基于信息熵的5G终端性能网格化评价算法

5G终端性能评价在网络优化领域发挥着重要作用.本文提出了一种基于信息熵算法的网络大数据5G终端性能网格化评价方法.首先构建并改进了5G终端评价系统,将5G驻留时间作为KPI引入到终端评价系统中;其次提出了基于信息熵来训练评价系统因子权重.应用该方法,权重可以比基于终端评价系统的经验直接获得的结果更准确、更客观.同时在评...     

基于区间标记判决的稳健垂直切换算法研究

在异构5G网络中,针对切换算法稳健性差引起的切换准确率低的问题,提出一种基于区间标记判决的稳健垂直切换算法.首先,引入中位值平均滤波法,获取更准确的网络参数.其次,基于参数波动特征分析,提出区间标记判决算法,保证候选网络筛选通过率和准确率的同时,提高区间标记判决算法的稳健性.再次,根据移动终端传输层需求,结合终端运动趋势,分别使用不同权值的效用函数获得最佳目标网络.最后,仿真结果表明,该算法能够有效提升切换触发和网络筛选的准确率,降低切换失败率和乒乓效应,提高系统吞吐量,并能够根据移动终端的需求选择最佳目标网络.     

入侵检测中的混合特征选择算法研究

在开放式网络中,高维混合特征的冗余或不相容属性会降低网络入侵检测的效率.为提高入侵检测系统的响应性能,提出一种混合特征选择方法,利用粗糙集形式化描述入侵检测的特征选择,采用信息熵和平均权重分别定义数值型和字符型特征的重要度.算法产生降序特征序列,采用K-means聚类算法评估出优化特征子集.在KDD CUP99数据集上的仿真实验表明,算法有效选择特征子集并缩短了检测时间.     

基于博弈论组合赋权的TOPSIS电能质量综合评估

电能质量综合评估对电网实施有效治理和电力市场改革背景下供需双方进行交易价格的制定至关重要。为使电能质量的评估结果更接近实际,本文提出基于博弈论组合赋权的TOPSIS电能质量综合评估方法。首先根据建立的评价指标体系,采用三标法对传统AHP法进行改进,得到指标主观权重,再使用熵权法求取指标的客观权重;其次引入博弈论思想将主、客观权重进行线性组合,得到指标的最终权重;最后采用改进的TOPSIS算法进行电能质量的综合评估。通过算例验证了方法的可行性。     

基于AHP的靶场测控系统综合性能评估

针对目前测控站维护需求,提出了基于AHP的测控系统性能评估方法,设计并实现了评估系统功能。该方法以自动化测试技术为基础,通过层次模型构建、权重计算和指标量化等关键技术的研究,对系统实战性能进行客观评价。系统应用结果表明,评估方法切实可行。评估结果可为维护策略制定和测控任务实施提供可靠的数据支持。     

基于改进TOPSIS的配用电通信网性能评估方法

针对传统的层次分析法的不足,研究了多指标综合评估系统中指标权重的确定问题,并提出一种基于改进TOPSIS的配用电通信网性能评估方法。该方法将SAW方法、TOPSIS方法与改进的AHP方法相结合对配用电通信网进行综合评估,并针对TOPSIS方法无法对中垂线上的数据进行处理的问题,提出了新的基于相对熵的TOPSIS方法。仿真结果表明,改进的TOPSIS方法更适合对指标敏感的配用电网络进行评估。     

超密集异构无线网络中基于移动轨迹预测的网络切换算法

随着5G技术的广泛应用，网络超密集化部署已成为必然趋势。超密集异构无线网络在实现网络高流量密度、高峰值速率性能的同时，给传统的网络切换算法带来了挑战，处于变速移动的终端会面临更频繁的切换问题，这将导致乒乓效应频率的显著提高，进而影响用户在网体验。针对上述问题，该文提出一种基于终端移动轨迹预测的网络切换算法，适用于各类型用户在高密度无线网络中的垂直切换和水平切换问题。首先，为了更高精度的移动轨迹预测，提出一种基于模糊核聚类和长短期记忆(LSTM)神经网络的预测方法，可以有效预测不同移动模式下用户终端的短时移动轨迹；之后，基于用户当前和预测位置，获取候选网络集合，通过候选集交运算法和指标阈值判断网络切换时机；当切换触发时，使用帝企鹅算法最优化网络选择。仿真结果表明，相比于其他类型的时间序列预测算法，该文提出的轨迹预测算法精度较高；同时相较对比算法，该文所提网络切换算法的切换次数适中，有效避免了乒乓效应，且提高了用户连接的网络质量。     

基于NLB-RS策略的5G+网络终端直通通信安全可靠性分析

为了提高5G+网络终端直通通信的通信质量,文章提出基于最近位置的中继选择策略的5G+网络终端直通通信安全性及可靠性分析。以通信链路保密中断概率和通信中断概率分别作为5G+网络终端直通通信安全性及可靠性的分析指标,对5G+网络终端直通通信过程进行建模,基于最近位置的中继选择策略获取通信过程中的保密中断概率与中断概率,实现5G+网络终端直通通信安全性及可靠性定量分析。实验结果表明,设计方法所得5G+网络终端直通通信安全性及可靠性分析结果与实际情况相符,证实了该方法是正确的。     

5G网络路测分析及应用

随着5G网络的商用化部署,路测是测试及评估5G外场网络性能和功能、分析网络问题的重要方式之一.首先,基于国内5G SA网络外场路测数据,重点分析5G网络的覆盖、业务指标、移动性等基础性能.随后,通过5G网络与终端芯片的互操作测试异常问题,介绍路测在问题定位分析的应用.最后,结合5G网络发展及在垂直领域的应用,提出了5G...     

基于云模型和AHP的网络信息系统可生存性评估

针对当前网络信息系统可生存性评估指标的复杂性和定性概念评估问题,将云模型理论和AHP方法相结合,提出了一种基于云模型的多层次可生存性模糊评估方法。用AHP方法构建了多层次评估指标体系,并对各级指标权重进行有效计算。采用多维云模型与AHP方法结合,设计了定性指标和定性数据的量化模糊评估方法,得到了定性评估结果。实验结果表明,所提出评估方法能够实现复杂评估指标体系下的模糊量化评估,在计算的准确性和模糊性方面具有较好性能。     

Resolution Enhancement Technology:Integrated Process Solutions using OPC

DUV lithography, using the 248 nm wavelength, is a viable manufacturing option for devices with features at 130 nm and less. Given the low kl value of the lithography, integrated process development is a necessary method for achieving acceptable process latitude. The application of assist features for rule based OPC requires the simultaneous optimization of the mask, illumination optics and the resist.Described in this paper are the details involved in optimizing each of these aspects for line and space imaging.A reference pitch is first chosen to determine how the optics will be set. The ideal sigma setting is determined by a simple geometrically derived expression. The inner and outer machine settings are determined, in turn,with the simulation of a figure of merit. The maximum value of the response surface of this FOM occurs at the optimal sigma settings. Experimental confirmation of this is shown in the paper.Assist features are used to modify the aerial image of the more isolated images on the mask. The effect that the diffraction of the scattering bars (SBs) has on the image intensity distribution is explained. Rules for determining the size and placement of SBs are also given.Resist is optimized for use with off-axis illumination and assist features. A general explanation of the material' s effect is discussed along with the affect on the through-pitch bias. The paper culminates with the showing of the lithographic results from the fully optimized system.     

Cost-effective test solutions for smart card and other integrated flash applications

From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test.     

Theoretical analysis of the relationship between the Brillouin gain coefficient and the strain in the optical-fiber sensors

The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.     

An improved parallel thinning algorithm with two subiterations

The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high.     

Novel fiber-optical interferometer with miniaturized probe for in-hole measurements

Today, micro-system technology and the development of new MEMS （Micro-Electro-Mechanical Systems） are emerging rapidly. In order for this development to become a success in the long run, measurement systems have to ensure product quality. Most often, MEMS have to be tested by means of functionality or destructive tests. One reason for this is that there are no suitable systems or sensing probes available which can be used for the measurement of quasi inaccessible features like small holes or cavities. We present a measurement system that could be used for these kinds of measurements. The system combines a fiber optical, miniaturized sensing probe with low-coherence interferometry, so that absolute distance measurements with nanometer accuracy are possible.     

Study of waveguide coupling efficiency in hybrid silicon lasers

This paper presents a new method to increase the waveguide coupling efficiency in hybrid silicon lasers. We find that the propagation constant of the InGaAsP emitting layer can be equal to that of the Si resonant layer through improving the design size of the InP waveguide. The coupling power achieves 42% of the total power in the hybrid lasers when the thickness of the bonding layer is 100 nm. Our result is very close to 50% of the total power reported by Intel when the thickness of the thin bonding layer is less than 5 nm. Therefore, our invariable coupling power technique is simpler than Intel＇s.     

Teleportation of an arbitrary unknown N-qubit entangled state under the controlling of M controllers

A new quantum protocol to teleport an arbitrary unknown N-qubit entangled state from a sender to a fixed receiver under M controllers(M < N) is proposed. The quantum resources required are M non-maximally entangled Greenberger-Home-Zeilinger (GHZ) state and N-M non-maximally entangled Einstein-Podolsky-Rosen (EPR) pairs. The sender performs N generalized Bell-state measurements on the 2N particles. Controllers take M single-particle measurement along x-axis, and the receiver needs to introduce one auxiliary two-level particle to extract quantum information probabilistically with the fidelity unit if controllers cooperate with it.     

Diode-end-pumped Nd:YVO4/LBO lasers with 4.2W continuous-wave output at 457 nm

A continuous-wave (CW) 457 nm blue laser operating at the power of 4.2 W is demonstrated by using a fiber coupled laser diode module pumped Nd: YVO4 and using LBO as the intra-cavity SHG crystal With the optimization of laser cavity and crystal parameters, the laser operates at a very high efficiency. When the pumping power is about 31 W, the output at 457nm reaches 4.2 W, and the optical to optical conversion efficiency is about 13.5% accordingly. The stability of the out putpower is better than 1.2% for 8 h continuously working.     

Call for Papers

正Wireless Body-area Networks The last decade has witnessed the convergence of three giant worlds:electronics,computer science and telecommunications.The next decade should follow this convergence in most of our activities with the generalization of sensor networks.In particular with the progress in medicine,people live longer and the aging of population will push the development of wireless personal networks     

Call for Papers—Feature Topic,Vol.12,No.7,2015

正Information Centric Networking Information-Centric Networking(ICN) is an emerging direction in Future Internet architecture research,gaining significant tractions among academia and industry.Aiming to replace the conventional host-to-host communication model by a data-centric model,ICN treats data content as the first