Papers by Keyword: Layer

Abstract: Fundamental to the IMP, is the requirement to provide a harmonized data model and represent it appropriately, including geometric tolerances information that can be understood well by computers and users. In this paper, we propose a layered conformance level geometric tolerances representation model. This model uses the widely applied ASME Y14.5M-1994 as its foundation layer by abstracting most information from this standard. Thus, different application domains in an enterprise can use this data model to exchange product information. This model is further transformed with XML Schema that can be used to generate XML instance file to satisfy geometric tolerances representation requirements in IMP. Fig.1 A typical feature control frame and its possible symbols. Fig.2. Example part.

Abstract: The technical research method of multilayer semantic on network data defines as below. The first layer means the extraction of semantic information from different layers in order to construct and reflect fully the deep information of data. The second layer is the integration of different degree and intensity semantic information based on semantic information extraction. The third layer is to establish exUCL(extended Uniform Content Locator) semantic label so as to express semantic information of each layer synthetically and to understand and research on the cross layer semantic integration.

Abstract: We consider in the present work the fusion laser cutting of stainless steel sheets under a nitrogen laminar gas jet. The molten metal is treated as a laminar and steady viscous incompressible fluid. The mathematical model describing our problem is set in terms of Navier-Stokes equations, solved numerically using the finite differences method, where the effect of the gas jet velocity on the molten boundary layer is considered. The generated shear stress occurring on the gas-liquid interface and its contribution in the momentum is carried out, and it is found that when the skin friction and the shear stress decrease, the thickness and the velocity at the edge of the molten boundary layer increase along the kerf surface. The layer thickness reduces when the assisting gas velocity is increased.

Abstract: The concept of Cloud Computing dates from the 1960s, when computer scientist John McCarthy proposed the idea of computation being delivered as a public utility. Infrastructure as a Service is one of the most important modules of Cloud Computing. In this paper, we propose a hierarchical and architecture of Cloud Computing Infrastructure as a Service frameworks. Our hierarchical and architecture consists of five main layers: resource layer, service layer, middleware layer, management layer, control layer. We study various Cloud Computing systems. Then we provide a Cloud Computing Infrastructure as a Service architectural framework that bases on the hierarchical architecture. Finally, we introduce a detailed description of each layer and define dependencies between the layers and components.

Abstract: In view of the present domestic demand with data processing technology of seismic while drilling, a set of software system suitable for data processing of seismic while drilling was developed. The software was based on the hierarchical structure and the article described the architecture of the seismic while drilling data processing software system. It also defined the function at all levels in detail. The results showed that: the software system based on the hierarchical structure is stable and has good adaptability and extensibility.

Abstract: At present, technology related to GEO is wide used in the civil and military fields. In this paper, firstly, the generation of GMR-1 was introduced and then a detail illustration of how to comprehend the GMR-1 system and its structure was made by comparison between GMR-1 specifications and GSM standard. These two specifications were compared in terms of the physical channel, logical channel, bursts, mapping and so on. The analysis indicates that GMR-1 modified the lower layers for the satellite channel. In the end, we are looking ahead to the future of the GMR-1.

Abstract: Website architecture model is introduced in this paper as a whole, it mainly illuminates design process of three layer architecture model, states characteristics and advantages of layer architecture, demonstrates main points and difficulties of every layer design in detail. The model of website design can be reused by applicating object-oriented concept to website design.

Abstract: In this paper, cylindrical plasma was generated steadily in a cylindrical cavity by high-frequency AC discharge, and some cylindrical plasma were layered directly against each other to form a plasma layer. The cylindrical plasma layers effect on microwave transmission attenuation was measured by the vector network microwave measurement system in the frequency range 2~18GHz experimentally. The factor, such as wave polarizations, electron densities and the number of layers were analyzed. In the set of the experiments, cylindrical plasma layer was more effective to VP wave than HP wave. And this layer was effective in the frequency range 2~10GHz; in this band, the attenuation can be adjusted uniformly by changing the electron densities. The double cylindrical plasma layers were more effective than the single one.

Abstract: mageries are acquired by digital cameras using a single sensor covered with a color filter array (CFA). The most generally employed CFA pattern is Bayer CFA. Therefore in the acquired CFA imagery, each pixel includes only one of three colors: they are red, green, and blue. This CFA color interpolation methods reconstruct losing color information of the other two primary colors for every single pixel. In a single pair of Bayer CFA, there are two green pixels and one red pixel and one blue pixel. In this paper, we interchanged green pixel with other colors. The performance comparison is shown in Experimental results section.

Abstract: The particle reinforced metal matrix composite have hard particles dispersed in matrix which make them difficult to machine with conventional machining methods. Electric discharge machining (EDM) is an effective tool for machining such materials. This experimental study was undertaken to identify the significant factors that affect the output responses while machining of 10 vol%Al2O3/Al composite material. The material removal rate (MRR) and tool wear rate (TWR) have a direct relationship with current and an inverse relationship with pulse on-time. Appropriate levels of current and pulse on time levels can be chosen while roughing and finishing operations. Normal polarity between terminals had higher MRR than with reverse polarity. The recast layer had a non-uniform and wave-like morphology and cracks penetrated into the matrix phase resulting in high residual stresses exceeding the ultimate tensile strength of the material. Pulse on-time has greater influence on recast layer thickness than current. The reinforced particles were all clustered under the machined surface with very few in the recast layer which results in a low strength of the machined surface. The presence of reinforced particles in recast layer is very rare, so it is desirable to remove it. Keywords: electro-discharge, machining, aluminum matrix composites, material, removal, tool, wear, roughness, recast, layer