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Introducing improved Asmuth-bloom scheme into database watermark, can recover the watermark based on part of data. This algorithm has a good effect of security and resisting subset attack, embedded information increased, and the performance improved much. This algorithm has good application in protecting the copyright of database.
It is difficult to search a right image on Internet. In this paper, we present a web image retrieval method using multi-agent. We described the types of agents used in image retrieval. The software architecture of a web image retrieval system is presented in this paper. We described the implementation of an image retrieval system with multi-agent, which is efficient, flexible and practical.
For maximizing the effective applications of remote sensing in crop recognition, crop performance assessment and canopy variables estimation at large areas, it is essential to fully understand the spectral response of canopy to crop development and varying growing conditions. In this paper, the spectral properties of winter wheat canopy under different growth stages and different agronomic conditions...
Network has made significant influences on people, involving both negative and positive aspects, among which the most striking one may be the influence connected with the violence. The purpose of the current study was to explore the appraisal index of violent information to lay a foundation for online culture safety management. Empirical study indicated that the factors influencing the violent picture...
Two phases of remote sensing image data of Dandong city taken respectively in 1989 and 2001 were interpreted through ERDAS software and the change of landscape pattern was analyzed with three categories of indices from the landscape pattern and landscape levels by means of using FRAGSTATS software. The results showed that the construction land was dominant and expanding tendency was obvious with glebe,...
Real estate industry plays an important role in economy development of Tianjin. It is practically significant for Tianjin to get the rule of real estate development and analyze its fluctuation. In this paper, we first collected the relevant data of Tianjin real estate, and then adopted single index, complex index and diffused index to analyze the fluctuation of Tianjin real estate industry in recent...
Based on the advantages and disadvantages of LUK's and LI's algorithms, a symmetric distributed mutual exclusion quorum generation algorithm with variable-length has been presented. Through introducing the concepts of laxity and average permission repeat times, the time complexity of this quorum generation algorithm became to O(N/2) and the quorum length became N1/2+laxity.
Study is performed of the weekly cycle of temperature indices (its diurnal range, mean, maximum and minimum) based on 1996-2005 surface observations from four big cities over the Yangtze River Delta of China. Results suggest that these temperature variations are featured by significant weekend effect (WE) in that these temperatures are higher at weekends than on workdays in summer as opposed to those...
The index system was constituted in this paper using meteorological data, vegetation data, soil data and socio-economic statistics, and then eco-environment vulnerability was evaluated. Based on the powerful spatial analysis function of GIS, using 100m×100m real area as basic unit, the eco-environment vulnerability of Baishan Region was evaluated with the Analytical Hierarchy Process and Weighted...
The FastICA algorithm based on Newton's iteration method can rapidly find hidden independent component from the mixed observations, and is widely used in the field of blind source separation. However, we need further improve the algorithm performance when processing massive data (such as image data). In this paper, an improved FastICA algorithm is proposed for blind source separation by establishing...
This paper presents a brief synthesis of the information obtainable from remote sensing data and how they can be used to design the land degradation assessment model. The use of the Modified Soil Adjusted Vegetation Index (MSAVI), Soil Wetness Index (SWI) and Land use derived from the Landsat Thematic Mapper (TM) were derived for detection and assessment of land degradation in Guyuan County, Hebei...
Product innovation is the main way for the economic development of enterprise, but product innovation project is high ricky and uncertainty, so the risk assessment and management of product innovation project has become concerned about academic and business community.This paper intends to do a systemic analysis of product innovation project risk evaluation, researching the product innovation project...
Based on two sets of TM data and CBERS data ( acquired in 1993 and 2008, respectively ), and by means of the techniques of remote sensing (RS), geographical information system (GIS), and landscape ecology, this paper studied the dynamic development of wetland landscape patterns from 1993 to 2008 in Daqing River downstream. The results showed that as the intensity of human activities gradually strengthened...
Based on RS and GIS technology, use the landscape pattern analysis software FRAGSTATS3.3, analyzed landscape changes in Miyun county in 1990, 2000, 2009 nearly 20 years. From landscape structure, spatial distribution and relationship aspects discussed about the landscape changes. Using patch area index, path density index, edge density index, shape index, connection Index and cohesion index describe...
On December 7th 2007, the CHANGSHA-ZHUZHOU-XIANGTAN urban agglomeration became “nation-al resource-economic and environment-friendly society” (two-oriented society for short) approved by the State Council, whose essence is to establish the ecological and civilized society. The urban forest is not only the leading force that improves the urban ecological environment, but also the important factor that...
Based on the information of land-uses which was achieved by the satellite remote sensing TM image in 1990 and 2006, this paper took the main urban area of Guangzhou as a study area to analyze its structure and dynamics of land-use changes, as well as the spatial variation of the land-use by dynamic degree of land-use, land-use composite index, and the compactedness coefficient and relative entropy...
This article aims the actual situation of China government websites construction in view of user and references on other research result of government websites performance evaluation. We makes use of AHP to evaluate index weights. Based on fuzzy method for quantitive calculation to evaluate comprehensively performance of government website, We designs a reasonable and objective evaluation system of...
Internet is penetrating into every aspect of people's life. It brought forth significant influences on us, involving negative and positive. Among these influences, the passive effects of online eroticism needed especially attention. The current paper aimed to explore the appraisal index of erotic information to offer foundations for online culture safety management. Empirical study indicated that...
Traditionally speaking, the error growth rate is considered unpredictable because of the uncertainty of unavoidable errors in data collection. A new kind of errors can be detected in the forecast with a non-uniform continuity index. The results based on a simulation of the T213 ECMWF model support our new founded facts that the errors caused by non-uniform continuity between the forecast fields and...
In the process of rapid urbanization, urban land use cover was changed by human activities. In order to maintain sustainable development in land use, it is very important to study dynamical characteristics of land use and the processes of land cover changing in urban region. As a case of Huadu district of Guangzhou, temporal and spatial characteristics of land use in 1990-2005 were analyzed with remote...
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