地震分析预报网络信息管理与服务系统

概述了地震分析预报网络信息管理与服务系统 (APNET)的系统构成、系统设置及其功能特点。该网络最大的特点是大量的工作都在后台自动运行完成 ,并具有完善的信息认证系统 ,实现了数据的自动备份和允许特定用户群通过WWW访问和浏览等。     

计算机网络风险防范数据仓库的研究与设计

随着全球信息化进程的推进,网络风险已经成为阻碍信息化进程的一个重要因素,网络安全问题成为公众关注的焦点.计算机网络安全事件包括病毒、木马、蠕虫、网络监听、黑客攻击、恶意软件、网页仿冒、僵尸网络等,为帮助网民更加有效地防范网络安全事件,针对网络风险防范数据管理的特点,开展了网络风险防范数据库和数据仓库的研究与设计.该研究通过收集、整理和分析一些权威网站关于各种网络安全事件的统计信息以及历年的网络安全调查报告,以SQL Server 2000作为数据库管理系统,建立了一个关于具体网络安全事件的数据库和数据仓库,其中数据仓库中存储了病毒、木马、僵尸网络、网络钓鱼等具体网络安全事件在不同月份或年份的统计信息.随着数据库中数据的不断完善和充分,可以进一步建立挖掘模型,分析这些历史数据,从而为网络安全风险防范提供基础支持.     

中国水资源利用效率区域差异及影响因素研究

科学客观评价我国水资源利用效率的区域差异并探讨影响区域效率的因素是备受关注的问题.本文在全要素生产框架下利用基于投入导向的数据包络分析模型,以水资源、资本和劳动力为投入,以GDP为产出,采用省级数据计算我国1998-2008年水资源利用效率.结果显示,在研究时段内我国水资源利用效率总体上呈现出先下降后上升的趋势,并且从2008年开始水资源利用效率明显下降.在空间上,我国东、中、西部水资源利用效率处于三个明显不同级别,东部省份水资源利用效率最高,平均水平为0.8左右,其次是中部,平均水平为0.6左右,西部水资源利用效率最低,平均水平为0.4左右.进一步的回归分析发现,产业结构、进出口需求以及地区水资源禀赋对水资源利用效率均有显著影响.     

Multivariate Analysis of the Hong Kong Victoria Harbour Water Quality Data

Two multivariate techniques (principal components analysis and cluster analysis) are used to analyse Hong Kong Victoria Harbour water quality data. Results show that the sampling stations can be divided into four main groups, which is consistent with the tripartite structure obtained from an environmental approach. Moreover, it is found that the groups produced can be interpreted based on two main features of the data: nutrient level and the algae-faecal pollution.     

Temporal trends in opportunistic citizen science reports across multiple taxa

Opportunistic reporting of species observations to online platforms provide one of the most extensive sources of information about the distribution and status of organisms in the wild. The lack of a clear sampling design, and changes in reporting over time, leads to challenges when analysing these data for temporal change in organisms. To better understand temporal changes in reporting, we use records submitted to an online platform in Sweden (Artportalen), currently containing 80 million records. Focussing on five taxonomic groups, fungi, plants, beetles, butterflies and birds, we decompose change in reporting into long-term and seasonal trends, and effects of weekdays, holidays and weather variables. The large surge in number of records since the launch of the, initially taxa-specific, portals is accompanied by non-trivial long-term and seasonal changes that differ between the taxonomic groups and are likely due to changes in, and differences between, the user communities and observer behaviour. Supplementary InformationThe online version contains supplementary material available at 10.1007/s13280-021-01550-w.     

The ethics of Google Earth: crossing thresholds from spatial data to landscape visualisation

‘Virtual globe’ software systems such as Google Earth are growing rapidly in popularity as a way to visualise and share 3D environmental data. Scientists and environmental professionals, many of whom are new to 3D modeling and visual communications, are beginning routinely to use such techniques in their work. While the appeal of these techniques is evident, with unprecedented opportunities for public access to data and collaborative engagement over the web, are there nonetheless risks in their widespread usage when applied in areas of the public interest such as planning and policy-making?     

冲击数据采集分析系统在包装跌落试验中的应用研究

产品包装对产品流通的安全保障有至关重要的作用,为了检测产品包装的抗跌落效果,需要对产品进行包装跌落测试。本文从如何利用数据冲击采集分析系统在产品包装跌落试验中得到的测试数据,合理的有针对性的改进产品包装设计,以达到节约包装设计的时间和成本,提高产品流通安全性的目的。     

浅论环境监测数据的综合分析方法

准确、可靠、可比的环境监测数据是环境科学研究工作的基础,是环境管理的依据。在第一时间判断出监测分析数据是否合理的基础上,再对监测分析的数据作进一步的分析评价,是整个数据综合分析的基础,为进一步综合分析数据提供了依据。本文通过分析几种常用的监测数据的分析方法,说明对监测数据进行综合分析是至关重要的。     

Landscape-climatic changes on the eastern macroslope of the Northern Urals over the past 50000 years

Landscape-climatic changes are described that took place in the second half of the Late Neopleistocene and Holocene on the eastern macroslope of the Northern Urals. On the basis of geochronological and palynological data, the composition of paleocommunities in different time sections over the past 50000 years has been reconstructed in detail. Paleoclimatic parameters calculated by the zonal-formation method are presented.     

图像挖掘技术在林火影像中的应用

提出了林火遥感图像挖掘的概念,描述了图像挖掘技术在林火遥感图像上的具体应用及实现,针对林火部门每天产生并存储的有价值的林火遥感图像,结合林火上所特有的领域知识,提出了一种通过对林火遥感图像进行图像挖掘,可以将林火遥感图像分成有火或无火两类图像的方法。该方法的实现对帮助林火工作人员及早发现火情,做出火灾预测并采取相应措施具有重大的意义。