz elliptical superconducting cavities is also presented.
Abstract: The electron multiplication on surfaces exposed to an oscillating electromagnetic field causes the phenomenon of multipacting, which can degrade significantly the performance of vacuum RF devices, especially accelerating cavities. It is a serious obstacle to be avoided for normal operation of particle accelerator and their RF components. Many types...
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The Method of Calculating the Spectral Sensitivity of Solar Cells
Krutikov Vladimir Nikolaevich,
Parfentiev Nikolay Andreevich
Issue:
Volume 5, Issue 6, November 2017
Pages:
106-108
Received:
22 June 2017
Accepted:
5 July 2017
Published:
8 November 2017
Abstract: A new method for calculation the spectral sensitivity of solar cells based on data obtained by measurement of differential sensitivity. As follows from the conducted analysis, measurements of cells can be carried out only at a constant spectral composition of background radiation. In particular with a single powerful lamp is repositionable relative to the cell. In the practical application of the method is expected to increase the accuracy of determining the spectral sensitivity, especially in the region of large wavelengths, where there is the maximum nonlinearity of the dependence of a current on irradiance.
Abstract: A new method for calculation the spectral sensitivity of solar cells based on data obtained by measurement of differential sensitivity. As follows from the conducted analysis, measurements of cells can be carried out only at a constant spectral composition of background radiation. In particular with a single powerful lamp is repositionable relative...
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A Singular Point in the Characteristics of the Serial RLC Circuit
Parfentiev Nikolay Andreevich,
Parfentieva Natalia Andreevna
Issue:
Volume 5, Issue 6, November 2017
Pages:
109-112
Received:
18 August 2017
Accepted:
4 September 2017
Published:
8 November 2017
Abstract: It is shown that the frequency characteristics of the RCL serial circuit have a special point at which the modulus of the complex resistance is not dependent on resistance. Is investigated the existence region of the real model of the serial circuit. A comparison of different schemes of resonant circuit is provided. Is reviewed previously unknown properties of the classical model of the resonant circuit. Apart from the fact that knowledge is never too much, can be developed new methods of measuring the parameters of electrical circuits, based on open source phenomena. It is also possible that an outdoor phenomenon has a physical explanation. Is a diagram of the mechanical model with similar properties.
Abstract: It is shown that the frequency characteristics of the RCL serial circuit have a special point at which the modulus of the complex resistance is not dependent on resistance. Is investigated the existence region of the real model of the serial circuit. A comparison of different schemes of resonant circuit is provided. Is reviewed previously unknown p...
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Elastic Electron Scattering from 88Sr and 89Y Nuclei
Sara Shaker Mutor,
Altaf Abdul Majeed Al-Rahmani
Issue:
Volume 5, Issue 6, November 2017
Pages:
113-119
Received:
8 October 2017
Accepted:
20 October 2017
Published:
24 November 2017
Abstract: The ground state proton momentum distributions and elastic charge form factors for 88Sr and 89Y nuclei have been derived and studied using the Coherent Density Fluctuation Model and formulated by means of the fluctuation function (weight function) |f(x)|2 The fluctuation function has been connected to the charge density distribution of the nuclei and determined from the theory and experiment. The feature of the long-tail behavior at high momentum region of the PMD has been calculated by both the theoretical and experimental fluctuation functions. The calculated form factors F (q) of all nuclei under study are in good agreement with those of experimental data throughout all values of momentum transfer q.
Abstract: The ground state proton momentum distributions and elastic charge form factors for 88Sr and 89Y nuclei have been derived and studied using the Coherent Density Fluctuation Model and formulated by means of the fluctuation function (weight function) |f(x)|2 The fluctuation function has been connected to the charge density distribution of the nuclei a...
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Filling with the Graphene Nanoplates as a Way to Improve Properties of Epoxy-Composites for Industrial and Geophysical Machinery
Dmitro Starokadomsky,
Anatoly Ishenko,
Maria Reshetnyk
Issue:
Volume 5, Issue 6, November 2017
Pages:
120-125
Received:
11 November 2017
Accepted:
5 December 2017
Published:
3 January 2018
Abstract: It is established that the filling with graphenes increases (by 1.3-1.8 times) the strength at normal adhesion to steel. At same time, filling reduces the compressive strength and abrasion resistance and also resistance to aggressive liquids (conc. nitric acid, chloromethylene; mixture acetone-ethylacetate). The most probable reason for this may be the features of the graphene plate structure, prone to deactivation (self-rotation) of particles and therefore sensitive to the technology of hardening. Studies have shown the limited positive effects of graphene as a filler of epoxydes, although its introduction can significantly improve certain practical characteristics (adhesion, thermal and electrical conductivity).
Abstract: It is established that the filling with graphenes increases (by 1.3-1.8 times) the strength at normal adhesion to steel. At same time, filling reduces the compressive strength and abrasion resistance and also resistance to aggressive liquids (conc. nitric acid, chloromethylene; mixture acetone-ethylacetate). The most probable reason for this may be...
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