3f多路光电混合实时模式识别系统

介绍一种新型的3f多路光电混合实时模式识别系统。采用一平面微透镜列阵器件得到输入物体的多路傅里叶变换,匹配滤波器是构造在石英基片上的石英BPOF。该系统实现输入图像与存储的多个参考图像的实时并行相关。     

完全搜索块匹配运动补偿算法光电混合系统

基于声光相关器提出了种能实时实现视频图象压缩中完全搜索块匹配运动补偿算法的光电混合系统，与全数字电路相比，该系统具有足够的带宽，能并行处理大量数据，并且电路较简单，可降低功耗、成本及结构复杂性，还讨论了该系统的适用范围。     

Bi4Ti3O12 modified low voltage ZnO-based varistors: microstructure, electrical properties and aging characteristics

The effects of Bi₄Ti₃O₁₂ addition on the microstructure, electrical properties and aging characteristics of ZnO-based varistors were investigated. The addition of Bi₄Ti₃O₁₂ can reduce the formation of Zn₂TiO₄ spinel phase and promote the growth of ZnO grain. Bi₄Ti₃O₁₂ doped ZnO-based varistors sintered at 1,130 °C possessed excellent performance of I _L = 2.9 μA, E _1mA = 29.7 V/mm, α = 30.2, and good surge absorption capability with %△E _1mA = ?3.5 % for 500 A 8/20 μs impulse current. In addition, the varistors exhibited the most stable accelerated aging characteristics with %△E _1mA = ?0.3 % for DC accelerated aging stress of 125 °C/7 h. These results revealed that Bi₄Ti₃O₁₂ addition is highly beneficial to attain enhanced varistor properties of ZnO ceramics.     

From Monomer Sequence to Charge Mobility in Semiconductor Polymers via Model Reduction

A model reduction scheme for polymer semiconductors is presented that can be utilized to compute intra-chain charge-carrier mobility from the monomer sequence. The reduced model can be used in conjunction with any quantum dynamics approach, but it is explored here assuming that transport takes place through incoherent hopping events between states of different degrees of delocalization. The procedure is illustrated by considering 28 realistic polymers for which a quantitative correlation is established between charge localization characteristics and charge mobility. The data set helps in establishing plausible ranges for all the microscopic parameters of the model and it can therefore be used to determine the maximum plausible improvement in mobility. The reduced model is also used to provide some insight on the observation that the highest mobility polymers do not have very broad valence bands: there is indeed a range of the inter-monomer coupling for which this parameter has little effect on the mobility.