黄河流域创新生态系统协同演化机制及障碍因子研究

为了测度黄河流域创新生态系统协同水平、识别其提升的障碍因子,构建基于创新价值链和创新层次两个维度的创新生态系统协同演化机制,采用耦合协调度模型对黄河流域创新生态系统的协同水平进行测度,利用泰尔指数模型进行空间差异分析,通过空间引力模型进行空间联系强度分析,采用障碍度模型对制约创新生态系统协同水平提高的因子进行识别。结果表明:黄河流域创新生态系统协同水平普遍较低,虽然在2011—2020年呈现稳步提升的态势,但是2020年尚有4个省份的耦合协调状态属轻度失调;黄河流域创新生态系统协同水平存在空间不平衡的现象,下游地区最高、中游地区次之、上游地区最低;创新消费能力不足是黄河流域创新生态系统协同水平提升的主要障碍因子。对黄河流域上、中、下游地区分别提出了提升创新生态系统协同水平的具体建议。

Definitions of Natural-Language Spatial Relations: Combining Topology and Directions

Because SQL for querying data from spatial databa se s is ineffective, the query based on natural or visual language becomes an attra ctive research field gradually. However, how to define and represent natural lan guages related to spatial data are still gigantic problems. Because existing mod els of direction relations can’t describe by use of some common concepts. First of all, detailed direction relations are proposed to describe the directions re lated to the interior of spatial objects, such as "east part of a region","ea st boundary of a region", and so on. Secondly, by integrating the detailed dire ctions with exterior direction relations and topological relations, several NLSR s are defined, such as "a road goes across the east part of a lake", "a river goes along the east boundary of a province", etc. Finally, based on the NLSRs abovementioned, a natural spatial query language (NSQL) is formed to retrieve da ta from spatial databases.

长三角一体化地理信息平台设计与实现

为贯彻新发展理念,长三角需要在创新区域协同机制、转变区域发展模式上做出表率,通过构建满足区域协同发展的空间数据体系,实现跨区域、跨部门的空间数据共享交换,以支持规划编制、区域监测、发展评估以及专项政策制定的辅助决策。对长三角一体化地理信息平台的设计思路、关键技术、平台构架进行了阐述,并从交通、科创、消费3个维度分析和展示了长三角41个城市的空间联系度,为区域一体化平台的建设提供借鉴。