Papers by Author: Hai Feng Wang

Abstract: According to the tropical island of Hainan land use types of the actual situation, conduct targeted training to choose, determine the object of study by IDRISI software and technology by means of the spectral characteristics of the data obtained by the calculation analysis and feature comparison, the data conclusions, so as to Next to study land use type data base.

Abstract: With remote sensing technology and computer technology, remote sensing classification technology has been rapid progress. In the traditional classification of remote sensing technology, based on the combination of today's technology in the field of remote sensing image classification, some new developments and applications for land cover classification techniques to make more comprehensive elaboration. Using the minimum distance classifier extracts of the study area land use types. Ultimately extracted land use study area distribution image and make its analysis and evaluation.

Abstract: Method based on vague optimization evaluation is vague pattern recognition. There are six detailed steps of application. The first, Set up Techno-economic indicator system. Secondly set up preparative optimization scheme sets. Thirdly set up optimal scheme in theory. It is made up of each Techno-economic indicator optimal data. Fourthly transform techno-economic input data into vague data. The fifth, Calculating similarly measures. Similarity measures will be evaluated between preparative optimization scheme vague sets and optimal scheme in theory. The last is vague optimization evaluation. The weight of each preparative optimization scheme is given. The data of weighted similarity measures by the weight factors are obtained. And applying them we obtain the good and bad sort of vague optimization scheme. The new similarity measures formula between vague sets is given. The formula is indispensable in the method of vague optimization evaluation. Application examples show that the Vague optimization evaluation method to the conclusion is reliable.

Abstract: This article describes the invention and development of electronic nose technology. According to the International and domestic technology development situation in recent years and based on the basis of the electronic nose technology for mango, banana, papaya and other the typical tropical crops products, for example, to have the quality identification detection experiment with Agricultural and sideline products .Compare PCA-BP the LDA-BP neural network recognition effect Design a conceived program. which is a professional portable electronic nose technology systems, Specifically for Hainan's tropical agricultural products quality inspection.

Abstract: With the rapid development of the internet and wireless mobile communication technology, more and more users make use of mobile terminal to access to the internet. Wireless mobile accessing technology combined with IPv6 protocol have been the present research hotspots. In this paper we analyzed the layered switching based on mobile IPv6 protocol, and compared its performance of technology. At last, corresponding conclusion is given, combining with the practical application.

Abstract: In the process of the simulation FHMIPv6, build a reasonable experimental platform for experimental basis, based on the condition of network NS2 to construct an analog environment for its experimental requirements of the network environment platform and give script data.

Abstract: Virtual Private Network (VPN) refers to rely on the ISP (Internet service providers) and other NSP (Network service provider), in the public network, to establish a dedicated data communication network technologies. In the virtual private network, between any two nodes connected no dedicated network for the traditional end-to-end physical link, but to use a public network composed of dynamic resources. VPN technology can reduce the internal network building costs, improve user network operation and management flexibility, and enable communication between computers and private circuits on computer communications with the same security.

Abstract: With the continuous development of the Internet, it while brings each kind of beneficial information to the people , the hacker, viral as well as the malicious destruction and so on bad factor also multiplies along with it the spread, the network security and the reliability have become the focal point which various countries pay attention together .