机场值机柜台资源的配置研究

为提高机场航站楼值机系统运行效率,以值机系统净收益最大为目标函数,构建相关模型.考虑到当前机场自助值机设备的使用,将人工值机柜台和自助值机设备两种值机方式一并考虑,进行资源的配置研究.首先通过MATLAB对满足约束的可选值机柜台开放数量进行求解,得到适宜的值机工作人员繁忙概率区间;其次通过设计的模拟退火算法,运用MAT?LAB进行实例求解,得到最大的值机系统净收益,进而得到相应的值机柜台分配数量.通过将求得结果与启发式算法所求结果进行对比分析,表明本文分配算法在大幅减少运算时间时,也提高了值机资源的分配效率,对提高机场值机柜台的资源配置具有一定的参考价值.     

Triggered lightning testing of an airport runway lighting system

The interaction of rocket-triggered lightning with an airport runway lighting system has been studied. The lighting system included a buried counterpoise with attached vertical ground rods for protection of the series lighting cable from lightning. Experimental data for voltages and currents at various locations in the runway lighting system due to direct lightning strikes are presented along with the causative lightning current. The data include the first measurements of the responses of an underground bare conductor (counterpoise) to direct lightning strikes. These measurements can serve as ground truth for the testing of the validity of various counterpoise models.     

基于VR技术的智能变电站运行仿真培训系统

为了更加真实、直观地呈现智能变电站的运行整体结构,构建基于VR技术的智能变电站运行仿真培训系统.该系统通过5个模块协同完成智能变电站运行仿真培训,结合实际变电站的设备情况,采用二维纹理映射方法完成变电站设备仿真建模;系统利用虚拟现实交互模块呈现培训场景,参与培训人员能够通过人机交互设备,实现场景漫游和相关培训内容操作....     

Intelligent scheduling and planning systems for telecommunications resource management

This paper discusses the importance of resource management in the telecommunications industry. It argues for intelligent resource management systems (IRMSs) that are capable of providing flexible and dynamic resource management. It introduces the main requirements and benefits of an IRMS and describes the technical basis of current research activities which are leading towards the development of constraint technology based IRMS platforms.     

Joint model of user check-in activities for point-of-interest recommendation

With the rapid development of location-based networks, point-of-interest(POI) recommendation has become an important means to help people discover interesting and attractive locations, especially when users travel out of town. However, because users only check-in interaction is highly sparse, which creates a big challenge for POI recommendation. To tackle this challenge, we propose a joint probabilistic generative model called geographical temporal social content popularity(GTSCP) to imitate user check-in activities in a process of decision making, which effectively integrates the geographical influence, temporal effect, social correlation, content information and popularity impact factors to overcome the data sparsity, especially for out-of-town users. Our proposed the GTSCP supports two recommendation scenarios in a joint model, i.e., home-town recommendation and out-of-town recommendation. Experimental results show that GTSCP achieves significantly superior recommendation quality compared to other state-of-the-art POI recommendation techniques.     

基于微处理器的教室智能用电管理系统

随着国内高校规模的不断扩大,高校教学楼数量激增,相应的电费支出已经非常庞大。但事实上,高校教学楼在用电方面却存在诸多问题,体现为电能的巨大浪费,这必须引起足够的重视。针对大学教室在用电管理方面存在的不足,设计了一种教室智能用电管理模拟系统。本系统采用单片机STC89C52作为核心部件,运用红外感应计数以及单片机之间的无线通信,能有效地对教室进行合理的用电管理,实用性强。     

一种适用于机场场面监视MLAT系统的状态模型

根据直角坐标系的目标运动模型和无源多点时差定位系统(MLAT)的特点,推导出了一种到达时间差（TDOA)状态模型方程,并基于该模型方程,设计了一种TDOA跟踪滤波器。与传统TDOA状态模型方程相比,所推导出的状态模型方程和滤波器不但能提高TDOA的估计精度,还可更有效地消除非视距（NLOS）成分。仿真和实测数据证实了所推导状态模型方程和所设计跟踪滤波器的有效性。     

机场用飞机起降电视跟踪系统

介绍了一种新的机场用飞机起降电视自动跟踪系统的构成和工作原理，给出了系统主要技术指标，并分析了实现主要技术指标的设计依据，还阐述了自主研制的智能电视跟踪器这一系统核心设备的硬件结构和算法流程。     

机场跑道异物检测系统研究

为了解决机场跑道上的异物对飞机安全造成的极大威胁,在研究了国外现有的跑道异物检测技术的基础上,提出了易于实现的组合式毫米波探测系统及机场布局方法,分析了地杂波对跑道异物检测的影响,采用高距离与方位分辨探测技术实现对地面杂波的抑制,提出了超宽带毫米波线性调频探测单元的构成方法并对高分辨测距的基本原理和实现算法进行了理论分析.针对探测单元以及环境杂波的分布模型进行了仿真研究,仿真结果表明组合式毫米波探测系统对小目标具有较好的分辨能力.     

Development of an FPGA-based system for real-time simulation of photovoltaic modules

Photovoltaic (PV) simulators are indispensable for the operational evaluation of PV energy production system components (e.g. battery chargers, DC/AC inverters, etc.), in order to avoid the time-consuming and expensive field-testing process. In this paper, the development of a novel real-time PV simulator based on Field Programmable Gate Arrays (FPGAs), is presented. The proposed system consists of a Buck-type DC/DC power converter, which is controlled by an FPGA-based unit using the Pulse Width Modulation (PWM) principle. The system operator is able to define both the PV module type to be simulated and the environmental conditions under which the selected PV module operates. The proposed design method enhances the rapid system prototyping capability and enables the reduction of the power converter size and cost due to the high clock speed feature of the FPGA-based control unit. The experimental results indicate that, using the proposed method, the PV module current-voltage characteristics examined are reproduced with an average accuracy of 1.03%.     

一种智能化输液监控管理系统

介绍了一种医用输液监控管理系统,该系统包括一台输液中心管理PC机、一个输液中心管理器、多个输液监控器、多个护士手持终端和多个中继站。输液监控器利用红外光电传感器检测输液液位和滴速信息,通过无线方式发送至中继站,中继站再将信息转发至输液中心管理器,输液中心管理器将信息集中处理后分发至在线护士手持终端机,并调度处于空闲的护士处理报警,同时通过上位机将数据上传至输液中心管理PC机进行可视化的管理。该系统具有无线接收患者输液和报警信息,统一分配信息,智能调度护士和输液信息集中管理等优势。     

Intelligent antenna system for cdma2000

Third-generation (3G) cellular code division multiple access (CDMA,) systems can provide an increase in capacity for system operators over existing second-generation (CDMA) systems. The gain in capacity for the base station to mobile (forward) link can be attributed to improvements in coding techniques, fast power control, and transmit diversity techniques. Additional gains in the mobile to base station (reverse) link can be attributed to the use of coherent quadrature phase shift keyed (QPSK) modulation and better coding techniques. While these enhancements can improve the performance of the system, system operators expect that with increased demand for data services, even greater capacity enhancements may be desired. There are essentially three methods, which we describe, based on diversity, spatial beamforming, and a combination of diversity and beamforming, to improve the performance of system through the use of additional antennas at the base station transmitter and receiver. The performance improvements are a function of the antenna spacings and the algorithms used to weight the antenna signals. We focus on the possibilities for the cdma2000 3G system that do not require standards changes. We highlight the performance enhancements that can be obtained on both the reverse and forward links through use of an antenna array architecture that supports a combination of beamforming and transmit diversity. We focus on the performance enhancements for the forward link     

影院智能消防控制系统设计

为了减少影院发生火灾后产生的不良后果,本文设计了基于单片机STM32为主控芯片的智能消防控制系统.该系统搭载了火焰探测模块、温度检测模块、烟雾浓度检测模块以及消防随动模块,组成了一个可以监测影院环境,并在火灾发生后迅速启动灭火装置和消防随动装置.实验结果表明,该系统在火灾发生后动作迅速、稳定性强.     

机场地面移动目标监测系统优化

针对机场地面移动目标位置监测系统缺乏统一有效组网方案的问题,在现有的AeroMACS通信技术的基础上,提出了一种对通信协议进行优化的方案,对原有系统中各移动节点的通信方式和上下行链路的资源分配方案做了调整。通过系统分析与NS-3软件建立场景仿真,结果表明文中提出的系统在通信时延与系统容量方面均优于原有系统,可有效改善机场地面移动目标监测系统的网络性能。     

Digital simulation of an automotive multiplexing wiring system

A digital simulator for an automotive multiplexing system has been developed and tested. The basic architecture and logical flow and block diagrams are described. Some results of the simulation are given. The contention scheme was found to work successfully in the simulator, and the outputs were found to be ordered in the same manner as expected by the requirements of the protocol. The network traffic and its effect on the latency index has also been studied. The simulator has provisions to incorporate alternate message retrial schemes and to test alternative strategies of the tasks. It is flexible enough so that the effects of noise and other nonideal phenomena can be incorporated. It is concluded that this simulator is a useful design/development tool due to its flexibility in testing alternative design strategies     

机场贵宾服务系统的设计与实现

针对当前的机场服务系统中贵宾客户的服务平台不够完整的情况,对在线客户服务平台做了改进,将传统的J2EE的四层结构的变成五层,在业务逻辑和数据库之间加入数据持久层,使得贵宾客户在这样的平台上可以享受到通信运营商提供的优质服务,也可以自助服务.此举很好的吸引了高端客户,为通信运营商的利润和品牌价值的延伸提供了保障.     

机场跑道异物检测系统设计与研究

对机场跑道异物FOD（foreign object debris）快速精确的检测与告警已经成为保障飞机飞行安全急需解决的重大问题,一个有效的智能机场跑道安全检测系统是机场飞行安全保障体系应有的组成部分。依据FAA对FOD检测系统的性能要求,借鉴国外现有探测系统,提出了一种新的跑道安全检测系统方案,重点分析FOD探测系统中毫米波雷达、光学系统的关键技术及其他系统间的数据交互定义,并开展了系统软件界面设计。系统最终可以对FOD全天时、全天候、全自动的检测,具有异物分类识别及告警能力,可以有效的预防和降低跑道异物对机场跑道安全的威胁。     

Intelligent antenna solutions for UMTS: algorithms and simulation results

This article outlines the development of intelligent antenna (IA) solutions for UMTS, a third-generation W-CDMA system. Since the selection of an antenna configuration paired with realizable uplink/downlink algorithms that can satisfy all operating environments is a broad task, this article focus is on cost-effective antenna arrays for macrocells. Algorithms that exploit the antenna configurations and act at both the physical and MAC layers are highlighted and supported by simulation results. Two solutions stand out for UMTS: a universal beamforming algorithm that unifies user-specific and fixed beamforming under one framework, and multibeam scheduling (MBS) that significantly increases downlink packet data throughput using the concept of code reuse in conjunction with beamforming. The article summarizes the critical issues that were faced in the development of an IA solution capable of delivering the theoretically promised benefits to end users.     

基于QoS保证的多用户OFDM系统跨层资源分配

针对正交频分复用(OFDM)系统资源分配和调度问题,提出一种基于第三代移动通信长期演进(LTE)系统的分块跨层资源分配算法。此算法考虑物理层的信道状态信息、媒体接入层(MAC)的有限用户缓存队列长度、用户的丢失率和时延等QoS要求,以提高系统频谱效率为总体目标。通过从实时视频业务和混合业务两种业务类型下进行大量对比分析,得出提出的算法能有效提高系统的频谱效率和降低系统时延。     

认知无线电系统的顽健资源分配算法

摘 要：针对多用户下垫式认知无线电网络中参数不确定性问题,提出了一种顽健分布式功率控制算法。在干扰温度门限和次用户信干噪比（SINR）的约束下,考虑信道不确定性,实现认知系统功率消耗最小化。基于欧几里得球形不确定性描述,利用拉格朗日对偶分解理论给出了顽健功率控制问题的解。仿真结果表明,该顽健功率分配算法能同时满足主用户和次用户的QoS需求,与非顽健算法和传统SOCP算法对比可提升系统性能。