基于SST89C58型单片机的远程灯控箱系统

以大型场所照明设备的远程控制为目的,介绍基于SST89C58型单片机的远程灯控箱系统的软硬件设计.该系统通过RS-485总线与PC上位机通信,实现远距离、多节点控制.     

基于IAP的单片机软件远程升级

阐述了P89C669单片机的在应用中编程（IAP）技术以及利用IAP技术实现软件远程升级的方法,并着重讨论了单片机远程升级的可靠性。     

进入角约束下的攻击机空间远距引导研究

根据战机远距引导的特点,建立了战机远距引导的三维数学模型,克服了传统二维引导方法实用性不强的缺点;为了实现战机战术上的优势及远距引导的要求,往往需要对远距导引战机进入指定空域时的进入角进行约束,设计了带进入角约束的三维PPN远距引导方法。仿真结果表明该方法能准确引导战机至指定空域,从而保持战术态势上的优势。     

黑龙江省六大本地网新建长途局兼做SSP及STP功能设计方案探讨

简要论述了黑龙江省6大本地网新建长途局的比要性,介绍了长途局兼做智能网业务接入SSP及信令转接STP功能、长途中继电路物分配原则、网同步实施方法及信令组织的方案和原则等。     

ZXJ2000A密码计费系统

本文介绍了 ZXJ2000A 用户交换机密码计费的实现方式,包括系统组成、处理过程、使用方式、管理方式等。     

Long-distance propagation of pseudo-partially coherent Gaussian Schell-model beams in atmospheric turbulence

Propagation properties of spatially pseudo-partially coherent Gaussian Schell-model beams through the atmo- spheric turbulence over a long-distance uplink path are studied by numerical simulation. A linear coordination trans-formation is introduced to overcome the window effect and the loss-of-resolution problem. The beam spreading, beam wandering, and intensity scintillation as functions of turbulence strength, source correlation length, and change frequency of random phase that models the partial coherence of the source are analyzed. It is found that the beam spreading and the intensity scintillation of the partially coherent beam are less affected by the turbulence than those of the coherent one, but it suffers from a more severe diffractive effect, and the change frequency of random phase has no evident influence on it. The beam wandering is insensitive to the variation of source correlation length, and decreases firstly then goes to a fixed value as the change frequency increases.     

General hyperentanglement concentration for polarizationspatial- time-bin multi-photon systems with linear optics

Hyperentanglement has attracted considerable attention recently because of its high-capacity for longdistance quantum communication. In this study, we present a hyperentanglement concentration protocol (hyper-ECP) for nonlocal three-photon systems in the polarization, spatial-mode, and timebin partially hyperentangled Greenberger–Horne–Zeilinger (GHZ) states using the Schmidt projection method. In our hyper-ECP, the three distant parties must perform the parity-check measurements on the polarization, spatial-mode, and time-bin degrees of freedom, respectively, using linear optical elements and Pockels cells, and only two identical nonlocal photon systems are required. This hyper-ECP can be directly extended to the N-photon hyperentangled GHZ states, and the success probability of this general hyper-ECP for a nonlocal N-photon system is the optimal one, regardless of the photon number N.     

LDM长距离显微镜

长距离显微镜破除了只能近距离观测的传统，使微观观测可在高温、高压、有腐蚀气体的环境中进行，可广泛用于材料微观观测、化工、医学、司法鉴定等各个领域，本文着重介绍中科院上海天文台研制成功的ＬＤＭ－Ⅱ型长距离显微镜光学、机械结构特点及各种性能指标，用户正利用其独特的功能从事各种不同领域的工作。     

低慢小飞行物实时检测原理与实验研究

飞鸟撞击飞机与无人机黑飞是威胁航班起降安全的两大隐患,上述的飞鸟和无人机都属于“低慢小”飞行物。为保卫机场净空区的安全,需要研制具有反低慢小功能的预警系统。对此,设计并实现了一套低慢小飞行物实时检测系统,基于FPGA(field programmable gate array)驱动相机阵列实时采集大视场天空视频,将适于硬件操作的奇偶分流算法与帧间差分算法相结合进行运动目标检测,系统帧率达到17帧/s@1 024×768 pixel,平均检测准确率为99.69%。采用千兆以太网、光纤和交换机将前端跑道视频传输至后端塔台指挥中心,支持3 km远距离传输。相比于传统基于软件串行处理的方式,该系统具有高实时性、低功耗与小体积的优势,适合部署在实际应用场景中。     

基于GPRS技术的设备远程监控系统

阐述了一种基于GPRS/GSM网络的远程数据传输方案,以此方案实现了对无人职守设备实施的24 h监控,并对其工作原理进行了探讨。分布于不同地理位置的监测终端借助于GPRS网接入Internet网络与控制中心实现远程数据传输,既担负对监控设备对象的监测,又作为远程终端通过GPRS Modem与控制中心建立起用于传输数据的TCP/IP连接,并通过此连接接收监控中心命令,或者发出设备检测信息数据。系统地分析了ARM7控制器信号采集接口与GPRS MODEM的连接设计,对监控终端工作原理及其控制模块作了分析。