端部嵌固桩的负摩擦力的弹性解

本文建立了在含水层疏水压缩过程中端部嵌固的负摩擦力的弹性计算模型，并将其分解为三个简单的子问题分析求解，然后用应变协调条件将它们联系起来，得到了一组负摩擦力的计算公式。     

农业气象条件对黍产量的影响

本文指出,黍产量在很大程度上决定于从播种到出苗和从籽粒形成到成熟这两个生育期的农业气象条件。叙述了苏联欧洲东南部地区各省平均黍产量的预报方法。     

舌状三角洲和鸟足状三角洲形成及演变的沉积模拟实验

本实验是在美国科罗拉多州立大学地球资源系的一个长6m?宽4.5m?高0.8m的水槽内进行的?实验中保持流量?含沙量?粒度级配等参数不变,仅改变湖平面高程?实验分三个阶段进行,即:Ⅰ.湖平面固定;Ⅱ.湖平面由高逐渐降低;Ⅲ.湖平面由低逐渐升高?本文着重提出入湖斜坡区的坡度控制着舌状三角洲?鸟足状三角洲的形成?演变;对舌状三角洲的成因提出新的观点;用三角洲沙体的宽厚比值作为识别舌状三角洲和鸟足状三角洲的另一个重要标志,这对于从事石油天然气勘探是很有意义的?     

从对地观测到对人观测——浅析社会地理计算

It is possible to obtain vast amounts of spatiotemporal data related to human activities to support the study of human behavior and social evolution.In this context,geography,with the human-nature relationship as its core,is undergoing a transition from strictly earth observations to the observation of human activities.Geocomputation for social science is one manifestation thereof.Geocomputation for social science is an interdisciplinary approach combining remote sensing techniques,social science,and big data computation.Driven by the availability of spatially and temporally expansive big data,geocomputation for social science uses spatiotemporal statistical analyses to detect and analyze the interactions between human behavior,the natural environment,and social activities;Remote sensing(RS)observations are used as primary data.Geocomputation for social science can be used to investigate major social issues and to assess the impact of major natural and societal events,and will surely be an area of focused development in geography in the near future.We briefly review the background of geocomputation in the social sciences,discuss its definition and disciplinary characteristics,and highlight the main research foci.Several key technologies and applications are also illustrated with relevant case studies of the Syrian Civil War,typhoon transits,and traffic patterns.