倾斜摄影和激光点云技术在大比例尺测图中的应用

在传统大比例尺测图中,建筑物特征线的获取方法或精度高效率低或效率高精度低。本文通过对倾斜三维模型分析,提出了基于直线公理的建筑物特征线快速提取方法;针对高程点数据均为人工采集的现状,引入激光点云数据通过分类插值法自动生成高程特征点。研究证明,本文方法在精度与效率等方面均可取得良好效果,提高了特征线（建筑物线）、特征点（高程点）采集的自动化程度。     

城市规划图文一体化办公系统的建立

通过分析城市规划办公自动化的需求和发展状况,结合广州市规划管理的应用实践,总结了GIS与OA 技术相结合在城市规划领域应用的方法、模式,阐述了系统的设计思想和技术集成方法,并举例说明系统的实际 应用效果,为数字规划提供了一个成熟的应用实例。     

Strategies to Make Methods Based on Flow Injection Analysis Greener

The implementation of flow injection analysis (FIA) systems and correlated techniques in the laboratory routine provides an increase of analytical throughput and the reduction of risks of analyte losses and contamination. Naturally, it contributes to the reduction of reagent consumption and minimization of waste generation. This paper presents and discusses an overview of the main strategies adopted to make methods based on FIA systems more environmentally friendly, and offers a review of these methods that covers the period from January 2002 to December 2019. Strategies based on reagent management (adoption of procedures without reagents, replacement of toxic reagents, recycling and reuse of reagents and, use of immobilized reagents), the online waste treatment, and the improvements of FIA systems (flow system configurations that avoid reagent wastage, use of green detectors, automation, and miniaturization) are approached in this perspective.     

测绘人员智能家居系统设计探讨

分析了智能家居的内涵;阐述了智能家居系统的设计目的;指出了智能家居的核心和特点是数字化、网络化、智能化;提出了智能家居系统的实现方法:由智能家居应用集成系统、家庭网关、家庭网络联网技术等组成。     

Towards automation of palynology 1: analysis of pollen shape and ornamentation using simple geometric measures,derived from scanning electron microscope images

This is the first of a series of papers on the theme of automated pollen analysis. The automation of pollen analysis could result in numerous advantages for the reconstruction of past environments, with larger data sets made practical, objectivity and fine resolution sampling. There are also applications in apiculture and medicine. Previous work on the classification of pollen using texture measures has been successful with small numbers of pollen taxa. However, as the number of pollen taxa to be identified increases, more features may be required to achieve a successful classification. This paper describes the use of simple geometric measures to augment the texture measures. The feasibility of this new approach is tested using scanning electron microscope (SEM) images of 12 taxa of fresh pollen taken from reference material collected on Henderson Island, Polynesia. Pollen images were captured directly from a SEM connected to a PC. A threshold grey‐level was set and binary images were then generated. Pollen edges were then located and the boundaries were traced using a chain coding system. A number of simple geometric variables were calculated directly from the chain code of the pollen and a variable selection procedure was used to choose the optimal subset to be used for classification. The efficiency of these variables was tested using a leave‐one‐out classification procedure. The system successfully split the original 12 taxa sample into five sub‐samples containing no more than six pollen taxa each. The further subdivision of echinate pollen types was then attempted with a subset of four pollen taxa. A set of difference codes was constructed for a range of displacements along the chain code. From these difference codes probability variables were calculated. A variable selection procedure was again used to choose the optimal subset of probabilities that may be used for classification. The efficiency of these variables was again tested using a leave‐one‐out classification procedure. The proportion of correctly classified pollen ranged from 81% to 100% depending on the subset of variables used. The best set of variables had an overall classification rate averaging at about 95%. This is comparable with the classification rates from the earlier texture analysis work for other types of pollen. Copyright © 2004 John Wiley & Sons, Ltd.     

三维激光点云自动化建模思路探索

点云数据自动化应用时,尤其是三维自动化建模过程中,传统的点云自动化处理技术难以实现。点云自动化建模是一个复杂的过程,涉及对象识别、点云处理、参数化建模等多个领域。本文结合三维激光扫描技术,针对不同的项目和应用方向对三维模型成果的不同需求,对现阶段各个行业和方向的三维模型成果及构建方法进行了汇总和分析,进一步提出了3种三维激光点云自动化建模的新思路和可行性分析,并分析了自动化建模思路的优势和应用方向。     

自动制图综合链理论与技术模型

为满足地图生产自动化和GIS中对自动制图综合的迫切需求,必须研究新的理论、方法和模型。在充分探讨制图综合现状和存在问题的基础上,系统研究自动制图综合链理论与技术,把抽象的制图综合操作过程化、任务化、步骤化,并把制图综合任务转化为计算机环境下自动执行与优化的可执行操作链,从而达到提高制图综合自动化、智能化水平的目的。     

AutoCAD数据接边检查自动化的实现

图幅数据的接边检查在测绘生产中是必不可少的工序。由程序实现的自动接边检查不但可以避免人工作业的疏漏,而且对于某些人工作业难以发现的错误,也有较好的效果。     

海图出版数据的通告改正更新技术研究

基于目前海图出版数据缺乏通告改正更新、无法实现对其再利用的现状,提出了一种利用MicroStation自动化编程技术实现通告改正更新的新方法,并解决了数字航海通告格式建立和通告改正数据分层存储等关键技术问题,在此基础上开发了海图出版数据的通告改正更新系统.     

一种支持城市路网交通关系自动化的智能模型

针对车载导航、地图网站等应用中路网要素之间交通关系维护的难题,提出一种支持路网要素交通关系自动化的智能过程模型,将路网要素交通关系自动化过程理解为由路网要素间的空间和语义关系、规则集和控制系统组成的产生式系统.该产生式系统可在路网要素空间和语义信息基础上,通过定义可扩展的交通关系规则集,自动化地生成符合应用需求的路网要素间的交通关系.此外,在该产生式系统中引入触发器概念监控和响应几何网络及其交通关系规则集的变更,实时更新逻辑网络中的连通关系信息,实现几何网络、规则集和逻辑网络三者的一致性.同时,提出路网要素交通关系处理的控制策略和关键流程,并对该智能网络模型的有效性进行了验证.

Abstract：

Maintaining the traffic connectivity relations between road features has always been a time consuming task for in-vehicle navigation, map website, and other traveling service related applications. Such a task has been commonly conducted artificially and inevitably inefficient, yet makes data quality control difficult. Considering the intrinsic rules of traffic connectivity formed by the geometrical structures, spatial and semantic relationships between road features in city road networks, an intelligent processing model is set forward in this paper for traffic connectivity automation. It is argued that traffic connectivity automation between road features is fundamentally a production system composed of the spatial and semantic relations between road features, connectivity rules and control system. With the implementation of an extendable connectivity rule set, the traffic connectivity relations between road network features are built automatically based on the spatial and semantic information of road network. The trigger concept is adopted to monitor and respond the changes in geometrical network and connectivity rules, and then dynamically updates the traffic connectivity between road network features in logical network so as to guarantee the consistence between geometrical network, connectivity rules and logical network. A series of control strategies and a conducting engine are developed to maintain the traffic connectivity relations. A case study conducted on a real road network verifies the effects of the proposed intelligent model.