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pyrolusite

XDict

软锰矿; 软铁矿

PyDict

软锰矿; 软铁矿

WordNet (r) 3.0 (2006) (WordNet)

pyrolusite
n 1: a mineral consisting of manganese dioxide; an important
source of manganese

The Collaborative International Dictionary of English v.0.48 (gcide)

Pyrolusite \Pyr`o*lu"site\, n. [Pyro- Gr. ? to loose, or ? a
loosing.] (Min.)
Manganese dioxide, a mineral of an iron-black or dark
steel-gray color and metallic luster, usually soft.
Pyrolusite parts with its oxygen at a red heat, and is
extensively used in discharging the brown and green tints of
glass (whence its name).
[1913 Webster]

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pyrolusite	查看　pyrolusite　在Google字典中的解释	Google英翻中〔查看〕
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Transponder (satellite communications) - Wikipedia
NASA distinguishes between a "transceiver" and "transponder" A transceiver has an independent transmitter and receiver packaged in the same unit In a transponder the transmit carrier frequency is derived from the received signal The frequency linkage allows an interrogating ground station to recover the Doppler shift and thus infer range and
Satellite vs. Terrestrial Communication: A Comprehensive . . .
Explore the key differences between satellite and terrestrial communication systems, including coverage, latency, cost, and signal quality Understand their strengths and weaknesses
What is a Satellite Transponder? - New Space Economy
Satellite transponders are electronic devices that receive, amplify, and retransmit signals between a satellite and ground-based communication systems They are an essential component of modern communication satellites, allowing for the transmission of various types of signals, including television and radio broadcasts, telephone services, and
What is Transponder (Satellite Communications)? Functions and . . .
So, more simply, we can say that a satellite transponder is a series of interlinked devices that form a single communication channel between transmitter and receiver A combination of a transmitter-receiver system employed together to execute communication between the two is called a transponder
Overview of Satellite Communications - George Mason University
Digital information from user arrives at a “ground station” modulated carrier The satellite receives signal and changes (down-converts) the carrier frequency to the down-link frequency band Amplified carrier is re-radiated toward earth through the satellite antenna
Satellite Communication System - IMD), Pune
Transponder is a crucial component Satellite transponder” refers collectively to a transmitter-receiver subsystem on board the satellite that processes, amplifies and retransmits a range of frequencies (the transponder bandwidth) to another location terminal antenna on the earth
What is a Transponder? Its Role and Importance in Satellite . . .
In satellite communication, transponders are installed on satellites to process and relay signals received from ground stations back to Earth How Does a Transponder Work? The operation of a transponder can be summarized in four key steps: 1 Signal Reception

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