Design and Implementation of Multimedia Player Software Based on Embedded Technology

伴随着嵌入式硬件和软件技术的不断进步，具备低成本且高性能的计算能力的家电产品不断涌现。作为传统的家庭娱乐中心，电视也在智能化的大潮中与时俱进，搭载了Android智能操作系统的产品纷纷面世。但在主要的使用场景：媒体播放领域中，由于Android系统自带的媒体播放器功能较弱，其成熟度无法满足电视的产品需求。因此如何让媒体播放系统更加好用，是决定产品品质的一大因素。 本文介绍了多媒体播放系统设计和实现，系统组成主要分为外存设备扫描、数据存储、主体控制、播放器、播放列表五部分，对系统主要架构进行了详细介绍，并对相关流程进行了分析。本文提出设计并实现的多媒体播放器融合了图片及音视频等多种媒体类型的一...With the progress of embedded hardware and software, Home appliances are capable of both low cost and high performance. As the tranditional entertainment center of the home, Television's ability gets upgraded as well. More and more TV sets which installed Android system appearing in the market now. But for media playing, which is major use case for TV, the native media player of Android system can...学位：工程硕士院系专业：软件学院_工程硕士(软件工程)学号：X201223115

基于粗糙集聚类的高维离群点数据挖掘算法

本文回顾了离群点数据挖掘技术的研究成果,对高维离群点数据挖掘技术进行了简要的评述,并在此基础上提出了一种基于粗糙聚类的高维离群点数据挖掘的算法,采用粗糙集方法选择出最优子空间,直接对高维空间数据进行聚类,并对子空间离群点进行数据挖掘,取得了良好的效果。国家教育部“新世纪优秀人才支持计划”(NCET-04-0608)资助

Application of SAR Models on Farmer's Income of Inter-provinces and Inter-counties

本文利用各省财政农业人均支出、农村人均用电量作为解释变量,建立了农民人均收入空间自回归(SAR)模型。模型数据分析表明:我国农民人均收入存在明显的空间自相关现象,它反映了省际农民收入存在聚集效应;农民人均收入对财政农业人均支出、农村人均用电量存在明显的空间依赖性;财政农业支出对农民增收产生积极的正面影响,农村用电量是衡量农民收入水平的重要有效指标。考虑到省际间差异可能太大,文章还对福建省67个县市进行了同样的问题研究,并得出了相似的结论。Using the government expenditure for agriculture and rural electricity consumption as explanatory variables,this paper establishes spatial autoregressive models(SAR) for farmer's income per capita.The results indicates the following facts: the phenomena of spatial auto-correlation obviously exist in farmer's income,which shows that inter-provincial farmer's income exists clustering effect;farmer's income has significant spatial dependence on government expenditure for agriculture and rural electricity consumption;government expenditure for agriculture has positive effect on farmer's income and rural electricity consumption is an important index to reflect farmer's income level.Considering the big differences among provinces,the authors even study the same problem for 67 counties of Fujian Province and draws the similar results

词典话语与社会互动:《新英汉词典》例证的历时对比分析

文章将词典话语视为语境重构的过程,以Fairclough的话语与社会互动观以及van Dijk的社会认知观为分析视角,对《新英汉词典》不同版本的例证进行历时对比分析,揭示了语言使用和社会共变的事实,反映了词典话语与社会相互建构的关系,由此得出结论:将词典作为话语并置于批评性语篇分析的框架下进行研究有助于拓展并完善词典批评体系

家电制造业上市公司经营绩效的实证分析

近几年家电制造业上市公司经营业绩呈现下滑趋势 ,一些大型家电制造商在 2 0 0 1年陷入严重亏损 ,究其原因 ,营业费用比率的逐年过度上涨占很大一部分。本文试以实证的方法来分析两者的相关性 ,并且从中发现问题 ,提出相应的建

The Cluster Analysis of Panel Data and Its Application

不同于传统的计量建模分析,本文探讨了多元统计方法在面板数据分析上的运用。文中介绍了面板数据的统计描述方法,构造了面板数据之间相似性的统计指标,并在此基础上提出了面板数据聚类分析的有效方法,通过实际应用取得了良好的效果。Unlike the traditional econometric modeling analysis,this paper discusses the application of multivariate statistical methods for panel data.It introduces the statistical description of panel data and constructs the statistical indicators for the similarity of the data,and thereby the method of clustering panel data is proposed.Finally,the method is proved to be effective through the practical application.国家教育部“新世纪优秀人才支持计划”(NCET-04-0608)资助;; 国家教育部社科研究规划项目(06JA910003)资助

Reserch Progresses in Ferrous Oxidation System of Acidithiobacillus ferrooxidans

氧化亚铁硫杆菌(ACIdITHIObACIlluS fErrOOXIdAnS)为无机化能自养菌,革兰氏阴性,能在极端酸性环境中生长。由于在生物冶金中的应用及特殊的生理学效应,该菌受到研究者的广泛关注。A.fErrOOXIdAnS能氧化亚铁、元素硫及还原态硫化物获得电子,并通过一系列电子载体将电子传递给氧生成水,同时释放能量供生命活动需要。目前对A.fErrOOXIdAnS电子传递系统的研究主要集中于亚铁氧化电子传递系统,已发现多种与亚铁氧化电子传递相关电子载体和操纵子,如电子载体铜蓝蛋白(ruSTOCyAnIn,ruS)、细胞色素C(CyTOCHrOME C,CyC)、细胞色素C氧化酶(CyTOCHrOME COXIdASE,COX)、亚铁氧化酶(IrO)、细胞色素bC1复合物(CyTOCHrOME bC1 COMPlEX,bC1)等,以及ruS操纵子和PET操纵子。综述了近年来有关A.fErrOOXIdAnS亚铁氧化电子传递链相关蛋白载体,ruS和PET操纵子结构与功能及表达调控等方面的研究进展。Acidithiobacillus ferrooxidans(A.ferrooxidans) is a sort of gram-negative,obligate autotrophic bacterium which can be capable of growing in extreme acidic environments.A.ferrooxidans has attracted great interest because it has been used in industrial mineral processing and features unusual physiology characteristics.A.ferrooxidans derives energy by oxidizing ferrous iron,elemental sulfur and its reduced compounds,during which the electrons are transferred to oxygen through a series of carriers.At present,the researches about oxidative system of A.ferrooxidans have mainly focused on the ferrous oxidation system,and several electron carriers and operons involved in ferrous oxidation have been identified,such as electron carrier Rustocyanin(Rus),Cytochrome C(Cyc),Cytochrome C oxidase(Cox),ferrous oxidase(Iro),cytochrome bc1 complex(bc1),and rus and pet operons.In this paper,the recent research progresses on structure and function and expression regulation of several electron carriers and operons(rus and pet operons)in A.ferrooxidans were discussed.海洋公益性科研专项(200805032);国际海底区域研发项目(DYXM-115-02-2-07);国家重点基础研究前期项目(2006CB708200

Reduced-order Observer-based H_∞ Controller Design for Descriptor Systems

本文研究基于Luenberger观测器的广义系统降阶H∞控制器的设计问题,并且该观测器是关于干扰解耦的。首先是提出了广义系统H∞状态反馈控制问题的一个充要条件,并利用线性矩阵不等式方法求解出广义系统的H∞状态反馈增益。然后对该H∞状态反馈增益进行渐进降阶观测,基于广义Sylvester矩阵方程的显式通解的参数化设计方法,实现了广义系统的降阶H∞控制。本文最主要的工作是给出了相应的广义线性系统降阶H∞控制器的设计算法。在文章的最后给出了一个例子,用来说明降阶算法的有效性。This paper presents the design of a robust reduced-order Luenberger observer-based H∞ controller for the descriptor system.This observer is with disturbance decoupling.A necessary and sufficient condition for the H∞ state-feedback control problem of descriptor systems is established.Based on the parametric design approach for generalized Sylvester matrix equations,a reduced-order H∞ controller for descriptor systems is obtained.One major contribution of the present work is that a design algorithm for constructing the reduced-order H∞ controller is presented.An illustrative example is also given.福建省自然科学基金(A0510002)资助;; 厦门大学985二期信息创新平台项目资助;; 福建省新世纪优秀人才支持计划资

丹江口水库赤眼鳟(Squaliobarbus curriculus)遗传多样性的RAPD和ISSR分析

利用RAPD和ISSR两种分子标记技术,分析了丹江口水库野生赤眼鳟30个个体的遗传多样性。用11个RAPD引物对其基因组DNA进行扩增,共获得101个重复性好且谱带清晰的扩增位点,片段大小在100—3000bp之间,其中多态性位点63个,多态位点比例为62.38%;个体间遗传距离在0.1049—0.3417之间,平均为0.1742。用10个ISSR引物共检测到88个位点,其中多态性位点61个,多态位点比例为69.32%;个体间遗传距离在0.1088—0.3847之间,平均为0.1907。结果显示,丹江口