Papers by Keyword: Visualization

Abstract: Baffles are frequently used to reduce flow speed and to change fluid passages by directly blocking oncoming flow. This study employed multi-stacked porous baffle obstructions to enhance the flow relaxations of water-soluble buoyant gases inside an odor removing basin system. We performed qualitative flow visualization by using tracing particles in working fluid to evaluate the effects of porous baffles. Particle image velocimetry technique was also employed to quantitatively analyze the flow field around the baffle regime. As a result, oncoming two-phase bubbly flow from the basin bottom regime was bent, passing the edge of a porous baffle plate. The main stream speed and momentum were effectively reduced by the installed porous flow obstruction devices.

Abstract: With the development of computer technology and information technology, voice interaction has become a necessary means of human-computer interaction, and voice signal acquisition and processing is the precondition and foundation of human-computer interaction. This paper introduces the MATLAB visualization method into voice signal acquisition system, and uses MATLAB programming method to drive sound card directly, which realizes the identification and acquisition of voice signal and designs a new voice signal visualization acquisition system. In order to optimize the system, this paper introduces the variance analysis algorithm into the design of visualization system, which realizes the optimization of voice signal recognition model with different level parameters. At the end this paper does numerical simulation on the speech signal acquisition system; through signal acquisition 2D and 3D visualization voice signals are obtained. It extracts single signal characteristics, which provides a theoretical reference for the design of signal acquisition system.

Abstract: The objective of this study is to experimentally investigate the mixed jet and oxygen transfer behavior of a vertical orifice nozzle. The experimental apparatus consisted of an electric motor-pump, an orifice nozzle, a circulation water tank, an air compressor, a high speed camera unit and controlling or measuring accessories. The entrainment ratio was calculated using the measured primary fluid flow rate and suction air flow rate with primary flow pressure. The visualization image of vertically injected air and mixed jet issuing from the orifice nozzle was analyzed qualitatively. As the air compressor pressure increases, the penetration length of mixed jet decreases and the mass ratio and dissolved oxygen concentration increase.

Abstract: In order to optimize the big data management of smart grid construction, analyze and process the extreme weather grid measuring point data of grid operation data which is abundant and discrete with mathematics. Considering of the continuous changing characteristics of weather in effective field of surface, buffer and expand the influential range of grid measuring point, then merge the same data, embellish the data with B-spline curve, store the spatial coordinates in enterprise-class grid resource centre, publish in map with unified service, and show the visual graphical distribution of extreme weather through OGC protocol, realize the visualization of grid resource.

Abstract: It is imperative for 3D modeling of mining or underground engineering to precisely and efficiently describe various interfaces, which is also the precondition for 3D visualization of underground engineering. NURBS (Non-Uniform Rational B-Splines) curve and surface technology are introduced in the paper. With help of analyzing 3D geologic structure of Laohutai mining area and comprehensive treatment of surfaces of tunnels and geologic structures. 3D geological surfaces of mining area are built which is the base of building complex 3D geologic modeling.

Abstract: Based on the high speed camera combined with a microscopic lens the near-nozzle spray surface structure and flow characteristics of the high pressure diesel fuel jet were investigated. During the steady period of the spray development, the periodically undulatory structure was observed at the circular direction of the jet at the near nozzle area at the injection pressure of 5MPa. The atomization of the spray improved and the periodical structure was veiled by fine droplets at higher injection pressure of 40MPa. During the closing period of the nozzle lift, the spiraling shape was also observed along the surface of the fuel jet which indicates the internal helical flow characteristic.

Abstract: In cloud computing, we have requested and used many resources from cloud vendors. Even though, hypervisor is a controller between hardware level applications and user application, Hypervisor will not provide the security for running huge user applications on guest platforms. As a customer perspective cloud is the domain which will offer numerous resources. But in cloud, when the users are running various process/applications on guest OS hypervisor will give the controlling notes or components, system configure and adaptation tools only. However, hypervisor will not have a focal point about security and need to be concerned about the possible factors for an applications which are consecutively perform on the guest OS . It doesn’t care about the end users security facts. This paper proposes an efficient security mechanism for hypervisor control to be developed / performed to improve the security aspects while application is running on virtual machine.

Abstract: Large consumers, one of the most important groups which power supply company serves, are nowadays producing increasingly prominent operational risks. The urgent problem that power supply companies face, is to scientifically, accurately and immediately control the risks and its impacts. This paper mainly forces on the visualization of large consumers’ operation risk information in the power supply company. First, the characteristics of operational risk information are analyzed from different dimension features, and various visual elements which are applicable to different risk factors are summarized. On the basis of the first step, combined with the diversified characteristics of large consumers’ risk information, two modified risk visual elements, Heatmap and Treemap, are designed. Finally, the visualization schemes of large consumers’ operational risk information are proposed by instance. Results show that administrators can timely discover and recognize large consumers’ operational risks from these schemes, which effectively improved risk visualization and early warning capabilities.

Abstract: This paper analyzed wireless sensor network simulation technology. We discussed the principles of wireless sensor network simulation based on NS2 and constructed a visual simulation model for wireless sensor networks. By adding NS2 protocol and setting the sensor nodes and some simple parameters, the system presented the running process and the performance of the network in the form of animation and graphics. The results show that this method simplifies the process of simulation of wireless sensor networks, and improves the efficiency of wireless sensor networks research and development, which provides support for the development of application-oriented networking of wireless sensor networks.

Abstract: Because uncertainty and complexity of the athlete’s injury risk factors, the general risk method can’t reflect the risk of athletes. Based on Bayesian probability estimation method, this paper proposes a new evaluation system of athlete injury risk. Combined with the VB programming and visualization display function, it realizes visual evaluation function of athlete injury risk, and the injury level of athletes is divided into three warning levels. Finally through risk assessment system, we get the effect curve of athletes training number and training time on the injury. From the results we can conclude that the training time has a certain randomness injury to the athletes, and training times are decisive factors to some injury of athletes. It provides technical reference and data support for the risk assessment of injury.