Best content in Robotics | Diigo

Robotic Fan （机器人爱好者）首页 - 1 views

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portal robot

shared by York Jong on 24 Mar 08 - Cached

Monte Carlo localization - Wikipedia, the free encyclopedia - 0 views

en.wikipedia.org/...Monte_Carlo_localization

shared by Filip Bártek on 18 May 15 - No Cached

particle filter localization
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typically starts with a uniform random distribution of particles
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hopefully most particles will converge to where the robot actually is.
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...19 more annotations...
environment is static and does not change with time
- Filip Bártek on 18 May 15
  
  We also need to capture the robot's velocity in the state (pose) in case the robot has some momentum, so the three parameters may be not enough for a 2D robot.
  
  <div class="cArrow"> </div><div class="cContentInner">We also need to capture the robot's velocity in the state (pose) in case the robot has some momentum, so the three parameters may be not enough for a 2D robot.</div>
  
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assumes the Markov property
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position and orientation
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particles are uniformly distributed over the configuration space
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Given a map
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every time
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every time
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motion_update
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sensor_update
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sensor_update
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some noise is applied
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It now believes it is at one of two locations.
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The robot has successfully localized itself.
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actuation command
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no actuator is perfect: they may overshoot or undershoot the desired amount of motion
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the motion model must be designed to include noise as necessary
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Particles which were consistent with sensor readings are more likely to be chosen
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possibly more than once
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a robot becomes increasingly sure of its position as it senses its environment
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Extreme Ultraviolet Image of a Significant Solar Flare - 0 views

www.astrobio.net/...e-of-a-significant-solar-flare

origin of life on earth nasa solar system planets in our news from

shared by Astro Biology on 21 Oct 14 - No Cached

Astro Biology on 21 Oct 14

The sun emitted a significant solar flare which is classified as an X1.1-class flare. X-class denotes the most intense flares, while the number provides more information about its strength.

<div class="cArrow"> </div><div class="cContentInner">The sun emitted a significant solar flare which is classified as an X1.1-class flare. X-class denotes the most intense flares, while the number provides more information about its strength.</div>

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Astro Biology on 21 Oct 14

The sun emitted a significant solar flare which is classified as an X1.1-class flare. X-class denotes the most intense flares, while the number provides more information about its strength.

<div class="cArrow"> </div><div class="cContentInner">The sun emitted a significant solar flare which is classified as an X1.1-class flare. X-class denotes the most intense flares, while the number provides more information about its strength.</div>

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Know More About Plenty of Water in Asteroid Fragments - 0 views

www.astrobio.net/...dance-water-asteroid-fragments

asteroid water fragment news from nasa space exploration

shared by Astro Biology on 28 Oct 14 - No Cached

Astro Biology on 28 Oct 14

Do you know new study could provide visions about the abundance of water in fragments from a famous asteroid? This research mainly focused on a mineral called apatite. Want to know more about this asteroid?

<div class="cArrow"> </div><div class="cContentInner">Do you know new study could provide visions about the abundance of water in fragments from a famous asteroid? This research mainly focused on a mineral called apatite. Want to know more about this asteroid?</div>

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Astro Biology on 28 Oct 14

Do you know new study could provide visions about the abundance of water in fragments from a famous asteroid? This research mainly focused on a mineral called apatite. Want to know more about this asteroid?

<div class="cArrow"> </div><div class="cContentInner">Do you know new study could provide visions about the abundance of water in fragments from a famous asteroid? This research mainly focused on a mineral called apatite. Want to know more about this asteroid?</div>

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Know How Origin of Earth's survived when Oxygen has Abundant - 0 views

www.astrobio.net/...life-know-now-date

earth atmosphere oxygen for life planet solar system news from nasa

shared by Astro Biology on 04 Nov 14 - No Cached

Astro Biology on 04 Nov 14

We all are aware of the fact that billions of years ago, there was very little oxygen on Earth to breathe. Scientist of University of California at Riverside (UCR) have researched when in Earth's history oxygen may have abundant. Curious to know how origins of Earth survived?

<div class="cArrow"> </div><div class="cContentInner">We all are aware of the fact that billions of years ago, there was very little oxygen on Earth to breathe. Scientist of University of California at Riverside (UCR) have researched when in Earth's history oxygen may have abundant. Curious to know how origins of Earth survived?</div>

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Astro Biology on 04 Nov 14

We all are aware of the fact that billions of years ago, there was very little oxygen on Earth to breathe. Scientist of University of California at Riverside (UCR) have researched when in Earth's history oxygen may have abundant. Curious to know how origins of Earth survived?

<div class="cArrow"> </div><div class="cContentInner">We all are aware of the fact that billions of years ago, there was very little oxygen on Earth to breathe. Scientist of University of California at Riverside (UCR) have researched when in Earth's history oxygen may have abundant. Curious to know how origins of Earth survived?</div>

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Know More about Robotic Mars Mission - 0 views

www.astrobio.net/...living-land-final-frontier

mars mission robotic exploration solar system planets news from nasa

shared by Astro Biology on 06 Nov 14 - No Cached

Astro Biology on 06 Nov 14

Do you know Robotic missions to Mars have revealed clues about the planet's atmosphere and surface composition? NASA is investing to find and use natural resources beyond Earth. Want to know more about Robotic Mars Mission.

<div class="cArrow"> </div><div class="cContentInner">Do you know Robotic missions to Mars have revealed clues about the planet's atmosphere and surface composition? NASA is investing to find and use natural resources beyond Earth. Want to know more about Robotic Mars Mission.</div>

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Astro Biology on 06 Nov 14

Do you know Robotic missions to Mars have revealed clues about the planet's atmosphere and surface composition? NASA is investing to find and use natural resources beyond Earth. Want to know more about Robotic Mars Mission.

<div class="cArrow"> </div><div class="cContentInner">Do you know Robotic missions to Mars have revealed clues about the planet's atmosphere and surface composition? NASA is investing to find and use natural resources beyond Earth. Want to know more about Robotic Mars Mission.</div>

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How Massive Geographic Change may have Triggered Explosion of Animal Life - 0 views

www.astrobio.net/...riggered-explosion-animal-life

Cambrian explosion animal life earth atmosphere geological sciencce

shared by Astro Biology on 11 Nov 14 - No Cached

Astro Biology on 11 Nov 14

Scientist are researching about geologic history that may help to solve the riddle of the "Cambrian explosion," the rapid diversification of animal life in the fossil record. Learn more about what Cambrian explosion is and how it has affected animal's life in the past.

<div class="cArrow"> </div><div class="cContentInner">Scientist are researching about geologic history that may help to solve the riddle of the "Cambrian explosion," the rapid diversification of animal life in the fossil record. Learn more about what Cambrian explosion is and how it has affected animal's life in the past.</div>

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Astro Biology on 11 Nov 14

Scientist are researching about geologic history that may help to solve the riddle of the "Cambrian explosion," the rapid diversification of animal life in the fossil record. Learn more about what Cambrian explosion is and how it has affected animal's life in the past.

<div class="cArrow"> </div><div class="cContentInner">Scientist are researching about geologic history that may help to solve the riddle of the "Cambrian explosion," the rapid diversification of animal life in the fossil record. Learn more about what Cambrian explosion is and how it has affected animal's life in the past.</div>

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Know When Milky Way Collision Occur - 0 views

www.astrobio.net/...ollision-100-million-years-ago

milky way satellite galaxy news from nasa solar system planet

shared by Astro Biology on 20 Nov 14 - No Cached

Astro Biology on 20 Nov 14

NASA scientist have found proof that our Milky Way had an encounter with a small galaxy or massive dark matter structure perhaps as recently as 100 million years ago. Are you also interested to know how galaxies form, evolve and interact?

<div class="cArrow"> </div><div class="cContentInner">NASA scientist have found proof that our Milky Way had an encounter with a small galaxy or massive dark matter structure perhaps as recently as 100 million years ago. Are you also interested to know how galaxies form, evolve and interact?</div>

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Astro Biology on 20 Nov 14

NASA scientist have found proof that our Milky Way had an encounter with a small galaxy or massive dark matter structure perhaps as recently as 100 million years ago. Are you also interested to know how galaxies form, evolve and interact?

<div class="cArrow"> </div><div class="cContentInner">NASA scientist have found proof that our Milky Way had an encounter with a small galaxy or massive dark matter structure perhaps as recently as 100 million years ago. Are you also interested to know how galaxies form, evolve and interact?</div>

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MSH 11-62 Supernova Remnant - 0 views

supernova remnant nebula solar system planets nasa space news

shared by Astro Biology on 27 Nov 14 - No Cached

Astro Biology on 27 Nov 14

Chandra of the supernova remnant MSH 11-62 reveals an irregular shell of hot gas, shown in red, surrounding an extended nebula of high energy X-rays, shown in blue.

<div class="cArrow"> </div><div class="cContentInner">Chandra of the supernova remnant MSH 11-62 reveals an irregular shell of hot gas, shown in red, surrounding an extended nebula of high energy X-rays, shown in blue.</div>

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Astro Biology on 27 Nov 14

Chandra of the supernova remnant MSH 11-62 reveals an irregular shell of hot gas, shown in red, surrounding an extended nebula of high energy X-rays, shown in blue.

<div class="cArrow"> </div><div class="cContentInner">Chandra of the supernova remnant MSH 11-62 reveals an irregular shell of hot gas, shown in red, surrounding an extended nebula of high energy X-rays, shown in blue.</div>

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Recursive Bayesian estimation - Wikipedia, the free encyclopedia - 0 views

en.wikipedia.org/...Recursive_Bayesian_estimation

shared by Filip Bártek on 18 May 15 - No Cached

is constant relative to
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is constant relative to
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is constant relative to
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...13 more annotations...
Markov assumption
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conditionally independent of the other earlier states
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measurement at the k-th timestep is dependent only upon the current state
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proportional
- Filip Bártek on 18 May 15
  
  It is proportional with the factor \alpha. \alpha = 1 / p(z_k|z_{1:k-1}) A way to compute the value of \alpha is shown below. It is common to all the updated states x_k at a given time k and measurement z_k.
  
  <div class="cArrow"> </div><div class="cContentInner">It is proportional with the factor \alpha. \alpha = 1 / p(z_k|z_{1:k-1}) A way to compute the value of \alpha is shown below. It is common to all the updated states x_k at a given time k and measurement z_k.</div>
  
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predicted
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predict and update steps
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predicted state
- Filip Bártek on 18 May 15
  
  p(x_k|z_{1:k-1})
  
  <div class="cArrow"> </div><div class="cContentInner">p(x_k|z_{1:k-1})</div>
  
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update
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marginalising out the previous states
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measurement likelihood
- Filip Bártek on 18 May 15
  
  p(z_k|x_k)
  
  <div class="cArrow"> </div><div class="cContentInner">p(z_k|x_k)</div>
  
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is constant relative to
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can usually be ignored in practice
- Filip Bártek on 18 May 15
  
  We are typically interested in relative probabilities of the states. Equivalently [?], the p(x_k|z_{1:k}) across all the estimated states x_k is a probability distribution: \Sum_{x_k}{p(x_k|z_{1:k})} = 1
  
  <div class="cArrow"> </div><div class="cContentInner">We are typically interested in relative probabilities of the states. Equivalently [?], the p(x_k|z_{1:k}) across all the estimated states x_k is a probability distribution: \Sum_{x_k}{p(x_k|z_{1:k})} = 1</div>
  
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simply normalized, since its integral must be unity
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Earth's magnetic field has flipped - 0 views

www.astrobio.net/...eld-flip-within-human-lifetime

news from nasa solar system planets in our

shared by Astro Biology on 20 Oct 14 - No Cached

Astro Biology on 20 Oct 14

The new discovery indicates that the intensity of Earth's magnetic field is decreasing 10 times faster, leading some geophysicists to predict a reversal within a few thousand years.

<div class="cArrow"> </div><div class="cContentInner">The new discovery indicates that the intensity of Earth's magnetic field is decreasing 10 times faster, leading some geophysicists to predict a reversal within a few thousand years.</div>

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Astro Biology on 20 Oct 14

The new discovery indicates that the intensity of Earth's magnetic field is decreasing 10 times faster, leading some geophysicists to predict a reversal within a few thousand years.

<div class="cArrow"> </div><div class="cContentInner">The new discovery indicates that the intensity of Earth's magnetic field is decreasing 10 times faster, leading some geophysicists to predict a reversal within a few thousand years.</div>

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Milky Way View From Space Station - 0 views

milky way spacecraft space exploration nasa news

shared by Astro Biology on 17 Oct 14 - No Cached

Astro Biology on 17 Oct 14

The Milky way steals the show from Sahara sands that make the Earth glow orange. Reid Wiseman a NASA astronaut has captured this pic from International Space Station.

<div class="cArrow"> </div><div class="cContentInner">The Milky way steals the show from Sahara sands that make the Earth glow orange. Reid Wiseman a NASA astronaut has captured this pic from International Space Station.</div>

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Astro Biology on 17 Oct 14

The Milky way steals the show from Sahara sands that make the Earth glow orange. Reid Wiseman a NASA astronaut has captured this pic from International Space Station.

<div class="cArrow"> </div><div class="cContentInner">The Milky way steals the show from Sahara sands that make the Earth glow orange. Reid Wiseman a NASA astronaut has captured this pic from International Space Station.</div>

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