Advanced Materials Research Vols. 989-994

Abstract: In order to prolong the lifetime of wireless sensor networks, improvement of cluster-head selection mechanism based on LEACH protocol is proposed. To make the energy distribution more uniform, we consider the relationship of the density of nodes, residual energy of nodes and distance between nodes and Sink node. It eliminates the defect of energy consumption imbalance in the network caused by random position of cluster-heads and the problem of premature death of nodes caused by low energy nodes becoming cluster-heads. Simulation results show that compared with LEACH algorithm, the improved algorithm extend the network lifetime.

Abstract: In this paper, the design scheme, technical route and system structure of the interactive marine incinerator operation training system based on Web3D are proposed based on the study of the marine engine room simulator project. The virtual reality technique, visual C# and IE real-time interaction technology are introduced to the marine incinerator operation training system and the development thoughts of the interactive marine incinerator operation training system based on Web3D are elaborated based on the 3D modeling optimization and real-time interaction technology. This study is a new type of marine engineering training mode, it can better meet the STCW convention in Manila amendments on incinerator equipment management requirements.

Abstract: At present, cluster based routing protocols have been the main solution of routing scalability problem in wireless sensor networks. Based on the deep research on cluster based routing protocols, cluster based routing protocols were divided into two parts. The main routing protocols of each part were reviewed and analyzed. This work will contribute to the further study of cluster based routing protocols.

Abstract: Host scanning and port scanning are the basis for attacking information system. The technologies commonly used in these scans can be classified as ICMP scanning, TCP scanning and UDP scanning. We analyze these technologies and make comparisons among them. Totally, ICMP are mainly used to discover the host, while the TCP and UDP are mainly for port scanning, except for ACK. At the same time, using certain special TCP datagram such as SYN packets and ACK packets, and UDP datagram, we can make a host scanning in a secret manner.

Abstract: Massive amounts of data frequently need to be communicated in the internet of things where the channel is wireless. CDMA is a good technology to combat fading. In order to improve the system capacity or the spectrum efficiency, more than one carrier can be employed. Both the transmitter structure and that of the receiver are given in this paper. The interference item, as well as the received signal, is carefully analyzed. A summary, after some simulation results is given in the end.

Abstract: Aiming at the shortcomings of slow convergence speed and instable optimal routing which will occur when ant colony algorithm is applied in wireless sensor networks, an improved algorithm is proposed in this paper, which can be used to optimize cluster heads number, cluster unequally and keep the majorizing clusters stable. In addition, the improved ant colony algorithm is used for routing in the majorizing cluster. Simulation experiments show that the stable cluster colony algorithm is useful in reducing the energy consumption and improving the speed of data package transmission.

Abstract: According to Hainan smart tourism problem characteristic, a new leisure agriculture intelligent system was proposed combining agricultural technology and the Internet of Things technology. The paper illustrates the overall structure of the system, then design the software platform frame of the system which on Struts, Hibernate, Spring Framework for J2EE technology. The system may provide an effective solution for leisure agricultural intelligent; the intelligent data center analyzes and processes the data, combine with the expert decision-making system, providing support for the user to better understand, then real-time tracking, make cultivation strategies or control online, the user can browse the information via the Internet .

Abstract: Constructing sports e-government platform is an important content that all levels sports departments carry out sports optimal allocation of resources, expand the development and use of sports information resources and to improve the level of development of sports undertakings. For difficult problems in the construction of sports e-government platform, this paper studies the technical framework and functional framework. The technical framework is composed of seven sub-systems that Infrastructure layer, Database layer, Basic components layer, Core services layer, Application system layer, Portal layer, Access channel layer and so on. The functional framework is composed of five sub-systems that Sports information distribution system, Sports transverse application system, Sports office automation system, Sports management information system, System maintenance management system and so on. Contents of this paper focus on improving the level of application, government information resources development and utilization as the main line, for enhancing sports work management, promoting the development of sports undertakings plays an important role.

Abstract: The paper explains the Ethernet/IP and CIP communication protocol and its application in the industrial automation systems, and designs a software system based on many construction cases,which can be transplanted to variety of the medium.

Abstract: Through the analysis, a group signature scheme based on discrete logarithm is put forward in this paper. strengthen the validation of the members when they join the group; Records the time stamp of the revoked member into the database, to prevent the forged signatures; To recognize the forge the signature of the revoked and illegal members. Finally, analysis shows the scheme satisfies correctness and security.