造山带异源浆混花岗岩理论与方法研究

1：5万花岗岩填图方法在区调工作中推广以来,在造山带花岗岩调查实践中,由于造山作用及过程的复杂性,花岗岩浆的多源及多样性,使同源岩浆演化理论及方法遇到了难题。文章在新一轮1：25万造山带试点图幅,在对同源岩浆演化理论及方法的适用性进行探索的同时,提出了异源浆混理论指导造山带内部浆混花岗岩（H型花岗岩）的填图方法。并就异源浆混花岗岩鉴别标志等作了系统总结,提出了浆混组合、浆混单元、浆混体,填图的理论方法体系;给予了浆混花岗岩明确的定义。     

新疆若羌县维宝铅锌矿床地质特征及成因分析

维宝铅锌矿床位于祁漫塔格成矿带西段,矿床产于元古界蓟县系狼牙山组浅海相碎屑-碳酸盐岩系地层中,矿体具有明显的层控性,以及多阶段矿化特点。文章在深入分析矿床地质特征及成因的基础上,提出了该矿床在成因上属后生层控多金属矿床,并总结了找矿标志,认为在东昆仑-祁漫塔格地区具有较大的找矿前景。     

Study on Recovering the Earth＇s Potential Field Based on GOCE Gradiometry

Given the second radial derivative Vrr（P） ｜δs of the Earth＇s gravitational potential V（P） on the surface δS corresponding to the satellite altitude, by using the fictitious compress recovery method, a fictitious regular harmonic field rrVrr（P）^＊ and a fictitious second radial gradient field V：（P） in the domain outside an inner sphere Ki can be determined, which coincides with the real field V（P） in the domain outside the Earth. Vrr^＊（P）could be further expressed as a uniformly convergent expansion series in the domain outside the inner sphere, because rrV（P）^＊ could be expressed as a uniformly convergent spherical harmonic expansion series due to its regularity and harmony in that domain. In another aspect, the fictitious field V^＊（P） defined in the domain outside the inner sphere, which coincides with the real field V（P） in the domain outside the Earth, could be also expressed as a spherical harmonic expansion series. Then, the harmonic coefficients contained in the series expressing V^＊（P） can be determined, and consequently the real field V（P） is recovered. Preliminary simulation calculations show that the second radial gradient field Vrr（P） could be recovered based only on the second radial derivative V（P）｜δs given on the satellite boundary. Concerning the final recovery of the potential field V（P） based only on the boundary value Vrr （P）｜δs, the simulation tests are still in process.     

像素级遥感图像融合方法研究

多传感器遥感图像融合按信息表征层次的不同,可以分为像素级融合、特征级融合和决策级融合。本文介绍了像素级层次上的多种遥感图像融合方法,阐述了其融合原理和实现过程,分析了它们适用性和优缺点,并给出了遥感图像融合的一般评价指标。     

多因子影响的地图居民地自动聚群与综合研究

提出了地图综合目的的居民地聚群需要遵循Gestalt的邻近性、相似性和方向性原则,描述居民地结构、形态及其关系需要6个因子,即居民地间的距离、可视区域面积、大小相似度、形状相似度、方向关系、居民地内部方向;进而运用这些原则和因子,给出了居民地的自动聚群和综合方法.     

Macrofaunal Spatial Patterns in Relationship to Environmental Variables in the Richibucto Estuary,New Brunswick,Canada

Estuarine macrobenthos respond to a variety of environmental gradients such as sediment type and salinity, and organic enrichment. A relatively new influence, organic loading from suspended bivalve culture, has the potential to alter this response. A study on soft-bottom macrobenthic communities was carried out in the Richibucto estuary (46°40′N, 64°50′W), New Brunswick, Canada, with samples collected from 18 stations in late September and early October 2006. The site consisted of a large tidal channel originating upstream in a small river. The channel was punctuated by bag culture of oysters along its length. A total of 88 species were recorded. The mean values of abundance, species richness, and diversity (H′) of macrofauna were 11,199 ind. m⁻² (ranged from 4,371 to 19,930 ind. m⁻²), 23.4 species grab⁻¹ and 3.29 grab⁻¹, respectively. In general species richness and H′ increased from the upper estuary to the estuarine mouth. Multivariate analyses clearly exhibited the spatial distribution in community structure, which coincided with the locations along the estuary (the upper, the lower and the mouth), as well as inside and outside the channel. Species richness and diversity H′ showed strong positive correlations with salinity (21.2–25.2 ppt), and abundance was positively correlated with water depth (1.0–4.5 m). Abundance and species richness were negatively correlated with both of silt–clay fraction (3.3–24.8%) and sorting (σ_I). Species richness was also negatively correlated with organic content (1.9–12.7%). The BIO-ENV analyses identified silt–clay fraction, σ_I and salinity as the major environmental variable combination influencing the macrofaunal patterns, and silt–clay fraction as the single best-correlated variable.     

高程控制测量中的混合构网法

针对目前常规水准测量在山区公路高程控制测量中的局限性,本文提出了一种三角高程与常规水准测量相结合的混合构网方法,并通过实例得出,这种方法充分利用了两者的优势,在保证成果的可靠性和精度的同时,大大提高了工作效率,缩短了生产周期。     

填土表面倾斜时的主动土压力计算

支护结构工程中,当坡顶填土表面倾斜时,无法采用常规的土压力理论进行计算。探讨了《建筑边坡工程技术规范》存在的问题,提出了推荐方法。通过算例验证了推荐方法,具有计算简单、计算结果合理的优点,可供工程设计中参考使用。     

基于COM/AutoCAD的SPOT5卫星影像地物半自动成图方法

对使用COM ActiveX自动控件接口操作AutoCAD进行介绍,针对利用SPOT5 HRS立体影像进行地物要素成图问题提出基于COM/AutoCAD的矢量化方法,并着重阐述利用该方法制作1∶50 000地形图的主要问题。     

基于边界反走样算法的地图可视化研究

在现有反走样算法的基础上提出了一种适合于地图可视化的边界反走样算法,并通过试验对该方法的反走样效果和效率进行了测试,在地图可视化中得到了较好的应用.