Cyber ​​Heroes

Chapter 897 More Questions
Xiang Shan probably understood.

In other words, the only thing that stunned Xiang Shan for a moment was the example Ingrid gave.

He hadn't expected to hear such... strange examples on this occasion.

But other than that, there doesn't seem to be anything more valuable.

It can only be said that any professional, after going beyond his professional field, is not wiser than ordinary people.

While Ingrid thought the way these aliens wrote was hilarious, it came down to a compression algorithm.

And this couldn't explain the problem Xiang Shan was thinking about now.

"The design drawings, assembly process, and material manufacturing parameters of all alien machines, plus their own running AI, how can they be compressed to the level of two to three hundred MB."

Alienware uses two compression algorithms.

One can be roughly called "dictionary algorithm", that is, "use the permutations and combinations that appear frequently to make a corresponding dictionary, and then use the number code in the dictionary to replace the combination".This method is also used by humans.Of course, if the "dictionary" is made very large, then the data ontology can be compressed very small.But sometimes, the situation that "the dictionary is bigger than the data body" will be formed.

The aliens probably chose an appropriate value to ensure that the size of the "ontology + dictionary" is the smallest.

The other is the two-dimensional symbolic matrix that Ingrid said.

But no matter what, the lossless compression of information must have a limit.

And this two-dimensional matrix algorithm, no matter how fancy the aliens design the reading rules, it has an "upper limit".

As Yingjia said, if you add a symbol of "the next termination/direction symbol is invalid", it can increase the number of reading routes, but it will cause a large number of symbols to be mixed in except for the "next termination/direction symbol". There are no other symbols with any meaning other than "invalid", and items are also added to the collection of "dictionary".

The increase of "reading routes" will lead to "too many symbols that are only related to reading rules" and the expansion of "dictionary".

Like the dictionary algorithm, in the end, there will also be a problem that the size of the "reading rule" is larger than the size of the data body.

There is also a balance here.

According to Xiang Shan's estimate, there may be only a few symbols about the reading rules, not too many.

There is another problem with two-dimensional symbolic matrices.Just like a "crossword puzzle", a symbol on a spatial coordinate is subject to constraints from four directions.This instead makes the expression of information not as free as one-dimensional text.

"Let's use the example you gave..." Xiang Shan said: "Although the ancient poet compressed 840 poems in 950 words, I'm sure that the [-] will be as good as possible. Of the [-] poems, none of them can be handed down through the ages if they are dismantled separately, maybe there is still something...the rhythm and rhyme are not so neat."

Ingrid was a little curious: "You look like you just learned about this stuff..."

"If the poems extracted from that word game are good enough, they will definitely be used in textbooks. Then I will definitely have an impression." Xiang Shan is very convinced on this point: "If you think about it carefully, most of the ancient times did not have punctuation marks, and sentences must be broken. Later generations will guess..."

Ingrid covered her face: "I guess you want to say 'read'."

Xiang Shan ignored Ingrid's prompt: "Look, from this point of view, this kind of word play, the compression of information, has a great loss, and the efficiency is just that. It's not even 'compressing any eight thousand poems' , Judging from the annotation of the compression algorithm... hiss..."

Xiang Shan seemed to realize something...

——It's not "compressed any eight thousand songs"...it doesn't have to be compression...

--what……

Xiang Shan seemed to have thought of something.But the inspiration of that "what" conflicted with his thinking all the time.This hard-won idea just slipped from Xiang Shan's consciousness and disappeared.

Xiang Shan stood up and scratched his head: "What am I going to say..."

Ingrid sat on the stool and looked up at the friend who suddenly became nervous: "That...'From the annotation of the compression algorithm'?"

"Based on the standard of compression algorithms, this thing is nothing special..." Xiang Shan continued to think: "Information that is not afraid of distortion...Why..."

Do not……

It should be said that this information is definitely not "not afraid of distortion".

Otherwise, the aliens can completely use a storage method with higher information density instead of this symbolic slate.

Using this symbolic slate means that those extraterrestrials are also very afraid of accidental noise.They chose means that are extremely robust against noise but not high in information density.

Noise immunity, information density, "dictionary" and "reading order rules" and "compression ratio", and information that may be lost during compression...

"I still don't understand..." Xiang Shan whispered.

In fact, this question plagued almost everyone who stayed at Project Rama.

Progress on this front has all but stalled.

Fortunately, "Study of Alien Legacy" is a huge project, which can be divided into many sub-projects. The progress in this aspect is not good, and it will not affect the progress in other aspects.

For example, researchers from Europe have speculated on what happened to "Ogun" when it landed on the earth based on the recorded "last position of scrapped robots".

According to simulation calculations, these machines have all been scrapped very early.But at the same time, Ogun's engine stopped working long ago, and there was almost no overall acceleration, so these scrapped robots were concentrated in the second half of Ogun in a state of weightlessness, and a weak movement occurred as the piece passed by. deteriorating.

In the end, these scrapped robots collided fiercely amid artificial acceleration and deceleration.

In other words, these scrapped robots were originally concentrated on the side of Ogun near the engine.

Most likely they were scrapped according to the procedure.

But this brings up a whole new problem.

"Why are these robots shutting down?"

There are also many raw materials in Ogun.These robots also make extensive use of alloys that are cheap to recycle.The material as uniform as possible is also to reduce the difficulty of recycling.Therefore, the reincarnation of "one generation copying one generation" should not be cut off yet.

Not even the fission fuel stored in Ogun was exhausted.

This cyclical process has not reached its theoretical limit.

It must be something wrong.

But on the other hand, humans have not found traces that can prove the "fault".

Perhaps the evidence had been lost on the way to the ground.

Or, the form of the lockout is a bit beyond imagination?
(End of this chapter)