河南省城乡统筹发展的时空特征与定位推进

运用时序主成分分析法,分析了河南省1995-2009年城乡统筹发展动态演变规律,并结合聚类分析结果对2009年河南省18个省辖(管)市进行区域差异分析。研究表明:河南省城乡统筹发展大致分两个阶段,稳步上升阶段和波动上升阶段;2009年河南省城乡统筹发展的空间差异类型可分为高、较高、较低、低四种区域类型。根据时序特征和空间差异特征的定量评价结果,对河南省城乡统筹进行时空定位,并提出深化城乡制度改革、探索城乡协调机制、实行产业集聚发展、建立统一保障体系、营建现代化都市区、推进城乡一体化试点建设进程等推进策略。     

Archaeology of the Early 19th‐Century American Steamboat Phoenix

In September 1819, the passenger steamboat Phoenix caught fire on Lake Champlain and sank off of Colchester Shoal, Vermont, depositing a store of archaeological data on the design and use of early American steamers. The wreck is believed to be the earliest example of a steamboat that has yet been investigated archaeologically, and has been used as a case study for the early development of steam propulsion in North America.     

Some Principles for the Reconstruction of Ancient Boat Structures

Several archaeological finds of ancient boats in Britain are currently being reconstructed using a variety of methods and standards. This paper discusses some of the general principles that should be observed so that such endeavours will be scholarly valuable. The Dover boat case study (later in this issue) is based on the analysis presented here. © 2006 The Authors