一般系统论意义下的信息安全体系模型

提出采用一般系统论的方法研究信息安全的理论体系,将信息安全作为一个系统,其中人、操作和技术各项作为系统主要核心因素;主机、网络、系统边界和支撑性基础设施作为影响系统整体性、关联性,等级结构性、动态平衡性、时序性等系统特征的重要因素。采用数学方法研究这些因素之间的相互关系、相互作用和相互影响;建立数学模型研究系统环境、系统结构和系统行为以及系统运行的规律和特点;探讨实现预警、保护、检测、反应和恢复等安全内容的途径。以信息的保密性、完整性和可用性为目标,控制、管理、改造信息安全系统,达到使它的存在与发展合乎安全需要的目的。     

海岸带环境系统与海岸带信息系统

本文提出海岸带环境系统的概念模型,分析了海岸带环境系统动态变化的驱动因素,论述了自然控制和等级调控理论、全球变化和区域调控理论是海岸带环境系统调控的理论基础。阐述海岸带环境系统调控的信息机理。海岸带综合管理是海岸带环境系统调控的一个主要途径。在地理信息系统和遥感技术支持下进行海岸带信息集成与综合,并以此为基础建立复杂的海岸带环境系统动态时空模型,为实施海岸带综合管理和调控提供科学依据。     

空间信息移动用户服务系统

空间信息移动用户服务系统是空间信息平民化服务的技术基础,是GIS产业商业运行的平台。本文重点介绍空间信息移动用户服务系统的系统特征,系统架构以及商用GIS基础库建设和系统运行的商业模式。     

改进奇异值分解方法在高维动力学系统降维中的应用

基于奇异值分解(SVD)方法和高维动力学系统的瞬态响应特性,提出改进奇异值分解方法;应用牛顿第二定律,建立自由度为16的两端带有滑动轴承支承和发生基础松动故障的转子系统模型;采用改进奇异值分解方法,将原始系统降维为自由度为3的简化系统模型,对比原始系统与简化系统模型动力学特性。结果表明:降维后的简化系统模型保留原始系统的主要分岔特性及均方差幅值特性,验证改进奇异值分解方法对高维动力学系统降维的有效性。该结果为高维非线性动力学系统定性分析提供指导。     

搭建开发模式在国土资源电子政务系统中的应用

根据国土资源电子政务系统业务数据和空间数据复杂性、系统功能的多样性,提出利用插件技术搭建平台,系统搭建的开发模式构建长沙市国土资源电子政务系统。     

交互式GIS系统及其在食品企业监管中的应用

根据现代不同类型GIS系统之间数据交换频繁的情况,提出了交互式GIS系统的基本概念、系统架构、数据交换等特点,并在食品企业监管中进行了应用。通过一个桌面GIS系统和若干嵌入式GIS系统之间的协同工作,展示了交互式GIS系统广泛的应用前景。     

海岸带在地球系统科学研究中的作用

本文从系统的定义出发,简要回顾了地球系统科学产生的背景,地球系统科学研究已经成为地学领域的研究焦点与热点,并带动和加速了地球信息机理、陆地地球系统科学和全球变化的研究。重点分析海岸带在地球系统中所处的特殊位置,并在地球系统科学研究中起着重要作用。最后,介绍海岸带科学前沿—海岸带海陆交互作用(LOCIZ)计划。     

基于WebGIS的银行客户服务系统的实现

构建基于WebGIS的银行客户服务系统是银行客服部门提供地理位置相关服务的较好模式和应用趋势。本文讨论了一种基于WebGIS技术的银行客户服务系统的体系结构和功能设计,在中国银行华北客户服务中心实现了系统实例。系统开发采用.NET开发环境,WebGIS软件平台选用SuperMap IS.NET;采用SuperMapSDX+空间数据库引擎技术,通过SQL Server一体化管理北京市中国银行网点、公交网络和基础地理信息等空间和属性数据。系统具有地图操作、网点信息维护、全面的信息查询和统计分析功能。系统部署在客服中心的服务器上,客服坐席员通过浏览器访问系统。与传统的坐席员通过记忆和查找纸质地图解答客户提问相比,通过该系统能极大提高坐席员对用户的反应时间和服务质量。同时系统能自动将各类客户查询信息保存到数据库中,并与空间位置关联,对这些信息进行可视化的统计分析,为银行网点分布和选址提供辅助决策。     

中国发布“探索地球系统”

<正>2015-09-23中国科学院地球系统模式1.0及地球数值模拟装置原型系统正式对外发布。这款"探索地球系统"可以帮助科学家进行短期气候预测、灰霾治理等方面的研究。新发布的地球系统模式1.0是我国自主研发的第一个地球系统模式,包含完整的气候系统和生态环境系统分量,集成大气、海洋、海冰、陆面水文、大气化学和气溶胶、动力学植被和海洋生物地球化学等子系统模式,通过耦合     

地球信息科学基础理论纲要(中)

地理系统论地理系统理论是地理科学理论和系统科学理论的综合。系统科学是由信息论、系统论和控制论三者所组成,而信息论是系统科学的核心与纽带。     

Preliminary study on plasma membrane fluidity of Psychrophilic Yeast Rhodotorula sp.NJ298 in low temperature

The ability of cell to modulate the fluidity of plasma membrane was crucial to the survival of microorganism at low temperature. Plasma membrane proteins, fatty acids and carotenoids profiles of Antarctic psychrophilc yeast Rhodotorula sp. NJ298 were investigated at -3 ℃, 0 ℃ and 8 ℃. The results showed that plasma membrane protein content was greater at -3 ℃ than that at 8 ℃, and a unique membrane polypeptide composition with an apparent molecular mass of 94.7 kDa was newly synthesized with SDS-PAGE analysis; GC analysis showed that the main changes of fatty acids were the percentage of unsaturated fatty acids (C18∶ 1 and C18∶ 2) and shorter chain saturated fatty acid (C10∶ 0) increased along with the decrease of the culture temperature from 8 ℃ to -3 ℃; HPLC analysis indicated that astaxanthin was the major functional carotenoids of the plasma membrane, percentage of which increased from 54.6±1.5% at 8 ℃ to 81.9±2.1% at -3 ℃. However the fluidity of plasma membrane which was determined by measuring fluorescence anisotropy was similar at -3 ℃, 0 ℃ and 8 ℃. Hence these changes in plasma membrane's characteristics were involved in the cellular cold-adaptation by which NJ298 could maintain normal plasma membrane fluidity at near-freezing temperature.     

Information for authors

正1 Aims and Scope Advances in Polar Science(APS)is an international,peer-reviewed journal jointly sponsored by the Polar Research Institute of China and the Chinese Arctic and Antarctic Administration.APS is a comprehensive academic journal dedicated to presentation of multi-disciplinary achievements in Arctic and Antarctic expeditions and research.Its primary purpose     

JOURNAL OF OCEAN UNIVERSITY OF CHINA

<正>Copyright Submfnion of a roanusatpt inks:that the work described has not been published before(exoept In the form of an abstrW or as part of a published lecture,review,or thesis);that it is not under consideration for publication elsewhere that its publication has been approved by ail     

Information for Authors

<正>The Journal of Ocean University of China(Oceanic and Coastal Sea Research)is a comprehensive academic quarterly sponsored by the Ocean University of China,published one volume per year.This journal is devoted to the publication of the theoretical and applied research results on oceanography and marine fisheries.The fieldcovered include the physical,chemical,biological,geo-     

Hydraulics and Hydrology in Mountain Areas

<正>The 35th IAHR World Congress was held in Chengdu,China from September 8 to September 132013.The title of the conference was:"The Wise Finds Pleasure in Water:Meandering through Water Science and Engineering".During the congress,1239 papers were presented in 139sessions for oral presentations and 7 sessions for poster presentations.After the Congress,a Committee was appointed to select some of the best papers presented at the Congress for publication,after a     

Sea ice thickness measurement in spring season in Bothnian Bay using an electromagnetic induction instrument

As an important component of the cryosphere,sea ice is very sensitive to the climate change.The study of the sea ice physics needs accurate sea ice thickness.This paper presents an electromagnetic-induction(EM) technique which can be used to measure the sea ice thickness distribution efficiently,and the successful application in Bothnian Bay.Based on the electromagnetic field theory and the electrical properties of sea ice and seawater,EM technique can detect the distance between the instrument and the ice/water interface accurately,than the sea ice thickness is obtained.Contrastive analysis of the apparent conductivity data obtained by EM and the value of drill-hole at same positions allows a construction of a transformable formula of the apparent conductivity to sea ice thickness.The verification of the sea ice thickness calculated by this formula indicates that EM technique is able to get reliable sea ice thickness with average relative error of only 12%.The statistic of all ice thickness profiles shows that the level ice distribution in Bothnian Bay was 0.4-0.6 m.     

Thermohaline structure inhomogeneity associated with polynia at the northern margin of Emery Ice-shelf

Based on the hydrographic data in austral summer during the 22nd Antarctic Expedition of China(2005/2006),some features can be found about the northern margin of Emery ice shelf as follows.The heat content in the surface layer(0-50 m) at the eastern end and the western end of the ice-shelf margin is much higher than that at the middle.The upper mixing-layer depth and the seasonal thermocline depth at the middle of the ice-shelf northern margin are much shallower than those at the both ends.However there is much less difference between the middle and the ends in the bottom layer.The remote sensing photos show that the inhomogeneity in the surface-layer water is closely related to the spatial distribution of the floes and polynia in the area.     

Phylogenetic analysis of cultivable bacteria isolated from Arctic sea-ice

Phylogenetic analysis based on 16S rDNA of 8 strains of cultivable bacteria isolated from Arctic sea-ice was studied.The results showed that strain BJ1 belonged to genus Planococcus,which was a genus of low mole percent G C gram-positive bacteria;strain BJ6 belonged to genus Burkholderia of β-proteobacteria and the rest 6 strain all belonged to γ-proteobacteria,of which strain BJ8 was a species of Pseudoalteromonas,strain BJ2-BJ5 and BJ7 were members of genus Psychrobacter.Phylogenetic analysis also indicated that bacteria of genus Psychrobacter of the isolates formed a relatively independent phylogenetic cluster in comparison with other bacteria belonged to genus Psychrobacter.     

Foreword

正Rapid changes of Arctic sea ice cover have been in the focus of the international climate research community in recent years.Quite a few of nations have completed a large number of related surveys and research projects in the Arctic Ocean.Up to now,China has performed six research cruises to the Arctic Ocean resulting in a significant volume of research output.Improved knowledge on the atmospheree-sea ice-ocean interactions in the Arctic is a