嵌入式Linux系统的移植研究

介绍嵌入式系统和嵌入式系统中的GUI，详细说明三种常见的嵌入式GUI系统（Microwindows、MiniGUI和QT）的设计结构和使用上的优缺点，描述Microwindows基于ARMLinux平台的移植．     

嵌入式系统上的图形界面输入引擎的研究

嵌入式系统上的图形用户界面（GUI）由于基于不同的软硬件平台，输入设备有很大差别，所以开发者在移植时要为不同的输入设备开发其与GUI之间的接口，以使得GUI能够正确响应用户的输入。GUI的输入引擎就是介于GUI处理核心和操作系统的输入设备驱动程序之间的一组抽象接口，它的功能是使不同的输入设备的驱动程序能够无缝地连接到GUI的消息处理程序中。因此，输入引擎可以改善GUI的可移植性。在基于at91rm9200微处理器和嵌入式Linux操作系统的软硬件平台上．讨论了开发GUI输入引擎的一般方法，并结合一个具体的GUI系统——MiniGUI，给出了一个输入引擎实例的开发过程。     

一种小型嵌入式GUI系统的设计

图形用户界面系统是嵌入式系统的重要组成部分,目前已经出现了很多较为成熟的嵌入式GUI,但是系统偏于复杂。针对小型嵌入式系统,采用层次化、模块化、面向对象的思想,提出了一种轻量的嵌入式图形用户界面（GUI）系统,在一定程度上适用于小型的嵌入式产品。     

嵌入式Linux系统中MiniGUI的研究与移植

随着嵌入式系统的发展,为产品设计出友好便利的交互界面是当前嵌入式技术研究的一个热门领域.在有限的硬件资源条件下,根据使用需求设计出简单、直观、可靠、占用资源少且反应速度快的GUI变得尤为重要.MiniGUI作为主流的嵌入式GUI系统之一,成为嵌入式GUI领域研究中的一个重点.首先介绍了嵌入式Linux系统,然后分析了MiniGUI的体系结构和主要优势,最后详细描述了MiniGUI在S3C2410上的移植过程.     

嵌入式系统下的图形用户界面设计

图形用户界面（GUI）是用户与嵌入式产品之间的对话接口,图形用户界面设计的好坏,将直接影响嵌入式产品的使用.目前市面上流行的嵌入式GUI系统很多,但它们都需要大量的硬件资源支持.为了设计出高效的轻量级嵌入式GUI系统,根据其软硬件需求和功能需求,提出对Nano-X进行改进的设计方法,并给出了具体的改进步骤.     

基于嵌入式STM32平台的μC/GUI人机交互界面设计

针对目前人机交互界面越来越复杂的应用需求,设计了基于Cortex TM-M4F内核的ARM嵌入式系统μC/GUI人机交互的实现方案,介绍了μC/GUI的窗口管理机制以及移植开发应用。实验表明,嵌入式系统中采用μC/GUI的设计方法,为人机交互LCD驱动移植及实现提供了参考,在嵌入式系统应用环境下,具有较好的实用性和通用性。     

基于嵌入式ARM—Linux系统的MiniGUI应用设计

MiniGUI是国内著名的为数不多的几个自由软件之一,也是目前比较成熟的嵌入式GUI产品．它是根据嵌入式系统的应用特点量身定做的图形支持系统,具有小巧、可配置和可移植等特点．本文分析了MiniGUI在嵌入式ARM—Linux系统中的移植与配置过程,详细介绍了在交叉编译环境下开发MiniGUI程序的方法和步骤．     

基于Qtopia Core的嵌入式Linux GUI平台移植与开发

随着嵌入式系统软硬件的高速发展,应用设备GUI成为这一领域研究的一个重点,如何快速有效的构建友好界面的嵌入式GUI已成为嵌入式软件开发一个瓶颈。文章介绍了面向单一应用的Qtopia Core在嵌入式LINUX上GUI实现机制与平台移植,并结合实例阐述了基于Qtopia Core的应用程序开发流程。     

嵌入式系统封装功率器件的可靠性建模研究

该文基于对嵌入式系统封装功率器件可靠性建模的研究,首先,阐述嵌入式系统封装功率器件可靠性建模研究的必要性。其次,分析嵌入式系统封装功率器件发展,其中包括一般封装发展、功率器件发展。最后,对嵌入式系统封装功率器件的可靠性建模进行分析,主要包含嵌入式系统封装分析、封装可靠性分析、焊点可靠性分析等。     

基于嵌入式Linux的渔探系统

针对渔探仪发展的现状,提出了一种基于嵌入式Linux的渔探仪系统.该系统将图形用户界面构建在嵌入式Linux和嵌入式GUI库之上,具有视窗风格,界面美观,用户操作方便.GUI库的引入在很大程度上提高了开发效率.多进程的设计保证了系统的响应速度,同时通过软件结构和软件算法上的优化,提高了系统性能.     

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.