时间的向度——奥古斯丁《忏悔录》中的时间观探析

从古希腊的先哲亚里士多德开始,经中世纪的奥古斯丁,到18世纪的康德,再到近现代的柏格森,胡塞尔和海德格尔,哲人们对时间探索的脚步从未停止过。奥古斯丁区分了客观的时间和"内在时间"1,把时间归结为人的心灵的延展。文章以奥古斯丁的《忏悔录》为本,首先找出了奥古斯丁时间观中时间的两个向度,即时间是上帝创造的和时间是人的心灵的延展;然后对文本进行深入解读,分析奥古斯丁时间哲学的重要思想,把他的的时间观拆分为时间的受造、时间的长度、时间如何存在、时间的延展和时间如何度量等5个部分进行探析;最后着重分析了奥古斯丁的时间观的现象学效应,探讨了奥古斯丁时间观对胡塞尔现象学的影响以及二者在讨论时间问题上的差别。     

一种支持实时软件时间建模的形式化方法

随着实时系统非功能性质研究的深入,为了分析软件对系统执行时间的影响并对其进行定量分析,提出了一种支持实时软件时间建模的形式化方法。通过扩展时间通信顺序进程的时间语义,将实时系统指令执行的时间映射成为时间通信顺序进程的时间,利用时间通信顺序进程对实时软件时间建模并进行量化分析。提出的时间最优调度算法可以判断时间通信顺序进程的可达性并计算时间最优路径。通过实例验证表明,该方法可以从很大程度上提高实时系统执行时间计算的准确性,计算结果有助于实时系统执行时间的量化分析与优化设计。     

揭开时间“真容”的面纱

我们居住的世界受时间的掌控,随着我们对时间的了解越多,疑问也就越多:时间是真实的存在吗?时间会终结吗?时间是什么?幻象还是现实关于时间,有两种截然不同的看法。     

实时分布式系统的时间同步化策略

实时分布式系统必须建立统一的时间服务系统或时间服务器，以实现系统的时间统一。从时间同步着手，分析了时间同步技术——网络时间协议(NTP)和直接连接时间技术，比较了几种分布式系统的时间同步化策略。针对工程实际，参考主仆式及时间服务器的时间同步化策略，提出得到时间校正值的一种算法，并用Socket编程在某电力系统中得到实现，保证了电力系统调度自动化实时性。     

神奇的现实——扎西达娃与托尼·莫里森的魔幻叙事

扎西达娃和托尼·莫里森的魔幻叙事主要体现于其匠心独运的时间叙事和神话叙事之中.扎西达娃融合加西亚·马尔克斯循环时间叙事和藏民族轮回时间观,形成其独特的循环时间叙事,而莫里森则借鉴胡安·鲁尔福非时间的时间叙事和博尔赫斯迷宫式时间叙事,再融合非洲文化之时间观,构建其时间文本结构.他们亦利用本民族神话和传说进行神话叙事,赋予现实以神话般的意义,从而创造出神奇的现实.     

基于GPS的局域网时间同步的研究

当今社会的发展,局域网时间同步对于授时服务器的时间准确度要求越来越高。GPS作为时钟源可以很好提供准确的时钟源,采用C／S模式．客户机定时向时间服务器请求时间信息,根据双方交换的时间信息,客户机与授时服务器时间的同步,从而达到局域网的时间同步。     

具有学习与退化效应的单机排序问题

研究了具有学习效应与退化现象的单机排序问题,给出了目标函数为最大完工时间、总完工时间的多项式时间算法;并证明工件的权重与加工时间一致时加权总完工时间问题、工期与加工时间一致时最大延迟问题均有多项式时间算法.     

时间图形的双重本原

对于康德的时间图形理论,海德格尔有两种不同解释:一是认为过去构成时间的本原,只有过去才是作为时间的时间;二是认为未来构成时间的本原,未来先行规定现在与过去的综合统一,只有未来才能提供时间图形的框架结构。文章阐明:本原分为定义本原与生成本原,过去构成时间图形的定义本原,未来构成时间图形的生成本原;语言是造成双重本原的终极原因,语言(此在)是对于时间的存在建构,语言的谓词功能建构时间的未来维度,语言的名词功能建构时间的过去维度。     

时间的操作定义

关于时间是什么？牛顿在《自然哲学的数学原理》一书中对“绝对时间”给出了一个描述,爱因斯坦没有给“相对论时间”下过定义,所以到目前为止,还没有一个统一的时间定义。无论是牛顿的时间还是爱因斯坦的时间都需要用他们建立的整个理论体系去理解时间的含义,这样的结果导致普通人理解物理时间概念的困难．本文试图给时间下一个操作定义,以弥补关于时间概念在认识论上的不足。并用相关实验说明定义的正确性,最后用新的时间定义重新分析了相对论运动时钟变慢的物理原因。     

考虑多种时间因素的作业车间调度优化

为了简化模型和研究的需要,在大部分作业车间调度研究中,加工时间是主要考虑对象,但是统计表明非加工过程时间在生产制造过程中的占比超过90%。车间生产过程的调整时间、运输时间和故障时间等辅助时间在调度中有着重要作用,时间因素的忽略导致很多调度结果不能在实践中得到良好的应用。针对这个问题,根据作业车间生产实际过程,从调度的应用出发,综合分析了运输时间、调整时间、等待时间、故障时间、加工时间等多种作业车间时间,研究了多种辅助时间条件下的作业车间调度问题,建立其调度模型并设计了改进遗传算法进行求解。最后验证和比较了作业车间经典调度用例,结果显示,考虑时间因素对作业车间调度优化性有较好的改进。     

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