Siheyuan: The opening earthquake of stealing and replacing pillars

Once a woman starts talking, it can be earth-shattering. Zhu Lin vividly described the gossip in the courtyard, and the old lady was not to be outdone, and actually revealed scandals from the Republic of China period, such as how Xu Zhimo pursued Lin Huiyin, which woman the great writer Hu Shi had an affair with, how romantic Zhou Shuren was in those days, and so on.

Oh my God, isn’t Zhou Shuren Master Lu? Zhu Lin was so shocked that she couldn’t close her mouth.

"It's time to eat!"

I don’t know how long they talked until He Yuzhu’s voice was heard, and then Zhu Lin helped Professor Lin out of the study.

The old lady already knew what He Yuzhu did in the past, because Zhu Lin praised him to the sky, saying that he had no rival in the world.

But seeing is believing. When she looked at the things on the table - the lush green vegetables, the shiny egg yolks, and the shriveled pickles she often ate, which were now oozing with oil, not to mention the bowl of millet porridge, which was slightly sweet in its heat and whetted her appetite.

He Yuzhu saw the surprise in Professor Lin's eyes and said apologetically, "Old lady, let's have a light meal today to cleanse our stomachs. We'll eat crabs another day!"

Probably knowing what kind of person he was, Professor Lin said without hesitation: "Haha, I'm in for a treat!"

As she said that, she sat down at the dining table, picked up some vegetables and started eating.

He Yuzhu also greeted Zhu Lin and said, "Come sit down, come sit down, this place is like home, classmate, please don't be polite!"

"Virtue!"

As expected, Zhu Lin rolled her eyes.

During the meal, the old lady was extremely quiet, behaving like a lady from a noble family. As for Zhu Lin, she was almost the same. It was mainly because the atmosphere was right and she was a woman, so she had to follow suit!

But He Yuzhu was more noisy and always wanted to strike up a conversation with the young wife.

But Zhu Lin didn't want to pay attention to him at this moment. The character she had worked so hard to build up couldn't be destroyed just like that.

He Yuzhu felt bored, so he turned on the radio and listened to the Kunqu opera, nodding his head as if no one was around, just like he was at home.

Professor Lin looked at the interesting couple and burst out laughing. He remembered that when his husband first came to visit him, he was also so friendly.

Of course, the society back then was not as open as it is now, and there were still many rules. However, his unrestrained behavior won his father's favor, who said that a real man should not be fussy about trivial matters. If he was not his sweetheart, the two of them would have become close friends regardless of age difference.

After lunch, the old lady was going to take a nap. He Yuzhu cleaned up the kitchen and took Zhu Lin away.

The sun is still scorching in August, especially in the south. The heat is also accompanied by a stuffy atmosphere, making people feel as if they are short of oxygen.

"Rain Pillar!"

Zhu Lin, who was walking behind, suddenly shouted as she stepped under the shade of the tree.

"what?"

He Yuzhu turned around and saw that he was smoking and had been holding it in for several hours in Professor Lin's house.

"What will you do when I get old?"

"When you're old?"

"Ok!"

“Then I’m not young anymore!”

Hehe, with the system, maybe I can even achieve immortality!

"Oh, that's not what I meant!"

Zhu Lin stomped her feet in anger. She didn't get the answer she wanted. Women are more emotional and want romance. So you can choose not to answer, but if you have to answer, you can't give a wrong answer.

Obviously, He Yuzhu's answer was wrong.

"Then ask again!"

"What will you do when I get old?"

"Who said that?"

"I said—ah, I was just speaking metaphorically!"

"For example, if it's my friend, why would you hit him?"

"He Yuzhu, I'm talking to you seriously!"

"Well, let me ask you this too, what will you do when I get old?"

"Of course I'll stay by your side!"

"So, with you guarding me, I can't do anything else!"

"Then if I don't guard you, you can do other things?"

"I didn't say that!"

He Yuzhu walked forward with a guilty conscience.

"I see that's what you think, Mr. He, please make your statement clear!"

Well, it was originally a romantic thing, but in the end it turned into a love-hate drama. Director He, why are you doing this?

After walking and scratching their heads all the way, when they returned to the hotel, the young wife was still angry. Director He had no choice but to use his trump card. He quickly wrote down the lyrics and composed the music on the spot. The name of the song was "When You Are Old"!

"When you are old, your hair is white, and you are sleepy. When you are old and can no longer walk, you take a nap by the fire and recall your youth. How many people have loved you in your youthful days and admired your beauty, whether they were sincere or not. Only one person still loves your pious soul and the wrinkles on your old face..."

When He Yuzhu sang this song with his modified voice, Zhu Lin forgave him immediately. There was no other way. When the pure and moist singing voice came out, time and space seemed to freeze. She was immersed in the ocean of notes. Even without accompaniment, that warm and magnetic voice could interpret the warmth after experiencing the vicissitudes of life in a delicate and unpretentious way. It was very touching!

Looking at the man's melancholy eyes, the young wife fell in love with him again, and it was out of control...

After breakfast on Monday morning, Zhu Lin went to the hospital to ask for leave. She wanted to spend more time with He Yuzhu. It was a rare opportunity to come here, and there were many attractions that she had never been to, so she didn't want to go back with regrets.

But the old man didn't want to leave at this time.

"Wife, I want to stay with you!"

Zhu Lin's eyes lit up and she said, "You're lying. What about your schooling?"

After all, with the company of your lover, you won't be too lonely at night. This is a common problem for married women.

"Hey, there are more students this year, and the teaching is not uniform, so it's not a big deal to go two days late!"

"Then you have to say hello to the school too!"

"You don't have to worry about this. I'll call the factory director later and tell him that I'm doing research here!" He Yuzhu said shamelessly.

Zhu Lin thought he was bragging, so she didn't take it seriously and just got dressed and left.

He Yuzhu lay on the bed for a long time before going downstairs. He had already thought of an excuse. What kind of research is this? It's just plagiarism. You ask where it was copied from? Of course it was from the system. He himself was not engaged in scientific research. Even if he had tinkered with a lot of gadgets when he was in school, it was at most a hobby and had nothing to do with invention.

The housekeeper has long said that systematic teaching is icing on the cake based on the knowledge it involves. It is not omnipotent, so it has limitations. But even so, it is enough. For example, the principle of the "brushless electric excitation motor" is very suitable for current development. Its advantages will not be elaborated on. The "magic weapon" invented by the death row prisoner before his death has influenced various industries in later generations and is definitely a cutting-edge invention at the moment.

In fact, there are already many mechatronic motors nowadays, such as "permanent magnet brushless DC motor", "thyristor motor", "switched reluctance motor", etc., all of which are realized by using old-fashioned structure and electronic external control technology. Note that it is external control, not built-in!

Perhaps no one thought of using Hall sensors as a substitute. After all, they were only invented in the mid-1950s, and the external control unit also uses very simple transistors. In terms of efficiency and cost, it only saves carbon brushes, but there are no other advantages.

The so-called "permanent magnet brushless motor" uses the rotor as the permanent magnet. Permanent magnets are easy to demagnetize, but we learned in middle school that electricity generates magnetism and magnetism generates electricity. A energized coil can generate a magnetic field. Therefore, a energized coil can completely replace the permanent magnet. This is called electrical excitation.

Brushless means there is no commutator (also called carbon brush). For a single-phase motor directly driven by direct current, if there is no commutator, the motor can only rotate half a circle. How can it rotate the other half a circle?

It’s easy. Just reverse the positive and negative poles of the DC power. The commutator plays the role of changing the polarity of the power supply. But what if the commutator has a short life?

Use modern power semiconductor circuits to convert direct current into alternating current with variable direction. In this case, carbon brushes are no longer needed, as shown in the figure.

According to the patent of the death row prisoner, this is a motor with low cost, high efficiency, material saving and suitable for large-capacity, high-speed equipment and low-speed torque transmission!

Since there are so many benefits and the country just needs it, what else is there to think about!

Rest in peace, Brother Li!