评价Spice模型不能仅考虑直流与交流性能

在使用Spice以前，评价其直流与交流性能是成功的关键。但模型评价不应仅限于此，设计者还应了解，当有源器件模型在非线性区域工作时的执行情况以及有怎样的关键交流指标。这些参数很难或不可能通过数据资料来验证，因为数据资料并未给出在器件通往电源轨的放大器输出级非线性区上工作时的指标。     

Ultra large scale static rams

Using a patented defect avoidance technique, high yield production of high density SRAM devices (ULSI SRAMs) can be achieved one process generation ahead of the rest of the industry. Production wafer yields as high as 100% and long-term average yields above 80% are reported on Inova's monolithic, 1.2, 320 square mm, one megabit SRAM demonstrating a practical method of achieving wafer scale integration. A yield model is presented and used to determine the optimized architecture and redundancy scheme for Inova's four megabit SRAM and to predict yield as a function of defect density. Achievement of a working 8M-bit experimental device using a 1.2 process is also reported.     

Improving group decision making: a fuzzy GSS approach

Group decision-making methods have been developed extensively, but their adaptation for use in organizations has been problematic. According to Arrow's (1963) Impossibility theorem, one conceivable reason is that a group decision outcome could never satisfy all decision makers' individual preferences. In order to accommodate individual decision maker's preferences in a group decision-making task, this correspondence presents a fuzzy multiperson multicriteria decision making (MMCDM) model and a structured group decision-making process. The fuzzy MMCDM model includes fuzzy individual preference generation and group preference aggregation. The structured decision-making process keeps the group interaction on track, so that the fuzzy MMCDM model can be effectively applied to the group decision-making task. Based on the proposed model and the decision-making process, a fuzzy group support system (GSS) has been developed and applied to a group assessment task. An empirical study was conducted and the experiment results showed that use of the fuzzy GSS enhanced individual understanding, consensus, and satisfaction of the group decision outcome     

Delayed luminescence in a molecularly doped polymer (TAPC in polycarbonate)

Decay of the delayed luminescence of 1,1-bis(di-4-tolylaminophenyl)cyclohexane, both doped into a polycarbonate binder and matrix-isolated in an MTHF glass, has been studied upon excitation with the 308 nm line of an excimer laser. Time-resolved emission spectra have also been recorded. In the early time regime, 30 ns < t < 10 μs, the decay of the emission, identified as delayed fluorescence rather than phosphorescence, follows a power-law characteristic of geminate pair recombination in a disordered medium. Singlet–singlet excitation fusion is considered to be the main pathway for geminate pair formation. Fusion of triplet excitations becomes important for e–h pair formation at long times only (10 μs < t < 10 ms). The rate of triplet–triplet encounters carries a time dependence characteristic of the random walk of excitations in a disordered solid.     

电场感知技术应用

拉斯维加斯的演出节目和客车的安全系统会有什么相关之处呢?如果看了“Penn&Teller”的魔术表演,你就会产生一些灵感了。Elesys公司的PhilRittmueller就是这样--Elesys公司以前曾是NEC的一部分,Phil的主意可以用于汽车安全气囊的触发控制,以避免对幼龄乘客可能造成的严重伤害甚至死亡。想象一下,当“Penn&Teller”的PennGillette坐在“心灵座椅“之中—那是一把综合了光学和电子学的旧式木椅—指挥着一个管弦乐队。Penn仅仅通过身体的动作,就能分别让各式各样的乐器表演起来。他的动作是非常夸张的,超过了真正乐队的指挥。当他跺脚的…     

Characterizing Mood Management as Need Satisfaction: The Effects of Intrinsic Needs on Selective Exposure and Mood Repair

This study attempted to (a) extend traditional mood management theory research by investigating the influence of the intrinsic needs for competence and autonomy on selective exposure to video games and (b) test the influence of satisfying these needs on resultant mood repair. An experiment varied satisfaction of competence and autonomy needs using false feedback. Subjects then selected media that varied in level of user demand. Measures of need satisfaction were taken before and after media selection. Results demonstrated that (a) thwarted intrinsic needs significantly predict the choice of video games with different levels of user demand and (b) the satisfaction of these needs predicts enjoyment. Findings indicate that mood management can result from mood repair through need satisfaction.     

高性能射频调制器促成多载波通信发送器设计

引言 现有的蜂窝基站大多采用超外差结构发送或接收射频信号.这种结构需要两次变频或更多的上、下变频级、中间滤波和模拟信号处理.图1的上半部分给出了一个两级转换蜂窝基站的典型超外差发送框图,很多此类发送器已经被应用在单载波系统.因为多载波发送器是从单载波发送器复制得到的,所以引入了更多的系统硬件.为了努力降低发送器的成本,许多系统设计者开始转向多载波发送器和简单的直接变换射频结构.