一类绕平面曲线而成的旋转体

把微积分学教材中关于旋转体的内容推广到“绕曲线”旋转的情形，给出了绕平面曲线而成的旋转面的面积公式及其若干应用     

How does landscape structure influence catchment transit time across different geomorphic provinces?

Despite an increasing number of empirical investigations of catchment transit times (TTs), virtually all are based on individual catchments and there are few attempts to synthesize understanding across different geographical regions. Uniquely, this paper examines data from 55 catchments in five geomorphic provinces in northern temperate regions (Scotland, United States of America and Sweden). The objective is to understand how the role of catchment topography as a control on the TTs differs in contrasting geographical settings. Catchment inverse transit time proxies (ITTPs) were inferred by a simple metric of isotopic tracer damping, using the ratio of standard deviation of δ¹⁸O in streamwater to the standard deviation of δ¹⁸O in precipitation. Quantitative landscape analysis was undertaken to characterize the catchments according to hydrologically relevant topographic indices that could be readily determined from a digital terrain model (DTM). The nature of topographic controls on transit times varied markedly in different geomorphic regions. In steeper montane regions, there are stronger gravitational influences on hydraulic gradients and TTs tend to be lower in the steepest catchments. In provinces where terrain is more subdued, direct topographic control weakened; in particular, where flatter areas with less permeable soils give rise to overland flow and lower TTs. The steeper slopes within this flatter terrain appear to have a greater coverage of freely draining soils, which increase sub‐surface flow, therefore increasing TTs. Quantitative landscape analysis proved a useful tool for inter‐catchment comparison. However, the critical influence of sub‐surface permeability and connectivity may limit the transferability of predictive tools of hydrological function based on topographic parameters alone. Copyright © 2009 John Wiley & Sons, Ltd.     

Synthetic information prediction system for crisis mine based on GIS

Reserves of some kinds of the crisis mines will be lack now or from now on, because of lacking seriously reserves of mineral resources and the crisis of exploring bases in support. So that it is urgent to predict, appraise, development and utilize the replaceable resources of the crisis mines. The mineral resources prediction software system of synthetic information is intelligent GIS which is used to quantitative prediction of large-scale synthetic information mineral target. It takes the geological body and the mineral resource body as a unit. And it analyzes the ore deposit genesis and metallotect, knows the spatial distribution laws of the ore deposit and ore body, and establish the prospecting modelbased on the concept of establishing the three-dimensional space of a mine. This paper will primarily discuss some important problems as follows： the secondary development of various kinds of data（ including geology, geophysical prospecting, geochemical prospecting and remote sensing, etc）; process synthetically and establish the synthetic information interpretative map base; correspond prospecting model with synthetic information of ore deposit; divided into statistical units of metallogenic information synthetic anomalies based on the synthetic information anomalies of ore control, then research the metallogenic information variable of unit synthetically and make quantitative prediction according to choose the quantitative prediction math model which is suitable to the demands of large-scale precision; at last, finish the target area optimization of ore deposit （body）.     

太阳系动力学中当前的重要课题

以当前太阳系动力学中的重要课题以及研究方法进行讨论，并提出一些看法，课题中主要讨论动力学模型，轨道共振，行星环，混沌和长期演化，近地天体运动，Kupiper带，太阳系中的引力理论，以及其他有关问题。     

浙西晚震旦世含磷地层的定量分析

本文运用最优预测面成图法（缩写“ＭＰＳ”）对浙江西部地区晚震旦世含磷地层进行了定量分析，通过各种岩性数据和地理座标的两变量之间的相关关系及趋势面分析，揭示了含磷层的沉积环境。认为沉积环境与磷矿形成有密切的关系，即在两台地之间和斜坡区的凹陷处是有利的成磷环境，而太深的地段不利于磷矿的形成。     

Quantitative petrogenetic constraints on the Pliocene alkali basaltic volcanism of the SE Spain Volcanic Province

Alkali basalts of Pliocene age are the last episode of volcanism in the SE Spain Volcanic Province, postdating a complex series of Miocene calc-alkaline to ultrapotassic rocks. This volcanism is represented by small outcrops and vents NW of Cartagena that has been interpreted as a volcanic episode similar to the contemporaneous monogenetic alkaline basaltic volcanism of the Iberian Peninsula and Western/Central Europe. However, their geochemical signature is characterised by relatively higher ⁸⁷Sr/⁸⁶Sr ratios as well as distinct trace element anomalies which, at different scale, are only found in the spatially related calc-alkaline to ultrapotassic volcanism. Quantitative modelling of these data demonstrate that the geochemical signature of the Pliocene alkali basalts of Cartagena can be explained by the interaction between primitive melts generated from a sublithospheric mantle source similar to that identified for other volcanic regions of Spain, and liquids derived from the overlying lithospheric mantle. This interaction implies that the alkali basalts show some geochemical features only observed in mantle lithosphere-derived melts (e.g. Sr isotope enrichment and Th–U–Pb positive anomalies), while retaining an overall geochemical signature similar to other Iberian basalts (e.g. Rb–K negative anomalies). This model also implies that beneath the SEVP, enriched (metasomatized) portions were still present within the lithospheric mantle after the Miocene magmatic episodes.     

基于遥感反演的山东省森林资源调节温度服务的研究

森林生态服务的量化研究是森林生态服务评估的关键之一。利用TM数据、实际采集的外业数据、山东气象数据,对山东省不同树种、不同时间森林调节气温的生态服务进行了量化分析。主要结论有:温度和森林的NDVI(归一化植被指数)是负相关的关系,NDVI值越高,温度越低;森林温度变化的振幅比农田、城镇都小,森林对温度的调节作用比农田大;不同类型的降温效果不同,在不同的季节降温作用也不一样。在分析时,限定了分析的条件,森林对气温的实际调节作用远大于分析的结果。     

1990-2006年中国农业可持续发展定量分析

以可持续发展理论为指导,尝试构建中国农业可持续发展综合评价指标体系,围绕人口、经济、资源生态、社会公平4个维度选取了28个指标,经AHP方法给指标赋权,运用综合指数模型对1990-2006年中国农业可持续发展水平和各维度间的协调度进行定量分析．研究结果表明：中国农业可持续发展水平综合得分逐年增高,人口、经济、资源生态、社会公平4个维度间协调度得分稳步上升．资源生态、经济、人口子系统可持续发展态势良好,社会公平性较差．据此,本研究认为,实现中国农业可持续发展一定要牢固树立农业可持续发展的科学发展观;高度重视人口、经济、资源生态和社会公平的协调发展;迅速提升农业劳动力素质;大力发展环境保护型农业．