Vorpal Rabbit Game
By Ran Bi, May 26, 2014.The Vowpal Wabbit (VW) is a project started at Yahoo! Research and now sponsored by Microsoft Research. Started and led by John Langford, VW focuses on fast learning by building an intrinsically fast learning algorithm.
John gave two guest lectures to us on AllReduce and Bandits during NYU Big Data class this semester. From what I see, he is a reputed researcher and really passionate about online learning algorithm.The Vowpal Wabbit name is oddly pronounced and strange. Langford explained that Vowpal Wabbit is how Elmer Fudd would pronounce “Vorpal Rabbit”.
As for “Vorpal”, if you Google it, you will find “Vorpal Bunny”, which is also known as a “killer rabbit” in a popular computer game. Maybe this is exactly what he wants VW to be – cute but also powerful and fast.VW supports a number of machine learning problems, importance weighting, a selection of loss functions and optimization algorithms, like SGD (Stochastic Gradient Descent), BFGS (a a popular algorithm for parameter estimation), conjugate gradient etc. It has been used to learn a sparse terafeature (i.e. 10 12 sparse features) dataset on 1000 nodes in one hour, which beats all current machine linear learning algorithms.
According to its tutorial on John Langford’s GitHub, VW is about a factor of 3 faster than on the RCV1 example, which is a collection for text categorization.The default mode of VW is a SGD online learner with a squared loss function. To run VW, the data is expected to be in a particular format, which is“label weight Namespace Feature1:Value1 Namespace Feature2:Value2 ”.The format is also ideal for sparse representations since feature value of zero doesn’t need to be specified. If you are not sure whether the data is in the right format, you can always paste lines of the data in the. VW is efficient and very scalable. To vectorize features it uses a hash trick, which takes almost no RAM and is 10 times faster since no hash-map table is maintained internally.A dozen of companies are using VW.
One of them is eHarmony, which helps people find true love. It is John’s favorite app as he said on NIPS 2011.
VW was also used for solving several Kaggle competitions. More information can be found on.Note: Vowpal Wabbit is different from Deep Learning – see here.Related:.Comment from Dan Rice on LinkedIn:What is interesting about Vowpal is that it is fast because it does sampling, as it is a serial processing based method. This sampling is not done in the traditional way by sampling observations. Instead, they sample one feature at a time in the gradient descent – in what is stochastic gradient descent. So those in the machine learning community who criticize sampling also need to be aware that their own fast methods like Vowpal also clearly use sampling.The Vowpal results sometimes might be as accurate as traditional gradient descent methods in standard logistic regression, but are often substantially less accurate.
In fact, it is probably possible to match the speed and accuracy performance in Vowpal with large numbers of observations by using standard logistic regression and simply sampling observations. As referenced below, the inventor of Vowpal – Langford, has recently been publishing on hybrid approaches that mix the stochastic gradient descent approach of Vowpal with traditional gradient descent approaches in logistic regression to try to increase accuracy. But these are now parallel processing methods in part. With parallel processing today, the issue of speed is much less important than it was a few years ago, but the other issues like reliability, accuracy, stability and absence of bias are still far more important. If sampling is done, the key is to make sure that it does not compromise accuracy as it did in the case of Vowpal which is why there has been a movement to new more accurate methods by its inventor., by Alekh Agarwal, Olivier Chapelle, Miroslav Dudik, John Langford.
Contents.In the film The Cave of Caerbannog is the home of the Legendary Black Beast of Arrrghhh (named for the last utterance of anyone who ever saw it). This is guarded by a monster which is initially unknown. King Arthur and his knights are led to the cave by Tim the Enchanter and find that they must face its guardian beast. Tim verbally paints a picture of monster so terrible as to have killed everyone who has tried to enter the cave, and warns them, 'death awaits you all - with nasty, big, pointy teeth!'
As the knights approach the cave and the rabbit, their 'horses' become nervous, forcing the knights to dismount. Sir Robin soils his armour upon merely seeing it, before everyone except Tim sizes it up as merely an innocuous white rabbit. Despite the cave's entrance being surrounded by the bones of 'four-fifty men' fallen, Arthur and his knights no longer take it seriously. Ignoring Tim's warnings ('a vicious streak a mile wide!' ), King Arthur orders to chop the rabbit's head off.
Bors draws his sword and confidently approaches it. The rabbit suddenly leaps at least eight feet directly at Sir Bors' neck and bites clean through it in a single motion, him to the sound of a. Despite their initial shock, Sir Robin soiling his armor again, and Tim's loud scoffing, the knights attack in force, but the rabbit injures several of the knights and kills and with ease. The knights themselves have no hope of killing or injuring the rabbit. Arthur panics and shouts for the knights to retreat ('Run away!'
Sir Robin asks if running away 'more' would confuse it. Knowing they cannot risk attacking again, they try to find another way to defeat the beast. The Holy Hand Grenade of Antioch is ultimately used to kill the rabbit and allow the quest to proceed. Holy Hand Grenade of Antioch. The of the United Kingdom, which The Holy Hand Grenade of Antioch satirisesThe Holy Hand Grenade of Antioch is a visual satire of the of the United Kingdom, and may refer to the mythical. The Holy Hand Grenade is described as one of the ' carried by Brother Maynard (Idle). Despite its ornate appearance and long-winded instructions, it functions much the same as any other hand grenade.
At King Arthur's prompting, instructions for its use are read aloud (by ) from the fictitious Book of Armaments, Chapter 2, verses 9–21, parodying the and the.And Saint raised the up on high, saying, 'O L ORD, bless this Thy hand grenade, that with it Thou mayest blow Thine enemies to tiny bits, in Thy mercy.' And the L ORD did grin, and the people did feast upon the and and and and and, and and large chu.
Vorpal Rabbit Game Play
At this point, the friar is urged by Brother Maynard to 'skip a bit, brother'. And the L ORD spake, saying, 'First shalt thou take out the Holy Pin.
Then shalt thou count to three, no more, no less. Three shall be the number thou shalt count, and the number of the counting shall be three. Four shalt thou not count, neither count thou two, excepting that thou then proceed to three. Five is right out. Once the number three, being the third number, be reached, then lobbest thou thy Holy Hand Grenade of Antioch towards thy foe, who, being naughty in My sight, shall snuff it.'
Arthur then pulls the pin, holds up the Holy Hand Grenade and cries out 'One! Sir Galahad (Palin) corrects him: 'Three, sir!'
(Arthur's is a running gag in the picture). Arthur then yells 'Three!' And hurls the grenade towards the rabbit. The grenade soars through the air – accompanied by a short bit of angelic choral acapella – bounces, and explodes. The killer rabbit is defeated, and the hapless knights errant continue on their quest.
The noise also attracts policemen who were investigating the murder of a historian by a mounted knight earlier in the film.Production. Steven Gale (1996).
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Rabbit Kills Human
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Vorpal Rabbit Game Download
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