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This paper introduces a simulation software, named Simatrix, for designing millimetre-wave reflector antenna and transmission system based on Diffracted Gaussian Beam Analysis. DGBA is a fast and modularized method for quasi-optical system (QOS) analysis. The Simatrix offers the functionalities of modeling and simulating 3D asymmetrical QOS, designing systems which contain shaped-mirror reflectors...
Hand pose estimation in cluttered environment is always challenging. In this paper, we address the problem of hand pose estimation from RGB-D sensor. To achieve robust real-time usability, we first design a data acquisition strategy, using a color glove to label different hand parts, and collect a new training data set. Then a novel hand pose estimation framework is presented, so that feature fusion...
This paper presents a Pore Network Model (PNM) based methods for design scaffold. In this modeling process, plenty of unit spheres that distributed in space coordinate randomly with different diameter within limits are created and permeated into the whole scaffold space. When the total volume proportion of the unit spheres ascends to a certain value, a PNM model is formed with the topological structure...
In tissue engineering, mechanical stimuli play an important role in the cell proliferation process. This paper developed a 3D model to analyze the shear stress distribution in porous scaffold dynamically. A series of 3D scaffolds with different porosity level (60%~80%) were constructed to generate a large amount of shear stress distributions in the CFD tool. The simulations revealed that average shear...
Building bone scaffold with controllable pore size is important. This paper presents a new design approach of internal structure in order to simulate pore character of the natural bone in the bone scaffold. A parametric structure of unit cell is used as the basic unit to build internal architecture. There are three types of global unit assembly paths in this method. Different linear control functions...
The localized management of sinus floor (LMSF) is one of key technologies in dental implant surgery, but the lining mucosa of maxillary sinus is easily impaled during LMSF surgery. This paper proposed a computer aided design method to construct 3-D finite element model of LMSF. Then the models are processed for analysis. Finally, the virtual surgery simulation was carried out from three aspects which...
To obtain the fairing surface model of the loss part of detective skull rapidly, a new modeling method on skull defect repair is proposed in this paper. This method is to adopt the surface reconstruction algorithm to construct the local model of defective skull based on the sub-pixel cube model. The holepsilas feature on the surface is automatically identified by adopting the dihedral angle criteria...
At present, the workflow technology has been widely used in manufacturing. The people rely more and more on the workflow management system (WfMS), at the same time, people have higher demand on the flexibility, stability, and interactive ability of WfMS. On Rapid Manufacturing (RM) field, there is still no systematic theoretical system in the aspect of the modeling measure in existence and the research...
An algorithm to generate macro-pores of bionic bone scaffold is proposed based on knapsack problem model in the paper. That is to construct the negative model of macro-pore structure of bionic bone scaffold according to the structure of knapsack problem model, with the ellipsoid as the basic unit, and the three-dimensional boundary of scaffold as the constrained space. Then, the model of bionic bone...
This paper aims to resolve the problem of lacking of necessary semantic information when Web service is described in the filed of Web-based manufacturing. An enterprise ontology model is built from the view of Web service. The enterprise class, as the center of this model, connects other classes, such as process class, resource class etc. Especially, the resource class is described in detail about...
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