基于BCB & MapX的无人机航路规划与监控系统实现

给出了无人机监控系统的模块构成，在分析模块要素的基础上，给出了在BCB下实现无人机任务规划与监控系统的方法。通过在BCB中引入MapX控件，提高系统对GIS信息的监控处理能力；建立了无人机航路优化的VORONOI图数学模型，通过最小化航路代价的Dijkstar算法，在MapX中实现了最优航路的搜索，并针对MapX二次开发中的少量复杂图标的动态标绘、动态更新的关键技术问题提出了一套有效的解决的方案，给出了其实现的核心代码。     

基于BCB & MapX的无人机航路规划与监控系统实现

给出了无人机监控系统的模块构成,在分析模块要素的基础上,给出了在BCB下实现无人机任务规划与监控系统的方法.通过在BCB中引入MapX控件,提高系统对GIS信息的监控处理能力;建立了无人机航路优化的VORONOI图数学模型,通过最小化航路代价的Dijkstar算法,在MapX中实现了最优航路的搜索,并针对MapX二次开发中的少量复杂图标的动态标绘、动态更新的关键技术问题提出了一套有效的解决的方案,给出了其实现的核心代码.     

一种基于GIS组件的矢量符号设计和标绘的通用方法

在GIS工程建设和软件开发中,所基于的GIS开发平台（如ArcInfo、MapInfo等）提供的符号往往不能满足不同用户的需要。因此,开发过程必然涉及到矢量符号设计和标绘的问题。本文对面向对象的矢量符号设计方法进行了探讨,并重点对矢量符号在GIS组件的标绘中所涉及的技术方法进行了论述。     

基于Web服务的态势标绘系统相关技术研究

为了实现态势标绘系统服务化的需求,在详细研究了浏览器端的图形绘制以及服务器发布服务的技术后,提出了基于Web Service的服务化态势标绘系统.态势标绘系统的核心是标号的绘制,服务化需要解决标号绘制的服务化.服务化的态势标绘系统需要提供接口,使采用不同绘图技术的客户端能够调用接口实现标号绘制.服务化的态势标绘系统需要能够快速响应用户的操作,为了验证采用Web Service技术的服务化态势标绘系统能否及时响应用户的操作,搭建了原型系统进行测试,测试结果表明在局域网的环境下能满足响应的需求.     

动态军标符号的实现方法研究

针对战场指挥系统中军标符号编辑和标绘模块里的难点--动态军标符号的生成问题进行了研究.并着重就动态军标生成中的关键--控制点的生成问题针对两类不同的动态军标符号给出了不同的控制点生成方法.实验结果表明此方法能够方便快捷的实现动态军标符号,较好的满足了实战中对动态军标符号编辑与标绘的需要.     

某型飞行模拟器综合显示仿真系统设计

本文针对某型航空装备的综合显示系统的模拟需要,运用仿真软件设计开发出一套显示仿真模拟系统平台,该系统平台采用Visualc＋＋开发环境、基于OpenGL图形库和MapX组件进行软件开发,可模拟实现飞行座舱的各系统工作画面,是该型装备模拟器中的重要人机交互部分。     

基于XML的态势图协同标绘系统设计与实现

传统协同标绘系统采用基于标绘符号库的标绘结果网络分发传输方式,信息维护困难,可靠性受网络性能的影响。因此,文章提出了一种采用XML保存标绘信息的方法,设计并实现了一个基于XML的态势图协同标绘系统。     

基于MapX的空间查询应用

空间查询是GIS应用系统的基本功能之一，空间查询的功能和效率是GIS应用系统的重要指标。本文讨论了利用MapX实现空间查询的方法，包括基本的图形与属性数据互查和基于空间关系的复杂查询，并给出了详细的实现方法和流程。     

COMGIS在地铁站内安全管理中的设计与实现

针对地铁站内设施信息及MapX的特点,详细设计了基于MapX＋SQL Server＋VB的地铁站内地理信息系统,实现了对地站内信息的实时监控及管理.     

基于MapX的公交网络最优路径研究

Mapx是Maplnfo公司向用户提供的具有强大地图分析功能的ActiveX控件产品。分析和讨论了公交网络的特点及公交最优路径算法,充分利用MapX控件的属性和方法以及面向对象语言的灵活性对公交网络最优路径进行分析。基于MapInfo平台建立了公交网络空间数据库和属性数据库,给出了在VC＋＋可视化环境下基于MapX控件的公交网络最优路径实现方法及其应用。     

MapX在VC++中集成实现军用标图系统的研究

为适应军队信息化发展的要求,开发一个C^3I系统,首先要解决的问题就是开发一套适用于军事应用的标图系统。本文分析了GIS组件——MapX的特性,阐述了将MapX集成于VC 6．0中绘制军用图形的基本方法,并给出了实现军用标图系统的一种解决方案。     

On-line hand-drawn electric circuit diagram recognition using 2D dynamic programming

In order to facilitate sketch recognition, most online existing works assume that people will not start to draw a new symbol before the current one has been finished. We propose in this paper a method that relaxes this constraint. The proposed methodology relies on a two-dimensional dynamic programming (2D-DP) technique allowing symbol hypothesis generation, which can correctly segment and recognize interspersed symbols. In addition, as discriminative classifiers usually have limited capability to reject outliers, some domain specific knowledge is included to circumvent those errors due to untrained patterns corresponding to erroneous segmentation hypotheses. With a point-level measurement, the experiment shows that the proposed novel approach is able to achieve an accuracy of more than 90 percent.     

飞行仿真系统数据可视化设计与实现

研究飞行仿真系统结果数据可视化,为验证分析飞行仿真系统结果的正确性,需要对仿真系统输出的飞行性能数据进行实时在线观测并与标准数据进行对比分析。针对飞行仿真系统对飞机飞行数据实时观测的需求,设计了一种可实时观测的飞行仿真数据可视化方案。在建立仿真系统模型的基础上,为了提高系统的可靠性和优化数据结构,提出了新的数据结构和曲线生成算法绘制实时曲线,实现了数据的可视化观测,避免了实时绘制过程屏幕的闪烁和曲线出现的锯齿。并结合飞行仿真特点,利用MapX组件技术加载了具有导航台的全国地图,对传统的电子地图显示进行了改进,实现了飞机在地图上的实时航迹观测。仿真结果表明,系统能够实时观测仿真结果并分析系统误差,实现飞行仿真数据的可视化,并可验证飞行仿真系统的正确性。     

基于L系统的植物建模方法改进

为了克服将L系统代码用于编程指导时繁琐的缺点，在简要介绍了L系统代码生成的各阶段图形的性质进行了分析，利用分析结果，给出了一种改进方法，该方法首先把系统代码转换成简单递归表达式，然后，根据这个表达式编写具有递归结构的程序，从而不仅避免了传统方法中庞大的链表结构和复杂的遍历过程，而且使植物建模和实现更加简洁而高效。最后给出该方法的一个具体应用实例。     

基于MapX的动态图像绘制的新方法

根据MapX显示动态图像功能的不足,提出了利用GIF图像在MapX上显示动态图像的新方法。该方法用CGifWnd类在MapX上生成新的窗口,并在其上显示GIF图像。提供给其他开发人员在利用组件开发GIS软件时,实现GIS功能的新思路。     

Discovering High-Order Periodic Patterns

Discovery of periodic patterns in time series data has become an active research area with many applications. These patterns can be hierarchical in nature, where a higher-level pattern may consist of repetitions of lower-level patterns. Unfortunately, the presence of noise may prevent these higher-level patterns from being recognized in the sense that two portions (of a data sequence) that support the same (high-level) pattern may have different layouts of occurrences of basic symbols. There may not exist any common representation in terms of raw symbol combinations; and hence such (high-level) pattern may not be expressed by any previous model (defined on raw symbols or symbol combinations) and would not be properly recognized by any existing method. In this paper, we propose a novel model, namely meta-pattern, to capture these high-level patterns. As a more flexible model, the number of potential meta-patterns could be very large. A substantial difficulty lies in how to identify the proper pattern candidates. However, the well-known Apriori property is not able to provide sufficient pruning power. A new property, namely component location property, is identified and used to conduct the candidate generation so that an efficient computation-based mining algorithm can be developed. Last, but not least, we apply our algorithm to some real and synthetic sequences and some interesting patterns are discovered.     

Retraction and Generalized Extension of Computing With Words

Fuzzy automata, whose input alphabet is a set of numbers or symbols, are a formal model of computing with values. Motivated by Zadeh's paradigm of computing with words rather than numbers, Ying proposed a kind of fuzzy automata, whose input alphabet consists of all fuzzy subsets of a set of symbols, as a formal model of computing with all words. In this paper, we introduce a somewhat general formal model of computing with (some special) words. The new features of the model are that the input alphabet only comprises some (not necessarily all) fuzzy subsets of a set of symbols and the fuzzy transition function can be specified arbitrarily. By employing the methodology of fuzzy control, we establish a retraction principle from computing with words to computing with values for handling crisp inputs and a generalized extension principle from computing with words to computing with all words for handling fuzzy inputs. These principles show that computing with values and computing with all words can be respectively implemented by computing with words. Some algebraic properties of retractions and generalized extensions are addressed as well.     

Automatic analysis and integration of architectural drawings

Recognition and integration of 2D architectural drawings provide a sound basis for automatically evaluating building designs, simulating safety, estimating construction cost or planning construction sequences. To accomplish these targets, difficulties come from (1) an architectural project is usually composed of a series of related drawings, (2) 3D information of structural objects may be expressed in 2D drawings, annotations, tables, or the composites of above expressions, and (3) a large number of disturbing graphical primitives in architectural drawings complicate the recognition processes. In this paper, we propose new methods to recognize typical structural objects and architectural symbols. Then the recognized results on the same floor and drawings of different floors will be integrated automatically for accurate 3D reconstruction.     

基于MapX的高速公路监控系统的设计

分析了地理信息系统的开发方法和MapX组件的数据组织和空间数据结构,讨论了在高速公路监控系统中MapX的使用,同时利用MapX实现了系统中的图层控制、设备查询、路段状况显示、设备故障闪烁、数据绑定等功能。使用MapX组件用户可方便地在自己的模块中嵌入地图化功能,同时可实现地理信息的查询和统计,使用简便高效。