Applied Mechanics and Materials Vol. 681

Abstract: The object of this paper analyzes the reliability level of pre-stressed concrete continuous girder bridges using incremental launching method during construction stages. Typical cross-sections used in the example bridge are considered at construction and service stages, respectively. The calculated results indicate that the reliability indices on the code of D62-2004 vary considerably to the code of JTJ 023-85. Comparing the reliability indices between the constructions shows the different regularity.

Abstract: Due to the brittle rock deformation is not obvious, and the destruction process has the features of sudden and concealment, it is often neglected in the field during construction. In this paper, Brittle rock was selected as the research object. Using the vault subsidence as monitoring parameters, the excavation process was simulated in single line tunnel by the finite element analysis tool of ANSYS, we obtain the maximum displacement of brittle rock and stress variation with time. Then the subsidence effect of different buried condition were analyzed, to determine the stability period of IV Brittle surrounding rock. The research results can be used to guide the development of the monitoring standard, in underground engineering construction of the brittle rock.

Abstract: With regards to the foundation pit problems our company encountered in several excavation, a brief introduction and analysis are made, and the corresponding innovative solutions are elaborated so as to provide a reference for High-rise building deep excavation design, construction and emergency treatment scheme.

Abstract: This paper presents the results of the effects of anodes for impressed current cathodic protection (ICCP) system on reinforced concrete. Experimental tests were carried out on reinforced concrete specimens with 3 different kinds of commercial anodes that are used for ICCP in order for comparative study. Results have shown that the type of anodes is irrelevant to the effectiveness of cathodic protection. CP current similarly flowed to the anodes regardless of anode types in seawater condition. In addition, current was much higher in seawater condition than freshwater and air condition. The results show that titanium rod anode was slightly more effective in fresh water, and titanium mesh anode showed a better performance in atmospheric condition. The potential drop caused by concrete resistance in atmospheric condition should be considered at depolarization potential measurement.

Abstract: High-rise super large aerial platform project construction has been a greater danger, How to ensure the quality of components assembled and the safety of the construction project is worthy of study. Through finite element analysis on construction conditions of steel structures, ensures the hydraulic synchronous lifting and construction technology of high-altitude hoisting and assembly, greatly reduced the difficulty of installation, quality, safety, cost, schedule is guaranteed.

Abstract: Removed due to plagiarism

Abstract: Wireless sensor networks (WSNs) is taking an increasing role in our lives. Because the energy of the sensors is limited how to efficiently use the energy to prolong the lifecycle of the sensor networks is very important. In this paper, a novel energy-balanced dynamic routing algorithm based on ACO is proposed. The novel routing algorithm can dynamically choose routing according to the residual energy of the sensors and the sensors with more power is taken more data transfer tasks. The simulation results show that the proposed routing algorithm can effectively balance energy consumption and prolong the lifecycle of the networks.

Abstract: XML based publish/subscribe systems are on tremendous rise during recent years. In order to get interested documents, the subscribers submit an XPath Query. In such applications, there is often a mismatch between how publishers describe entities and how different subscribers express their interests. Lots of researches focus on filtering mechanisms, exists such as XFilter, YFilter, Afilter etc, but most of these mechanisms do not use the structural property of XML. This paper proposes an approach which dose XPath query expansion based on structural information. Firstly check query node in OWL classes and return semantically related data performing semantic normalized. Secondly, perform structural expansion depend on the XSD which set constraint on content published. Experiment results show that our approach performs well across a range of XPath queries and documents.

Abstract: As the development of WoT(Web of Things), a large mount of services emerge. How to make full use of these services is a hot research area nowadays. This paper focuses on making these services more valuable in WoT Smart Home scenario. In this paper, we propose a model called service selection model based on rule and statistics into WoT Smart Home scenario. It is a combination of rule model and statistics model. It not only automatizes the service selection process by adopting statistics algorithm, but also dramatically improves the accuracy of this process by combining rule and statistics. Further more, it saves efforts of the annotation of service rules greatly. We carry out some experiments to verify the efficiency of this model by comparing with rule model and statistics respectively. The results show that the combination model can efficiently and precisely select services.

Abstract: Researchers have proposed several security protocols to protect the electronic commerce security in these years; however, not all of them are secure enough. This article extends model checking method with Casper/FDR2 to model and analyze a new electronic protocol. Attacks are found in the protocol and their mechanisms are discussed. A variety of solutions are given to different security flaws. The improved protocol is proven to be robust and secure.