【摘 要】
：
According to geographic possibilism,environment does not determine socio-economic development.However,the environment sets certain constraints and limitations for development.How do natural settings influence population dynamics?In this study,we examine t
【机 构】
：
Department of Physical Geography,E(o)tv(o)s Loránd University,Pázmány Péter sétány 1/C,Budapest 1117
论文部分内容阅读
According to geographic possibilism,environment does not determine socio-economic development.However,the environment sets certain constraints and limitations for development.How do natural settings influence population dynamics?In this study,we examine this question using the example of (S)ibenik-Knin County,which includes Krka National Park (NP) with a GIS-based statistical approach.The following parameters represent natural factors:elevation,slope,distance from water,and proportion of karst areas.In addition,distance from Krka NP was also added as an independent semi-natural factor (despite the fact that it is a social construction).The dependent social parameters are population density for selected historical dates,population change,year of maximum population,natural increase,migration,and age index.The analysis units are the 199 settlements found in the county,and the 20 local administrative units (LAU2).The study period can be divided into five phases:from the first census in 1857 to 1921,there was a slow increase in most settlements;then a relatively constant phase up to 1961 (some settlements began shrinking in this period);a slow decrease until 1991;a rapid decrease during the next decade;and relative stabilisation to present day.These processes were also accompanied by significant inner and outer migrations.As for the relationships between natural and demographic factors,we found that although the coastal-inland area dichotomy is dominant in the study area,elevation has the highest correlation with most population parameters.However,distance from water is also significantly correlated with population change and migration in certain periods.In the inland areas,there are statistically significant differences between the demographic processes of fully-karstic and partially-karstic areas,while in the coastal zone,the karst effect is overshadowed by other social processes.The impact of Krka NP on the demographic characteristics of the surrounding settlements was statistically not detectable.Our final conclusion is that correlations between natural and population parameters are low or moderately strong but statistically significant in many cases,thus the basic principles of geographic possibilism are valid for the area.
其他文献
城市交通出行需求具有动态性,快速路出口匝道与下游衔接交叉口具有较强的关联性,当交叉口交通疏解能力有限,出口匝道与衔接交叉口距离未合理设置时,交叉口排队易延伸至出口匝道,影响快速路车流正常运行.利用并行微观交通仿真软件Paramics对不同交通需求、出口匝道与下游衔接交叉口间距情况下的城市快速路出口匝道与衔接交叉口的信号协调控制进行研究,分析出口匝道的信号控制和相位差对路网交通流量和行程时间的影响.仿真结果表明出口匝道与衔接交叉口的信号协调控制能明显提高交通流量,降低行程时间.
Successive cultivation of Chinese fir(Cunninghamia lanceolata) would markedly affect the distribution and accumulation of soil inorganic phosphorus (Pi).However,how different chronosequence phases of Chinese fir plantations exerting influences on the qual
Previous studies on the amplitude of East Asian summer monsoon (EASM) changes mainly focused on northern China (represented by the Loess Plateau).However,a rare investigation centered on the subtropical zone of southern China,where the important route for
Landslide susceptibility assessment plays a vital role in understanding landslide information in advance and taking preventive as well as control measures.The need to initially specify the number of clusters,difficulty in handling noise and quantifying ra
Fines migration along with rainfall infiltration is a possible cause of failures of slopes composed of loose deposits.To investigate the intrinsic mechanisms,a rigid mathematical model which can fully capture the multi-phasic and multi-physical process is
利用坦克驾驶模拟器进行训练是提高操作技能的重要方法.针对以往驾驶模拟训练采用统计分析方法难以从复杂训练数据中发现知识和规律的不足,提出CSAGA-LSSVM算法对坦克驾驶模拟训练数据进行分析.首先选择关键点快速生成Shapelets,以减少候选Shapelets数量;其次,根据距离和时间间隔对Shapelets进行组合,增强特征辨识能力;然后,设计自适应遗传算法,动态调整交叉、变异概率,寻找最小二乘支持向量机最优参数解,提高分类结果的准确性;与其他分类方法进行实验对比,验证了 CSAGA-LSSVM算法的
端口敲门技术是一种在端口关闭的情况下实现主机之间连接通信的方法,通过端口敲门序列对合法用户进行认证通信并阻断敌手攻击,在保密传输、隐蔽通信等领域得到了良好应用.然而,端口敲门技术使用固定IP地址,容易暴露真实通信地址导致隐蔽传输失效.针对该问题,提出一种基于端址敲门技术的隐蔽通信系统,通过对端口与IP地址的组合序列进行敲门来传递机密信息,使得通信端信息与所传输信息无关,进而实现信息的高隐蔽性传输.并详细讨论了端址敲门技术中的扩展序列生成和信息传输,针对端口选择的多样性问题,提出基于象限和正弦函数的两种端口
Impulse waves generated by the collapse of pillar-shaped rock masses in Three Gorges,China,have attracted the attention of both researchers and local authorities owing to their catastrophic consequences.In this work,particle imaging velocimetry (PIV) was
Accurate evaluation of landslide susceptibility is very important to ensure the safe operation of mountain highways.The Sichuan-Tibet Highway,which traverses the east of the Tibetan Plateau,frequently encounters natural hazards.Previous studies generally
Recreational Ecosystem Services (RES) are among the most frequently evaluated ecosystem services.RES are seen as a major opportunity for sustainable development in areas of high ecological value resulting from the presence of emblematic species,habitats o