一种网络实时传送MP3数据流的嵌入式播放器解决方案

介绍了网络接口方案和MP3解码方案的选择,提出了一种嵌入式网络MP3实时播放器,并详细介绍了嵌入式播放器系统的设计和MP3解码芯片STA015的应用。     

基于SL811HS的U盘MP3播放器设计

本文提出了一种以U盘为存储介质的MP3播放器设计方案，并论述其软硬件设计方法。该方案采用ARM7处理器芯片S3C4480X，采用SL811HS作为USB主控芯片，将U盘中的MP3文件读取出来井进行播放，实现了MP3播放器中解码单元与存储单元的分离。     

MP3播放器使用中的几个问题

本文介绍了如何利用“豪杰超级解霸3000”软件工具来解决 MP3播放器不能播放从网上下载的 MP3文件,以及如何将 VCD 光盘的音频信息转换为 MP3文件格式。     

一种基于通用单片机的MP3播放器解决方案

讨论了一种基于通用单片机的MP3播放器解决方案。它采用Intel体系的8位单片机作为系统控制器，利用USB接13下载MP3歌曲，用Compact flash card存贮MP3文件。详细说明了控制器通过USB接口和上位机通讯，控制器和Compact flash card的接口设计，MP3解码芯片的STA013的使用，数字语音信号通过D／A转换器CS4334转换为模拟语音信号。由于采用的是通用的单片机实现的，该种MP3播放器可以很容易地移植到其它微控制器系统中，使设备兼具MP3播放功能的设备。     

基于单片机的便携式MP3播放器设计

采用AT89C51SND1C单片机作为主控芯片,K9F2808U0A芯片作为Flash存储器,设计一款实用的便携式MP3播放器.重点介绍了播放器的硬件设计方案和软件设计思路.设计的播放器功耗低,性能好,实用性强.     

给你的耳朵找个情侣 轻轻松松选购个MP3播放器过春节

一款好的MP3播放器,除了要有优越的性能、漂亮的外观外,价格的适中也很重要。毕竟,MP3摇放器使用群体主要集中在18岁至30岁,对于很多学生用户而言,价格过高还是很难接受。今天,笔者就要向大家详细介绍MP3的选购,同时,也为大家推荐多款不同档次的播放器,希望能对想要购买MP3播放器的朋友,多出一个不错的选择。也希望大家能够在度过一个充满音乐的春节。     

MP3播放器导购指南

前言在过去的几年中,MP3技术飞速发展,目前已经成为了最为流行的音乐格式之一。能够随时聆听自己喜欢的音乐是人生一件快乐的事情,以前我们流行用WALKMAN或者是CD播放机来随身欣赏音乐,现在,如果你再用这样播放机听音乐已经非常落后了,而今越来越多的朋友们已经看中了MP3播放器这种流行的音乐播放工具。MP3播放机具有体积小、重量轻、防震动、便于携带、功耗低、连续播放时间长而又无机械磨损等特点,赢得了人们的欢心。同时,MP3播放器经过这么多年的发展改进,已经越来越近     

真情奉献 MP3选购技巧十五绝招

今年3·15的主题是健康维权,随着数码科技的进步,MP3产品已经随处可见,拥有一款造型小巧的MP3成为了一种时尚潮流。但面对市场上品牌繁多、造型各异、功能有别的MP3,真有点眼花缭乱的感觉。如何选择一款好的MP3播放器,选购时应该注意些什么呢?我们真情提供MP3选购技巧十五绝招。     

嵌入式Linux多媒体播放器的改进及实现

针对现有播放器的功能,以目前流行的嵌入式Linux操作系统及Qtopia环境下的开源多媒体播放器代码为基础,改进原播放器源码,实现了支持包含MP3音频文件和MPEG4视频文件播放的媒体播放器及文件加载模块的多媒体文件浏览功能,通过制作新的播放器皮肤,来美化显示界面。调试结果显示,各种功能在硬件开发平台GT2440上得以验证。     

几款惹人喜爱的MP3

2004年即将走过,MP3音乐播放器对于我们来说已经不是一件陌生的产品或者是一件高高在上的产品了。价格、技术的成熟,让更多的消费者都能体会到数码音乐的乐趣。回顾2004年,MP3轻薄化、硬盘存储的崛起,产品铺天盖地的出现在我们面前,那么什么才是最受音乐人喜爱的 MP3呢?什么样的 MP3才是值得我们去选择的呢?     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

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.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

Quantitative trait loci （QTLs） for quality traits related to protein and starch in wheat

Quality traits in wheat （Triticum aestirum L.） were studied by quantitative trait locus （QTL） analysis in a recombinant inbred line （RIL） population, a set of 131 lines derived from Chuan 35050 × Shannong 483 cross （ChSh）. Grains from RILs were assayed for 21 quality traits related to protein and starch. A total of 35 putative QTLs for 19 traits with a single QTL explaining 7.99-40.52% of phenotypic variations were detected on 10 chromosomes, 1D, 2A, 2D, 3B, 3D, 5A, 6A, 6B, 6D, and 7B. The additive effects of 30 QTLs were positive, contributed by Chuan 35050, the remaining 5 QTLs were negative with the additive effect contributed by Shannong 483. For protein traits, 15 QTLs were obtained and most of them were located on chromosomes 1 D, 3B and 6D, while 20 QTLs for starch traits were detected and most of them were located on chromosomes 3D, 6B and 7B. Only 7 QTLs for protein and starch traits were co-located in three regions on chromosomes 1D, 2A and 2D. These protein and starch trait QTLs showed a distinct distribution pattern in certain regions and chromosomes. Twenty-two QTLs were clustered in 6 regions of 5 chromosomes. Two QTL clusters for protein traits were located on chromosomes 1D and 3B, respectively, three clusters for starch traits on chromosomes 3D, 6B and 7B, and one cluster including protein and starch traits on chromosome 1D.     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.