共查询到20条相似文献,搜索用时 93 毫秒
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可信计算模式下P2P匿名通信系统设计 总被引:1,自引:0,他引:1
为了提高P2P匿名通信系统的安全性与可信性,需要对P2P匿名通信系统进行设计。当前使用的匿名通信系统,无法在用户节点匿名的情况下,保证P2P匿名通信系统匿名节点的可信性。因此,提出一种基于可信计算模式的P2P匿名通信系统设计方法。该系统的硬件部分分为系统登录模块、通信模块、数据模块、可信计算模块4大模块,模块之间相互合作,形成一个完整的匿名通信系统,匿名通信系统软件设计部分通过建立可信计算的联接,实现在匿名通道中进行数据传递,并对待传递的数据进行层次性打包加密,同时采用可信度计算对匿名通信系统中节点、匿名通道进行计算,形成安全可信的匿名传递通道。实验仿真证明,该方法在保证该系统数据传递的效率的同时提高了匿名通信系统的安全性与可靠性。 相似文献
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导电聚合物P3MT,P3BT,P3HT的低温物性研究 总被引:1,自引:0,他引:1
在导电聚合物的研究领域中,聚噻吩(PTh)是近来引起广泛注意的一种共轭聚合物.为了进一步了解其导电机制,本文对聚噻盼的一系列衍生物 P3MT,P3BT,P3HT 的低温电导,低温高压及低温热电势等基本物性做了系统的研究,并找出这些物性随取代基大小的变化规律. 相似文献
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Jianliang Sun 《Journal of luminescence》2012,132(6):1515-1521
In this paper, a diamine ligand of 2-(5-phenyl-[1,3,4]oxadiazol-2-yl)-pyridine (OP) and its corresponding Cu(I) complex of [Cu(OP)(POP)]BF4 with bis(2-(diphenylphosphanyl)phenyl) ether (POP) as the phosphorous ligand are synthesized. Full characterization on [Cu(OP)(POP)]BF4, including NMR, elemental analysis and single crystal analysis, confirms its molecular identity. Upon photon excitation, the emission of [Cu(OP)(POP)]BF4 owns a long excited state lifetime of 42.92 μs and shows a maximum at 570 nm, under pure N2 atmosphere. Theoretical calculation on [Cu(OP)(POP)]BF4 single crystal suggests that the excited state has a triplet metal-to-ligand-charge-transfer character. By embedding [Cu(OP)(POP)]BF4 into a optical silica supporting matrix of MCM-41, the emission signal is found to be sensitive towards various oxygen concentrations, with a maximum sensitivity of 7.31 (sensitivity=luminescence intensity in O2 medium/luminescence intensity in N2 medium). This improved sensitivity value compared with literature values is attributed to the introduction of POP ligand, which can suppress the intermolecular aggravation between [Cu(OP)(POP)]BF4 molecules and favor the oxygen attack on [Cu(OP)(POP)]BF4 excited state. Due to the same reason, a short response time is also observed with stable quenching signal. 相似文献
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HIRFL-CSR工程对CSRe冷却装置电子冷却部分的控制系统在实时性和可靠性方面提出了非常高的要求。 电子冷却工作环境复杂, 各种干扰难以预测。 从电子冷却的控制系统改进出发, 以实现电子冷却的自动调束为目标, 以高端FPGA和ARM嵌入式系统为基础, 采用P2P通讯技术和神经元网络算法来实现对电子冷却的自动控制。 该控制系统对电子冷却控制的完善提供了先进的硬件平台和软件实现方案。 In the HIRFL-CSR project,it needs the high performance requirement in real time and reliability for the control system of CSRe’s cooling equipment——Cooler. Simultaneously, the running environment of the Cooler is very complex and it is difficult to predict various kinds of interference. To solve these problems, we focus on the improvement on the control system of the Cooler. The high performance FPGA and ARM embedded systems are used to realize the beam commissioning automatically,and the P2P(Peer to peer) technology and the neural network algorithm are adopted to implement the automatic control of the Cooler. The system provides the advanced hardware platform and the design proposal for the cooling control system. 相似文献
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P2P计算近年来已经日趋普遍。它提供很多吸引人的特性。比如自主性、负载平衡、有效性、容错冗余和匿名。但它同样面临一些严峻的挑战。在本论文中,提出一种有效的簇集主干点层级P2P结构模型(ECGP)。该模型提供了一种半结构化的层次结构(类似混合P2P系统),克服了现存的非结构化P2P系统中存在的扩展性不好和效率不高的问题。 相似文献
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D. Calvo 《Hyperfine Interactions》2014,229(1-3):129-137
The P?ANDA experiment will make use of cooled antiproton beams of unprecedented quality that will be available at the Facility for Antiproton and Ion Research (FAIR) in Darmstadt. The envisaged physics program includes: meson spectroscopy, baryon antibaryon production, baryon spectroscopy, hypernuclar physics, hadron properties in the nuclear medium and electromagnetic processes. This rich physics program asks for a general purpose apparatus. The design of the experiment is an advanced stage and the R&D phase is approaching its final phase, as resulted by most of the Technical Design Reports (TDRs) being already completed or under writing. In addition the production phase has already started for the electromagnetic calorimeter. 相似文献
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用多组态自洽场方法,结合提出的半经验拟合公式,计算了高离化态类钴Rh^18 离子3p^63d^9—3p^53d^10,3p^63d^9—3p^63d^84p跃迁和振子强度,并与实验进行了比较. 相似文献
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置于同一池中的钠原子和铷原子,分别被连续染料激光器和铷光谱灯激发到Na(3P),Rb(5P),Na(3P)原子密度由吸收等效宽度技术测定,利用调制技术分离出了由异核碰撞产生的荧光光谱,观察到了Na(3P)和Rb(5P)问的碰撞能量合并现象,并测定了其碰撞截面。 相似文献
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置于同一池中的钠原子和铷原子,分别被连续染料激光器和铷光谱灯激发到Na(3P),Rb(5P),Na(3P)原子密度由吸收等效宽度技术测定,利用调制技术分离出了凡异核碰撞产生的荧光光谱,观察到了Na(3P)和Rb(5P)间的碰撞能量俣并现象,并测定了其碰撞截面。 相似文献
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