bluuebunny/crossref_metadata_2025_split huggingface dataset:
Modeling of RBAC‐based access control of virtual enterprise
Authors: Chen Dejun , Zhou Zude , Ma Yingzhe , Pham D.T. 
Published: October 2008

PurposeThe purpose of this paper is to create a model of role‐based access control (RBAC) based access control for virtual enterprise (VE).Design/methodology/approachAn access control model for security and management of VE is presented by integrating generic structure of VE and applying the principles of RBAC. In addition, the application of the model to a supply chain‐oriented VE illustrates that a general access control scheme can ensure the running of VE.FindingsA theory base of access control for the realization of the VE is found.Originality/valueThe paper presents a very useful new model of access control for VE. This paper is aimed at researchers and engineers.
Research on the grey relational evaluation method of core competencies of virtual enterprise members
Authors: Chen Dejun , Zhou Zude , Pham D.T. 
Published: October 2008

PurposeThe purpose of this paper is to create a model of role‐based access control (RBAC) for virtual enterprise (VE).Design/methodology/approachAn access control model for security and management of VE is presented by integrating generic structure of VE and applying the principles of RBAC. In addition, the application of the model to a supply chain oriented VE illustrates that a general access control scheme can ensure the running of VE.FindingsA theory base of access control for the realization of the VE is found.Originality/valueThe paper provides a very useful new model of access control for VE. This paper is aimed at researchers and engineers.
A class of strong deviation theorems for continuous random variables sequence
Authors: Chen Wenbo 
Published: October 2008

PurposeThe purpose of this paper is to obtain some strong deviation theorems for arbitrary continuous random variable sequences under suitable restrict Chung‐Teicher type conditions.Design/methodology/approachThe crucial part of the proof is to construct a.s. convergence super‐martingale by means of the notion of limit logarithmic likelihood ratio of random variable sequences and then applying the martingale convergence theorem.FindingsThe upper and lower bounds of the deviations from the sums of arbitrary continuous random sequence to their marginals are obtained.Research limitations/implicationsThe rigorous bounds are the main limitations which are difficult to obtain.Practical implicationsA useful method to study the property of dependent random sequence.Originality/valueThe paper presents the new approach of proof strong limit theorems.
An improved limited and variable precision rough set model for rule acquisition based on pansystems methodology
Authors: Wu Chen , Wang Lijuan 
Published: October 2008

PurposeThe purpose of this paper is to acquire doubly variable precision‐based knowledge rules from incomplete decision tables (IDTs) in the framework of pansystems methodology. It suggests a new variable precision limited tolerance – a special pansystems relation – rough set model with precision inclusion and a reduct procedure in which it overcomes the non‐monotony in forming tolerance classes when reducing an attribute from attribute set.Design/methodology/approachThrough introducing variable precision and limited tolerance relation in IDT, it constructs symmetric binary relation, dissimilar to non‐symmetric relation proposed by others, and then forms tolerance classes. It proposes a new reduction procedure with absolute value calculation to avoid tolerance classes being non‐monotone. Using variable inclusion, it obtains lower and upper approximations with noises.FindingsTolerance classes are not monotone with the reduction of attribute from attribute set in the proposed variable precision and limited tolerance relation, but it remains symmetry. Proposed reduction procedure with absolute value calculation is a new approach in adjudging whether a reduct equals to the original whole attribute set within a error range or not.Practical implicationsUsing variable precision and limited rough set model with variable inclusion to mine deep knowledge from IDT is a paradise in knowledge discovery in dealing with non‐determinative and vague problems.Originality/valueThe formation of symmetric tolerance relation is natural. The reduction procedure with absolute value calculation is new and not similar to those existed in literatures.
Some limit theorems of runs to the continuous‐valued sequence
Authors: Aihua Fan , Zhongzhi Wang , Fangqing Ding 
Published: October 2008

PurposeThe purpose of this paper is to give some limit theorems on ε‐neighborhood and ε‐increasing runs of continuous‐valued dependent random sequence. In the main result no assumptions are made concerning the random variables. As corollary a result on independent case is obtained.Design/methodology/approachThe crucial part of the proof is to construct a non‐negative supper‐martingale depending on a parameter by using the moment generating function, and then applying the Doob's martingale convergence theorem.FindingsThe upper and lower bounds of the deviations from the sums of arbitrary continuous‐valued random variables from the reference distributions are obtained.Research limitations/implicationsThe computation of asymptotic log‐likelihood ratio h(P|Q) is the main limitations, and it is difficult to obtain the rigorous bounds of the deviations.Practical implicationsA useful method to study the property for runs of dependent random sequence.Originality/valueThe new approach of study strong limit behavior for dependent random sequence.
Design, modeling and simulation of a novel directional MAC protocol for ad hoc networks
Authors: Jun Fan , Zhitang Li , Wei Nie 
Published: October 2008

PurposeThe purpose of this paper is to focus on alleviating the problems of both hidden and exposed terminal, which remain unsolved in many directional MAC protocols.Design/methodology/approachGPS is used to calibrate synchronization among the nodes, and directional antennas are used. In the protocol, different antenna mode and transmit power are used. The assertion signal and omni‐directional RTS are transmitted in omni‐directional mode, while directional CTS, directional RTS, DATA and ACK are transmitted in directional mode. With properly designed RTS‐CTS handshake, the protocol can make full use of spatial reuse of directional communication and enhance parallelism in data transmission.FindingsThe preliminary simulation results indicate that the protocol works well and achieves considerably high performance in both sparse and dense ad hoc networks.Research limitations/implicationsThe line of sight environment is the main limitation that the MAC protocol will be applied.Practical implicationsThe protocol is a very useful solution for employing directional antennas for ad hoc networks.Originality/valueThe MAC protocol can effectively alleviate the directional hidden and exposed terminal problems as well as node deafness. It can greatly improve throughput and achieve low‐medium access delay, making it suitable for ad hoc networks.
Construction of evaluation index system of national energy security based on CAS theory and PSR model
Authors: Shuqiong Fang , Baoan Yang , Yin Yu 
Published: October 2008

PurposeThe purpose of this paper is to provide a new mentality of constructing the evaluation index system on national energy security, in favor of analyzing its influencing factors and coupling relations thoroughly.Design/methodology/approachThe complex adaptive system (CAS) theory has provided one kind analysis method on modeling and simulation for question of the social economic system, which based on the adaptive agent and mutual interaction. In view of this, the authors' expect to use this kind of new research paradigm for reference, and construct the evaluation index systems on national energy security using the integration of CAS theory and pressure‐state‐response (PSR) conceptual model.FindingsConstructs a set of compound index system of “six parallel layers, gradually converge, six layers three dimensions three degrees.”Research limitations/implicationsThe evaluation index system on national energy security is in the discussion stage at present, and the comparatively systematic or accepted index system has not been established. So the further study on influencing factors and measurement indicator system based on multi‐dimension of national energy security, is the emphasis of the continued further research.Practical implicationsConstructing the evaluation index system on national energy security integrating PSR conceptual model from the perspective CAS.Originality/valueDivides the carrier of energy security problem's happening into three energy domains (non‐renewable energy), and introduces the theory and method of CAS to construct the agent layer to carry on the multi‐agent gambling analysis. Simultaneously separately analyses the coal security, the petroleum security as well as the natural gas security using the concept framework of PSR.
Theoretical analysis on coordinated development of urban transport system
Authors: Jian‐zhi Gao , Yao Zhao , He‐ling Ma , Yuan‐Xia Sun 
Published: October 2008

PurposeThe purpose of this paper is to expound the concept of the coordinated development of the transport system, and provide a quantitative method to support decision making in urban transportation development planning.Design/methodology/approachTo analyze the organic composition of urban transport system, research the meaning and mechanism of coordinated development of transport system. On the basis of researching relations of transport and external systems and its subsystems, to research quantitative theoretical model of the coordinated development and assessment of the transport system.FindingsEstablishing models needs to analyze the coordination among the various indices of subsystem, calculate the overall coordination between indices of the subsystem and all the indices of other subsystems, then inspect the coordinated development among subsystems.Research limitations/implicationsHow to design the indexes of the subsystem of urban transport system is the main limitation.Practical implicationsOffering theoretical foundation for coordinated development of urban transport system.Originality/valuePutting forward quantitative theoretical model on coordinated development of urban transport system, which lays a foundation for further study.
Studies on traffic effects of high‐speed ring road in city center
Authors: Zhiyuan Ge , Gao Ping 
Published: October 2008

PurposeTo establish a stimulating traffic model of ring road systems and study the traffic effects of ring road in the center of a large city, including the influence in vehicle's travel time and distance.Design/methodology/approachDifferent from the ring road systems in the west, Beijing and other big cities in China build ring roads in city center. However, it seems that those systems do not work because the traffic problem still exists when the number of cars in the city increased quickly in past five years. According to the real geographic topology network structure around Er Huan road in Beijing city center, a simplified simulated traffic model was built. Then, two indices of traffic effects, average travel time and path length were studied by comparing the two models with or without ring road.FindingsAccording to the simulation, although a high‐speed ring road shortens the travel time, it isolates the nature road network system and increases travel distance in the city center. Furthermore, it is uneconomic building a ring road to relieve traffic jams.Research limitations/implicationsOnly Er Huan road in Beijing traffic system was simulated in the model. A more complicated ring road system needs to be developed.Practical implicationsA useful model for optimizing traffic system with ring roads, and providing a support for doubting the strategy of developing ring road in city center district in many cities of China.Originality/valueThis is a new way by establishing the simulation model to analyze the scheme of ring road traffic systems. Furthermore, advice for current situation are concluded and it is useful for optimizing current traffic system.
Possibility and evidence theory‐based design optimization: an overview
Authors: He Li‐Ping , Qu Fu‐Zheng 
Published: October 2008

PurposeTo survey the approaches to design optimization based on possibility theory and evidence theory comparatively, as well as their prominent characteristics mainly for epistemic uncertainty.Design/methodology/approachOwing to uncertainties encountered in engineering design problems and limitations of the conventional probabilistic approach in handling the impreciseness of data or knowledge, the possibility‐based design optimization (PBDO), evidence‐based design optimization (EBDO) and their integrated approaches are investigated from the viewpoints of computational development and performance improvement. After that, this paper discusses the fusion technologies and an example of integrated approach in reliability to reveal the qualitative value and efficiency.FindingsIt is recognized that more conservative results are obtained with both PBDO and EBDO, which may be appropriate for design against catastrophic failure compared with the probability‐based design. Furthermore, the EBDO design may be less conservative compared with the PBDO design.Research limitations/implicationsHow to perfect already‐existing integration approaches in a more generally analytical framework is still an active domain of research.Practical implicationsThe paper is a holistic reference for design engineers and industry managers.Originality/valueThe paper is focused on decomposition strategies and fusion technologies, especially addressing epistemic uncertainty for large‐scale and complex systems when statistical data are scarce or incomplete.
Compensation analysis with additive DEA model
Authors: He Ping , Hua Zhongsheng 
Published: October 2008

PurposeTo develop a method of compensation analysis based on the additive data envelopment analysis model.Design/methodology/approachIt is a common assumption in current target setting literature that outputs of decision making units (DMUs) are generated simultaneously. In practice, outputs of DMUs may be generated consecutively, and targets of posterior outputs may need to be adjusted to keep a DMU efficient when the anterior output cannot reach the previously set output target. The proposed method determines a compensation rate among consecutive outputs, which is applied to keep a DMU efficient when the decrease of an anterior output exceeds its stability region. This compensation analysis is also extended to consecutive inputs.FindingsSufficient and necessary conditions for preserving efficiency upon output compensation are presented.Research limitations/implicationsThe compensation analysis when multiple anterior outputs decrease from their previously set targets is the main limitation, and needs further investigation.Practical implicationsThe paper is a useful method for decision maker to set target consecutively.Originality/valueThe paper defines a new target setting (adjusting) problem, in which targets of posterior outputs may need to be adjusted to keep a DMU efficient if an anterior output of the DMU decreases from its previously set target. Theoretical analyses of the compensation analysis are provided.
Research on internal credit ratings for listed companies
Authors: He Xubiao , Gong Pu , Xie Chunxun 
Published: October 2008

PurposeThe purpose of this paper is to simulate internal credit ratings based on stock market data and gain the credit information about listed companies.Design/methodology/approachAccording to the concept of default distance, default probability of listed companies is obtained from stock's price process based on generalized autoregressive conditionally heteroscedastic‐M model with the generalized error distribution, then credit ratings based on the default probability is built. Moreover, the model's validity is proved using the statistical tests and nonparametric receiver operating characteristic (ROC) curve method.FindingsApplication of the proposed methodology on data from Chinese stock market illustrates that default probability model can identify the credit risk of listed companies effectively using the statistical tests and nonparametric ROC curve method. The results from simulating credit ratings based on default probability are positive correlated with the corresponding results from Xinhua Far East China Ratings.Originality/valueThe internal credit ratings‐based default probability can reflect the change of credit quality for listed companies according to market information. For listed companies, especially which possibly suffer from accounting manipulations, the ratings will help investors and supervisors gain their credit information in time.
Six‐stage design framework
Authors: Hou Yuemin , Ji Linhong 
Published: October 2008

PurposeThe aim is to map function into structure step‐by‐step.Design/methodology/approachUsing bio‐inspired approach to investigate generic principle governing the formation of systems or artifacts by analogy with embryogenesis and using matrices and graphs to formalize design information.FindingsA six‐stage design framework is proposed and represented as six models: the function model which interprets design requirements, the surrogate model which transforms the subjective intention into the objective property, the property model which illustrates basic constituents of property, the specification model which specifies abstract properties by concrete property values or equations, the feature model which transforms properties into the feature of topology and materials of the structure, and the parameter model which parameterizes the detail description of structure. The transformations between stages are achieved mainly by means of induction, duality, decision making and nonlinear programming.Research limitations/implicationsBio‐inspired approach provides mechanisms to map function into structure.Practical implicationsA normative framework for engineering design and system design.Originality/valueThe framework distinguishes itself by biological approach, developmental process simulating to the development of embryo, induction and duality strategies to map stages, as well as mathematical representation.
Automated management and evaluation system for community health service
Authors: Hu HongPu , Liang WanNian , Guo Aimin , An XueMei , Zhou Ping , Wang JunLI , Lin Yi 
Published: October 2008

PurposeThe aim is to focus on an automated management and evaluation system to control the operation of community health service (CHS) efficiently.Design/methodology/approachOn the basis of analyzing existing health laws, regulations, CHS work situation, the authors established the execution method and supervision norm of management for CHS. They used Delphi expert consultation activity and analytic hierarchy process to construct weight coefficient allocation list and synthesize evaluation models: GI=∑I=1NCiPi. The authors synthesized computer technology to design corresponding software, and then completed the spot usage.FindingsThe automated management and evaluation system for CHS has been completed. The system possesses automated management function, automated evaluation function, searching function, the functions of supervision and statistics analysis as well as the feedback. Automated management includes guide and filling‐in, checking‐up, modifying and saving, converging, submitting, examining and approving, receiving, saving to file and issuing formation, etc. Automated evaluation can rank automatically synthesized index or any selected single criterion index in the order of either high to low or low to high. The feedback function is able to be used to convey timely the state of execution, and to offer the bases for further adjustment.Research limitations/implicationsThe automated evaluation makes the difficult evaluation work of daily supervision simple and maneuverable.Practical implicationsThe systemization and automation of CHS management can control effectively practical operation of CHS.Originality/valueThe study is the first to establish an automated compliance management and evaluation system for Chinese CHS.
Constructing automated installation application system of community health service based on FoxPro8.0
Authors: Hu HongPu , Liang WanNian , Wang YaDong , An XueMei , Zhou Ping , Li JunHong , Sang LiLi , Lin Yi 
Published: October 2008

PurposeTo present the mechanism, on which the first module was successfully designed – the automated installation application system, in the grand automated management and evaluation for community health service (CHS) sector of China.Design/methodology/approachThe automated installation application system is constructed on the platform of Visual FoxPro8.0. The construction consists of five steps. The first is to establish the “item.” The function of “the item” is to trace all procedures, forms, menus, and various databases, such as tabulated data, summary data, and other types of data. The second is to establish the customer log‐in module. This module needs to contain a roll book of authorized customers. The third is to construct the subsystem management interface. This interface includes: entering installation the application, modifying and saving and transferring out the information, searching, printing blank form and statement. The fourth is to establish a roll book of all forms and the database of all the forms. The fifth is to establish the main procedure, connecting all the modules in the working order.FindingsThe main advantage of the system is that it is helpful for the characteristics of speedy information importation, clear and straight to the point, as well as the secure and accurate data transfer.Originality/valueAutomated management and evaluation for CHS heavily depends on the initial activation and this initiation is started using the system of installation application.
Multi‐objective chaotic optimization algorithm and its application in optimal water resources deployment
Authors: Xianfeng Huang , Dongguo Shao , Wenquan Gu 
Published: October 2008

PurposeTo solve the water resources deployment problem which is a multi‐objective nonlinear problem with the characteristic of space‐time variability, involving many factors, such as economy, society, ecology, environment and projects.Design/methodology/approachCoupling the characteristic of multi‐objective with chaotic optimization, a multi‐objective chaotic optimization algorithm (MCOA) is proposed for optimal water resources deployment. The algorithm magnifies the chaotic series generated by logistic mapping to the feasible region, and seeks the best results by iterative comparison which can avoid the difficulties that objective functions and the constraints should be continuous and differentiable. MCOA is a global optimization method and has high efficiency.FindingsThe proposed algorithm is applied to the optimal deployment of water resources in a certain river basin. The rationality of results is verified by the entropy change theory. The results indicate that the optimal water resources deployment can be realized using the proposed algorithm in a more rational way.Research limitations/implicationsThe numbers and the bounds of variables are the main limitations which the algorithm will be applied.Practical implicationsA very useful optimization algorithm for optimal water resources deployment.Originality/valueThe paper highlights the new optimization algorithm for optimal water resources deployment due to the MCOA.