基于VB与Googleearth插件的广西百色市森林防火地理信息系统的设计与构建

基于百色市市、县、国有林场森林防火工作的需求,从森林防火指挥需要出发,以森林资源多源数据（国家防火网热点监测数据、红外遥感影像、Google地图、地面调查数据和防火资源数据等）为基础,对森林防火地理信息系统的技术构架进行了设计,对系统设计中的若干关键技术进行分析,并提出了解决方案。     

地质公园博物馆地学科普的现状及启示

在我国地质公园建设体系取得显著成效之际,联合国教科文组织就我国3家世界地质公园向公众传递科普地球知识的不足提出警告。地质博物馆是地质公园科普教育的重要场所之一,也是地质公园能否掲碑开园的必备条件。地质博物馆浓厚的地学背景特色,决定了地质公园博物馆科学普及任务的紧迫性和特殊性。分析当前我国地质公园博物馆开展科学普及存在的工作人员地学素养不高、解说牌示不够深入浅出、宣传中存在夸大成分和配套设施不全等问题,总结了我国地质公园博物馆具备的有利因素,提出开展博物馆科普教育的有效决策,旨在提升地学知识的普及效果,为地质公园博物馆的发展提供参考。     

一种宗地四至自动赋值的方法探究

农村土地经营权确权项目关乎民生,项目中需要确权的农村土地不仅数据量大,而且形状各异。其中,宗地四至的信息录入,人工识别效率低且容易出错,若利用现有的地理信息软件工具进行二次开发,实现宗地四至自动赋值,将有效提高效率、降低出错率。笔者探讨了基于ArcGIS Engine的二次开发,用最长界址线法来自动获取宗地四至信息,该方法已经运用到湖南省常德市桃源县农村承包经营权确权登记项目中,达到了一定的效果。     

基于Google Earth的GIS专题制图技术研究与应用--以陕西省土壤分类信息系统开发为例

以陕西省土壤分类信息系统中的土类数据制图为例,分析了基于Google Earth（GE）的专题地图的制图原理与技术,提出了一套基于GE的一般地理专题图的制图技术流程,并讨论了其关键技术。指出了GE制图工具目前存在的两个缺陷,提出了相应的解决方法,并介绍了陕西省土壤分类信息系统中GE制图结果和应用方案。     

terraGIS – a web GIS for delivery of digital soil maps in cotton‐growing areas of Australia

Effective management of soil requires the spatial distribution of its various physical, chemical and hydrological properties. This is because properties, for example clay content, determine the ability of soil to hold cations and retain water. However, data acquisition is labour intensive and time‐consuming. To add value to the limited soil data, remote sensing (e.g. airborne gamma‐ray spectrometry) and proximal sensing, such as electromagnetic (EM) induction, are being used as ancillary data. Here, we provide examples of developing Digital Soil Maps (DSM) of soil physical, chemical and hydrological properties, for seven cotton‐growing areas of southeastern Australia, by coupling soil data with remote and proximal sensed ancillary data. A greater challenge is how to get these DSM to a stakeholder in a way that is useful for practical soil use and management. This study describes how we facilitate access to the DSMs, using a simple‐to‐use web GIS platform, called terraGIS. The platform is underpinned by Google Maps API, which is an open‐source development environment for building spatially enabled Internet applications. In conclusion, we consider that terraGIS and the supporting information, available on the sister web page ( http://www.terragis.bees.unsw.edu.au/ ), allow easy access to explanation of DSM of soil properties, which are relevant to cotton growers, farm managers, consultants, extension staff, researchers, state and federal government agency personnel and policy analysts. Future work should be aimed at developing error budget maps to identify where additional soil and/or ancillary data is required to improve the accuracy of the DSMs.     

柴油机燃用甲醇燃料的燃烧循环变动的研究

在燃用甲醇燃料的１１３０单缸柴油机上,通过缸内燃烧分析,对影响甲醇发动机循环变动的各种因素,（转速,负荷,点火提前角,喷油提前角,喷油嘴类型,压缩比,点火方式等）进行了详细的研究,试验结果表明,甲醇发动机的燃烧环变动主要取决于火延迟期的长短和缸内混合气怪状浓度分面是否合理,缩短着火延迟期,或在火花塞跳火区域及燃烧室内获得理想的混合气层状深度分布均可降低甲醇发动机燃烧循环变动,使发动机性能得以改善。     

断斑石鲈土池人工育苗研究

本文报道2001－2005年断斑石鲈人工育苗的初步研究结果。在水温23－30.5℃、海水盐度27－32,pH值7.8－8.9的条件下,初孵仔鱼经27日龄－39日龄变态为幼鱼,全长达24－46mm;2001年、2002年及2005年先后培育出幼鱼27006尾、62000尾及240008尾,育苗成活率分别为6%、13.8%和26.9%。文中还介绍了饵料系列、鱼苗生长与发育及形态观察研究结果。     

Decoding Australia's China threat narrative during 2016–2021

Australia–China relations began to sour in 2016, and the China threat narrative began to dominate since then. Unlike previous studies which either use a qualitative approach or cross-sectional dataset for empirical analysis, this study creatively creates high-frequency weekly and monthly time series datasets using the Google Trends search results during January 2016–February 2021. Based on a series of time series modellings, this study examines the roles of various actors, including China's own policies, the Australian Strategic Policy Institute and Clive Hamilton, various factors, including Chinese purchase of Australian housing, Chinese investment in Australia, Chinese students in Australia and China's rise and various media outlets, including the Australian Broadcasting Corporation, Australian Financial Review, Sydney Morning Herald, Daily Telegraph and Herald Sun, in contributing to Australia's China threat narrative. This study makes significant contributions to academia in methods by bringing a new quantitative approach to international relations studies and to policy-makers as well by quantifying the roles of various actors, factors and media outlets in Australia's China policy debate.     

黑龙江省第二积温带播种期地温变化及玉米适宜播期分析

以黑龙江省第二积温带的巴彦、佳木斯、林甸和宁安4个代表市县2004年至2013年间4~5月份日平均地温为基础数据,结合地温的变化规律和玉米种子适宜萌发温度,确定该积温带的玉米播种日期。结果表明,日平均地温均随着日期增加在波动中增长,4月1~9日,地温增长比较稳定,曲线波动幅度相对较小;4月10~23日,曲线波动幅度最大。10年间地温稳定通过6℃、7℃、8℃、9℃和10℃的平均日期分别为4月6日、4月13日、4月18日、4月19~27日,年际间差异明显。此积温带的玉米最早播种期为4月18日,适宜播期为4月23日至5月5日。     

从三元催化器故障分析发动机的保养注意事项

三元催化器,是安装在汽车排气系统中的机外净化装置,一旦损坏,将会给车主带来比较高的维修费用通过对几款车三元催化器故障分析,针对故障现象、故障机理,提出了避免和解决三元催化器故障的发动机保养注意事项。