简谈理想玻色原子气体的BEC

本文描述了理想玻色气体的玻色一爱因斯坦凝聚（BEC）现象,讨论生成BEC现象的临界温度条件,从量子统计解释了BEC现象．对三维体系,指出了当分子间的平均距离火于分子热运动的德波罗意波长是就能产生BEC现象．从讨论BEC态的热容量可知当温度低于临界温度时,正常态的热容量产生突变即存在相变．     

相对论粒子在晶格中相关散射

本文采用与粒子运动纵向分量相同的坐标系来考察相对论粒子同晶格原子相关碰撞及其量子辐射。通过相对论变换,使三维运动问题转化为两维问题(轴向沟道运动)或一维问题(面沟道运动),从而大大简化了计算步骤,并以几种典型的相互作用势,讨论了沟道轻粒子在晶格中运动时束缚态之间的跃迁。用Moliere势计算出MeV电子在晶格轴向沟道中运动时发射与韧致辐射不同的量子辐射谱的特征,与实验结果相当符合。     

基于L-系统的植物结构模拟

为建立效果逼真的三维植物结构模型,在L-系统模拟植物形态的基本理论和方法的基础上,对L-系统的可解释的符号集合进行扩展,能灵活地控制龟在三维空间中的运动,便捷地改变枝条的直径,配合适当的材质,可形成较逼真的三维植物结构形态。     

不确定关系的几点注记

指出不确定关系从波包导出的不严密性 ,微观粒子的运动由量子统计规律决定。在解释量子力学的两个典型事例的基础上 ,阐述不确定关系的两方面意义     

缓释量子点示踪剂产出剖面解释方法

针对水平井产出剖面测试需求和传统生产测井技术的局限性和建立数字化油田所需的单井生产数据不够精细，提出了量子点示踪剂产出剖面测试技术，对长水平井进行长时间生产动态监测。本文建立了瞬态监测阶段和稳态监测阶段量子点示踪剂产出模型，提出了量子点示踪剂产出剖面采样、检测和解释的流程。通过1口水平井的应用论证了智能示踪剂技术在监测水平井各段油水产量的有效性，说明了量子点示踪剂监测技术具有连续分相态、分段监测井下生产动态的功能。智能示踪剂产出剖面测试与解释技术可以实时监测一口井的生产健康情况，发现产水段，为见水井精细调剖堵水提供帮助，为数字化油井和油田的建立提供精细化的数据。     

光压和光能在真空中的定性研究

利用自制的光旋转仪方便直观地实现了对光能、光压和光强的定性研究,对不同真空度、不同的入射光条件下观察到的各种现象,利用气体分子热运动理论和光的量子理论给出了完整的理论解释。     

基于超弦模块理论的光子运动表达模型

通过物理逻辑,提出一种光子运动表达模型;工作单元,对外是量子性、相对性,对内部也是;该假说,是基于超弦模块理论,可解释光子波粒二重性现象,在光学、微电子、理论物理研究上,有参考与应用价值。     

基于超弦模块理论的光子运动表达模型

通过物理逻辑,提出一种光子运动表达模型;工作单元,对外是量子性、相对性,对内部也是;该假说,是基于超弦模块理论,可解释光子波粒二重性现象,在光学、微电子、理论物理研究上,有参考与应用价值.     

基于超弦模块理论的光子运动表达模型

通过物理逻辑,提出一种光子运动表达模型;工作单元,对外是量子性、相对性,对内部也是;该假说,是基于超弦模块理论,可解释光子波粒二重性现象,在光学、微电子、理论物理研究上,有参考与应用价值.     

基于ADAMS软件的三维运动混合机仿真

建立了三维运动混合机ADAMS仿真模型,并应用该模型对三维运动混合机进行了运动学仿真分析.仿真分析结果为三维运动混合机设计提供了理论依据.     

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)

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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.