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21.
京津冀协同发展大背景下,北京市制造业转型升级和空间布局调整面临新的挑战。本文基于微观企业数据,采用偏离-份额模型剖析了1996-2010年北京市制造业发展的时空演化特征,基于空间偏离-份额模型,提出京津冀协同发展背景下,未来北京不同功能区制造业疏解方向。研究发现,从功能区层面来讲,北京市制造业由首都功能核心区向城市功能拓展区、城市发展新区以及生态涵养发展区渐次外迁,在此过程中高新技术产业、机械与装备制造业呈集聚发展态势,都市型工业近年来有所回迁,其余制造业逐渐退出北京市。在此基础上,以京津冀协同发展纲要为指导,结合京津冀都市圈各城市产业功能定位和集聚区建设分析了北京市不同功能区制造业未来疏解策略与方向。 相似文献
22.
刘玉青 《中国历史地理论丛》2020,(3):80-89
明清时期的珠江三角洲河湖密布,津渡是其重要交通方式之一.本文统计了珠江三角洲地方志中的津渡记录,利用ArcGIS可视化等方法,考察了期间区域内的津渡变迁情况.明中后期至清末近400年间,珠江三角洲津渡数量总体呈增加之势,其中清后期增速较快;津渡分布中心具有逐步向海岸线方向推进的空间特征,并在清后期形成了以番禺县为中心,... 相似文献
23.
This paper expands the Narrative Policy Framework (NPF) by employing an exploratory case study approach to examine the construction of narratives temporally. A large-N Twitter dataset concerning the Bears Ears and Grand Staircase-Escalante monuments controversy is utilized to examine the question: how does the use of narrative strategies change over time? Through the application of change-point analysis, we determine time points of significant shifts towards use of the devil-angel shift, scope of the conflict, and causal mechanism strategies. Overall, we find that organizations do not vary their use of narrative strategies over the course of a policy conflict but instead demonstrate discrete changes in response to certain policy events. Based on our findings, we conclude with suggestions for refining and expanding NPF hypotheses. Specifically, we recommend a more contextual analysis of shifts in narrative strategy use in response to specific events over time. 相似文献
24.
北京市城乡转型与乡村地域功能的时序特征及其关联性 总被引：3，自引：0，他引：3
本研究通过综合指标评价法和灰色关联法,揭示改革开放以来北京城乡转型和乡村地域功能的时序特征及其关联性,以期为改善北京城乡关系、有效提升乡村地域功能提供参考。研究结果表明:①1978-2012年,北京市城乡转型依次经历了缓慢转型(1978-1995)、快速转型(1996-2006)、转型放缓(2007-2012)三个阶段。②生态、历史、市场和政策等因素显著影响着乡村地域功能的提升。35年间,乡村地域功能总体稳步发展,并与城乡转型表现出不同的阶段性特征。③在国家政策、经济发展、基础设施建设以及乡村地域功能反馈等综合作用下,城乡转型与乡村地域功能发展存在一定的相关性,二者依次经历了低水平耦合、倒\"U\"型耦合和高水平耦合三个阶段。 相似文献
25.
Gwen Dalby Keith Manchester Charlotte A. Roberts 《International Journal of Osteoarchaeology》1993,3(3):207-212
A total of 1164 temporal bones from various cemetery sites in England were examined using a fibre optic endoscope. Eight bones were found to have evidence of otosclerosis in which proliferative new bone fixes the footplate of the stapes into the oval window, causing deafness. A prevalence of 0.9 per cent in this study is comparable with the incidence found in modern white populations and with that found in a study of 2760 Lithuanian temporal bones of various periods. 相似文献
26.
T. Anezaki 《International Journal of Osteoarchaeology》2007,17(3):299-308
This study investigates changes in past human and animal relationships by focusing on pig (Sus scrofa) remains excavated from archaeological sites in southern Kanto, Japan. Pigs and humans have had a close relationship since prehistoric times and the process of change in this relationship, including possible domestication, is one of the major issues in Japanese zooarchaeology. This study attempts to gain a better understanding of the nature of past interaction between humans and pigs by investigating their relative importance compared with other vertebrate remains, kill‐off patterns, and changes in their size and shape at these sites. The materials used for this study date from the Earliest to Final Jomon (ca. 10,000–2500 BP), Yayoi (ca. 2500–1700 BP) and Kofun (ca. 1700–1300 BP) periods. The relative proportions of pigs were calculated to show the overall trend of pig exploitation in each site. Age at death was obtained based on the state of tooth eruption. Bucco‐lingual crown measurements were taken on the third and fourth premolars and on each cusp of the first and second molars of the mandible, and the logarithmic ratio technique was then applied to these data. The age structure of Sus varies between different sites in the Jomon Period, and significant changes were observed in the Yayoi and Kofun Periods. A decrease in the relative proportion of pigs in the faunal assemblages was observed from Jomon to Kofun. Three major differences were observed in the size of pigs. The overall size of pigs significantly increased from Early to Middle Jomon, whilst a decrease in size occurred in the Yayoi Period. Finally, overall size increased significantly during the Kofun Period. Together with the archaeological evidence—such as the ritual burial of pigs accompanying human burial—we suggest that the interaction between pigs and humans became gradually stronger at some sites during the Late Jomon Period, and the relationship intensified in the Yayoi Period. Copyright © 2006 John Wiley & Sons, Ltd. 相似文献
27.
N. Lynnerup M. Schulz A. Madelung M. Graw 《International Journal of Osteoarchaeology》2006,16(2):118-123
We report the results of testing the diameter of the internal opening of the acoustic canal in the petrous part of the temporal bone for sex determination of skeletal remains. The method involves measuring the diameter using a suite of ordinary drills. The method is very simple and has the great advantage of utilising one of the sturdiest bone elements of the human skeleton. The method may be especially useful for the analyses of very fragmented skeletal remains or cremated bones, where the petrous bone may still be readily recognisable. The method was tested using a forensic sample of 113 left petrous bones with known sex. Intra‐ and inter‐observer testing was also performed. We found a statistically significant difference in diameter between males and females (means: males: 3.7 mm; females: 3.4 mm; P < 0.009). However, the low predictive value (70%) for correct sexing using two sectioning points ( < 3.0 mm = female; >3.5 mm = male) was disappointing. No additional accuracy was gained by employing both left and right petrous bones (a bilateral sample of 60 petrous bones was also tested), although left and right side diameter is highly correlated (R = 0.778; P = 0.0001). Copyright © 2005 John Wiley & Sons, Ltd. 相似文献
28.
Frederick K.D. Nahm 《Journal of the history of the neurosciences》2013,22(2):193-208
Abstract Heinrich Klüver and Paul Bucy described a constellation of symptoms in monkeys following large resections of the temporal lobe that they termed the “temporal lobe syndrome”; now commonly referred to as the Klüver‐Bucy syndrome. The aim of this paper is threefold: (1) to review Heinrich Klüver's behavioral studies on monkeys that led up to his temporal lobe experiments with Paul Bucy; (2) to understand why Brown and Schäfer dismissed the behavioral changes in temporal lobe monkeys they had observed fifty years prior to the studies of Klüver and Bucy; and (3) to show that Klüver's phenomenologically motivated conceptual paradigm helped to unify both neuropsychological and neuroanatomical theories regarding the visual and emotive functions of the non‐human primate temporal lobe. 相似文献
29.
This paper examines the possibilities of creating quantified models of past human activities in both time and space. The study area lies in the south‐eastern Czech Republic and western Slovakia. The spatio‐temporal model of behavioural categories was calculated with the help of Monte Carlo simulations and statistical testing. One of the main advantages of our approach is that it admits the probabilistic nature of input data, quantifies them and provides probabilistic results comparable with other proxies. It also presents a less biased way of how archaeological data from regions and periods with low numbers of 14C datings can be incorporated into models of past population dynamics. 相似文献
30.
《Geography Compass》2017,11(4)
Land surface temperature (LST) is temperature of the skin surface of land, which can be derived from satellite information or direct measurements. Satellite data provide consistent, continuous, and spatially distributed information on the Earth's surface conditions. The moderate resolution imaging spectro‐radiometer instruments installed on the Aqua and Terra Earth observation satellites from NASA, have provided MOD11A2 Product, which contains daytime and nighttime LST in 1 km spatial resolution. Short‐term mean (STM) has been calculated using the daytime LST (2002–2011). LST for year 2012, 2013, and 2014 has been analyzed with reference to STM. The study has been carried out for summer season (March to June) that is also called as premonsoon season. Results show that the district of Saurashtra and Ahmadabad experience high LST during summer as compared to districts of South Gujarat. LST analysis is carried out at district and taluka level for entire Gujrat state. Twenty‐five districts in Gujarat state contains 179 talukas. Study aims to assess inter and intra‐annual and seasonal variability in LST time series data and explores the variation in STM LST and trends in the Gujarat state. The results showed that in 2012 was normal in terms of LST for the summer season, but in the year 2013 experienced above normal or higher LST as compare to STM in almost entire Gujarat during summer season. The analysis showed that the year 2014 summer season also experienced very high LST as compare to the STM. In the year 2013, months of March, April, May, and June, LST is higher than STM in 81, 38, 139, and 43 talukas, respectively. 相似文献