The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Cloth is extremely weak in bending and its deformation is generally a small-strain-large-displacement post-buckling process. Cloth has multi-pattern deformation characteristics, which means it can form different shapes under the same boundary and loading conditions. The present paper aims to simulate cloth multi-pattern phenomenon by the minimum potential energy principle and the conjugate gradient...
Establish the geometric model of the pump shaft using the three dimensional modeling software based on the drawing of pump shaft parts. After a reasonable simplification, analyze and calculate the force of the pump shaft applying the traditional theory. Take the results as the boundary conditions for the software analysis. Introduce the model into the ANSYS software and calculate the stress and strain...
Reusable Component Technology (RCT) allows program of encapsulating similar behaviors that affect multiple modules into a sole module which can be reused by the related applications. CMM (Coordinate Measuring Machine) software is a relevant complicated system which normally consists of many modules and be suited to apply RCT. This paper presents a method with RCT to support data communicating among...
The paper focused on the processing of the free face, and it figured out a new method that is six-axis grinder NC system. Through such grinder NC system, the free face of blade can gain the high precision and efficiency of processing. The paper also promoted the NC system through added a module into the traditional NC system. With such module, the NC system can exchange data with CAD platform efficiently,...
The QSAR study of 67 selective HIV integrase inhibitors is based on Boosting regression combined with MLR. Seven descriptors have been calculated by E-Dragon software as independent variables. The IC50 values of compounds are used as dependent variables. Seven models have been constructed by MLR and their variables are selected by particle swarm optimization. By testing the generalization of each...
The fatigue crack easily occurs in the nodes of the steel truss bridges which are under long-term load of moving train, it may endanger the safety of a bridge and even lead to its collapse. Therefore, it is essential to research on it. This paper introduces the detailed procedures of modeling a 3-D straight through crack in a node of a steel truss bridge by using the commercial FE software ANSYS with...
Creating a realistic three-dimensional human face model has been one of the most difficult problems in the fields of computer graphics and computer vision. A method witch to build three-dimensional human face model basic on a photo of two-dimensional single front face is proposed in this paper. Firstly, facial organ distribution is identified from the photo by face recognition. After that, the standard...
Targeting at the present situation to the lower utilization rate of cable crane in the construction of hydropower project in China, this paper presents the effect of initial setting time of concrete placement on the utilization rate of cable crane, combing with the practical Xiluodu Hydropower Project, through the simulation of the construction of high arch dam. Research shows that along with the...
Spatiotemporal data model(STDM)are gradually becomes hot spots currently. As an application of STDM, the organization of real state spatiotemporal data has been paid more and more attention. The paper analyze the dynamic change of real estate data, puts forward an effective solution by adding time field to be able; and also propose a method which solve the problem that the fields of relational data...
With the close-range photogrammetry technology further development, and the resolution of digital cameras general increasing, the digital camera has become an important image data acquisition device. In this paper, through three-dimensional reconstruction of a small building, the two methods of fast three-dimensional reconstruction based on single image are researched, that the body and plane as the...
The existing RP(rapid prototyping) related software include a CAD module, a data processing module, and a monitoring and controlling module, which are independent of one another. Aiming at the issues above, this thesis picks-up the interior topological and geometrical information of model expressed in the boundary representation (B-Rep) using the development tools of ObjectARX and MDT(Mechanical Desktop)...
According to the engineering demands of the manufacturability evaluation, the blade part information model built up based on the generalized feature and STEP standard, and based on the secondary development of UG software, a CAD system based on features is realized. The system can realize automatic feature recognition. Based on the part information model that has been built up, the system can generate...
This article introduces a new method called Envelope Surface Model to establish 3D geological model of Surface mine fast, aiming to simulate 3D visual mining in surface mine. Firstly the method based on the establishment of 3D terrain Model and the 3D geological model of surface mine. The mining template is determined by actual production situation of surface mine, and realizes simulating surface...
To solve the traditional fault diagnosis can not be adapted to the complicated system, a kind of new multi-sensor fusion fault diagnosis method is presented. The method applies the theory of genetic algorithms and fuzzy logic to the BP (back propagation) neural network. Combined with BP and GA, it walks in several steps. Firstly, the best individual is chosen in current population and trained in order...
Currently combustion and emission performance of diesel engine under transient conditions has become the researching focus. It's full of research challenges because of highly variability of engine operations and complexity of chemical reactions. A simulation platform of turbocharged diesel engine with EGR (exhaust gas recirculation) loop under transient conditions, based on the software coupling technique...
Flow motion on curve surfaces of arbitrary topology is an interesting visual effect but a complex dynamics to simulate. In this paper, we introduce a novel and effective way to modal such dynamics. We propose a technique that adapts a unstructured lattice Boltzmann model (Unstructured LBM). The whole algorithm consists of five aspects, including surface modeling with unstructured triangular meshes,...
In 3D GIS, in order to quickly and accurately build 3D models, polygons which are formed by 2D vector data should be triangulated. At present, in GIS, ear clipping triangulation algorithm is widely used in triangulating simple polygons. Because ear clipping triangulation algorithm is low efficiency, more easily to generate long, narrow triangles, a continuous cutting algorithm for triangulating a...
The Access Grid (AG) is an important component of grid, and it can provide immersive, interactive and collaborative access to grid applications. Augmented Video Services (AVS) in AG build shared Augmented Reality environment to extend the service functionality of AG. It merges the real video scene of AG and 3D geometric model of grid services' results to allow users' manipulating the model collaboratively...
The design of Headframes' foundation is always a cumbersome and difficult process. Currently it need design in 3D environment and often need finite element analysis according to its importance while traditional design is focused on 2D construction drawings. This paper presents a rapidly 3D modeling method of headframes' foundation based on the analysis of its design process and points out that the...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.