Guangzhou Panyu Polytechnic

Shiqiao, China

Guangzhou Panyu Polytechnic

Shiqiao, China
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Zhang Y.,GuangZhou Panyu Polytechnic
Agro Food Industry Hi-Tech | Year: 2017

The consulting service of community public welfare is related to the national security and the interests of the community residents, and it has the positive significance to maintain social stability. Since the We-Media era has the features of low threshold in information dissemination, having many ways and having high speed and others, which leads to that the community service in China is facing severe challenges, but also has more opportunities: citizens can play the role of disseminator and initiator, the propagation space can be more free and the information sharing can be more convenient. As a result, this paper carries on the thorough research to the consulting service of community public welfare in the We-Media era, so as to innovate the service mode of the community and make it conform to the development trend of the media age and promote the social progress.


The emergence of the computer technology has led to the great changes of learning and life styles of people, and it also has brought certain impacts and opportunities for the ideological and political education in colleges and universities, so the traditional ideological and political education has been unable to meet the needs of students' ideological and political education. Through studying the network ideological and political education and the traditional ideological and political education, the conclusion that the network environment makes the education mode become more open and diversified was obtained in this paper. Through the study, it can be found that college students can't fully identify the massive network information, so it requires the universities' ideological and political education workers to guide them, so as to improve the students' autonomous abilities, critical abilities, and creative abilities, and establish the correct world view, value view, and philosophy.


Kuang W.,Guangzhou Panyu Polytechnic | Pang X.,Guangdong University of Technology
Advances in Information Sciences and Service Sciences | Year: 2012

Measure principle of U type transit-time ultrasonic flowmeter is introduced, flux formula and flow rate correction factor are calculated. Flow rate distribution laws on different occasions (laminar flow, turbulent flow and elbow flow) are derivate by theory formula. At last, flow characteristic is simulated based on Fluent software, distributing laws of flow velocity and pressure are studied. Along the ultrasound propagation path, affects on the measurement accuracy of pipe structure (reflection column size, distance between two reflection columns, reflection column shape and pipe diameter) are discussed. The simulation results are consistent with the practice, and they are helpful for flowmeter structure optimization.


Zhang L.,Guangzhou Panyu Polytechnic
Physica Status Solidi (B) Basic Research | Year: 2011

The polar optical phonon states of four types of phonon modes including the interface optical (IO) modes, the propagating (PR) modes, the quasi-confined (QC) phonon modes in well-layer material (QCw), and the QC phonon modes in barrier-layer material (QCB) in a wurtzite GaN/AlxGa1-xN superlattice (SLs) are investigated within the dielectric continuum model framework. The analytical phonon states of the four types of modes and their dispersive equations in the wurtzite GaN/AlxGa1-xN SL structures are obtained. Numerical calculations on the dispersive spectra of phonon modes and the quantum size effect are performed for a wurtzite GaN/Al0.15Ga0.85N SL. Results reveal that dispersive curves of phonon modes in SLs form a series of frequency bands. The behaviors of QCw modes reducing to PR and IO modes are observed clearly. With the increase of well-layer GaN width d1 of the SLs, the dispersion of the QCB modes become weaker and weaker, and their frequency bands become narrower and narrower. But the PR, IO, and the QCw phonon modes become more dispersive, and the frequency bands of these modes become wider and wider as d1 increases. The present theoretical scheme and numerical results are quite useful for analyzing the dispersive spectra of full phonon modes and their polaronic effect in wurtzite GaN/AlGaN SL structures. © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.


Guan X.Q.,Guangzhou Panyu Polytechnic
Applied Mechanics and Materials | Year: 2014

Subjectivity education embodies the basic requirements of ideological and political education and has a profound meaning to improve ideological and political education effectiveness. Through practical experience in the field of ideological and political education, research experience with the actual investigation, and a combination of theory with practice, the author researches on coupling factor of subjectivity ideological and political education and the actual situation, with the use of factor principal component analysis to establish countermeasures model and makes in-depth study and optimization of the ideological and political education teaching science concepts and strategies. © (2014) Trans Tech Publications, Switzerland.


Changhui C.,Guangzhou Panyu Polytechnic
RISTI - Revista Iberica de Sistemas e Tecnologias de Informacao | Year: 2016

With the emergence of a large number of multimedia applications on the Internet, the higher requirements for the quality of network services are put forward. At present, most of the existing Quality of Service (QoS ) flow control methods have low utilization rate of network resources, poor reliability, coarse grain size, difficult implementation and poor scalability. Therefore, a QoS flow control method based on the OpenFlow technology is proposed in this paper. The separation new ideas of control layer and data layer that proposed by the software defined network (SDN) are referenced on the basis of the brief introduction of QoS, OpenFlow technology and Open vswitch, and the adaptive multi constrained QoS routing technology is used to design the QoS flow control method based on the OpenFlow technology. The experimental results show that this method can improve the flexibility and reliability of QoS control, and realize the efficient utilization of network resources and the fine granularity of traffic flow control. The QoS flow control method based on OpenFlow fully plays the advantage of SDN network, and realizes the reliable transmission and fine granularity control of QoS flow, so as to achieve the efficient utilization of network resources.


Zhang L.,Guangzhou Panyu Polytechnic
Physica Status Solidi (B) Basic Research | Year: 2012

By employing the two-parameter variational approach, the binding energies of bound polarons in a quasi-one-dimensional wurtzite nanowire (NW) are investigated. Two types of polar optical phonon modes, i.e., the interface optical (IO) and quasi-confined (QC) phonon modes of wurtzite NWs are taken in account. The results reveal that the phonon contribution to binding energy of bound polaron in GaN NWs reaches ∼370meV. The quite large contribution of phonon modes to the total binding energy is mainly ascribed to the very strong electron-phonon coupling constant in GaN materials. Moreover, the IO modes plays more important role to the binding energies of bound polaron as the NW radius is small, while the QC modes dominates as the NW radius is relatively large. The calculated results of impurity binding energy are quite consistent with the recent experimental measurement. The numerical results also show that the two-parameter variational approach is necessary and suitable for the description of impurity states in wurtzite GaN NW structures. © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.


Zhang L.,Guangzhou Panyu Polytechnic
Physica Status Solidi (B) Basic Research | Year: 2010

Based on the macroscopic dielectric continuum model, the interface-optical-propagating (IO-PR) mixing phonon modes of a quasi-zero-dimensional wurtzite cylindrical quantum dot (QD) structure are derived and studied. The analytical phonon states of IO-PR mixing modes are given. It is found that there are two types of IO-PR mixing phonon modes, i.e., the ρ-IO/z-PR mixing modes and the z-IO/ρ-PR mixing modes, existing in wurtzite QDs. Each IO-PR mixing mode also has symmetrical and antisymmetrical forms. Via a standard procedure of field quantization, the Fröhlich Hamiltonians of the electron-(IO-PR) mixing phonon interaction are obtained. The orthogonal relations of polarization eigenvectors for these IO-PR mixing modes are also displayed. Numerical calculations for a wurtzite GaN cylindrical QD are focused on the quantum size effect and the dielectric effect on the dispersive properties of IO-PR mixing modes. The results reveal that both the radial-direction size and the axial-direction size as well as the dielectric matrix have great influence on the dispersive frequencies of the IO-PR mixing phonon modes. The limiting features of dispersive curves of these phonon modes are discussed in depth. The phonon modes' "reducing" behavior of wurtzite quantum confined structures has been found in the systems. Moreover, the behaviors that the IO-PR mixing phonon modes in wurtzite QDs reduce to the IO modes and the PR modes in wurtzite quantum well and quantum wire systems are analyzed deeply from the viewpoints of both physics and mathematics. These results show that the present theories of polar mixing phonon modes in wurtzite cylindrical QDs are consistent with the phonon mode theories in wurtzite quantum wells and quantum wire systems. © 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.


Within the framework of the macroscopic dielectric continuum model and Loudon's uniaxial crystal model, the phonon modes of a wurtzite/zinc-blende one-dimensional (1D) cylindrical nanowire (NW) are derived and studied. The analytical phonon states of phonon modes are given. It is found that there exist two types of polar phonon modes, i.e. interface optical (IO) phonon modes and the quasi-confined (QC) phonon modes existing in 1D wurtzite/zinc-blende NWs. Via the standard procedure of field quantization, the Fröhlich electron-phonon interaction Hamiltonians are obtained. Numerical calculations of dispersive behavior of these phonon modes on a wurtzite/zinc-blende ZnO/MgO NW are performed. The frequency ranges of the IO and QC phonon modes of the ZnO/MgO NWs are analyzed and discussed. It is found that the IO modes only exist in one frequency range, while QC modes may appear in three frequency ranges. The dispersive properties of the IO and QC modes on the free wave-number k z and the azimuthal quantum number m are discussed. The analytical Hamiltonians of electron-phonon interaction obtained here are quite useful for further investigating phonon influence on optoelectronics properties of wurtzite/zinc-blende 1D NW structures. © 2011 Chinese Physical Society and IOP Publishing Ltd.


Zhang L.,Guangzhou Panyu Polytechnic
Superlattices and Microstructures | Year: 2011

Based on the macroscopic dielectric continuum model and Loudon's uniaxial crystal model, the polar optical phonon modes of a quasi-0-dimensional (Q0D) wurtzite spherical nanocrystal embedded in zinc-blende dielectric matrix are derived and studied. It is found that there are two types of polar phonon modes, i.e. interface optical (IO) phonon modes and the quasi-confined (QC) phonon modes coexisting in Q0D wurtzite ZnO nanocrystal embedded in zinc-blende MgO matrix. Via solving Laplace equations under spheroidal and spherical coordinates, the unified and analytical phonon states and dispersive equations of IO and QC modes are derived. Numerical calculations on a wurtzite/zinc-blende ZnO/MgO nanocrystal are performed. The frequency ranges of the IO and QC phonon modes of the ZnO/MgO nanocrystals are analyzed and discussed. It is found that the IO modes only exist in one frequency range, while QC modes may appear in three frequency ranges. The dispersive frequencies of IO and QC modes are the discrete functions of orbital quantum numbers l and azimuthal quantum numbers m. Moreover, a pair of given l and m corresponds to one IO mode, but to more than one branches of QC. The analytical phonon states and dispersive equations obtained here are quite useful for further investigating Raman spectra of phonons and other relative properties of wurtzite/zinc-blende Q0D nanocrystal structures. © 2011 Published by Elsevier Ltd.

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