浅论高速公路建设中的隧道施工测量

在高速公路的隧道建设中,实时精确的隧道测量不仅可以保证路线的精度,更是为施工安全和质量提供保障。     

一个解决平面几何问题的有效方法

欧氏几何是射影几何的子几何,用射影的观点考虑一些几何问题,不需要太多技巧,并且在很大程度上使问题的解决变得容易,射影坐标的建立就是一个解决平面几何问题的有效方法。     

直线法线式方程在建筑施工放样中的应用

建筑物轴线的放样主要是计算出各轴线的交点的坐标,然后通过全站仪极坐标放样的方法定出轴线交点的位置。由于建筑物坐标系和测量坐标系不同,应先通过坐标转换将建筑物轴线交点转换为测量指标,本文提出无需进行坐标转换,而是通过建立建筑方格网主轴线法线式直线方程,并以此推求出建筑物轴线的法线式直线方程,进而通过解方程组求得交点坐标。     

试论测区CORS坐标转换参数定制测绘的技术及方法

自2000年深圳建立CORS系统以后,CORS系统在我国迅速发展推广。本文先简单介绍CORS系统,再对测区中CORS坐标转换参数定制测绘中的理论、方法进行讨论,这对以后相似的测绘活动具有参考价值。     

城市公共交通规划项目案例的评选与处理

近年来,高等学校工科专业课程的教学模式改革受到了广泛重视。以案例为中心的项目化教学,有助于激发学生的兴趣与动机、整合学科知识、强化实际技能,尤其适合工科专业课程的教学,以交通规划课程中公共交通规划的教学为例,介绍和分析了公交规划项目案例的评选与处理方法。     

Modelling innovation support systems for regional development – analysis of cluster structures in innovation in Portugal

The present article offers a concise theoretical conceptualization and operational analysis of the contribution of innovation to regional development. The latter concepts are closely related to geographical proximity, knowledge diffusion and filters and clustering. Institutional innovation profiles and regional patterns of innovation are two mutually linked, novel conceptual elements in this article. Next to a theoretical framing, the article employs the regional innovation systems concept as a vehicle to analyse institutional innovation profiles. Our case study addresses three Portuguese regions and their institutions, included in a web-based inventory of innovation agencies which offered the foundation for an extensive database. This data-set was analysed by means of a recently developed principal coordinates analysis followed by a Logistic Biplot approach (leading to a Voronoi mapping) to design a systemic typology of innovation structures where each institution is individually represented. There appears to be a significant difference in the regional innovation patterns resulting from the diverse institutional innovation profiles concerned. These profiles appear to be region specific. Our conclusion highlights the main advantages in the use of the method used for policy-makers and business companies.     

双坐标系多参量目标的融合定位

雷达探测的距离、方位角与目标应答的高度属于两个不同坐标系,无法使用坐标变换 公式进行定位,为此提出了一种迭代求解方法。首先采用几何法求出雷达探测坐标系 的俯仰角初始值,然后直接利用坐标变换公式给出求解的迭代算法。Matlab仿真数值实例表 明了经度和纬度的定位误差均小于0.000 02°。     

Institutional capacity to dynamically innovate: An application to the Portuguese case

The present paper addresses the dynamics of innovation, by extending the analysis beyond a static-economic perspective. It offers a dynamic-institutional mapping of relational capacities to dynamically innovate. Its main goal is to contribute to the above-mentioned research theme by presenting a new methodology able to pinpoint different trends in the relational capacities of institutions when they are innovative. Thereby, major characteristics in the networks of innovation are identified. This investigation uses an extended set of private institutions and public organizations located in Portugal, evaluated by their WebPage contents. To this data set a new combination of multivariate statistical methods is applied to detect group performances, to compare them, and to identify gradients of capacity to dynamically innovate. The results demonstrate that this method can provide extremely useful and tailor-made information for policy evaluation at regional or national levels.     

莱索托地区北京一号全色影像几何校正方法研究

研究目的：确定莱索托地区北京一号全色影像几何校正方法。研究方法：基于线阵推扫式模型和投影变换模型的几何校正方法,采用真实的莱索托境内平地、高山地两景北京一号全色影像进行试验。研究结果：基于投影变换模型的莱索托地区北京一号全色影像几何校正方法比基于线阵推扫式模型的几何校正方法具有相当或更高的精度。研究结论：投影变换模型可用于莱索托地区土地利用遥感影像图的制作。