一般形式的Lupas-Baskakov积分算子

本文引入一般形式的Lupas-Baskakov积分算子,研究它的同时逼近,给出精确的逼近阶,建立加权和一致的逼近等价定理.     

一种大幅度连续可调的低压电源

本文采用可控硅调压原理设计了一种大幅度连续可调的低压电源     

花粉管通道法研究(Ⅰ)——影响试验颖花结实率的几个因素

本文研究了利用花粉管通道法向水稻转移外源基因的实验中,影响试验颖花结实率的几个因素,指出了获得较高的结实率所需的温度和相对湿度。     

浅谈智能业务在NGN网络中的应用

本文在简单介绍智能网和NGN网络的组网原理的基础上,讨论了智能网与NGN网络的互通,并重点研究论述了智能业务的特点及在NGN网络上开发传统智能业务的方法,业务模式和业务特点。     

片上集成自动可调谐非对称带通滤波器

提出了具有3阶高通、2阶低通的带有自动调谐系统的有源电阻电容非对称带通滤波器结构.带通滤波器的中心频率为4.055 MHz,带宽为2.63 MHz.源阻抗为50Ω时,滤波器带内3阶交调量为18.489 dB.m.滤波器输入参考噪声为47.91×10-6Vrms(均方根电压).滤波器采用基于二进制搜索算法(BSA)的调谐方案,其调谐精度为(-1.65%,2.66%).调谐电路的芯片面积为0.282 mm×0.204 mm,不到主滤波器面积的1/5.调谐系统完成调谐功能后会自动关闭,降低了功耗和对主滤波器的串扰.在1.8 V电源电压下,滤波器消耗电流为1.96 mA.该滤波器已在IBM 0.18μm标准互补金属氧化物半导体(CMOS)工艺线流片成功.     

A novel bit-error indicating scheme using only one judge threshold

A novel all-optical bit-error indicating scheme based on self-phase modulation and band-pass filtering is proposed. In this scheme, the amplified original bit stream propagates through a high-nonlinear fiber where self-phase modulation occurs, and then passes through a band-pass filter to be converted to a bit-error indicating signal. In the bit-error indicating signal, the error bit has the highest peak power, and the ＂1＂ and ＂0＂ bits have lower ones. At the same time, the bit-error indicating signal is synchronous with the delayed original bit stream. Therefore, the position of the error bit in the original bit stream can be identified by setting only one judge threshold in the bit error indicating signal. The performance of this scheme has been demonstrated for an 80 Gb/s bit-stream with return-to-zero format by simulation. The results show that the proposed scheme can be used for the all-optical bit-error indicating of the super high bit-rate systems with the return-to-zero format.