数字化测氡的实验研究

采用流通式氡气源模拟实际流程，对数字化测氡的各个环节以及仪器标定方法进行了实验研究。发现计数率随气体流量的升高而降低，并用氡气在闪烁室中的通过时间予以解释。指出对测氡仪器必须进行标定，而且必须用流通式氡气源标定；在观测中应控制或测定进入闪烁式的气体流量。最后对闪烁室的放射性污染进行了理论分析。     

结构主动控制和混合控制的装置和方法

本系统讨论了土木工程结构的主动控制和混合控制设备的构造和性能及其实际应用的效果；对一般非线性优化控制方法及其效用做了分析介绍；对当前土木工程结构控制研究中存在的困难和问题以及今后的发展趋势进行了分析讨论和展望。     

适合于印刷品评价与控制的色度仪应满足的条件

本文从印刷工业颜色测量的需要出发,根据色度学理论、人的视觉特性和对印刷过程的分析提出印刷品评价对颜色测量仪的要求。包括对颜色测量理论的选择,对测量几何的要求;对测量光孔和测试色定位的要求;对照明光源和标准观察者类型的选择;对测量值的输出和测量速度等要求。这些内容对色度仪的设计和使用都具有重要意义。     

The Disparity Between the Level of Economic Development and Human Welfare

The lack of correspondence between traditional economic development measures, such as GNP per capita, and human welfare measures, such as the PQLI, has been well documented in the literature. We devised and analyzed an economic development-welfare disparity measure, and found considerable geographic variability, with actual levels of human welfare much less than expected in many Middle Eastern and African countries, given the level of economic development. Exploratory correlation and regression analysis revealed that inequalities in the distribution of economic power and governmental expenditures contributed to the geographic variability. More importantly, each region improved its standing on the development-welfare disparity measure when relevant factors were controlled via multivariate regression.     

Fast Nearest Neighbor Classification Methods for Multispectral Imagery

Nearest neighbor classifiers have not been widely used by remote sensing practitioners. The lack of acceptance of these classifiers may be partially due to their notoriously slow speed of execution which makes them impractical for the classification of mega-pixel images. However, training data reduction, distance measure optimization, and neighbor searching algorithms based on the modified k-d tree can speed nearest neighbor classification substantially.     

我国区域可持续发展状态的综合测度

区域可持续发展的内涵是在确保经济稳定增长和社会发展的同时,使自然资源得到合理利用,生态环境保持良性循环。因此,有必要从系统运行中提取具有标识性意义的定量化信息,来监控区域可持续发展的方向和能力。文章依据一定的原则,选取了4大类28个指标对我国大陆31个省、市、自治区的可持续发展状态进行了综合测度,提出了区域可持续发展综合能力组合类型,并对其发展状态进行了综合分析评价。     

浅析数字摄影测量在1∶500地形图测绘中的应用

数字摄影测量,应用计算机技术、数字影像处理、影像匹配、模式识别等理论与方法,以计算机视觉代替人眼的立体观测,其产品与中间数据的记录以及处理的原始资料均是数字的,较之常规的(传统的)数字产品的生产方法,具有自动化程度高、速度快、成果多样化等优点。两次外业和两次内业,是∶地形图数字摄影测量的主要作业流程,第二次外业调绘作为1500数字摄影测量的主要外业工作与常规调绘方法有一定的区别。∶地形图数字摄影测量适合于1500大面积数字化测图。