In the context of a globalizing knowledge economy, cities have become more technologically proximate due to the increasing exchanges of people, information, and knowledge. However, technological proximity at the city level has gained relatively little attention within the vast literature on proximity. Drawing upon detailed address information on nearly 3.6 million invention patents that were applied in China between 2012 and 2016, this paper investigates the geography of intercity technological proximity among 286 Chinese cities. Technological proximity is measured by comparing cities' technological profiles which are represented by the distribution of different classifications of patenting activity in which cities specialize. The empirical results show that the level of intercity technological proximity among Chinese cities has been generally on the rise. Moreover, there is strong spatial political bias in the geography of intercity technological proximity, with geographical proximity and institutional proximity having played a significantly positive role in facilitating intercity technological proximity. Highlights Measure technological proximity among 286 Chinese cities using patent data. The level of intercity technological proximity has been generally on the rise The geography of intercity technological proximity has a spatial political bias Geographical and institutional proximity facilitates technological proximity

中国的大学与英国的大学在空间落点上存在明显的差异.中国的知名大学往往坐落于特大或超大城市,老校区通常占据主城区的位置;而英国的一些老牌知名大学很多落点在小镇,且小镇校区沿用至今.文章对比分析英国大学和中国大学分布城市的人口数量和面积,呈现英国大学落点的"小镇情结",通过回溯英国大学最初建校和选址的历史,探求英国大学落点钟情小镇的缘由,剖析"镇学融合"给英国大学和小镇的发展带来的优势,为未来中国新大学校区选址提供参考.

随着城市化进程的不断加快,我国大城市发展进入了新的阶段.城市郊区化发展成为大城市空间变迁的客观趋势.郊区化进程重塑了大城市内部的空间格局和经济地理,改变了居民生产、生活方式及活动模式,同时带来了城市新问题.本研究通过对郊区化动力机制的理论分析,结合中国大城市郊区化的具体形态,分析当前郊区化进程的社会后果,探讨中国城市化的郊区性特征,并展望中国大城市郊区化未来发展的可能趋势.

中国传统生活中的"亲不过三代"逐渐走向了当代社会的"亲不过二代".中国的年轻世代,包括"90后",特别是"00后"青年群体,已疏于与亲戚发生情感联系和日常交往,进而形成了日益普遍的青年"断亲"现象.当代中国的家庭结构、居住形态、社会资本、情感需求、生活方式等变迁,改变并催生了新一代青年群体的亲戚关系认知方式.但是"断亲"之后,中国年轻群体的亲戚关系将何去何从,是否会消解传统中国文化中的"亲缘关系"和"社会资本网络"结构?本文拟对此中问题尝试进行分析和解读.

大城市空间更新的"绅士化"是城市社会结构变迁的一种"空间生产"与"经济增长"过程.当前很多研究把"绅士化"理解为城市内城空间更新进程中,因为经济增长需求而"破旧立新",并由中产阶层"侵入"且逐渐"接替"的空间变迁过程.虽然国外"绅士化"遭遇了住房不公平、原住民利益受损、文化流失等批评,但迄今国内学术界对国外"绅士化"转变为"超级绅士化"现象缺乏深入研究."超级绅士化"本质上是城市规划更新、地价增长与空间"奢侈化"的衍化过程.在中国大城市中心城区空间更新,"腾笼换鸟"策略已成为共识的城镇化后半程,更需要深刻理解大城市中心区更新的"超级绅士化"所引发的"空间奢侈化"变迁趋势.

中国的城市化进程进入新发展阶段,各大城市都在上演新一轮的"抢人大战".城市化的主要动力之一是大量外来人口为追寻更美好的生活而不断徙居,其中青年人口向大城市迁移成为主流.但外来青年在大都市生活并不如想象中顺遂.学术界长期关注的外来人口在大城市面临的生活环境逼仄、工作待遇较低、身份认同模糊、城乡二元困境、短期内难以全面融入大城市等社会问题,在大城市外来青年这个群体身上同样存在.通过问卷调查和案例分析,深度挖掘分析新时期外来青年到大城市从"落脚"到"融入"的过程、心态等问题,从而为新一轮的城市"抢人大战"提供一种新的认知视角.

在抗击新冠肺炎重大疫情中,涌现出一大批90后青年逆行者.他们中有医生、护士、警察、志愿者、快递小哥和辅助人员,这个青年群体的勇敢行动,既体现了对自身职业使命和伦理的清晰认知,也体现了国家情感的高度认同.正是这种清晰的身份认知与高度的家国情怀,激励着年轻的逆行者冒着生命危险开展繁重的医疗救治与疫情管控工作.他们身上展示了新一代青年的社会成熟度、群体责任心、职业使命感、担当精神和公益品格,他们早已从曾经被标签化的“垮掉的一代”,成长为“勇敢的逆行者”,已经并终将成为中国未来的“中坚一代”.

伴随城市化发展与社会转型,中国城市居民邻里关系现状与特征发生深刻变化.城市住房格局改变和人口流动性加强等社会条件更新使得传统邻里关系出现断裂趋势,同时邻里关系在发展中也产生新的功能和需求.基于对南京市住宅小区居民的实证分析,认为当前城市居民邻里关系呈现熟识度不高、公共性与私密性结合、互动方式多样化、邻里互动意愿强但频率不高、邻里关系满意度较高等特征,并进一步分析其影响因素,为城市社区建立良好的邻里关系提供对策建议.

我国开启现代化新征程,以社会主义文化的繁荣昌盛涵养文化现代化的内涵、展现文化现代化的新风采,必须树立文化建设的国际化战略,发挥好地方先进文化在提升国家文化软实力中的重要作用.江苏作为经济大省和文化大省,在推进文化建设现代化、国际化行动中,将以锻造高水平开放的文化国际化空间、建构高认同的文化国际化标识品牌,不断推出具有国际影响力的文化精品,以及深化拓展“广域通路”的全球化文化营销,持续提升江苏及长三角地区文化的国际影响力,为建设现代化的文化强国做出新的更大的贡献.

"中央文化区"作为城市的大型公共文化设施的集聚中心,对于城市文化活力的增强,城市人文品质的提升有着重要意义.通过对江苏省13个地市城市公共文化空间集聚度的空间分布调查,认为,城市公共文化设施空间的集聚度和集聚数量,与城市能级正相关;城市公共文化空间的集聚性与城市文化能级正相关;城市公共文化设施的集聚性也与城市规划的理念有着直接关联.

The reactive wetting of AgCuTi filler metal over a TC4 substrate was conducted using real-time in situ hot stage microscopy. In addition to the commonly observed bulk liquid, a rapidly spreading precursor film was observed. Both the precursor film and bulk liquid were studied and characterized. The wetting kinetics of the bulk liquid within the main spreading stage was predominantly controlled by chemical reactions, in which Ag-based solid solutions (Ag(s,s)), Ti-based solid solutions (Ti(s,s)) and intermetallic compounds (Ti2Cu) were formed within the central domain. The high temperature phase transition of α-Ti to β-Ti induced by the diffusion of Ag into the TC4 substrate was also observed at the edge domain. In the mid-to late-stage spreading process, a thin precursor film, with an extremely rapid spreading speed, appeared at the front of the triple line. According to compositional analysis, the precursor film was predominantly composed of Ag and exhibited similar spreading characteristics to pure Ag on TC4. The formation mechanism of the precursor film can be explained by the mechanism of rapid adsorption followed by the film overflow; based on this mechanism, a physical model was proposed.

宜居城市既是一种城市建设与发展的理想形态,也是城市治理的一种体系.现代城市在建设宜居城市的时候,一般注重物理空间环境,但从根本上理解,宜居城市更是一种集物理空间、社会空间、文化空间、心理空间的综合诉求.立足十大维度,系统梳理宜居城市的发展方略,以期为中国宜居城市的建设提供一种更宽阔的视野.

城市公共空间是城市的重要资产.公共图书馆作为典型的城市公共空间,具有独特的公共文化空间共享属性和社会服务功能.被誉为“人民的大学”的纽约公共图书馆以其全球化视野和开放共享的服务理念、模式,在场所布局、阅读推广、文化活动、社区凝聚力等层面,构建出“人类共享空间”和“社会创新空间”的空间特质,增进了纽约作为国际大都市的社会融合度.纽约公共图书馆的共享价值创新模式对当代中国大城市建构更多的城市公共空间具有很好的启示意义.

乡村振兴战略是新时代中国全面实现小康社会的重要一环.乡村振兴包含的产业振兴、人才振兴、文化振兴、生态振兴和组织振兴,最终是要实现“产业兴旺、生态宜居、乡风文明、治理有效、生活富裕”的振兴目标.在全国各地的乡村振兴的生动实践中,青年成为最活跃、最有力、最常见的群体.青年群体的现实参与和努力,切实改变了广大乡村的面貌,并为全国范围内的乡村振兴注入了源头活水.青年群体参与乡村振兴的角色主体的镜像类型多元,并且青年投入乡村振兴战略的心态与价值观,呈现了市场经济的理性选择,同时还糅合了家国政治热情、社会责任感和田园牧歌型的“文化乡愁”意识,最终走出了一条“城乡文化反哺”式的青年参与乡村振兴的现实道路.

The microstructure and tensile properties of a 316L stainless steel and 6061 Al laser welded joint in an overlap configuration were studied, and the effects of Cu coating on the quality of the 316L stainless steel/6061 Al dissimilar joints were investigated. The results indicated that the shear strength of the joints increased, while the formation of intermetallic compounds (IMCs) and microcracks at the bottom or near the interface decreased with the increasing thickness of Cu coating. The addition of the Cu coating effectively decreased the rate at which liquid Al penetrated into the molten pool, and then resulted in an increase in the joint toughness. The fracture locations of the joints changed from inside of the molten pool to the 6061 Al substrate, and the fracture mode changed from cleavage fracture to mixed fracture consisting of quasi-cleavage and ductile fracture modes.

交通区位劣势、资源禀赋和产业基础薄弱等问题导致一部分中小城镇面临产业空心化、人口空巢化和文化空洞化的困境.通过乡镇撤并、特色小镇、产业强镇及宜居小镇的规划和建设,提升中小城镇对周边农村人口集聚能力,为人口就近城镇化提供新动力,是我国中小城镇未来发展的重要方向.

Urban agglomerations are a form of urban space location. As a kind of urban agglomeration driven by development planning and focused on space construction, it is not only necessary to obtain the internal integration and external opportunities of integrity, integration and integrated development through the geographical advantage of "production space", but also necessary to genuinely make the main bodies of cities and towns within the urban agglomeration truly gain access to development space and capital for development through the qualitative change of"space production", thereby forming a multiplier effect of the overall urban agglomeration. On the whole, the Yangtze River City Group should foster an intra-regional growth model from "production space"to "space production".

建设城市中央文化区是后工业社会推动城市文化发展和振兴的重要规划.南京市建邺区抓住城市定位调整的机遇,深度挖掘自身空间、区位和文化优势,率先规划建设城市中央文化区,以推动区域经济、文化、社会及生态实现跨越式发展.

公益型书院在乡村的培植推动了一种新的美丽乡村建设形态.其核心路径是以乡村文化符号与文化旅游的触媒效应,建构了新的乡村发展的文化资本.以南京桦墅村嘤栖书院、安徽黟县碧山书局、浙江桐庐的云夕图书馆为代表的品牌书院,在新时期以城市对乡村的文化反哺形态,触发了美丽乡村建设与发展的动力机制.这种绅士化文化空间与乡土环境的媾和,激活了乡村社会资本、旅游资本和文化资本的生产机制.

发展特色小镇在我国已呈燎原之势,各地争相以创建国家级特色小镇作为政策重点.但这种批量式、规模化的特色小镇建设已然陷入了认知误区,运动式、房地产化和短期成效等方式给特色小镇可持续发展埋下了隐患.建议坚持因地制宜、可持续发展、居民普惠与品牌沉淀的原则,全面系统地培育建设一个个符合新型城镇化、城乡一体化发展的特色小镇.