陕西宁陕—户县地区商丹构造带北侧TTG岩系元素地球化学及其构造意义

陕西宁陕－户县地区商丹构造带北侧发现的花岗质片麻岩为古老侵入体，主要由黑云斜长片麻岩，黑云角闪斜长片麻岩，角闪斜长片磨岩等类型岩石组成，具有TTG岩系的组成特征，元素地球化学特征反映其形成于类似岛弧构造环境。     

Tectonic Dynamic Metallization of Silver-GoldHydrothermal Fluids in Proterozoic GneissTerrene Shear Zones, Suichang, Zhejiang, China

-,The well-known Suichang silvengold field is located inZhejiang Province of SOutheast China. It is the largest silver-gold deposit associated with copper and zinc in the Cathaysianmetallogenic province.There are a series of silver-gold dePOsits in the shear zonesof Proterozoic gneiss terrene, Suichang region. The volcanicapparatus at Mesozoic has complicated rpineralization. Respectively, there are two pieces of understanding on the origin ofore-formigg nuid: (l ) metamorphic fluid (Lia…     

农业生态的化学元素分类及其与作物优质高产的关系

利用国家科学技术成果，并根据国内外研究现状，将103个化学元素分成对作物生长发育、增产起显著作用、起一定作用、起有害作用和起未知作用4个农业生态元素类型，进而论述了它们与作物优质高产的关系。     

用边界单元法模拟二维地形对大地电磁场的影响

本文用边界单元法模拟二维地形对大地电磁场的影响.首先用格林公式将二维大地电磁的边值问题转变成积分方程,然后用边界单元法解积分方程,得到地形上的大地电磁场和它的法向导数,由此可计算电阻率.与有限单元法相比,本方法剖分后的地形与实际地形的拟合程度高,向计算机输入原始数据的工作简单,可以在微机上计算地形引起的视电阻率.本方法适合于在野外生产现场进行大地电磁法的地形改正.计算表明,地形对H_x型波的影响比对E_x型波严重得多;随着周期的增长,地形对H_x型波的影响变得稳定.     

航空影像与数字地面模型的配准

介绍了一个通过确定航空摄影飞机的空间位置和姿态来辅助飞机导航的算法。该算法将航摄像片与已知数字地面模型配准，从而获取像片（飞机）的空间位置和姿态。     

内蒙造山带南部古板块构造演化

对内蒙造山带南部构造岩石组合、构造序列和部分岩石的同位素年龄研究表明，华北板块北缘在中元古代由大陆裂谷发展成被动陆缘，晚元古代开始转为活动陆缘，延续至早古生代转为俯冲－左旋走滑。随着温都尔庙蛇绿岩的定位和俯冲带北移、贺根山蛇绿岩的定位，内蒙造山带南部分别经历了两次均衡抬升－裂陷。海西末期华北－西伯利亚两大板块已缝合，进入超碰撞阶段，区内花岗岩大量侵位并形成了一系列推覆构造。     

On the Parameterisation of the Effective Roughness Length for Momentum Transfer over Heterogeneous Terrain

We develop a parameterisation for the effective roughness length of terrain that consists of a repeating sequence of patches, in which each patch is composed of strips of two roughness types. A numerical model with second-order closure in the turbulent stress is developed and used to show that: (i) the normalised Reynolds stress develops as a self-similar profile; (ii) the mixing-length parameterisation is a good first-order approximation to the Reynolds stress. These findings are used to characterise the blending layer, where the stress adjusts smoothly from its local surface value to its effective value aloft. Previous studies have assumed that this adjustment occurs abruptly at a single level, often called the blending height. The blending layer is shown to be characterised by height scales that arise naturally in linear models of surface layer flow over roughness changes, and calculations with the numerical model show that these height scales remain appropriate in the nonlinear regime. This concept of the blending layer allows the development of a new parameterisation of the effective roughness length, which gives values for the effective roughness length that are shown to compare well with both atmospheric measurements and values determined from the second-order model.     

对"工业指标"制定及应用的探讨

工业指标的"多年一贯制"不利于合理充分地利用矿产资源,文章提出适合经济规律的工业指标制定办法,建议地质技术人员按照矿山年总成本和矿产品市场价格及时修正工业指标,以便使项目上马决策趋于正确.