AIS系统协议栈的研究与实现

根据通用船载自动识别系统(AIS)的协议栈,给出了一种基于链路层、网络层和传输层的嵌入式系统AIS系统平台设计,详细研究了其基于ARM+FPGA的硬件设计和基于μC/OS-Ⅱ操作系统的软件设计.     

宁波港AIS岸站信息分发系统的设计与实现

船舶自动识别系统(简称AIS),是用于水上交通联络和指挥的岸-船、船-岸以及船-船之间的通讯、导航系统。针对宁波港AIS岸站系统建成后如何更好地利用这些AIS数据,使其能更好地为港口生产服务,本文主要研究了基于AIS岸站的数据信息分发系统的设计和实现,该系统提高了岸站管理府门对数据信息分发的针对性,提高了运行效率,具有很高的使用价值。     

基于Mapinfo电子海图和AIS的船舶导航系统的研究与实现

本文从技术实现角度出发，探讨了基于Mapinfo格式的电子海图以及AIS（Automatic Identification System，船舶自动识别系统）技术和性能指标。在此基础上，设计了基于Mapinfo电子海图和AIS通信的船舶导航系统，并在辅助船舶航行中得以应用。     

基于Flask和Vue的AIS数据分析系统设计与开发

为了更好的利用AIS数据,使用前后端分离的方法设计和开发了AIS数据分析系统,在本文中着重对此系统的整体架构和技术路线进行介绍。系统基于Python语言的Flask框架搭建后端数据和计算服务,前端基于Vue.js框架搭建页面,最终实现了基础信息展示、数据统计和可视化及聚类分析分析等功能。     

改进AIS在课程推荐系统中的应用

通过引入人工免疫系统,并加以相应改进,该文设计并实现了基于改进AIS算法的协同式过滤推荐系统,提供了一个将基于用户与基于条目的推荐机制有机结合起来的一站式推荐架构,同时赋予了CF在线增量学习的能力.     

改进AIS在课程推荐系统中的应用

通过引入人工免疫系统,并加以相应改进,该文设计并实现了基于改进AIS算法的协同式过滤推荐系统,提供了一个将基于用户与基于条目的推荐机制有机结合起来的一站式推荐架构,同时赋予了CF在线增量学习的能力。     

AIS别墅全智能监控方案

工程概述针对别墅和高档住宅区的实际安全要求,创意视讯科技有限公司基于公司对智能监控系统设计的理念,将AIS主动智能监控系统应用于别墅和高档住宅区。AIS主动智能监控系统将人脸侦测、人体行为检测、黑名单比对、危险地段告警、入侵检测等先进技术运用于智能化系统的设计和建设中,通过有效的信息传输网络、系统优化配置和综合应用,向住户提供先进的安全防范、信息服务等方面的功能。     

基于共享内存管理的海量AIS目标态势显示系统

为了突破指挥自动化系统在海量AIS目标态势处理与显示方面的性能瓶颈,本文介绍了一种基于共享内存管理的海量AIS目标态势显示系统,系统基于共享内存管理、按需请求和局部更新、LOD分级显示的理念,从大容量态势目标的信息特征出发,以共享内存数据库、显示处理服务化为技术基础,结合基于空间网格的数据动态调度、目标聚合计算以及客户端分级显示策略等技术,实现了海量AIS目标的高性能态势显示。     

基于AIS CLASS B标准的通信协议的设计

价格低廉的B类自动识别系统备受小型船舶青睐,以兼容AIS CLASS B标准的自动识别系统作为研究对象,设计了以CS－TDMA协议为依据的物流信息传输的协议部分。系统的AIS功能和其他种类的AIS设备功能基本相同,区别在于对时隙的占用和同步方式等方面。系统只有在确认自身发射信息所占用的时隙不会影响其他种类AIS设备通信的情况下才会发射信息,并且确认系统发射的信息不能超过一个标称时隙。     

基于虚拟仪器的AIS仿真系统设计

针对AIS设备的功能特点,利用虚拟仪器技术设计并开发了AIS仿真系统.该系统包含登录Ⅵ和主Ⅵ两大模块,在主Ⅵ模块中包括时间计算、暗码解算、人员落水标记、报文记录复视、目标标记等多个子模块,系统能够在计算机上实现AIS的模拟仿真运行.     

Only connect: teaching, technology and telesis

Abstract This paper describes an approach to the design of interactive multimedia materials being developed in a European Community project. The developmental process is seen as a dialogue between technologists and teachers. This dialogue is often problematic because of the differences in training, experience and culture between them. Conditions needed for fruitful dialogue are described and the generic model for learning design used in the project is explained.     

European Community policy and the market

Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven.     

一种自适应子融合集成多分类器方法

融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。     

Avoiding semantic and temporal gaps in developing software intensive systems

Development of software intensive systems (systems) in practice involves a series of self-contained phases for the lifecycle of a system. Semantic and temporal gaps, which occur among phases and among developer disciplines within and across phases, hinder the ongoing development of a system because of the interdependencies among phases and among disciplines. Such gaps are magnified among systems that are developed at different times by different development teams, which may limit reuse of artifacts of systems development and interoperability among the systems. This article discusses such gaps and a systems development process for avoiding them.     

Designing economic np control charts: A programmed simulation approach

This paper presents control charts models and the necessary simulation software for the location of economic values of the control parameters. The simulation program is written in FORTRAN, requires only 10K of main storage, and can run on most mini and micro computers. Two models are presented - one describes the process when it is operating at full capacity and the other when the process is operating under capacity. The models allow the product quality to deteriorate to a further level before an existing out-of-control state is detected, and they can also be used in situations where no prior knowledge exists of the out-of-control causes and the resulting proportion defectives.     

The development of robot art

Going through a few examples of robot artists who are recognized worldwide, we try to analyze the deepest meaning of what is called “robot art” and the related art field definition. We also try to highlight its well-marked borders, such as kinetic sculptures, kinetic art, cyber art, and cyberpunk. A brief excursion into the importance of the context, the message, and its semiotics is also provided, case by case, together with a few hints on the history of this discipline in the light of an artistic perspective. Therefore, the aim of this article is to try to summarize the main characteristics that might classify robot art as a unique and innovative discipline, and to track down some of the principles by which a robotic artifact can or cannot be considered an art piece in terms of social, cultural, and strictly artistic interest. This work was presented in part at the 13th International Symposium on Artificial Life and Robotics, Oita, Japan, January 31–February 2, 2008     

Explanation and prediction: an architecture for default and abductive reasoning

Although there are many arguments that logic is an appropriate tool for artificial intelligence, there has been a perceived problem with the monotonicity of classical logic. This paper elaborates on the idea that reasoning should be viewed as theory formation where logic tells us the consequences of our assumptions. The two activities of predicting what is expected to be true and explaining observations are considered in a simple theory formation framework. Properties of each activity are discussed, along with a number of proposals as to what should be predicted or accepted as reasonable explanations. An architecture is proposed to combine explanation and prediction into one coherent framework. Algorithms used to implement the system as well as examples from a running implementation are given.     

Three Process Perspectives: Organizations, Teams, and People

This paper provides the author's personal views and perspectives on software process improvement. Starting with his first work on technology assessment in IBM over 20 years ago, Watts Humphrey describes the process improvement work he has been directly involved in. This includes the development of the early process assessment methods, the original design of the CMM, and the introduction of the Personal Software Process (PSP)^SM and Team Software Process (TSP){^SM}. In addition to describing the original motivation for this work, the author also reviews many of the problems he and his associates encountered and why they solved them the way they did. He also comments on the outstanding issues and likely directions for future work. Finally, this work has built on the experiences and contributions of many people. Mr. Humphrey only describes work that he was personally involved in and he names many of the key contributors. However, so many people have been involved in this work that a full list of the important participants would be impractical.     

基于复小波噪声方差显著修正的SAR图像去噪

提出了一种基于复小波域统计建模与噪声方差估计显著性修正相结合的合成孔径雷达(Synthetic Aperture Radar,SAR)图像斑点噪声滤波方法。该方法首先通过对数变换将乘性噪声模型转化为加性噪声模型,然后对变换后的图像进行双树复小波变换(Dualtree Complex Wavelet Transform,DCWT),并对复数小波系数的统计分布进行建模。在此先验分布的基础上,通过运用贝叶斯估计方法从含噪系数中恢复原始系数,达到滤除噪声的目的。实验结果表明该方法在去除噪声的同时保留了图像的细节信息,取得了很好的降噪效果。     

How do children do mathematics with LOGO?

Abstract  This paper considers some results of a study designed to investigate the kinds of mathematical activity undertaken by children (aged between 8 and 11) as they learned to program in LOGO. A model of learning modes is proposed, which attempts to describe the ways in which children used and acquired understanding of the programming/mathematical concepts involved. The remainder of the paper is concerned with discussing the validity and limitations of the model, and its implications for further research and curriculum development.