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1、-具有依赖于总人数的有效接触率的生态-传染病模型刘 妍, 王美娟, 鲁铁军(上海理工大学 理学院, 上海 200093)摘要: 研究了具有依赖于总人数的有效接触率的生态-传染病模型. 建立了一个具有依赖于总人数的有效接触率的模型,在模型的不变子集上先求出阈值R0的表达式. 如果R01,则疾病消除平衡点全局渐近稳定;如果R01,则存在唯一的传染病平衡点,且是全局渐近稳定的. 对带有双线性传染率和标准传染率的两个模型作了相应的讨论.关键词: 传染病模型; 有效接触率; 阈值; 全局渐近稳定性Ecology-epidemic model considering effective contact r
2、ate dependent on total number of personsLIU Yan, WANG Mei-juan, LU Tie-jun(College of Science, University of Shanghai for Science and Technology, Shanghai 200093, China)Abstract: An ecology-epidemic model which takes into account the effective contact rate relying on the total number of persons is p
3、roposed and the expression of the threshold value R0 is extracted on the invariant subset. If R01, then the disease-free equilibrium point is of global asymptotic stability; if R01, then exists the only epidemic equilibrium point, which is of global asymptotic stability. Corresponding discussions ar
4、e made regarding the models of both bilinearity contagiosity and standard contagiosity.Key words: epidemic model; effective contact rate; threshold value; global asymptotic stability双目标旅行商问题及其蚂蚁算法实验研究王洪刚, 李高雅, 马 良(上海理工大学 管理学院, 上海 200093)摘要: 对双目标旅行商问题设计了基于Pareto概念的多目标蚂蚁算法. 借助于算法的全局搜索能力,在整个解空间内快速搜索多目标
5、组合的Pareto有效解,并利用多目标蚂蚁算法维持解集多样性的特点,使搜索到的Pareto解在前沿均匀分布. 经大量算例求解验证了其有效性,该算法具有较好的通用性.关键词: Pareto解集; 双目标旅行商问题; 蚂蚁算法Experimental studies on the ant algorithm for bi-objective traveling salesman problemWANG Hong-gang, LI Gao-ya, MA Liang(Business School, University of Shanghai for Science and Technology,
6、Shanghai 200093, China)Abstract: A Pareto concept based multi-objective ant algorithm for the bi-objective TSP is proposed. Taking advantage of the capability of efficient global searching and maintenance of diversity of ant algorithm, the feasible region can be quickly explored and the Pareto solut
7、ions are found uniformly distributed on the frontier. Experiment results show the effectiveness and validity of the algorithm.Key words: Pareto solutions; bi-objective traveling salesman problem; ant algorithm基于多分辨率分析和改进离散余弦变换的音频水印算法马琳琳, 李星野(上海理工大学 管理学院, 上海 200093)摘要: 提出了一种基于多分辨率分析的音频水印算法. 首先通过对音频信号
8、进行小波分解得到信号的时变低频分量,然后通过扩频和改进离散余弦变换将水印信息分散嵌入低频分量;最后通过误差修正获得较高的水印提取准确率. 该算法增大了水印信号的嵌入量,在保证水印安全性和隐蔽性的同时,对常见的信号处理还具有较好的鲁棒性.关键词: 音频水印; 多分辨率分析; 改进离散余弦变换; 扩频Algorithm for audio watermarking based on multiresolution analysis and modified discrete cosine transformMA Lin-lin, LI Xing-ye(Business School, Univer
9、sity of Shanghai for Science and Technology, Shanghai 200093, China)Abstract: An algorithm for audio watermarking based on multiresolution analysis is proposed. The algorithm deals with the audio signal using a wavelet decomposition to get the time-variant low frequency components of the audio signa
10、l. Then, the spectrum of the low frequency components is spread and the watermark is embedded into the low frequency components spread by using the MDCT (modified discrete cosine transform). The better veracity of extracting the watermark is assured by using error correction. By using the method, th
11、e amount of the embedded watermark bits is increased and the security and imperceptibility of the embedded watermark are ensured. In the mean time, the watermarking scheme is also robust to the common signal processing.Key words: audio watermarking; multiresolution analysis; modified discrete cosine
12、 transform; spectrum spread基于智能体的大批量定制体系结构及协同方法唐卫宁, 徐福缘(上海理工大学 管理学院, 上海 200093)摘要: 为满足大批量定制运营过程中动态特性和协同管理的要求,本文构建了一个多智能体的大批量定制体系结构,描述了大批量定制下各个智能体的规范,提出了3层协同模型,使用局部全局计划来解决大批量定制协同问题,并介绍了该方法在大批量定制协同的实例应用.关键词: 大批量定制; 供应链协同; 多智能体系统; 局部全局计划Mass customization architectures and coordination approach based o
13、n agentsTANG Wei-ning, XU Fu-yuan(Business School, University of Shanghai for Science and Technology, Shanghai 200093, China)Abstract: In order to satisfy the requirements of dynamic characteristics and coordination management in the process of mass customization, the paper presents a multi-agents s
14、ystem architecture for mass customization (MC) and in particular, shows precisely what specific agents should be in MC environments. A three-tier model of coordination is suggested and partial global plans for addressing the coordination problem are utilized. An application example for MC coordinati
15、on based on partial global plans is provided.Key words: mass customization; supply chain coordination; multi-agent system; partial global planning供需网的IDEF0模型构建及MIFPN模型转换刘彩虹, 徐福缘(上海理工大学 管理学院, 上海 200093)摘要: 将IDEF0模型与Petri网相结合,对多信息流系统进行功能描述和动态行为关系分析,提出了多信息流Petri网(MIFPN)的定义,给出了IDEF0到MIFPN转换的规则方法. 在此基础上实
16、现对多功能开放型企业供需网系统的功能分析与设计.关键词: IDEF0方法; 多信息流Petri网; 供需网IDEF0 model constitution for SDN and transform from IDEF0 model to MIFPN modelLIU Cai-hong, XU Fu-yuan(Business School, University of Shanghai for Science and Technology, Shanghai 200093, China)Abstract: According to the basic theories of IDEF0 and Petri nets, the definition of the multi-information flow Petri nets is p
