Advanced Materials Research Vol. 487

Abstract: The botnet consists of some computers controlled by an attacker and has become a major threat to the internet and users. Because the p2p botnet is a distributed network, making the identification of p2p bots is very difficult. In response to this threat, we present a p2p identification algorithm based on topology. This method only depends on three network behavior features. Our approach has a high detection rate and an acceptable low false alarm rate.

Abstract: By analysis of the reasons such as maladjustment, vibration and long balancing time which from existing motor-driven bi-weight balancer; we propose solutions and apply them into a new design of magnetic-driven bi-weight balancer. By means of analyzing the bi-weight balancer system, we have raised the rules for optimum movement of the balancing weight and its judgment principles. We have summarized the maladjustment-free control algorithm of bi-weight balancer, carried out simulation experiment verification. The results show that the mobile strategy can effectively improve the quality of auto-balancing and achieve the purpose of no maladjustment, no oscillation and short balancing time.

Abstract: Vehicle-pedestrian collision is a major type traffic accident in China, which has been attracted close attention by people because of its high fatality rate. However, it is difficult for traffic management department to reconstruct such kind of accident. In this paper, a methodology for simulation of vehicle-pedestrian accidents based on the multi-body dynamics is presented. A multi-body dummy pedestrian model is established based on PC-CRASH programs, the features that represent the different parts of the pedestrian are defined such as geometry, mass, contact stiffness and coefficients of friction. And more the model is introduced to simulate the collision in a real case of vehicle-pedestrian accident in Hangzhou. Different impact speeds are discussed to predict the different throwing distance of the pedestrian. The relation curves and equations between pedestrian’s throwing distance and vehicle impact speed are established from regression analyses of the simulation data. Finally, the impact speed is estimated with correspond to the exact pedestrian throwing distance.

Abstract: The inventory-routing problem is an important approach for the enterprises to save energy and improve efficiency. The improvement of the utilization rate of vehicles and the reduction of the dispatching cost can be realized by solving this problem effectively. This thesis focuses on the inventory-routing problem and put forward a heuristic algorithm based on the greedy rules whose key strategy is to cycle select the Hamilton transportation route with the current lowest unit cost. The simulation example indicates that this algorithm can effectively improve the trucking efficiency and save the transporting cost.

Abstract: The testing for graph isomorphism is one of the many problems in the subject of graph theory. This thesis proposes an algorithm for testing isomorphism of planer graph of polynomial time via structuring characteristics of planer graph based on distance matrix. The algorithm, with a time complexity of O (n^4) and a space complexity of O (n^2), has a great application value.

Abstract: All data of the data integration system needs to be transmitted through a data switching center, which is responsible for functions including collection, integration, storage, blending, switching and pre-treatment of real-times data. Included functions are real-time data caching, standardization of data interfaces, management engine for data integration, data pre-treatment and management terminal to the data switching center.

Abstract: The intake hood is the part which riveted in the external skin of the aircraft. During the flight of the aircraft, the engine casing is cooled down by the high-speed airflow which flows through the air intake duct. As the components suffer the impact of the high-speed airflow, the appearance of the intake hood must meet the requirements of the aerodynamic property. At the same time, its manufacturing quality has a certain impact on the aerodynamic performance of the aircraft, so its synthetic mechanical property is required high. The traditional air intake hoods are block-combination welded by the aluminum alloy sheet. Its complicated working procedure, long production cycle, high costs and the difficult weld methods make it difficult to guarantee the welding quality. In order to improve the useful life of the air intake hood, to lower the production difficulty and to solve the quality risks in the production due to the method of weld, in this article, the high-strength aluminum alloy ZL101A and plaster mould investment casting were used to mold the intake hood based on the three-dimensional geometric modeling of the air intake hood by software Pro/E, and then, the filling and solidification process of the air intake hood was simulated by the casting simulation software ProCAST to predict the defects such as misrun, cold shut, wrapped in air, the thermal centre and the residual stress and deformation which were displayed in the filling and the solidification processes of the metal. Then, the casting process of the air intake hood can be optimized to achieve a decrease or avoid casting defects in the actual production.

Abstract: In this paper, an “L” detection is proposed to check PCB short circuit ,open circuit, raised detect and recessed detect in a Automatic Optic Inspection(AOI). This method were researched and simulated in MATLAB environment, the results showed that it can raise the efficiency and accuracy.

Abstract: Stitched foam-core sandwich structure is a new light weight sandwich structure material. In this paper, flexural testing was performed. For comparison purposes, the stitched foam-core sandwich structure with different stitch density and the unstitched foam-core sandwich structure were tested. The experimental results show the maximum failure loads was decreased owing to stitch for the flexural testing. The bending stiffness increases for stitched foam-core sandwich structure.

Abstract: "Autonomic computing" the revolutionary idea of network computing as IBM's next generation of network computing to understand and predict the ultimate development, in October 2001 and was formally proposed research. Autonomic computing refers to computers with self-diagnosis, self-regulation, self-healing ability, without too much human intervention will be able to operate autonomously. IBM autonomic computing will be defined as "e-business infrastructure services to ensure the level of self-management (Self Managing) technology", with the ultimate goal is to make information systems to automatically manage their own, and maintain its reliability.