Affective neighbourly relations between migrant and local residents in Shanghai     

Zheng Wang  Fangzhu Zhang  Fulong Wu 《Urban geography》2017,38(8):1182-1202

In urban China there is growing scholarly interest in neighbourhood social interaction, but most studies focus on overt neighbouring activities whilst less is known about the affective dimension of neighbourhood relations, such as mutual trust and care. By surveying 1,420 residents from Shanghai, this study examines the affective relationship between rural migrants and local urban neighbours and explores whether the frequency of neighbouring and contextual characteristics may affect this outcome. Our results show that residents who interact more with out-group neighbours also tend to describe their relationship with them as more caring and amicable. Furthermore, residents in working class neighbourhoods tend to rely on intergroup neighbouring as means of facilitating mutual trust. In contrast, residents of neighbourhoods with commodified housing stock already possess a strong affective relationship with out-group neighbours because of a shared identity as middle-class homeowners and, therefore, do not rely on neighbourly interactions as a facilitator of neighbourly trust.  相似文献   

Study on the mussel (Mytilus viridis) as an ⁹⁰Sr contaminative bioindicator of a sea area     

Cai Fulong  Chen Ying  Huang Lingyi 《海洋学报(英文版)》1991,10(4):635-636

It is well known that mussels have been applied more and more to monitoring marine pollution, and have been reported on the marine radioactive monitoring. The majority concentrates the attention on the study of monitoring active products. However, the report on monitoring fission products is rare. T. R. Rice reported that the phytoplankton could concentrate ~(90)Sr, but its drawback is too large mobility to reflect the radioactive level of the specific sea area. For this purpose, the paper applies the mussel, which life range is more fixed, to discuss the possibility of monitoring ~(90)Sr.  相似文献   

Quantifying drought and water scarcity: a case study in the Luanhe river basin     

Fulong Chen  Jianzhu Li 《Natural Hazards》2016,80(3):1913-1932

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金刚石钻进岩石破碎过程及其与规程参数关系的研究          下载免费PDF全文

汤凤林  Нескоромных В. В.  宁伏龙  段隆臣  Чихоткин В. Ф. 《探矿工程》2021,48(10):43-55

金刚石钻进是我国的一种主要钻进方法,在地质勘探和油气井钻进中得到了广泛应用。为了提高其技术经济指标,研究金刚石钻进时岩石的应力变形状态、岩石破碎过程及其与规程参数的关系很有必要。俄罗斯钻探工作者在金刚石钻进岩石破碎方面做了大量的试验研究工作,研究了钻进速度与规程参数的优化关系,提出了临界规程参数组合的概念,推荐了保证正常钻进、防止钻头非正常磨损等的措施。值得我国同行们参考。  相似文献   

深井钻进井底参数测量系统用传感器的分析研究          下载免费PDF全文

汤凤林  宁伏龙  段隆臣 《探矿工程》2021,48(5):38-46

深井、超深井钻探工程中,钻进工艺和操作技术非常重要,直接影响钻井技术经济指标,目前主要依靠地面仪表显示的读数指标来指导钻进。但是,地面仪表显示的读数与井底钻进工艺参数实际数值有一定差异,而且孔越深,差异越大,据俄罗斯超深井钻井研究结果,这个差异可达20%~30%。为此俄罗斯成功研发出了井底参数测量系统,取得了很好的效果,其中传感器是关键器具。本文将俄罗斯深井钻进测量系统中使用的多种传感器进行了综合整理,包括井底钻井液压力传感器、井底温度传感器、井斜顶角传感器、井斜方位角传感器、井底钻头轴载传感器,介绍了这些井底参数传感器的结构组成及工作原理,并分析了传感器与井底-井口联系通道的配合问题。以期对我国13000 m的特深地质井钻进提供参考。  相似文献   

2000―2010年广州人口空间分布变动与多中心城市空间结构演化测度   总被引：2，自引：0，他引：2  

蒋丽  吴缚龙 《热带地理》2013,33(2):147-155

基于广州市第五次和第六次人口普查中的常住人口数据,运用空间分析法、单中心密度模型和多中心密度模型分析法对广州市人口空间分布和多中心城市空间结构进行研究。结果表明,研究时段内广州人口空间动态变化表现为“内圈层（近郊区）快速增长、外圈层慢速增长、核心圈层（核心区）和外圈低速增长”,核心圈层的人口继续增长并向四周扩散,表明广州人口变动的郊区化现象明显,已呈现多中心特征,由2000年的“1个中心（人民公园）2个次中心（白云区的新景街和海珠区的凤阳街）”演变至2010年的“1个中心（人民公园）4个次中心（白云区的同德街、海珠区的凤阳街、天河区的棠下街和沙河街）”,次中心的人口集聚功能逐渐增强,对城市人口分布影响逐渐增大。  相似文献   

转型期中国城市贫困和剥夺的空间模式   总被引：19，自引：2，他引：17  

袁媛  吴缚龙  许学强 《地理学报》2009,64(6):753-763

利用普查数据、民政数据和问卷调查资料,从城市宏观空间与个体微观层面,系统检测了转型时期中国城市贫困和城市剥夺的空间模式及形成原因.研究发现:城市贫困和剥夺具有在内城区重合、外围区分离的特点.内城居住区的户籍贫困人口在住房、教育、设施等多方面处于被剥夺状况,外围的企业配套区户籍贫困人口则没有很明显的被剥夺状况,外来人口聚居区的低收入和贫困农民工处于被剥夺状况.究其原因,计划经济时代和转型时期的城市住房、建设和更新等空间政策的共同作用,直接导致了户籍贫困人口和农民工生活状况的差异,进而产生了迥异于西方城市特征的中国城市贫困和剥夺的空间模式.  相似文献   

Multi-frequency Electromagnetic Induction Survey for Archaeological Prospection: Approach and Results in Han Hangu Pass and Xishan Yang in China     

Panpan Tang  Fulong Chen  Aihui Jiang  Wei Zhou  Hongchao Wang  Giovanni Leucci  Lara de Giorgi  Maria Sileo  Rupeng Luo  Rosa Lasaponara  Nicola Masini 《Surveys in Geophysics》2018,39(6):1285-1302

This study presents the potential of multi-frequency electromagnetic induction (EMI) in archaeology. EMI is currently less employed for archaeological prospection with respect to other geophysical techniques. It is capable of identifying shallow subsurface relics by simultaneously measuring the apparent electrical conductivity (EC_a) and apparent magnetic susceptibility (MS_a). Moreover, frequency sounding is able to quantify the depths and vertical shapes of buried structures. In this study, EMI surveys with five frequencies were performed at two heritage sites with different geological conditions: Han Hangu Pass characterized by cinnamon soil and Xishan Yang by sandy loams. In the first site, high EC_a values were observed with variations in depth correlated to archaeological remains. Moreover, electromagnetic anomalies related to an ancient road and five kiln caves were identified. In the second site, an ancient tomb, indicating extremely low EC_a and high MS_a, was discovered. Its electromagnetic properties are attributed to the cavity and ferroferric oxides.  相似文献   

Corona Satellite Pictures for Archaeological Studies: A Review and Application to the Lost Forbidden City of the Han–Wei Dynasties     

Rosa Lasaponara  Ruixia Yang  Fulong Chen  Xin Li  Nicola Masini 《Surveys in Geophysics》2018,39(6):1303-1322

This paper provides a state of the art of the use of declassified satellite Corona for archaeological application and deals with the use of historical archives of Corona and aerial photographs for detecting ancient hidden cultural relics that may be completely lost in the modern landscape veiled by current land uses and land covers. Geospatial analysis is adopted to identify, extract and map the subtle archaeological features and cultural landscape of the lost Han–Wei Forbidden City in the Henan Province (China). It was one of the most important cities of ancient China, served as the capital for a long period, from the Eastern Zhou (2600 BP, Zhou Dynasty) to the Eastern Han and Wei Dynasties (1900–1500 BP). Outputs from our investigations clearly provided evidence of numerous buried structures of potential archaeological interest that were compared with historical documentation and excavations carried out in the area. The geospatial analysis, applied both to aerial photograph and to Corona pictures, enabled us to discover a number of unknown sub-palaces and structures, thus providing new insights for this important archaeological area.  相似文献   

TOPS模式哨兵-1雷达干涉图误差校正技术     

徐航  陈富龙  唐攀攀  张达 《测绘通报》2019,(10):114-118

哨兵-1系统因其优质的设备参数及开放性的政策具有很高的学术及应用价值，然而其特殊的TOPS成像模式对利用该数据的干涉处理与分析提出了挑战。本文对影响哨兵-1 TOPS模式数据干涉质量的数据配准、电离层及对流层因素进行了定量化分析，提出了基于ESD，以及GPS、ECMWF等外部数据源校正的TOPS哨兵-1模式干涉图误差校正技术；以一对2016年某区域的哨兵-1 TOPS模式影像为研究数据，对其依次进行了精配准、电离层相位和对流层相位系统校正。研究结果表明，配准精度能够满足数据1/1000像元的精度要求；能去除电离层条带相位和方位向相位跳变；进而实现对流层相位约27%标准差精度的提升。此技术能够显著减小哨兵-1 TOPS模式数据的干涉误差，提高其在差分雷达干涉乃至时序差分雷达干涉等形变监测中的应用价值。  相似文献