wave-number range

When the detection range of the IR thermal imager is calculated by using NETD, the target radiation brightness difference must be calculated in the operating wave band.

在采用NETD计算红外热像仪的探测距离时，需要计算目标在热像仪探测波段范围内的辐射亮度差。

Secondly, based on the principle of radio direction finding, this paper designed the radio-wave monitor, and mainly discussed the monitoring range of immovable station and the choice of monitoring station receivers.

其次，利用无线电测向原理对无线电监测系统进行设计构建，并在重点考虑固定站监测覆盖范围的影响因素，以及监测站接收机的选择。

It is proposed that there is a quicker valve-opening speed during the lift of the valve with asymmetrical, N-times harmonic wave cam, and an enlarged wrap angle during the buffer, which can effectively increase the lifting range of tappet stem and approve charging;

非对称N次谐波凸轮的气门上升段的气门开启速度可取得较大，并将缓冲段包角增大，可以有效地提高上升段的挺柱升程丰满系数，改善充气性能；

Super resolution for target range and azimuth angle of a novel bistatic HF-Surface Wave Radar ( HF-SWR) is investigated.

本文研究了一种新的高频地波超视距雷达目标距离以及方位角超分辨问题。

Short range weather forecast of cold wave in Eastern Northwest China

西北区东部寒潮天气短期预报