The wireless revolution

Current demand for and recent developments in wireless communication are described. Funding for wireless worldwide is examined. Tools and techniques used to characterize radio propagation are discussed, and some research results are presented     

Tracking in molecular bioimaging

This paper aims to simulate the application of more advanced computer vision techniques to tracking in biological molecular imaging by surveying the literature and sketching the current state of affairs in the field for a signal and image processing audience. After describing the basic principles of visualizing molecular dynamics in living cells and giving some examples of biological molecular dynamics studies, the paper summarizes the problems and limitations intrinsic to imaging at this scale. The paper then discusses the main ingredients of the commonly used tracking paradigm and subsequently reconsider its competence by comparing it to certain aspects of visual motion perception in human beings, keeping in mind the complexity and variability of biological image data. Finally, it summarizes the main points of attention for future research and the challenges that lie ahead.     

The revolution in systems engineering

The process of engineering systems on a chip will transform relationships among hardware, software, and mechanical designers. Various issues in systems engineering are discussed as is the role of systems engineering as a process. Co-design objectives and the state of co-design in electronic design automation are then considered as are virtual system prototypes     

The revolution will be prosthetized

It?s October at Duke University, in Durham, N.C., and Jonathan Kuniholm is playing ?air guitar hero,? a variation on Guitar Hero, the Nintendo Wii game that lets you try to keep up with real musicians using a vaguely guitarlike controller. But the engineer is playing without a guitar. More to the point, he?s playing without his right hand, having lost it in Iraq in 2005. Instead he works the controller by contracting the muscles in his forearm, creating electrical impulses that electrodes then feed into the game. After about an hour he beats the high score set by Robert Armiger, a two?armed Johns Hopkins University engineer who modified Guitar Hero to train amputees to use their new prostheses.     

台式电源测试的革命

自爱迪生和特斯拉的时代开始,电源在电气工程中就已是不可或缺的,以至于曾经有段时间设计人员理所当然地将电源作为设计过程的最后一项任务.现如今情况却发生了变化.精确控制和高效利用能源实际上已经成为今天设计每一项商用和消费系统的关键.因为功率应用中的石油成本前所未有的高,所以能源也就是钱.     

双金属ZnAu纳米团簇的光学性质及生物成像应用

为了优化Au纳米团簇(nanoclusters,NCs)的光 学性能,拓宽它的应用领域,利用原子掺杂法合成 了超稳定的发光双金属ZnAu NCs。通过对紫外-可见吸收光谱、发射光谱、红外光谱、荧光 寿命等的测试 和分析,研究了合成的ZnAu NCs的光学特性,讨论了Zn原子掺杂对Au NCs发光性能的影响, 并且借 助透射电子显微镜和质谱等表征手段,分析了这种光学材料的结构性质。最后,通过细胞毒 性评估以及细 胞成像实验探究了其在生物医学上的应用。研究结果表明,与未掺杂原子的Au NCs相比,掺 杂Zn原子的 ZnAu NCs的荧光强度增强了3倍左右,荧光寿命也从6.73 μs延长到 7.26 μs。此外,结合 质谱确定了超小 的ZnAu NCs是分子量位于5.0 kDa－5.8 kDa之 间的复合物团簇。这种发光纳米材料所表现出的良好的光稳 定性和低细胞毒性,使其在生物成像领域具有潜在的应用价值。同时,Zn原子的掺杂提升了 Au NCs的光学性能,为其在其它领域的广泛应用提供了更大的可能性。     

The ITU's role in the restructuring revolution

The ITU recognizes a twofold mission: to monitor regulatory policy changes and technological developments to be in a position to advise members; and to link restructuring changes to overall basic telecommunication development needs. The fundamental goal of the international community in this sector is to achieve universal access to basic telecommunications services. In this context, restructuring is but one component, although the global challenge is to work together to ensure that the restructuring revolution paves the way to filling the development gap. It is readily admitted that new technologies such as mobile satellite systems enable developing countries to leapfrog their infrastructure problems, and that governments recognize the potential benefits of these new technologies and the need to reform regulations in order to facilitate the introduction of these services     

Nano revolution

All over the world, interdisciplinary teams are uncovering new engineering truths to support the statement made in 1959 by US physicist Richard Feynman that "the principles of physics do not speak against the possibility of manoeuvring things atom by atom". Nanotechnology is based on the ability to create and manipulate materials, devices and systems at the nanometre scale; that is, one billionth of a metre (10/sup -9/). Another definition comes from considering nature's art of 'building up', by self-assembling atoms and molecules into useful structures. This proves particularly useful in the field of semiconductors, where designers are running out of things they can do with traditional lithographic techniques. Typically, semiconductor devices are grown from silicon on top of which various materials are deposited and then etched away until the needed circuit remains. But photolithography is reaching its physical limits, since etching features smaller than the wavelength of light becomes increasingly challenging. Hence the interest in building up, instead of etching down.     

Inkjet revolution

The use of inkjet technology for the application of thin-film-transistor liquid-crystal display manufacturing.     

The quantization noise spectrum of a sinusoid in colored noise

The power density spectrum (PDS) of analog-to-digital (A/D) quantization noise is obtained for an input signal consisting of sinusoid and colored noise. While this type of quantization noise is often assumed to be uncorrelated or white, it may not be when the input signal occupies a relatively small number of quantization levels. Equations describing the PDS are derived and presented for combinations of deterministic and random A/D converter inputs     

Efficient generation of colored noise

A new technique is presented for efficiently generating colored noise. Instead of discarding initial samples to account for the transient, the approach proposed here is to set the initial conditions of the filter so that the output process will be stationary. It is shown that the Levinson-Durbin algorithm provides an efficient means for determining these initial conditions.     

Managing product design: The next industrial revolution

Few subjects in engineering are as important and as neglected as design. The author appeals for a revolution in managing product design. Although the supporting evidence is not as well researched as one would like, there seems little doubt that product design and its management are often grey areas in industry where good management practice is under-used. Conversely, the benefits on offer from adopting such practices are worthwhile and provide an excellent opportunity to gain an edge on global competition. But, if we do too little too late, we face the threat that others will gain an equivalent edge over us. Having initiated revolutions in management of manufacturing. quality and marketing, industrial managers should now embark on a fourth revolution-this time in the management of product design and development     

The other communications revolution [TETRA standard]

As GSM continues its advance through the global market for mobile telephones, the TETRA (Trans European Trunked Radio) standard is set to launch a comparable revolution in private mobile radio. The author discusses what TETRA is and its prospects for the future     

基于最小割的彩色点云分割

提出一种基于最小割的彩色点云分割算法,首先找到彩色点云中每个点的临近点,然后与父点连接,再找到距离最近的2个块并连接,重复连接距离最小的2个块,直到只剩1个块,从而生成1张点云图.根据2点之间的欧氏距离和颜色空间距离设置2点连线的权值,当选择待分割点后根据设定的阈值大小和分割范围,查找被选点分割范围内的所有符合条件的点,然后通过区域生长算法对符合条件的点进行生长,进而得到颜色相近的三维连通区域.实验证明所提方法可行,可有效解决三维分割中连通性的问题.     

The quality control revolution: new opportunities for corporatecommunication

Specific quality assurance techniques used in corporate environments that help communication professionals meet the communication challenges of today's quality revolution are discussed. These quality control techniques stress the necessity of identifying the customer's needs and ensuring that products meet those needs. It is shown that the quality control process is similar to the communicator's concern for the audience, for ensuring that communications address the needs of the audience