西藏藏族人口出生性别比和幼儿及儿童性别比浅析

本文以第4次人口普查资料为依据，对西藏藏族人口出生性别比和幼儿及儿童性别比作出初步分析，以希对西藏人口学研究有所辅益。     

基于“六普”数据的山东省人口性别结构特征与调控对策探讨

通过对全国和山东省第六次人口普查数据的分析,概括总结了目前山东省人口性别结构在总人口性别比、出生人口性别比、少儿组人口性别比、地区差异及城乡差异等五方面的主要特征；探讨了山东省人口性别结构的成因及社会经济效应,在此基础上,提出山东省人口性别结构调控的对策建议.     

基于六普数据我国省域出生人口性别比的空间计量分析

本文以2010年"六普"数据为基础,分析了各省市出生人口性别比的空间特征,并基于空间模型检验了经济、教育、医疗及计划生育政策对我国各省域出生人口性别比的影响,本文的分析表明我国省域人口性别比集聚现象比较明显,有相似属性值的地方聚集在一起,整体呈现出东高西低的格局,在考虑了空间因素后,经济、教育、医疗及计划生育政策对性别比的影响有了明显改变,再次肯定了地理因素对性别比的影响.     

低生育水平与出生性别比偏高的后果

 一、问题的提出 自７０年代实行计划生育政策以来,我国生育率出现了急速且持续的下降,人口控制取得了显著成效。然而,任何收益都有代价,在我国实现低生育的同时,也出现了出生性别比偏高等一系列问题。 经验数据表明,出生性别比的正常范围一般在１０３～１０７。而自８０年代,尤其是８０年代中期以来,我国的出生性别比出现了偏高且持续上升的趋势。１９８０年我国的出生性别比为 １０７．４, １９８５年上升为 １１１．４, １９９０年达到 １１４． ７３, １９９５年更高达１１７． ４。因此,海内外对我国出生性别比偏高可能引起的婚姻后果表示了广泛的关注与担忧。甚至以此作为中国应放松与调整计划生育政策的理由。     

近年山东省人口性别比的变动研究

简要概括了新中国建立至第五次人口普查(以下简称五普)山东省人口性别比的特征,阐述了五普以来该省人口性别比的变动情况;重点通过具体的数据分析,将人口自然增长、人口迁移和产业结构等因素确定为影响目前山东人口性别比变动的主要因子;最后在上述基础上从三个方面提出了维持山东省合理性别比相应的对策建议.     

重庆市农村出生人口性别比失衡的成因及对策

随着计划生育、控制人口增长战略的不断推进,重庆市人口出生增长率明显下降。出生人口性别比不断上升,明显超过国际标准值,尤其是重庆市农村出生人口性别比严重偏高。对重庆市农村出生人口性别比严重偏高的现象、影响及其原因进行了分析,并提出对策。     

利用信息化管理平台控制出生人口性别比

出生人口性别比的失衡一直是我国计划生育工作的棘手问题。为落实综合治理出生人口性别比的各项措施,充分利用信息化手段提高行政效能和管理水平,规范行政许可行为,促进对批准再生育人员孕前——围孕期保健工作开展,推动综合治理出生人口性别比各项措施的落实。一直是我们江苏兴化市人口和计划生育委员会研究的课题。实践证明,通过信息化管理平台控制出生人口性别比的方法是切实可行的和必要的。     

低生育水平与出生性别比偏高的后果

一、问题的提出 自７０年代实行计划生育政策以来,我国生育率出现了急速且持续的下降,人口控制取得了显著成效。然而,任何收益都有代价,在我国实现低生育的同时,也出现了出生性别比偏高等一系列问题。 经验数据表明,出生性别比的正常范围一般在１０３～１０７。而自８０年代,尤其是８０年代中期以来,我国的出生性别比出现了偏高且持续上升的趋势。１９８０年我国的出生性别比为 １０７．４, １９８５年上升为 １１１．４, １９９０年达到 １１４． ７３, １９９５年更高达１１７． ４。因此,海内外对我国出生性别比偏高可能引起…     

少生不是一切

围绕人口增长问题而设计的传统人口控制战略是一个非均衡的发展战略,已经带来了比我们当初预想更为严重的人口安全和社会安全问题,突出表现在出生婴儿性别比持续的和普遍的失调以及作为社会基本细胞的计划生育风险家庭和问题家庭的增多上,独生子女家庭和双女家庭养老功能的缺损只是其中比较引人注目的表现而已。根据对第五次全国人口普查数据的分析,我国农村独生子女夭折率大概为0.8%,规模已达数十万。城镇地区也有一定的比例和规模。不少家庭在遭遇大龄独生子女意外伤亡的毁灭性打击时丧失了再次生育的可能性,陷入了老无所养、老无所亲的困…     

安徽省出生人口性别比失衡的现状及对策——基于第六次全国人口普查数据

自二十世纪八十年代中国政府实行计划生育政策后,安徽省出生人口性别比就开始出现失衡现象,这是多种因素综合产生的结果。它造成了人口结构的不合理,同时还严重影响婚姻市场的配对、人口再生产以及家庭和社会的和谐。必须采取加快经济发展步伐、建立健全社会保障体系、运用社会公共政策等措施来影响人们生育观念的转变,弱化人们的性别偏好,使出生性别比失衡从根本上得到解决。     

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…     

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。     

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     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

正~~     

An on-line scaling method for improving scalability of a database cluster

The explosive growth of the Internet and database applications has driven database to be more scalable and available, and able to support on-line scaling without interrupting service. To support more client's queries without downtime and degrading the response time, more nodes have to be scaled up while the database is running. This paper presents the overview of scalable and available database that satisfies the above characteristics. And we propose a novel on-line scaling method. Our method improves the existing on-line scaling method for fast response time and higher throughputs. Our proposed method reduces unnecessary network use, i.e. , we decrease the number of data copy by reusing the backup data. Also, our on-line scaling operation can be processed parallel by selecting adequate nodes as new node. Our performance study shows that our method results in significant reduction in data copy time.     

An improved R-tree based on childnode''s probability

R-Tree is a good structure for spatial searching. But in this indexing structure,either the sequence of nodes in the same level or sequence of traveling these nodes when queries are made is random. Since the possibility that the object appears in different MBR which have the same parents node is different, if we make the subnode who has the most possibility be traveled first, the time cost will be decreased in most of the cases. In some case, the possibility of a point belong to a rectangle will shows direct proportion with the size of the rectangle. But this conclusion is based on an assumption that the objects are symmetrically distributing in the area and this assumption is not always coming into existence. Now we found a more direct parameter to scale the possibility and made a little change on the structure of R-tree, to increase the possibility of founding the satisfying answer in the front sub trees. We names this structure probability based arranged R-tree (PBAR-tree).     

Integrating GIS Web services based on mediating architecture

The geographic information service is enabled by the advancements in general Web service technology and the focused efforts of the OGC in defining XML-based Web GIS service. Based on these models, this paper addresses the issue of services chaining,the process of combining or pipelining results from several interoperable GIS Web Services to create a customized solution. This paper presents a mediated chaining architecture in which a specific service takes responsibility for performing the process that describes a service chain. We designed the Spatial Information Process Language (SIPL) for dynamic modeling and describing the service chain, also a prototype of the Spatial Information Process Execution Engine (SIPEE) is implemented for executing processes written in SIPL. Discussion of measures to improve the functionality and performance of such system will be included.     

Tracking data management using topology of moving object database system for moving object constrained trajectory in LBS application

Advances in wireless technologies and positioning technologies and spread of wireless devices, an interest in LBS (Location Based Service) is arising. To provide location based service, tracking data should have been stored in moving object database management system (called MODBMS) with proper policies and managed efficiently. So the methods which acquire the location information at regular time intervals then, store and manage have been studied. In this paper, we suggest tracking data management techniques using topology that is corresponding to the moving path of moving object. In our techniques, we update the MODBMS when moving object arrived at a street intersection or a curved road which is represented as the node in topology and predict the location at past and future with attribute of topology and linear function. In this technique, location data that are corresponding to the node in topology are stored, thus reduce the number of update and amount of data. Also in case predicting the location,because topology are used as well as existing location information, accuracy for prediction is increased than applying linear function or spline function.