intensity shuttle_1

intensity shuttle

       大家好，今天我来为大家详细地介绍一下关于intensity shuttle的问题。以下是我对这个问题的总结和归纳，希望能对大家有所帮助。

1.intensity shuttle

2.能不能告诉我体育专用名词的中英文

3.blackmagic摄影机是那个囯生产的说

4.流媒体服务器 网络直播 怎么做?

intensity shuttle

       Imaging Radar is an imaging radar works very like a flash camera in that it provides its own light to illuminate an area on the ground and take a snapshot picture, but at radio welengths. A flash camera sends out a pulse of light (the flash) and records on film the light that is reflected back at it through the camera lens. Instead of a camera lens and film, a radar uses an antenna and digital computer tapes to record its images. In a radar image, one can see only the light that was reflected back towards the radar antenna.

       A typical radar (RAdio Detection and Ranging) measures the strength and round-trip time of the microwe signals that are emitted by a radar antenna and reflected off a distant surface or object. The radar antenna alternately transmits and receives pulses at particular microwe welengths (in the range 1 cm to 1 m, which corresponds to a frequency range of about 300 MHz to 30 GHz) and polarizations (wes polarized in a single vertical or horizontal plane). For an imaging radar system, about 1500 high- power pulses per second are transmitted toward the target or imaging area, with each pulse hing a pulse duration (pulse width) of typically 10-50 microseconds (us). The pulse normally covers a small band of frequencies, centered on the frequency selected for the radar. Typical bandwidths for an imaging radar are in the range 10 to 200 MHz. At the Earth's surface, the energy in the radar pulse is scattered in all directions, with some reflected back toward the antenna. Thisbackscatter returns to the radar as a weaker radar echo and is received by the antenna in a specific polarization (horizontal or vertical, not necessarily the same as the transmitted pulse). These echoes are converted to digital data and passed to a data recorder for later processing and display as an image. Given that the radar pulse trels at the speed of light, it is relatively straightforward to use the measured time for the roundtrip of a particular pulse to calculate the distance or range to the reflecting object. The chosen pulse bandwidth determines the resolution in the range (cross-track) direction. Higher bandwidth means finer resolution in this dimension.

       Radar transmits a pulse Measures reflected echo (backscatter )

       Click Here to See Animation

       In the case of imaging radar, the radar moves along a flight path and the area illuminated by the radar, or footprint, is moved along the surface in a swath, building the image as it does so.

       Building up a radar image using the motion of the platform

       The length of the radar antenna determines the resolution in the azimuth (along-track) direction of the image: the longer the antenna, the finer the resolution in this dimension. Synthetic Aperture Radar (SAR) refers to a technique used to synthesize a very long antenna by combining signals (echoes) received by the radar as it moves along its flight track. Aperture means the opening used to collect the reflected energy that is used to form an image. In the case of a camera, this would be the shutter opening; for radar it is the antenna. A synthetic aperture is constructed by moving a real aperture or antenna through a series of positions along the flight track.

       Constructing a Synthetic Aperture

       As the radar moves, a pulse is transmitted at each position; the return echoes pass through the receiver and are recorded in an 'echo store.' Because the radar is moving relative to the ground, the returned echoes are Doppler-shifted (negatively as the radar roaches a target; positively as it moves away). Comparing the Doppler-shifted frequencies to a reference frequency allows many returned signals to be "focused" on a single point, effectively increasing the length of the antenna that is imaging that particular point. This focusing operation, commonly known as SAR processing, is now done digitally on fast computer systems. The trick in SAR processing is to correctly match the variation in Doppler frequency for each point in the image: this requires very precise knowledge of the relative motion between the platform and the imaged objects (which is the cause of the Doppler variation in the first place).

       Synthetic aperture radar is now a mature technique used to generate radar images in which fine detail can be resolved. SARs provide unique capabilities as an imaging tool. Because they provide their own illumination (the radar pulses), they can image at any time of day or night, regardless of sun illumination. And because the radar welengths are much longer than those of visible or infrared light, SARs can also "see" through cloudy and dusty conditions that visible and infrared instruments cannot.

       What is a radar image?

       Radar images are composed of many dots, or picture elements. Each pixel (picture element) in the radar image represents the radar backscatter for that area on the ground: darker areas in the image represent low backscatter, brighter areas represent high backscatter. Bright features mean that a large fraction of the radar energy was reflected back to the radar, while dark features imply that very little energy was reflected. Backscatter for a target area at a particular welength will vary for a variety of conditions: size of the scatterers in the target area, moisture content of the target area, polarization of the pulses, and observation angles. Backscatter will also differ when different welengths are used.

       Scientists measure backscatter, also known as radar cross section, in units of area (such as square meters). The backscatter is often related to the size of an object, with objects roximately the size of the welength (or larger) earing bright (i.e. rough) and objects smaller than the welength earing dark (i.e. smooth). Radar scientists typically use a measure of backscatter called normalized radar cross section, which is independent of the image resolution or pixel size. Normalized radar cross section (sigma0.) is measured in decibels (dB). Typical values of sigma0. for natural surfaces range from +5dB (very bright) to -40dB (very dark).

       A useful rule-of-thumb in analyzing radar images is that the higher or brighter the backscatter on the image, the rougher the surface being imaged. Flat surfaces that reflect little or no microwe energy back towards the radar will always ear dark in radar images. Vegetation is usually moderately rough on the scale of most radar welengths and ears as grey or light grey in a radar image. Surfaces inclined towards the radar will he a stronger backscatter than surfaces which slope away from the radar and will tend to ear brighter in a radar image. Some areas not illuminated by the radar, like the back slope of mountains, are in shadow, and will ear dark. When city streets or buildings are lined up in such a way that the incoming radar pulses are able to bounce off the streets and then bounce again off the buildings (called a double- bounce) and directly back towards the radar they ear very bright (white) in radar images. Roads and freeways are flat surfaces so ear dark. Buildings which do not line up so that the radar pulses are reflected straight back will ear light grey, like very rough surfaces.

       Imaging different types of surface with radar

       Backscatter is also sensitive to the target's electrical properties, including water content. Wetter objects will ear bright, and drier targets will ear dark. The exception to this is a smooth body of water, which will act as a flat surface and reflect incoming pulses away from a target; these bodies will ear dark.

       Backscatter will also vary depending on the use of different polarization. Some SARs can transmit pulses in either horizontal (H) or vertical (V) polarization and receive in either H or V, with the resultant combinations of HH (Horizontal transmit, Horizontal receive), VV, HV, or VH. Additionally, some SARs can measure the phase of the incoming pulse (one welength = 2pi in phase) and therefore measure the phase difference (in degrees) in the return of the HH and VV signals. This difference can be thought of as a difference in the roundtrip times of HH and VV signals and is frequently the result of structural characteristics of the scatterers. These SARs can also measure the correlation coefficient for the HH and VV returns, which can be considered as a measure of how alike (between 0/not alike and 1/alike) the HH and VV scatterers are.

       Different observations angles also affect backscatter. Track angle will affect backscatter from very linear features: urban areas, fences, rows of crops, ocean wes, fault lines. The angle of the radar we at the Earth's surface (called the incidence angle) will also cause a variation in the backscatter: low incidence angles (perpendicular to the surface) will result in high backscatter; backscatter will decrease with increasing incidence angles.

       Radar backscatter is a function of incidence angle, (theta)i

       NASA/JPL's Radar Program

       NASA/JPL's radar program began with the SEASAT synthetic aperture radar (SAR) in 18. SEASAT was a single frequency (L-band with lambda ~ 24 cm or 9.4 inches), single polarization, fixed-look angle radar. The Shuttle Imaging Radar-A (SIR-A), flown on the Space Shuttle in 1981, was also an L- band radar with a fixed look angle. SIR-B () added a multi-look angle capability to the L-band, single polarization radar. SIR-C/X-SAR is a joint venture of NASA, the German Space Agency (DARA), and the Italian Space Agency (ASI). SIR-C/X-SAR provided increased capability over Seasat, SIR-A, and SIR-B by acquiring images at three microwe welengths (lambda), L- band (lambda ~ 24 cm or 9.4 inches) quad-polarization; C-band (lambda ~ 6 cm or 2.4 inches) quad- polarization; and X-band (lambda ~ 3 cm) with VV polarization. SIR-C/X-SAR also has a variable look angle, and can image at incidence angles between 20 and 65 degrees. SIR-C/X-SAR flew on the shuttle in April and in October of 1994, providing radar data for two seasons. Typical image sizes for SIR-C data products are 50kmx100km, with resolution between10 and 25 meters in both dimensions.

       Parallel to the development of spaceborne imaging radars, NASA/JPL he built and operated a series of airborne imaging radar systems. NASA/JPL currently maintain and operate an airborne SAR system, known as AIRSAR/TOPSAR, which flies on a NASA DC-8 jet. In one mode of operation, this system is capable of simultaneously collecting all four polarizations (HH,HV, VH and VV) for three frequencies: L- band (lambda ~ 24 cm); C-band (lambda ~ 6 cm) ; and P-band (lambda ~ 68 cm). In another mode of operation, the AIRSAR/TOPSAR system collects all four polarizations (HH,HV, VH and VV) for two frequencies: L- band (lambda ~ 24 cm); and P-band (lambda ~ 68 cm), while operating as an interferometer at C-band to simultaneously generate topographic height data. AIRSAR/TOPSAR also has an along-track interferometer mode which is used to measure current speeds. Typical image sizes for AIRSAR/TOPSAR products are 12kmx12km, with 10 meter resolution in both dimensions. Topographic map products generated by the TOPSAR system he been shown to he a height accuracy of1 m in relatively flat areas, and 5 m height accuracy in mountainous areas.

       JPL are studying designs for a free-flying multi- parameter imaging radar system like the one flown during the SIR-C/X-SAR missions. JPL are also studying a global ming mission (TOPSAT) which will use radar interferometry to generate high quality topographic maps over the whole world and monitor changes in topography in areas prone to earthquakes and volcanic activity.

       To inquire about the ailability of imaging radar data from the SIR-C, SIR-B, SIR-A or Seasat missions, or the airborne AIRSAR/TOPSAR system, please contact:

       Radar Data Center

       Mail Stop 300 - 233

       Jet Propulsion Laboratory

       4800 Oak Grove Drive

       Pasadena, CA 91109

       Fax: (818) 393 2640

       Other Contact Information

       To learn more about NASA/JPL's Imaging Radar Program, if you are an Internet user, please refer to World Wide Web server site at URL: ://southport.jpl.nasa.gov/

能不能告诉我体育专用名词的中英文

       成为一名宇航员,应该做什么?

       What should I do to become an astronaut?

       回答：

       I must study hard now.I should know more knowledge.I must do more exercise .I must keep healthy.They are very important for me.I will do my best to do that.And I am sure I will be an astronaut.

       我现在必须努力学习。我应该知道更多的知识。我必须做更多的运动。我必须保持健康。它们对我很重要。我会尽我最大的努力。我相信我会成为一名宇航员。

       ——希望可以帮到你！

blackmagic摄影机是那个囯生产的说

       这些都是关于体育的名词，中英对照的。

       你看够不够你用？

       优秀选手 top-ranking/topnotch athlete

       田径运动 track and field; athletics

       田赛 field events

       竞赛 track events

       跳高 high jump

       撑杆跳高 pole jump; polevault

       跳远 long/broad jump

       跳远 hop, step and jump; triple jump

       标枪 jelin throw

       铅球 shot put

       铁饼 discus throw

       链球 hammer throw

       马拉松赛跑 Marathon (race)

       接力 relay race; relay

       跨栏比赛 hurdles; hurdle race

       竞走 walking; walking race

       体操 gymnastics

       自由体操 floor/free exercises

       技巧运动 acrobatic gymnastics

       垫上运动 mat exercises

       单杠 horizontal bar

       双杠 parallel bars

       高低杠 uneven bars; high-low bars

       吊环 rings

       跳马 vaulting horse

       鞍马 pommel horse

       平衡木 balance beam

       球类运动 ball games

       足球 football;

       足球场 field; pitch

       篮球 basketball

       篮球场 basketball court

       排球 volleyball

       乒乓球 table tennis; ping pong

       乒乓球拍 racket; bat

       羽毛球运动 badminton

       羽毛球 shuttlecock; shuttle

       球拍 racket

       网球 tennis

       棒球 baseball

       垒球 softball

       棒/垒球场 baseball(soft ball)field/ground

       手球 handball

       手球场 handball field

       曲棍球 hockey; field hockey

       冰上运动 ice sports

       冰球运动 ice hockey

       冰球场 rink

       冰球 puck; rubber

       速度滑冰 speed skating

       花样滑冰 figure skating

       冰场 skating rink; ice rink

       人工冰场 artificial ice stadium

       滑雪 skiing

       速度滑雪 cross country ski racing

       高山滑雪 alpine skiing

       水上运动 water/acquatic sports

       水上运动中心 aquatic sports center

       水球（运动）water polo

       水球场 playing pool

       滑水 water-skiing

       冲浪 surfing

       游泳 swimming

       游泳池 swimming pool

       游泳馆 natatorium

       自由泳 freestyle; crawl (stroke)

       蛙泳 breaststroke

       侧泳 sidestroke

       蝶泳 butterfly (stroke)

       海豚式 dolphin stroke/kick

       蹼泳 fin swimming

       跳水 diving

       跳台跳水 platform diving

       跳板跳水 springboard diving

       赛艇运动 rowing

       滑艇/皮艇 canoeing

       帆船运动 yachting; sailing

       赛龙船 dragon-boat racing

       室内运动 indoor sports

       举重 weightlifting

       重量级 heyweight

       中量级 middleweight

       轻量级 lightweight

       拳击 boxing

       摔交 wresting

       击剑 fencing

       射击 shooting

       靶场 shooting range

       射箭 archery

       拳术 quanshu; barehanded exercise; Chinese boxing

       气功 qigong; breathing exercises

       自行车运动 cycling; cycle racing

       赛车场（自行车等的）倾斜赛车场 cycling track

       室内自行车赛场 indoor velodrome

       摩托运动 motorcycling

       登山运动 mountaineering; mountain-climbing

       骑术 horsemanship

       场 equestrian park

       国际象棋 (international) chess

       特级大师 grandmaster

       象棋 xiangqi; Chinese chess

       围棋 weiqi; go

       航空模型 aeromodel; model aeroplane

       航海模型 marine modelling; model ship

       跳伞 parachuting

       定点跳伞 accuracy jump; precision landing

       无线电定向 radio direction finding

       造型跳伞 relative work

       滑翔运动 gliding; sailplaning

       技巧 sports acrobatics

       拔河 tug-of-war

       毽子 shuttlecock

       踢毽子 shuttlecock kicking

       毽秋 jianqiu; shuttlecock playing

流媒体服务器 网络直播 怎么做?

       Blackmagic Design是一家来自澳大利亚的生产集卡、数字电视摄影机、制作切换台、硬盘录像机、矩阵切换和分配设备、监看设备等产品的公司。该公司是由执行长格兰特·佩帝（Grant Petty）建立的。

       产品：

       数字电视摄影机

       Blackmagic Cinema Camera：是一种配有2.5K图像感应器，支持13档动态范围，配备SSD，支持无压缩以及压缩格式RAW的兼容EF和ZE卡口镜头的数字电视摄影机。

       制作切换台

       ATEM制作切换台：是广播级1 M/E和2 M/E直播制作切换台。

       硬盘录像机

       包括HyperDeck Shuttle、HyperDeck Studio等。

       PCIe集和播放

       DeckLink Studio：是一款兼容SD和HD的经济型SDI、HDMI和模拟集卡。

       DeckLink Quad：是一款四通道SDI/HD-SDI集卡。

       Intensity Pro：是为独立电视制作人设计的HDMI和模拟集卡。

       DeckLink HD Extreme 3D：是支持3D的SD/HD/2K 4:4:4集卡。

       DeckLink 4K Extreme：是支持4:4:4和3D的SD/HD/2K/4K集卡。

       集和播放设备

       Intensity Shuttle：有USB3.0和Thunderbolt版本，可以进行10bit HDMI和模拟制作。

       UltraStudio Pro：是世界首款支持USB3.0的广播级10 bit制作解决方案。

       UltraStudio SID：可以在USB3.0电脑上进行SDI集、播放以及HDMI监视。

       UltraStudio 3D：可以在Thunderbolt电脑上提供2K和3D集和播放功能。

       UltraStudio Express：可以在Thunderbolt电脑上提供SDI和HDMI的集和播放。

       UltraStudio Mini Recorder和Mini Monitor：是袖珍型SDI/HDMI集或输出产品。

       UltraStudio 4K：是支持各类音频连接的接口箱。

       处理

       Teranex 2D和3D处理器：是支持上、下、交叉、标准转换，以及降噪等功能，配备Thunderbolt接口的转换器。

       色彩校正

       DaVinci Resolve：是可用于Mac OS X、Windows和Linux平台的调色系统。

       胶片修复

       DaVinci Revival：是胶片修复软件，为Linux平台提供自动和交互式工作流程。

       转换器

       Mini Converters：是广播级转换器。

       Mini Converter Hey Duty：是用高强度金属打造的小型转换器，适用于现场制作。该设备还有一款带有内部电池的版本：Battery Converters。

       OpenGear Converters：是广播行业标准机架式转换器。

       矩阵切换和分配

       Videohub系列：是广播级一体式3 Gb/s SDI矩阵，提供从16 x 16到72 x 144的多种接口规模。

       Videohub控制面板：设备通过以太网控制。

       Universal Videohub：可根据需求，用SDI或光纤接口插板组建自己的矩阵，获得24 x 7的可靠性。

       监看

       HDLink：可利用LCD显示器实现2D/3D HDTV和2K监看。

       DVI Extender：可用SDI电缆和矩阵传输或切换电脑显卡输出信号。

       SmartView：是支持SD、HD和2K的LCD SDI监视器。

       测试设备

       包括Pocket UltraScope和Blackmagic UltraScope，具有示波器功能。

       1、专业级直播原理：

       在直播现场，通过一台或多台摄像机对现场画面实时收集，然后将信号实时传递给集卡，集卡再将信号发送给电脑进行实时编码并上传云端服务，同时分发到各个播放器进行直播观看。

       2、直播系统架构：

       摄像机====HDMI接口连接===?集卡===USB 3.0连接===?编码电脑

       3、直播端网络要求：

       一路直播流要求上行带宽(电信/联通)2M以上。

       4、设备要求及推荐型号：

       直播接收端设备要求

       摄像机（且带HDMI输出端口）：如索尼（SONY）HDR-CX610E

       集卡：Blackmagic decklink Intensity Shuttle USB3.0（外置HDMI集卡）

       电脑（具有USB3.0接口）：如戴尔（DELL） Ins14VR-3516 （win7）

       编码软件： Flash Media Encoder、Wirecast

       5、网络直播传输服务：

       云直播服务商：如保利威视（POLYV）

       好了，关于“intensity shuttle”的话题就讲到这里了。希望大家能够对“intensity shuttle”有更深入的了解，并且从我的回答中得到一些启示。