Applied Mechanics and Materials Vol. 340

Abstract: To determine the moment of inertia for the flywheel of the exercise bicycles, its example model and testing method are introduced, and also a testing system according with the international standard and having the ability to test the moment of inertia for the flywheel of the exercise bicycles is designed. The feasibility of this testing system has been verified by practices.

Abstract: Integral sum graph was introduced by Harary. This theory is a labeling of graph. From a practical point of view, integral sum graph labeling can be used as a compressed representation of a graph, a data structure for representing the graph, and an alternative method for defining and storing graphs. In this paper, to give an integral sum labeling of fan graph, and to prove that all multiple composite fan graph are integral sum graphs with the sequence label method.

Abstract: This article is applying the Mathematician Markov's theory of Decision Process to analyse the flight data of a fleet of planes, so that summarizing and forecasting the trends of safety in an airline's organization. The article uses one airlines' fleet with only one type of aircraft, focusing on the flight data, i.e. landing acceleration factors as a study of flying safety and there occurrences at certain times. In addition, the study will detail this process and describe it through using the language of mathematics. Finally, the writer also gives the suggestions which can improve flying safety and how to use this model of Dynamic Planning

Abstract: To improve the probability of correct acquisition for distributed antenna system, a cooperation verification method of distributed antennas is proposed. In the flat Rayleigh channels of linear cell, the difference of time-delays is firstly exploited to compose a pre-condition for cooperation. Then, the timing acquisition based on threshold detection is performed at each distributed antenna. For eliminating part of acquisition errors, the cooperation verification is introduced into the timing acquisition according to pre-condition. Analysis and simulation results verify the correctness of the proposed method.

Abstract: DisplayPort is a powerful digital display interface to connect a video source to a display device, and DisplayPort can transmit audio and video with high effectiveness. In this Paper, we present a novel high-definition video monitor system based on DisplayPort. After a careful investigation of DisplayPort characteristics and high-definition video features, we propose a three-layered high-definition video monitor system including: 1) High-definition Camera Layer, 2) Camera Control Gateway Layer and 3) DisplayPort based client Layer. High-definition videos can be transmitted from camera to client with high speed, and can be display clearly on Client owing to DisplayPort.

Abstract: We generalize the concept of edge-balanced labeling to the concept of edge-balance index set of graphs. In this article, we define all class of the nested graph with infinite for the integer and investigate the edge-balance index set of a class graph. In particular, we completely determine the edge-balance index sets of the class graph for the integer and solve formula proof and graphic tectonic methods.

Abstract: A novel method for measurement of power line communications channel transmission characteristics on the basis of PN sequences excellent periodic autocorrelation properties is presented and discussed in this article. In order to improve the measurement precision, a compensation method in frequency domain is proposed in this paper also. This measurement method can easily and quickly obtain channel characteristics inculding reliable amplitude and phase frequency response characteristics. The measurenent experiment results basically consistent with the vector network analyzers measurement results, which has demonstrated the efficiency of the measurement method.

Abstract: This article introduces a novel fault line selecting method which is based on the wavelet packet energy. With the db10 wavelet packet decomposition of zero-sequence transient current signal of the fault branch line, it can eliminate the component of base band of reflecting the fundamental frequency. Based on this, it can get wavelet energy of the various branch line. If a line of energy is obvious superior in contrast with the other line energy, then it is the first decision for branch line fault. Secondly, it can give the possible fault line sorting according to the principle of from large to smalland start the circuit recluse to monitor the current of the order in sequence. While 3U₀ is disappeared, then determining the fault line is the maximum energy lines. If not, then continuing to monitor energy big line until the fault line is selected. The simulation results show that the accuracy rate of the fault circuit selecting method is higher, it can be applied to the fault circuit selecting of cable mixed in distribution networks.

Abstract: This thesis goes deep into the vehicle scheduling problem (VSP), which is the key problem for the distribution center.This paper analyzes and optimizes the mathematical model of vehicle scheduling problem. The problem of dynamic vehicle scheduling with time windows is described in great details in the thesis, which also gives an arithmetic solution aiming at the scheduling problem.Finally, based on the research results and under the background of logistics distribution enterprises, the vehicle scheduling algorithm is exposed to experiment.

Abstract: This paper designs a community automatic irrigation control system based on Zigbee aiming at the shortcomings of existing community plant irrigation and the characteristics of the community. The green space of the community is divided into a plurality of irrigation area, each irrigation area and main control module adopts distributed structure network, using TIs CC2530 as the core processor of Zigbee wireless micro processing module, realized reliable data transmission between the regional control node and the master control module. The experimental results show that the system realizes effectively automatic saving water irrigation, and it is economical and practical.