针对林火火情复杂、容易导致扑救人员伤亡的情况，基于GPS（Global Positioning System，全球定位系统）技术、嵌入式系统开发技术和GIS（Geographic Information System，地理信息系统）开发技术，研究并开发出林火扑救队伍跟踪及护林员巡护监督系统。该系统由两部分组成，一是扑火队伍和护林员随身携带的前端跟踪器，它能实时精确地采集扑火队伍的位置，并将编号等其他信息组帧后，通过GSM（Global System for Mobile Communication，全球移动通信系统）网络的SMS（Short Message Service，短消息服务）通道回传；二是后台跟踪监督管理系统，通过回传的数据，在地形图、遥感图像等底图上生成扑火队伍和护林员的位置标记及活动轨迹。最终形成的系统可为扑火指挥人员和林区日常管理人员提供准确的信息参考。该系统解决了以往设计方法中跟踪器通信距离短或不稳定、可携带性差等问题，同时在后台跟踪监督管理系统中设置了电子围栏功能，为实现扑火队伍的自动安全警示、对林区日常巡护工作的自动监督提供一种方法。

In response to the fact that complex forest fire can easily lead to casualties and injuries of fire suppression personnel, the fire suppression team tracking and ranger patrol supervision system has been under research and realized, based on the GPS (Global Positioning System) technology, the embedded system technology and GIS (Geographic Information System) technology development. The system consists of two parts. The first part is the front-end tracker that fire suppression team and rangers keep with. It can accurately in real time collect positions of the fire suppression team. After framing other information including serial numbers, it feeds back the information through the SMS(Short Message Service) of the GSM (Global System for Mobile Communication) network. The second part is the back tracking and supervision management system. It can generate the location markers and trajectory of their activities in base maps including topographic maps, remote sensing images, and ot

全球移动通信系统(GSM)无源探测系统中的强直达波干扰(DPI)抑制技术研究是当前一项艰巨而又极具挑战性的课题,已成为能否实现无源探测的关键。依据GSM信号下行链路导频信号的特点以及直达波的抑制要求,在空域采用了线性约束最小方差(LCMV)准则下的自适应波束形成与宽零陷相结合的空域抑制算法。理论分析和仿真结果均表明基于GSM的无源探测系统在此算法下可获得不低于55 dB的直达波干扰抑制。

At present,the research of direct path interference (DPI) suppression technology in passive detection system based on global system for mobile communication(GSM)is difficult and challenging,which is directly related to the realization of the passive detection. According to the features of the GSM downlink pilot signal and the DPI suppression requirement,a spa-tial filtering algorithm based on the direction information and a least square null constraint optimization is proposed. Theoretical analysis and simulation results show that the GSM-based passive detection system can achieve DPI suppression at least 55 dB by using the proposed algorithm.

介绍了一稳定可靠的地震台站无线远程监控及3G备用信道方案的实现,其是基于GSM(全球移动通信系统)网络3G(第三代移动通信技术)和SMS(短信业务)的方案。当有线信道出现故障时,中心人员可通过SMS(短信业务)指令对其控制切换并启动无线备用信道,当有线信道恢复后,通过指令关闭无线信道并切换至有线信道进行地震数据传输。具有通过3G无线传输测震数据的功能。

This paper introduces the realization of the seismic station’s stable and reliable wireless remote monitoring and 3G backup channel scheme, which is based on GSM ( Global System for mobile communication) , 3G ( third generation mobile communication technology) and SMS ( short message service) . When the wire channel has failure, center staff can control the switch and start the wireless backup channel through the SMS (short message service) instruction. When the wire channel recovery, we can turn off the wireless channel and switch to wire channel which transmit the seismic data.

利用枝节加载开环多模谐振器和非对称耦合线，设计了一种紧凑型三通带带通滤波器.该多模谐振器在通带内能产生3个奇模和3个偶模.运用奇偶模理论对该谐振器的特性进行分析，其通带边缘的多个传输零点，可显著提高滤波器的选择性和阻带特性，且通过调节非对称耦合线位置，还可以实现对传输零点的有效调控.该滤波器可应用于全球移动通信系统 GSM、全球定位系统和数字蜂窝系统 DCS.

A compact tri-band bandpass filter(BPF)using stub-loaded open-loop multi-mode resonator and asym-metric coupling lines has been presented. The multi-mode resonator can generate three odd modes and three even modes in the desired passband. Odd-even mode theory has been used to analyze the characteristics of the resonator, there are several transmission zeros(TZ)near the passband edge,and they can improve selectivity and stopband suppression. Meanwhile,transmission zeros can be controlled by tuning the asymmetric coupling lines. The filter has been applied for GSM,GPS and DCS.

跌倒是造成世界上意外伤害死亡的第二大原因,如何预防跌倒已成为保障老人生命的关键。目前常见"跌倒报警器"的传感模块一般采用单一的三轴加速度计,测量精度受限,仅能实现人体跌倒后的报警功能而不能实现跌倒前的预警。文章设计并实现了一种基于MEMS惯性传感单元的防跌倒预警器,率先设计了含"三轴加速度计+三轴陀螺仪+三轴磁力计"的高精度多模态传感模块,内嵌跌倒预警算法,并通过蜂鸣器和振动器警示。对九名健康年轻实验对象进行了总计81次的跌倒实验,系统结合基于阈值的跌倒预警算法,结果表明,其检测灵敏度可达98.61%且特异度为98.61%,平均预警时间为300 ms。未来研究将嵌入全球移动通信系统(Global System For Mobile,GSM)、全球定位系统(Global Positioning System,GPS)等电路模块功能及配备穿戴式安全气囊,有望在易跌人群中实现实时防护和及时救治。

Falls are the second leading cause of unintentional injury deaths worldwide, so how to prevent falls has become a safety and security problem for elderly people. At present, because the sensing modules of most fall alarms generally only integrate the single 3-axis accelerometer, the measurement accuracy of sensing signals is limited. They can only achieve the alarm of post-fall detection but not the early pre-impact fall recognition in real fall applications. Therefore, an early pre-impact fall alarm system based on high-precision inertial sensing units was studied and developed in this paper. A multi-modality sensing module embedded with the fall detection algorithm was developed for the early pre-impact fall detection. The module included a 3-axis accelerometer, a 3-axis gyroscope and a 3-axis magnetometer, which could arouse early pre-impact fall warnings by a buzzer and a vibrator. Total 81 times of fall experiments from 9 healthy subjects were conducted in simulated fall condition