Advanced Materials Research Vols. 271-273

Abstract: In this paper, by using skin-color feature, especial location and pixel features of eyes in face area, an efficient face detection algorithm was designed. After face detection, discrete cosine Transform (DCT) was used to extract a set of observation, which is provided to train and recognize faces in the way of Hidden Markov Model (HMM). In order to solve the shortcoming that traditional motion detection algorithm can not be used to detect slow moving objects from an image sequence, an improved method was proposed by rebuilding the background.

Abstract: To compare the differences of the gross tumor volume(GTV) of lung cancer defined by radiologists and radiation oncologists and evaluate the influence of subjective variability to normal tissue complication probability(NTCP) of heart.

Abstract: To determine the variation in delineation of the gross tumor volume(GTV) of lung cancer on CT images with different window width(WW) and window level(WL).

Abstract: This paper gives a particular description about the packets routing procedure in mobile IP systems through a practical network topology. How Proxy ARP and Tunnel are applied in mobile IP systems is also discussed in this paper. These give some reference for implementing mobile IP systems.

Abstract: This article employs single closed loop of voltage negative feedback circle to explore the welding wire sending system of arc welder, as the system of this style has the feature of rough sending and poor dynamic behavior. A double closed loop PWM digit speed adjustment system is proposed based on fussy adaptive-adjusting PID control algorithm. The experiment result indicates that this control system not only has a sound dynamic behavior and static behavior but also has a strong self-adapting behavior, and mostly eliminates the arc flutter made by the rough welding wire sending system.

Abstract: Data center develops rapidly in recent years. With the emergence of new equipment and technology, data center network encounters many problems. Fat tree model is proposed and solves some problems. However it has some drawbacks. Based on the previous studies and current technology this article improves and proposes an amendment model which is higher availability and more efficient for actual situation.

Abstract: With the development of the technology and society, the resolution of the wireless LAN would be the direction which is leading the smart home LAN’s construction, the IR, RF, Bluetooth, Zigbee, GPRS, and others wireless methods have been applied in the smart home smoothly, like the control, security, data transmission, now it is time to specified the rules for the wireless technology in the smart home, this paper introduces a kind of the smart home wireless bus protocol that based on the Modbus protocol, and the hardware and PC software have been designed for it, the project achieved the operation and communication among the nodes, the test realizes that it has the better data transmission mechanism when adopting the wireless bus protocol, and make sure the reliability of the data transmission between the nodes in the smart home.

Abstract: With regard to road tunnel fire situation, the smoke extraction system is very important for effective control of fire temperature as well as crowd safe evacuation. The section form of smoke outlet is one of the main factors affecting smoke extraction. Taking a certain large scale cross-section road tunnel as physical model, this paper carried out simulation analysis on several fire scenarios with the help of software FDS. By comparing with different flow rates of each section of smoke outlet as well as the corresponding calculated danger approaching time, the appropriate smoke outlet section was attained which could be a reference for practical projects.

Abstract: Successful World Expo is first a safe Expo and a safe Expo needs reliable fire security. Based on the general requirement of planning and construction of Shanghai 2010 World Expo, through the analysis of the demand on fire protection features, this paper carries out planning research on fire safety layout, fire station, municipal fire protection water supply, fire control equipment, fire protection communication, fire protection of building, emergency shelter, emergency preplan fire-fighting, fire safety measures, technical standards of fire protection, etc. Hence, it would provide the essential foundation of disaster prevention and safety technical support for the successful hosting of Shanghai 2010 World Expo.

Abstract: The smoke characteristics of tunnel fire are preliminarily concerned with the heat release, the tunnel geometry, smoke outlet geometry, etc. However, the study on smoke characteristics of tunnel fire with different cross passage interval is relatively less at present. Base on the physical model of a large scale cross-section road tunnel, this paper carried out simulation and analysis on the smoke flow of several fire scenarios under different cross passage interval through FDS 5.4.3. The results demonstrated that in a certain extent while the cross passage interval was less than 400m, the longer the cross passage interval was, the longer the time when the smoke began to counter flow in the tunnel and the longer the length of counter-flow smoke. If the cross passage interval was beyond this scope, the time that the smoke began to counter flow and the length of counter-flow smoke tended respectively to be the same.