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一种基于ebXML规范构建组件库的方法

武汉大学学报(理学版) 2005年第1期51卷 87-90页

作者：杜德慧应时何克清武汉大学软件工程国家重点实验室武汉大学软件工程国家重点实验室湖北武汉430072武汉大学计算机学院湖北武汉430072

针对软组件的管理要求,本文在扩充 OASIS ebXML 注册信息模型的基础上,提出了一种基于ebXML注册库和存储库标准,管理软组件资源的方案,并给出了该软组件库的组件注册框架结构.该方案符合OASIS的ebXML注册信息模型规范和ebXML注册服务规... 详细信息

针对软组件的管理要求,本文在扩充 OASIS ebXML 注册信息模型的基础上,提出了一种基于ebXML注册库和存储库标准,管理软组件资源的方案,并给出了该软组件库的组件注册框架结构.该方案符合OASIS的ebXML注册信息模型规范和ebXML注册服务规范,具有通用性和推广应用价值并举例说明了组件注册框架的使用过程.

关键词：基于组件的软件工程软组件 ebXML注册库 ebXML存储库

Evaluation Method of Web Site Structure Based on Web Structure Mining

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wuhan university Journal of Natural Sciences 2003年第3A期8卷 791-796页

作者： Li Jun\|e 1 , Zhou Dong\|ru 2 1. computer Center,wuhan university, wuhan 430072, hubei, china 2. school of computer,wuhan university, wuhan 430072, hubei,china computer Center Wuhan University Wuhan Hubei China school of computer Wuhan University Wuhan Hubei China

The structure of Web site became more complex than before. During the design period of a Web site, the lack of model and method results in improper Web structure, which depend on the designer's experience. From the point of view of software engineering, every period in the software life must be evaluated before starting the next period's work. It is very important and essential to search relevant methods for evaluating Web structure before the site is completed. In this work, after studying the related work about the Web structure mining and analyzing the major structure mining methods (Page\|rank and Hub/Authority), a method based on the Page\|rank for Web structure evaluation in design stage is proposed. A Web structure modeling language WSML is designed, and the implement strategies for evaluating system of the Web site structure are given out. Web structure mining has being used mainly in search engines before. It is the first time to employ the Web structure mining technology to evaluate a Web structure in the design period of a Web site. It contributes to the formalization of the design documents for Web site and the improving of software engineering for large scale Web site, and the evaluating system is a practical tool for Web site construction.

关键词： web structure mining page\|rank web structure evaluation modeling language for web structure

Integrating Audio-Visual Features and Text Information for Story Segmentation of News Video

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wuhan university Journal of Natural Sciences 2003年第4A期8卷 1070-1074页

作者： Liu Hua-yong, Zhou Dong-ru  school of computer,wuhan university,wuhan 430072, hubei, china school of computer Wuhan University Wuhan Hubei China

Video data are composed of multimodal information streams including visual, auditory and textual streams, so an approach of story segmentation for news video using multimodal analysis is described in this paper. The proposed approach detects the topic-caption frames, and integrates them with silence clips detection results, as well as shot segmentation results to locate the news story boundaries. The integration of audio-visual features and text information overcomes the weakness of the approach using only image analysis techniques. On test data with 135 400 frames, when the boundaries between news stories are detected, the accuracy rate 85.8% and the recall rate 97.5% are obtained. The experimental results show the approach is valid and robust.

关键词： news video story segmentation audio-visual features analysis text detection

A PRICE-SETTING NEWSVENDOR MODEL UNDER CVAR DECISION CRITERION WITH EMERGENCY PROCUREMENT

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Journal of Systems Science and Systems Engineering 2010年第1期19卷 85-104页

作者： Minghui XU school of Economics and Management,wuhan university,wuhan 430072,china school of Economics and Management Wuhan University Wuhan China

In this paper, we consider a newsvendor model in which a risk-averse manager faces a stochastic price-dependent demand in either an additive or a multiplicative form. An emergency purchase option is allowed after the realization of demand to satisfy the units that are short. By adopting Conditional value-at-risk （CVaR） as the decision criterion, we aim to investigate the optimal pricing and ordering decisions, and the effects of parameter changes in such a setting. We provide sufficient conditions for the uniqueness of the optimal policy for both demand models. We perforl~, comparative statics analysis to show how the optimal pricing and ordering decision behaves when changing parameters. We also compare our results with those of the newsvendor with a general utility function and with CVaR criterion under lost sales assumption. Our key results include：（i） For both demand models, the optimal selling price is decreasing in risk aversion. Hence, the optimal price of a risk-averse newsvendor is not greater than the optimal price of a risk-neutral newsvendor. （it） In contrary to the lost sales case, for the multiplicative demand model, the optimal order quantity may not be monotonic in risk aversion. Consequently, the optimal risk-averse order quantity may be lower or higher than the optimal risk- neutral counterpart. （iii） For the additive model, the optimal order quantity is strictly increasing in the emergency purchase price, while for the multiplicative model the optimal order quantity has no such a monotonic property. Some numerical examples are conducted to verify our claims and gain more insights about the risk-averse decision-making behaviors.

关键词： Newsvendor model inventory pricing risk aversion conditional value-at-risk

A Distributed Routing and Wavelength Assignment Algorithm for Online Multicast in All-Optical WDM Networks

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wuhan university Journal of Natural Sciences 2002年第1期7卷 27-36页

作者： Huang Chuan-he, Chen Xin-meng, Jia Xiao-hua school of computer, wuhan university, wuhan 430072, hubei, china school of computer Wuhan University Wuhan Hubei China

Routing and wavelength assignment for online real-time multicast connection setup is a difficult task due to the dynamic change of availabilities of wavelengths on links and the consideration of wavelength conversion delay in WDM networks. This paper presents a distributed routing and wavelength assignment scheme for the setup of real-time multicast connections. It integrates routing and wavelength assignment as a single process, which greatly reduces the connection setup time. The proposed routing method is based on the Prim’s MST (Minimum Spanning Tree) algorithm and the K-restricted breadth-first search method, which can produce a sub-minimal cost tree under a given delay bound. The wave-length assignment uses the least-conversion and load balancing strategies. Simulation results show that the proposed algorithm is suitable for online multicast connection establishment in WDM networks.

关键词： Key words WDM networks routing and wavelength assignment multicast routing delay bounded routing

Electronic Structure of Doped Trans-Polyacetylene

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wuhan university Journal of Natural Sciences 2002年第1期7卷 51-53页

作者： Ren Da-zhi 1,2, Zhuang Wei 2, Wang Jun 2 1. wuhan university Journals Press,wuhan 430072,hubei,china 2. school of Physics and Technology, wuhan university, wuhan 430072,hubei,china wuhan university Journals Press Wuhan Hubei China school of Physics and Technology Wuhan University Wuhan Hubei China

The behavior of electronic structures of doped trans-polyacetylene is revealed by a simple method. (C24H26)+n is used to simulate p-type doped trans-polyacetylene at various doping concentrations. The electronic structure is calculated, by CNDO/2 method. These calculations show that at low doping level, the decrease of electronic energy compensates the increase of elastic energy, thus the bond alternation exists, and the charge carriers are solitons. When doping level is high, the increase of elastic energy is larger than the decrease, of electronic energy, the bond alternation disappears, solitons no longer exist, and polyacetylene is in a metalic state.

关键词： trans polyacetylene CNDO/2 electronic structure doped

Non-Homogeneous Riemann Boundary Value Problem with Radicals

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wuhan university Journal of Natural Sciences 2002年第4期7卷 379-382页

作者： Lu Jian-ke school of Mathematics and Statistics,wuhan university,wuhan 430072, hubei,china school of Mathematics and Statistics Wuhan University Wuhan Hubei China

The solution of the non-homogeneous Riemann boundary value problem with radicals (1. 2) together with its condition of solvability is obtained for arbitrary positive integersp andq, which generalizes the results for t... 详细信息

关键词： Riemann boundary value problem branch points of radicals index order at infinity sectionally holomorphic functions

Mathematical Model of the Identical Slope Surface

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wuhan university Journal of Natural Sciences 2002年第1期7卷 54-58页

作者： Hu Jian-guo 1, Chen yue-ping 2 1. school of Urban Studies,wuhan university,wuhan 430072, hubei, china 2.College of Politics and Administration,wuhan university, wuhan 430072,hubei, china school of Urban Studies Wuhan University Wuhan Hubei China College of Politics and Administration Wuhan University Wuhan Hubei China

The formation of the identical slope surface and the method of construction are discussed. On the basement of building the parameter equation of variable-radius circle family envelope, the frequently used parameter equation of the identical slope surface of the top of taper moving along column helix, horizental arc and line is built. The equation can be used to construct the identical slope surface’s contours, gradient lines and three dimensional figures correctly.

关键词： Key words identical slope surface family of circles mathematical model envelope elevation projection contours

DOUBLE Φ-FUNCTION INEQUALITY FOR NONNEGATIVE SUBMARTINGALES

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Chinese Annals of Mathematics,Series B 2000年第2期21卷 211-216页

作者： MEI TAO(College of Mathematics and computer Sciences, wuhan university, wuhan 430072, china.) LIU PEIDE(College of Mathematics and computer Sciences, wuhan university, wuhan 430072, china.) College of Mathematics and computer Sciences Wuhan University Wuhan 430072 China

The authors establish a kind of inequalities for nonnegative submartingales which depend on two functions　ψ and ψ, and obtain the equivalent conditions for　Φ and ψ such that this kind of inequalities holds. In t... 详细信息

关键词： Matingale Nonnegative submartingale Maximal function Φ-function inequality