导弹姿态控制系统中校正网络的改进

校正网络是导弹姿态控制系统中变换放大器的重要组成部分.根据某导弹改型前后校正网络传递函数的变化,分析了网络变化的原因,介绍了陷波器消除结构谐振的补偿原理,并给出了此类有源陷波器的设计方法.     

One-Component Artificial Gustatory System Based on Hydrogen-Bond Organic Framework for Discrimination of Versatile Analytes

Hydrogen-bond organic frameworks (HOFs) with excellent structural and luminescent properties have emerged as a promising material for the construction of fluorescence sensors. However, designing a facile, universal and high throughput sensor with multiplex detection capacity still remains challenging. Herein, a one-component sensor array is constructed that mimics natural gustatory system for accurate and high-throughput discrimination and identification of versatile analytes. HOF as a single sensing element greatly simplifies the probe preparation in sensor array and detection procedure. Metal ions, proteins and bacteria as the model targets are rapid and accurately discriminated, presenting the universality of the system. Particularly, the system is successfully used for the classification of antibiotic mechanisms. The study expands the application scope of HOFs and provides a facile and universal system for sensing applications.     

臂式输弹机的结构设计和仿真分析

介绍了臂式输弹机构的结构和动作原理,并以122 mm口径弹丸的输送为例,根据输弹机构的结构及动作原理,建立了输弹机构的虚拟样机.通过分析计算和动力学仿真及对仿真结果的分析,得出臂式输弹机构动作稳定、在强制输弹行程相同及强制输弹行程结束时弹丸获得相同速度的前提下,与推弹力为定值时相比,具有完成推弹动作的时间短和更有利于弹丸加速的结论.     

Differential bidirectional transceiver for on-chip long wires

This work presents a differential bidirectional transceiver (DBT) for on-chip long wires. To enhance operating speed and reduce power consumption, the voltage swing on the wire is reduced using current-mode scheme. Consequently, our design performs higher data rate when wire length is extended. Moreover, adoption of differential scheme with a moderate tradeoff of area effectively lowers power supply noise and common mode noise. The receiver adopts four input differential pairs along with current summation circuit to evaluate small signal differences of every that state resulted from transmitting different data. Simulations using 0.18-μm device model indicates that the total input to output delay over a 5 mm long wire is 0.96 ns, with a power consumption of 8.724 mW at a speed of 1.2 Gbps and a maximum achievable data rate of 1.5 Gbps. A test chip is realized and successfully verifies the performance of the transceiver.     

生物转化法生产L－苹果酸的研究（Ⅰ）──富马酸酶产生菌株的筛选

经对３０余份采自不同地区土样的菌种筛选，得到２０株可将富马酸转化为Ｌ－苹果酸的菌株，其中尤以Ｇ（０４）株的转化活力最高。对该菌株的较佳转化条件研究表明：较适的转化温度为３７℃，基质初始ｐＨ值为７．５。菌体经０．２％胆酸３８℃处理２０ｈ，可使富马酸转化率较未处理的对照提高７４．３％。另外，采用０．２％胆酸或０．０６％ＴＰＣ处理菌体，均可在转化反应中抑制琥珀酸副产物的形成。     

Fabrication and Electromagnetic Properties of Conjugated NH<Subscript>2</Subscript>-CuPc@Fe<Subscript>3</Subscript>O<Subscript>4</Subscript>

Conjugated amino-phthalocyanine copper containing carboxyl groups/magnetite (NH₂-CuPc@Fe₃O₄) has been fabricated from FeCl₃·6H₂O and NH₂-CuPc via a simple solvothermal method and its electromagnetic properties investigated. Scanning electron microscopy and transmission electron microscopy revealed that the NH₂-CuPc@Fe₃O₄ was a waxberry-like nanomaterial with NH₂-CuPc molecules effectively embedded in the interior of Fe₃O₄ particles in the form of beads. Introduction of NH₂-CuPc effectively improved the complementarity between the dielectric and magnetic losses of the system, resulting in excellent electromagnetic performance. The minimum reflection loss of the as-prepared composite reached ?33.4 dB at 7.0 GHz for coating layer thickness of 4.0 mm and bandwidth below ?10.0 dB (90% absorption) of up to 3.8 GHz. These results indicate that introduction of NH₂-CuPc results in a composite with potential for use as an electromagnetic microwave absorption material.     

一种生成对抗网络用于图像修复的方法

近年来基于深度学习的图像修复方法相比于传统方法,表现出明显优势,前者能更好的生成视觉上合理的图像结构和纹理.但现有的标准卷积神经网络方法,通常会造成颜色差异过大和图像纹理缺失与失真的问题.本文提出了一种新型图像修复深度网络模型,该模型由两个相互独立的生成对抗式网络模块组成.其中,图像修复网络模块旨在解决图像缺失区域的修复问题,其生成器基于部分卷积网络;图像优化网络模块旨在解决修复后图像存在局部色差的问题,其生成器基于深度残差网络.通过两个网络模块的协同作用,图像的视觉效果与图像质量得到提高.与其他先进方法进行定性和定量比较的实验结果表明,本文提出的方法在图像修复质量上表现更好.     

肉食品中脂类氧化的测定方法综述

本文综述了脂类氧化的多种测定方法,并详细说明了TBA试验的不同途径,也指明了该法可能的干扰和局限.     

Design of an EEG Preamplifier for Brain-Computer Interface

As a non-invasive neurophysiologieal index for brain-computer interface （BCI）, electroencephalogram （EEG） attracts much attention at present. In order to have a portable BCI, a simple and efficient pre-amplifier is crucial in practice. In this work, a preamplifier based on the characteristics of EEG signals is designed, which consists of a highly symmetrical input stage, low-pass filter, 50 Hz notch filter and a post amplifier. A prototype of this EEG module is fabricated and EEG data are obtained through an actual experiment. The results demonstrate that the EEG preamplifier will be a promising unit for BCI in the future.     

基于InP/InGaAs HBT技术的单片集成长波长光接收OEIC

采用InP/InGaAs HBT与PIN光探测器单片集成方案,对光接收光电集成电路(OEIC)的外延材料结构和生长、电路设计、制作工艺和性能测试进行了研究.基于自对准InP/InGaAs HBT工艺,实现了1.55μm波长单片集成光接收OEIC.发射极尺寸2μm×8μm的InP/InGaAs HBT直流增益为40,截止频率和最高振荡频率分别为45和54GHz;集成InGaAs PIN光探测器在-5V下响应度为0.45A/W@1.55/μm,暗电流小于10nA,-3dB带宽达到10.6GHz;研制的HBT/PIN单片集成光接收OEIC在2.5和3.0Gb/s速率非归零223-1伪随机码传输工作时可以观察到张开的眼图,灵敏度≤-15.2dBm@BER=10-9.