电子商务影响下的“淘宝村”乡村重构多维度分析——以湖北省十堰市郧西县下营村为例

以湖北省十堰市郧西县下营村为例,利用半结构式访谈、问卷调查并结合遥感影像解译与GIS可视化表达等方法对电子商务驱动下乡村经济、社会及空间重构进行刻画。研究表明：① 下营村由传统的农业主导转变为一、二、三产业融合发展的多元结构,并显露出生态化转向。② 社会空间趋向于就业高度非农化、治理主体多元化、公共服务健全化、生活方式现代化及交往空间虚拟化。③ 农业生产空间逐步压缩,非农生产空间逐步扩张,生产-生态复合空间增加,居住空间呈现多功能化、集约化。④ 产业基础、电商平台、物流设施、乡村精英、资源禀赋和政府支持为其转型与发展提供了初始引擎、资源支撑和外部支持。     

Rural vitalization in China: A perspective of land consolidation

Journal of Geographical Sciences - The core objective of rural vitalization is to systemically establish a coupling pattern of various rural development elements including population, land and...     

陕西安康地区金、铜矿床地质及其成矿条件

新发现的低品位金矿与铜矿,主要类型浊积岩型、卡林型金矿和脉型与层控型铜矿,主要分布在紫阳—岚皋深大断裂和下古生代地层中。在适宜地质背景了解基础上,通过对含矿岩系,岩体与构造热液控矿特征和金、铜成矿条件分析,认为在安康地区金铜成矿条件是非常有利的。找金、铜前景是乐观的。     

Contamination by Persistent Organochlorines in Small Cetaceans from Hong Kong Coastal Waters

Blubber samples of 2 cetacean species, the Indo-Pacific hump-backed dolphin (Sousa chinensis) (n=11) and finless porpoise (Neophocaena phocaenoides) (n=9), collected from Hong Kong coastal waters were analysed for persistent organochlorines. Mean concentration in the blubber of DDTs was ranked first (46 μg/g wet wt.), followed by PCBs (24 μg/g wet wt.), HCHs (0.76 μg/g wet wt.), chlordane compounds (0.38 μg/g wet wt.) and HCB (0.07 μg/g wet wt.). The present cetacean species may potentially be faced with high risk due to the elevated level of DDTs and PCBs. Relatively high concentrations of PCBs and DDTs can be attributed to the continuous environmental input of these compounds in the Far East region including Hong Kong. Highly chlorinated PCBs such as IUPAC Nos. 138, 153, 180 were the prominent congeners, accounting for 39% of the total PCBs. Mean concentrations of 6 non- and mono-ortho coplanar congeners were 2.1 and 2.8 μg/g wet wt. in the hump-backed dolphin and finless porpoise, respectively. Among highly toxic coplanar PCBs, mono-ortho congener IUPAC No. 118 and non-ortho congener IUPAC No. 126 were estimated to have the greatest toxicity contribution. Tris(4-chlorophenyl) methane (TCPMe) and tris(4-chlorophenyl) methanol (TCPMeOH), which have been the most recently identified microcontaminants, were also detected with the highest concentration of 290 and 300 ng/g (wet wt. basis), respectively. The concentrations of TCPMe relative to TCPMeOH in cetaceans from Hong Kong coastal waters were significantly higher than those found in various seals collected from other parts of the world, suggesting the different metabolic system of these two compounds between seals and cetaceans. Correlations between the concentrations of tris-chlorophenyl compounds with other persistent organochlorines such as HCHs, CHLs, DDTs and PCBs were significant, suggesting their accumulation nature similar to these organochlorines.     

江苏沿海滩涂开发利用对气候可能影响的数值研究

为了数值研究江苏沿海滩涂开发利用所产生的区域气候效应,本文将植被参数化（Deardorrf,1978）和土壤种类参数化方案引入钱永南（198）一颜宏等人（1987）提供的套网格模式系统。夏季的数值试验结果表明,夏季开发前后气候差异明显,例如,7月份苏北沿海近地面气温可下降2．2℃,水汽压增加1．6hPa,降水最多可减少0．6mm／d,但这些变化都在正常的气候振动范围之内,对江苏沿海经济持续发展不足以造成不利的影响。最后,本文讨论了夏季江苏沿海滩涂改造成灌溉农田对区域气候影响的可能机制,即通过下垫面性质的改变,削弱了海陆风环流和增强了西太平洋副热带高压下沉气流,使局地降水减少,温度减低,湿度增大。     

海南岛秋季非热带气旋暴雨特性分析及预报

对海南岛秋季非热带气旋暴雨特性的分析发现： 暴雨的发生、维持和消失主要与大陆冷高、南海低值系统、热带云团活动密切相关,暴雨一般与华南沿海的低空偏东风急流相伴。Ｔ１０６ 流场预报为低空急流的生消预报提供了一个客观依据, 文章还对Ｔ１０６ 多个物理量场作了误差分析     

中国地质灾害类型及其分布特征

概述中国地质灾害的分布及特征。并将其划分为十个类型 ,即 (1 )地震 ,(2 )火山 ,(3)滑坡、崩塌与泥石流 ,(4)地面变形 ,(5)海洋动力 ,(6)水质与环境污染 ,(7)矿山与地下工程 ,(8)沙漠化 ,(9)地方病 ,(1 0 )洪水与风沙     

中国气温异常的区域特征研究

用REOF法对中国的年和春、夏、秋、冬季平均气温年际变化进行了分区,并研究了各区气温的变化趋势。结果表明,中国年平均气温可分为8个变化区,春季7区,夏季9区,秋季7区,冬季5区。从年平均气温看,近46a来中国的主要升温区为东北、华北北部和新疆自治区,升温幅度为1．2℃左右。降温区为四川、贵州,幅度为0．3～0．4℃。东南部、西北东部、西藏和云南地区1970年代初以前降温,以后升温,与北半球气温变化一致。各季节升降温区与年平均有一定的差异。升温区范围和升温幅度最大的为冬季。降温主要集中在春季西部、华南地区和夏季长江流域和新疆南部。降温幅度最大的为夏季。秋冬季全国则无降温趋势。     

用F-K方法确定腾冲火山区震源机制*

介绍了计算理论地震图的 F- K方法在不同深度 ,不同震中距 ,不同震源类型的情况 ,表明这种方法在高频区和多层水平层状模型计算效果较好 ,适用于研究中小地震的震源机制。采用 F- K方法得到了发生在腾冲火山区的 3个地震的震源机制 ,结果表明地震 1和地震 2是走滑断裂 ,地震 3是逆断层。 3个地震的主压应力轴基本呈北西向 ,与云南地区主压应力轴方向基本吻合 ,因此 ,推断这 3个地震是构造地震。