清代纺织面料——“羽毛纱”的织物结构研究

本文运用现代纺织科学的检测手段,分析了故宫博物院收藏的两件“羽毛纱”样品的组织结构和各项物理指标（织物单位面积质量、织物密度、纱线线密度、纱线捻度和捻度系数）及其织造方法,找到了同样织法的两块织物,存在不同面料风格的真正原因。古人通过巧妙的织造方法,充分发挥纺织原料各自的优点,织造出满足不同穿着目的的面料。     

Electric and magnetic tomographic approach for the geophysical investigation of an unexplored area in the archaeological site of Pompeii (Southern Italy)

The joint application of electric and magnetic techniques for near-surface exploration represents a very useful tool for archaeological investigation and can provide a quantitative contribution to describe the spatial distribution of buried objects. In this work we show a new advanced tomographic approach, based on the parallel inversion of magnetic and electric observed data, aimed at the reconstruction of the subsoil of a still unexplored area of the archaeological site of Pompeii (Southern Italy). The survey was performed in collaboration with Pompeii's Archaeological Commission. The comparison between the results obtained from the tomographic inversions of both electrical and magnetic data was carried out in terms of the data inversions, which allowed us to obtain information about the location of the buried geophysical sources in the investigated subsoil. The results obtained seem to be in a good agreement, both for the position of the geophysical sources and for their dimensions.     

城镇化对农业农村的多维度影响——基于省际面板数据实证研究

基于面板数据，从综合系统-子系统-要素等三方面定量测度省域人口、土地与产业城镇化对农业农村发展的影响程度，深入剖析城镇化不同要素对农业与农村系统发展的作用机理。研究结果表明：①人口城镇化与产业城镇化对农业农村的影响更加明显，对农村生活系统影响的弹性系数大于1的地区比重分别为58.06%和64.52%；土地与产业城镇化对农业生产系统产生负向影响较为明显，弹性系数小于0的地区比重分别为29.03%和38.71%；②城镇化率、产业结构和建成区比重对人均耕地面积、乡村劳动力比重和人均粮食产量呈显著负相关，与农民人均纯收入、人均农业产值和单位面积机械动力呈显著正相关；③通过深入分析近30年省域城镇化对各地区农业农村发展的作用机理，对于新时期新型城镇化、农业农村转型发展等战略的贯彻落实具有重大的现实意义。     

Computer programmes for the correction of matrix effects in the XRF analysis of glass,ceramics and related silicate systems

The quantitative analysis of glass, ceramics and related silicate systems by means of energy dispersive X-ray fluorescence spectrometry is considered and problems arising from the selective absorption of X-rays in multi-element specimens are discussed. A computer programme written in FORTRAN and based upon a “semi-fundamental parameters” approach to the correction of matrix effects in glass and chemically similar materials is fully described. Model data are provided to enable the programme to be run and tested. An “empirical coefficients” computer programme for the quantitative analysis of silicate systems is outlined and the limitations of this type of programme are pointed out. The importance of adequate sample preparation prior to X-ray spectrometric analysis is stressed.     

Capillary Active Interior Insulation Systems for Wall Retrofitting: A More Nuanced Story

To thermally upgrade exterior masonry walls, interior insulation is often the only possible retrofitting technique, especially when dealing with historic buildings. Unfortunately, it is also the riskiest post-insulation technique, as frost damage, interstitial condensation, and other damage patterns might be induced. To diminish those risks, nowadays so-called capillary active interior insulation systems are often promoted. These systems aim a minimal reduction of the inward drying potential, while interstitial condensation is buffered.

Currently, several capillary active systems are on sale. These different types have, however, widely varying properties. In this article, a closer look at the hygrothermal properties and the working principle of a number of “capillary active” interior insulation systems is made. The spread in capillary absorption coefficients and the vapor diffusion resistances of the different systems is discussed and their influence is illustrated. Based on all this, a more nuanced view on capillary active insulation systems is pursued.

Abbreviations: AC: aerated concrete; CaSi: calcium silicate; GM: glue mortar; GB: gypsum board; HAMFEM: Heat Air and Moisture Finite Element Method; MW: mineral wool; PE: polyethylene; PIR: polyisocyanurate; PUR: polyurethane; VIP: vacuum insulation panel; WFB: wood fiber board; XPS: extruded polystyrene; sd_dry: dry vapor diffusion resistance factor; µ_dry: dry vapor diffusion resistance     

正规商业与流动商贩的空间分布关系及其影响因素——以北京市朝阳区为例

流动商贩是城市商业的重要组成部分,其空间分布格局与正规商业不相同。本文以正规商业和流动商贩的引力可达性指数,比较两者在同一区位的可达性差异,依此将两者的空间分布关系划分为五种类型,这些类型在空间上呈同心圆、扇形与多核心相结合的分布模式。通过无序多分类logistic回归,发现以人口密度和人口结构为代表的社会力、以国际资本为代表的市场力和具有不同监管强度的政府力均对正规商业与流动商贩的空间分布关系有显著影响。     

河南省城市化与产业结构演变互动研究

文章在分析河南省城市化发展阶段性特征的基础上,对城市化和产业结构之间的变动关系进行了对比分析、相关分析和回归分析,并用Arcgis9.3以"产业结构演变城市化响应系数"为指标绘制地图,反映了河南省城市化与产业结构之间作用强弱的空间差异,分析表明,河南省城市化与产业结构存在严重偏差,原因在于城市化与产业结构的非协调发展和产业结构与就业结构的不合理发展;河南省的产业结构演变城市化响应呈现"西高东低"、"北高南低"的地理分布特征。最后针对问题提出了对策。     

环渤海地区制造业地理集聚研究

运用区位商指数和基尼系数对环渤海地区两位数制造业20个行业1993-2007年的集聚水平进行测度。结果表明:10余年来环渤海地区20个主要制造业行业的地理集中程度在不断提高,绝大部分行业呈集聚加强趋势;制造业结构具有一定的相似性,各省(市)地方专业化产业趋同,比较优势和集聚经济没有起到应有的作用;环渤海地区工业化进程呈梯度分布,北京、天津已处于工业化的后期阶段,资本和技术密集型产业向内转移,河北、山东、辽宁仍处于工业化的中期阶段,劳动密集型行业具有较强的比较优势。     

Inclusive growth from an urban perspective: a challenge for the metropolis of the twenty-first century

This paper addresses the study of inclusive growth from an urban perspective. It proposes to focus the relationship between urban economic growth and income distribution in cities in which manufacturing production and external demand play a central role. Opposed to the literature that considers economic growth leads to an increase in inequality in income distribution, we present some operative economic tools from Marshallian Industrial Districts theory and from urban economic theory with which to develop an economic strategy for inclusive urban growth, making possible to achieve simultaneously economic growth and improvements in income distribution. An interesting example of a metropolis with a dynamic of economic and employment growth compatible with a reduction in income inequality is provided by Barcelona. This metropolis disposes a Survey of living conditions and habits of the population since 1986 that allows an analysis in terms of inclusive urban growth.     

需求弹性对产业活动的指示功能研究

需求弹性对产业活动有很强的指示功能。围绕需求弹性不同的商品的需求(量)对经济变量的依存关系,研究如何运用需求弹性指导产业活动行为有重要意义。本文概述了需求弹性的数学基础,结合需求弹性释义,从价格弹性、需求收入弹性和交叉(价格)弹性等方面讨论了需求弹性对产业活动的指示功能。