一种基于正则化方法的SAR图像边缘检测算法

提出了一种基于正则化方法的SAR图像边缘检测算法,并用MSTAR(moving and stationary target acquisitions and recognition)数据进行大量的仿真实验。实验表明,与经典的边缘检测方法相比,该方法能保持图像的细节特征,较好地解决了边缘断裂和抗噪问题,具有较好的边缘检测能力。     

eCognition技术在高分辨率遥感影像信息提取中的应用

本文提出了面向对象的多尺度分割策略,针对不同尺度的地物信息采用不同的分割尺度,在此基础上构建多尺度分割等级网,实现了地物信息的分层提取。以北京怀柔区QuickBird遥感影像为试验区进行信息提取,给出了多尺度分割参数的设置规律,获得了较好的效果,总体精度为84．82%。     

Genesis of the Changba–Lijiagou Giant Pb-Zn Deposit, West Qinling, Central China: Constraints from S-Pb-C-O isotopes

The extensive Changba-Lijiagou Pb-Zn deposit is located in the north of the Xihe–Chengxian ore cluster in West Qinling. The ore bodies are mainly hosted in the marble, dolomitic marble and biotite-calcite-quartz schist of the Middle Devonian Anjiacha Formation, and are structurally controlled by the fault and anticline. The ore-forming process can be divided into three main stages, based on field geological features and mineral assemblages. The mineral assemblages of hydrothermal stage I are pale-yellow coarse grain, low Fe sphalerite, pyrite with pits, barite and biotite. The mineral assemblages of hydrothermal stage II are black-brown cryptocrystalline, high Fe shalerite, pyrite without pits, marcasite or arsenopyrite replace the pyrite with pits, K-feldspar. The features of hydrothermal stage III are calcite-quartz-sulfide vein cutting the laminated, banded ore body. Forty-two sulfur isotope analyses, twenty-five lead isotope analyses and nineteen carbon and oxygen isotope analyses were determined on sphalerite, pyrite, galena and calcite. The δ34 S values of stage I(20.3 to 29.0‰) are consistent with the δ34 S of sulfate(barite) in the stratum. Combined with geological feature, inclusion characteristics and EPMA data, we propose that TSR has played a key role in the formation of the sulfides in stage I. The δ34 S values of stage II sphalerite and pyrite(15.1 to 23.0‰) are between sulfides in the host rock, magmatic sulfur and the sulfate(barite) in the stratum. This result suggests that multiple S reservoirs were the sources for S2-in stage II. The δ34 S values of stage III(13.1 to 22‰) combined with the structure of the geological and mineral features suggest a magmatic hydrothermal origin of the mineralization. The lead isotope compositions of the sulfides have 206 Pb/204 Pb ranging from 17.9480 to 17.9782, 207 Pb/204 Pb ranging from 15.611 to 15.622, and 208 Pb/204 Pb ranging from 38.1368 to 38.1691 in the three ore-forming stages. The narrow and symmetric distributions of the lead isotope values reflect homogenization of granite and mantle sources before the Pb-Zn mineralization. The δ13 CPDB and δ18 OSMOW values of stage I range from-0.1 to 2.4‰ and from 18.8 to 21.7‰. The values and inclusion data indicate that the source of fluids in stage I was the dissolution of marine carbonate. The δ13 CPDB and δ18 OSMOW values of stage II range from-4 to 1‰ and from 12.3 to 20.3‰, suggesting multiple C-O reservoirs in the Changba deposit and the addition of mantle-source fluid to the system. The values in stage III are-3.1‰ and 19.7‰, respectively. We infer that the process of mineralization involved evaporitic salt and sedimentary organic-bearing units interacting through thermochemical sulfate reduction through the isotopic, mineralogy and inclusion evidences. Subsequently, the geology feature, mineral assemblages, EPMA data and isotopic values support the conclusion that the ore-forming hydrothermal fluids were mixed with magmatic hydrothermal fluids and forming the massive dark sphalerite, then yielding the calcite-quartz-sulfide vein ore type at the last stage. The genesis of this ore deposit was epigenetic rather than the previously-proposed sedimentary-exhalative(SEDEX) type.     

真三轴条件下的原状黄土增湿变形特性

为了研究复杂应力条件下原状黄土的增湿变形特性，利用改进的非饱和土湿陷真三轴仪，在测量吸力条件下对原状黄土进行双线法分级浸水增湿试验，探讨力?水耦合作用下吸力的变化特性，研究真三轴浸水试验的增湿变形特性，以及吸力、净围压、中主应力和应力比对增湿变形的影响。研究结果表明：由ei-lgp压缩曲线确定了非饱和土的屈服点，屈服点之前，曲线的斜率近似相等；屈服点之后，曲线的斜率随着初始吸力的减小而减小，且非饱和土与饱和土的交点随着初始吸力的增大呈右下方移动趋势。等向压缩过程中，吸力随着净平均应力的增加近似呈线性减小趋势，初始吸力越小，吸力减小的速度越慢，且吸力变化量越小。均压分级浸水增湿时，吸力s随着浸水量w的增加而减小，增湿体变 随着浸水量w的增加而增大，不同净围压下的 -w关系曲线相互有交叉。交叉区域之前，净围压越大，增湿体变越小，而交叉区域之后，净围压越大，增湿体变越大。在同一净围压条件下，浸水量相同时，初始吸力越大，增湿体变越大。真三轴剪切增湿试验中，应力比k、中主应力参数b值和净围压?3皆对增湿变形有一定的影响。当q/p≤1时，增湿变形曲线前段下凹后段上凹，主要表现为体积增湿变形；当q/p>1时，增湿变形曲线只有下凹部分，主要表现为剪切增湿变形。增湿变形曲线的形态取决于k值和b值的不同组合。     

兴隆60 cm望远镜主焦CCD系统测光性能的研究

对兴隆６０ｃｍ望远镜主焦ＣＣＤ系统的测光性能进行了测试和研究．测定了ＣＣＤ快门时间函数,讨论了快门延迟效应对短时间曝光观测的可能影响．通过观测大批Ｌａｎｄｏｌｔ标准星,较准确地定出了ＢＶＲＩ宽带测光的星等系统转换关系,结果表明本系统与标准ＢＶＲＩ系统很接近．对ＣＣＤ系统的天文测光精度作了仔细的检验和分析,并对ＰＳＦ拟合测光和孔径测光两种方法进行了比较     

Research on the spatial structure of karst massif

Eight spatial structure types are determined through morphology, hydrogeology, hydrology and impulse response in karst districts, with the well studied Houzhai subterranean stream in Puding, Guizhou Province as a sample research area. These types contain peak-forest basin, peak-forest laterite platform, resurrected peak-forest basin, old peak-forest-funnel depression, peak-forest-funnel, peak-forest-funnel depression, peak-cluster valley and peak-forest-doline. In the area, each of them has its respective surface and subterranean structural feature, and morphology, hydrogeology, hydrology and impulse response as well. The difference of responses of subsurface system in different spatial structure types are obtained by time series analysis, frequency spectrum research and decline curve calculation of material current. According to the analysis of the aquifer feature, the upper reaches of suburfall stream is dominated by pipeline flow, the lower reaches is characterized by braided fissure flow drainage system and mixed characteristic exists in the middle reaches. The result of the impulse test shows that the large ascending range of stage in the test on swash condition is in fissure system. However, in pipeline type, especially in the subterranean stream where there is waterfall or incomplete fill of underground water, the ascending range of stage is one quantity level less than the impulse range of stage at some fissure types, showing that change range of stage can indicate the spatial structure characteristics of certain area upper the station. The main direction of karst geomorphic evolution there is positive course except in the west area. It can be seen that karst geomorphological evolution direction can change when discharge datum plane influences some part of a relatively large drainage. In certain time unit, the upper reaches are controlled by old datum plane and the lower reaches by new datum plane. Two opposite geomorphological evolution directions can exist in one drainage.     

药品管理程序设计

为使药品管理摆脱繁琐的手工操作,减少差错,提高效率,用微机替代手工操作,实现药品管理系统化、程序化、自动化。本设计较好地实现了上述目标。     

遥感技术在大面积天然草地估产和预报中的应用探讨

利用新疆北疆地区不同草地类型上观测的草地可食产量、环境与遥感资料等,使用3S技术进行了相关分析和遥感估产及预报,建立了地面光学和线性或非线性遥感估产及产量预报模型,在实际估产和产量预测中加以应用、检验,并给出了生态学解释。     

中国煤型气区的构造环境、典型气藏及勘探方向Ⅰ——上古生界煤型气

主要论述以上古生界为烃源岩的典型煤型气藏的地球化学特征、形成时的构造环境与气藏类型及找气前景。华北聚煤区为最有利地区,并总结出煤型气藏形成的２种构造环境和４种成藏类型：裂谷活动构造环境中的古潜山自生自储型（苏桥型）、古生新储型（文留型）和克拉通稳定构造环境中的复合型（鄂尔多斯型）及自生自储型。前述４种气藏类型应为今后该区煤型气勘探的主要类型。此外,还对上述两种构造环境中的煤层气问题进行了扼要讨论。