如果他们在系统布防时发现了什么问题，就会向基站发送无线警报信号，然后基站会发出警报。
If they detect something wrong while the system is armed, they'll transmit a wireless alert signal to a base station that will then raise the alarm.
然而，这种纯粹的视觉系统在恶劣天气下毫无用处，到了20世纪30年代，无线电通信开始用于空中交通管制。
However, this purely visual system was useless in bad weather, and, by the 1930s, radio communication was coming into use for ATC.
在20世纪40年代，空中交通管制中心能够而且确实利用了第二次世界大战中新研制的雷达和改进的无线电通讯，但是这个系统还处于初级阶段。
In the 1940s, ATC centres could and did take advantage of the newly developed radar and improved radio communication brought about by the Second World War, but the system remained rudimentary.
Isanti县计划在五月切换到800兆赫兹无线电系统。
Isanti County is scheduled to make the switch to the 800 mega hertz radio system in May.
该系统将每个士兵无线连接到其他人、指挥官和其他野外设备。
The systems wirelessly connect soldiers to each other, their commanders and other devices in the field.
如果要在消毒过的医院环境之外使用这个系统，那么就必须开发无线通信。
Wireless communication must be developed if the system is to work outside the sterile conditions of a hospital.
有线系统当然也可以做到这一点，但无线技术所需的安装费用更低，也更加灵活。
This could also be done through a wired system, but wireless technology offers lower installation costs and greater flexibility.
然而，在几种特定的情形下您可能需要驱动无线负荷，理解系统性能特性。
However, in several situations there is a requirement to drive wireless load, to understand system performance characteristics.
它也必须能够复制商业和战术无线系统。
It must also replicate commercial and tactical wireless systems.
无线交易可以使用外部系统来收集数据。
Wireless trading may employ external systems to gather data.
这需要的是一种利用低频无线电波的系统。
What is needed is a system that USES low-frequency radio waves.
AGT公司将为该计划提供集成陆地移动无线解决方案和视频会议系统。
AGT will provide the integrated land mobile radio solution as well as video teleconferencing systems for the program.
其他无线系统也被植入人体。
对针对无线感应器网络的系统而言，这是一项重要的特性。
That's an important feature for any system targeted toward wireless sensor networks.
他相信这一系统最终可以不用任何导线，从而完全实现对心脏的无线调控。
Eventually, Mr Diston believes, the system may be able to do away with leads altogether, for totally wireless heart control.
第二名是智能薄膜，这是对怀孕风险高的女性设计的一种无线系统。
Second place went to Smart Diaphragm, a wireless system for women with high-risk pregnancies.
整个GPS系统，包括电池和供下载数据的无线发射机，比硬币还小。
Entire GPS systems, including batteries and wireless transmitters for downloading data, are now no bigger than a coin.
无线系统的扩散对频段的需求并增加了其价值。
The proliferation of wireless systems has pushed up the demand for spectrum and increased its value.
有别于许多技能培训师，COMBATREDI是一种无线用户佩戴系统。
As opposed to many skills trainers, COMBATREDI is a tetherless, user-worn system.
只要其物理无线网卡存在，STA网卡就一直存在于系统中。
The STA adapter is always in the system as long as the corresponding wireless physical adapter is present.
该无线电系统还可扩展频率范围，提供低频段甚高频。
The radio also has an extended range that provides access to low-band VHF.
这种无线谐振电能传输系统——FREE - D是通过电磁感应传输能量的。
The Free-Range Resonant Electrical Energy Delivery System, or FREE-D, is powered by induction.
除了推出新型无线电系统以外，哈里斯公司宣布增强RF- 7800 V系列软件无线电的软件性能。
In addition to the new radio, Harris announced software enhancements to the RF-7800V family of software defined radios.
只要它已启用，在系统还未调用无线承载网络之前，它就是STA网卡。
If the wireless Hosted Network is enabled, it is the STA adapter when the wireless Hosted Network has never been invoked in the system.
他可以从一些无线的安全电视摄像机中看回访图像，或用无线id系统将办公室上锁，该系统可记录进入人员及其去向与时间。
He reviews images from security cameras, some of which are wireless, and then locks an office with keys using a wireless ID system that records who enters where and when.
从支持无线访问的桌面机和服务器到无线接入系统，它正成为几乎所有一切的通用工具，而且已经在无线解决方案中占据了一席之地。
It's becoming the universal tool for almost everything, and it has found its place in wireless solutions, from desktops and servers with wireless access to access point systems.
另外，通用动力公司在联合战术无线电系统(JTRS)计划下，正在通过无线电开发用于未来的MUOS用户进入终端波形软件库。
Additionally, General Dynamics is developing the MUOS User Entry Terminal Waveform software library for future use by radios being developed under the Joint Tactical radio System (JTRS) program.
其他待售的应用包括无线家庭安全系统和无线信标——让水手在有人落水时用其通知全体船员。
Other applications now on sale include wireless home-security systems and wireless beacons for sailors to tell the crew when someone has fallen overboard.
更理想的无线充电系统应该脱离装置的束缚，就像无线保真和蓝牙技术，只要是对应的设备就不需要专用的适配器。
In an ideal world, the wireless recharging system would work, out of the box, like Wi-Fi and Bluetooth devices-with any approved gadget and requiring no special adaptors.
起搏器就是基于无线系统维持稳定心跳，超声波与X -光都用到了无线技术。
Pacemakers rely on a basic wireless system to set a stable heartbeat. Ultrasound and X-ray technologies are wireless.
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