云南景东县卜勺磁铁矿矿床地质

磁铁矿矿体似层状、透镜状赋存于淇海岩组中上一中部的钠长绿泥片岩、钠长绿泥绿岩、钠长绿帘绿泥片岩中,严格受层位、岩性和构造的控制。     

云南景东文玉火山热液型铜矿

铜矿赋存在三叠系上统小定西组火山岩系中,岩浆期后热液对矿质的运移、改造、叠加起重要作用。矿床具中低温火山热液蚀变特征。     

Politics,Public Space,and Memorials: The Brawl on the Mall

This paper examines recent proposals for memorials and monuments on the National Mall in Washington, DC. Demands for memorials are increasingly at odds with the Mall's important role as open green space and public protest space. This article analyzes the broader issues embodied in the competing purposes of this highly visible public space by considering the recent controversy over the World War II Memorial. The controversy focused primarily on the location of the memorial. Opponents contended the World War II Memorial would interrupt or destroy the iconography of the National Mall. Supporters argued that the location selected for the memorial was consistent with its importance in U.S. history and that it deserved such a prized location in the central axis between the Lincoln Memorial and the Washington Monument. The article then analyzes the politics behind the site selection, and examines the debate about the impact of the memorial's location. It concludes that the location of the memorial was not accidental but intentional, and thereby reveals a purposeful re-writing of the Mall's symbolic space to suit a specific vision of the war and its meaning in American history. The article also contends that the location of the memorial represents an emerging social-political agenda that is prioritizing the Mall as a place of commemoration at the expense of open space, and, perhaps, at the expense of public protest space.     

网络消费时空演变及区域联系特征研究——以京东商城为例

网络消费发展为区域经济增长带动新的动力,对网络消费的时空演变和区域联系特征研究,有助于深入的理解网络消费市场的空间组织关系。采用京东商城网上购物评论的用户信息数据,来研究网络消费时空演变趋势及网络消费区域联系特征。选取网络消费数量、万人网络消费人数、变异系数、Theil指数等指标,分析网络消费的发展过程和区域差异,结果表明网络消费增长早期较为缓慢,从2007年开始进入加速阶段,网络消费增长呈现东部高、中西部低的特征,并且东中西三大地带内发展差异显著。通过空间联系强度分析发现,中西部地区网络消费空间联系强度低于东部地区,但区域空间联系网络由不均衡逐渐向均衡状态转变。同时,研究表明网上零售企业的物流配送等要素布局对网络消费的区域联系具有显著影响。     

云南景东里竹山铁矿成矿规律

里竹山铁矿赋存在马邓岩群外麦地岩组中,成矿与区内基性火山岩(玄武岩)相关,矿石与围岩均具有相似特征。后期热变质作用、叠加改造作用并未完全改变其原岩结构构造特征,属于构造和海底基性火山喷发有关的沉积变质型磁铁矿床。     

中国省域信息流、资金流强度的空间差异——以2015年京东手机交易为例

以京东七大物流中心及其覆盖范围划分省市群。将抓取得到的京东商城2015年手机交易记录与中国统计年鉴相关数据相结合,研究影响信息流和资金流（简称“双流”）强度的可能因素,重点分析省域层面“双流”强度的空间差异,研究结果表明：① 信息基础设施、经济发展水平等已取代地理距离,成为影响“双流”强度的主要因素;② 广东、北京、上海、江苏、浙江等省市为“双流”核心区;③ 网络资金流量分层现象明显,呈“金字塔”形分布;④ 各省市群之间的空间联系存在差异,北京、上海、广东所在省市群的空间联系明显高于其它省市群;⑤ 各省市群内部成员发展不平衡,中心省市对“双流”贡献力最大。