研究称艾滋病病毒感染者应尽早戒烟

正吸烟有害健康,对艾滋病病毒感染者来说尤为正确。美国一项最新研究显示,吸烟给艾滋病病毒感染者造成的寿命损失远远超过艾滋病病毒本身。研究负责人、美国马萨诸塞综合医院的克里希纳·     

实现人口转型,推动西部开发

一、西部的人口压力实际上是传统型人口的压力开发西部 ,建设西部 ,是我国现代化建设过程中的重要一步。西部地区是指我国的重庆、四川、贵州、云南、西藏、陕西、甘肃、青海、宁夏、新疆共１０个省、区、市 ,面积５４５．１万平方公里 ,占国土总面积的５６．８% ,堪称“半壁江山”。截止１９９８年底 ,人口２．８５亿 ,占全国人口的２２．８ % ,但当年国内生产总值只占全国的１４．５５%。西部多为少数民族聚居区 ,有５０多个少数民族居住 ,占全国少数民族人口的８０% ,东西部的差距在一定程度上也是汉族和少数民族的差距。西部目前有国家…     

实现人口转型,推动西部开发

 西部的人口压力实际上是传统型人口的压力开发西部, 建设西部, 是我国现代化建设过程中的重要一步。西部地区是指我国的重庆、四川、贵州、云南、西藏、陕西、甘肃、青海、宁夏、新疆共10个省、区、市, 面积545.1万平方公里, 占国土总面积的56.8%, 堪称“半壁江山”.截止1998年底, 人口2.85亿, 占全国人口的22.8%, 但当年国内生产总值只占全国的14.55%.西部多为少数民族聚居区, 有50多个少数民族居住, 占全国少数民族人口的80%, 东西部的差距在一定程度上也是汉族和少数民族的差距。西部目前有国家重点扶持的贫困县307个, 占全国总数的50%以上。     

不同产地红花籽油中的脂肪酸的比较

采用GC/MS法测定了云南、河南、四川三个主要产地红花籽油的成分,并同已报道的新疆红花籽油的成分进行了比较,表明新疆红花籽的质量最好。为红花籽鉴别、质量标准以及资源开发提供了依据。     

我国保护动物名录

第一类保护动物蜂很(.狠)云南西双版纳和广西南部台海眼(.肢报)台湾长姆叶暇(白脸猴)喜马拉雅地区白头叶猴广西南部金丝猴四川、甘肃、湖北西部和陕西南部澳金丝狠(黑金丝狠)云南、四川西部和西藏东部叶金丝狠(灰金丝报)贵州梵净山燕长价攘广东海南岛、云南南部白.长，孩云南南部白攀长奋狱云南南部河皿新疆北部阿尔泰地区白里琢长江中下游大麟猫(花熊、白熊)四川和陕西、甘肃局部地区马来熊云南、广东、广西等地 相熊(狼班)黑龙江、新疆北部小爪水徽云南、广东、广西、福建金猫南方各省云的(龟纹的)华南和西南地区 豹(金钱豹)东南、西…     

新疆少数民族传统体育发展现状

文章采用多种调查方法,对新疆少数民族传统体育的文化特征的起源与演变进行研究,结果表明,新疆少数民族传统体育的发展呈现多元性、交融性特征,并提出新疆少数民族传统体育未来的发展方向,力求寻找发展新疆少数民族传统体育的新思路。建议开发新疆少数民族体育各种资源,重塑新疆少数民族传统体育文化价值体系,为建设富强、和谐、文明的少数民族地区传统体育提供条件。     

新疆高校少数民族学生特点及管理工作探析

新疆高校中至少有三分之一的学生为少数民族学生,少数民族学生的管理工作就显得十分重要,它关系到新疆的稳定、人才培养和现代化建设。本文结合实践,分析了新疆高校少数民族学生的特点,针对其特点,提出了几点新疆高校少数民族学生管理工作的主要措施。     

十二月与我们见面的节日

世界艾滋病日 1日 自1981年世界第—例艾滋病病毒感染者发现至今,短短30年间,艾滋病在全球肆虐流行,已成为重大的公共卫生问题和社会问题。1988年1月,世界卫生组织在伦敦召开了一个有100多个国家参加的“全球预防艾滋病”部长级高级会议,     

历时性视角下新疆少数民族大学生中华民族 共同体历史认同意识培养探析

新疆是多民族聚居地,少数民族大学生是新疆社会发展的重要人力资源.由于当前国内外不稳定因素仍然存在,新疆少数民族大学生面临着语言、学习、交往、就业、价值观等诸多问题,而其中价值观问题直接影响着新疆少数民族大学生对国家、社会的看法,影响到未来新疆民族团结、区域稳定等问题.因而为进一步加强对新疆少数民族大学生价值观培养问题,本文运用人类学历时性理论对新疆少数民族大学生的中华民族共同体的历史认同意识教育问题进行了初步探讨.     

艾滋病及其预防和控制

艾滋病是获得性免疫缺陷综合症(Acquired Immune Deficiency Syndrome)的英文缩写“AIDS”的中文译名。 1981年美国首次报道AIDS,在短短的十几年中,艾滋病极其迅速地向全球蔓延。据世界卫生组织报道到1995年底,全球艾滋病病毒感染者已达1950万人,其中450万人已经发展为艾滋病人,(?)00多万人已经死亡。我国自1985年6月首次发现艾滋病人以来,十年间艾滋病流     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

Perspherical Approaches for Electrons in Atoms and Charged Excitons in Quantum Wells

Instead of following Fock’s expansion,we solve the Schrodinger equation for some quantum mechanical manybody systems such as electrons in atoms and charged excitons in quantum wells in a similar way in hyperspherical coordinates by expanding the wave functions into orthonormal complete basis sets of the hyperspherical hannonics(HHs)of hyperangles and generalized Laguerre polynomials(GLPs)of the hyperradius.This leads the equation to     

Advances in broadband wireless communications under high-mobility scenarios

Future mobile communication systems aim at providing very high data transmission rates, even in high-mobility scenarios such as high-speed wheel-track trains, maglev trains, highway vehicles, airplanes, guided missiles or spacecraft. A particularly important commercial application is the strong and increasing worldwide demand for high- speed broadband wireless communications （up to 574.8 km/ h test speeds or 380 km/h commercial speeds） in railways, providing data, voice and video services for applications such as onboard entertainment services to passengers, train control, train dispatch, train sensor status handling and sur- veillance. In such high-mobility scenarios, there are a number of communication challenges, including fast hand- over, location updating, high-speed channel modeling, estimation and equalization, anti-Doppler spreading tech- niques, fast power control, and dedicated network architec- ture. Because signal transmission in very high-speed scenarios will inevitably experience serious deterioration, it is imperative to develop key broadband mobile communi- cation techniques for such high-speed vehicles.     

Wuhan University Journal of Natural Sciences TOTAL CONTENTS

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海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。     

Scale-based spatial data model for GIS

Being the primary media of geographical information and the elementary objects manipulated, almost all of maps adopt the layer-based model to represent geographic information in the existent GIS. However, it is difficult to extend the map represented in layer-based model. Furthermore, in Web-Based GIS, It is slow to transmit the spatial data for map viewing. In this paper, for solving the questions above, we have proposed a new method for representing the spatial data. That is scale-based model. In this model we represent maps in three levels: scale-view, block, and spatial object, and organize the maps in a set of map layers, named Scale-View, which associates some given scales.Lastly, a prototype Web-Based GIS using the proposed spatial data representation is described briefly.     

Exciton Seebeck in Molecular Systems

Various applications relevant to the exciton dynamics,such as the organic solar cell,the large-area organic light-emitting diodes and the thermoelectricity,are operating under temperature gradient.The potential abnormal behavior of the exicton dynamics driven by the temperature difference may affect the efficiency and performance of the corresponding devices.In the above situations,the exciton dynamics under temperature difference is mixed with     

Achieving Unusual States of Matter Under High Pressure

The elongation method,originally proposed by Imamura was further developed for many years in our group.As a method towards O(N)with high efficiency and high accuracy for any dimensional systems.This treatment designed for one-dimensional(ID)polymers is now available for three-dimensional(3D)systems,but geometry optimization is now possible only for 1D-systems.As an approach toward post-Hartree-Fock,it was also extended to