一种基于纠缠态的量子中继通信系统

提出了一种基于纠缠态的量子中继通信系统,该系统应用纠缠为基本资源.纠缠为量子隐形传态和绝对安全的量子通信提供了保证.量子中继器用来延长高纠缠度的纠缠光子对的纠缠距离,利用纠缠交换和纠缠纯化在系统的发信者与受信者之间建立光子对的纠缠.应用量子隐形传态的原理传输量子信息.系统分析表明,量子通信系统的吞吐率随着通信双方成功建立纠缠的概率增大而显著增加,量子信号的传输距离取决于量子中继节点的级数.     

Synthesis of PNIPAAm-g-P4VP Microgel as Draw Agent in Forward Osmosis by RAFT Polymerization and Reverse Suspension Polymerization to Improve Water Flux

Microgels have unique and versatile properties allowing their use in forward osmosis areas as a draw agent. In this contribution, poly(4-vinylpyridine) (P4VP) was synthesized via RAFT polymerization and then grafted to a poly(N-Isopropylacrylamide) (PNIPAAm) crosslinking network by reverse suspension polymerization. P4VP was successfully obtained by the quasiliving polymerization with the result of nuclear magnetic resonance and gel permeation chromatography characterization. The particle size and particle size distribution of the PNIPAAm-g-P4VP microgels containing 0, 5, 10, 15 and 20 wt% P4VP were measured by means of a laser particle size analyzer. It was found that all the microgels were of micrometer scale and the particle size was increased with the P4VP load. Inter/intra-molecular-specific interactions, i.e., hydrogen bond interactions were then investigated by Fourier infrared spectroscopy. In addition, the water flux measurements showed that all the PNIPAAm-g-P4VP microgels can draw water more effectively than a blank PNIPAAm microgel. For the copolymer microgel incorporating 20 wt% P4VP, the water flux was measured to be 7.48 L∙m⁻²∙h⁻¹.     

5G边缘感知性能提升研究

5G网络发展初期,网络未达到连续覆盖,5G边缘感知问题突出。同时,为了提升5G分流比,用户需要尽可能驻留在5G网络上,随之边缘用户感知将会进一步下降。针对这一问题,本文通过边缘感知问题发现识别和边缘感知性能优化提升两项举措开展5G边缘感知提升策略研究,利用策略部署提升5G边缘用户性能感知。部署后,边缘用户感知提升明显。     

基于方向信息测度的最小模糊度准则边缘检测

将像素点的方向信息测度作为判别边缘点的特性指标,借用Huang等构造的自适应确定分割阈值的思想,本文提出了一种基于方向信息测度的最小模糊度准则边缘检测方法。文中提出的方法,一方面由于采用了方向信息测度,可以很好地将边缘点和非边缘点区分开来;另一方面通过最小化模糊度,自适应地将给定图像的所有像素点按照方向信息测度分成两类,从而达到提取边缘的目的。实验结果证明,我们提出的方法能够很好地判别边缘点,有效地提取图像的边缘。     

动力调谐陀螺仪的瞬态动力学及误差分析

为了建立陀螺仪在过载—振动复合环境下的误差模型,应用有限元分析软件ANSYS,针对某型导弹使用的动力调谐陀螺仪的结构,建立基于具体参数的实体和有限元动力学模型,并开展了陀螺仪的瞬态动力学分析研究,由此计算由于陀螺转子和平衡环的质心偏移造成的陀螺仪漂移误差,得到在过载—振动复合环境下陀螺仪漂移角速度与在过载、振动单一环境下漂移角速度之间的关系。     

Rutin Inhibits Ox-LDL-Mediated Macrophage Inflammation and Foam Cell Formation by Inducing Autophagy and Modulating PI3K/ATK Signaling

Atherosclerosis (AS) is one of the leading causes of death among the elderly, and is primarily caused by foam cell generation and macrophage inflammation. Rutin is an anti-inflammatory, anti-oxidant, anti-allergic, and antiviral flavonoid molecule, known to have anti-atherosclerotic and autophagy-inducing properties, but its biological mechanism remains poorly understood. In this study, we uncovered that rutin could suppress the generation of inflammatory factors and reactive oxygen species (ROS) in ox-LDL-induced M2 macrophages and enhance their polarization. Moreover, rutin could decrease foam cell production, as shown by oil red O staining. In addition, rutin could increase the number of autophagosomes and the LC3II/I ratio, while lowering p62 expression. Furthermore, rutin could significantly inhibit the PI3K/ATK signaling pathway. In summary, rutin inhibits ox-LDL-mediated macrophage inflammation and foam cell formation by inducing autophagy and modulating PI3K/ATK signaling, showing potential in treating atherosclerosis.     

极化理论在课堂教学中的问题与策略

极化理论是"天线与电波传播"课程的教学要点和难点,理论性和实践性都很强.本文从分析极化理论在课堂授课中存在的主要问题入手,科学制定授课思路进行课堂设计,进而详细分析了电磁波极化理论和天线极化理论两大模块在授课过程中存在的主要问题,并针对性的提出相应的解决策略,有助于加深学员对电磁波极化和天线极化的理解和掌握,提高课堂的...     

基于ICE与HTTP Tunnel技术的NAT/FW穿越方案

在现代网络中,越来越多的主机被部署在NAT和防火墙(FW)之后,这就要求VoIP、P2P等通信软件必须具备穿越NAT/FW的能力,才能实现端到端的数据传输.现有的STUN、TURN、ICE等方案虽然可以穿越大部分NAT/FW,但对有端口或协议限制的防火墙却无能为力.本文提出了将ICE和HTTP Tunnel技术相结合的穿越方案,设计并实现了可跨平台运行的HTTP Tunnel模块来配合ICE进行穿越.实验证明,在防火墙只开放80端口这种苛刻的条件下,该HTTP Tunnel模块也能够成功穿越大部分防火墙,实现数据流的稳定传输.     

非制冷红外焦平面阵列进展

非制冷红外成像技术已广泛应用于军事和民用领域,一直是人们关注的焦点之一,其核心部件是非制冷红外焦平面阵列(IRFPA:Infrared Focal Plane Array)。综述了几种具有代表性的非制冷IRFPA的探测原理、发展历史和现状。它们是:热敏电阻型、热释电型、热电堆型、二极管型、热-电容型非制冷IRFPA和应用光力学效应的非制冷IRFPA、基于法布里-珀罗微腔阵列的非制冷IRFPA。     

中国电子线市场现状与发展

电子线作为电子信息产品的重要组成部件,被誉为电子电气类产品的"血管"和"神经".得益于电子信息产业的迅猛发展,我国电子线行业也以年均45%-50%的速度增长.未来电子线的将朝着"细、薄、安全、环保、高速传输"的方向发展.