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Influence of the dispersion in the laws of continuum mechanics 连续介质力学中色散的影响
Nanodesign, Technology, and Computer Simulations Pub Date : 2006-02-23 DOI: 10.1117/12.726789
E. Prozorova
{"title":"Influence of the dispersion in the laws of continuum mechanics","authors":"E. Prozorova","doi":"10.1117/12.726789","DOIUrl":"https://doi.org/10.1117/12.726789","url":null,"abstract":"The work addresses to alternative formulation of equilibrium conditions as conditions of equilibrium angular moment for continuous mechanics. The equilibrium conditions of forces are the special case of more general conditions of equilibrium of angular moments. The modified equations are the conservation laws of density, linear moment, and energy. A new law for angular moment is suggested. One aim our analysis is to discuss the problems that can be appearing to consider the angular moment variation in an elementary volume. The theory by Bogolubov has difficulties to write the Boltzmann equation for nonhomogeneous gas. In this work influence of large gradients density, velocity or temperature on integral of collisions are investigated. Changing of Navie-Stokes equations as a function of the Boltzmann equation is determined. Usually mathematical modeling of processes in the mechanics of deformed solids is written without the angular moment variation in an elementary volume. Problem of compression of ideal hard plastic (the Prandtl problem) is considered with the angular moment.","PeriodicalId":117315,"journal":{"name":"Nanodesign, Technology, and Computer Simulations","volume":"s3-9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130252443","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Path integral representation of the evolution operator for the Dirac equation
Nanodesign, Technology, and Computer Simulations Pub Date : 2006-02-23 DOI: 10.1117/12.726706
A. Lukyanenko, I. Lukyanenko
{"title":"Path integral representation of the evolution operator for the Dirac equation","authors":"A. Lukyanenko, I. Lukyanenko","doi":"10.1117/12.726706","DOIUrl":"https://doi.org/10.1117/12.726706","url":null,"abstract":"A path integral representation of the evolution operator for the four-dimensional Dirac equation is proposed. A quadratic form of the canonical momenta regularizes the original representation of the path integral in the electron phase space. This regularization allows one to obtain a representation of the path integral over trajectories in the configuration space. This form of the path integral is useful for the formulation of perturbation theory in an external electromagnetic field.","PeriodicalId":117315,"journal":{"name":"Nanodesign, Technology, and Computer Simulations","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129921456","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Numerical modeling of cyclic strengthening and weaking of material 材料循环强化和循环弱化的数值模拟
Nanodesign, Technology, and Computer Simulations Pub Date : 2006-02-23 DOI: 10.1117/12.726762
W. Dudda
{"title":"Numerical modeling of cyclic strengthening and weaking of material","authors":"W. Dudda","doi":"10.1117/12.726762","DOIUrl":"https://doi.org/10.1117/12.726762","url":null,"abstract":"The study concerns analytical and numerical tools for description of strengthening and weakening effects of materials put under influence of cyclic mechanical loads. The paper presents formulas describing the change in material mechanical properties such as the yield point and strain hardening modulus depending on the number of load cycles and stress ratio. Numerical simulations for cases based on experimental studies presented in the existing literature were conducted. The results of numerical calculations and their comparison with the experimental data are presented in the form of stress-strain hysteresis loop graphs.","PeriodicalId":117315,"journal":{"name":"Nanodesign, Technology, and Computer Simulations","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128015562","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Differential dynamic and integral static light scattering for nondestructive testing of 3D disperse systems with nanoparticles 三维纳米颗粒分散体系无损检测的微分动态和积分静态光散射
Nanodesign, Technology, and Computer Simulations Pub Date : 2006-02-23 DOI: 10.1117/12.726758
A. G. Bezrukova, M. Lubomska, P. Magri, M. Rogalski
{"title":"Differential dynamic and integral static light scattering for nondestructive testing of 3D disperse systems with nanoparticles","authors":"A. G. Bezrukova, M. Lubomska, P. Magri, M. Rogalski","doi":"10.1117/12.726758","DOIUrl":"https://doi.org/10.1117/12.726758","url":null,"abstract":"In this contribution it is reported on the inverse optical problem for characterization of latex nanopaticle water dispersion by two types of light scattering: differential dynamic and integral static (time average). Such measurements are nondestructive, compatible and can provide useful information about the state of \"ill-defined\" three-dimensional disperse systems (3D DS) with nano- and micro-particles.","PeriodicalId":117315,"journal":{"name":"Nanodesign, Technology, and Computer Simulations","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121378577","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Heat treatments of Gd2O2S:Tb, Y2O2S:Tb phosphors Gd2O2S:Tb、Y2O2S:Tb荧光粉的热处理
Nanodesign, Technology, and Computer Simulations Pub Date : 2006-02-23 DOI: 10.1117/12.726754
Boris V. Mikhitaryan, O. Y. Manashirov, S. B. Mikhrin
{"title":"Heat treatments of Gd2O2S:Tb, Y2O2S:Tb phosphors","authors":"Boris V. Mikhitaryan, O. Y. Manashirov, S. B. Mikhrin","doi":"10.1117/12.726754","DOIUrl":"https://doi.org/10.1117/12.726754","url":null,"abstract":"It's well known, that some heat treatments improve significantly the light yield of Gd2O2S:Tb, Y202S:Tb phosphors, but processes ofthe energy transfer at excitations need further investigations. We present the new results ofthe synthesis and heat treatments optimization of oxysulfide phosphors. The heat treatments curried out at different ambient atmospheres in temperature range 200-1000°C. To measure kinetic properties of defects formations/annealing at heat treatments we measured the dependencies ofrelative defect concentrations on the duration of isothermal annealing. The investigation of bulk and surface defects in phosphors before and after heat treatments carried out at different excitation with different methods: spectra measurements with direct Tb3+ center excitation (4.9 eV UV excitation), spectra measurements with above gap excitation (X-ray; 1 kV and 10 kV electrons, 8.4 eV VUV excitation), thermo-stimulated luminescence measurements. The results of investigations allow us to increase the light yield of phosphors (20% increase in comparison with commercial samples).","PeriodicalId":117315,"journal":{"name":"Nanodesign, Technology, and Computer Simulations","volume":"137 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123390874","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Automatic sound signals quality estimation 自动声音信号质量估计
Nanodesign, Technology, and Computer Simulations Pub Date : 2006-02-23 DOI: 10.1117/12.726781
Mikhail N. Gusev, Vladimir M. Degtyarev, V. A. Smirnov, O. B. Bolotova
{"title":"Automatic sound signals quality estimation","authors":"Mikhail N. Gusev, Vladimir M. Degtyarev, V. A. Smirnov, O. B. Bolotova","doi":"10.1117/12.726781","DOIUrl":"https://doi.org/10.1117/12.726781","url":null,"abstract":"The paper describes development of a system, estimating sound signals quality, transmitted via communication channel, compressed, restored or processed. A brief review of the known methods of sound quality estimation is given together with the objective necessity of such system for modem telecommunications. The paper examines general outline and the basic components of the system - signal, synchronization and analytical components. Test signal (including statistic speech model) and sound perception models are considered. Based on the results of comparison of received analytical and subjective MOS estimations the paper makes conclusion about the adequacy of analytical estimations. The contribution also presents means of acoustic model perfection and software developed as well as different applications of the proposed system.","PeriodicalId":117315,"journal":{"name":"Nanodesign, Technology, and Computer Simulations","volume":"6597 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131065299","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Manifestation of microinhomogenous structure of doped fluorophosphate glasses in γ-induced optical spectra 掺氟磷酸盐玻璃微非均匀结构在γ诱导光谱中的表现
Nanodesign, Technology, and Computer Simulations Pub Date : 2006-02-23 DOI: 10.1117/12.726723
T. V. Bocharova, G. Karapetyan, N. Tagil'tseva, A. Vlasova
{"title":"Manifestation of microinhomogenous structure of doped fluorophosphate glasses in γ-induced optical spectra","authors":"T. V. Bocharova, G. Karapetyan, N. Tagil'tseva, A. Vlasova","doi":"10.1117/12.726723","DOIUrl":"https://doi.org/10.1117/12.726723","url":null,"abstract":"One of the main problems that should be solved to design prospective materials as fluorophosphates glasses for optical fiber amplifiers is spatial distribution of rare-earth ions in glass matrix. Doped fluorophosphate glasses 5 Ba(P03)2 95 MgCaSrBaA12F14 compositions are studied by means of γ-induced ESR and optical absorption spectra. Analysis of radiation center behavior in these glasses makes it possible to elucidate local environment composition of small concentration of RE-ions.","PeriodicalId":117315,"journal":{"name":"Nanodesign, Technology, and Computer Simulations","volume":"6597 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130610802","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Investigation of selected structural parameters in Fe95Si5 amorphous alloy during crystallization process Fe95Si5非晶合金结晶过程中结构参数选择的研究
Nanodesign, Technology, and Computer Simulations Pub Date : 2006-02-23 DOI: 10.1117/12.726768
Adam Fronczyk
{"title":"Investigation of selected structural parameters in Fe95Si5 amorphous alloy during crystallization process","authors":"Adam Fronczyk","doi":"10.1117/12.726768","DOIUrl":"https://doi.org/10.1117/12.726768","url":null,"abstract":"In this study, we report on a crystallization behavior of the Fe95Si5 metallic glasses using a differential scanning cabrimetry (DSC), and X-ray diffraction. The paper presents the results of experimental investigation of Fe95Si5 amorphous alloy, subjected to the crystallizing process by the isothermal annealing. The objective of the experiment was to determine changes in the structural parameters during crystallization process of the examined alloy. Crystalline diameter and the lattice constant of the crystallizing phase were used as parameters to evaluate structural changes in material.","PeriodicalId":117315,"journal":{"name":"Nanodesign, Technology, and Computer Simulations","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114722545","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Changes of thermal hysteresis during homogenisation process of Ni-Mn-Ga polycrystalline alloy Ni-Mn-Ga多晶合金均匀化过程中的热滞后变化
Nanodesign, Technology, and Computer Simulations Pub Date : 2006-02-23 DOI: 10.1117/12.726770
T. Breczko, M. Bramowicz
{"title":"Changes of thermal hysteresis during homogenisation process of Ni-Mn-Ga polycrystalline alloy","authors":"T. Breczko, M. Bramowicz","doi":"10.1117/12.726770","DOIUrl":"https://doi.org/10.1117/12.726770","url":null,"abstract":"In this paper we present results of the investigation of polycrystalline Ni52,2Mn21,3Ga26,5 alloy before and after homogenisation at 1173K processed for different time intervals. We investigated the influence of duration of homogenisation on kinetics of reversible martensitic transformation (RMT). In order to present changes of kinetics of RMT, thermal hysteresis was determined based on calorimetric (DSC) investigation. Our results suggested that thermal annealing at 1173K caused plastic deformation of crystal lattice in the investigated alloy.","PeriodicalId":117315,"journal":{"name":"Nanodesign, Technology, and Computer Simulations","volume":"2015 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129621650","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Motion, tunneling, and quantum revivals of wave packets into systems with distributed potential and boundary walls 具有分布势和边界壁的系统中的波包的运动、隧穿和量子恢复
Nanodesign, Technology, and Computer Simulations Pub Date : 2006-02-23 DOI: 10.1117/12.726708
A. Sanin, A. Smirnovsky, A. Bagmanov
{"title":"Motion, tunneling, and quantum revivals of wave packets into systems with distributed potential and boundary walls","authors":"A. Sanin, A. Smirnovsky, A. Bagmanov","doi":"10.1117/12.726708","DOIUrl":"https://doi.org/10.1117/12.726708","url":null,"abstract":"Quantum wave dynamics in systems with potential wells, bathers and outer impenetrable walls has been studied using solutions of time-dependent Schrodinger equation. Numerical integration of Schrodinger equation, calculation of dynamical variables and its average values, Fourier-spectra were carried out for different initial conditions and different relations between wave packet energy and bather height. In non-symmetric wells the oscillations of wave packets are accompanied by multistep discrete tunneling of probability fluid from well through barrier. In double well potential (symmetric wells) the temporal scales of oscillations and tunneling were investigated in details. Influence of additional time-dependent potential on quantum wave packet dynamics in above listed systems is also discussed.","PeriodicalId":117315,"journal":{"name":"Nanodesign, Technology, and Computer Simulations","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128366116","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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