随机仓库布局问题模型与算法研究

通过讨论随机条件下仓库布局问题．建立了随机仓库布局问题机会约束规划模型，并设计出基于随机模拟的禁忌搜索算法求解模型，最后利用算例来验证算法的有效性。     

Agent-based simulation approach for disaster rescue using active RFID

After the 2004 earthquake in Japan’sNiigata Prefecture, there were many difficulties finding the victims. The earthquake caused a wired network disconnection. In addition, fixed-phone and cell-phone service systems crashed due to the rapid increase in the volume of communications. The systems’ collapse was due to the large number of users who were worried about the safety of their relatives. The same situation happened during Hurricane Katrina in the USA. Reflecting on these situations, the Japanese Ministry of Internal Affairs and Communications is trying to adopt several methods to correct these communications problems. Although these methods have not been disclosed precisely yet, we think that a predominant goal of one of the methods is most likely to find victims using RFIDs (Radio Frequency Identification) with computer sensors. To do this, the RFID method would have to be incorporated in the following ways: 1) by scattering sensor devices from helicopters when a large-scale disaster such as an earthquake occurs, 2) by making RFIDs self-organized into a network, and 3) by making the self-organized network pinpoint the position of victims. A certain amount of field-testing may be necessary to confirm the effects of this plan. However, such testing requires a great amount of time and high costs. Therefore, we adopt an agent-based simulation for such a test. In this paper, we pay specific attention to a simple and assured algorithm for discovering victims using RFIDs. First, we explain our method to confirm the location of victims. Second, we explain our method for pinpointing the position of victims using trilateration. Finally, we present our simulation results.     

国际贸易应用型人才培养问题探讨

地方应用型本科院校如何针对自身实际,突出专业特色,培养应用型人才,是目前有关方面人士着力探讨的问题。文中从国际贸易人才培养的角度,提出以"模拟实验"、"外贸单证实务操作"、"校企互动"等为特色的专业规划,成为应用型人才培养过程中的重要环节和现实手段的观点,以此带动整体专业建设水平的提高。     

新一代航天测量船导航系统信息融合技术

分析了我国航天测量船导航系统的优缺点，提出了一种基于分散化滤波理论的联邦卡尔曼滤波体系结构（FKF），并研究了其最优融合估计算法和实时性。仿真结果表明，它可以有效地提高组合导航系统的精度和容错性能。最终的设计方案已成功应用于一种航天测量船组合导航系统中。     

Transportation cost changes with statewide school district consolidation

This article studies the relationship between school district size and bus transportation costs, and estimates the change in such costs when a statewide policy of consolidation is pursued. To explore this relationship, we develop a multiple-objective model and solution procedure that combines a geographic aggregation and bus routing heuristic to generate consolidation scenarios. The heuristic was developed to explicitly consider efficiency, effectiveness, and equity objectives, and can be applied in both urban and rural states. The scenarios will generate average statewide bus transportation costs. As applied to the State of Iowa, within the legislature's proposed range of consolidation of 500-1000 students, it was found that transportation operational and capital cost increases range from 0.6 to 10.6 percent and 0.7 to 7.7 percent, respectively.     

基于System View的256QAM信号调制与解调的仿真实现

在介绍正交振幅调制(QAM)信号的调制、解调原理的基础上,以相对比较复杂的256QAM为例,对QAM信号的频带利用率和误码率性能进行了分析,给出了用动态系统仿真和分析软件SystemView进行系统仿真的具体设置,并分析了仿真结果。     

ERP沙盘实训课程的教学研究

EPR沙盘实训课程采用体验式教学方式，可以调动学生学习的积极性与主动性，有利于高职人才培养目标的实现，是一种值得推广的实践教学模式。本文在分析该课程教学特点的基础上，提出该课程进行大众化教学的方案，并对相关的几个问题进行了探讨。     

A STATE-SPACE PARTITIONING METHOD FOR PRICING HIGH-DIMENSIONAL AMERICAN-STYLE OPTIONS

The pricing of American-style options by simulation-based methods is an important but difficult task primarily due to the feature of early exercise, particularly for high-dimensional derivatives. In this paper, a bundling method based on quasi-Monte Carlo sequences is proposed to price high-dimensional American-style options. The proposed method substantially extends Tilley's bundling algorithm to higher-dimensional situations. By using low-discrepancy points, this approach partitions the state space and forms bundles. A dynamic programming algorithm is then applied to the bundles to estimate the continuation value of an American-style option. A convergence proof of the algorithm is provided. A variety of examples with up to 15 dimensions are investigated numerically and the algorithm is able to produce computationally efficient results with good accuracy.     

A Formal Study of Distributed Meeting Scheduling

Automating routine organizational tasks, such as meeting scheduling, requires a careful balance between the individual (respecting his or her privacy and personal preferences) and the organization (making efficient use of time and other resources). We argue that meeting scheduling is an inherently distributed process, and that negotiating over meetings can be viewed as a distributed search process. Keeping the process tractable requires introducing heuristics to guide distributed schedulers' decisions about what information to exchange and whether or not to propose the same tentative time for several meetings. While we have intuitions about how such heuristics could affect scheduling performance and efficiency, verifying these intuitions requires a more formal model of the meeting schedule problem and process. We present our preliminary work toward this goal, as well as experimental results that validate some of the predictions of our formal model. We also investigate scheduling in overconstrained situations, namely, scheduling of high priority meetings at short notice, which requires cancellation and rescheduling of previously scheduled meetings. Our model provides a springboard into deeper investigations of important issues in distributed artificial intelligence as well, and we outline our ongoing work in this direction.     

TACAN信号处理的MATLAB仿真技术分析

介绍了TACAN系统的信号处理及其计算机仿真.利用MATLAB对TACAN信号的中频数字化及基带信号处理过程进行仿真分析,介绍了同相正交积分数字锁相测方位算法并对其进行了仿真验证.