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There are many software can be carried out simulation of photovoltaic (PV) system such as PSIM and Matlab. Those software have their own advantages in the simulation of PV system. This paper proposed a joint-simulation of a stand-alone PV system based on PSIM and Matlab to achieve the maximum power point tracking (MPPT) of PV cells and the stability of PV system. In this paper, the main circuit is...
In order to classify the eaglewood, the work proposed a method of wood fiber segmentation and characteristic extraction based on the eaglewood micrographs. The active contour model was used to extract the contours of the eaglewood micrographs. After screening of wood fiber, the geometric features and shape factors were extracted to form characteristic vectors. After that, SVM was used to achieve the...
Nearshore wave model was established based on the enhanced Boussinesq equations, which were dispersed into orthogonal grids on spatial distribution and solved using alternating direction implicit (ADI) algorithm. There are three kind of boundary conditions which are absorbing boundary, reflecting boundary and wave-generating boundary in the model, while the wave on open boundary was driven by the...
Tension leg platform (TLP) is a kind of offshore structures for oil or gas exploration in deep-water which has its special feature as partly compliant and partly rigid. Extended tension leg platform (ETLP) is the third generation of TLP which made an improvement on the basis of typical TLP structure. Extended structure is the most notable feature of ETLP which could increase the distance of groups...
The problem of path-finding has to be solved in transportation, city planning, commercial computer games, navigation and many other fields. How to find the shortest path is the key point of this problem. For computer games and many other fields, since the maps are usually not very big, traditional algorithms such as Dijkstra algorithm and AStar algorithm work well. But if we want to find the shortest...
This paper presents an algebraic method for parameter identification of Thevenin's equivalent circuit models for batteries under non-zero initial conditions. In traditional methods, it was assumed that all capacitor voltages have zero initial conditions at the beginning of each test. This would require a long rest time between two successive discharging or charging tests, leading to very long test...
This paper focuses on the resource allocation and scheduling problem in steel information technology planning project in which constraints like resource, duration are taken into account. A mathematical model which aims at maximizing the project robustness is formulated to deal with the problem and an algorithm based upon PSO algorithm is proposed according to characters of the model. The results from...
Propulsion system is one of the most important parts of high altitude airship. It's really a need to build a simulation model of propulsion system and make some analysis about high altitude airship. An integrative model is established according to the matching of the torque between Rare earth permanent magnet Brushless DC motor[1∼2] and propeller in the use of Matlab/Simulink. Vast work is spent on...
The brushless DC motor, which emerged as the development of technology of electronics, is a new kind of DC motor, and it is also the important part of modern industry [1]. Because of its reliability of operation, brushless DC motor has been widely used in many special areas, such as aerospace and mining.
With Object Oriented (OO) method, this paper analyzed the operational process of Equipent Command (EC) and its information exchange capability with external environment. Consequently the EC federate was developed according to High Level Architecture (HLA) standards. This paper developed graphical modeling tool for workflow based on VC++, and created workflow model for EC in this tool based on timed...
This paper illustrates a novel formal method of component integrating for component-based development in safety critical area. Formal definitions of COTS component and safety verification method are presented, as well as a development framework is shown. Furthermore, we demonstrate a case study of zone controller (ZC) from railway communications-based train control system, with the help of tool set...
In railway transportation area, the demand for safety of electronic devices is very high. Automatic train protection (ATP) system is a key equipment of systems for train control. Safety verification is an important issue. Conventionally, safety is ensured by testing manually with a set of test cases after system being integrated. However, testing is a very cost-intensive activity and a complete set...
In order to study the applications of ESS in power systems, this paper proposes a standard procedure to develop a full mathematical dynamic model of power systems installed with ESS, which include SMES, AC, BESS and FESS. Results of computer simulation are presented to demonstrate the effect of ESS on power system dynamics. Investigation of power system stability as affected by the installation of...
In order to improve the whole design level of ship power system and reduce unnecessary expense, according to the actual situation of the ship power system, the transmission performance of monitor control network in ship power station is researched before prototype. Firstly, according to the actual power station, monitor-control network framework is given. The data incoming rule within power station...
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