Spatio-temporal dynamic of quality of life of residents,Northeast China

Quality of life(QOL) is a hotspot issue that has attracted increasing attention from the Chinese Government and scholars, it is also a vital issue that should be addressed during the cause of ′establishing overall well-off society′. Northeast China is one of the most import old industrial bases in China, however, the industrial structure of heavy chemical industry and the development mode of ′production first, living last′ have leaded to series of social problems, which have also become a serious bottleneck to social stability and economic sustainable development. Through applying the methods of BP neural network, exploratory spatial data analysis(ESDA) and spatial regression model, this paper examines the space-time dynamics of QOL of the residents in Northeast China. We first investigate the indexes of QOL of the residents and then use ESDA methods to visualize its space-time relationship. We have found a spatial agglomeration of QOL of the residents in middle-southern Liaoning Province, central Jilin Province and Harbin-Qiqihar-Daqing area of Heilongjiang Province. Two third of the counties are low-low spatial correlation, and the correlative type of about 60% of the prefecture level areas keeps stable, indicating QOL of the residents in Northeast China shows a certain character of path dependence or spatial locked. We have also found that economic strength and development levels of service industry have positive and obvious effect on QOL of the residents, while the effect of such indexes as the social service level and the proportion of the tertiary industries are less.     

基于低碳经济视角的上海创意产业园区发展研究

本文首先以产业调整为纽带,结合上海创意产业园区发展实践,建立了创意产业与低碳经济概念的理论联系性。然后通过对两者特征契合性的进一步分析,以及M50创意园区案例研究,证实了发展创意产业园区是上海遵循低碳经济要求、建设低碳城市的有效途径之一。最后,基于此认识本文从低碳经济视角提出了一些今后上海发展创意产业园区的建议。     

Space-for-time substitution in geomorphology

Journal of Geographical Sciences - Geomorphic evolution often presents a spatial pattern of a “young to old” distribution under certain natural environmental conditions, whereby...     

塔克拉玛干沙漠腹地沙粒胶结体的粒度特征

对塔克拉玛干沙漠腹地沙粒胶结体进行溶蚀分散获取组成沙粒,采用激光粒度仪分析粒度成分,并与区域内沙丘沙、垄间平地沙和风沙流输沙的粒度特征进行对比,分析沙粒胶结体的粒度特征。结果表明：（1）沙粒胶结体中沙粒粒径呈多峰态分布,垄间平地沙呈双峰态分布,而沙丘沙和风沙流输沙呈单峰态分布;（2）沙粒胶结体内沙粒分选性较差,偏度属正偏,平均粒径（3.17 Φ）介于沙丘沙（3.10 Φ）和垄间地沙（3.28 Φ）、风沙流输沙（3.67 Φ）之间;（3）沙粒胶结体中沙物质主要组分为细沙和极细沙,与沙丘沙、垄间平沙地沙一致,而与风沙流输沙（极细沙和粉沙）不一致。与沙丘沙、垄间平地沙以及风沙流输沙相比,沙粒胶结体中粉沙、黏土和中沙相对富集,是现代地表物质的混合物;（4）与沙丘沙、垄间平地沙和风沙流输沙相比,沙粒胶结体内沙粒的蠕移-跃移、跃移-悬移截点粒径均偏细,蠕移组分所占比重很高。从组成颗粒的粒度组成来看,沙粒胶结体的形成受局地沙源和风动力的共同影响,是特殊环境条件下现代地表过程的产物。     

努尔苏丹樟子松人工林土壤粒度组成特征研究

为了揭示努尔苏丹不同林龄樟子松人工林对土壤粒度组成的影响,通过野外采样与室内分析相结合,分析了努尔苏丹周边不同林龄樟子松人工林土壤粒度与分形维数特征,研究了分形维数与土壤特性之间的关系.结果表明:(1)研究区土壤粒度组成以粉粒为主,砂粒次之,黏粒最少,樟子松人工林的种植能够显著提升土壤表层细颗粒物质含量.不同林龄人工林...     

A visualization approach for discovering colocation patterns

Colocation mining is one of the major spatial data mining tasks. When discovering colocation patterns, spatial statistics or data mining approaches are commonly used. Colocation mining results are typically presented in a textual form and do not provide any spatial information; thus, the results lack an intuitive approach to obtain cognition of colocation rules. Here, we propose a visualization approach to discover colocation patterns for two independent point distributions and generate visual results. This approach makes use of the ability of human color perception. For two geographic features, our approach first generates density surfaces of the input features and then visualizes the density surfaces using a red or green light with different intensities. Then, based on the law of additive color mixing, our approach mixes the colors of the two density surfaces to generate a colocation rule map. The visualization approach can also provide local details of colocation and be used for local colocation analysis. Users can detect colocation patterns and their distribution from the colocation rule maps. We use both synthetic data and real data to test the performance of our approach.     

低碳经济政策对区域发展格局演进的影响——基于动态多区域CGE模型的模拟分析

利用中国动态多区域可计算一般均衡(CGE) 模型,模拟了低碳经济时代实施碳税政策对中国区域发展格局演进的影响。模拟结果显示,如果各地区实施同一碳税政策,对区域经济的影响存在着区域差异,能源富集地区尤其是欠发达地区的经济损失较大,对发达地区则产生正面的影响,因而将扩大区域经济差异。如果实施差别碳税,对能源富集地区和欠发达地区的影响有所减轻,有利于缩小区域经济差异。针对不同区域制定差异化的低碳经济发展政策,有利于兼顾公平和效率,使中国走上低碳发展和区域经济协调的双赢之路。     

Evolution of pore fluid of low porosity and permeability reservoir in Qinnan Sag:a case study of 29-2 structure in Qinhuangdao area

The southeast depression of Qinnan Sag is a potential oil-gas exploration region in the Bohai Sea area.With the analysis of large quantity of rock thin sections, scanning electron microscope and the physical property data of reservoir, the authors studied the petrological characteristics and the evolution of pore and fluid of sandstone in the deeper strata in 29-2 structure in Qinhuangdao area.The results show that the evolutionary tendency of Paleogene sandstone reservoir porous fluid in research area is changed from alkaline porous fluid to acidic porous fluid, and back to alkaline porous fluid.There are three stages of reservoir porous evolution in Qinhuangdao area, namely sharp decrease in porosity due to mechanical compaction, increase in porosity because of corrosion and dissolution, and remarkable reduction owing to carbonate cementation.     

基于HASM的中国森林植被碳储量空间分布模拟

当前区域尺度上森林碳储量估算主要依据森林资源清查数据,整个过程不仅消耗大量人力、物力,而且十分耗时,严重影响了森林碳储量估算的时效性。针对这一问题,本文提出了基于HASM的森林植被碳储量模拟方法,该方法以全球植被动态模型LPJ-Guess 输出的植被碳储量为驱动场,以森林清查样地数据为精度控制点,模拟生成中国陆地森林碳储量分布情况。研究以第7 次中国森林资源清查数据作为精度控制点数据源,同时作为本文模拟方法的精度验证。结果表明,中国森林碳储量为9.2405 Pg,考虑到森林资源清查是基于一定的郁闭度进行的,因此HASM模拟的结果与根据森林资源清查结果计算得出的7.8115 Pg 相比更符合实际情况,西南山区和东北林区是中国森林最主要的碳库,其碳储量分别占中国森林植被碳储量的39.82%和20.46%。同时与之前(1975-1995 年) 相比具有较大幅度的增长,表明近几十年来中国坚持大规模植树造林的碳汇效果显著。同时也表明基于HASM的森林植被碳储量空间分布模拟方法是有效的,模拟结果合理且精度较高,表明该方法在全球尺度上森林植被碳储量模拟及其它生态系统中碳储量模拟中具有应用潜力。     

基于高铁流的中国城市网络结构特征演变研究

高铁的网络化发展促进了资源要素的快速流动与重新整合,对城市关系产生了显著的影响,基于高铁流逐渐成为探索城市和区域空间结构的重要视角。论文使用2014—2019年高铁客运班次数据和社会网络分析法,对中国城市网络结构特征演变进行探讨。研究结果表明：① 伴随高铁线网的不断延伸和加密,城市网络整体上由东向西拓展,网络规模扩大、密度提升;② 节点功能和地位的时序变动重塑了网络的空间格局,改变了由少数东部城市主导的网络格局,呈现出多中心、均衡化的发展趋势;③ 从关联形态看,全国尺度上的复杂网络结构取代了区域尺度上的轴带式联系形态,整体上与“八纵八横”网络相对应;④ 城市网络的关联强度逐年提升,形成了4个联系层级,城市间的关系复杂而多样。