查询词典 radio astronomy

Parametric amplifier in a number of microwave devices, widely used, usually in radar, navigation, electronic warfare, radio astronomy microwave systems such as receiver front-end amplifier, greatly increased the sensitivity of the receiver.

参量放大器在许多微波设备中得到广泛的应用，通常在雷达、导航、电子对抗、射电天文等微波系统中作接收机前端放大器，大大提高了接收机的灵敏度。

Radio astronomy has greatly increased our understanding of the universe .

辐射天文学大大地增进了我们对宇宙的了解。

Other research has been in the fields of nonlinear optics, radio astronomy, and infrared astronomy.

在五十年代后期，汤斯和其他一些科学家确实制成了固体脉泽。

As we know, digital technique has gained the great development in the ages, and it can be found in almost every engineering science including radio astronomy and radio telescope technique.

在过去几十年里，数字技术取得了重大发展。在很多技术科学领域都能找到它的踪影，包括射电天文学以及射电望远镜技术。

In none of these respects does optical astronomy have any advantage over radio astronomy .

在所有这些指标上，射电天文并不比光学天文逊色。

Radio astronomy is different from most other forms of observational astronomy in that the observed radio waves can be treated as waves rather than as discrete photons .

射电天文不同于大多数其他形式的观测天文学中所观察到的无线电波可被视为波，而不是离散的光子。

A new science, Radio Astronomy, has emerged, and it is very closely allied to astronomy, astro- physics

出现了一门新兴学科----无线电天文学，它与天文学、天文物理学和物理学关系密切。

Radio spectrometer is important method and main instrument of radio astronomy research, through which we can research radio astronomy phenomenon in wide frequency spectrum and continuous time with high frequency resolution and high temporal resolution.

射电频谱仪是通过高的频率分辨率和高的时间分辨率，在广泛的频谱范围内和连续的时间演化上进行射电天文观测的仪器，它是射电天文研究的重要方法和主要工具。

The pioneer of amateur radio astronomy was Karl Jansky who started observing the sky at radio wavelengths in the 1930s.

的先驱业余无线电天文学卡尔詹斯基谁观测天空开始在无线电波长在20世纪30年代。

The basic principle and optical telescopes are similar not only to receive light waves but the radio waves .1932 years Jansky first in the world to detect extraterrestrial radio waves, thus marking the birth of radio astronomy.

其基本原理与光学望远镜相似，唯接收的不是光波而是射电波。1932年央斯基在世界上第一个探测到地外射电波，从而标志着射电天文学的诞生。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。