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The provision of services and products (hereinafter, ”services, etc.”) at various stores is carried out in the flow of 1) selection of services, 2) order (order receipt), 3) accounting, 4) provision of services. As each process may be waiting for orders or waiting for accounting, the provision of services etc. at stores can be thought of as a multistage queue model. In this paper, we analyzed using...
Traffic retention is an important factor of intelligent transportation system, which can vividly reflect current state of the road. Accurate estimation of traffic retention can provide support for the dynamic allocation of the traffic signal, thus alleviating the problem of urban traffic congestion. The traditional method can only estimate the long-term or red light traffic retention according to...
The rise of the network economy and E-commerce has pushed the rapid development of logistics market. The Multi-tier Shuttle Warehousing System (MSWS) as a new autonomous unit load storage/retrieval system, which flexibility and work efficiency is much-improved compared with the conventional AS/RS, has attracted more and more attention of logistics enterprises both at home and abroad. MSWS is composed...
In the modern industry, human-robot collaboration is becoming more and more important. With the quick development of the small production, the demand of flexibility is growing heavily. Gesture recognition is important for the collaborative work of humans and robots. In industrial applications, the performance of such systems affects the safety of human workers and their manufacturing efficiency. In...
Train cruising movement simulation module is an important part of high-speed train moving simulation system. According to the actual cruising movement characteristics of high-speed train, it is very important to design high-speed train cruising movement simulation algorithm to improve the calculation accuracy of train moving simulation system. Based on the conditions and the characteristics of high-speed...
As a key component of DC medium voltage breaker, the switch mechanism is required to open in high-speed and can withstand the breaking voltage which is generated during opening motion. Thus, the design of driving circuit of switch mechanism is very important to optimize the mechanism structure and improve mechanism opening characteristics. First the motion principle of high-speed switch was given...
Listen-Before-Talk category 4 (LBT Cat4) mechanism is considered as the most appropriate access method for Licensed-Assisted Access (LAA) framework, especially when LAA system coexists with WiFi system in unlicensed bands. Previous investigations of the LBT Cat4 based LAA-WiFi coexistence provide experimental results and simulation results, and theoretical analysis work is relatively rare. This work...
We present the simulation results comparing the upset sensitivity of different types of the majority voters. We conducted the SPICE-level simulations by means of the proposed technique that provides layout-aware analysis taking into account diffusion and circuit effects. The calibration of the model parameters was provided by the analysis of experimental SEU cross section and sensitivity maps of 6T-cell...
The purpose of this paper is to present the achievement of the Hybrid Petri Nets techniques used for modeling and behavioral analysis of a class of hybrid systems. In our sense, a dynamic hybrid system contains at least two distinct subsystems which interact: a continuous subsystem (linear, or not) and a discrete subsystem with a finite number of states. In this context, after a brief introduction...
With the accelerated urbanization process in China, more and more attention has been paid to residential environment quality. How to improve atmospheric quality, accelerate pollutant emission and reduce resource consumption by rationalizing layout is one of the most important issues in developing a healthy community. Based on the method of fluent flow field simulation, this paper chooses and analyzes...
Based on the perspective of ensuring business continuity through communication and cooperation between the members, the vulnerability of facility management organization under the interference of emergency was studied. The model and simulation of organization network of facility management based on knowing, emotion, consulting and collaboration relationship was put forward. With the case study, there...
This article is devoted to the formation of the dynamic measurement model of the cities' readiness to implement Smart City technologies. The hypothesis of the study is the assumption of the simulation modeling possibility in terms of determining the degree of cities' readiness for the introduction of Smart City technologies. The aim of the research is to develop a model of dynamic measurement of cities'...
Dual-active-bridge (DAB) DC-DC isolated converter is widely used in many applications e.g. power supplies, transportations and renewable power systems. In this paper, general modulation characterization and optimization of DAB converters have been analyzed and advanced modulation methods are proposed. Simulations and experiments are implemented to verify the effectiveness of the proposed modulation...
Vacuum Circuit Breaker (VCB) consists of the main frame with the operating mechanism and the main circuits including VI (Vacuum Interrupter). Especially, a VCB for the generator protection, which is used in a power plant, requires very large contact spring force because it has to be able to withstand the high short circuit current. In order to release closing energy of VCB, the cam type mechanism...
Hybrid Electric Vehicles (HEVs) require the power to drive the vehicle via a combination of internal combustion engine (ICE) and electric motors. To improve the drivability, the smooth torque change during the driving mode switching is essential. This task can be achieved by using the coordinated control strategy. This paper presents a coordinated control strategy which can effectively suppress the...
To study the impact on stability and security of the power grid that large-scale Photovoltaic (PV) generation systems integrated, the need for new models and simulation methods is increasing. Firstly, in this paper, a novel simplified phasor model is proposed based on the description of common detail model and averaged model for the PV generation system. The structure of the simplified phasor model...
The objective of this work is to analyze and understand the operation of the elevators system, simulating and optimizing the traffic of individuals in elevators. Passive elements (queues) and active (processors/servers) are analyzed. A simulation methodology is developed for passive and active elements using the system methodology to discrete events. The heuristic method is used in an attempt to find...
The paper proposes a novel validity evaluation method, Improved Feature Selective Validation, in order to evaluate the uncertainty analysis results in Electromagnetic Compatibility simulation. By comparing with the questionnaire results, it is shown that the proposed method can provide more accurate evaluation than a previous method called Mean Equivalent Area Method.
Scientific simulations on high performance computing (HPC) platforms generate large quantities of data. To bridge the widening gap between compute and I/O, and enable data to be more efficiently stored and analyzed, simulation outputs need to be refactored, reduced, and appropriately mapped to storage tiers. However, a systematic solution to support these steps has been lacking on the current HPC...
Simulation of the traffic flow is an effective approach to resolve the traffic congestion problem and expect to elucidate the traffic congestion mechanism. In this paper, we propose a traffic flow model based on the MLD (Mixed Logical Dynamical) system approach which regard the lane change and overtaking behavior. The research revealed that traffic jam spreads from driving lane to overtake lane.
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