A 26-Gb/s CMOS optical receiver with a reference-less CDR in 65-nm CMOS

This paper presents a 26-Gb/s CMOS optical receiver that is fabricated in 65-nm technology. It consists of a triple-inductive transimpedance amplifier (TIA), direct current (DC) offset cancellation circuits, 3-stage gm-TIA variable-gain amplifiers (VGA), and a reference-less clock and data recovery (CDR) circuit with built-in equalization technique. The TIA/VGA front-end measurement results demonstrate 72-dBΩ transimpedance gain, 20.4-GHz −3-dB bandwidth, and 12-dB DC gain tuning range. The measurements of the VGA’s resistive networks also demonstrate its efficient capability of overcoming the voltage and temperature variations. The CDR adopts a full-rate topology with 12-dB imbedded equalization tuning range. Optical measurements of this chipset achieve a 10⁻¹² BER at 26 Gb/s for a 2¹⁵−1 PRBS input with a −7.3-dBm input sensitivity. The measurement results with a 10-dB @ 13 GHz attenuator also demonstrate the effectiveness of the gain tuning capability and the built-in equalization. The entire system consumes 140 mW from a 1/1.2-V supply.     

Sequential Inverse Optimal Control of Discrete-Time Systems

This paper presents a novel sequential inverse optimal control (SIOC) method for discrete-time systems, which calculates the unknown weight vectors of the cost function in real time using the input and output of an optimally controlled discrete-time system. The proposed method overcomes the limitations of previous approaches by eliminating the need for the invertible Jacobian assumption. It calculates the possible-solution spaces and their intersections sequentially until the dimension of the intersection space decreases to one. The remaining one-dimensional vector of the possible-solution space’s intersection represents the SIOC solution. The paper presents clear conditions for convergence and addresses the issue of noisy data by clarifying the conditions for the singular values of the matrices that relate to the possible-solution space. The effectiveness of the proposed method is demonstrated through simulation results.

     

高阶系统PID参数降阶设计

在二阶系统PID参数设计理论的基础上,提出对具有\     

Fe-Ni-P非晶合金的电沉积

研究了电沉积法制备FeNiP非晶合金的工艺条件。以抗坏血酸作为络合剂,选择了合适的电镀液,研究溶液的pH、温度和电流密度对电镀层的影响。     

电镀Ni—P非晶合金的研制

本文研究了在电沉积过程中阴极超电位与形成非晶态的关系。实验结果表明,在阴极极化曲线的平台处易产生非晶态。还讨论了电沉积条件对形成非晶态镀层的影响。在较高的镀液温度,低的pH值及适当的电流密度的条件下,镀液中H₃Po₃含量达到一定的比值,镀层易形成非晶态。镀液中H₃PO₃含量越高,镀层中的磷含量越高,当磷含量超过9%时形成非晶态,且镀层的耐蚀性随其磷含量的增加而增强。热处理温度对镀层的影响也做了检验。     

我国现代高科技军事营区规划探索--东风航天城10号区规划设计

从分析我国军事高科技发展现状入手,以东风航天城规划为例,阐述建设高科技军事营区的必要性和方法。     

尿素装置闪蒸汽冷凝器腐蚀分析及对策

介绍闪蒸汽冷凝器的性能结构及在工艺系统中的作用,根据闪蒸汽冷凝器使用过程中发生的问题,分析腐蚀产生的原因,并提出采取的对策及建议。     

A new model of shear creep and its experimental verification

Mechanics of Time-Dependent Materials - Creep exerts a significant role in rock engineering safety. In engineering practice, it is helpful to develop a mathematical model representing rock creep...     

Investigation on the full Mullins effect using time-dependent hyperelastic model with energy dissipation for rubber antivibration applications

Mechanics of Time-Dependent Materials - Despite being investigated for many years, the Mullins effect is considered a major obstacle in understanding the behavior of rubber, especially in...     

一种结合时空上下文的在线卷积网络跟踪算法

基于卷积神经网络提取抽象特征缺乏时空信息的问题,结合时空上下文模型作为卷积神经网络的各阶滤波器,提出一种在线卷积神经网络的视觉跟踪算法.首先对初始目标进行归一化处理并提取目标置信图,跟踪过程中结合时空信息更新得到时空上下文模型,第1层使用更新后的模型对输入进行卷积,并对卷积结果进行滑动窗口取片,第2层再使用时空模型分别对取片结果进行卷积,提取目标简单抽象特征,然后叠加简单层的卷积结果得到目标的深层次表达,最后结合粒子滤波跟踪框架实现目标跟踪.实验表明:结合时空上下文模型的在线卷积网络结构提取的深度抽象特征,保留相关时空信息,提高复杂背景下的跟踪效率.