甘肃庆阳市雾的气候特点及其预报思路初探

通过统计甘肃庆阳市1971～2003年的历史资料，分析了庆阳市雾的气候特征：庆阳市年均雾日最大值出现在西峰、合水一带，雾日以秋季9月、10月和春季3月出现较多，夏季、冬季和春季4月、5月较少。对2000～2003年出现的101次雾天气条件做了分析，就形成雾的原因和环流特征做了初步探讨，并归纳提出了庆阳市雾预报的着眼点和一般的预报思路，辐射雾和平流雾分别对应两种截然相反的天气条件，要根据形成雾的天气系统环流典型场采取不同的预报思路，着重分析天气系统的演变，还要分析本地湿度、温度和风向风速等气象要素场的变化特征。     

系统聚类方法在房地产周期分析中的应用

选取了9项房地产经济波动指标，经过相关性分析，确定房地产经济综合指标体系，并运用聚类分析方法对我国房地产经济波动进行了分析，为进一步分析研究我国房地产周期提供了方法和手段。     

溢油污染对湛江生态和经济的影响与对策

结合湛江市的海洋产业结构及港口概况，对湛江港溢油污染状况进行了分析。并从可持续发展的角度，分析了溢油污染给湛江的生态和经济发展带来的影响，提出了相应的对策和建议，为湛江溢油的防治工作提供了一定的参考。     

社会经济与环境协调发展的评价指标体系及评价模型

为了建立合理和实用的社会，经济与环境协调发展的评价指标体系和评价模型，分析了社会，经济和环境指标体系具有的确定性和不确定性特征，应用基于集对分析联系度的同异反态势排序法，给出了社会，经济发展和环境功能损害态势度表示，并提出了社会，经济与环境之间协调发展满足的生长曲线指数计算公式。实例分析结果表明：基于联系度的同异反态势排序的社会，经济与环境协调发展的评价指标体系和评价模型具有简单实用的特点。     

GIS技术在滑坡稳定性分析中的应用

利用Visual Basic对象嵌入技术(OLE Automation)，将MapInfo作为一个对象使用，应用GIS空间分析和数据处理等功能，对地理信息系统平台MapInfo进行二次开发，实现了对滑坡快速有效的统计、分析和预测，并建立了区域滑坡稳定的综合判定标准。通过友好的人机交互界面实现对地震滑坡稳定性分析和综合评价，提高了地震诱发滑坡灾害稳定性分析的可操作性和空间地理信息的传输能力。     

地震动力分析的经典方法与现代计算技术

回顾了体系地震动力分析的历史过程，并对地震动力分析的传统理论方法、近似方法和现代计算技术从新的角度加以阐述，同时给出体系地震动力分析的应用前景，以促进经典的传统理论方法、近似方法和现代计算技术的综合和在实际工程中的应用，形成系统而完整的地震动力分析体系。     

井中地震用于陆相储层分析的几项技术

中国陆相储层分布广泛，类型复杂，横向变化大，勘探开发成本高，进行储层分析要求采用高新技术和综合利用多种方法。本文总结了在我国几个油区进行陆相储层分析的几项地震技术即：垂直地震剖面（ＶＳＰ）技术，多偏移距和井间层析成象技术以及多参数分析和综合解释技术，在适应我国经济发展的水平和现状的条件下，用以解决我国复杂的陆相油气储层分析的问题。     

影响岩石声发射的几个因素

以岩石的损伤本构关系为基础，分析了声发射与岩石－试验机共同作用系统稳定性的关系，重点从微观上讨论了试验机刚度和岩石均质度的影响，并从岩石破裂失稳角度分析了围压降低所引起的声发射活动性增强现象。最后考虑载荷历史的影响，得到了和主震—余震相对应的声发射模式     

R134a理想朗肯循环性能计算及分析

根据国外最新实验资料，经过理论分析和计算机绘图，给出了R134a的制冷及热泵理想朗肯循环性能计算的公式及结果，以及压力比、单位制冷量及热力性能系数对蒸发温度和冷凝温度的关系曲线图，并对其进行了分析。可供设计和研究采用这种工质的制冷设备和热泵时参考。     

桂林地区岩溶水中矿物和气体溶解量计算

本文在对桂林地区７４个岩溶水水样化学分析结果进行综合、归纳和分析之后认为，该区岩溶水化学成分是在当地雨水化学成分的基础上，经过水对岩石中的石膏、方解石及白云石和大气中的ＣＯ_２发生溶解作用而形成的。为了验证这一推论，笔者还运用质量守恒计算法，对上述水化学分析结果相对于当地雨水的矿物和ＣＯ_２气体溶解量进行了计算。文中还对岩溶水形成环境进行了分析和讨论。     

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.     

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     

Exposure ages and radiogenic ages of ureilite(GRV 024516) and ordinary chondrite(GRV 024517) from Antarctica

The GRV 024516 and GRV 024517 meteorite samples collected from Grove Montains,Antactica are ureilite and H5 ordinary chondrite,respectively.Based on the study of mineralogy-petrology,the cosmic-ray exposure ages and gas retention ages of these two meteorites were determinated and calculated.Their cosmic-ray exposure ages are 33.3 Ma,51.7 Ma,and gas retention ages are 1936.8 Ma and 3720 Ma,respectively.The ureilite contains diamond,graphite and amorphous C,which are mainly carrier of noble gases indicating obviously shock metamorphism effects,which induced 40Ar partial loss.The H5 chondrite indicates thermal metamorphism of parent body,its gas retention age fall the range between 3220 Ma and 4510 Ma of the least shocked H5 chondrites