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In a multi-energy microgrid system, meteorology factors can not only affect output of renewable resources, but also affect cooling and heating demand. Considering relationship of meteorology factors (solar insolation, wind speed, outdoor temperature) and cooling, heating, electricity demand of users in a multi-energy microgrid system, this paper proposes a model which can describe relationship between...
During package manufacturing process, open defects of power bumps may cause insufficient power supply and degrade the power network yield. This work presents a redundant power bump insertion method to ensure power integrity by considering the power bump yields. The proposed method can efficiently assign redundant bumps by accurately estimating the location of worst load yield and minimizing the amounts...
This paper proposes a new nonlinear time-varying transverse-torsional coupled model for a compound planetary gear sets. In this model, the motion dimensionless differential equations of the gear system are established based on Lagrange equation and the equations are solved, from which the result of the nonlinear dynamic response is obtained. The influences of excitation frequency, damping coefficient...
At present, mixed-revenue about the combination with subscription fee revenue and advertising revenue is the main mode of revenue for online content providers. How to balance the two aspects of revenue to get the optimal revenue is the focus of this study. This article considers consumers' price sensitive level and advertisement sensitive level. Based on these concepts, we build a more realtistic...
Arch is a typical complex structure comparing with beam and plate in bridge system. This paper investigates the damage characteristic combining the crack location with the crack intensity in arch. Initially, the first four displacement modes of intact and different damaged arch are simulated and the displacement mode changes are obtained. Next, the wavelet transformation is applied to the displacement...
Different shelf has different promotion effect for retail merchandise. High effect shelves are important and sparse resource for retailer. This paper developed a genetic algorithm used for dynamic adjusting product assortment of high effect shelves in retailing setting. A transaction simulation module was designed, which is based on the forecast of future demand intensity. The fitness function value...
The gear mesh nonlinear characteristic is an important factor in planetary gearbox nonlinear study. However the gear meshing stiffness in many research papers is often calculated with formulas from handbooks. This kind of method is not reliable and accurate enough in the planetary gear box nonlinear characteristic study especially in the high speed transmission. The vibration and noise is becoming...
Nonlinear model of switching power electronic converter using black-box identification method is presented in the paper. The duty cycle and the output voltage are chosen, respectively, as the input and the output of the model. A nonlinear Hammerstein-type mathematical model is considered in order to cope with the well-known limitations of the more common small-signal models. Simulation and experimental...
Knowledge of customer reservation price aids manager in implementing many marketing strategies such as dynamic pricing, bundling sales, and target promotion etc. This paper investigated how cognition factors affected different customer segment's reservation price distribution. Utility of information products usually can not be quantitatively measured like that of physical products, and contrarily,...
Information technology has given e-retailers new capability of learning demand in real time. This paper investigates how to integrate this real time learning technology with Q-learning algorithm for the optimization of dynamic pricing in e-retailing setting. Especially, this paper studies the optimal dynamic pricing problem for seasonal and style products in e-retailing setting, and validate our approach...
In order to analyze the quantified relationship between network time-delay and generators extra power output in NCS (networked control system), a NCS quantizer was designed by researching DTC-SVPWM (direct torque control-space vector pulse width modulation) of PMSM (permanent magnet synchronous motor) on a railway ferry. The paper deduced time delay-power association equation which was induced by...
In this paper, we considered a dynamic pricing problem for selling a given stock of perishable items during a finite sale season. We developed a partially observed Markov decision process model to study this problem. In particularly, belief states were adopted to deal with the uncertainty of demand. A Q-learning approach was designed to solve the problem of obtaining optimal dynamic pricing policy,...
This paper is aimed to solve the multi-facility location problems of distribution centers by multi-objective decision method. After analyzing the requirements and characteristics of distribution time, it put forward a multi-facility location model in which the distribution cost was taken as decision objective and the distribution time was changed to a group of constrains. It designed a bi-step heuristics...
A multi-agent median computerized adaptive testing (CAT) system is put forward, which is based on the three-parameter logistic model (3PLM) of item response theory (IRT) and a multi-agent item pool. The multi-agent item pool is proposed to help the non-professionals system choose valuable items interactively and conveniently . Aiming at the problems in the ability estimate of multi-agent adaptive...
This paper analyzed the mathematical model of permanent magnet synchronous motor (PMSM), which is used as the propulsion motor in ship electric propulsion systems. Aiming at the problems of bang-bang direct torque control (DTC) applied to PMSM, such as the singularity of basic voltage space vectors available for selecting, large torque ripple and inconstant inverter switching frequency, a novel control...
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