让耳机拥有5.1声道的音响效果

5.1声道的音响效果,是每一位喜欢欣赏音乐朋友的首选,但如果不具备5.1音响的硬件环境,那就不能够享受5.1声道音响带来的震撼效果。不过如果你安装了SRS     

迷你影院

如果为自己的PC配备了最新的5.1声道声卡你肯定想的是立即感受环绕声场的效果。但相对几百元的声卡来说,一套令人满意的5.1声道音箱加上AV功放的价格就是天文数字了。幸好市场上还有各种多媒体有源音箱,这些小型音箱可以在不高的价位上提供相对性价比较高的音响效果。联志科技推出的5.1声道DIGITALLEGION PM-520就是多媒体有源音箱     

放在卧室中的音箱—金河田JHT—503家庭床头音响

在目前音箱的产品发展方面，多声道产品和数码产品更是备受瞩目。随着DVD驱动器和多声道输出声卡价格的下降，家庭影剧院的配置方案被更多的家庭用户所接受，由此辅助推动的无疑是5.1声道音箱市场的发展。在此情况下，5.1声道音箱市场的需求量和被认可程度大大增强。近期国内各主流音箱厂商都纷纷推出了多款基于5.1声道的音箱产品来迎合市场的需要。金河田也随之推出了这款全新概念的5.1音箱新品—JHT-503家庭床头音响。既然称为“家庭床头音响”，那么可以想像到该产品的外形一定会给大家带来一个意外。从包装箱就可以清晰的看到该款音…     

让5.1音箱发出天籁之音

5.1音效系统就是使用5个喇叭和1个超低音扬声器来组成的音响系统,它是由杜比公司开发的,所以也叫做“杜比5.1声道”。在5.1声道系统里采用左前、右前、中、左后、右后五个声道输出声音,使人产生犹如身临音乐厅的感觉。五个声道相互独立,其中“.1”声道是专门设计的重低音声道。     

纯净音乐的秘密 安桥A-9755数码功放

时至今日,数码化已经向各个领域全面渗透。在以模拟信号为主的Hi-Fi领域．效率极高、音质纯净的数码功放也开始受到各音响厂商的关注。作为音响界赫赫有名的安桥（Onkyo）公司,近期就推出了一款2声道数码功放——A-9755。在很多人的印象中,提到安桥功放，会很自然地联想到安桥AV功放。     

打造床头音响系统——小试金河田JHT—503多媒体音箱

随着DVD驱动器和DVD片源的迅速普及,打造桌面影院所必须的5.1声道多媒体音箱逐渐成为厂商和消费者共同关注的焦点,以生产机箱和电源闻名的金河田也推出了一款5.1声道有源多媒体音箱——JHT-503。 这款JHT503音箱主要定位于普通家用级桌面影院系统,并且还推出了一个全新概念——家庭床头音响。很多人习惯于躺在床上看电视,而市场上常见的5.1音箱外形大多比较传统,放在卧室里不太和谐。而     

DVD新贵AllinoneVS5.1声道

春夏的 AV 市场,份属旺月,各品牌陆续有新产品登场。JVC 与 Philips 便分别推出了5.1声道的注目新机种,前者的 TH-A9以 All-in-one 套装 DVD 机作卖点;后者的 SACD 1000挟全球首部多声道 SACD 机的旗号作招徕。     

舞动的蓝——阿尔派新款奥德赛试音车鉴赏

阿尔派新款奥德赛试音车的系统,采用了汽车移动多媒体的概念作为设计的标准,在整个设计当中体现了多媒体系统强大的扩展性能。制作过程历经一个月。车上的多媒体系统连接有5.1声道的A/V系统,还支持连接及控制i-PodPhoto,并安装了PS-2游戏机,让驾乘者可以享受丰富多彩的娱乐节目。在这台试音车上,我们不但可以欣赏音乐,享受5.1声道移动影院带来的震撼效果,还可以让前、后座的乘客欣赏不同的DVD节目或玩游戏机。同时,我们还可以通过车上的音响欣赏存储在i-Pod里面的歌曲,i-Pod里面可以存储一万多首的MP3。此外,我们通过主机可以对i-Pod…     

新品

支持 5.1声道的声卡 ——升技 AU－ 10声卡 　　升技近期发表拥有 5.1声道的声卡 AU－ 10,该品通过了美国杜比 5.1声道认证。音效的发展从早期的单声道,到双声道,再到现在的 5.1声道 (2个主声道、 2个环绕、 1个中置和 1个重低音 Subwoofer)。由于现在市面提供的声卡多无法提供支持 5.1声道,也就是说即使买了 6只音箱,如果没有支持 5.1声道的声卡配合,也无法享受那身临其境的音响效果。 　　升技此次推出的 AU－ 10声卡,采用 ForteMedia推出的 FM801－ AU CODEC芯片,支持 5.1声道分离类比输出,通过软件 DVD影音光盘播放程…     

工薪族走进5.1声道时代

经常看大片、玩游戏的工薪一族,是不是还在用2.1声道的音箱呢?如果要真正体验和享受到各种3D游戏、电影带来的听觉震撼,还是要用一套5.1声道的音箱!面对5.1声道的诱惑你还能坐得住吗?当然阻碍大众进入5.1声道时代的主要原因还是价格,动辄上千、甚至几千元的价格让我们这些工薪族望而却步;其实由于板载5.1声卡的普及,对应的低价5.1音箱也开始大批流入市场,兜里“银子”不多?没关系,下面就来推荐几款让我们工薪族也能够接受的5.1声道音箱。小知识5.1声道是DolbyDigital(杜比数字)的音效输出标准,是由著名的杜比实验室制定的。5.1声道系统是…     

Only connect: teaching, technology and telesis

Abstract This paper describes an approach to the design of interactive multimedia materials being developed in a European Community project. The developmental process is seen as a dialogue between technologists and teachers. This dialogue is often problematic because of the differences in training, experience and culture between them. Conditions needed for fruitful dialogue are described and the generic model for learning design used in the project is explained.     

European Community policy and the market

Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven.     

一种自适应子融合集成多分类器方法

融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。     

Avoiding semantic and temporal gaps in developing software intensive systems

Development of software intensive systems (systems) in practice involves a series of self-contained phases for the lifecycle of a system. Semantic and temporal gaps, which occur among phases and among developer disciplines within and across phases, hinder the ongoing development of a system because of the interdependencies among phases and among disciplines. Such gaps are magnified among systems that are developed at different times by different development teams, which may limit reuse of artifacts of systems development and interoperability among the systems. This article discusses such gaps and a systems development process for avoiding them.     

Designing economic np control charts: A programmed simulation approach

This paper presents control charts models and the necessary simulation software for the location of economic values of the control parameters. The simulation program is written in FORTRAN, requires only 10K of main storage, and can run on most mini and micro computers. Two models are presented - one describes the process when it is operating at full capacity and the other when the process is operating under capacity. The models allow the product quality to deteriorate to a further level before an existing out-of-control state is detected, and they can also be used in situations where no prior knowledge exists of the out-of-control causes and the resulting proportion defectives.     

The development of robot art

Going through a few examples of robot artists who are recognized worldwide, we try to analyze the deepest meaning of what is called “robot art” and the related art field definition. We also try to highlight its well-marked borders, such as kinetic sculptures, kinetic art, cyber art, and cyberpunk. A brief excursion into the importance of the context, the message, and its semiotics is also provided, case by case, together with a few hints on the history of this discipline in the light of an artistic perspective. Therefore, the aim of this article is to try to summarize the main characteristics that might classify robot art as a unique and innovative discipline, and to track down some of the principles by which a robotic artifact can or cannot be considered an art piece in terms of social, cultural, and strictly artistic interest. This work was presented in part at the 13th International Symposium on Artificial Life and Robotics, Oita, Japan, January 31–February 2, 2008     

Explanation and prediction: an architecture for default and abductive reasoning

Although there are many arguments that logic is an appropriate tool for artificial intelligence, there has been a perceived problem with the monotonicity of classical logic. This paper elaborates on the idea that reasoning should be viewed as theory formation where logic tells us the consequences of our assumptions. The two activities of predicting what is expected to be true and explaining observations are considered in a simple theory formation framework. Properties of each activity are discussed, along with a number of proposals as to what should be predicted or accepted as reasonable explanations. An architecture is proposed to combine explanation and prediction into one coherent framework. Algorithms used to implement the system as well as examples from a running implementation are given.     

Three Process Perspectives: Organizations, Teams, and People

This paper provides the author's personal views and perspectives on software process improvement. Starting with his first work on technology assessment in IBM over 20 years ago, Watts Humphrey describes the process improvement work he has been directly involved in. This includes the development of the early process assessment methods, the original design of the CMM, and the introduction of the Personal Software Process (PSP)^SM and Team Software Process (TSP){^SM}. In addition to describing the original motivation for this work, the author also reviews many of the problems he and his associates encountered and why they solved them the way they did. He also comments on the outstanding issues and likely directions for future work. Finally, this work has built on the experiences and contributions of many people. Mr. Humphrey only describes work that he was personally involved in and he names many of the key contributors. However, so many people have been involved in this work that a full list of the important participants would be impractical.     

基于复小波噪声方差显著修正的SAR图像去噪

提出了一种基于复小波域统计建模与噪声方差估计显著性修正相结合的合成孔径雷达(Synthetic Aperture Radar,SAR)图像斑点噪声滤波方法。该方法首先通过对数变换将乘性噪声模型转化为加性噪声模型,然后对变换后的图像进行双树复小波变换(Dualtree Complex Wavelet Transform,DCWT),并对复数小波系数的统计分布进行建模。在此先验分布的基础上,通过运用贝叶斯估计方法从含噪系数中恢复原始系数,达到滤除噪声的目的。实验结果表明该方法在去除噪声的同时保留了图像的细节信息,取得了很好的降噪效果。     

How do children do mathematics with LOGO?

Abstract  This paper considers some results of a study designed to investigate the kinds of mathematical activity undertaken by children (aged between 8 and 11) as they learned to program in LOGO. A model of learning modes is proposed, which attempts to describe the ways in which children used and acquired understanding of the programming/mathematical concepts involved. The remainder of the paper is concerned with discussing the validity and limitations of the model, and its implications for further research and curriculum development.