延长千瓦级CO_2激光器工作气体使用时间

ＪＫ－１３型２ｋＷ横流式ＣＯ_２激光器,在每天漏气速率为０．４ｋＰａ～０．５３ｋＰａ的条件下,采用排气逐步降低工作气压和更新部分工作气体的方法,工作气体使用时间达５００ｈ以上,激光器的输出功率平均为１．６ｋＷ,电光转换效率平均为 １５％,工作气体还能继续使用。     

用于脑血流量检测的近红外光谱术

介绍了用于大脑血流量检测的近红外光谱术的基本原理和实验体系,该系统可完成对近红外光学信号的实时采集、处理和显示等功能。在血模型实验结果基础上,报道了大脑血流量变化的近红外光学检测结果。     

集成电路光刻镜扫描控制系统

用同步辐射光源进行大规模集成电路和微器件光刻是现阶段的一项高新技术。本文介绍同步辐射光刻的镜扫描控制系统。它的设计思想,所采用的方法以及最优控制等都具有科技应用和经济价值。     

含La或Sm的BaNd_(2-y)R_yTi_(4+x)O_(12+2x)瓷的结构与性能

ＢａＯ－Ｎｄ２Ｏ３－ＴｉＯ２系富钛区含Ｌａ或Ｓｍ的陶瓷,ＸＲＤ、ＳＥＭ显微结构分析表明,其主晶相为Ｒ（Ｒ＝Ｌａ或Ｓｍ）取代Ｎｄ固溶体ＢａＮｄ２－ｙＲｙＴｉ５Ｏ１４和ＢａＮｄ２－ｙＲｙＴｉ４Ｏ１２,均属斜方晶系,并存在少量的次晶相Ｒ２Ｔｉ２Ｏ７、ＢａＴｉ４Ｏ９、Ｂａ２Ｔｉ９Ｏ２０等。富钛区ＢａＮｄ２Ｔｉ４＋ｘＯ１２＋２ｘ（ｘ＝０～１．４００）组分和含Ｌａ或Ｓｍ的ＢａＮｄ２－ｙＲｙＴｉ５Ｏ１４组分所组成的瓷料,介质损耗显著地降低,介电常数和电容温度系数遵从李赫涅德凯对数混合定律。     

多业务并行ATM交换机智能输入端口控制器的研究

本文提出了一种基于多业务并行ＡＴＭ 交换机的智能输入端口控制器。主要功能是为新到达的单播和多播信元在并行多级互连网（ＭＩＮ）中寻找到一条能够成功建立连接的路径。目的是降低信元在并行多级互连网中的阻塞概率,提高交换机的吞吐量     

Magnetocontrollable Droplet and Bubble Manipulation on a Stable Amphibious Slippery Gel Surface

Smart manipulation of liquid/bubble transport has garnered widespread attention due to its potential applications in many fields. Designing a responsive surface has emerged as an effective strategy for achieving controllable transport of liquids/bubbles. However, it is still challenging to fabricate stable amphibious responsive surfaces that can be used for the smart manipulation of liquid in air and bubbles underwater. Here, amphibious slippery surfaces are fabricated using magnetically responsive soft poly(dimethylsiloxane) doped with iron powder and silicone oil. The slippery gel surface retains its magnetic responsiveness and demonstrates strong affinity for bubbles underwater but shows small and switching resistance forces with the water droplets in air and bubbles underwater, which is the key factor for achieving the controllable transport of liquids/bubbles. On the slippery gel surface, the sliding behaviors of water droplets and bubbles can be reversibly controlled by alternately applying/removing an external magnetic field. Notably, compared with slippery liquid‐infused porous surfaces, the slippery gel surface demonstrates outstanding stability, whether in air or underwater, even after 100 cycles of alternately applying/removing the magnetic field. This surface shows potential applications in gas/liquid microreactors, gas–liquid mixed fluid transportation, bubble/droplet manipulation, etc.     

SDN/NFV技术在宽带IP城域网中的应用

针对传统宽带IP城域网面临的挑战和问题,基于软件定义和虚拟化等技术,文章提出宽带IP城域网络需要从简单的连接型网络向智能的功能型网络演进的思路和架构,并给出新形势下的应用场景,从而满足其智能化运营的发展需求。     

Transition‐Metal‐Free Magnesium‐Based Batteries Activated by Anionic Insertion into Fluorinated Graphene Nanosheets

Considering resource abundance, high volumetric energy density, and safer anodic electroplating, the Mg‐based battery is thought to be one of the most promising systems beyond current Li‐ion batteries. However, the development of Mg batteries is hindered by the narrow electrochemical window of electrolytes as well as by inapplicable cathode frameworks. In this work, it is proposed, for the first time, to utilize a fast surface redox process to replace sluggish lattice migration for improving the kinetics of Mg batteries. Taking fluorinated graphene nanosheets (FGSs) as model material, a reversible capacity higher than 100 mAh g^?1 is achieved in a pseudocapacitance behavior from 2.75 to 0.5 V. Different from traditional storage mechanisms, this proof‐of‐concept Mg/FGS system is activated by a prior anionic process followed by reversible cationic storage. The dilution of charge density by forming large‐sized monovalent complex cations and the easy access to surface redox sites are responsible for the negligible voltage polarization without an evident MgF₂ nucleation phenomenon.