概率扩张与概率赋范空间中非线性方程的解

给出了概率扩张的定义，并研究了概率赋范空间中非线性方程解的存在性和唯一性     

正态概率赋范空间

研究正态随机变量等价类构成的正态广义概率赋范空间及其拓朴结构，讨论了零均值的正态ＧＮ空间的一些性质。     

前兆异常区地震危险性概率的评估方法

讨论了根据前兆观测估计地震危险性概率的问题,给出了单学科观测异常区和多学科观测异常区地震的危险性概率的评估方法。利用３ 个先验概率值,即地震背景概率—Ｐ（Ｂ）、孕震条件下某学科观测发生异常的概率—Ｐ（Ａｉ／Ｂ）、非孕震条件下某学科观测发生异常的概率—Ｐ（Ａｉ／Ｂ）,就可计算：①异常区有震概率（也称有震报准概率）Ｐ（Ｂ／Ａ） 或Ｐ（Ｂ／ ∩ｎｉ＝ １Ａｉ） 和异常区无震概率（也称虚报概率）Ｐ（Ｂ／Ａ） 或Ｐ（Ｂ／ ∩ｎｉ＝ １Ａｉ）;②非异常区有震概率（也称漏报概率）Ｐ（Ｂ／Ａ）或Ｐ（Ｂ／ ∩ｎｉ＝ １Ａｉ）和无异常无震概率（也称无震报准概率）Ｐ（Ｂ／Ａ） 或Ｐ（Ｂ／ ∩ｎｉ＝ １Ａｉ）。通过几组模拟数据的计算,可初步得出结论：①对于单学科观测,降低非孕震异常概率,即减小干扰,可提高报准概率;②多学科观测同时出现异常,将提高报准概率,但漏报概率也将显著增加。     

三维电阻率概率成像法研究

电阻率概率成像法是利用地表电场的测量值与电场扫描函数进行归一化的相似程度作为概率的成像方法。根据概率论的基本理论,引入幂函数并推导了电阻率异常发生概率函数。通过数值模型实验对此方法进行了验证,对多个孤立异常体和凹陷模型进行了概率成像。通过对浙江某地实测资料概率成像结果与常规最小二乘法反演结果进行比较表明,三维电阻率概率成像法能较好地分辨地下地电结构。     

概率赋范空间的S-凸和K-凸

文献[1][2]认为M－PN空间是局部凸的。通过定理说明这个结论对t-模T（a,b)≥min(a,b)时成立。又通过反例表明，当t-模型T（a,b)=max(a b-1,0）时无论邻域Nθ（ε，λ）概率有界还是概率半有界结论均不成立。还讨论了Takahashi凸性并对S－凸和K－凸作了比较。     

随机变量导出的广义概率赋范空间及拓扑

本文给出了广义概率赋范空间(简称GN空间)的定义,由随机变量及分市函数族构造出一个在T_m下的GN空间,在一般情形证明了此空间是T_1 型的拓扑线性空间,基于PN空间的收敛性质,证明了Bernoulli大数定律,并指出了在随机变量分布合成方面的应用。 在传统的PN空间理论中,分布函数F_(pq)(x)示E中p点与q点之间的距离小于xΞR的概率,在PN空间中,概率范数f,(x)作为表示B空间中p点的范数小于XΞR的慨率,如果将普通随机变量p小于XΞR的概率F,(x)作为p点的广义概率范数,由此导出的空间,正是本文讨论的GN空间。     

关于PN空间线性算子概率范数的讨论

利用单位圆N（0,1）讨论PN空间中线性算子的概率范数的几个性质。     

锚杆不确定性对加固边坡失稳概率的影响

为了探究锚杆不确定性对加固边坡失稳概率的影响, 建立了施加锚杆后的边坡模型, 通过以下两种途径来考虑锚杆的不确定性: 其一是假定锚杆与锚固体之间接触面上的单位表面摩擦力为对数正态分布变量, 其二是引入锚杆与锚固体之间接触面上的单位表面摩擦力衰减系数来考虑运营过程中锚杆的不确定性。采用极限平衡分析法并结合蒙特卡罗抽样法, 计算并对比分析了两种途径下锚固边坡失稳概率变化曲线, 最后以深圳假日酒店基坑边坡支护工程为例, 证明所提方法的有效性。结果表明: 对于途径一, 在相同土体统计参数下, 随着锚杆与锚固体之间接触面上单位表面摩擦力变异系数的增加, 加固边坡的失稳概率缓慢增加, 增幅介于18.03%~41.90%之间。对于途径二, 随着锚杆衰减系数自1.0逐步减小至0, 加固边坡失稳概率迅速增加, 增幅介于55.64%~124.90%之间; 在同一衰减系数下, 加固边坡失稳概率随着锚杆衰减根数的增加而增大。研究结果可以为锚杆施工与运营期间的管理提供决策支持。      

中国大陆地壳垂直运动高梯度区与强震危险区发震概率估计

概述了中国大陆地壳垂直形变速率梯度的分布特征，统计了１９６０～１９９３年间大陆Ｍ≥６．０级地震与高梯度区的对应关系．从构造物理的角度论证了形变速率高梯度区是未来可能的强震危险区，采用贝叶斯公式估算了主要地震危险区的发震概率。     

PN空间中的概率有界性特征

本文对PN空间中的概率有界集、半有界集和无界集的特征作了一些讨论。     

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.     

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