DYNAMICS IN THE STRUCTURAL FORM OF PROPERTY TAXES∗

Because the property tax is structurally tied to market values of dwellings through the assessment function, rapidly increasing market values may beget rapid increases in property taxes. Public awareness of this process was instrumental in California's 1978 passage of the Jarvis-Gann Amendment. Millage rates should be indexed to counterbalance changes in market values.     

A computerised decision support system for rural policy formulation

Abstract

A primary goal of the NERC/ESRC Land Use Programme (NELUP) was to design and build a decision support system (DSS) to model rural land use and its change due to environmental and agricultural policy. The effects of policies are measured in terms of economic, ecological and hydrological parameters, with land use and land cover being the uniting factors. The DSS incorporates access to a large database and a suite of complex models. The DSS is user-friendly, produces meaningful graphics, and is almost entirely mouse-driven. This paper describes the NELUP view of policy making and DSS, the NELUP database and the DSS models and interface philosophy and design. The results of workshops, conducted with potential users of the DSS, are discussed and summarised.     

From cave geomorphology to Palaeolithic human behaviour: speleogenesis,palaeoenvironmental changes and archaeological insight in the Atxurra-Armiña cave (northern Iberian Peninsula)

A detailed geomorphological study was performed in the Atxurra-Armiña cave system (northern Iberian Peninsula) to decode landscape evolution, palaeoenvironmental changes and human use of a cave within an Inner Archaeological Context. The results show an average incision rate of the river of <0.083 mm a^–1 for at least the last 419 ka, with interruptions due to sedimentary inputs. Moreover, allostratigraphic units comprising fluviokarstic deposits at the base and flowstone formation at the top have been shown to be climatically controlled, formed either during glacial–interglacial cycles or during interstadial cycles. Finally, when the cave was used by humans in the Late Magdalenian, the lower entrance was closed, and they must therefore have entered the cave through the upper entrance. To reach the sectors selected to decorate the panels, they probably travelled from the upper cave level, as the current crawlway was wider than today, according to our U/Th dating. Once these visitors reached the panels, the floor in the main gallery would have been around 15 cm lower than at present. However, the morphology of the conduit was similar; this has significant implications for understanding and interpreting the human use of the cave during the Palaeolithic.     

基于Kriging 算法的海底地形插值设计与实现

针对目前海底地形构建方面存在的问题与不足,基于普通Kriging的计算公式,以渤海海域采集的离散高程点数据为例,对构建海底地形高程模型的空间插值方法——Kriging方法进行了研究。针对海底地形建模的具体实现,重点对Kriging算法的数据分布检验、数据分组、球形模型拟合、网格化插值以及结果显示等模块进行研究。最后,基于Visual C++6.0平台对海底地形高程的插值过程进行了编程实现和可视化表达,从而成功构建出渤海局部海域的海底地形特征,为海洋科学研究和工程建设提供了参考和依据。     

快速城市化背景下乡村绅士化的时空演变特征

乡村绅士化是指移民从城市迁入乡村地区, 通过对一定的经济资本的利用, 来达到对乡村的自然环境与独特的生活方式及文化氛围的体验与消费的过程。乡村绅士化过程造成了乡村地区人口结构的重构以及物质景观的变迁。本文选取广州小洲村作为研究案例, 对乡村绅士化的时空特征及其演变过程进行了深入分析。研究发现, 小洲村乡村绅士化过程分为艺术先锋绅士化及学生化两个阶段。由于空间需求、付租能力、群体数量等方面的差异, 两类绅士化过程对当地的物质环境、文化、社会、经济等方面产生了不同的影响。但两者的发展紧密相连, 在时间和空间上经历了延续、重叠、更替等阶段。乡村绅士化的过程, 在一定程度上缓解了乡村社区经济发展的困境, 也没有造成对本地居民的置换。但是随着社区住房成本的上涨, 先期迁入的艺术家群体正在被付租能力更强的学生群体逐渐替换。值得注意的是, 本地村民通过积极的寻租行为成为乡村绅士化的重要推动者, 而非被置换者。研究发现, 乡村绅士化现象的中西方差异主要体现在4 个方面:经济和物质层面的影响、与城市化的关系、人口置换的后果、绅士化的推动者。这些差异主要与乡村绅士化发展的社会经济背景、机制和特殊的土地政策等密切相关。这一研究对于探讨转型期中国乡村绅士化现象的特征与机制以及乡村社区发展的模式具有重要的理论与现实意义。     

新丰江中心地震台日常数据处理软件

根据新丰江中心地震台实际业务工作的需要,在Visual C++6.0平台上,使用ActiveX Data Objects(ADO)技术,通过客户/服务器(C/S)模式访问MySQL数据库表,并基于MFC(微软基本类库,Microsoft Foundation Classes)的OLE(对象链接嵌入,Object Linking and Embedding)编程方法操作EXCEL报表文件,开发出一套地震数据处理软件,完成台站日常数据的录入、查询、修改、转换和报表输出等工作,实现地震台站的无纸化、网络化办公,提高工作效率。     

子夜均值数据处理软件自主开发和应用

通过对1995-2007年全国24个台站子夜均值数据的整理,总结出各类错误数据的特征,结合数据处理技术,利用Visual Basic语言编制了数据处理软件,建立一种自动化的错误数据识别方法,为数据整理和处理分析提供高效率的工具。为今后子夜均值数据的正确判断提供方便快捷的途径。     

Individual identification of Eurasian perch Perca fluviatilis by means of their stripe patterns

In this study we show that the number, position and shape of stripes were sufficiently unique to demonstrate that juvenile Eurasian perch Perca fluviatilis can be individually identified based on their stripe patterns. The stripe patterns in perch and also other species may thus be used in experiments as an alternative to conventional marking techniques that frequently cause stress to the fish.     

基于Visual Basic实现徕卡DNA03电子水准仪数据处理

基于Visual Basic平台研发电子水准仪数据处理软件,并利用Visual Basic与Microsoft Word进行交互,一键输出信息完整、简单明了、符合测绘成果归档要求的水准测量成果文档。软件实现了从原始数据到成果文档的自动化处理,包括数据提取、数据计算、超限数据提示、成果文档输出等功能,大大提高了电子水准测量内业资料整理效率和准确性,具有一定的实用性。