事实上，可以不使用任何线来建立四线电路，例如通过微波、卫星或红外传输系统。
In fact, a four - wire circuit can be established without the use of any wires at all, as in the case with a circuit established over microwave, satellite, or infrared transmission systems.
介绍了一种基于DSP的三相四线制系统混合型电力滤波装置。
A new DSP based hybrid power filter designed under the condition of three-phase four-wire system is presented.
太阳电池组件采用四线连接，以及高速数据采集系统，确保了太阳电池电流测量的准确性。
The solar cell module adopts four-wire connection. It uses high-speed data acquisition system. It ensures the accuracy of the current measurements of the solar cell.
本文主要介绍了一种新型的四线电话语音信箱的系统硬件设计和软件编制。
The hardware and software designs of a four-line telephone voice mail - box system are introduced in this paper.
本文研究的重点是基于四线电阻式触摸屏的在线签名数据采集系统的软硬件设计。
The key point of this paper is the software design and hardware design for on-line signature data acquisition system based on four-line resistance touch panel.
测量系统应该支持四线测量模式。
The measurement system should allow for a four-wire measurement to be made.
通过试验验证，该检测方法能够很好的实现对三相四线制系统中的无功和谐波电流的检测。
The experimental results indicate that this method can be used to detect the reactive power and harmonic current exactly in three-phase four-wire system.
本文主要介绍了一种新型的四线电话语音信箱的系统硬件设计和软件编制。着重介绍在管理四线电话时多任务的处理方法。
The hardware and software designs of a four-line telephone voice mail - box system are introduced in this paper. Also introduced is the multi - task processing.
本文提出了全自动四线喂线机控制系统的设计思路，给出了软件设计和硬件设计原理图。
This paper presented the design idea of control system of a fully automatic four - wire feeding machine and gave the design principles diagram of software and hardware design.
设备是配置为二线制或四线制的系统吗？
另外，三相四线制有源电力滤波器能有效地抑制零线电流，并能有效地解决系统的不对称问题。
Moreover, three-phase four-wire active filters can suppress zero line current, and solve symmetric problem of system effectively.
介绍了在三相四线制供电系统中，中线的作用，断线的危害，以及一种简单可靠的断线保护电路。
The paper introduced the effect of neutral wire the harm of open circuit and a kind of simple credible open circuit protection method.
在三相四线制供电系统中，中性线是非常重要的。
In the Three phase and Four wire circuit system, the neutral wire is very important.
实验结果表明，该装置可对三相四线制系统中的谐波、负序、零序等电流分量进行补偿。
Experimental results prove the proposed control method can compensate the harmonic, negative sequence and zero sequence current components in the three phase four wire.
主要介绍用于三相四线制的有源电力滤波装置的研究工作，给出了系统的基本补偿原理、主电路及控制电路结构，并利用该装置进行了补偿实验。
This paper introduces an active power filter device used for three phase four wire. The compensation principle and structure of main circuit and control circuit are given.
该方法系统结构简单，不仅适用于单相电路，而且也适用于三相四线电路。
The system structure of this algorithm is simple . It not only fits for single-phase circuit, but also for three-phase circuit.
此观测系统可以简单的互联网连接同时监控从一个地方发出的超过256个摄像设备的四线、16轨道的数据。
The station can control and monitor up to 256 cameras from one remote point, with full quad, and 16-channel multisite viewing and simple network connection via Ethernet.
此观测系统可以简单的互联网连接同时监控从一个地方发出的超过256个摄像设备的四线、16轨道的数据。
The station can control and monitor up to 256 cameras from one remote point, with full quad, and 16-channel multisite viewing and simple network connection via Ethernet.
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