Wetlands are among the most productive and essential ecosystems on earth, but they are also highly sensitive and vulnerable to climate change and human disturbance. One of the current scientific chall
为了满足人们获取室内空间信息时多层次的认知需求,从室内空间的特点出发,以商城为例,对室内要素的分类分级体系进行梳理,在此基础上探讨兴趣点(point of inte-rest,POI)多尺度表达的符号模型;结合地图比例尺和用户需求设计了一套易于理解又能多层次表征要素信息的室内地图POI符号系统,并通过典型案例对其可行性进行制图实践检验。实践结果表明,所提出的多尺度POI符号化方案具有可行性,设计的
IL-27, one of the members of the IL-12 family, has recently been shown to be an important immunoregulatory cytokine involved in the immune response.Recent s