两个距离特征相结合的3D模型检索技术

基于内容的3D模型检索是多媒体信息检索的热点研究问题之一。针对单个距离特征在描述三维模型形状上存在的不足，提出了两个不同的距离特征相结合的3D模型检索技术。实验表明，检索技术具有较好的检索效果，且明显优于采用单个距离特征的检索技术。     

基于敏感位置哈希索引的音频检索

基于内容音频检索的关键问题包括音频特征提取及特征检索算法.将LSH(Locality Sensitive Hashing)索引算法应用于基于内容的音频检索系统中,与传统的索引方法相比,该算法具有复杂度比较低、支持非常高的维数等特点.实验结果表明,将索引算法应用于基于内容的音频检索系统中,其性能优于传统的索引方法.     

基于联机公共检索目录纵向资源整合方式对比研究

通过讨论基于OPAC纵向资源整合的方式,以“畅想之星”为整合实例,详细分析其整合机制及特点,并根据相关参数横向对比几种整合方式,提出图书馆资源整合的发展方向。     

成果地质资料目录数据库及其检索

在简要介绍成果地质资料目录数据库的收录范围、特点及建库进展的基础上,重点论述了该数据库的检索过程(查询系统启动、字段查询、图形查询)、查询结果的显示以及检索策略,以达抛砖引玉之目的,使其尽快地为地质矿产工作、国民经济建设乃至全社会服务.     

模糊信息检索技术及其在FOXBASE中的应用

模糊信息检索,是数据库管理信息系统和情报检索系统中经常遇到的问题。本文讨论了完全确定信息和模糊信息检索的一般概念和特点,给出了FOXBASE数据库系统中模糊信息检索的一般方法:AT检索法和＄检索法,并详细阐述了FOXBASE中各种模糊条件下,模糊信息检索的具体实现方法。对于中文信息模糊检索,重点论述和解决了目标字段错位问题,并给出了主要程序流程,使FOXBASE的模糊信息检索技术得以补充和完善。     

用VB作50年台风路径资料检索与分析

介绍利用VisualBASIC可视化编程语言作 50年台风路径资料以及实时台风路径资料的检索与分析。包括台风路径资料检索程序的设计、多种路径资料的检索方法、相似路径检索方法和双台风路径检索方法等 ;利用所开发的程序框架 ,分析了若干个例的检索结果 ,如 4 8h内影响厦门市的台风路径高频中心在 19.5°N ,12 6.2°E等 ,对实际台风预报业务具有一定的参考价值     

遥感影像语义检索若干关键技术

随着遥感影像数量急剧增加和相关应用的不断扩展,遥感影像的语义检索日渐受到研究者的重视。本文结合遥感影像的特点重点提出遥感影像语义检索框架,并围绕影像语义检索的各关键技术相应地展开一些分析和讨论。这些技术主要包括特征提取、相似性度量、语义标注、高维索引、相关反馈、检索性能评价等。     

基于开源软件的福建省地震台站信息系统的开发

应用开源软件PHP、Apache、MapServer和MySQL,结合福建省地震局地震台站管理的实际情况,构建了一套基于WebGIS的福建省地震台站信息系统.该系统采用开放式的设计模式,可实时响应网内用户对台站基础信息的查询与检索,并通过WebGIS技术,实现了不同类型地震台分布图的显示及基本的地图操作功能.     

浅析浙江地质档案利用工作

地质档案是一种特殊的不能再生的国家宝贵资源，为使浙江地质档案利用工作蓬勃开展，找们要力争领导部门的重视，切实做好地质档案基础工作，不断丰富馆藏，扩大地质档案信息资源，认真做好地质档案资料的整理、修复及档案检索工具的编制工作，同时开展咨询服务并牢记服务宗旨，树立良好的职业道德，不断探索以求发展。     

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.     

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