基于ZnO忆阻器的高鲁棒性毛刺型物理不可克隆函数设计

物理不可克隆函数(PUF)作为硬件安全原语,广泛应用于众多领域。针对传统硅基类PUF电路可靠性差和易受建模攻击等问题,该文提出一种基于忆阻器的“毛刺”型物理不可克隆函数电路(Glitch-PUF)。该方案首先利用忆阻器的非易失性和阻变效应,实现二值逻辑完备集;然后,利用完备集和竞争冒险现象设计忆阻毛刺产生模块,通过选通信号控制流经忆阻交叉阵列路径的延时大小,改变“毛刺”宽度获得稳定“毛刺”输出;最后,利用忆阻器的存算一体特性和施密特回滞效应设计忆阻采样模块,并测试Glitch-PUF性能。实验结果表明,所设计的Glitch-PUF电路相比文献,抗攻击性提高4.9%～14.3%,随机性达到98.2%,误码率(BER)为0.08%,具有优异的鲁棒性和稳定性。     

Linux下可执行文件的动态内存检测设计与实现

针对可执行文件的动态内存管理容易产生的错误,设计并实现了一个Linux 平台下针对C/C++语言的动态内存检测模块DDMEM,使用自定义的ddmemMalloc()函数改写动态分配函数malloc(),实现了一个共享库ddmem.so,可以检测内存泄漏、内存写溢出、释放野指针和内存管理函数的不匹配等问题。给出了函数不匹配的实例检测以验证方法的有效性。并与同类有代表性的检测工具memwatch进行了性能比较,证明该检测模块比memwatch整体更优。     

MEC规划方案及部署策略的探讨

5G新网络架构引入和关键技术应用正在推动网络变革和技术创新,加速通信运营商网络向以DC为核心的组网架构演进,促进MEC在5G网络中的规模部署和商用,成为未来网络和业务深度融合的新型关键基础设施。针对5G网络中MEC规划部署架构、方案和策略等关键问题,首先基于国内运营商网络重构的目标架构和关键举措,研究了MEC在5G网络中融合部署实施架构,其次结合业务、技术和运维等因素,提出了MEC规划方案和部署策略,最后阐述了固移融合趋势下MEC网络及平台体系架构。     

深孔镗床输油器的结构特点

介绍了深孔镗床输油器的作用及结构特点,并涉及了一些设计参数。     

NFV中单节点启发式资源分配方法

从网络包转发性能角度出发,通过实验深入分析DPDK对虚拟网络功能的加速效果及CPU资源消耗情况,并对单节点资源分配问题进行研究,证明了该问题是NP难类型,提出了基于贪心算法的启发式VNF资源分配算法。在此基础上,针对网络负载的潮汐现象,提出了一种基于网络负载的虚拟网络功能实例自动切换方案。实验结果显示,相较传统方式,该方案在高负载情况下VNF性能提升了20%。     

On some 4-Point Spline Collocation Methods for Solving Ordinary Initial Value Problems

This paper discusses collocation schemes based on seventh C 3 -splines with four collocation points s_{i-1+\alpha}=x_{i-1}+\alpha h , x_{i-1+\beta}=x_{i-1}+\beta h , x_{i-1+\theta}=x_{i-1}+\theta h and x_i=x_{i-1}+h in each subinterval [ x i @ 1 , x i ], i = 1(1) N for solving initial value problems in ordinary differential equations including stiff equations. Here 0 < f < g < è < 1 are arbitrarily given. It is shown that the methods are convergent and the order of convergence is seven if: \eqalign {&\beta(\theta -\theta^2)+\beta^2(\theta^2-\theta)+\alpha^2[\theta^2-\theta +\beta^2(1+4\theta -5\theta^2)+\theta(4\theta^2-4\theta -1)]\cr &\qquad \qquad \qquad +\alpha[\theta -\theta^2+\beta (1+4\theta -4\theta^2)+\beta^2(4\theta^2+4\theta -1)]\le 0 and they are unstable if f , g , è < 0.7279115. Moreover, the absolute stability properties of the methods are considered. It shows that with 0.888035 h f < g < è < 1 the methods are A-stable while they are not if f h 0.5; on other hand, the sizes of regions of absolute stability increase when f , g , è M 1 m.     

An optimized Radial Basis Function model for color characterization of a mobile device display

This paper presents an optimized color characterization model based on Radial Basis Functions (RBFs). The performance of the proposed model was tested on a number of different mobile devices and compared with the performance of other state of the art color characterization models. We compared the accuracy of models using the CIELAB color difference. Four different models were discussed in detail: Piecewise Linear Model Assuming Variation in Chromaticity, Polynomial regression, Artificial Neural Network, and proposed Radial Basis Function model. For training and evaluation of the models we measured a large number of color samples on various mobile device displays. Results have shown that our optimized RBF model has superior accuracy over other models with median color difference of 0.39. In addition, it has particularly good accuracy for colors on the boundary of device’s gamut with maximum color difference of 0.87, where other models shown unacceptably high (>10) color difference.     

浅谈电信网络综合告警系统建设方案

首先介绍了中国电信业竞争形势的变化,为适应形势变化,满足后端综合化集中维护需要,提出建设综合告警系统的必要性.然后重点介绍了综合告警系统所要实现的主要功能、系统架构及相关接口,最后对广西电信综合告警系统发展提出展望.     

Proper Orthogonal Decomposition and Radial Basis Functions in material characterization based on instrumented indentation

For the mechanical characterization of structural materials non-destructive tests combined with computer simulations and inverse analyses are more and more frequently and advantageously employed in various engineering fields. The contribution to such development presented in this paper can be outlined as follows. With reference to isotropic elastic-plastic material models, indentation test simulations are done preliminarily, once-for-all, by a conventional finite element forward operator. Results of these simulations are employed in a procedure which is centered on Proper Orthogonal Decomposition and Radial Basis Functions approximation and is used for fast interpolations which replace further finite element analyses in the parameter identification process. Comparative computational exercises are presented in order to point out the consequent significant reduction of computing times in test simulations and, hence, in the minimization of the discrepancy function by the Trust Region Algorithm, namely by a traditional first-order mathematical programming method. Such a parameter identification procedure may be carried out routinely and economically on small computers for in situ structural diagnoses. Both the force-penetration relationship (provided by an instrumented indenter) and the average imprint profile (achievable by laser profilometer) are considered as sources of measurable response quantities or experimental data.     

Performance Comparison of Optimally Designed Induction Motors with Aluminum and Copper Squirrel-Cages

A significant improvement in motor efficiency is expected when substituting aluminum with copper die-cast rotor in squirrel-cage induction motors due to a reduction in the rotor ohmic losses. Other performance criteria, such as starting torque, power factor, and steady-state current, may also change, and the motor may need to be redesigned to obtain optimal performance. This paper compares the performance of optimally designed squirrel-cage induction motors with aluminum and copper rotor bars with equivalent specifications. The design is optimized using three objective functions.