含电动汽车的光/储/燃充电站最优容量配置及经济性分析

针对城市居民区充电难状况,建立一种包含光伏电池、燃料电池和储能蓄电池的电动汽车充电站容量配置模型。以成本最小化和负荷方差最小化为目标,采用NSGA-Ⅱ(二代非支配排序遗传算法)对模型进行求解。对于求得的可行解,首先使用净现值法对部分解进行经济性评估,然后采取峰谷负荷差率进行进一步评估,经过两轮筛选得出最优解。仿真算例验证了模型及评估方法的可行性。     

海上无线网状网中基于Q-Learning的自适应路由算法

针对海上无线网状网通信环境复杂多变、船舶节点具有特殊移动模型等特点，提出一种基于Q-Learning的自适应路由（Q-Learning Based Adaptive Routing，QLAR）算法。综合考虑海上无线电波传播特性、船舶航程信息以及相应海区气象信息等因素的影响，提出链路可靠性、链路稳定性和节点航程相似度等概念，并对链路状态进行评估；然后，根据链路状态评估结果，利用Q-Learning算法寻找源、目的节点间最稳定的路径以传输数据分组；最后，利用OPNET搭建仿真平台对算法进行测试。仿真结果表明，与4种对比算法中性能最优的算法相比，QLAR算法最高可提升分组投递率4.89%，降低平均分组时延17.42%，减少归一化路由开销21.99%。     

Modeling electric taxis' charging behavior using real-world data

Charging behavior is critical to the development and deployment of electric vehicle (EV) systems, given its impacts in EV adoption, the energy and environmental performance of EVs, potential load change to the electric grid, etc. However, the general characteristics of practical charging behavior have not been well studied. Existing studies are mostly based on travel data from conventional internal combustion engine vehicles, modeled with assumed and simplified charging scenarios. The use of public charging infrastructure is often neglected. Few studies evaluate real-world charging behaviors of EVs currently in operation using public charging stations. To address this gap, this study analyzes the data of 39,372 charging events from 129 unique electric taxis in Shenzhen, China to study the distributions of daily charging frequency, charging start time, and charging duration. The insights we learned from this study are: 1) the daily frequency for a vehicle to visit charging stations is unlikely to exceed five times; 2) the distribution of charging start time have multiple peaks and can be fitted with Gaussian Mixture Models; 3) charging duration is influenced by charging start time; and 4) charging dynamics can be modeled using the distributions of daily charging frequency, charging start time, and charging duration. Results from this study can inform charging behavior modeling for EVs and charging infrastructure development.     

WIND-FLEX--一种新型的高速无线网络接口技术

WIND-FLEX是一种新型的 17GHz无线网络接口技术,具有高数据速率、高空间效率、灵活的设计、动态自适应和可配置等特点,能在时变信道条件下动态优化系统性能、有效载荷和QoS需求。文中首先介绍了 17GHz频带的管理状况和信道特点,然后分析了WIND-FLEX系统结构和网络结构,最后探讨了它的应用实例。     

800 MHz射频频率合成器的设计及相位噪声性能分析

介绍了3．5GHz宽带无线固定接入系统射频接收机中800MHz频率合成器的设计，讨论了环路滤波器以及压控振荡器等环路部件对频率合成器输出信号相位噪声性能的影响，提出了低相位噪声频率合成器的设计方法。最后结合实际系统分析了本振信号相位噪声对基带接收机16QAM解调误码性能的影响，并给出计算机仿真的结果。     

The impact of transport on social exclusion processes with specific emphasis on road user charging

This paper looks at the ways in which transport can impact on social exclusion processes by examining how the introduction of road user charging may affect residents of Bristol. It gives an overview of the concept of transport and social inclusion/exclusion, describes key themes emerging from DfT-funded research conducted in the city and reflects on the importance of consideration of these themes to the policy's successful implementation. By exploring road user charging from both collective and individual perspectives, the paper illustrates how this congestion charging policy could promote social inclusion.     

Cross ownership of wireline and wireless communications carriers: synergy or collusion?

This paper examines whether the ‘cross ownership’ of wireline and wireless communications carriers is socially beneficial or harmful, and therefore should be allowed or regulated. We analyze a generic model of cross ownership of the firms which produce different but inter-related services. We show that, first, if both of the wireline and wireless industries are monopolistic, cross ownership results in social gains when the two services are complements, and social losses when they are substitutes. Secondly, if the wireless industry is sufficiently competitive, there’s little or no welfare loss from cross ownership. Finally, we briefly address the effect of network externality on the welfare consequences of cross ownership.     

基于RFID＋WLAN技术的野战仓库物资可视管理研究

利用射频识别、无线局域网及相关技术,设计野战仓库物资可视管理框架和流程,以实现物资的科学维护与管理,提高物资保障效率。     

仓储物流中UWB技术的应用

作为一种无线通信技术,UWB技术因其自身所具有的高速、低成本和低功耗等优势而成为未来无线定位技术的热点。基于UWB技术的Ubisense7000定位系统是Ubisense公司推出的第一个民用精密实时无线定位系统,其3D定位精度可达到15cm左右。文中简述了UWB技术的基本概念,给出了Ubisense7000定位系统在仓储物流中的应用实例,并预测了UWB技术在仓储物流中的发展趋势。     

无线遥测遥控接口的研究

利用无线通信网 (如 GSM网 )的特点 ,进行了无线遥测遥控接口装置的研究。该接口将通信网信令变成控制接口装置的信号 ,以此来建立监控中心与接口装置之间的通信链接和数据传输 ,并规定了数据传输的分组格式。它能根据用户或集团公司的实际用途 ,与相应的数据采集或监控设备配合 ,达到遥测遥控的目的。