清末苏南厘金征收的基层实态与区域市场结构

厘金制度是近代重要的商税制度,影响着商品经济和市场发展。晚清苏南地区的厘金征收实态可以复原,进而可以梳理征收名目及各类征收模式。征税模式并不完全以商品划分,而是有多种选择,既便于商人据自身情况选择缴纳,又保证官方尽可能多收款项,以此平衡两者关系。以厘卡为对象进行ArcGIS泰森多边形分割,分析苏南地区的市场空间结构,结果显示,清末苏南厘卡半径范围为5.56—6.67千米,府局半径范围为16.45—21.93千米。基于府级厘局与厘卡所生成的泰森多边形差异,与施坚雅模式条件下的区域市场分析不尽相同,这种差异源于区域市场内空间载体属性的差别,部分反映“厘金局的地方市场问题”的空间特征。     

Spatial Distribution of City Tweets and Their Densities

Social media outlets such as Twitter constitute valuable data sources for understanding human activities in the virtual world from a geographic perspective. This article examines spatial distribution of tweets and densities within cities. The cities refer to natural cities that are automatically aggregated from a country's small street blocks, so called city blocks. We adopted street blocks (rather than census tracts) as the basic geographic units and topological center (rather than geometric center) to assess how tweets and densities vary from the center to the peripheral border. We found that, within a city from the center to the periphery, the tweets first increase and then decrease, while the densities decrease in general. These increases and decreases fluctuate dramatically, and differ significantly from those if census tracts are used as the basic geographic units. We also found that the decrease of densities from the center to the periphery is less significant, and even disappears, if an arbitrarily defined city border is adopted. These findings prove that natural cities and their topological centers are better than their counterparts (conventionally defined cities and city centers) for geographic research. Based on this study, we believe that tweet densities can be a good surrogate of population densities. If this belief is proved to be true, social media data could help solve the dispute surrounding exponential or power function of urban population density.     

大遗址价值评估体系研究

古遗址是重要的一种文化遗产形态,大遗址则是具有中国特色的一种与文化历史价值、行政管理、政府决策密切相关的保护对象。显然大遗址的价值判定和评估是这一特殊对象有效保护的基础。本文通过国内外评估体系的比较分析、国内资料、现状的调研分析,确立评估要素,进而结合价值评估体系构架的方法,对我国大遗址价值评估体系进行了初步研究。     

天津市明长城防御体系研究

通过明长城资源调查,天津市明长城本体的分布、构成、体量均有了翔实、科学的记载,天津市明长城虽然很短,其防御体系却很完整,在某种程度上,可以说是明长城防御体系一个具体而微的代表。本文在调查资料的基础上,归纳剖析,以物见人,以物证事,结合文献,以长城墙体、敌台、烽火台及关城、寨堡等设施为载体,将天津市明长城防御体系划分为侦查预警、前线防卫、信号传递、增援策应、前线指挥、后勤保障六大部分,并揭示了有明一代"边有墙、墙有关、关内有堡、堡内有兵"的防御思想.形成了从侦查预警到前线防卫、从信号传递到增援策应、从前线指挥到后勤保障的一整套以防为主、防守兼备、以静制动、以逸待劳的完整防御体系。     

也论新疆“三七政变”

"三七政变"由樊耀南及拥护他的新进派势力所发起,杨增新的牵制政策导致保守派作为制衡力量卷入其中,两股政治力量对决的结果是金树仁的最终胜出。新疆的政权更迭,为国民政府统合新疆提供了契机,而这场政变实质上是受隐伏于新疆社会深层的现代化革新的欲望所驱动。     

南京大屠杀期间市民财产损失的调查与统计——基于国内现存档案资料的分析

抗战期间留宁西方人士、伪督办南京市政公署、迁往后方的南京市政机关及战后南京市抗战损失调查委员会等各方,从各自角度先后对日军在南京所造成的市民财产损失状况进行调查。因受各种主客观条件制约,这些调查结果远低于实际损失。根据目前搜集的5865户市民财产损失档案资料,这些市民家庭的财产损失额不低于1.67亿元(1937年法币),户均损失为28474元,仅此损失数额即相当于战前南京全部市民家庭约678个工作日(近2年)的收入。     

一九二九年宿迁小刀会暴动与极乐庵庙产纠纷案

1929年2月13日,宿迁县小刀会突然"暴动",砸毁国民党党部和学校,绑走党员和教职员,持续三日之久。这次"暴动"与同年3、4月发生的另两起刀会"暴动"被描绘为旨在反对南京国民政府所推行的社会政治改革。与事件无关的极乐庵之所以成为主角,与宿迁国民党党部"庙产兴学"的政治意图不无关系。小刀会事件引发的极乐庵庙产纠纷案,是地方社会对南京国民政府推行"庙产兴学"、"反迷信运动"的因应。     

A study of limestone from the Longmen Grottoes of Henan province,China by neutron activation analysis

The Longmen Grottoes, also known as the Longmen Caves or Dragon's Gate Grottoes, are located near the city of Luoyang, Henan province, China. The grottoes were carved into the limestone cliffs during the period from 493 AD to 1130 AD. Limestone samples from different areas within the grottoes were analyzed by neutron activation analysis (NAA) to determine the concentrations of major, trace and rare-earth elements (REEs). Three compositional groups were identified corresponding to different areas within Longmen Grottoes. X-ray diffraction (XRD) was performed on a few samples to obtain information about the mineral structure. The results indicate that rocks in the northern area are comprised of dolomite, while rocks in the middle and southern areas are comprised of limestone. The NAA results provide information useful for identifying and relocating fragments from the grottoes that may have lost their identity. The compositional data also provides important clues regarding the geologic history of the limestone formation at Longmen.     

Inelastic Demand Spectra of Bi-Linear Models for Capacity Spectrum Method and Response of Simple Structures under Near-Source Records

A very useful tool for the preliminary design of structures is the elastic demand spectrum that can be used in the capacity spectrum method. A pseudo-acceleration relationship has to be assumed when constructing a demand spectrum. This assumption results in large errors for long period structures with large damping ratios and the conventional demand spectra require a substitute elastic structure. In the present study, the conventional demand spectra are extended to bi-linear models. Pseudo-acceleration is still assumed but results in acceptably small errors, when a constant viscous damping coefficient for a single-degree-of-freedom (SDF) structure is calculated from the tangent stiffness and the damping ratio is set at 5% in both elastic and yield phases. For nonlinear structures, tangent stiffness dependency of damping force could be acceptable because energy absorption is primarily the result of structural nonlinear deformation. To extend the conventional demand spectra to a bi-linear model, effective period calculated from the secant stiffness has to be used. The use of effective period introduces no approximation because the peak displacement of the SDF structure is computed from nonlinear analysis in the time domain. The method presented in this study is also valid if damping coefficient proportional to initial elastic spectra is used. In this case, the pseudo-acceleration is defined as the base shear coefficient that is required to produce the peak displacement of the SDF structure in a static manner. We present demand spectra of bi-linear models for a number of near-source records from large earthquakes, and spectral ratios of two horizontal components. The effects of different types of ground motion on the response reduction factor due to inelastic deformation are investigated.     

Seismic Response of Rolling Isolation Systems with Concave Friction Distribution

This article attempted to improve the isolation performance of a rolling isolation system by assuming that the rolling friction force gradually and linearly increased with the relative displacement between the isolator and the ground. After the rolling isolation system under different ground motions was calculated by a numerical analysis method, it obtained more regular results than that of other uneven friction distributions. Results shows that the considered concavely distributed friction force can not only dissipate the earthquake energy, but also change the structural natural period. These functions improve the seismic isolation efficiency of the structural relative displacement in comparison with the general uniform distribution of rolling friction coefficient.