摘要：The subway stations of urban community type are not only main nodes in the urban traffic network, but also important places for peopled daily life. Widi the rapid development of urban metro and urban economy, the commercial space near tiie subway station has become the focus of urban planning and urban spatial development, and commercial self-oiganization pkys an important role in the development of commercial operations, commercial structures, and commercial scales, so how to make effective use of the inherent laws of the commercial space evolution, and further guide the rational development of community businesses needs more attention and research. This paper takes Chengdu Wannianchang Subway Station as an example to study the evolution stage, influencing factors, evolution characteristics and laws of the neatby commercial space. Moreover, suggestions were put forward such as coordinating competition and collaboration, optimizing space design and management, co-directional self-organization and heter-oiganizations, in order to provide a new reference for the healthy and ordedy development of the neighboring commefdal space near the subway stations of community type.

摘要：中国城市的建设与发展正逐步进入深层次优化发展阶段,专业的规划人才是城市发展的关键。如何培养把握城市发展规律的专业人才,是开展城市规划教育的高校都应深思的问题。美国高校的规划教育起步较早,发展也更为系统和完善。因此,文章从现代城市规划教育发展历程、政府和行业对规划教育的影响、规划院系的发展、教学的内容与模式等方面,对中美高校城市规划教育进行了比较研究,理清了当下中美高校城市规划教育的差异,总结了美国高校规划教育发展过程中值得借鉴的经验,以及中国规划教育未来可能的改革方向,以期对中国高校城市规划教育的改革与提升有所启示。

摘要：在当前小城镇规划建设如火如荼,资源型城镇却转型困难的背景下,如何实现众多工矿城镇可持续发展是亟待解决的问题。本文基于文态环境保护视角,根据工矿城镇文态环境的丰富内涵及其未被充分重视与保护的现实情况,从认知、实施、保障三个层面提出加强工矿城镇文态环境保护的策略。以新疆哈密市三道岭镇为例,梳理分析现有文态资源,运用所提策略从规划分区厘清保护范围、功能布局明确保护措施、建筑改造完善保护载体三方面给出措施。为三道岭面临发展路径单一及动力缺失问题提供了可行的特色化改造规划路径,也为同类型城镇规划改造和修补提供借鉴与参考。

摘要：针对柔性直流输电系统送出时换流站高频振荡问题,提出了一种有源阻尼与无源阻尼抑制方案及其参数优化设计方法,旨在从换流站角度无源化阻抗特性,实现高频振荡可靠抑制。首先,通过分析换流站高频简化阻抗模型中的负阻尼特性,揭示了抑制方案中有源阻尼应实现换流站负阻尼转移到更高频率的原则。其次,基于阻抗模型求得虚拟串联阻抗有源阻尼控制器参数的选取原则,采用系数拟合法求取合适参数。然后,以降低投入成本为目标、完全消除高频负阻尼为约束,运用优化算法确定无源滤波器参数,通过对比虚拟串联阻抗加入后无源滤波器的参数变化,突出协调抑制方案的经济性。最后,通过电磁暂态仿真,验证了参数优化设计方法下抑制方案的正确性和有效性。