新型农村社区建设区位选择——以河南省武陟县为例

新型农村社区是一种介于城镇和农村之间的创新型、现代化空间行政单元,它一般整合多个自然村集中建设,对城乡一体化进程有着重要的推动作用。以河南省武陟县为案例,在新型农村社区规划过程中,利用因子分析等方法,对武陟县342个行政村进行影响因子的筛选、评分和排序,得出区域自然地理条件、人口和社会环境等各项条件对其发展潜力的影响,并由此得出各村的综合评分,确定村庄的发展条件,作为社区中心选择的依据。此方法在新型农村社区规划前期分析及居民点布局中起到基础和关键的作用。     

金融危机下泛长三角FDI时空格局演化及其机制研究

在华FDI的区域差异及其区位选择的演化过程与机制,受企业属性、产业特性及来源国和承接国社会经济环境等多种因素影响.在国际金融危机冲击下,全球虚拟与实体经济波动、国际产业转移新趋势与国家宏观政策新导向等内外部因素不断重构在华FDI时空格局演变过程与机制.基于路径依赖、外部冲击等理论分析框架,本文以泛长三角地区为例,首先从总量、行业与区位选择等方面分析了金融危机前后FDI的时空演变过程;其次通过计量模型对FDI区位选择影响因素演变过程进行实证研究.研究表明,金融危机前后泛长三角FDI区位选择及其影响因素转变遵循路径依赖动态演化模式,主要表现为原有演化路径受到金融危机冲击,伴随市场环境、生产要素成本、创新环境、集聚经济和沉淀成本、制度环境等内外生因素影响,FDI总量、行业与区位选择的演化趋势也呈现出复杂性与多样化.     

A non-dominated sorting genetic algorithm for the location and districting planning of earthquake shelters

The improvement of emergency coping capacity is one of the most efficient measures for mitigating disaster impact. Shelter planning is an important strategy to reduce the number of casualties and injuries and facilitate disaster recovery. This study aims to address earthquake shelter location selection and the districting planning of service areas jointly. A bi-objective model is proposed to minimise the total evacuation distance and the total cost, subject to capacity and contiguity constraints. A non-dominated sorting genetic algorithm is developed to tackle the bi-objective model, which involves a multitude of decision variables. To fit the model, the chromosome structure, initialisation process and genetic operators in the algorithm are specifically designed to maintain the contiguity of the service area. And a hybrid strategy of bidirectional multi-point crossover and bidirectional single-point crossover helps promote the diversity of the solutions and accelerate the convergence. Moreover, the Pareto-optimal strategy and feasibility-based rule are combined to obtain trade-offs between objectives. The model and algorithm are validated in a case study of the earthquake shelter location and districting planning problem in Chaoyang District of Beijing, and the results confirm the effectiveness and efficiency of the method.     

移动目标信息管理平台的设计与实现

移动目标信息管理平台是LBS(Location-Based Service)的重要组成部分，它在城市信息及物流系统中起着非常重要的作用。本文以移动目标信息管理为主线，在充分考虑当前各种移动目标信息管理平台所面临共性问题的基础上，结合实际平台的开发，对其关键技术进行了分析，并对系统平台进行了设计与实现。通过车辆物流管理系统实例的特点与运行效果分析，证明了本文提出的移动信息管理平台框架流程的可行性。     

LBS中基于轨迹的用户行为特征分析

LBS的发展趋势是向用户提供智能化、个性化的位置服务。以用户行为轨迹数据为基础,进行轨迹简化、POI匹配、时空融合、习惯分析等处理,建立起用户行为特征模型,从而实现向不同用户提供个性化位置服务。     

精密单点定位在线GNSS数据处理精度比较分析

利用自动精密定位服务（APPS）、GPS分析定位服务（GAPS）、加拿大空间参考系统（CSRS）以及magicGNSS四个在线精密单点定位（PPP）网络数据处理软件,分别采用静态、静态模拟动态方式处理了若干国际GPS服务（IGS）跟踪站的观测数据,比较分析了四个在线PPP定位服务的数据处理能力及其精度。结果表明：不同的PPP在线定位服务的定位精度及其稳健性有所差异,但基本上都能够满足静态mm-cm级,动态1～2dm的定位精度。     

基于正八面体的四孔六边形球面格网编码及索引

将正八面体上下相邻的两个三角形面片合并成一个四分体,建立二维坐标系,在此基础上采用六边形格网单元的层次编码方案,分析了不同位置格网单元的编码特征,提出了一种“孔4双轴查找算法”,实现了相应的邻接单元及父、子单元查找,并进行了相关实验及对比分析。结果表明,该算法和传统的Vince算法相比较,邻接单元查找速度提高了约900倍,父单元和子单元的查找速度均提高了约120倍。     

Intensive Observation of Reservoirinduced Seismicity and Preliminary Analysis on the Causes of Earthquakes in the Three Gorges Reservoir Area,Yangtze River

In accordance with the requirements of the National Key Technology R&D Program of the 11th "Five-year Plan",a densified seismic network consisting of 26 seismic stations was established at the Three Gorges Reservoir area in the section of Hubei Province in March 2009(21 short-period seismographs,5 broadband digital seismographs).From March to December,2009,a total of 2,995 ML-0.8~2.9 earthquakes were detected during the trial impounding of the Three Gorges Reservoir(water level rose from 145 m to 172.8m).Using the double difference earthquake location algorithm,2,837 earthquakes were precisely re-located.The results show that the pattern of small local earthquake swarms in the Three Gorges Reservoir area took on a linear distribution or mass-like cluster distribution,the mass-like clusters of events were generally within a distance of 5 km from waterfront,and the linear distribution of the earthquakes could be extended to a distance of 16 km away from the waterfront.In the Hubei section of the Three Gorges Reservoir,earthquakes were mainly concentrated in the northern end of the Xiannvshan and Jiuwanxi faults near the Xiangxihe River,and along the banks of the Yangtze River at the west of Xietan township and the Shenlongxi area on the northern bank in the Badong region,with focal depths less than 10km,and 4km in average.Earthquake frequency in the reservoir region had a positive correlation with reservoir water level fluctuations,indicating that the seismicity belongs to reservoir induced earthquakes.Along the Shenlong River in the reservoir area,earthquakes showed three linear distributions in the northern Badong county,and distributed according to Karst distribution.There are underground rivers in the carbonate strata.When the reservoir was impounded,water permeated into the underground rivers,thus inducing earthquakes.Earthquakes in the areas on the cross-river segment of Xiannvshan fault,the Jiuwanxi fault and at the areas west of Xietan,Shazhen and Xizhen,may be related to the softening of discontinuities,such as the Nukou fault,the Xiannvshan fault,or the bedding joints,which would lead to failure of rock masses,thus,inducing earthquakes.However,convincing conclusions about the triggering mechanism still need further study.Additionally,near the areas south of Wenhua and Yanglin of Zigui county and at Rangkou town east of Badong county,mining-induced earthquakes occurred at the mines nearby,and on the shores of the reservoir are some collapse earthquakes.     

Relocating ruptures of two M6 earthquakes in Zhongba, South-central Tibet in 2004 and 2005 with seismological and geodetic methods

To better understand repeatability of strong earthquakes in previously ruptured zones during one seismogenic period, we studied the rupture zones of the doublet of M6 earthquakes in Zhongba region of southcentral Tibet, China, in 11 July 2004 and 7 April 2005, respectively. We focused on the overlapping degree of two strong quakes’ aftershock areas one week after the mainshocks by using the SQH station in China Seismic Network and a 68-stations temporary broadband seismic array, a part of the international ...     

江苏及周缘地区地震精定位与构造意义分析

采用双差定位方法,对江苏地震台网记录到的江苏及邻区地震事件(1990-2009年)重新定位,共获取1020个定位结果,震中平均误差为:南北向0.42 km,东西向0.43 km,垂直向0.53 km.精定位后约94%的地震事件震源深度分布在5-20 km范围内,平均震源深度为12.3 km.震源深度自东向西,从海域向陆...