顾及纹理特征的航空影像自适应密集匹配方法

半全局匹配实质是在视差连续性假设下的离散优化方法。为克服视差断裂带影响,依赖一组参数控制视差不一致性。若参数过小,在平面内难以保证视差连续性,产生明显噪声,导致凹凸不平现象;若参数过大,将致使物体表面过于平滑,难以保留视差断裂等重要特征。为克服上述问题,本文提出了一种顾及纹理特征的自适应密集匹配方法:首先,检测影像纹理特征并定量表达纹理丰富性程度;其次,依据纹理丰富程度与视差差异存在正相关的规则知识,实现匹配参数依据纹理信息的自适应选择;最后,采用上述参数进行自适应的半全局匹配。通过ISPRS基准数据集和国产SWDC-5获取的倾斜影像进行试验分析证明,本文方法能够有效减少低纹理区域匹配噪声,同时更有效保留边缘特征。     

The source vector and static displacement field by elastic dislocation on the two-phase saturated medium

IntroductionSince Steketee introduced the elastic dislocation theory into geophysics in 1958, it has become an important part of seismology. Because the fracture of fault can be treated as a displacement bound, the elastic displacement field (forward problem) can be studied by the static elastic dislocation theory under some given condition. Vice versa, if the static displacement field is known, the cause (inverse problem) can be inferred by the dislocation theory. In the last 40 years, many …     

浅析“北约”东扩之争的地缘政治因素

“北约”是北大西洋公约组织的简称。它是于1949年4月在美国操纵下成立的。当时成员有美、英、法、荷兰、比利时、卢森堡、加拿大、丹麦、挪威、冰岛、意大利、葡萄牙，稍后土耳其、希腊和西德(两德统一后，为德国)参加，现共有成员16个。美国成立该组织的目的有三个：一控制欧洲；二体现其世界霸主地位；三威胁当时的苏联和控制当时的西德。     

北半球冰川物质平衡变化的若干特征及其气候意义

根据北半球连续观测的４０多条冰川物质平衡资料，分析了目前冰川物质平衡状态及影响它们的地形因互。冰川物质平衡的变化在区域间存在着一定的联系：斯堪的纳维亚、落基山和天山地 区冰川物质平衡的变化在大多数时间内存在着对应联 系，而与阿尔卑斯山冰川物质平衡的变化具有不同程度的反向波动特征。     

Morphological study of the genus <Emphasis Type="Italic">Herposiphonia</Emphasis> (Rhodophyta,Rhodomelaceae) on the coast of eastern Guangdong,China, with a description of <Emphasis Type="Italic">H. pinnata</Emphasis> sp. nov.

We present a taxonomic study of taxa of the red algae genus Herposiphonia (Rhodophyta, Rhodomelaceae), collected from the coast of eastern Guangdong, China. We made detailed morphological studies and considered recent taxonomic criteria for species delimitation, and are making the first report of five different species on the coast of Guangdong, including a new species. The species identified were H. caespitosa Tseng, H. hollenbergii Dawson, H. pecten - veneris (Harvey) Falkenberg, H. subdisticha Okamura and H. pinnata Ding and Tan sp. nov. H. pinnata sp. nov. is characterized by bright green thalli; most parts of the feathery thalli are free of the substratum; determinate branches and indeterminate branches are arranged in a chaotic sequence; the primary axis has bare segments; the determinate branch has 9–11 periaxial cells per segment; vegetative trichoblasts are abundant; and tetrasporangia are formed on the middle of the determinate branch with 1–8 successive segments in a single rectilinear series. This paper is also the first record of sporophyte plants of H. pecten-veneris.     

CAWS600-B自动气象站传感器故障判断和解决办法

通过对菏泽市大气自动监测站出现过的传感器故障进行梳理、归纳,找出其共性和不同点,根据自动气象站原理和自动气象站维修手册结合笔者在实际工作中的经验,找出传感器故障和解决办法之间的相关性,得出解决故障的最简单办法。使测报人员在发现传感器出现问题时,能判断出故障原因,快速自主处理简单故障,或在上级维修人员指导下顺利排除复杂故障,提高传感器故障修复时效。     

水文变化驱动的暴雨-洪涝灾害主动模拟方法

正随着全球气候变化和城市化进程的加剧,暴雨-洪涝灾害呈现出突发性强、预见期短的特征,其时空变化的复杂性和不确定性日益突出,暴雨-洪涝灾害的模拟预警已经成为国际学术研究的热点前沿。大量已有研究基于稳定环境的理论假设,采用静态数据驱动的被动式模拟方法导致"数据滞后、分析滞后和决策滞后"的问题日益突