长三角主要空港经济区产业结构演变与优化

空港地区产业演变研究是产业结构优化的重要依据,对长三角六大主要空港经济区产业发育现状以及1999—2013年各区产业结构的历史演变分析表明:总体上,制造业比重持续最高,但已逐步下降,运输业对制造业挤占效应明显。服务业比重稳定在20%左右,商务服务业普遍较弱。行业上,一是零售业、设备制造业快速增长,制造业临空指向有所增强;二是物流业明显受制于机场规模;三是各区大部分行业相同,亦存在区域特色。在归纳世界知名空港经济区模式的基础上,将实证空港经济区与之进行相似度分析,选择各区适宜的发展模式。     

综合物探方法在机场滑行道地裂缝探测中的应用

地裂缝是地质灾害中地面变形灾害之一,其发生频率和灾害程度逐年加剧。本文依托机场滑行道地裂缝现状,应用地质雷达探测与高密度地震映像勘探相结合的探测方法,综合研究分析地裂缝的发育特征,为地裂缝灾害的治理提供依据。     

对接井钻井靶点位置问题探讨

传统观念认为从钻井轨迹的计算得出的中靶精度即为实际中靶精度,随着钻井技术及测量技术的不断发展,这种观念在被逐渐打破。在数学计算模型中的靶点位置与实际的靶点位置有相当大的出入,即使使用主动磁测量技术测得的靶点位置也是存在不确定性。由H1-H2井组的对接施工过程作为案例,分析出现这种不确定性的原因,以及在施工中采取主动的手段完成工程任务,以达到施工目的。     

A conceptual–numerical model to simulate hydraulic head in aquifers that are hydraulically connected to surface water bodies

In this paper, we present a conceptual‐numerical model that can be deduced from a calibrated finite difference groundwater‐flow model, which provides a parsimonious approach to simulate and analyze hydraulic heads and surface water body–aquifer interaction for linear aquifers (linear response of head to stresses). The solution of linear groundwater‐flow problems using eigenvalue techniques can be formulated with a simple explicit state equation whose structure shows that the surface water body–aquifer interaction phenomenon can be approached as the drainage of a number of independent linear reservoirs. The hydraulic head field could be also approached by the summation of the head fields, estimated for those reservoirs, defined over the same domain set by the aquifer limits, where the hydraulic head field in each reservoir is proportional to a specific surface (an eigenfunction of an eigenproblem, or an eigenvector in discrete cases). All the parameters and initial conditions of each linear reservoir can be mathematically defined in a univocal way from the calibrated finite difference model, preserving its characteristics (geometry, boundary conditions, hydrodynamic parameters (heterogeneity), and spatial distribution of the stresses). We also demonstrated that, in practical cases, an accurate solution can be obtained with a reduced number of linear reservoirs. The reduced computational cost of these solutions can help to integrate the groundwater component within conjunctive use management models. Conceptual approximation also facilitates understanding of the physical phenomenon and analysis of the factors that influence it. A simple synthetic aquifer has been employed to show how the conceptual model can be built for different spatial discretizations, the parameters required, and their influence on the simulation of hydraulic head fields and stream–aquifer flow exchange variables. A real‐world case was also solved to test the accuracy of the proposed approaches, by comparing its solution with that obtained using finite‐difference MODFLOW code. Copyright © 2011 John Wiley & Sons, Ltd.     

武宿机场新航站楼冬季供热系统设计及技术经济分析

本文介绍了太原武宿机场新航站楼冬季供热采暖和空调双系统的设计及五年来的运行效果。对采暖系统的初投资、空调系统各类设备用电量、每个采暖季的运行费用、投资回收期等进行了分析比较;讨论了在冬季供热中,用采暖系统替代在建筑中使用中央空调系统的优势。     

陆相成熟烃源岩区连通砂体对油气运移的控制作用

基于成熟烃源岩稳态连续排烃机制,分析陆相成熟烃源岩区内连通砂体对油气运移的控制作用,并深入探讨烃源岩内砂体与烃源岩的接触面积、砂泥互层烃源岩层系中砂岩含量、砂体物性、砂体分布及其连续性对排烃效率的影响。结果表明:将连通砂体与烃源岩的接触类型分为垂向沉积相变接触型、侧向沉积相变接触型及交错复合接触型,其中前两者是烃源岩-连通砂体的主要接触类型;烃源岩-连通砂体配置组合以在异常压力驱动下的稳态连续排烃为主;烃源岩内砂体与烃源岩的接触面积越大、砂岩含量越大、砂岩物性越好、砂体分布稳定及连续性好有利于成熟烃源岩排烃,则排烃效率越大,进而控制主要排烃方向和资源量。烃源岩内连通砂体对油气二次运移的作用主要取决于其与烃源岩外连通砂体的分布连续性与物性连通性。如果烃源岩内砂体是孤立的,油气无法运移出烃源岩区,则形成烃源岩内油气藏;如果烃源岩内砂体与烃源岩外砂体分布连续且物性连通,则油气运移距离大,可在更为有利的圈闭分布区成藏。     

K_(1,n)-free图有(g,f)-因子的最小度条件

讨论了图的(g,f)-因子存在问题,并给出了K1,n-free图有(g,f)-因子的一个最小度条件。     

双塔连体结构弹塑性时程分析

双塔连体结构是我国实际工程中应用越来越多的一种结构形式.该结构形式是在两塔楼顶部设置连体部分的新型建筑结构形式.本文针对某一连体结构,采用NosaCAD有限元软件建立整体结构分析模型.通过建立模型,分析结构在7度多遇和罕遇地震下的弹塑性时程反应,得到结构在地震作用下的变形、内力和破坏情况的变化过程.结果表明,小震情况下...     

����AutoCAD VBA��ֱ������������������

???????AutoCAD????????????????????????÷?????????????????????????????????????????????????????????VBA?????????????б?д???????????о?????????????????????κ????????????????????????????????????о??????????????????????????????????????λ?÷??????????????????÷???????????????á????????Ч???????????????????????????????????     

飞机场设施CGCS2000坐标测量方法设计与研究

针对飞机场各种设施测量实际,通过几种方案的分析、比较、融合,设计了一种高效的中国民航机场设施CGCS2000坐标测量的方案,在民航机场CGCS2000坐标测量中得到了有效验证。