Applied Mechanics and Materials Vols. 446-447

Abstract: The green house is a green building technology in residential application of the specific embodiment .It is the use of ecological principles and following the principles of sustainable development, ecological balance that is to design, organize indoor and outdoor spaces in residential buildings of various material factors and create no pollution, ecological smooth the built environment. Ecological Housing characteristics summarize in four aspects, namely, comfortable, healthy, efficient and beautiful. The pursuit of comfort and health are the basis of ecological residence and the pursuit of efficiency is the core of ecological residence as well as the pursuit of beauty is in harmony with nature ecological house of perfection. At present, the construction market in the application of ecological and energy-saving technologies exist errors, green technology does not mean that the ecological high-tech and high cost. Green paper from the overall current situation of residential construction, and ecological building techniques are used in a variety of ecological and energy-saving technologies that were specific research in the "Ecological housing design," The profound basis of knowledge and research focusing on ecological housing should be adopted by the design principles of appropriate technology through the specific architectural practice. It summarizes the key on the actual project that should be considered and applied technology.

Abstract: In order to make up for the defects of new and old aggregate, making full use of the function of silicon fume and hybrid fiber, cyclic loading tests were carried out on five concrete with recycled aggregate columns and an ordinary concrete frame column under the combined influence with different admixtures and its ratios (silica powder and hybrid fiber) . This text was focused on the properties and failure pattern of specimens, displacement ductility coefficient, ultimate displacement rotation and horizontal bearing capacity. The test results showed that a low content of silica powder could improve ductility performance, while the addition of hybrid fiber made the ductility to be further enhanced and improved the early strength by a larger margin than later stage. With the constitutive relation and adjusting the modification coefficient of concrete stress strain curve using MATLAB, It could be more accurate on the bearing capacity of the columns.

Abstract: Utilization of high tech engineering materials such as composites has been extensively applied in the industries of civil, mechanical and aerospace due to their favourable characteristic such as high stiffness to weight ratio, improve corrosion and environmental resistance and potential reduction of processing. This research is carried out to study the feasibility of laminated composite after cured at different angle due to gravity effects to enhance the curing space required. Vertically cured laminate having similar or improved properties with common horizontally cured laminate to save much space bringing huge advantage especially to the developing Small and Medium Industries / Entrepreneurs (SMI/E). The horizontal cured laminate composite no doubt will fill up the spaces which SMI/E lacks of. Polyester and E-type fiber glass were the main raw materials used in the research via vacuum bagging technique to drain out the excess resin applied as well as minimize the void or air in the laminated composite. The laminated composite fabricated is cured at different curing angle positions in room temperature for 24 hours under the gravity effects. Five samples were prepared according to the ASTM standard to undergo hardness test. From the testing, SN6 which cured at 75˚ had the closest hardness to the horizontal cured control sample.

Abstract: In recent years, with the requirements of environmental protection of packaging materials improve, biodegradable materials more and more attention to. This paper to waste as raw materials, and by the synthesis of the biodegradable packaging material performance for research. The results show that: to recycle waste as raw material, add natural renewable material alkali lignin and cellulose, and influence factors of sheet material performance, get the film material performance is the ideal process parameters. According to People's Republic of China national standard GB/T6342-92 "plastic compression performance test method" and GB/T20197-2006 "degradable plastics the definition, classification, signs and degrade the performance requirements," as determined by the experimental method for testing. The orthogonal experiment results show that waste polyurethane: alkali lignin: cellulose = 3:4:6 made materials when mechanical properties and degradation is better. Compressive strength for 340 KPa, biodegradable sex for 40.1%, have reached national standards.

Abstract: Network coding has recently attracted attention as a substantial improvement to packet retransmission schemes in wireless multicast broadcast services (MBS). In this paper, we are interested in applying the maximum clique approach to the network coding based multicast retransmission problem in the MBS systems. Our figure of merit is the transmission efficiency which is an important design parameter for some MBS systems, such as the satellite broadcasting networks since it affects the energy efficiency and delay of the system directly. We show that introducing the idea from network coding allows us to realize significant benefits in terms of transmission efficiency for the problem of multicasting and broadcasting, and develop an algorithm that allow to realize these benefits in practice.

Abstract: Patent retrieval plays a very important role in product innovation design. However, current patent retrieval approaches lack semantic comprehension and association, and usually cannot capture the implicit useful knowledge at a semantic level. In order to improve the traditional patent search, this paper proposes a novel ontology-based automatic semantic annotation approach based on the thorough analysis of patent documents, which combines both structure and content characteristics, and integrates multiple techniques from various aspects. Multilayer semantic model is established to realize unified semantic representation. The approach first utilizes template schemes to extract the structure information from patent documents, and then identifies semantics of entities and relations between entities from the content based on natural language processing techniques and domain knowledge, and at last employs a heuristic pattern learning method to abstract patent technical features. Case study is provided to show that our approach can acquire multi-level patent semantic knowledge from multiple perspectives, and discover semantic correlations between patent documents, which can further promote the accurate patent semantic retrieval effectively.

Abstract: Good positioning accuracy and coverage are important evaluation criterion for Wireless Sensor Network localization algorithm. DV-HOP is one of the classical range-free localization algorithms, which has good adaptivity and flexibility when node density (ND) and anchor density (AD) are both smaller. However, DV-HOP doesn't consider asymmetric links' influence in heterogeneous network, which is analyzed and proved as the main reason for poor positioning accuracy in DV-HOP. Then a Range-Free Localization Algorithm in Wireless Sensor Network with Asymmetric Links (RLAAL) is proposed, whose kernel mechanisms are Neighbor Discovery Algorithm (NDA) and Least Hops Acquiring Mechanism (LHAM). Every Node uses NDA to find all neighbors and uses LHAM to find least hops to Anchor nodes. Simulation results show that RLAAL can reduce asymmetric links' influence and have better positioning accuracy and coverage than DV-HOP.

Abstract: In P2P networks, malice peers forge identity to interrupt routing, called Sybil attack. To avoid it, methods in related works consider routing as random walk. Since the destination of random walk is hard to predict, Sybil-proof P2P networks need large routing information to support routing. However, a large size routing table constrains the scalability of the system. Therefore, we aim to develop a routing algorithm to satisfy the requirement of P2P networks which has a good performance at Sybil-Proof by using a reasonable size of routing table. Social links are useful to prevent a Sybil attack because friend peers have little chance to be a Sybil peer. In this proposed method, reputation of social link is useful for achieving this objective. Considering the distance to destination peers can help for routing efficiency and considering the reputation can make routing to have better performance resisting Sybil-attacks.

Abstract: The purpose of this Study is to analyze the accuracy of a network RTK GPS, by performing taping, triangulation & Network RTK (Real Time Kinematic) GPS observation on certain measuring points and comparing all locational data based on the calculational & geometric solution method. The deviation in the measured length & coordinate between the steel tape and the Network RTK GPS was within 2cm while the deviation in the measured coordinate between the triangulation and the Network RTK GPS was within 3cm. With the fact that the performance of the taping or the triangulation is less sensitive to its surroundings taken into consideration, it could be concluded that an average locational accuracy of most Network RTK GPS processes in Korea was within 3cm.

Abstract: Wireless Sensor Network (WSN) is a network which connect the human and the nature. The lifetime is an important standard which measures the network is good or not. The routing can influence on the lifetime of the network. This paper mainly introduces some routing protocols in WSN and describes their advantages and shortcomings.