A new set of binary sequences-Periodic Complementary Binary Sequence Pair (PCSP) is proposed. A new class of block design-Difference Family Pair (DFP) is also proposed.The relationship between PCSP and DFP, the proper...A new set of binary sequences-Periodic Complementary Binary Sequence Pair (PCSP) is proposed. A new class of block design-Difference Family Pair (DFP) is also proposed.The relationship between PCSP and DFP, the properties and existing conditions of PCSP and the recursive constructions for PCSP are given.展开更多
The probabilities of the following events are first discussed in this paper: the insurance company survives to any fixed time k and the surplus at time k equals x≥1 . The formulas for calculating such prob...The probabilities of the following events are first discussed in this paper: the insurance company survives to any fixed time k and the surplus at time k equals x≥1 . The formulas for calculating such probabilities are deduced through analytical and probabilistic arguments respectively. Finally, other probability laws relating to risk are determined based on the probabilities mentioned above.展开更多
A novel algorithm called Colony Location Algorithm (CLA) is proposed. It mimics the phenomena in biotic community that colonies of species could be located in the places most suitable to their growth. The factors work...A novel algorithm called Colony Location Algorithm (CLA) is proposed. It mimics the phenomena in biotic community that colonies of species could be located in the places most suitable to their growth. The factors working on the species location such as the nutrient of soil, resource competition between species, growth and decline process, and effect on environment were considered in CLA via the nutrient function, growth and decline rates, environment evaluation and fertilization strategy. CLA was applied to solve the classical assignment problems. The computation results show that CLA can achieve the optimal solution with higher possibility and shorter running time.展开更多
Future of Information Professionals After graduating 3 years ago with my MBA,I now find myself backin the a cademic world trying to solve amajor problemthat I
As XML has been increasingly important as the Data-change format of Internet and Intranet, access-control-on-XML-properties rises as a new issue. Role-based access control (RBAC) is an access control method that has b...As XML has been increasingly important as the Data-change format of Internet and Intranet, access-control-on-XML-properties rises as a new issue. Role-based access control (RBAC) is an access control method that has been widely used in Internet, Operation System and Relation Data Base these 10 years. Though RBAC is already relatively mature in the above fields, new problems occur when it is used in XML properties. This paper proposes an integrated model to resolve these problems, after the fully analysis on the features of XML and RBAC. Key words XML - RBAC - access control method - RBAC CLC number TP 309 Foundation item: This Research was Partially Supported by the Grants from 863 High Technology Foundation of China (2002AA116030), the National Natural Science Foundation of China (60073014, 60273018), the Key Project of Chinese Ministry of Education (03044) and the Excellent Young Teachers Program of M0E, P.R.C (EYTP)Biography: MENG Xiao-feng (1964-), male, Professor, Ph. D, research direction: web information integration, XML database, mobile database.展开更多
Great uncertainty exists in reservoir models built for blocks where well spacing is uneven or large. The uncertainty in reservoir models can be significantly reduced by using Coordinate Cokriging Sequential Gaussian S...Great uncertainty exists in reservoir models built for blocks where well spacing is uneven or large. The uncertainty in reservoir models can be significantly reduced by using Coordinate Cokriging Sequential Gaussian Simulation technology, in combination with the restriction of seismic characteristic data. Satisfactory reservoir parameter interpolation results, which are more accurate than those derived only from borehole data, are obtained, giving rise to a reasonable combination of widespread and dense-sampled seismic (soft data) data with borehole data (hard data). A significant effect has been made in reservoir parameter modeling in the Chegu 201 block of the Futai Oilfield by using this technology.展开更多
This paper deals with some initial-oblique derivative boundary value problems for nonlinear nondivergent parabolic systems of several second order equations with measurable coefficients in multiply connected domains. ...This paper deals with some initial-oblique derivative boundary value problems for nonlinear nondivergent parabolic systems of several second order equations with measurable coefficients in multiply connected domains. Firstly, a priori estimates of solutions for the initial-boundary value problems are given, and then by using the above estimates of solutions and the Leray-Schauder theorem, the existence and uniqueness of solutions for the problems are proved.展开更多
In view of the interconflict of multi-objectives in large decision systems, the problem that ranks all the objectives according to several standards is posed. Quantifing the value of decision for objectives according ...In view of the interconflict of multi-objectives in large decision systems, the problem that ranks all the objectives according to several standards is posed. Quantifing the value of decision for objectives according to the traits of researched systems, with the frequency distribution, we construct quantitative indices and then build up the comparative relation of superior and inferior between any two decisions and introduce the relation function which reflects not only the orientation of order but also the extent of superior and inferior for decisions. With calculating the weight coefficient, we put forward several comparative coefficients and finish off the order of superior and inferior of all the decisions for several conflict objectives. By positivist analyses, the solution shows its precise and concise traits dealing with complex decisions. Key words conflict - multi-objectives - coordination - schemes CLC number O 221. 6 - C 934 Foundation item: Supported by the National Sociality Foundation of China (98AJY002)Biography: LIU Wei (1955-), male, Associate professor, research direction: statistic analysis, risk analysis.展开更多
With the growing popularity of the World Wide Web, large volume of useraccess data has been gathered automatically by Web servers and stored in Web logs. Discovering andunderstanding user behavior patterns from log fi...With the growing popularity of the World Wide Web, large volume of useraccess data has been gathered automatically by Web servers and stored in Web logs. Discovering andunderstanding user behavior patterns from log files can provide Web personalized recommendationservices. In this paper, a novel clustering method is presented for log files called Clusteringlarge Weblog based on Key Path Model (CWKPM), which is based on user browsing key path model, to getuser behavior profiles. Compared with the previous Boolean model, key path model considers themajor features of users'' accessing to the Web: ordinal, contiguous and duplicate. Moreover, forclustering, it has fewer dimensions. The analysis and experiments show that CWKPM is an efficientand effective approach for clustering large and high-dimension Web logs.展开更多
Data cube computation is a well-known expensive operation and has been studied extensively. It is often not feasible to compute a complete data cube due to the huge storage requirement. Recently proposed quotient cube...Data cube computation is a well-known expensive operation and has been studied extensively. It is often not feasible to compute a complete data cube due to the huge storage requirement. Recently proposed quotient cube addressed this fundamental issue through a partitioning method that groups cube cells into equivalent partitions. The effectiveness and efficiency of the quotient cube for cube compression and computation have been proved. However, as changes are made to the data sources, to maintain such a quotient cube is non-trivial since the equivalent classes in it must be split or merged. In this paper, incremental algorithms are designed to update existing quotient cube efficiently based on Galois lattice. Performance study shows that these algorithms are efficient and scalable for large databases.展开更多
Supply chain is a complex, hierarchical, integrated, open and dynamic network.Every node in the network is an independent business unit that unites other organizations to develop its value, the competition and coopera...Supply chain is a complex, hierarchical, integrated, open and dynamic network.Every node in the network is an independent business unit that unites other organizations to develop its value, the competition and cooperation between these units are basic impetus of the development and evolution of the supply chain system. The characteristics of supply chain as a complex adaptive system and its modeling are discussed in this paper, and use an example demonstrating the feasibility of CAS modeling in supply chain management study.展开更多
This paper focus on how to make distributed top-k query in e-commerce environment through web service. We first give the query process in such environment, then we present an algorithms for processing such queries, wh...This paper focus on how to make distributed top-k query in e-commerce environment through web service. We first give the query process in such environment, then we present an algorithms for processing such queries, which based on the query model we defined. Experimental results show that the algorithms is efficient.展开更多
基金Supported by National Natural Science Foundation of China (69972042),Natural Science Fund of Hebei Provice(599245)and Science Foundation of Yanshan University
文摘A new set of binary sequences-Periodic Complementary Binary Sequence Pair (PCSP) is proposed. A new class of block design-Difference Family Pair (DFP) is also proposed.The relationship between PCSP and DFP, the properties and existing conditions of PCSP and the recursive constructions for PCSP are given.
文摘The probabilities of the following events are first discussed in this paper: the insurance company survives to any fixed time k and the surplus at time k equals x≥1 . The formulas for calculating such probabilities are deduced through analytical and probabilistic arguments respectively. Finally, other probability laws relating to risk are determined based on the probabilities mentioned above.
基金This work was supported by the National Natural Science Foundation of China (No. 70171056)the Key Lab Foundation of Education Ministry,Santou University, China
文摘A novel algorithm called Colony Location Algorithm (CLA) is proposed. It mimics the phenomena in biotic community that colonies of species could be located in the places most suitable to their growth. The factors working on the species location such as the nutrient of soil, resource competition between species, growth and decline process, and effect on environment were considered in CLA via the nutrient function, growth and decline rates, environment evaluation and fertilization strategy. CLA was applied to solve the classical assignment problems. The computation results show that CLA can achieve the optimal solution with higher possibility and shorter running time.
文摘Future of Information Professionals After graduating 3 years ago with my MBA,I now find myself backin the a cademic world trying to solve amajor problemthat I
文摘As XML has been increasingly important as the Data-change format of Internet and Intranet, access-control-on-XML-properties rises as a new issue. Role-based access control (RBAC) is an access control method that has been widely used in Internet, Operation System and Relation Data Base these 10 years. Though RBAC is already relatively mature in the above fields, new problems occur when it is used in XML properties. This paper proposes an integrated model to resolve these problems, after the fully analysis on the features of XML and RBAC. Key words XML - RBAC - access control method - RBAC CLC number TP 309 Foundation item: This Research was Partially Supported by the Grants from 863 High Technology Foundation of China (2002AA116030), the National Natural Science Foundation of China (60073014, 60273018), the Key Project of Chinese Ministry of Education (03044) and the Excellent Young Teachers Program of M0E, P.R.C (EYTP)Biography: MENG Xiao-feng (1964-), male, Professor, Ph. D, research direction: web information integration, XML database, mobile database.
文摘Great uncertainty exists in reservoir models built for blocks where well spacing is uneven or large. The uncertainty in reservoir models can be significantly reduced by using Coordinate Cokriging Sequential Gaussian Simulation technology, in combination with the restriction of seismic characteristic data. Satisfactory reservoir parameter interpolation results, which are more accurate than those derived only from borehole data, are obtained, giving rise to a reasonable combination of widespread and dense-sampled seismic (soft data) data with borehole data (hard data). A significant effect has been made in reservoir parameter modeling in the Chegu 201 block of the Futai Oilfield by using this technology.
文摘This paper deals with some initial-oblique derivative boundary value problems for nonlinear nondivergent parabolic systems of several second order equations with measurable coefficients in multiply connected domains. Firstly, a priori estimates of solutions for the initial-boundary value problems are given, and then by using the above estimates of solutions and the Leray-Schauder theorem, the existence and uniqueness of solutions for the problems are proved.
文摘In view of the interconflict of multi-objectives in large decision systems, the problem that ranks all the objectives according to several standards is posed. Quantifing the value of decision for objectives according to the traits of researched systems, with the frequency distribution, we construct quantitative indices and then build up the comparative relation of superior and inferior between any two decisions and introduce the relation function which reflects not only the orientation of order but also the extent of superior and inferior for decisions. With calculating the weight coefficient, we put forward several comparative coefficients and finish off the order of superior and inferior of all the decisions for several conflict objectives. By positivist analyses, the solution shows its precise and concise traits dealing with complex decisions. Key words conflict - multi-objectives - coordination - schemes CLC number O 221. 6 - C 934 Foundation item: Supported by the National Sociality Foundation of China (98AJY002)Biography: LIU Wei (1955-), male, Associate professor, research direction: statistic analysis, risk analysis.
文摘With the growing popularity of the World Wide Web, large volume of useraccess data has been gathered automatically by Web servers and stored in Web logs. Discovering andunderstanding user behavior patterns from log files can provide Web personalized recommendationservices. In this paper, a novel clustering method is presented for log files called Clusteringlarge Weblog based on Key Path Model (CWKPM), which is based on user browsing key path model, to getuser behavior profiles. Compared with the previous Boolean model, key path model considers themajor features of users'' accessing to the Web: ordinal, contiguous and duplicate. Moreover, forclustering, it has fewer dimensions. The analysis and experiments show that CWKPM is an efficientand effective approach for clustering large and high-dimension Web logs.
文摘Data cube computation is a well-known expensive operation and has been studied extensively. It is often not feasible to compute a complete data cube due to the huge storage requirement. Recently proposed quotient cube addressed this fundamental issue through a partitioning method that groups cube cells into equivalent partitions. The effectiveness and efficiency of the quotient cube for cube compression and computation have been proved. However, as changes are made to the data sources, to maintain such a quotient cube is non-trivial since the equivalent classes in it must be split or merged. In this paper, incremental algorithms are designed to update existing quotient cube efficiently based on Galois lattice. Performance study shows that these algorithms are efficient and scalable for large databases.
文摘Supply chain is a complex, hierarchical, integrated, open and dynamic network.Every node in the network is an independent business unit that unites other organizations to develop its value, the competition and cooperation between these units are basic impetus of the development and evolution of the supply chain system. The characteristics of supply chain as a complex adaptive system and its modeling are discussed in this paper, and use an example demonstrating the feasibility of CAS modeling in supply chain management study.
文摘This paper focus on how to make distributed top-k query in e-commerce environment through web service. We first give the query process in such environment, then we present an algorithms for processing such queries, which based on the query model we defined. Experimental results show that the algorithms is efficient.
