光因特网管理技术研究

随着Internet的迅速普及,以IP为主的业务在飞速增长,未来的网络将要应付这种不断增长的IP业务,光因特网是未来Internet的发展方向。对光因特网的管理技术进行了研究,讨论了基于策略和基于SNMP的网络管理的原理和实现方式。     

IP电话终端卡的试验研究

在对VoIP应用要求进行分析的基础上,介绍了一种IP电话终端卡的软硬件设计方案,详细介绍了硬件电路与软件编程方法,并作了局部仿真试验。该方案降低了成本,操作简便。     

基于中国知网的对于《现代电子技术》网络传播情况的分析

以中国知网2005年1月1日~2007年12月28日的网络传播统计数据为基础,定量分析《现代电子技术》的网络传播情况,为其进一步发展提供理论依据。2005~2007年该刊原文下载频次、题录摘要浏览数及网络访问量等各项网络传播指标都呈逐年上升趋势,其访问量在中国学术期刊体系及自然科学类期刊体系中均位居前列,访问用户遍及亚洲、欧洲、北美洲、大洋洲和非洲,来自中国的院校类用户访问量占绝大多数。2000年以后期刊的学术影响力与社会影响力都有巨大提升,值得注意的是这种影响力在2000年以后尤为显著。内容上应顺应电子技术领域的热点与焦点,保持计算机软件及计算机应用类文献在数量上的绝对优势,适当增加自动化技术与电信技术这两个专题的文献量,控制无线电电子学与计算机硬件技术这两个专题的文献质量与数量。发行上应加强对中国访问量最大的10个地区的发行工作。     

Bursting-like motion induced by time-varying delay in an internet congestion control model

Time delay is an important parameter in the problem of internet congestion control. According to some researches, time delay is not always constant and can be viewed as a periodic function of time for some cases. In this work, an internet congestion control model is considered to study the time-varying delay induced bursting-like motion, which consists of a rapid oscillation burst and quiescent steady state. Then, for the system with periodic delay of small amplitude and low frequency, the method of multiple scales is employed to obtain the amplitude of the oscillation. Based on the expression of the asymptotic solution, it can be found that the relative length of the steady state increases with amplitude of the variation of time delay and decreases with frequency of the variation of time delay. Finally, an effective method to control the bursting-like motion is proposed by introducing a periodic gain parameter with appropriate amplitude. Theoretical results are in agreement with that from numerical method.     

Schlüsseltechnologien künftiger Kommunikationsnetze

The goal of infrastructures of modern communication networks is a seamless operation in a heterogeneous environment of network technologies by using a high degree of network intelligence and integrated network management. The contribution describes the features of the key network technologies and addresses basic trends of their future evolution.     

试论手工雪茄卷制工厂的智能制造改造

智能制造已经成为全球性的制造业进步的风潮,手卷雪茄的加工周期长,手工工艺复杂,手工作业很难被机械化替代。在手卷雪茄如何实现智能制造,制造的柔性、订单的响应及时性、人力调度优化和生产计划的科学性如何保证,是一个有行业代表性的命题。利用CPS概念,全面规划和改造雪茄烟的智能制造实践,通过物料标识全面应用物联网采集,实现手工为主的作业的数字化车间和数字化工厂。     

Smart antenna design for high‐speed moving vehicles with minimum return loss

The Internet of Things (IoT) is a connection amongst people and applications to another dimension of machine‐to‐machine communication. IoT scenario is unequivocally related with the development of the advancement of wireless sensor systems (WSNs) and radio‐frequency identification (RFID) frameworks. Owing to the technological advances around the world, energy demand is increasing exponentially. Energy proficiency has turned out to be one of the real worries in the present life that essentially influence every single human action. In communication system, return loss is a major issue for transmission process. Owing to return loss, a huge amount of power consumption occurs. This phenomenon is contemporary with transmission process, and it will initiate a serious problem for high‐speed moving substance like aircraft, rockets, and spaceship. To overcome this problem, a four‐element cylindrical antenna (conformal) array with better axial radiation is proposed. The four U‐shaped slots are uniformly wrapped around on a cylindrical surface, which produces tilted radiation. To enhance the axial radiation, four conformal elements are reefed by a one‐ to four‐microstrip feed network. The proposed conformal design has a bandwidth of 200 MHz (narrow bandwidth) at the center frequency of 3.9 GHz, covering the range of 3 to 3.9 GHz, with the gain of 4.9 dBic, and can be suitable for unmanned aerial vehicles (UAV), wireless avionics intra‐communication (WAIC), and so forth. The proposed design is low profile and can be used for high‐speed avionic applications. Finally, machine learning technique is explored to design a model for a smart antenna with optimistic parameters to reduce return loss and enhance the transmission rate.     

Analysis and modeling of Internet backbone traffic with 5G/B5G

The effects that the 5th generation mobile network (5G) bring to Internet backbone were investigated qualitatively and quantitatively.First,the challenges that the characteristics of 5G,i.e.ultra-high data rate,ultra-low latency,and ultra-large number of connections,introduce to Internet backbone in terms of traffic,latency,and security were analyzed.Second,a model was proposed to capture the characteristics of 5G users and Internet traffic with the coordination of 5G,edge computing,and cloud computing.Then,numerical simulations were used to evaluate the model.The QoS requirements that Internet backbone faces under different extent of 5G deployment were evaluated.According to the study,increment of backbone traffic,increment of the ratio of propagation delay,and movement of bandwidth bottleneck are predicted after 5G/B5G deployment.     

智能网联汽车发展中的法律政策研究

在智能网联汽车技术和产业发展快速发展的背景下,介绍了国际上发达国家和地区在推进自动驾驶方面的法规政策,并从宏观指导、微观制度以及地方政策梳理了国内法规政策现状,在此基础上阐述了我国智能网联汽车发展中在法律政策方面遇到的问题,最后提出三方面的立法建议:一是平衡好技术发展与国家安全,二是平衡好信息网络安全之间的关系,三是做好立法科学统筹与部分法律法规优先出台。     

物联网技术下的智能家居远程无线监控系统设计探讨

由于当前新技术不断发展,人们的生活得到越来越好的服务.其中在网络技术的帮助下,当前的智能家居可以实现远程监控,这就更好地满足了用户的实际要求,同时也是智能家居今后重要的发展方向.因此,本文重点分析物联网技术支持下智能家居实施远程、无线监控的系统,有效连结了用户和生活的实际需求,进而可以更好地克服传统安装服务器和依赖IP地址所存在的弊端,并且还有效地提升了安全度.