光刻投影物镜中动镜X-Y向柔性调节机构设计

针对光刻投影物镜中动镜X-Y向调节机构精度高、行程小、结构紧凑的需求,提出了一种X-Y向一体式调节机构.所提机构基于四连杆调节原理,利用内外圈独立分布的X-Y向柔性铰链,无需解耦即可实现X/Y向高精度调节.首先根据投影物镜中动镜的调节精度和行程,完成所提机构的结构设计;然后运用有限元分析法仿真分析所提X-Y向柔性调节机...     

Open‐Shell Donor–Acceptor Conjugated Polymers with High Electrical Conductivity

Conductive polymers largely derive their electronic functionality from chemical doping, processes by which redox and charge‐transfer reactions form mobile carriers. While decades of research have demonstrated fundamentally new technologies that merge the unique functionality of these materials with the chemical versatility of macromolecules, doping and the resultant material properties are not ideal for many applications. Here, it is demonstrated that open‐shell conjugated polymers comprised of alternating cyclopentadithiophene and thiadiazoloquinoxaline units can achieve high electrical conductivities in their native “undoped” form. Spectroscopic, electrochemical, electron paramagnetic resonance, and magnetic susceptibility measurements demonstrate that this donor–acceptor architecture promotes very narrow bandgaps, strong electronic correlations, high‐spin ground states, and long‐range π‐delocalization. A comparative study of structural variants and processing methodologies demonstrates that the conductivity can be tuned up to 8.18 S cm^?1. This exceeds other neutral narrow bandgap conjugated polymers, many doped polymers, radical conductors, and is comparable to commercial grades of poly(styrene‐sulfonate)‐doped poly(3,4‐ethylenedioxythiophene). X‐ray and morphological studies trace the high conductivity to rigid backbone conformations emanating from strong π‐interactions and long‐range ordered structures formed through self‐organization that lead to a network of delocalized open‐shell sites in electronic communication. The results offer a new platform for the transport of charge in molecular systems.     

Delamination‐Free Functional Graphene Surface by Multiscale,Conformal Wrinkling

Obtaining a delamination‐free wrinkled functional graphene surface in layered systems is an interesting challenge because the interface is usually too weak to withstand interfacial stress mismatch, which can trigger mechanical instability. In this paper, a general strategy is proposed toward addressing the delamination limitation imposed by fabricating conformal graphene wrinkles with bilayer systems of poly(methyl methacrylate) (PMMA) and polydimethylsiloxane (PDMS). To improve the interfacial strength, a postcuring transfer process is introduced to form a gradient interface layer without interfacial liquid between the PMMA and PDMS by entanglement of polymer chains during high‐temperature curing. Compared to the conventional wet transfer of graphene,the transfer method can greatly enhance the interfacial strength. The chemical and mechanical mechanisms underlying the enhancement are revealed both experimentally and theoretically in terms of the transition from the buckled‐induced delamination state to the delamination‐free wrinkled state. Moreover, the light diffraction behaviors of multiscale graphene wrinkles are initially demonstrated to be an interesting continuous pattern induced by overlapping. The delamination‐free conformal wrinkled functional graphene surface can provide valuable insight and design guidelines for the fundamental problems of deformed graphene and its applications in flexible functional devices.     

谈喷印机喷印工艺与油墨性能的关系

喷印机的喷印过程中,喷印质量直接受油墨性能和喷印工艺参数的影响。本文从喷印机的实用性出发,主要分析探讨了在保证喷印质量的情况下喷印工艺参数的设定与油墨性能的相互关系,并对喷印工艺参数的设定和油墨的使用提出了一些量化指标,为使用者在选择油墨及对油墨性能进行调整和改善提供一定的参考依据,对喷印机的实际应用也有着一定的指导意义。     

基于时空变换的CT界面快速定位方法研究

相控阵超声CT成像技术现在已经逐渐应用于工业检测中,本文在通过研究相控阵理论的基础上,利用了时空变换法把检测到的三维时间信号族变换到二维空间灰度图,并且通过研究灰度图特征,达到快速对检测界面定位的目的。     

商业银行信息系统研发风险模型研究

随着网络攻击方向的转变和攻击形式的层出不穷,应用系统安全问题日益凸显,而从研发过程着手提升信息系统安全性已逐渐成为业界共识.通过对当前主流的几种软件安全开发模型的对比与分析,总结软件安全开发模型的共有特点并结合商业银行信息系统风险特征,提出一种基于安全活动的商业银行信息系统安全研发模型,通过在信息系统研发全生命周期各阶段实施安全活动来提升其安全性,降低商业银行信息系统风险.     

卫星地球站天馈系统的技术改造

本文从实际应用出发,以浙江卫星地球站天馈系统为实例,对卫星站上行链路天馈系统的结构和功能作简要分析,剖析目前天馈系统存在的缺陷,并针对问题提出改造思路。结合同期广电总局对全国地球站提出的50dB耦合器的技术改造要求,详细阐述新天馈系统的设计方案和具体实施步骤。     

通信工程特色专业改革探索与实践

本文针对当前社会对人才需求和高校人才培养模式,结合我院的学科特色和本科教育经验,介绍了通信工程国家第二类特色专业的专业定位、专业建设目标和专业建设思路,以及专业在建设过程采取的与时俱进、以人为本、求真务实、发挥优势、内培外引、凝练成果和夯实基础等举措。     

更换旧蓄电池组应注意的安全问题

先期使用的大批阀控式密封铅酸蓄电池(VRLA电池),及固定型防酸隔爆式铅酸蓄电池(GGF电池)由于各种原因容量下降,不能保证其正常使用需进行更换。本文对如何安全可靠进行新旧蓄电池组的更换割接提出建议。     

An Efficient Paging Strategy Based on Paging Agents of Base Stations in Cellular Mobile Networks

We propose a new paging strategy to reduce paging cost by adding paging agents at base stations. When a mobile‐terminated call occurs, the base stations look up the paging agents to determine if terminal paging is actually to be made. An analytical model based on a Markov chain is used to evaluate the performance of the proposed strategy. The numerical results show that the proposed strategy significantly reduces the paging cost compared with the simultaneous paging strategy.