NOAA AVHRR 1B数据的几何精纠正

文文在对ＮＯＡＡ－ＡＶＨＲＲ像元畸变特点分析和ＩＢ格式中的定位数据质量评价基础上，确定ＩＢ格式中的定位数据。尽管绝对精度很差，但相对精度较好，可以用来进行像元的相对定位，确定像元的大小和形状，在此基础上，提出了ＮＯＡＡ－ＡＶＨＲＲ像元畸变校正方法。校正后的图像经多项式纠正后，多时相复合和与辅助数据相复合的效果很好，误差为半个像元级。     

东北冷涡的时空分布特征及其与东亚大型环流系统之间的关系

文章用３５年（１９５６－１９９０）资料，对东北冷涡的时空分布特征，及其与东亚大型环流系统之间的关系做了研究，发现东北冷涡的出现不仅在时间上有相对的集中期，在地理分布上有着明显的密集性，并且东亚地区阻塞高压的异常发展及位置变化、西太平洋副高的强度及位置变化等对东北冷涡的形成和发展均具有至关重要的影响。      

辉石中(2n 1)×0.45um宽度堆垛的结构观察与模型推导

在斜顽辉石加温产物中观察到1．35和2．25um宽度堆垛，前者属单斜晶系。这些（2n＋1）×0．45um宽度堆垛可以由辉石的Si－O链错排引起。按单斜辉石或斜方辉石的Si（A）、Si（B）链结构数据所计算的1．35um堆垛，多属单斜晶系，晶胞参数范围是a＝1．357～1．420，b＝0．886，c＝0．516nm，β＝96．1°～108．3°；当斜方辉石的Si－O链作Si（A）Si（B）St（B′）排列时，1．35um堆垛应为斜方晶系。计算的2．25um堆垛的晶胞参数是a＝2．255，b＝0．886，c＝0．516nm，β＝73．8°。     

DCS－偶氮胂光度法测定钛酸锶烧结物中游离的氧化锶

ＤＣＳ－偶氮胂光度法测定钛酸锶烧结物中游离的氧化锶胡浩，周宏实江苏海安磷肥厂２２６６００ＤＣＳ－偶氮肿［２－（２－胂酸基苯偶氮）－７－（２，６－二氯－４－磺酸基苯偶氮）－１，８－二羟基－３，６－二磺酸萘］属双偶氮变色酸类显色剂，主要用于稀土元素的高灵...     

510—1铀矿床构造、地球化学特征及其成因探讨

本文根据510—1铀矿床形成的构造条件和地球化学特征,认为该富铀矿床的成因是地洼阶段壳幔混合型深源热液上升侵位,与贡巴—益哇逆冲推覆构造上盘中、下志留统羊肠沟组硅灰岩含水含矿层屏蔽构造相结合的结果。并指出古今统一的四维空间屏蔽构造是找矿的方向。     

One to One Resonance at High Inclination

We report results from long term numerical integrations and analytical studies of particular orbits in the circular restricted three-body problem. These are mostly high-inclination trajectories in 1 : 1 resonance starting at or near the triangular Lagrangian L₅ point. In some intervals of inclination these orbits have short Lyapunov times, from 100 to a few hundred periods, yet the osculating semi-major axis shows only relatively small fluctuations and there are no escapes from the 1 : 1 resonance. The eccentricity of these chaotic orbits varies in an erratic manner, some of the orbits becoming temporarily almost rectilinear. Similarly the inclination experiences large variations due to the conservation of the Jacobi constant. We studied such orbits for up to 10⁹ periods in two cases and for 10⁶ periods in all others, for inclinations varying from 0° to 180°. Thus our integrations extend from thousands to 10 million Lyapunov times without escapes of the massless particle. Since there are no zero-velocity curves restricting the motion this opens questions concerning the reason for the persistence of the 1 : 1 resonant motion. In the theory sections we consider the mechanism responsible for the observed behavior. We derive the averaged 1 : 1 resonance disturbing function, to second order in eccentricity, to calculate a critical inclination found in the numerical experiment, and examine motion close to this inclination. The cause of the chaos observed in the numerical experiments appears to be the emergence of saddle points in the averaged disturbing potential. We determine the location of several such saddle points in the (, ) plane, with being the mean longitude difference and the argument of pericentre. Some of the saddle points are illustrated with the aid of contour plots of the disturbing function. Motion close to these saddles is sensitive to initial conditions, thus causing chaos.This revised version was published online in October 2005 with corrections to the Cover Date.     

Minimum 1D Velocity Model from Local Earthquake Data in the Provence Region,South-Eastern France

We computed a one-dimensional (1D) velocity model and station corrections refering to the Provence region (South-eastern France) by inverting P-wave arrival times recorded on an eight-station local seismic network. Using this velocity model and the program HYPOELLIPSE (Lahr, 1989), we relocated a set of 108 local events. The quality comparison between previous earthquake locations and new relocated shows a good improvement.The obtained Minimum 1D velocity model can be used in a better-quality routine for earthquake location and represent a first step towards more detailed seismic studies in the Provence region.     

RGMAP系统在1:5万矿调中的应用

采用数字填图系统(RGMAP)开展区域地质矿产调查,已成为今后工作的必须手段.针对15万矿调中路线地质矿产调查、化探异常查证、矿(化)点踏查和检查评价等传统的矿产调查工作内容,就如何充分利用数字填图系统提供的数据模型与"3S"技术平台,提高矿调工作效率与精度,结合野外数据采集与室内数据综合应用进行了尝试性地探讨.     

Reaction of OH Radicals with Acetone: Determination of the Branching Ratio for the Abstraction Pathway at 298 K and 1 Torr

We have determined the 2-oxo-propyl CH₃C(O)CH₂ (sometimes called 1-methylvinoxy or acetonyl) radical yield for the reaction of acetone with OH radical relative to the 2-oxo-propyl yields for the reactions of F- and Cl atoms with acetone using the Discharge Flow technique. The 2-oxo-propyl radical has been monitored by Laser Induced Fluorescence LIF at short reaction times in the systems: OH + acetone (R1), F + acetone (R2), and Cl + acetone (R3). From these measurements we have deduced the branching ratio for the 2-oxo-propyl radical formation in the title reaction to be in the range 0.8 R 1.     

Application of a statistical water-table model reveals connections between dunes and vegetation at Doñana

We present a simple statistical model of the water-table fluctuations based on a set of multiple regressions for a dune slack of the Doñana National Park, and its utility to understand some ecological processes. The variation in the coefficients of the regressions for different locations allows discrimination between different zones in the dune slack, and explains the spatial pattern of heath vegetation observed in the stabilized sands. Model simulations were compared with an existing sparse data set of water-table levels, and suggests possible mechanisms responsible for the catastrophic pine tree mortality, which happened during the drought of 1979–83.