基于W态的量子确定性密钥分发方案

提出了一种基于W态的量子确定性密钥分发方案,方案采用在量子信道中传输更加稳定的W态作为承载信息的粒子,利用量子相干特性以及一串公开的信息序列S作为密钥分发的关键,在兼顾传输粒子稳定性的前提下能够达到54.54%的密钥分发效率,与使用GHZ态相比,在效率相差无几的情况下保证粒子在传输过程中具有更强的鲁棒性。安全分析表明,此方案能经受窃听者采取的截获——转发（重发）攻击和纠缠攻击两种攻击方式,确保通信安全可靠。同时,该方案在执行过程中不涉及任何幺正操作,简单便捷。     

基于W5100的RS485-Ethernet数据转换器设计

为了提高分布式系统的数据通信性能,采用以太网和RS485总线的集成使用,在不改变原有网络结构的情况下,将RS485总线控制系统改造为以太网分布式控制系统,设计了一种低成本的基于W5100和STC单片机的RS485-以太网协议转换器。在介绍转化器的作用环境基础上,对其硬件结构和软件设计做了简要介绍。经使用证明,设计的转换器可实现RS485和以太网2个网络的透明通信,实现远距离、快速和可靠的数据传输,具有一定的实用性和推广价值。     

基于STM32的某型装备工况分析仪的设计

为解决对某型装备的CAN总线数据的实时采集转发的问题,设计一种基于STM32的CAN数据采集分析仪.下位机基于RT-Thread实时操作系统,使用W5500实现与以太网的连接,作为客户端建立与PC服务器端的TCP连接,捕获CAN总线数据然后重构成以太网数据包并通过SPI总线传给W5500,后者将其转换为以太网数据包并通过RJ45网口发送给PC服务器.数据采集仪可以实时采集高速CAN数据并转发给PC服务器,便于计算机进行后期处理并分析装备工作状况.     

Side chain effect on photovoltaic properties of dibenzo[a,c]phenazine based donor–acceptor polymers

The electron–donor polymers containing dibenzo[a,c]phenazine (BPz) derivatives with 2,7-alkyl and 11,12-alkoxy substituted, PBDT-BPzC and PBDT-OBPz, respectively, were synthesized to investigate the photovoltaic effect of different side chain substitutions. The polymers exhibit similar physical properties, except the HOMO and LUMO of PBDT-BPzC are 0.18 and 0.15 eV deeper than PBDT-OBPz, resulting in the V_oc of polymer solar cells (PSCs) based on PBDT-BPzC are above 0.1 V higher than that of PBDT-OBPz. With the contribution of the superior V_oc, polymer PBDT-BPzC showed preferable photovoltaic performances, and the PCE reached 4.44%, which is 0.49% higher than PBDT-OBPz. This research reveals a preferred side chain substituted way to modify BPz unit, and gives an optimally developing the dibenzo[a,c]phenazine derivatives based electron–donor polymers.     

InGaP//GaAs//c‐Si 3‐junction solar cells employing spectrum‐splitting system

In this work, we practically demonstrated spectrum‐splitting approach for advances in efficiency of photovoltaic cells. Firstly, a‐Si:H//c‐Si 2‐junction configuration was designed, which exhibited 24.4% efficiency with the spectrum splitting at 620 nm. Then, we improved the top cell property by employing InGaP cells instead of the a‐Si:H, resulting in an achievement of efficiency about 28.8%. In addition, we constructed 3‐junction spectrum‐splitting system with two optical splitters, and GaAs solar cells as middle cell. This InGaP//GaAs//c‐Si architecture was found to deliver 30.9% conversion efficiency. Our splitting system includes convex lenses for light concentration about 10 suns, which provided concentrated efficiency exceeding 33.0%. These results suggest that our demonstration of 3‐junction spectrum‐splitting approach can be a promising candidate for highly efficient photovoltaic technologies. Copyright © 2016 John Wiley & Sons, Ltd.     

Ultralong Circulating Lollipop‐Like Nanoparticles Assembled with Gossypol,Doxorubicin, and Polydopamine via π–π Stacking for Synergistic Tumor Therapy

Long blood circulation in vivo remains a challenge to dual‐drug‐loaded nanocarriers for synergistic chemotherapy. Herein, a novel strategy to prepare lollipop‐like dual‐drug‐loaded nanoparticles (DOX–PDA–gossypol NPs) is developed based on the self‐assembly of gossypol, doxorubicin (DOX), and polydopamine (PDA) via π–π stacking. Dopamine polymerizes to PDA and fills the gaps between the gossypol and DOX molecules to form the super compact long‐circulating nanoparticles. The DOX–PDA–gossypol NPs show a suitable particle size of 59.6 ± 9.6 nm, high drug loading of 91%, superb stability, high maximum‐tolerated dose (MTD) of over 60 mg kg^‐1, and negligible toxicity. These NPs also exhibit pH‐dependent drug release and low combination index (0.23). Notably, they show dramatically ultralong blood circulation (>192 h) with elimination half times 458‐fold and 258‐fold longer than that of free DOX and free gossypol, respectively. These values are markedly higher than most of the reported results. Therefore, the DOX–PDA–gossypol NPs have a high tumor accumulation of 12% remaining on the 8th day postinjection. This characteristic contributes to the excellent tumor comprehensive synergistic therapeutic efficacy (TIR > 90%) with low administration dosage and is benefitted for widening the drug therapeutic window. Thus, the proposed strategy has remarkable potential for tumor synergistic therapy.     

一种较好的三粒子W态概率隐态传输方案

提出一种较好的三粒子W态概率隐形传输方案,该方案用三个三粒子W直积态作为量子通道。和闫等人的方案相比,该方案具有以下的优点：提出一种新的正交完备测量基取代了以往所使用的Bell基测量。接收者根据发送者的测量结果实施适当的幺正变换操作,隐形传输成功的概率可以提高到 。     

用于先进的双嵌入和栓工艺的低缺陷钨CMP高性价比浆料(英文)

介绍了用于钨双嵌入和钨栓CMP工艺的新型CMP3200TM氧化铝浆料,测试证明,这种浆料在110nm技术节点的钨CMP工艺应用中取得了理想的效果。通过对氧化铝粒子制造工艺的有效控制,获得了可满足110nm技术节点双嵌入和栓层钨CMP工艺要求的低缺陷率,高性价比的氧化铝蛐硝酸铁浆料。从而在价格竞争激烈的半导体制造领域,特别是代工市场引起了业界越来越多的关注。     

走向智能化的第三代移动通信系统

第三代移动通信系统最重要的技术特征是智能移动通信技术,即系统的各功能模块的智能处理单元来实现,这些单元包括智能天线、智能传输、智能接收、智能业务接入和智能网络管理,智能天线的研究最有物色的是适合于ＣＤＭＡ的智能天线技术,智能传输主要涉及延寿适应调制、综合功率控制等;在智能接民中使用中国科技大学提出的最小均方误差简化方法（Ｓ－ＭＭＳＥ）检测的用户数经常规方法的用户数增加约一半,有很好的应用可能;智能     

扫描隧道显微镜钨针尖的制备与表征

采用直流电化学刻蚀方法制备扫描隧道显微镜钨针尖,研究了电化学刻蚀过程中NaOH溶液浓度、钨丝浸入长度和刻蚀电压对针尖形貌的影响。通过扫描电子显微镜(SEM)测量针尖曲率半径和针尖纵横比值,以表征针尖的尺寸和形状;通过能谱仪(EDS)分析针尖表面成分,以表征表面清洁度;通过场发射显微镜(FEM)得到Fowler-Nordheim (F-N)曲线来检测针尖发射性能。实验结果表明,当溶液浓度为2 mol/L、钨丝浸入长度为4 mm、刻蚀电压为3 V时,可以得到曲率半径约为100 nm、纵横比值为13的针尖,且表面无钨的氧化层。FEM结果显示当对针尖施加500 V的负偏压时,针尖可以稳定发射50 nA量级的电流,且针尖性能具有良好的一致性。