搜索结果: 1-15 共查到“理学 radar”相关记录189条 . 查询时间(0.123 秒)
宿主细胞依赖多种免疫应答机制来对抗病毒感染。其中，针对核酸分子的免疫识别和操作，是极为核心的抗病毒免疫策略，其广泛存在于从细菌到哺乳动物等几乎所有宿主系统中（图-1）。相较于哺乳动物细胞稍显复杂的信号转导和调控，细菌往往更为简单高效，其编码的多种抗病毒免疫系统可直接对核酸分子进行切割或修饰（图-1）。这种特点也使得细菌免疫系统被广泛用于多种生物学工具的开发（如R-M和CRISPR-Cas等），极大...
We are all too familiar with severe weather on Earth, but many of us aren’t aware of the severe weather in space – the varying conditions between the sun and the Earth, including solar wind, flares an...
Weather surveillance radar data shows 45 million insects taking flight over brightly lit city（图）
Weather surveillance radar data 45 million insects flight lit city
2021/4/15
The expansion of artificial night lights globally has had important impacts on animal behavior and health. A new study led by researchers at the University of Oklahoma on the effects of brig...
Weather radar records drastic drop in mayfly populations（图）
Weather radar drastic drop mayfly populations
2020/1/6
At the beginning of each summer, mayfly larvae emerge from bodies of water and shed their skin to become full-fledged mayflies, similar to the way in which caterpillars become butterflies.
RESEARCH ON VISUALIZATION OF GROUND LASER RADAR DATA BASED ON OSG
LiDAR Data Visualization OSG Point Cloud Triangulation Network Qt
2018/4/30
Three-dimensional (3D) laser scanning is a new advanced technology integrating light, machine, electricity, and computer technologies. It can conduct 3D scanning to the whole shape and form of space o...
WIND SHEAR IDENTIFICATION WITH THE RETRIEVAL WIND OF DOPPLER WEARTH RADAR
Wind shear Doppler weather radar Conventions Wind field retrieval Guangzhou
2018/4/30
A new method, which based on the wind field retrieval algorithm of Volume Velocity Process (VVP), has been used to identified the intensity of wind shear occurred in a severe convection process in Gua...
POSSIBILITIES OF THE JOINT USE OF OPTICAL AND RADAR DATA IN FLOOD SPACE MONITORING
Remote Sensing Space Monitoring High Waters Flood Radar Data Radar Polarimetry
2018/3/6
The article gives a brief description of the system of space monitoring of high water and floods. Its main tasks are the operational dynamics of snow and ice cover melting and the passage of flood wat...
POSSIBILITIES OF THE JOINT USE OF OPTICAL AND RADAR DATA IN FLOOD SPACE MONITORING
Remote Sensing Space Monitoring High Waters Flood Radar Data Radar Polarimetry
2018/3/6
The article gives a brief description of the system of space monitoring of high water and floods. Its main tasks are the operational dynamics of snow and ice cover melting and the passage of flood wat...
World’s most advanced shipborne radar ready to set sail（图）
World most advanced shipborne radar set sail
2017/9/29
In mid-October, Steven Rutledge will sail to the intertropical convergence zone near the Equator aboard a 300-foot vessel called the R/V Roger Revelle.It’s not a vacation cruise. Rutledge, professor o...
The noise and pseudo-noise radars are under research for several decades. Two decades ago mostly theory has been developed. In the last decade several demonstrators with off-line processing have been ...
Image Release:New Radar Map Reveals The Moon’s Hidden Geology（图）
new radar map moon hidden geology
2017/8/9
As the public prepares for the upcoming eclipse, astronomers have released a striking new radar view of the Moon. Researchers from the Smithsonian’s National Air and Space Museum are using radio teles...
Nonspecular meteor trail altitude distributions and durations observed by a 50 MHz high‐power radar
durations observed trail altitude distributions
2017/3/22
High‐power large‐aperture (HPLA) radars frequently observe nonspecular meteor trail
echoes that result from plasma turbulence driven by the intense pressure gradients on
the trail edges. This paper ...
Iowa State engineers develop flexible skin that traps radar waves,cloaks objects
Iowa State engineers flexible skin traps radar waves cloaks objects
2016/3/4
AMES, Iowa – Iowa State University engineers have developed a new flexible, stretchable and tunable “meta-skin” that uses rows of small, liquid-metal devices to cloak an object from th...
Scientists track nighttime bird migration using weather radar
Scientists nighttime bird migration weather radar
2016/2/16
Using recently developed techniques for analyzing Doppler weather radar data, researchers looked at the impediments -- crosswinds and oceans -- facing nighttime-migrating birds in eastern North Americ...
The highest-resolution radar images of asteroid 2015 TB145's safe flyby of Earth have been processed and yield new information about its surface features. To obtain these highest-resolution radar...