华南铀矿省铀矿构造成矿作用及其时空演化

华南铀矿省内已发现的工业铀矿床类型有花岗岩型、火山岩型、碳硅泥岩型、碳酸盐岩型和砂岩型。在空间上。铀矿床受环形及线性构造控制,并受上地幔构造制约。幔凸、幔凹阳地幔变异带互相交错,造成本区地幔的极不均一性,这是本矿省成矿的深部地质构造背景。通常铀矿床呈面型成环状分布,大型环形构造控制铀矿省,中型和小型环形构造控制铀矿田和矿床的产出。     

基于动恣规划的整体影像匹配

影像匹配是数字摄影测量工作的基础。考虑到多条核线上的匹配点，本文提出了一种基于动态规划的整体影像匹配方法，构造了一种新的立体匹配模型，并将该模型转化成为简单的一维动态规划模型，采用对角线的方法划分阶段，用视差较和相关系数来构造阶段的代价函数，从而得到了基于动态规划的整体最优匹配结果。     

基于松弛法的影像边缘提取

提出一种基于松弛法的影像边缘提取算法．本文详述了边缘标号的设置及初始概率的计算，并根据邻域内的信息分布，综合考虑了边缘的先验知识，设计出自适应的支持函数．     

K-Ar isotopic geochronology of Lianhuashan tungsten mining district,Guangdong Province

Reported in this paper are K-Ar ages of volcanic rocks, biotite-granite and greisen from the Lianhuashan tungsten mine in Guangdong Province. The isotopic dilution method was adopted in this work. Whole-rock isochron ages of the volcanic rocks are in the range 120.4±12.1 m.y. The petrogenetic age of biotite-granite and the minero genetic age of tungsten ore are close to those of the volcanic rocks. The apparent ages of various types of rock in the mining district generally bias towards younger values, which may be attributed to the effects of late thermal events which took place in the circum-Pacific metallogenetic belt.     

Application of mercury survey technique over the mausoleum of emperor qin shi huang

A detailed mercury survey was carried out over the mausoleum of the famous Emperor Qin Shi Huang. A strong, well defined anomaly was found in soil samples collected on the central part of the tomb mound. The anomaly presented a direct evidence for the authenticity of the accounts stated in Shi Ji (the first comprehensive Chinese historical writing completed about 109-91 B.C.) that there existed a large mercury reservoir in the underground basement of the Emperor's mausoleum.     

气压变化对石英弹簧重力仪读数的影响

根据我们在低压仓中对国产ZSM—Ⅲ型(简称Z)、美国Wodnre(简称W)及加拿大Scintrex CG—2型(简称C)8台重力仪进行气压实验的结果,气压变化和重力仪读数呈极好的线性关系,但每台仪器有不同的回归系数,因此在以地震预报为目的的高精度重力测量中,应该对野外观测的结果进行气压改正。用高差所建立的重力基线场的数值是否准确有进一步考虑的必要。     

Channel morphology and its impact on flood passage, the Tianjiazhen reach of the middle Yangtze River

The Tianjiazhen reach of the middle Yangtze is about 8 km long, and characterized by a narrow river width of 650 m and local water depth of > 90 m in deep inner troughs, of which about 60 m is below the mean sea level. The troughs in the channel of such a large river are associated with regional tectonics and local lithology. The channel configuration plays a critical role in modifying the height and duration of river floods and erosion of the riverbed. The formation of the troughs in the bed of the Yangtze is considered to be controlled by sets of NW–SE-oriented neotectonic fault zones, in which some segments consist of highly folded thick Triassic limestone crossed by the Yangtze River. Several limestone hills, currently located next to the river channel, serve as nodes that create large vortices in the river, thereby accelerating downcutting on the riverbed composed of limestone highly susceptible to physical corrosion and chemical dissolution. Hydrological records indicate that the nodal hills and channel configuration at Tianjiazhen do not impact on normal flow discharges but discharges > 50,000 m³s^− 1 are slowed down for 2–3 days. Catastrophic floods are held up for even longer periods. These inevitably result in elevated flood stages upstream of prolonged duration, affecting large cities such as Wuhan and a very large number of people.     

GMS数值建模方法研究综述

GMS 和 FEFLOW 为地下水数值模拟软件的典型代表,FEFLOW 具有强大的可视化功能和方便的输入输出,其缺点是难以处理复杂的水文地质条件,而 GMS 具有强大齐全的地下水模拟功能,几乎囊括了与地下水有关的所有模拟功能,包括地下水随机模拟.详细介绍了基于有限差分原理的 GMS 软件中的各个模块,以及采用 GMS 软件组建地下水数值模拟模型的各种方法,包括网格法、概念模型法和 Solid 法.     

基于进化方向遗传算法的四维变分资料同化方法

数值天气预报模式初始时刻要素场的变分同化问题是一个非线性最优化问题。利用进化方向遗传算法（EDGA）求解该最优化问题，并对理想初始场作数值模拟，结果表明模拟的效果较好。     

有限区域变分四维同化系统的设计和试验

使用共轭码技术，构造了中尺度模式的伴随模式，研究了模式侧边界条件。基于伴随模式技术的原理，设计了伴随同化和Derber同化方法两套方案；下降算法采用共轭梯度法，使用准真实资料，进行子同化数值试验和预报试验。结果表明，两套同化方案都取得了一定的同化效果，Derber同化方法比伴随同化更令人满意。证明了变分同化是提高预报准确率的一种非常有效的手段。