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National Research Council Canada (NRC) is collaborating with College of the North Atlantic (CNA) to develop an ocean wave-driven pump to supply the CNA shore-based aquaculture centre in Lord's Cove, Newfoundland. NRC provides a combination of physical model testing under controlled laboratory conditions and computer simulation using numerical modelling tools developed at NRC and commercial software...
With the crank-slider mechanism, applied the principle of Cutting the screw thread(CST) to the low rear protective device of truck, devised a new type of device which supplied a new solution for the crash incompatibility. Firstly, according to the dimension of certain type of Foton light-duty truck and the requirement of regulation, took the maximum transmission angle as optimized object, with the...
In order to attain the maximum external cycle power of a-type Stirling Engine, first, this paper uses multi-objective optimization of the linear weighted evaluation method and with reference to the group AHP method to gain the optimal range of link rod ratio of general crank-connecting rod mechanism, then on that basis, it establishes optimal design model for the maximum external cycle power of α-type...
According to the working features of the drawing press,the article discusses its optimization design, how to establish the model and analyse dynamics based on Virtual Prototyping (VP) technology which integrates CAD, CAE and visual technologies, etc., and compared the simulative results and theoretic results. The results show that the motion characteristics of optimization model can meet to the sheet...
The leakage and diffusion accident of inflammable and explosive toxic gas has become a serious problem in the field of environment and security. Based on the optimized three-dimensional finite element model (FEM3) and the actual condition in complex and sealed space, a three-dimensional simulation system is developed to simulate the dynamic process of leakage and diffusion of gas in complex and sealed...
The submersible mixer as major sewage treatment equipment is very important to sewage treatment plant. The numerical simulation of the internal 3-D incompressible turbulent flow agitated flow field was carried out. By changing some design parameters of mixer impeller, we can analyze the numerical simulation results, they showed that: the impeller produced vortex jet flow, the constant velocity lines...
Volume of sealed radio-electronic device with surface mount is optimized. Thermal processes are simulated in computer-aided engineering systems. Ellipsoidal model of boundaries of operability domain is used. The nonlinear properties of heat transfer processes are taking into account.
An optimization technique for design of squeeze casting parameters of AZ91D magnesium alloy based on the Anycasting software was proposed in this paper. The various process parameters for a casting model of magnesium alloy were designed. Mold filling and solidification processes of the magnesium casting were simulated with the Anycasting. The simulation results indicated that process parameters significantly...
Employing mathematical modeling and analytical optimization techniques, traditional approaches to the resource-allocation (RA) problem for control of epidemics often suffer from unrealistic assumptions, such as linear scaling of costs and benefits, independence of populations, and positing that the epidemic is static over time. Analytical solutions to more realistic models, on the other hand, are...
The fuzzy analytic hierarchy process (FAHP), which decomposes the complicated objects into simple hierarchical decision-making processes, with the fuzzy pairwise judgment matrix is constructed by the fuzzy logic relation of the factors in each layer. The total fuzzy weights are obtained based on the weight of each layer, which provide the quantitative analysis basis for the decision-making. The volume...
Model optimization is an indispensable process in the generator operating simulation system which is realized by virtual reality. But the general algorithm often destroys the contours of the generator model. In order to ensure the correct contour model, propose the concept of layer scan based on the optimization algorithm in the LOD model, creates the point's specific data structure of normal. Make...
This paper studies the modeling method based on the unified constraint complex systems for the complex products' design and analysis. The method solves the multi-domain optimization problems by a unified constraint model. For the multi-domain physical systems, the model cell's libraries of the machinery, electronic, hydraulic, control systems and other areas are established. A digitized functional...
Information about a user and his intentions can be gained evaluating images acquired from the user's subjective perspective. A possibility to yield high quality images, even under dynamic conditions, is to align a camera with the human gaze direction. Thus, the camera orientation system must cope with the high dynamic human eye movements. Since the system is intended to be head-mounted it must keep...
This article firstly briefly introduces the principle of the non-linear Support Vector Regression Machine in the Support Vector Machines. Subsequently in order to improve and optimize the traditional Support Vector Regression Machine, Least Square Algorithm is adopted and Two-layer Planar Structure Optimization Method is put forward. Then the vessel traffic volume prediction model based on the optimized...
For the life cycle of products, the global unified multidisciplinary model is the core of the simulation optimization. It can effectively organize relative information, manufacturing resources and processes within the life cycle of products. The information has some differences in the content, format and pattern. So a consistent approach to describe the data and data relationships is needed. Using...
Visualization and simulation of rice plant make great significances to the research of quantification of field evapotranspiration, design of plant type, and optimization of cultural practices. With regard to the status that the modeling of rice plant is still weak and lack of software tool to visually simulate the structures and growth process of rice plant, a powerful and convenient rice plant modeling...
In order to improve the performance of 16V240ZJB diesel engine, the method of steady flow test and CFD numerical simulation was adopted to do intake port structure optimization study. The previous design model of intake port was tested in the steady flow experiment system which provided the boundary condition for simulation calculation. The three-dimensional CAD model of intake port was built and...
3D coordinate transformation is usually encountered issue in geodesy, photogrammetry, geographical information science (GIS) and computer vision. This paper simplifies the mathematical model of 3D similarity transformation by optimization process, which finally only has the parameter of rotation matrix. According to the orthogonality of rotation matrix, the paper uses Rodrigues matrix to represent...
In this paper we think the land price reflects to the geographical advantage. In order to analysis of accessibility, the spatial interaction model is known as a general model because it has been developed by entropy maximization principle for a long history. From observed data about traffic flow, our model can estimate traffic volume among inside and outside of target area by using observed traffic...
Aims to solve the geometric modeling problems of flexible cables for mechanical and electrical products in VRML environment in virtual maintenance, researching work is done by the means of VRML node technology and in the advance of its characteristics of autonomy, interactivity, realism, and network-support. Flexible cable models for virtual maintenance are established based on energy optimization...
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