月球探测摄影测量数据处理系统方案分析

本文提出了月球摄影测量数据处理系统的设计原则，探讨了月球摄影测量数据处理系统的组成和研究的内容，分析了在月球探测摄影测量数据处理中，首先应该解决的关键技术问题。结论：对月球探测摄影测量数据处理系统的研究，可以保障月球探测卫星工程测绘月球表面三维影像图及地形图任务的完成，同时，也可以为后续的月球探测计划提供摄影测量的基础理论、技术、方法和实践经验。     

Petrogenesis and significance of early Yanshanian syenite-granite complex in eastern Nanling Range

According to the statistics for granitoid distribution map of 1/2000000 Nanling region[1], the granitoids in the Nanling region sum up an area of more than 170000 km2, occupying about one fifth of the entire Nanling region. Granitoid rocks in the Nanlingregion are mainly composed of monzogranites (occu- pying more than 84%), granodiorites (about 11%) and syenogranites (about 3%)[2]. There also exists a small amount of syenites (0.12%) with a sum area of about 94 km2[2]. However, nearly half …     

甘肃省两当县寺合金矿床地质特征与找矿方向

寺合金矿床位于秦岭褶皱系礼县-柞水华力西褶皱带和南秦岭印支褶皱带的结合部位,受与夏河-临潭-岷县-宕昌-西和-凤县深大断裂斜交的断裂带、印支-燕山期花岗闪长岩体的共同控制.矿床赋存于泥盆系变质砂岩、千枚岩中.矿体呈板状、似板状.矿石为多金属石英脉型,以原生矿为主,近地表为氧化矿石.金属矿物主要为黄铁矿、毒砂、方铅矿、闪锌矿、黄铜矿、褐铁矿.今后应注意在有利的地层(岩性)、有利的构造和岩体周边找金,利用地化剖面在深部找金.     

准苏吉花敖包铜多金属矿控矿因素分析

准苏吉花敖包铜多金属矿区位于东乌旗-二连浩特多金属成矿带西段,地质情况复杂.因部分地层中含有碳质板岩,对地球物理工作的结果产生了一定的影响.通过结合地质、地球物理、地球化学特征分析,总结出了该区的找矿方向.     

层状粘弹性介质中SH波的反射、透射问题

处理粘弹性介质有两种方法,一种是在运动方程中加入介质的粘滞性因素,另一种是从本构方程入手,建立介质的粘弹性模型。后一种方法在研究介质物理性质上具有直接性,是目前使用较为普遍的处理方法。从本构方程的角度,以波尔兹曼(Bo ltzm ann)叠加原理为基础,建立积分型本构方程,进而建立粘弹性介质波动方程,得到二维粘弹性平面波解,并研究了层状粘弹性介质分界面处平面波的反射、透射问题,计算反射、透射系数CR、CT,同时进行了一定的理论分析。     

温度探测土坝圆柱状集中渗漏模型研究

渗漏是堤坝破坏主要形式之一，只有确定渗漏发生的确切位置和集中渗漏通道的大小和强度，才能对其有效治理。本文基于渗流和渗漏情况下堤坝温度场特征及温度示踪基本原理，对复杂的实际问题进行科学简化合理假设，把集中渗漏通道简化为圆柱状并作为边界条件，结合钻孔探测温度实际，运用稳定热传导理论，建立了圆柱状堤坝渗漏温度示踪模型。利用测井温度曲线的最大异常温度，该模型可以计算渗漏通道的位置，渗漏通道大小，流速等参数。工程实践表明，对于垂向流速较小的地下水渗漏进行温度场示踪是有效的方法。     

矢量GIS空间方向关系的演算模型

空间方向关系是描述空间目标间位置分布的一类基本空间约束，在GIS中是由形式化模型描述的。但现有模型由于简化假设过多，其描述分辨率较低。以点／点空间方向关系的计算量为基础，在综合考虑空间目标的几何构成和分布关系后，提出了定量化演算空间方向关系的一种新模型。利用该模型的结果，根据定量表达与定性描述之间的转换函数，可以得到相应的定性描述结果。理论分析和算例表明，新模型对目标间距离和目标本身的形状等影响方向关系的参数更为敏感，因而比现有模型有更高的描述分辨率。     

Study on shear wave splitting in the aftershock region of the Yao＇an earthquake in 2000

After Ms=6.5 Yao＇an earthquake on January 15, 2000, a large amount of aftershock waveforms were recorded by the Near Source Digital Seismic Network （NSSN） installed by Earthquake Administration of Yunnan Province in the aftershock region. It provides profuse data to systematically analyze the features of Yao＇an earthquake. The crustal anisotropy is realized by shear wave splitting propagating in the upper crust. Based on the accurate aftershock relocations, the shear wave splitting parameters are determined with the cross-correlation method, and the results of different stations and regions are discussed in this paper. These conclusions are obtained as follows： firstly, the average fast directions of aftershock region are controlled by the regional stress field and parallel to the maximum horizontal compressive stress direction; secondly, the average fast directions of disparate stations and regions are different and vary with the structural settings and regional stress fields; finally, delay time value is affected by all sorts of factors, which is affinitive with the shear wave propagating medium, especially.     

Nonlinear Response of Single Piles in Sand Subjected to Lateral Loads using k hmax Approach

This paper presents results of analysis of full-scale pile load test data of 14 piles embedded in either loose or medium dense sands. The analysis was performed using two methods, p–y curve approach and a more recently developed k_hmax approach. Comparison of the results obtained using both the methods is also presented. A step-by-step analysis procedure is presented for predicting lateral load deflection response of single piles in sand using the k_hmax approach. The results presented show that the k_hmax approach has promise over the p–y curve approach because of its simplicity and the fact that it provides upper- and lower-bound curves, which are valuable guides to making engineering decisions. For loose sands, a new range of k_hmax values is recommended to better predict the lateral load–deflection response of single piles.     

Study on shear wave splitting in the aftershock region of the Yao'an earthquake in 2000

After Ms=6.5 Yao'an earthquake on January 15, 2000, a large amount of aftershock waveforms were recorded by the Near Source Digital Seismic Network (NSSN) installed by Earthquake Administration of Yunnan Province in the aftershock region. It provides profuse data to systematically analyze the features of Yao'an earthquake. The crustal anisotropy is realized by shear wave splitting propagating in the upper crust. Based on the accurate aftershock relocations, the shear wave splitting parameters are determined with the cross-correlation method, and the results of different stations and regions are discussed in this paper. These conclusions are obtained as follows:firstly, the average fast directions of aftershock region are controlled by the regional stress field and parallel to the maximum horizontal compressive stress direction; secondly, the average fast directions of disparate stations and regions are different and vary with the structural settings and regional stress fields; finally, delay time value is affected by all sorts of factors, which is affinitive with the shear wave propagating medium, especially.