国际宜商城市的投资环境评价

本文通过对世界上60座最宜经商城市基本状况的分析，指出了宜商城市投资环境评价的基本内容，并依此对国际性投资的城市选择提出若干建议。     

SOME EMPIRICAL EXAMPLES OF CENTRAL PLACE MODEL IN CHINA''S RURAL AND URBAN STUDIES

Sincethe195Os,theCentralPlaceTheory(Cpp)hasbeenprevailingallovertheWest.Nevertheless,theaPplicationofthismodelinChinasplanningworkusedtobeanargUableproblem.Negativeviewswerefl.thehyPothesisabouttl1enatUralandhumanhomogeneityisdevoicedfromthereality;2.thetheorytvasge11eratedfrol11caPitalistsociety,wherethehistorical,socialandeconomicconditionsaredifferentfromChina's.Inrecentyears,theauthorshavetriedtoapplyCppmode1toChina'Surbanal1dregionalplanning,thesatisfactoryresu1tsprovedthegenera1ada…     

民用航空气象观测综述

介绍了民用航空气象观测这一全球大气监测网中的重要观测平台的发展历史，航空气象资料的特点及其在气象业务与大气科学研究中的应用现状，详细分析了航空气象资料的获取、优势、存在的局限和未来的改进方向。指出民用航空飞机观测这一常规大气探测手段具有广阔的应用前景，受到了气象部门和航空业的共同重视，航空气象资料对提高天气预报准确率和气象服务水平将起到积极的促进作用，在未来的数值天气预报业务和大气科学研究中占据越来越重要的地位。     

广州市地铁沿线地下商业空间的利用对比分析

选取广州市与地铁站出口相连的天浚和流行前线地下商业街为研究对象，运用市场研究中消费者行为分析和实地考察的方法，分别对二者的特征、消费者属性进行比较并对地下商业街与消费者属性之间的关系进行分析，得出4点结论：（1）区位条件是影响零售业布局的关键因素；（2）历史悠久、建筑风格独特、服务功能多样、基础设施完备、环境舒适、管理有序的商业街更易受顾客青睐；（3）不同的消费群体在对商业街的选择上表现出不同的偏好；（4）地铁将带动快速、简易的消费模式。     

从经济学角度分析我国气象服务商业化运作模式的选择

从经济学的角度分析了目前世界上三种气象服务商业化运作模式的利弊，从而提出我国气象服务商业化运作应该选择的模式：即国家气象部门只搞公益无偿服务，由私人公司开展商业化服务。     

Comparison of Two Probability Distributions Used to Model Sizes of Undiscovered Oil and Gas Accumulations: Does the Tail Wag the Assessment?

Undiscovered oil and gas assessments are commonly reported as aggregate estimates of hydrocarbon volumes. Potential commercial value and discovery costs are, however, determined by accumulation size, so engineers, economists, decision makers, and sometimes policy analysts are most interested in projected discovery sizes. The lognormal and Pareto distributions have been used to model exploration target sizes. This note contrasts the outcomes of applying these alternative distributions to the play level assessments of the U.S. Geological Survey's 1995 National Oil and Gas Assessment. Using the same numbers of undiscovered accumulations and the same minimum, medium, and maximum size estimates, substitution of the shifted truncated lognormal distribution for the shifted truncated Pareto distribution reduced assessed undiscovered oil by 16% and gas by 15%. Nearly all of the volume differences resulted because the lognormal had fewer larger fields relative to the Pareto. The lognormal also resulted in a smaller number of small fields relative to the Pareto. For the Permian Basin case study presented here, reserve addition costs were 20% higher with the lognormal size assumption.     

焉耆盆地三工河组储层流体包裹体形成期次分析

焉耆盆地三工河组流体包裹体具有丰度低、个体小的特征,并以液态烃相包裹体为主,主要分布在石英颗粒的溶孔或溶缝当中。结合盆地成岩作用和有机质演化历史分析,认为它们形成于侏罗纪晚期的以压溶和溶蚀作用为特征的晚成岩作用阶段。包裹体均一温度呈双峰型分布,具有 10 1~ 110℃和 12 1~ 130℃两个区间,结合焉耆盆地的埋藏史和盆地的热史,这两个温度区间分别对应于晚侏罗世和侏罗纪末期。包裹体组份特征分析也证实该地区存在两期包裹体,并且包裹体组分主要是在烃源岩低成熟阶段形成的。可以认为,焉耆盆地三工河组储层的流体包裹体主要是在晚侏罗世烃源岩的低成熟阶段和侏罗纪末期烃源岩的成熟阶段形成。     

Equivalent Permeability and Simulation of Two-Phase Flow in Heterogeneous Porous Media

The problem of calculating equivalent grid block permeability tensors for heterogeneous porous media is addressed. The homogenization method used involves solving Darcy's equation subject to linear boundary conditions with flux conservation in subregions of the reservoir and can be readily applied to unstructured grids. The resulting equivalent permeability tensor is stable as defined relative to G-convergence. It is proposed to use both conforming and mixed finite elements to solve the local problems and compute approximations from above and below of the equivalent permeability, respectively. Comparisons with results obtained using periodic, pressure and no-flux boundary conditions and the renormalization method are presented. A series of numerical examples demonstrates the effectiveness of the methodology for two-phase flow in heterogeneous reservoirs.     

山城重庆商业中心空间特征与调适性发展

运用调适理论探讨重庆市商业中心如何结合山地自然生态特征和人文生态特征，走向可持续发展的理论与方法，并提出具体对策和目标。     

商圈惠顾行为的空间衰减：幂律模式还是指数模式

以上海市商业中心为例,基于匿名手机信令数据,运用引力模型对商圈惠顾行为的衰减模式及其系数进行了验证与对比。结果表明,① 对于商圈惠顾行为,最常用的2种距离衰减函数均具有较高的拟合优度,幂律函数稍优于指数函数;② 总体来看,距离仍是影响城市居民商圈惠顾行为的关键因素,距离衰减效应呈现出随商业中心等级增大而减弱的梯度特征,幂律型衰减系数取值1~3不等,采用既定系数1或2会过高/低估计商圈辐射能力;③ 不可忽视闲暇时间对商圈惠顾行为的约束作用,与周末相比,工作日的距离衰减系数较大,且商业中心等级越低,商圈惠顾行为的衰减性越显著。