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CES Transactions on Electrical Machines and Systems 2023年第4期7卷 320-329页

作者： g.Kovács ganz Electric Works 1095 BudapestHungary

The magnetic field generated in the air gap of the cage asynchronous machine and the harmonics of the magnetomotive forces creating that magnetic field, as well as the related differential leakage, attenuation, asynchronous parasitic torques have been discussed in great detail in the literature, but always separately, for a long time. However, systematization of the phenomenon still awaits. Therefore, it is worth summarizing the completeness of the phenomena in a single study – with a new approach at the same time-in order to reveal the relationships between them. The role of rotor slot number is emphasized much more than before. An existing, commonly used, but still impractical basic figure has been modified to more clearly demonstrate the response of the rotor for the harmonics of the stator. The need to treat differential leakage, asynchronous parasitic torques and attenuation together will be demonstrated: new formula for asynchronous parasitic torque is derived;the long-used characteristic curves for differential leakage and attenuation used separately so far was merged into one, correct curve in order to provide a correct design guide for the engineers.

关键词： Asynchronous parasitic torque Attenuation Differential leakage Squirrel cage induction motor Winding harmonics

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Proton-neutron symplectic model description of ^(20)Ne

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Chinese Physics C 2022年第4期46卷 141-149页

作者： H.g.ganev Joint Institute for Nuclear Research DubnaRussia

A microscopic description of the low-lying positive-parity rotational bands in ^(20)Ne is given within the framework of the symplectic-based proton-neutron shell-model approach provided by the proton-neutron symplectic model(PNSM).For this purpose,a model Hamiltonian is *** includes an algebraic interaction lying in the enveloping algebra of the Sp(12,R)dynamical group of the PNSM,which introduces both horizontal and vertical mixings of different SU(3)irreducible representations within the Sp(12,R)irreducible collective space of ^(20)Ne.A good overall description is obtained for the excitation energies of the ground and first two excited β bands,including the ground state intraband B(E2)quadrupole collectivity and the known interband B(E2)transition probabilities between the low-lying collective states,without utilizing an effective charge.

关键词： proton-neutron symplectic model shell-model states collective states in^(20)Ne

Matrix elements in the SU(1,1)⊗SO(6)limit of the proton-neutron symplectic model

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Chinese Physics C 2021年第11期45卷 101-114页

作者： H.g.ganev Joint Institute for Nuclear Research DubnaRussia

The matrix elements along the reduction chain Sp(12,R)⊃SU(1,1)⊗SO(6)⊃U(1)⊗SUpn(3)⊗SO(2)⊃SO(3)of the proton-neutron symplectic model(PNSM)are *** analytical expressions are obtained for the matrix elements of the basic building blocks of the PNSM and the Sp(12,R)symplectic generators,allowing the computation of matrix elements of other physical operators as *** computational technique developed in the present study generally provides us with the required algebraic tool for performing realistic symplectic-based shell-model calculations of nuclear collective *** two simple examples,we illustrate the application of the theory.

关键词： matrix elements proton-neutron symplectic model SU(1 1)⊗SO(6)limit Sp(12 R)dynamical algebra

Evaluation of Codebook Design Using SCMA Scheme Based on A_(n) and D_(n) Lattices

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Intelligent Automation & Soft Computing 2023年第3期35卷 3037-3048页

作者： g.Rajamanickam g.Ravi Department of ECE Knowledge Institute of TechnologySalem637504India Department of ECE Sona College of TechnologySalem636001India

The sparse code multiple access(SCMA)scheme is a Non-Orthogonal Multiple Access(NOMA)type of scheme that is used to handle the uplink com-ponent of mobile communication in the current generation.A need of the 5g mobile network is the ability to handle more *** accommodate this,the SCMA allows each user to deploy a variety of sub-carrier broadcasts,and several consumers may contribute to the same frequency using superposition *** SCMA approach,together with codebook design for each user,is used to improve channel efﬁciency through better management of the available ***-ever,developing a codebook with a greater number of value sets is still another *** enhanced techniques of encoding and decoding for 5g networks,mapping the multidimensional constellations in the SCMA system plays a signif-icant role in improving the system performance and enhancing the overall system *** creation of a codebook utilizing the SCMA approach in con-junction with the lattice theory is suggested in this *** prototype is shaped using a popular lattice,such as A n and D n,as the ***,from the primary lattice constellation,the multidimensional complex mother constellation with the most noticeable variance in power is *** lattice-based cod-ing is generated by combining the codebooks with the mother constellation,and the codes in the matrices are mapped by rotating the constellations in this *** suggested technique,in conjunction with the investigation of novel SCMA codebook sets,provides improved performance in terms of Bit Error Rate(BER)and complexity with regard to Signal to Noise Ratio(SNR).Finally,the bit error rate is reduced for various SNRs during transmission in the channel.

关键词： 5g NOMA SCMA lattice coding codebook design bit error rate

Myelinosome organelles in pathological retinas: ubiquitous presence and dual role in ocular proteostasis maintenance

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Neural Regeneration Research 2023年第5期18卷 1009-1016页

作者： Marina g.Yefimova Sechenov Institute of Evolutionary Physiology and Biochemistry Russian Academy of SciencesSt-PetersburgRussia Laboratoire STIM CNRS ERL 7003 Universitéde PoitiersPoitiersFrance

The timely and efficient elimination of aberrant proteins and damaged organelles, formed in response to various genetic and environmental stressors, is a vital need for all cells of the body. Recent lines of evidence point out several non-classical strategies employed by ocular tissues to cope with aberrant constituents generated in the retina and in the retinal pigmented epithelium cells exposed to various stressors. Along with conventional strategies relying upon the intracellular degradation of aberrant constituents through ubiquitin-proteasome and/or lysosome-dependent autophagy proteolysis, two non-conventional mechanisms also contribute to proteostasis maintenance in ocular tissues. An exosome-mediated clearing and a myelinosome-driven secretion mechanism do not require intracellular degradation but provide the export of aberrant constituents and “waste proteins” outside of the cells. The current review is centered on the non-degradative myelinosome-driven secretion mechanism, which operates in the retina of transgenic Huntington’s disease R6/1 model mice. Myelinosome-driven secretion is supported by rare organelles myelinosomes that are detected not only in degenerative Huntington’s disease R6/1 retina but also in various pathological states of the retina and of the retinal pigmented epithelium. The intra-retinal traffic and inter-cellular exchange of myelinosomes was discussed in the context of a dual role of the myelinosome-driven secretion mechanism for proteostasis maintenance in different ocular compartments. Special focus was made on the interplay between degradative and non-degradative strategies in ocular pathophysiology, to delineate potential therapeutic approaches to counteract several vision diseases.

关键词： autophagy Huntington’s disease Müller cells myelinosome-driven secretion myelinosomes ocular pathophysiology proteostasis retina retinal pigmented epithelium ubiquitin-proteasome system

Temperature Controlled Lateral Pattern Formation in Confined Polymer Thin Films

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Chemical Research in Chinese Universities 2004年第4期20卷 511-515页

作者： David g. Bucknall Department of Materials University of Oxford

The thermal induced topography change in a model system consisting of a polymer film on a Si substrate capped by a thin metal layer has been studied by using AFM. Regular lateral patterns over large areas were observed on the surface when the system was heated to a sufficiently high temperature. 2D-FFT analysis to the AFM images indicates that the patterns are isotropic and have well defined periodicities. The periodicities of the characteristic patterns are found to depend strongly on the annealing temperature. The study of the kinetics of the formation reveals that such a topography forms almost instantaneously once the critical temperature is reached. It is suggested that this wave-like surface morphology is driven by the thermal expansion coefficient mismatch of the different layers. This method for generating regular wave-like patterns could be used as a general method for patterning various organic materials into micro/nanostructures.

关键词： Thermal induce Topography change Polymer thin film AFM

Importance of heavy quark longitudinal structure function measurements at future circular collider energies

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Chinese Physics C 2021年第6期45卷 56-65页

作者： g.R.Boroun Physics Department Razi UniversityKermanshah 67149Ira

In this article,we consider the ratio of structure functions for heavy quark pair production at low values *** importance of this ratio for charm and beauty pair production is examined according to the Hadron Electron Ring Accelerator(HERA)*** behavior of these ratios is considered due to the hard pomeron behavior of the gluon distribution *** results are in good agreement with the HERA *** this data to the range of new energies underscores the importance of these measurements for heavy *** ratio of charm and beauty structure functions at the proposed Large Hadron electron Collider(LHeC)is considered as a function of invariant center-of-mass *** top pair production this ratio is extracted with known kinematics of the LHeC and Future Circular Collider electron-hadron(FCC-eh)*** of the results obtained for the ratio of top structure functions in LHeC and FCC-eh are proportional to the specified inelasticity range.

关键词： future circular colliders heavy quarks longitudinal structure function

On the pressure and stress singularities induced by steady flows of a pair of nonmiscible,incompressible,viscous fluids in contact with a wall

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Acta Mechanica Sinica 2010年第5期26卷 669-673页

作者： g.B.Sinclair Department of Mechanical Engineering Louisiana State University

Design for structural integrity requires an appreciation of where stress singularities can occur in structural configurations. While there is a rich literature devoted to the identification of such singular behavior in solid mechanics, only of late has there been much in the way of corresponding identifications of flow-induced stress singularities in fluid mechanics. These recent asymptotic identifications are for a single incompressible viscous fluid： Here the asymptotic approach is extended to apply to a configuration entailing two such fluids, For this configuration, various specifications leading to power or log singularities are determined. These results demonstrate that flow-induced stress singularities can occur in a structural container at a location where no singularities are identified within solid mechanics alone.

关键词： Incompressible viscous fluids - Navier-Stokes equations Fluid-structure interactions Stress singularities

Ichnofabric analysis of bathyal chalks:the Miocene Inglis Formation of the Andaman and Nicobar Islands,India

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Journal of Palaeogeography 2021年第4期10卷 494-508页

作者： Bhawanisingh g.Desai School of Petroleum Technology Pandit Deendayal Energy UniversityGandhinagarGujaratIndia

In the Bay of Bengal,the Andaman and Nicobar Islands represent part of the Burma-Sunda-Java subduction *** Islands are composed of sediments ranging in age from Jurassic to Recent,represented by ophiolites,flysch sediments,along with deep marine sediments scraped off from the subducting *** stratigraphic succession that overlies meta-sedimentary and ophiolite suites consists of turbidite and non-turbidite sequences,along with thick-bedded nannofossil *** present study describes ichnofabrics of chalks from the Inglis Formation(Early to Middle Miocene).These chalks are highly to moderately bioturbated and comprise several levels of ferruginised layers as weak discontinuity *** studied section shows the recurring occurrence of ichnotaxa belonging to Asterosoma,Chondrites,Cladichnus,Ophiomorpha,Palaeophycus,Planolites,Taenidium,Thalassinoides,and *** are represented by Bioturbation indices varying between BI-2 to BI-5,represented by(a)light coloured trace fossils in dark sediment(LID ichnofabric)and(b)dark coloured trace fossils in light sediment(DIL ichnofabric).Ichnofabric analysis suggests multiple colonization,complex tiering,and multilayer *** LID ichnofabric exposed at Kalapathar reveals three tiers,a diverse shallow tier and a moderately low diverse middle and deep *** the Lacam Point Section,in contrast,the LID ichnofabric is represented by condensation of the tiers and the absence of shallow *** DIL ichnofabric at the Kalapathar Section seems to be more expanded and is represented by four tiers with extensive *** analysis supports deposition of the chalk sediments in a lower bathyal paleoenvironment and suggests that organic matter,pore water,and bottom-water oxygenation were the main controlling ***,the ichnofabric analysis of the EarlyMiddle Miocene Inglis Formation gives first-hand information regarding the poorly known chalk facies of the Andaman and Nicobar Islan

关键词： Ichnofabric Nannofossil ooze Chalk Bathyal Bay of Bengal Miocene

Determination of relationships between thermal conductivity and material properties of rocks

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Journal of University of Science and Technology Beijing 2004年第4期11卷 297-301页

作者： Kazim grgülü Mining Engineering Dept. Cumhuriyet University58140-SivasTurkeynergy transfer between the adjacent parts of rocks in underground mines is widely influenced by the thermal conductivity of rocks. The relationships between the thermal conductivity and some material properties of rocks such as the uniaxial compressive strength unit mass tensile strength cohesion Young's modulus point load strength Schmidt rebound hardness Shore scleroscope hardness and toughness strength were investigated. The statistical analysis of the data obtained in laboratory tests shows that the thermal conductivity increases with increasing the uniaxial compressive strength unit mass tensile strength cohesion Young's modulus point load strength Schmidt rebound hardness and Shore scleroscope hardness and decreases with increasing the toughness strength.

Energy transfer between the adjacent parts of rocks in underground mines is widely influenced by the thermal conductivity of rocks. The relationships between the thermal conductivity and some material properties of rocks such as the uniaxial compressive strength, unit mass, tensile strength, cohesion, Young’s modulus, point load strength, Schmidt rebound hardness, Shore scleroscope hardness and toughness strength were investigated. The statistical analysis of the data obtained in laboratory tests shows that the thermal conductivity increases with increasing the uniaxial compressive strength, unit mass, tensile strength, cohesion, Young’s modulus, point load strength, Schmidt rebound hardness and Shore scleroscope hardness, and decreases with increasing the toughness strength.

关键词： thermal conductivity material properties underground mines