世强电讯获评南京智达康2011年度优秀供应商

2012年1月，智达康无线通信科技股份有限公司召开首届供应商大会。通过对各供应商的产品品质、交期、价格、服务等方面的综合考核，智达康最终评选出2011年度优秀供应商并给予表彰，同时，也从产品品质和销售前景的角度出发，对供应商们提出新的要求和期望。凭借优良的产品品质以及在通信领域近20年的技术支持服务经验，     

某些功率MOSFET实行配给制一年来半导体业第一次出现配给制

由于某些功率半导体极度短缺,一些MOSFET已实行配给制,这是12个月以来半导体业的第一次配给制。 iSuppli公司认为,实行配给制标志着产品供应不足, 也就是说供应商们无法满足客户的需求。在配给制的情况下,供应商们分配给客户有限的器件而不是全部满足客户的定单要求。这样的情况要比经常出现的供需失衡严重的多。     

在DFX中运用DPMO降低PCB的组装成本

本文介绍了制造商们如何在应用DFx工具时利用DPMO数据改善质量和降低成本的商业例子。利用DPMO数据可以精确地预测未来产品的缺陷分布、提供新产品报价、设计更有效的测试方法、预测产量，而且可以评估装配质量水平。为了确保制造中低成本、高合格产品的生产，制造商们可以在设计阶段运用DFx工具解决各种难题，通过进行量化和按重要性优先排序方法更好地满足客户要求。高效的DFx方法可以促进了OEMs和EMS供应商之间商业关系的发展，EMS供应商们可以把能够降低PCB安装成本的DFx服务卖给OEM客户。这样，DFx服务可以成为区别竞争对手的利润中心。本文给出一个EMS供应商应用DFx的实例。     

元器件供应商的困难时期

能源和原材料价格上涨对元器件供应商造成严重影响。元器件价格在低位徘徊,但由于客户需求疲软,供货商要想提高价格以补偿损失是十分困难的。元器件供应商只能继续自行消化大部份原材料及物流成本上涨的不利因素,因此,这个夏季对于元器件供应商们来说将是一个困难的时期。     

地面气象观测记录年报表制作与审核技术

本文从台站制作地面气象记录年报表（以下简称“年报”）的技术需求出发，详细地讲解了年报的制作过程，从省级质量控制的角度出发，阐述了如何完善地对年报进行数据审核。一方面，台站每年才制作一次年报，且制作和预审人员变动频繁，在年报方面欠缺经验积累；另一方面，业务技术规定对年报制作的说明比较笼统，可操作性较差；第三，采取的制作方法和步骤不完善，缺乏严密性。因此，导致了年报表的质量一直得不到保证。本文根据从台站制作年报的技术需求出发，详细地讲解了年报的制作过程，并从省级质量控制的角度出发，阐述了如何完善地对年报进行数据审核，而且根据自己多年从事报表审核的工作经验，分析了年报表中常见的错情，总结出了比较详细的台站制作年报的方法和较为完善的审核步骤，供大家共同探讨。     

TOP—DOWN设计方法在系统设计中的应用

当系统设计师为控制当今的ASIC、PCB板电路及子系统设计的复杂性而艰苦劳作时,EDA供应商们则正在竭力推销TOP-DOWN设计方法。然而无沦设计师还是供应商都十分清楚,要想用同一尺码的工具去适用于所有的解决方案是不可能的。     

激光高效加工支撑太阳能技术蓝图

快速成长的光伏产业需要设备供应商们提供许多解决方案,包括提高产出、成品率和降低拥有成本。激光的应用在这些方面起着越来越重要的作用。     

高性能网络改变远程通讯获利模式

一体化服务呼唤高性能网络 创新加快了远程通讯的发展。仅在数年前,用户还对由不同供应商提供不同业务的方式表示满意,例如：家庭电话服务由本地电话公司提供,电视频道接入服务则来自另一家公司。这些供应商们都建有各自的网络,根据自己的特长为用户提供特定服务,并以细分服务为傲。     

元器件市场：适者生存

正如此前所料，1月份的元器件市场非常萧条。但是，很多业内人士对金融危机的广度和深度认识不足。如今，对于大多数元器件供应商，以及电子行业相关企业，“能够生存下去”己经成为他们的主要策略。在当前这种不确定的经济环境下，供应商们很难预测什么时候才能重新赢利。     

Total Solution给了我们什么?

但凡国际领先的芯片供应商来中国推销其产品时,都不会忘记一个关键词-Total Solution-中国的OEM们一旦采用了这样的Solution     

Building a in a flash supercomputer

A flash mob is a group of strangers, organized over the Internet, that comes together briefly, acts out a predetermined scenario-often something as simple as clapping for 30 seconds-and then disperses. A supercomputer is a very fast and powerful computer that outperforms most mainframes, at a cost, typically, of millions of dollars. Can a flash mob build a supercomputer? It can sure try, and so it did on 3 April at the University of San Francisco's Koret athletic center. The goal was to run the Linpack benchmark, a standard method of assessing the speed of supercomputers, to achieve a speed of at least 403 gigaflops (billion floating point operations per second). This would be fast enough to earn the system a place on the list of the world's fastest 500 supercomputers. The goal was not reached. The group reached just 180 gigaflops before it was time to pack up the computers and go home. However, even though the San Francisco effort fell short of speed goal, it did ignite imaginations.     

On a wing and a prayer

Aircraft giants Boeing and Airbus are pinning their hopes on very different visions of how air travel will evolve in the coming decade.     

Cooperative control of a human and a robot manipulator for positioning a cart on a frictionless plane

Robots may be expected to execute some tasks in cooperation with humans. Control systems for such robots should be appropriate to adapt to human characteristics in order to successfully accomplish the task. Pushing a cart on a frictionless plane in cooperation with a human is a basic example to such a task. To control the motion of an object from one point to another on a frictionless plane is impossible by only pushing in one direction without supporting it in the opposite direction, since as soon as the force is applied, the object will move without stopping its motion. In this paper, compliant cooperative positioning of a cart on a frictionless plane by a human and a manipulator is proposed using impedance control method with the parameters obtained from human–human cooperation.     

Analysis of a coaxial-to-waveguide adaptor including a discendedprobe and a tuning post

A field matching analysis of a coaxial-to-waveguide adaptor incorporating a disc-ended probe and a tuning post is presented. In this analysis, the tuning post is considered as a short-circuited second probe. A computer algorithm for calculating the input impedance of this structure is developed. This algorithm is used to investigate and improve the operation of a commercially available coaxial-to-waveguide adaptor     

Transmission-Line Properties of a Strip on a Dielectric Sheet on a Plane

The subject is a strip Iine formed of a strip and a parallel ground plane separated by a dielectric sheet (commonly termed "microstrip"). Building on the author's earlier papers all the significant properties are formulated in explicit form for practical applications. This may mean synthesis and/or analysis. Each formula is a close approximation for all shape ratios, obtained by a gradual transition between theoretical forms for the extremes of narrow and wide strips. The effect of thickness is formulated to a second-order approximation. Then the result is subjected to numerical differentiation for simple evaluation of the magnetic-loss power factor from the skin depth. The transition formulas are tested against derived formulas for overlapping narrow and wide ranges of shape. Some of these formulas are restated from the earlier derivations and others are derived herein. The latter include the second-order approximation for a narrow thin strip, and a close approximation for a narrow or wide square cross section in comparison with a circular cross section. Graphs are given for practical purposes, showing the wave resistance and magnetic loss for a wide range of shape and dielectric. For numerical reading, the formulas are suited for programming on a digital pocket calculator.     

基于智能手机压电基片上微液滴位置分析章

为了降低微流分析成本,该文提出了基于智能手机检测压电基片上目标微液滴方法,并开发出相应的应用软件,通过分析微液滴颜色信息和几何信息定位目标微液滴位置,结合分析时间获取微液滴输运速度。为验证提出方法的正确性,以5 μL黑色墨水溶液微液滴为研究对象,进行压电基片上微液滴识别和位置分析实验。结果表明,该文所提方法和开发的应用软件可识别和定位压电基片上微液滴,在功率为27.5 dBm时,第2~10 s段内微液滴输运速度为0.416 mm/s。     

构建完整工业ADC接口的微控制器和调制器

设计师们通常使用0mA～20mA和0V～10V的隔离输入作为工业应用控制的信号.由隔离电源、Analog Devices AD7400调制器内置隔离及TexasInstruments MSP430微控制器共同为工业设计师要求的一种完整、隔离且可靠的模拟信号接口创建一种设计.     

The measurement of a large antenna using a spacecraft as a receiver

Two computational methods for obtaining the gain pattern of a large antenna using power levels recorded by a spacecraft are developed from the transmission equation. Nominally, the large antenna is linearly polarized while the spacecraft's receiving antennas are circularly polarized. Since the spacecraft has no attitude control system, the orientation of the receiving antennas is not known a priori nor its orientation the same from orbit to orbit. The first method relies on an independent spacecraft attitude determination system to furnish the orientation of the receiving antennas. It combines this information with receiving-antenna gain measurements to give the power level of the incident radiation. Losses due to polarization mismatch are taken into account, but polarization loss factors are not actually computed. The second method relates simultaneous measurements made by separate channels with separate receiving antennas. By solving a system of equations numerically, one can determine the direction of the incident radiation as well as its power level. This alleviates the need for an attitude determination system. These methods originated in the operations of the spacecraft NUSAT1 (northern Utah Satellite)