土地整治项目网上专家评审系统研究

传统土地整治项目专家评审存在着评审周期较长,评审效率较低,评审结果意见不透明、不真实,且受时间、空间限制的缺点。该文在阐述传统专家评审系统的流程及不足的基础上,提出土地整治项目网上专家评审系统的构想及研究。该系统基于B/S(浏览器/服务器)结构的Web应用程序,能够实现无需安装、实时交互、跨越地域限制,使得专家能够在任何地点使用有互联网的电脑、平板进行项目的论证评审。系统具备用户管理、评审打分、数据处理、项目归档、资金流转、网络安全等多种模块,并且实现专家指派、项目可行性研究报告论证、项目规划设计方案评审、项目竣工验收、专家评审结果统计及发布、专家评审费用发放等功能。总体实现土地整治项目专家评审的整个流程,提高专家评审的工作效率,使得土地整治项目专家评审更加规范化,透明化。     

Linux环境并发服务器设计技术研究

讲述许发服务器设计的主要技术，包括多进程服务器、多线程服务器和I／O复用服务器，同时对以上服务器技术的性能进行了简要分析，给出了在Linux操作系统下使用socket实现并发服务器的方法。     

Web入侵防御系统的设计与实现

针对目前常见的Web服务器安全威胁设计并实现了一套Web入侵防御系统.系统通过制定安全策略来检测所有访问Web服务器的行为,可以有效地阻止常见的攻击从而保护Web服务器的安全.由于系统的策略引擎支持加载和调用Lua语言编写的策略脚本,使策略脚本的编写更加简单、灵活.     

基于工业通讯和云主机的地下水监测系统设计

当前,高速发展的物联网和云计算技术为工业、农业、生活等多方面带来了革命性升级。该文设计的地下水监测系统可利用工业通讯技术自动采集传感器中的数据,形成基于OPC规范的数据集,并被云主机的组态软件引用和记录,实现地下水信息存储至服务器的功能。该系统对数据采集和传输技术进行了优化升级,极大提高单服务器控制的监测点数量,具备实现大规模动态监测的能力,以满足对地下水环境信息数据的需求。     

气象采集系统中嵌入式Web服务器的构建

为了解决远程访问、监测及控制气象采集系统的问题,构建了嵌入式Web服务器.以S3C2440处理器为核心,以Linux为操作系统平台,选用Boa服务器,Sqlite数据库,提出了嵌入式Web服务器通过通用网关接口与Sqlite数据库连接的原理、方法和实现.当客户端发出请求时,服务器调用通用网关接口程序,实现了气象要素实时数据的动态查询.     

网上答疑辅导系统的设计与实现

介绍了网上答疑辅导系统的设计与实现.系统采用B/S模式,后台程序基于J2EE技术使用Java语言编写,使用Tomcat服务器,使用MySQL数据库.系统通过对流行开源框架Spring和Hibernate的灵活运用,结合使用JSP、JSTL、JavaScript、CSS样式表、AJAX等技术,力求用简洁清晰的代码,完成网上答疑辅导系统的功能模块.与传统B/S模式类似答疑系统实现技术相比,系统具清晰的结构层次、安装部署简单、功能使用方便,并且具备可扩展性、可维护性、适应性强的特点.     

气象采集系统中嵌入式Web服务器的构建

为了解决远程访问、监测及控制气象采集系统的问题,构建了嵌入式Web服务器.以S3C2440处理器为核心,以Linux为操作系统平台,选用Boa服务器,Sqlite数据库,提出了嵌入式Web服务器通过通用网关接口与Sqlite数据库连接的原理、方法和实现.当客户端发出请求时,服务器调用通用网关接口程序,实现了气象要素实时数据的动态查询.     

基于计算网格的DEM空间分析系统

计算网格技术可以解决DEM空间分析中大数据量和高密度计算对计算资源的需求。计算网格平台Alche-mi给出了模型系统的架构设计和层次设计,将系统划分为DEM分析服务器、计算网格节点和空间数据库服务器;通过集中式空间数据库服务器和基于数据分解的方法设计了系统的并行算法。实例结果表明,应用网格技术可以显著提高大计算量DEM模型分析的运算效率,具有重要理论和现实意义。     

莱州市土地管理办公自动化系统建设

莱州市国土资源局土地管理办公自动化系统采用工作流技术,基于浏览器/服务器(B/S)三层体系结构设计,实现了土地管理办公自动化和国土信息的对外发布。系统采用可视化流程设计,并预留GIS接口,方便今后系统的扩展和升级。系统建成后,大大提高了莱州市国土资源局各业务部门的业务处理速度和协同工作效率。     

环境监测网络中的ZigBee网关服务器

针对在环境监测网络中使用 PC服务器存在造价高、体积大、不易移动,以及客户端软件安装繁琐等问题,设计并实现了一种基于微处理器STM32F101R8和CGI技术的ZigBee网关服务器。该服务器采用内嵌TCP/IP协议栈的网络接口模块芯片W5100,具有UART/SPI/I\+2C/USB多种硬件接口并在可拆卸U盘中植入系统应用程序;环境监测参数由嵌入式网页发布,用户可通过网页远程控制传感器节点。对系统的实际测试结果表明,该设计具有成本低、可靠性高、操作简单等优点,较PC服务器更能满足环境监测的需要。     

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.     

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 comprchensive academic journal dedicated to presentation of multi-disciplinary achievements in Arctic and Antarctic expeditions and research.Its primary purpose is to publish achievements in fundamental research,applied     

Advances in Polar Science CONTENTS(Volume 25,2014)

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Guide to Authors： Journal of Mountain Science

<正>AIMS AND SCOPE(Editorial Policy)The Journal of Mountain Science(JMS)is devoted to mountains and their surrounding lowlands-ecoregions of particular global importance,with a particular emphasis on the important highlands/mountains in the world,such as the Tibetan Plateau,the Himalayas,the Alps,the Andes,the Rockies and many other mountain ranges of our planet.     

Journal of Mountain Science(JMS)

<正>The Journal of Mountain Science(JMS),founded in2004,is an international English-language journal on mountain sciences.JMS is supervised by the Chinese Academy of Sciences(CAS),sponsored by the Chengdu Institute of Mountain Hazards and Environment,CAS,published by Science Press China,and distributed by Springer exclusively throughout the world(excluding Mainland China).The JMS is published bimonthly,fulltexted in SpringerLink and CNKI,indexed/abstracted by     

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.     

Relationship of Arctic sea ice and Northern Hemispheric 500 hPa Polar vortices

Using the NCEP/NCAR reanalysis monthly 500 hPa height data on a 2.5 latitude-longitude grid and 1°×1° sea ice data,the polar vortex area,intensity index and arctic sea ice area index are calculated respectively,and the meridional distribution,period variation and the abrupts in the long range trend are analyzed to study their relationship.The results show that the meridional distribution of sea ice and polar vortex h-ave distinctive difference,the relative positions of them are different in the eastern and western hemispheres,and exept they have periods of 4 months,quasi half year,quasi year,4-5 years and 10 years commonly,and each of them has its own respective variation as well.The sea ice area is decreasing apparently since 1980's,so is the polar vortex area,but their abrupt changge time are different totally.The area of sea ice and polar vortex has prominent positive correlation,but the relationship of sea ice intensity,polar vortex intensity,polar vortex area is complicated.     

Author Index for Journal of Mountain Science Volume 11,2014,pp 1-1656

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