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Search Results: 1 - 10 of 51191 matches for " Peng Zhou "
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The Impact of Institution Factors on Commercial Banks’ Risk in China  [PDF]
Peng Zhou
Journal of Financial Risk Management (JFRM) , 2018, DOI: 10.4236/jfrm.2018.72011
Abstract: In this paper, the institutional environment is included in the study of the risk of commercial banks, and the impact mechanism of the risk of commercial banks under the background of system reform is discussed. This paper constructs a theoretical model of institutional factors on the risk of commercial banks, and discusses the possibility of the impact of the institutional environment on the bank risk, and constructs a non-balanced panel regression model by selecting the variables that reflect the unsystematic risk and systemic risk of the bank, and carries on the empirical analysis.
Workflow Mining of More Perspectives of Workflow  [PDF]
Peng Liu, Bosheng Zhou
Journal of Software Engineering and Applications (JSEA) , 2008, DOI: 10.4236/jsea.2008.11012
Abstract: The goal of workflow mining is to obtain objective and valuable information from event logs .The research of workflow mining is of great significance for deploying new business process as well as analyzing and improving the already deployed ones. Many information systems log event data about executed tasks. Workflow mining is concerned with the derivation of a graphical process model out of this data. Currently, workflow mining research is narrowly focused on the rediscovery of control flow models. In this paper, we present workflow mining of more perspectives of workflow to broaden the scope of workflow mining. The mining model is described with GBMS’s VPML and we present the entire model’s workflow mining with the GBMS’s VPML.
Implementation of Optimal Pacing Scheme in Xinjiang's Oil and Gas Pipeline Leak Monitoring Network
Peng Zhou
Journal of Networks , 2011, DOI: 10.4304/jnw.6.1.54-61
Abstract: Flow against Xingjian’s oil and gas pipeline leakage and the pipe network sudden burst pipe to pipeline leakage flow for the application objects, Optimal pacing scheme is designed in pipeline leak monitoring. Based on the property of Markov chain for network data, a new estimator with particle filter is proposed for congestion control in this paper. In the context of a reconfigurable transport protocol framework, we propose a QoS aware Transport Protocol (QSTP), specifically designed to operate over QoS (Quality of Service) enabled networks with bandwidth guarantee. The proposed scheme can adaptively adjust the network rate in real -time, so that it can efficiently avoid the traffic congestion. It proposes a Link Layer Adaptive Pacing (LLAP) scheme that adaptively controls the offered load into the network. The algorithms actively probe the underlay network and compute virtual multicast trees by dynamically selecting the least loaded available paths on the overlay network. The low computational complexity of the proposed algorithms leads to time and resource saving, as shown through extensive experiments. The Simulation results show that Network congestion avoidance strategy with optimal pacing scheme can efficiently improve the bandwidth utilization, Transmission Control Protocol (TCP) friendliness and reduce the packet drop rate in Pipeline Flux Leak Monitoring networks. Flood flow identified by the National Centre for testing: discussion group first proposed the use of particle filters to solve the new model can estimate the network congestion control problem. The results are sound, stable performance, efficiency 29%. Adaptive algorithm using the model proposed optimization scheme, to achieve accurate positioning of the leak, 0.05
Cavity implementation of quantum interference in a $Λ$-type atom
Peng Zhou
Physics , 2000, DOI: 10.1103/PhysRevA.63.023810
Abstract: A scheme for engineering quantum interference in a $\Lambda$-type atom coupled to a frequency-tunable, single-mode cavity field with a pre-selected polarization at finite temperature is proposed. Interference-assisted population trapping, population inversions and probe gain at one sideband of the Autler-Townes spectrum are predicted for certain cavity resonant frequencies.
Line narrowing via cavity-induced quantum interference in a $Ξ$-type atom
Peng Zhou
Physics , 2000, DOI: 10.1016/S0030-4018(00)00627-1
Abstract: We show that cavity-induced interference may result in spectral line narrowing in the absorption spectrum of a $\Xi$-type atom coupled to a single-mode, frequency-tunable cavity field with a pre-selected polarization at finite temperature.
Analysis on Irreversible Processes using the Phase-Field Variational Approach with the Entropy or Energy Functional
Peng Zhou
Physics , 2014,
Abstract: The variational approach usually used in phase field models (PFVA) is applied here to analyse complex irreversible processes such as thermoelectric (TE) effects and thermally driven mass transport (TDMT). Complex irreversible processes arise from the coupling effects between simple irreversible processes. Each simple irreversible process is assiciated with an entropy or energy density function. During complex irreversible processes with multiple fields present, this entropy or energy density function is assumed to be dependent on all independent field variables. Using the total entropy functionals, the TE effects and TDMT are analysed and important kinetic coefficients such as the Seebeck coefficient and the heat of transport are determined with straightforward physical contents. Using the total energy functionals, the linear irreversible processes are analysed with the Onsager approach and the nonlinear irreversible processes with PFVA. It is found both the Onsager's relations and the fluxes defined using PFVA guarantee the satisfaction of the first law of thermodynamics during the process of conversion of energies. To analyze the diffusion process under the influence of elasticity, PFVA is also modified to incorporate the reversible evolution of elastic fields. It is shown energies are conserved via both the irreversible diffusion process and the reversible evolution of the elastic fields. Finally, PFVA is generalized to study nonequilibrium thermodynamics using an extra kinetic contribution to the entropy density function. The analyses can be extended to a nonequilibrium thermodynamic system with multiple physical fields present. Thus, it is believed PFVA has the potential of not only significantly advancing our understanding of the thermodynamics of irreversible processes, but also making thermodynamics as a discipline and the study of it truly dynamic.
On the Coupling Effects between Elastic and Electromagnetic Fields from the Perspective of Conservation of Energy
Peng Zhou
Physics , 2015,
Abstract: In a natural system, coupling effects among different physical fields substantially reflect the conversion of energy from one form to another. According to the law of conservation of energy (LCE), the loss of energy in one field must equal to the gain of energy in another field. In this paper, this LCE is applied to analyze the reversible processes coupled between elastic and electromagnetic fields. Here, it is called the energy formulation. For simple physical processes such as mechanical movement, diffusion and electrodynamic process, it is shown their governing or constitutive equations all satisfy the LCE. Then, analysis is extended to coupling effects. First, it is found for the linear direct and converse piezoelectric and piezomagnetic effects, their constitutive equations guarantee energy is conserved during the conversion of energies. Second, analyses found for the generalized Villari effects, the electromagnetic energy can be treated as an extra term in the generalized elastic energy. Third, for electrostriction and magnetostriction. It is argued both effects are induced by the Maxwell stress. Their energy is purely electromagnetic, thus both have no converse effects. During these processes, energy can be converted in three ways, i.e., via nonpotential forces, cross dependence of energy terms and directly via the interaction of ions and electrons. In the end, general coupling processes which involve elastic, electromagnetic fields and diffusion are also analyzed. The energy formulation, when combined with the phase-field variational approach, has the potential of being developed into a general approach to analyze coupling effects between reversible and irreversible processes. The advantage of the energy formulation is that it facilitates the discussion of the conversion of energies and provides more physical insights into their mechanisms.
Dividend Payments with a Hybrid Strategy in the Compound Poisson Risk Model  [PDF]
Peng Li, Chuancun Yin, Ming Zhou
Applied Mathematics (AM) , 2014, DOI: 10.4236/am.2014.513187
Abstract: In this paper, a hybrid dividend strategy in the compound Poisson risk model is considered. In the absence of dividends, the surplus of an insurance company is modelled by a compound Poisson process. Dividends are paid at a constant rate whenever the modified surplus is in a interval; the premium income no longer goes into the surplus but is paid out as dividends whenever the modified surplus exceeds the upper bound of the interval, otherwise no dividends are paid. Integro-differential equations with boundary conditions satisfied by the expected total discounted dividends until ruin are derived; for example, closed-form solutions are given when claims are exponentially distributed. Accordingly, the moments and moment-generating functions of total discounted dividends until ruin are considered. Finally, the Gerber-Shiu function and Laplace transform of the ruin time are discussed.
A Liability Division Method for Harmonic Pollution Based on Line-Transferred Power Components  [PDF]
Jianchun Peng, Jun Zhou, Hui Jiang
Journal of Power and Energy Engineering (JPEE) , 2015, DOI: 10.4236/jpee.2015.34035
Abstract:

The existing liability division methods for harmonic pollution are either inexplicit or incomplete in physical meaning. To compensate these defects, two new methods are proposed based on line-transferred power components in this paper. At first, all harmonic sources are represented by ideal equivalent current source, line current components and bus voltage components of a source are determined by stimulation of this source with all other sources disabled. Then, the line-trans- ferred power component owing to a source under all sources action together is determined by the theory of line-transferred power components, and called source’s line-transferred power component. At last, the liability of a source for line-end harmonic pollution is divided by two methods: the ration of the source’s line-transferred active power component to the total line-transferred power, and the ration of projection of the source’s line-transferred complex power component to absolute value of the total line-transferred complex power. These two methods are taken into account not only harmonic voltage but also harmonic current in the liability division. Simulation results show that the proposed liability division method based on active power component is the most effective and ideal one.

Literature Review of the Study of Carbon Emission Rights  [PDF]
Huan Peng, Rui Jiang, Chaobo Zhou
Low Carbon Economy (LCE) , 2017, DOI: 10.4236/lce.2017.84011
Abstract: The importance of green development, namely environment-friendly development is recognized world wild today. As integral parts of green development, carbon finance and carbon trading are expected to have huge market potential, which justifies the academic significance of a literature study in this area. The study of trading of the carbon emission rights mainly focuses on the following three aspects: the classification of carbon emission rights, the influencing factors of carbon emission rights and the price features of carbon emission rights.
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