Integrated simulation framework for the process planning of ships and offshore structures

Recently, requests for accurate process planning using simulation have been increasing in many engineering fields, including the shipbuilding industry. To date, designers of shipyards have developed in-house simulation systems or used commercial systems such as the QUEST by Dassault system when requests for the simulation of process planning have occurred. However, these methods have some limitations. First, it requires a lot of time to develop a new in-house simulation system. In addition, it is hard to reuse previously developed systems when developing a new one and it is also hard for these to satisfy the various needs of shipyards effectively.     

Combining shared-coin algorithms

This paper shows that shared-coin algorithms can be combined to optimize several complexity measures, even in the presence of a strong adversary. By combining shared coins of Bracha and Rachman (1991) [10] and of Aspnes and Waarts (1996) [7], this yields a shared-coin algorithm, and hence, a randomized consensus algorithm, with O(nlog²n)$O\left(n{log}^{2}n\right)$ individual work and O(n²logn)$O(n^{2}logn)$ total work, using single-writer registers. This improves upon each of the above shared coins (where the former has a high cost for individual work, while the latter reduces it but pays in the total work), and is currently the best for this model.     

Change detection in desktop virtual environments: An eye-tracking study

It is common knowledge that attention is important for learning. We need to utilize attention in order to learn something efficiently and effectively. Similarly, we may also need to acquire familiarity with (i.e., learn) our surroundings in order to utilize our attention. In this study, learning is defined as a product of one’s exposure to natural visual stimuli. Using a virtual model of a natural scene, we investigate both attention and its relationship to learning, according to this definition. Specifically, our focus is the effect of environment familiarity on gaze direction. Our findings reveal that the factor of familiarity with one’s surroundings in virtual reality environments exerts a significant influence on peoples’ ability to detect a variety of specific changes that occur within scenes under their observation.     

网格计算中费用约束的最优时间调度算法

在网格资源处理速度和资源价格异构的网格环境下,讨论基于用户费用约束的最优时间调度问题,提出一种相应的调度算法,将该任务调度问题转化为线性规划问题,采用单纯形算法获得近似最优解,从而获得费用约束下资源的最优执行时间以及该任务的最小完成时间。仿真结果表明,该算法的性能优于其他同类算法。     

面向社会Agent的网络监测系统框架

在社会Agent理论的基础上,提出面向社会Agent的网络监测系统框架。结合软件复用的思想,根据网络监测数据,将该框架分为自治功能层、个体意识层和社会意识层的3层监测系统抽象模型。基于该框架设计的网页内容访问监测软件开发速度快、资源复用率高和鲁棒性强。     

基于UML的实验室预约管理系统设计

针对高等院校开放性实验管理上的不足,利用SSH框架、UML与SQL Server 2005等软件构建了基于UML的实验预约管理系统。利用JAVA语言与UML技术,实现了实验预约、审核、查询和管理等功能。该系统使实验室的开放管理科学化,仪器设备使用效能最大化。     

基于属性计算网络的动态手势识别的研究

基于视觉的动态手势识别既是当今人机交互系统研究的热点也是难点。该文提出了基于属性计算网络的识别方法对动态手势进行识别,与现有的识别方法相比,具有明显的特点和优点。首先利用肤色分离手部对象,然后跟踪手部对象,并对手部对象轮廓和运动轨迹抽取特征并建立对应的特征向量,最后将手部对象轮廓特征和运动轨迹特征进行加权组合,得出识别结果。本方法的特点和优点是识别分析速度较快,能够很好的满足人机交互系统实时性的需要,并且能够适应动态手势表达在速度和幅度上的差异性。     

浅谈云计算

云计算已经对IT界产生了十分重大的影响,是当前重要的研究领域。该文综述了当前云计算所采用的技术,剖析其背后的技术含义以及当前云计算参与企业所采用的云计算实现方案。通过此文可以了解云计算的当前发展状况以及未来的研究趋势。     

DSP外部Flash存储器在线编程的软硬件设计

详细介绍DSP与Flash存储器的两种硬件接口方式及在线编程,分析了两种硬件接口方式下在线编程的区别,给出了相应的在线编程核心代码并在实际电路上测试通过,可作为DSP嵌入式系统设计的参考。     

Flexible amorphous‐silicon non‐volatile memory

Abstract— The development of a flexible, rewritable, non‐volatile memory (NVM) that is implemented on a standard, low‐temperature a‐Si:H process without additional mask steps is reported. This NVM is a part of a flexible‐display system. Each NVM cell is composed of differentially configured thin‐film‐transistors (TFTs). The cell reads out one of two stable states depending on the relative threshold voltages of the differentially configured TFTs. Information is stored in each cell by increasing the threshold voltage of one differential TFT or the other, utilizing the well‐known electrical‐stress degradation intrinsic to a‐Si:H TFTs. The stored information is retained indefinitely with no applied power. A test array of individually addressable NVM cells has been successfully fabricated and tested on flexible stainless‐steel substrates. Read and write operation, as well as preliminary reliability measurements, are described. The design is readily scalable to large memory arrays.