无源系统

Passive intermodulation interference in communication satellite system is analyzed and calculated.

分析和计算了通信卫星系统中的无源互调干扰。

Passive Intermodulation Properties of mobile communication antenna is discussed.

分析了移动通信系统中的无源互调干扰。

Passive intermodulation products due to metallic contact nonlinearity at microwave frequencies can have severe effects on system performance.

微波频段由于金属接触非线性引起的无源互调可对系统性能造成严重影响。

This paper describes a systematic theoretical analysis and derivation of the synthesis of impedance of irrational function into a passive network.

本文主要对无理函数的阻抗函数综合为无源网络的问题进行了系统的理论分析和推导，并从以下三个方面进行论述：综合方法、正确性以及在载波通信中的具体应用。

By using methods of passivity and switching control of states of the linear subsystem, both stabilization of the linear subsystem and invariance of the specified region in state space can be guaranteed simultaneously. Hence, a sufficient condition for the robust invariance switching control of this class of systems was derived.

通过基于鲁棒严格无源技术和线性子系统状态反馈的切换控制来镇定线性子系统，同时保证了指定区域的正不变性，从而得到了该类系统鲁棒不变切换控制的充分条件。

According to the theory of passivity, the force control on the robot system is studied from a relatively new perspective.

根据无源性理论，从一个较新的角度对机器人系统的力控制问题进行了研究。

The passivity problem for a class of continuous linear singular systems is studied.

研究了连续线性时不变的广义系统的无源性问题。

Based on decentralized control method, the passivity of interconnected systems with time-delays is studied.

本文基于分散控制方法研究了关联大系统的无源性。

Although not technically unrealizable FTTH difficult, but to make FTTH towards success is worth paying attention to the following areas : research and development efforts should focus on the characteristics of new devices and meet FTTH core chip, lowering the cost of optoelectronic devices and passive components; Development of low-cost, easy to install indoor fiber, cable and connector alignment of the construction equipment and tools; Development of high density, easy-to-use fiber patch panel; focus on the development of remote monitoring and management technologies and systems.

FTTH虽然没有技术上不可实现的难点，但要使FTTH走向成功，以下方面值得重视并应集中力量攻关：开发适应FTTH特点的新型器件和核心控制芯片，降低光电器件和无源器件的成本；开发低成本、易安装的室内光纤、光缆和连接器及相配合的施工仪器工具；开发高密度、易操作的光纤配线架；开发集中的远程监视和管理技术及系统等。

One of major problems in PCL applications is the direct path interference.

无源相干定位系统中的主要问题之一就是接收机接收到的目标信号回波中的直达波干扰。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。