基于实时微内核的零拷贝通信协议

在分析现有零拷贝通信协议实现的基础上,提出了基于实时微内核的零拷贝通信协议RTZCP.针对不同的应用场景,RTZCP协议对单个数据包采用了传统的内存重映射方式来消除用户空间与内核空间之间的数据拷贝,而对于需要分片的大数据包,则采用RMA(远程内存访问)方式来实现零拷贝通信的目的.设立了专门静态网络通信资源的分配管理机制,以及具有缓冲机制的通信接口技术来优化处理IP数据包的分片机制.测试结果表明,RTZCP协议能够在提供比传统网络通信协议更低的通信延时的情况下,充分地保证实时数据包的实时通信性能.     

液态危险品船舶的远程监视报警系统设计

为了有效监测液态危险品船舶运输过程中液货舱液位、压力、温度和惰性气体含量等安全状态参数的实时状况,采用单片机作为微处理器,设计数据采集与处理模块;基于北斗定位与短报文通信技术,实现船舶数据远程传输,并在B/S架构下开发岸基监控报警管理平台,完成液态危险品船舶远程监视报警系统的研发,最后通过实验平台和实船,对系统性能进行...     

微生物废水处理产甲烷的自动控制系统

结合现代的自动控制技术和互联网技术,设计了基于微生物废水处理产甲烷的自动控制系统.选用基于Cortex A9主控芯片的Exynos4412作为控制核心,使用云架构的tomcat服务器进行数据存储,配合现场工业级执行单元与标准专用传感器,实现了微生物培养进而处理工业废水以及提高甲烷生产含量的目标.实际运行结果表明:该系统成功将废水处理至排放标准并使得生产的甲烷含量由52%提升至77%,具有较高的实用价值和应用推广价值.     

基于LabVIEW与SQL server设计的浮标电源远程管理系统

针对现有海洋浮标缺乏对电源有效监控管理的问题,提出了一种基于LabVIEW与SQL server编程,结合C8051F021单片机硬件的方法,设计了岸站服务器的终端监控软件和安装于浮标上的硬件电路。通过网络或北斗通讯等实时通讯方式,实现对浮标上电源的实时监控和管理,提高了浮标电源的利用和管理的能力。     

Remote Fluorination and Fluoroalkyl(thiol)ation Reactions

Remote functionalization reactions have the power to transform a C−H (or C−C) bond at a distant position from a functional group. This Review summarizes recent advances and key breakthroughs in remote fluorination, trifluoromethylation, difluoromethylation, trifluoromethylthiolation, and fluoroalkenylation reactions. Several powerful strategies have emerged to control the reactivity and distal selectivity such as the undirected radical approach, the 1,5-hydrogen atom transfer, the metal migration, the use of distant directing groups, and the ring-opening reactions. These unconventional and predictable C−H (and C−C) functionalization transformations should allow for the preparation of a wide range of otherwise-difficult-to-access alkyl, aromatic, heteroaromatic, and structurally complex fluorides.     

基于微信平台防火防盗系统的设计与实现

为提高学生宿舍的火灾预警以及防盗报警的能力, 给学生提供安全舒适的居住环境, 运用无线传感网技术和后台服务器开发技术, 设计了基于微信公众平台的防火防盗系统。 通过该系统用户可使用微信端实时查看室内状况, 实现对学生宿舍的远程监控。 该系统成本低、 操作灵活、 界面友好, 经实际使用获得了很好的用户体验。     

Propagating surface plasmon polaritons for remote excitation surface-enhanced Raman scattering spectroscopy

To illustrate the attractive potentials of remote-excitation surface enhanced Raman scattering (RE-SERS), we review the fundamental concepts and typical applications of propagating surface plasmon polaritons (PSPPs). Based on the RE-SERS technic, the adsorbed molecules are protected from being directly illuminated, while the merits of SERS still remained. However, the critical limitations of applying RE-SERS hinder its rapid development. Hence, drawing an overview about the PSPPs would be beneficial for further promoting the significance of RE-SERS in biological application and investigating the mechanism of surface catalytic reactions.     

相干激光雷达中最大似然离散谱峰值估计及Monte Carlo仿真

相干测风激光雷达中一个核心的问题是从微弱的气溶胶后向散射信号中估计出风速。基于零均值复高斯随机过程协方差矩阵统计模型的后向散射信号,首先讨论了最大似然（ML）离散谱峰值（DSP）风速估计算法的克拉美-罗下界（CRLB）与由Fisher信息矩阵论得到的精确CRLB之间的关系。其次,对于ML DSP估计应用于相干测风激光雷达中协方差矩阵统计模型的后向散射信号时,使用计算机Monte Carlo仿真的方法研究了风速估计的概率密度函数。分别讨论了信噪比、激光脉冲累积发数和发射激光脉冲宽度对ML DSP风速估计性能的影响。计算仿真结果表明：ML DSP风速估计的CRLB低于精确的CRLB;在信噪比为－20 dB,100发激光脉冲累积和信噪比为－30 dB,10 000发激光脉冲累积条件下,ML DSP风速估计中坏的估计值所占的比例都为0,好的估计值的标准差分别为0.62 m/s和0.50 m/s。     

Trace Distance of Remote State Preparation Through Noisy Channels

In this paper, we study remote state preparation (RSP) by w state through noisy channels. The trace distance is used to describe how close the original state is to the output state. Studies show the trace distance is a function of decohenrence rates and angles of the state to be prepared. At the same time, we investigate the influence of different types of noises on the trace distance and find the various types of noises have different degrees of influence on the trace distance for a definite qubit. We also study changes of the trace distance against polar and azimuthal angles.     

Multiparty-Controlled Remote Preparation of Two-Particle State

We propose a scheme for multiparty-controlled remote preparation of the two-particle state by using two non-maximally Greenberger-Horne-Zeilinger states as quantum channel. Our scheme consists of one sender and n remote receivers. It will be shown that the sender can help either one of the n receivers to remotely preparation the original state with the appropriate probability, and the sender Alice＇s two-particle projective measurement and the controllers＇ single-particle product meazurements are needed. We also obtained the probability of the successful remote state preparation.