In this paper, methods are given to glove quality factor problems and quality factor is given precisely. In parallel L-C network circuit.

本文分析了一些常见电路的品质因数及其计算方法，并得出了实际电感、电容并联网络品质因数的精确结果。

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Central air conditioner, automatic fire alarm, closed circuit TV watching system, communication network, public broadcasting and cable TV are all available in the exhibition hall.

展览大厅配有中央空调、自动火警、闭路电视、通讯网络、广播和有线电视。

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In addition, the transport layer allows IMS devices to make and receive calls to and from the PSTN network or other circuit-switched networks via the PSTN gateway.

此外，传输层允许IMS设备通过PSTN网关呼叫PSTN网络或其他电路交换网络和接收来自这些网络的呼叫。

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Security in the capital, protected by a network of close circuit cameras and tens of thousands of police officers and private security guards, is not likely to deteriorate any time soon.

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They then analyze how the remaining major cost components, switching and transmission for both types of networks and interconnecting with the switched circuit network for the IP-based networks, change with the change in technology.

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However, VOIP differs from the usual phone services in that it sends calls as digital packets of information over data networks rather than relying on a dedicated circuit-switched network.

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