论地理气候因素对庆阳古代文明的影响

地理、气候环境是人类赖以生存和创造文明成果的重要条件,对人类和人类社会生活有着深刻的影响。不同的地理、气候环境对于人类文明生成的类型和发展趋势有着重大的作用。历史时期地理气候因素的频繁变化,对于古代庆阳文明曾经产生了极其深刻的影响。既是古代庆阳农业和畜牧并举的环境前提,又培养了古人安土守业的眷乡恋土情怀,导致了在文明发展进程中开放与封闭并存的历史特征,形成了庆阳先民勇敢尚武与俭朴勤劳的民风民俗。     

An application of cartographic area interpolation to German administrative data

In many situations the applied researcher wishes to combine different data sources without knowing the exact link and merging rule. This paper considers different cartographic interpolation methods for interpolating attributes from German employment office districts to German counties and vice versa. In particular, we apply dasymetric weighting as an alternative to simple area weighting, both of which are based on estimated intersection areas. We also present conditions under which the choice of interpolation method does not matter and confirm the theoretical results with a simulation study. Our application to German administrative data suggests robustness of estimation results of interpolated attributes with respect to the choice of interpolation method. We provide weighting matrices for regional data sources of the two largest German data producers.     

贵州地质遗迹资源管理探讨

贵州有着丰富的地质遗迹资源,加强管理将有利于贵州地质遗迹资源产业的发展,以及地质公园或地质遗迹自然保护区的建立及完善,改善生态环境,直接促进贵州旅游业的发展,并间接促进贵州省交通、商业、服务业等相关产业的发展,其带来的经济效益将是十分可观的。贵州地质遗迹资源管理要立足可持续发展战略,从建立科学合理的管理体系、实施地质遗迹资源资产化管理、加强地质遗迹资源管理中的人力资源能力建设。     

城镇区域地理要素与城镇空间格局演化——以关中地区为例

从区域视角出发,应用区域空间结构的基本理论和方法,分析了区域地理要素对城镇空间格局的影响作用,通过解析关中地区城镇空间格局演变与区域地理要素方面的关系,认为区域城镇空间格局是自然基础、交通条件、技术经济、社会政治等诸多自然环境要素和社会环境要素综合作用的结果,在不同的发展阶段,由于区域地理要素的变化,区域的城镇空间格局也会相应的处于不同演化阶段。     

Kakutani不动点定理的泛函分析证法

本文讨论了Ｋａｋｕｔａｎｉ不动点定理的泛函分析证法，给出了它的一个较简洁的证明。     

基于纹理映射的医学图像三维重建

提出了一种基于纹理映射的体绘制算法,提高了图像的重建效率,增强了图像的重建效果。算法实现了对二维医学图像序列的三维重建,在目前通用的个人计算机上可以以近似实时的速度重建出高质量的三维图像。针对算法中存在的问题提出了两种不同的改进方法,取得了较好的效果。结合纹理生成的过程和纹理重采样的过程,对重建后的三维图像实现了交互切割的算法。     

映射对与映射族的公共不动点定理

研究映射对与映射族的公共不动点问题,得到一系列结论。     

Sensitivity Analysis for Critical Control Points Determination and Uncertainty Analysis to Link FSO and Process Criteria: Application to Listeria monocytogenes in Soft Cheese Made from Pasteurized Milk

Microbiological food safety is an important economic and health issue in the context of globalization and presents food business operators with new challenges in providing safe foods. The hazard analysis and critical control point approach involve identifying the main steps in food processing and the physical and chemical parameters that have an impact on the safety of foods. In the risk‐based approach, as defined in the Codex Alimentarius, controlling these parameters in such a way that the final products meet a food safety objective (FSO), fixed by the competent authorities, is a big challenge and of great interest to the food business operators. Process risk models, issued from the quantitative microbiological risk assessment framework, provide useful tools in this respect. We propose a methodology, called multivariate factor mapping (MFM), for establishing a link between process parameters and compliance with a FSO. For a stochastic and dynamic process risk model of in soft cheese made from pasteurized milk with many uncertain inputs, multivariate sensitivity analysis and MFM are combined to (i) identify the critical control points (CCPs) for throughout the food chain and (ii) compute the critical limits of the most influential process parameters, located at the CCPs, with regard to the specific process implemented in the model. Due to certain forms of interaction among parameters, the results show some new possibilities for the management of microbiological hazards when a FSO is specified.     

拓扑型极大极小不等式、截口定理和抽象经济平衡点的存在性定理

利用[1]中得到的参数型KKM定理首先证明了区间空间上的几个向量值极大极小定理。应用这些结果,得到了几个拓扑型截口定理和另外三种等价形式,最后讨论了抽象经济平衡点的存在性问题。     

机器测绘实践性教学工作程序化

本文针对机器测绘实践性教学的特点 ,提出了一套教学工作程序 ,目的在于克服教学中存在的忙乱、无所适从、低效率现象 ,同时 ,在学生自己管理自己的过程中提高综合能力。