基于视觉显著性和特征整合的感兴趣区域检测

根据人类视觉感知理论,提出了一种基于视觉显著性和特征整合的感兴趣区域检测方法。首先提取亮度、纹理、梯度和方向4种遥感图像的显著特征,构造相应的特征图;然后利用一种结合局部与全局显著性的新的显著性度量策略计算各特征图的显著性;采用强度对比方式将特征显著图加权合并为一幅总显著图,最后通过区域提取方法将显著区域提取出来,即得到感兴趣区域。实验结果表明,该方法能准确快速地定位显著区域,且能精确刻画区域轮廓,取得了较为满意的检测和兴趣度量结果。     

Determining the minimum sum of the component masses for a binary with a known parallax from observations of a short arc of its apparent motion

An inequality that allows the minimum sum of the component masses for a binary, M₀, to be determined was derived from simple geometric considerations. This quantity satisfies the observed orbital motion according to Newton's law with a known parallax. The M₀ value can be calculated if the apparent-motion parameters for the components, including the curvature of the observed short orbital arc, were determined from observations. We estimated M₀ for 14 Pulkovo program stars for which the apparent orbital arc covered with observations was no less than 10°. We compare M₀ with the masses estimated from the mass-luminosity relation. A significant mass excess was found for the star ADS 10329.     

区域形象设计

区域形象是对这一区域的认知和评估，是历史的积累。区域形象有一个很长的发展形成过程，反映一个区域的环境、素质和声誉，是经济发展的重要资源。区域形象设计是区域规划和城市规划的组成部分。     

遥感可视化建模工具的工作流模型及分布式调度算法

分布式工作流引擎相对集中式引擎在处理事务效率上有明显的优势.针对现有遥感可视化建模工具对于大规模、大数据的工作流程在效率上存在的问题.分析集中式与分布武工作流系统的特点,参考了当前流行的产品架构,结合实际应用需求,根据遥感影像处理的特征,提出基于有向图的分布式BFS算法的引擎调度算法,算法考虑了分布式系统中时间一致性以及数据一致性问题,引入一种新的冲突解决策略,解决分布式系统下由于时间不一致导致的部分结点不能得到正确的层号的问题;采用等待机制和数据流图的概念,控制较快的分支的执行速率,容许较慢的分支在没有被较快分支赶上时完成对流程图的搜索,保证任务结点所接收数据的完整性.     

小兴安岭风景道旅游景观评价

在黑龙江省伊春市进行国内第一条驾车旅游观光风景道规划设计过程中，从旅游者体验风景道品质的特定要求出发，建立一种简单易行，科学经济的旅游景观评价方法，即称之为“等距离专家组目视评测法”（EDVAET），在实地观测评价基础上，建立由地形，视觉质量，视域，景观被及沿途典型景观照片构成的景观数据库，并分别对景观被分类分段评价，视质评价，视域评价进行分析，不仅提供了一种线性旅游景观评价的适用技术，也为风景道规划设计提供了科学依据。     

基于Anubis的北斗观测数据质量分析

为分析BDS在亚太地区及其他范围内的数据质量差异,选取2个国内和3个境外MGEX连续跟踪站10 d的数据,利用Anubis软件对BDS及GPS数据质量进行对比和可视化分析,同时着重分析C37以上不同类型轨道卫星的多路径效应及信噪比.结果表明,BDS各测站的数据完整率均为100％;各频段各类型卫星的伪距多路径平均值均低于...     

一种基于视觉特征的多分辨率快速图像融合方法

以红外与可见光图像融合为例,提出了一种基于图像视觉特征相关量值的多分辨率快速图像融合方法.该方法先利用CDF9/7小波将输入图像进行提升分解,然后在对分解后的小波系数矩阵采用视觉特征进行融合处理,最后通过提升逆变换得到重构图像.实验表明该方法即使在图像信噪比较低的情况下,仍能得到较好的熵、边缘及较高分辨率的效果,且执行效率高.     

Follow‐up spectroscopic observations of HD 107148 B: A new white dwarf companion of an exoplanet host star

We report on our follow‐up spectroscopy of HD 1071478 B, a recently detected faint co‐moving companion of the exoplanet host star HD 107148 A. The companion is separated from its primary star by about 35″ (or 1790 AU of projected separation) and its optical and near infrared photometry is consistent with a white dwarf, located at the distance of HD 107148 A. In order to confirm the white dwarf nature of the co‐moving companion, we obtained follow‐up spectroscopic observations of HD 107148 B with CAFOS at the CAHA 2.2 m telescope. According to our CAFOS spectroscopy HD 107148 B is a DA white dwarf with an effective temperature in the range between 5900 and 6400K. The properties of HD 107148 B can further be constrained with the derived effective temperature and the known visual and infrared photometry of the companion, using evolutionary models of DA white dwarfs. We obtain for HD 107148 B a mass of 0.56 ± 0.05 M_⊙, a luminosity of (2.0 ± 0.2) × 10^–4 L_⊙, log g [cm s^–2]) = 7.95 ± 0.09, and a cooling age of 2100 ± 270 Myr. With its white dwarf companion the exoplanet host star HD 107148 A forms an evolved stellar system, which hosts at least one exoplanet. So far, only few of these evolved systems are known, which represent only about 5 % of all known exoplanet host multiple stellar systems. HD 107148 B is the second confirmed white dwarf companion of an exoplanet host star with a projected separation to its primary star of more than 1000 AU. (© 2016 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)     

基于LoRa的铁路路基沉降数据采集系统设计

设计一套铁路路基沉降数据自动化采集系统,采用静力水准仪作为铁路路基沉降数据的采集单元,利用LoRa无线通信技术,选用低功耗STM8系列单片机和SX1278收发器,在IAR环境下移植Contiki操作系统及其自带的Rime协议栈,完成Mesh网络的多跳传输。将采集到的铁路路基沉降数据形成可视化监测界面,实现现有铁路路基沉降数据远距离、低功耗、可靠的无线传输。     

Geographical Text-Books and Geographical Teaching

Abstract

We are teaching the television generation in our college classrooms and if we can't beat' em, we should certainly join' em. Visual images can, indeed, be effective teaching tools in geography. Three uses of a “classic” concealed image of Jesus Christ in a melting snowfield are discussed. First, the image serves as an example of the geographer's search for spatial regularities. On a more interpretative level, the concealed image becomes a metaphor for the quasi-religious quest for scientific truth. If we aren't careful, this quest can devolve into Ideological explanation. Finally, the mysterious origin of the Jesus image is akin to an urban legend. Its origin may be used to illustrate the fallibility of scientific citation as can the image entitled “My Wife and My Mother-in-Law” incorrectly cited by the geographer William Kirk. Whether the Jesus image was a natural event or a product of human creation is an object lesson in the pitfalls of imputed intentionality.