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servomechanism    
n. 自动驾驶装置,补助机构,自动控制装置

自动驾驶装置,补助机构,自动控制装置

servomechanism
伺服机构

servo-mechanism
伺服机构


servomechanism
伺服机构

servomechanism
n 1: control system that converts a small mechanical motion into
one requiring much greater power; may include a negative
feedback system [synonym: {servo}, {servomechanism},
{servosystem}]

Servomechanism \Ser`vo*mech"an*ism\, n.
an electronically controlled mechanical or hydraulic device
permitting a large action or strong forces to be controlled
by a small electrical signal.
[PJC]


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  • Age of Earth - Wikipedia
    The age of Earth is estimated to be 4 54 ± 0 05 billion years [1][2][3][4] This age corresponds to the final stages of Earth 's accretion and planetary differentiation during the early Hadean eon [5]
  • How Old Is Earth and How Did Scientists Figure It Out?
    How old is the Earth in human years? If you look up the age of Earth on science websites and in publications, you'll generally find an estimate of 4 54 billion years, plus or minus 50 million years
  • How Old Is Earth? | Britannica
    People and all other known forms of life inhabit one very old planet In numerical terms, the best estimate of Earth’s age so far is that it is close to 4 6 billion years old
  • 6000 Years Or 4. 5 Billion: How Old is the Earth Really?
    How old is the Earth really? The question of Earth’s age has long fascinated humankind Several scientific tests for determining the age of the Earth, considered robust by many in the scientific community, appear to indicate our planet may be billions of years old
  • How Old Is the Earth? How Do We Know? - Science Notes and Projects
    Scientists estimate the age of the Earth is approximately 4 54 billion years, plus or minus 50 million years This estimate is for the age of the Earth’s accretion into a planet with a core and spherical shape
  • How Old Is the Earth According to the Bible? A Clear Biblical Timeline . . .
    When people ask how old is the earth according to the Bible, they’re really asking: Does Scripture tell us when God created the earth, and how long ago that was? This question blends the hunger for spiritual truth with our wonder about God’s creation
  • How Did Scientists Calculate the Age of Earth? - Education
    Scientists have calculated the age of our planet to be approximately 4 5 billion years But how did scientists determine that age? The answer is complicated: It involves everything from observation to complicated mathematics to understanding the elements that make up our planet
  • How old is Earth? Our worlds surprising age, explained
    The Earth is 4 54 billion years old, give or take 50 million years This means that the Earth is under half the age of the Milky Way Galaxy, 11-13 billion years old,and around a third of the age of the Universe (10-15 billion years old)
  • History of life - Wikipedia
    The history of life on Earth traces the processes by which living and extinct organisms evolved, from the earliest emergence of life to the present day
  • How Old Is The Earth? - WorldAtlas
    How Old Is The Earth? Gazing at a globe or world map reveals the stunning features of Earth: towering mountains, deep oceans, vast continents, and expansive glaciers! These features contribute to the planet's age, estimated by scientists to be around 4 5 billion years





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