新疆阜康急斜地层煤层气井施工技术

针对新疆阜康白杨河煤层气矿区地层急斜、软硬互层、存在烧变岩层等问题造成的钻孔极易弯曲、坍塌等问题,采用空气潜孔锤钻井技术及无线电磁波随钻测井定向钻进技术,顺利解决了钻孔弯曲、塌孔、成孔难等施工难题,施工效率达到常规钻井速度的3倍以上,对于类似地层的煤层气井施工有借鉴意义。     

容积率地价修正系数实证研究

以66个城市容积率地价修正系数为样本,以容积率比值和地价修正系数的关系为基础,对样本容积率地价修正系数进行归纳分析。部分样本存在标准容积率设定不规范、地价修正系数表现形式不科学、修正系数上限过低等问题。提出了编制容积率地价修正系数应注意的问题,并建议修订《城镇土地估价规程》(GB/T 18508—2014),在其中增加标准容积率设定方法、容积率地价修正系数编制方法等内容,增强《城镇土地估价规程》的指导作用,提高容积率地价修正系数的科学性和实用性。     

STUDY ON SPATIAL AUTOCORRELATION OF URBAN LAND PRICE DISTRIBUTION IN CHANGZHOU CITY OF JIANGSU PROVINCE

1INTRODUCTION The level and periodic changes of land price are interest- ing subjects for the governors, investors, researchers and grass-roots. Currently, the higher land price in China has become the focus among the people, from central go- vernment tocommon citizens,especially in theChang- jiang (Yangtze) River Delta area around Shanghai City. So that studyingthisproblem have both an academic and practicalmeaning. One characteristic ofland is fixed location (the others are high cost…     

Runoff and sediment loss responses to rainfall and land use in two agricultural catchments on the Loess Plateau of China

Soil erosion is a severe problem hindering sustainable agriculture on the Loess Plateau of China. Plot experiments were conducted under the natural rainfall condition during 1995–1997 at Wangdongguo and Aobao catchments in this region to evaluate the effects of various land use, cropping systems, land slopes and rainfall on runoff and sediment losses, as well as the differences in catchment responses. The experiments included various surface conditions ranging from bare soil to vegetated surfaces (maize, wheat residue, Robinia pseudoacacia L., Amorpha fruticosa L., Stipa capillata L., buckwheat and Astragarus adsurgens L.). The measurements were carried out on hill slopes with different gradients (i.e. 0 ° to 36 °). These plots varied from 20 to 60 m in length. Results indicated that runoff and erosion in this region occurred mainly during summer storms. Summer runoff and sediment losses under cropping and other vegetation were significantly less than those from ploughed bare soil (i.e. without crop/plant or crop residue). There were fewer runoff and sediment losses with increasing canopy cover. Land slope had a major effect on runoff and sediment losses and this effect was markedly larger in the tillage plots than that in the natural grass and forest plots, although this effect was very small when the maximum rainfall intensity was larger than 58·8 mm/h or smaller than 2·4 mm/h. Sediment losses per unit area rose with increasing slope length for the same land slope and same land use. The effect of slope length on sediment losses was stronger on a bare soil plot than on a crop/plant plot. The runoff volume and sediment losses were both closely related to rainfall volume and maximum intensity, while runoff coefficient was mainly controlled by maximum rainfall intensity. Hortonian overland flow is the dominant runoff process in the region. The differences in runoff volume, runoff coefficient and sediment losses between the catchments are mainly controlled by the maximum rainfall intensity and infiltration characteristics. The Aobao catchment yielded much larger runoff volume, runoff coefficient and sediment than the Wangdongguo catchment. Copyright © 2001 John Wiley & Sons, Ltd.     

城市地价动态监测系统设计

土地资源对社会主义市场经济的影响显著,而土地的价格是调节土地资源优化配置的重要杠杆,及时准确公开地掌握城市土地价格的动态变化备受关注。本文探讨了动态监测系统建立的方法、地价区段监测点的选择、地价区段的划分,尝试采用克里金插值模型来实现地价区段的划分,并获得了良好的划分结果。系统采用SuperMap开发控件的WebGIS技术、基于B/S结构的分布式网络平台,通过对数据库系统的建设实现了城市地价的计算机管理和信息的定期发布。     

城市景观对住宅价格的影响——以杭州市为例

优美的城市景观是人们日常生活休闲、娱乐的场所, 给人们带来心理上的愉悦和舒适感, 对城市的品质内涵也有重要影响。由于大多数景观效益是隐性的, 其舒适性价值难以用货币价格直接测量, 国内外学者广泛采用特征价格法进行实证研究。本文以杭州市为例, 从建筑、邻里、区位、景观四个维度选择25个解释变量构建特征价格模型, 定量评估了城市内部各类景观对住宅价格的影响。实证结果表明:住宅价格与到西湖和公园的距离呈负相关关系, 而与公园的面积呈正相关关系:其中, 到西湖和最近公园的距离每增加1%,住宅价格将分别下降0.240%和0.036%;公园的面积每增大1%,附近的住宅价格则提高0.012%;广场、山景、钱塘江等景观也对周边一定范围内房价具有显着的提升作用。     

东营凹陷北部陡坡带稠油成藏机理与油气运聚特征

东营凹陷北部陡坡带的王庄—宁海地区发现了大量稠油 ,但原油的成因及其成藏机理仍不甚了解 .在以往原油成因与油源调查基础上 ,利用非烃含氮化合物及包裹体均一化温度对该区进行油气运移方向与相对距离、成藏时间与期次的分析 .结果表明 ,东营凹陷北部带原油具有由南而北的运移分馏效应 ,反映北部陡坡带原油来自南部的利津洼陷 ;王庄—宁海地区原油总体具有由东而西的运移分馏效应 ,其东、西两侧各有一主要油气注气点 .王庄—宁海原油烃类与非烃组成与分布特征揭示该区油气具有混合聚集特征 .包裹体测试反映王庄—宁海地区油藏主要为晚期成藏 ,距今小于 5Ma ;而靠近生油中心地带包裹体具有早期成藏的记录 (± 36Ma) .     

水资源全成本定价问题

随着经济的发展,人们对水资源的需求越来越多,水资源的天然供给与人类需求的矛盾越来越突出。在我国一些地区水资源不足已成为制约经济发展的一个主要瓶颈。但是一方面是水资源的不足,一方面又存在水资源的大量浪费,因此,合理配置水资源的使用已成为当务之急。配置资源的方式有2种,一种是计划手段,一种是经济手段,水资源的合理配置应将2种方法结合使用。文章依据马克思的劳动价值论,对水资源全成本定价方法进行了探讨。     

Unraveling the multi-scalar residential segregation and socio-spatial differentiation in China: A comparative study based on Nanjing and Hangzhou

Residential segregation is a dual process of socio-spatial differentiation in residents and spatio-temporal heterogeneity in dwelling.However,most of the existing studies are es-tablished from the single perspective of urban residents based on demographic data,which is difficult to reveal the dynamics and complex spatial reconstruction within and between cities.With the characteristics of both stability and timeliness,the rapidly changing housing market is one of the processes and results of socio-spatial reconfiguration,and it is undoubtedly a better lens to observe residential segregation.This paper adopts methods such as multi-group segregation index,multi-scalar segregation profiles,and decomposition of segregation index,with Nanjing and Hangzhou as case cities,and establishes multi-scalar segregation profiles and comparative models based on three geographical scales of census tract,block and grid,and different residential types.A quantitative study was conducted on the degree and pattern of multi-scalar residential segregation in Nanjing and Hangzhou from 2009 to 2018.The pa-per found that the spatial segregation index is an improvement of the non-spatial segregation index.There are differences between Nanjing and Hangzhou in the evolution process of residential segregation.Nanjing has a higher degree of spatial differentiation as a whole,among which spatial components have a more significant impact.     

城市住宅价格空间分异的区域一体化因素分析 ——以河南省开封市为例

选取2001年、2006年、2009年、2016年4个时点的城市商品住宅交易数据,基于空间分析与计量模型等方法,对开封市住宅价格时空变化特征及其与区域一体化因素的关系进行分析。结果表明:开封市城区住宅价格空间分布由单中心模式向多中心结构转变,邻近郑州的金明区正成为房价“高峰”;跨界交通和新城规划等一体化因素对开封市住宅价格的影响较为显著,且影响力随着一体化推进而变化。其中,郑开大道对住宅价格的正向促进作用呈先增后降的特点,开通相对较晚的郑开城际轻轨对住宅价格有着明显的正向作用,而开封西郊金明区的快速扩张弱化了其潜在效应。这有效地证实了区域一体化对城市住宅价格有显著影响。