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Objectives
The Jing people are a recognized ethnic group in Guangxi, southwest China, who are the immigrants from Vietnam during the 16th century. They speak Vietnamese but with lots of language borrowings from Cantonese, Zhuang, and Mandarin. However, it's unclear if there is large‐scale gene flow from surrounding populations into Jing people during their language change due to the very limited...
To carry out CAD (computer-aided design) for the complex combustion structure in engine, the top-down method is used. The general model is created in assembly and every part design is finished according to general assembly. The group of piston crankshaft connecting rod is designed and each part is modeled in Pro/E. Pro/E is a soLid modeler and this offers considerable advantage for soLid model creation...
This paper focuses on conceptual design automation of energy transforming systems. A Computer Aided Conceptual Design Expert System for Energy transformation (CACDESE) is introduced based on the product gene theory. The conceptual design of a solar engine system demonstrates that the proposed expert system can rapidly find the appropriate combinational principle solution from the knowledge base and...
Photovoltaic cells has a unique maximum power point under given condition of certain environment temperature and sunshine intensity. The paper first analyzes the advantages and disadvantages of traditional mountain climbing and three dots algorithm, then proposes a varied step size three dots mountain climbing algorithm based on the two, and simulates them by MATLAB. The results shows that this algorithm...
Computer-Aided Design is used to carry out 3-D (three dimensions) design for diesel engine combustion system. The diesel engine combustion system is designed and each part is modeled in Pro/E. Pro/E is a solid modeler and this offers considerable advantage for solid model creation. Normally, the geometry is first sketched in 2-D and then extruded in the third direction to generate a 3-D model. In...
Control arithmetic is the key part of monitoring system because it is difficult to formulate exact mathematical model due to nonlinear and time-varying characteristic of construction machinery. In order to improve the running efficiency, a fuzzy PID controller is designed and realized in the monitoring system based on ARM. Besides, three encapsulation functions are designed to carry out data transfer...
Because of complex operating environment and bad road conditions, how to guarantee that engineering vehicles can adapt the operating environment and run reliably, has become the hot spot attention topic of researchers and manufacturers. This paper focuses on the five freedom degrees model of engineering vehicle, and theory and structure of semi-active suspension. Based on the previous control strategies,...
The numerical simulation was carried out by building methane-diesel fuel model at the base of physical model and basic control equation of hydrodynamics, by adopting non-premix combustion method, by simplifying combustion as blends, and by calculating blend fraction. Furthermore, its combustion press field, temperature field and velocity field were analysed. Finally, the experimental results indicated...
Engine cold start is an important issue in the automobile development. The traditional control strategy of cold start is an open-loop control that results in a high HC emission. In the paper, the improved control strategy for SI engine cold start is discussed. And it indicates that the A/F ratio, ignition time and the desired idle speed are the 3 important parameters for the cold start. In order to...
In order to monitor construction machinery's performance and quality, an intelligent monitoring application system is presented in the paper. The system makes site monitoring cell installed on every construction machinery as its terminal, GPRS (general packet radio service) as its network carriers, intelligent monitoring center as controller. The system can supervise the running status and alarm when...
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