A personalized trustworthy service selection method is proposed to fully express the features of trust, emphasize the importance of user preference and improve the trustworthiness of service selection. The trustworthi...A personalized trustworthy service selection method is proposed to fully express the features of trust, emphasize the importance of user preference and improve the trustworthiness of service selection. The trustworthiness of web service is defined as customized multi-dimensional trust metrics and the user preference is embodied in the weight of each trust metric. A service selection method combining AHP （analytic hierarchy process） and PROMETHEE （preference ranking organization method for enrichment evaluations） is proposed. AHP is used to determine the weights of trust metrics according to users＇ preferences. Hierarchy and pairwise comparison matrices are constructed. The weights of trust metrics are derived from the highest eigenvalue and eigenvector of the matrix. to obtain the final rank of candidate services. The preference functions are defined according to the inherent characteristics of the trust metrics and net outranking flows are calculated. Experimental results show that the proposed method can effectively express users＇ personalized preferences for trust metrics, and the trustworthiness of service ranking and selection is efficiently improved.展开更多
Evaluations connect ecosystem and human welfare to achieve restoration. There have been an increasing number of studies conducted on various ecosystem service assessments, but little research has focused on inland riv...Evaluations connect ecosystem and human welfare to achieve restoration. There have been an increasing number of studies conducted on various ecosystem service assessments, but little research has focused on inland river basins playing a critical role in development in northwestern China. The distinct differences in natural endowment, socioeconomic characteristics among the upper, middle and downstream inland river basin require heterogeneity during evaluation. The objective of this study was to verify the existence of population preference heterogeneity and examine impact factors using choice experiment surveys in the Shiyang River Basin, China. A mixed logit model using data from 714 households across the entire basin estimated mean willingness to pay and the standard deviation for ecological attributes. Ordinary least squares（OLS） was employed to estimate the effects of exogenous variables on all willingness to pay estimations. The results demonstrate that ecosystem service values are heterogeneous among people. Willingness to pay is affected by personal and regional characteristics. Government involvement will be required to seek differentiated ecosystem services values among populations and facilitate public support.展开更多
基金The National Natural Science Foundation of China(No.60973149)the Open Funds of State Key Laboratory of Computer Science of the Chinese Academy of Sciences(No.SYSKF1110)+1 种基金the Doctoral Fund of Ministry of Education of China(No.20100092110022)the College Industrialization Project of Jiangsu Province(No.JHB2011-3)
文摘A personalized trustworthy service selection method is proposed to fully express the features of trust, emphasize the importance of user preference and improve the trustworthiness of service selection. The trustworthiness of web service is defined as customized multi-dimensional trust metrics and the user preference is embodied in the weight of each trust metric. A service selection method combining AHP （analytic hierarchy process） and PROMETHEE （preference ranking organization method for enrichment evaluations） is proposed. AHP is used to determine the weights of trust metrics according to users＇ preferences. Hierarchy and pairwise comparison matrices are constructed. The weights of trust metrics are derived from the highest eigenvalue and eigenvector of the matrix. to obtain the final rank of candidate services. The preference functions are defined according to the inherent characteristics of the trust metrics and net outranking flows are calculated. Experimental results show that the proposed method can effectively express users＇ personalized preferences for trust metrics, and the trustworthiness of service ranking and selection is efficiently improved.
基金the National Social Science Major Funding(15ZDA052)the National Natural Science Foundation of China(71373209)
文摘Evaluations connect ecosystem and human welfare to achieve restoration. There have been an increasing number of studies conducted on various ecosystem service assessments, but little research has focused on inland river basins playing a critical role in development in northwestern China. The distinct differences in natural endowment, socioeconomic characteristics among the upper, middle and downstream inland river basin require heterogeneity during evaluation. The objective of this study was to verify the existence of population preference heterogeneity and examine impact factors using choice experiment surveys in the Shiyang River Basin, China. A mixed logit model using data from 714 households across the entire basin estimated mean willingness to pay and the standard deviation for ecological attributes. Ordinary least squares（OLS） was employed to estimate the effects of exogenous variables on all willingness to pay estimations. The results demonstrate that ecosystem service values are heterogeneous among people. Willingness to pay is affected by personal and regional characteristics. Government involvement will be required to seek differentiated ecosystem services values among populations and facilitate public support.
