基于投入产出模型的中国旅游业产业关联度研究

本文利用2002年中国投入产出表数据,通过计算产业关联程度,分析了中国旅游业的直接关联产业和完全关联产业,定量分析了旅游业产业链上的消耗分配关系,将与旅游业存在关联的产业划分为紧密关联产业、较紧密关联产业和有关联产业,揭示了旅游业的投入结构和服务去向.分析结果表明中国旅游业产业关联具有广泛的波及影响作用、相对较强的前向带动作用等特点.     

Occurrence of the ammonite Goodhallites goodhalli (J. Sowerby) in the Eromanga Basin,Queensland: an index species for the late Albian (Cretaceous)

Mortoniceratid ammonites of the Eromanga Basin of Queensland, although uncommon, are reviewed and reassessed utilising all known collections. Representatives of this group are restricted to the Allaru Formation and almost all specimens are Goodhallites goodhalli, a well-known species from the English Gault. The Allaru Formation overlies the Toolebuc Formation, widely considered to be an essentially isochronous unit because of its unusual sedimentary and geochemical character. Using G. goodhalli, the middle and upper Allaru Formation can be directly correlated with the early late Albian orbignyi and auritus Subzones of the Mortoniceras inflatum Zone as recognized in the reference ammonite zonation embedded in the standard Cretaceous time scale. Overlapping ranges of G. goodhalli and Labeceras and Myloceras allow these common Austral heteromorph genera to be also confidently assigned a late Albian age in Australia, matching their biostratigraphic occurrence in South Africa.     

旅游上市公司自愿性信息披露与业绩相关性研究

基于代理理论与信号理论,业绩优良的上市公司有动力通过自愿性信息披露来降低代理成本或传递其竞争优势。本文选取在沪深两市上市的20家旅游上市公司作为研究样本,采用实证分析方法对旅游上市公司自愿性信息披露行为进行研究,检验自愿性信息披露与公司业绩的相关性,以期促进旅游上市公司完善其信息披露制度。研究结果表明：我国旅游上市公司自愿性信息披露水平整体较低;景点类公司自愿性信息披露水平显著高于饭店类和综合类旅游上市公司。旅游上市公司自愿性信息披露与净资产收益率、总资产周转率、营业收入增长率呈现正相关关系,与资产负债率和詹森指数呈现负相关关系。     

长江中游城市群协同创新空间关联网络结构时空演变研究

基于城市群城市间创新联系和创新差异水平的改进引力模型,运用社会网络分析方法探究了2006—2016年长江中游城市群协同创新空间关联网络结构及其时空演变趋势。研究发现：研究期内长江中游城市群城市间协同创新水平整体逐渐提升,但强寡弱多的非均衡格局改变并不显著;空间上形成了以武汉、长沙为中心辐射邻近地区的协同创新高值区,环鄱阳湖城市群相对落后;长江中游城市群协同创新空间关联网络整体密度和效率提升较快,而三大子城市群城市间协同创新发展相对滞后;网络多中心在发育,逐渐由最初的双核主导发展为“3+5”多核心格局;随着创新内外环境的变化,网络内部四个凝聚子群不断重构,结构和功能更加复杂化和层次化。     

明代书籍插图与人物肖像画关系研究

明代是中国封建社会城市经济和商品经济得到较大发展的历史时期。市民阶层的形成,促进了以戏曲、小说为代表的通俗文学的发展,戏曲、小说中的插图在继承宋元传统的基础上得到了前所未有的繁荣。明代的人物肖像画家面对人物画的弱势格局和蓬勃兴起的书籍出版业,积极为书籍创作插图,两者之间形成了紧密联系、共同发展的关系。     

中国城市人口集聚分布——基于空间效应的研究

城市人口集聚分布以及城市带的形成是一个空间现象,空间力量对其形成和演化具有重要影响。本文应用空间计量经济学与趋势面分析相结合方法,以617个县级以上城市1998年和2011年的城镇人口和经纬度坐标数据来研究中国城市人口空间集聚分布与趋势。研究发现,中国城市人口分布与其周围相邻城市的人口分布关系密切,并且其6阶空间自相关效应是最强的;同时地理位置对中国城市人口体系的空间分布和纵向形态形成具有显著影响。在空间自相关和空间位置相关的共同作用下,城市人口规模聚集区已在东部沿海地区形成。     

The correlation of surface and subsurface artifacts: A test case from Late and Terminal Classic Popola,Yucatan, Mexico

Abstract

Surface collections are commonly used by archaeologists to sample artifact assemblages, but the correlation of surface and subsurface artifacts is not fully understood. Cultural, taphonomic, and research-design factors that can affect the relationship of surface and subsurface deposits are reviewed and the correlation of surface and subsurface deposits is tested statistically with data from the site of Popola, Yucatan, Mexico, a Late and Terminal Classic period (a.d. 600–1100) village in the northern Maya lowlands. This study suggests that surface artifact density is not correlated with subsurface artifact density. Large-scale surface collections can characterize the overall assemblage of a site, but not any small area in particular. In shallow bioturbated soils there is no significant variation between surface and subsurface assemblages at any depth. Surface artifacts may be used to identify the presence of subsurface artifacts, but should not be used to suggest their absence.     

A new method for identifying sherd refits: A case study from the Neolithic of Northumbria,U.K.

Abstract

Here we present a flexible, quantitative methodology for refitting handmade ceramics. Rather than analyzing the physical joins between sherds, we assess the likelihood that non-adjoining sherds of similar appearance are from the same vessel. The customary disregard of non-adjoining sherds in refitting experiments prompts us to address this issue. Using the Neolithic ceramic assemblage from Thirlings (Northumberland, U.K.) as a case study, we test several scoring systems for assessing the probability of two sherds pertaining to the same vessel. The utility of this approach is supported by the comparison of a set of percentage scores statistically verified using Spearman’s rank correlation coefficient. We conclude with a discussion of the contribution of the new method to post-excavation ceramic analyses, and its applicability to other assemblages.     

Early Darriwilian graptolites from central and western China

Taxonomic restudy of Early Darriwilian graptolites from the Yangtze region, Chiadam and Alxa, has enabled a precise correlation of the Undulograptus austrodentatus Zone (including two subzones) across the three regions, and with the Darriwilian GSSP at Huangnitang in the Jiangshan-Changshan-Yushan (JYC) area. Based on specimens from 17 localities in the Yangtze region, the Exigraptus clavus and Undulograptus austrodentatus zones are recognised as replacements respectively of the Undulograptus sinodentatus (Lower) and U. austrodentatus (Upper) zones of Mu et al. (1979). The U. sinicus Subzone, the upper subzone of the U. austrodentatus Zone, is also recognised from the Sichuan-Guizhou area of the Yangtze region. Two subzones of the U. austrodentatus Zone have also been identified from the Chiadam region with more diverse graptolite fauna. The U. austrodentatus Zone fauna also occurs in the Alxa region. A general pattern of changing graptolite diversity from platform through basinal slope to deep basin is proposed, based on early Darriwilian bio- and lithofacies changes from the Yangtze Platform through the Jiangnan belt to the Zhujiang basin. The graptolite diversity increased with water depth and more off-shore setting. Key graptolite species are illustrated.     

Late Middle Cambrian trilobites from St Valentines Peak and Native Track Tier,northwestern Tasmania

Late Middle Cambrian trilobites are described from two localities in northwestern Tasmania. Twenty-four trilobite taxa are documented. The 15 agnostoid species include Paraclavagnostus longus sp. nov. which is placed in the Utagnostinae, a new subfamily of the Clavagnostidae. The nine polymeroid species include a new member of the Rhyssometopidae, Tasmana truncata gen. et sp. nov. Three other new species of polymeroids are erected: Fuchouia tasmaniensis, Nepea delicata and Nepea hellyeri. Both faunas correlate with the Lejopyge laevigata Zone on the northern Australia biostratigraphic scale, possibly with the L. laevigata II Zone. When compared with Hunan, China, correlation is with the upper part of the Lejopyge laevigata Zone, and particularly with the lower part of the Proagnostus bulbus Zone.