Xu Jianren, who had disappeared for a long time, finally started the class on time, saying that he was going for a hair transplant, but it was quite effective.

It's just that this overly thick hair volume feels weird.

If he hadn't seen a real person, Chen Bo would definitely think that P had gone up.

"Students, I haven't seen you for a long time, it's been almost half a month."

Xu Jianren had a kind smile on his face, Chen Bo cheered up when he saw this, and he didn't dare to relax his vigilance, after all, he was a teacher who taught routines, and he could do anything as his name suggested.

"You're going to have exams this weekend, are you nervous?"

The students at the scene looked at each other, occasionally nodded slightly, and most of them were silent.

"It seems that everyone is ready, so I'll give you some hors d'oeuvres in advance."

Xu Jianren uploaded the questions in the display file to a public disk and asked the students to download them by themselves.

The amount of questions is not large, but it is all reading comprehension, Chen Bo glanced at it twice, and he couldn't wait to poke his eyes.

Chen Bo whispered: "It's the ghost question type that you guess I'm asking again, what is the meaning of its existence?" ”

"Help you understand a girl's mind." Wang Xu held the keyboard and mouse in his hand, like a combat-ready posture.

"The primary exam doesn't test reading comprehension, I think it's dissuading you from quitting." Chen Bo reluctantly connected the data cable.

"Don't be so pessimistic, anyway, this is not counted in the usual grades, and happiness is the most important thing." Wang Xu said lightly.

Chen Bo clicked on the first question, which is a video question, and the protagonist is the attendance machine.

[The history of the attendance machine can be traced back to the 70s of the last century, for the needs of enterprise management, the first generation of card attendance machine replaced the original manual recording of attendance, it is in a card made of metal for regular punching, through the light projection to distinguish the number of people]

[However, due to the fact that metal sheets are easy to deform and corrode, errors are often prone to occur in actual operation, so this kind of attendance method has not been widely promoted]

[The second-generation barcode attendance machine is improved and extended on this basis to generate a barcode image, which is convenient and fast, but still fails to solve the problem of projection distortion until the third-generation attendance machine is born]

What can be asked about this question? It's all test centers. Chen Bo glanced at the progress bar, it was only a third of the way, and the focus might be later.

[Magnetic card attendance machine has been prevalent for about 20 years with the memory of the post-80s and post-90s, and it is the most common way to punch in and out of that era.

The old colleagues in the department talked about this thing with Chen Bo, and often everyone took turns to fight, one person held a stack of cards and went crazy Dididi, and the one who attended early became an honest person, and in the end it evolved into formalism.

[In order to curb the increasingly serious phenomenon of punching in and out, the fourth-generation biometric identity attendance machine has been launched on the market, and the punch-in person needs to match all the corresponding fingerprints and iris in the database to successfully punch in]

Chen Bo also bought a fingerprint sleeve before, which was made of silicone plastic mold, which was more than enough to deceive the old-fashioned machine, and an advanced iris attendance machine was at least 6,000 yuan, which small businesses could not afford.

However, Maple Leaf is not a small enterprise, and the rear group has successively replaced the equipment, and unified positioning + face recognition has blocked all the possibilities of laziness.

The old fritters who are usually used to being casual are not used to it for a while, and the performance of the month was deducted by half, but fortunately, the project produced results in time, and part of the subsidy was returned from the allowance.

[The fifth-generation intelligent cloud attendance machine, through the seamless connection with the mobile Internet application, gets rid of the original fixed place attendance mode, and the punch-in personnel can perform various operations on the mobile phone]

After introducing the advantages and disadvantages of several generations of attendance machines, the video was edited to test the actual combat effect of the punch card tool, what Chen Bo didn't expect was that even under the double standard of positioning + face recognition, there are also cattle who can hide from the world.

"I can still accept virtual positioning, but artificial skin is too much."

Thankfully, this technology is expensive, and those who can afford it are basically not in the scope of attendance, and because it has certain social safety risks, it belongs to a strictly controlled industry, and the scope of use is limited to scientific research purposes.

The video came to an abrupt end here, Chen Bo combed the content from beginning to end, which can be divided into two parts, the first half is talking about the development history of the attendance machine, and the second half introduces several punch tools.

With his fingertips hanging in the air, Chen Bo looked at the blank answer board in a daze, there are too many places to ask questions, and there is no clear hint of the key points in the video, so it makes sense to start anywhere.

The Evolution of Time Attendance Machines and Social Evolution?

On the exploitation methods of unscrupulous entrepreneurs?

The self-salvation of the low-level social animals?

"Mr. Wang, what did you answer?"

"If you answer wrong, don't ask." Wang Xu's head didn't twist.

"Then help me eliminate a wrong answer." Chen Bo couldn't help but give up.

"I wrote about the method of screening virtual positioning, didn't the video introduce how to modify the location of the mobile phone to reach the punch in thousands of miles away? It's actually flawed, and I gave suggestions for improvement, but unfortunately it's not what I thought. ”

"You're so detailed."

"The answer is more detailed." Wang Xu gave further tips.

Chen Bo comprehended, it seems that the question is definitely not a superficial knowledge point, and the previous reference question has been overturned.

Returning to the video itself, Chen Bo watched it again, this time in more detail, trying to detect the overlooks.

In the check-in demonstration, it was mentioned that the UP owner copied his thumbprint with white wax in an attempt to unlock the iPhone, but failed, and he came to a negative conclusion based on the observed phenomenon.

As we all know, the unlock screen of the mobile phone and the recognition method of the attendance machine are different, the former is mainly capacitive recognition, while the latter relies on optical recognition.

In terms of recognition speed, capacitive recognition is better than optical recognition, and the same is true for recognition accuracy.

The fake thumb fingerprint has no temperature and cannot produce biocurrent, so it cannot trigger the mobile phone unlock screen, but it may not be able to have an effect on the attendance machine, and the conclusion reached by the up master is likely to be wrong.

This is also the limit of Chen Bo's ability, he can't think of anything else but to stubbornly point out the problems of the UP main inference.

"I got it right, hee-hee."

Seeing a green hook, Chen Bo showed a relieved smile, this brain cell consumption, he was hungry after completing a question.

Wang Xu said indifferently: "Congratulations, but Comrade Xu Jianren is really interesting, he actually used the exam questions of senior keyboard warriors to make things difficult for us." ”

"Isn't it, still human?"

"Come on, I'm wrong again on the second question." Wang Xu gasped and pressed the enter key hard.

"Material essay questions, it's all words, it looks a little faster." Chen Bo slowed down.

Wang Xu reminded: "Look clearly, 30,000 words, and it is in the nature of a paper, and the depth is not the usual essays." ”

Chen Bo: "......"

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