The hot summer in H City came a little early this year.

In the past few days, the maximum temperature during the day has reached 35 degrees Celsius.

If this continues, won't it be 41 degrees Celsius in July and August?

Today, Song Xuelu wore cool cropped pants, a white T-shirt, white breathable sneakers, a simple necklace without makeup, a small bag in one hand, and a sun hat in the other.

This outfit is simple, elegant, fashionable and avant-garde, highlighting the graceful figure of the goddess and showing her gentle and fresh atmosphere.

This weekend, she is going out to handle charity matters.

Ma Lan, who was sitting in the living room, saw her daughter-in-law getting ready to go out and gave her a gentle reminder:

"Xuelu, the weather is getting hotter. The highest temperature today is 35 degrees. Pay attention to sun protection."

Song Xuelu smiled gently: "Auntie, okay, I have sunscreen with me. I'm leaving first."

Mu Yang, who had not yet gone out, walked behind Song Xuelu and muttered: "Mom, why didn't you ask me if I brought it with me?"

Ma Lan didn't take it seriously and said, "It's okay if you get a little tan. You'll look healthier if you get a tan."

"Yes, you might as well look like a pretty boy." Mu Xiaoling, who was sitting at the dining table eating breakfast, complained.

Mu Yang saw his sister having breakfast and nagged: "It's almost half past eight. You're up so late. How are you, the third model?"

"..."

Mu Xiaoling didn't want to talk for a moment. She lowered her head to eat her breakfast, mumbling: "Can you chat? Don't mention your grades all the time."

The whole family can go out to play on May Day, but she needs to stay in school to make up for classes. There are only fifty days until the college entrance examination, so let's finish it as soon as possible.

Song Xuelu said hello to Mu Xiaoling and came to the gate of the villa. At this time, a black Mercedes-Benz S500L was waiting for her at the gate.

The female bodyguard opened the back door for her, and another female bodyguard was responsible for driving.

Now Mu Yang's family is always accompanied by bodyguards when traveling, so they are careful not to make big mistakes. If something does happen, there is no regret medicine.

Mu Yang worried a lot about his family's bodyguards.

My family are all professional bodyguards.

The veterans that Mu Yang hired himself have to go to a formal bodyguard company for professional training in the past few months, especially in the area of ​​assault protection reaction ability. He has very strict requirements.

If the enemy really wants to harm the protection personnel, the bodyguards will only have a few tenths of a second to react, and they must take protective measures in time.

In addition to bodyguards, Mu Yang and his family also need to conduct training in this area from time to time on how to protect themselves more quickly when emergencies occur.

Mu Yang thought of the incident that shocked the world in 2022. If the boss didn't look back when he heard the gunfire, but immediately squatted down or even lay down and held his head, maybe nothing would happen. Sometimes, the bodyguard would be distracted.

The reaction ability is not that fast.

When Mu Yang saw Song Xuelu leaving, he sat at home for a while, drank a glass of hot milk, and then left too.

The weather is getting hot, and he wants to patrol the workshop.

The company will distribute Huoxiang Zhengqi water to workshop workers. Although the supply is not limited, it cannot be received in large quantities.

Some people are weird, drinking this as wine, and drinking dozens of bottles at a time. The workshop does not allow drinking while working, so at noon, the canteen is not open for beer supply, but drinks are open for supply.

Some workers like to drink while eating. They can drink half a pound of liquor without getting drunk and can still go to work, but this is not allowed in Xinghai Group.

…

Xinghai Group, headquarters base.

In the sixth class of mechanical engineering in the junior year of the Polytechnic University, all the students in Mu Yang’s class had an internship in the machine processing workshop.

These students have to help the master work. When they are free, the master will teach them how to operate the machine tool simply.

However, Xinghai Group is busy with production, so the master can only teach when it does not affect production.

The equipment of Xinghai Group is very advanced. Most of these students will work in Xinghai Group after graduation. This is why Muyang asked his classmates to come to the company for internship. Each student is required to be familiar with the basic operation of at least one piece of equipment, measure the products by themselves, and

Draw it and understand its machining process. The learning period is two weeks. After the completion of the study, there is a real metalworking internship task in the school.

Students in other classes, however, do not enjoy the privilege of operating equipment at Xinghai Group. At best, they can only observe, and the observation ends in one or two days.

The University of Technology has a special internship base, such as turning, milling, planing and grinding machines. According to previous years' internship programs, each student must learn to operate a lathe, use pliers and saws, and process a threaded hammer, that is, a lathe hammer handle +

In addition to meeting some of the size requirements, the shape of the fitter's hammer can be freely DIYed. Once completed, you can keep it as a souvenir for yourself, and you can use it to crack walnuts in your dormitory.

Through internships, these students can understand how big the gap is between reality and ideals.

Machining is only one of the practical contents. The learning period is generally one week, and there are other internship contents.

Today, they have finished their study tasks for the day and are preparing to leave in groups.

Suddenly, the students in the class saw a familiar figure.

"Hey, look, everyone, isn't that Boss Mu?"

"Well, yes, he probably patrolled the workshop. I haven't seen him for a long time. I don't know what he was busy with. Fatty, do you know?"

"I don't know, I didn't ask, I'm just busy anyway." Mu Yang's roommate Fatty shook his head.

"Xinghai Group is developing too fast. Think about my freshman year, when Boss Mu started to build the company. I remember coming over to help with the cleaning."

"Haha, yes, I asked you to come here. It costs tens of dollars per person." The fat man still remembered, "Xinghai Group is developing at a rapid pace. By the time we come back next year, Xinghai Tower will have been built."

In the machining workshop, they saw all kinds of advanced domestic machining equipment and automated machining lines. The master workers said that in other large factories, they could not see such advanced machining workshops with such advanced 5S management.

good.

After finishing speaking, the fat man said, "Hey, I can't help it, Mu Yang is so outstanding!"

"Yes, even if he doesn't work in the business world, even if he has no connections and background, and becomes a civil servant, with his looks, if his superior is a female leader, as long as he is willing to sacrifice his looks, he will be promoted very quickly." Li Ming

Said seriously.

Luo Xiaomin smiled evilly: "Haha, if his female leader is in her fifties and has no needs in certain aspects, then Yangzi may not be able to handle it."

Li Ming waved his index finger: "What do you know? The evil waist is like a wolf at thirty, a tiger at forty, and sitting on the ground at fifty can absorb soil."

Fatty saw his two roommates teasing Mu Yang and smiled lightly: "You guys are teasing Boss Mu on someone else's territory, be careful he hears it."

"No, he is still ten meters away from us."

"Yes, I've already recorded it." The fat man raised his phone and smiled.

"Fuck, Fatty, you are so insidious, delete it immediately. If I can't join Xinghai Group after graduation, it will definitely be your problem." Li Ming and Luo Xiaomin knew that Fatty was joking, but what if Mu Yang really cared about this matter.

“Two hot pot meals.”

"Fuck you, fat man, are you threatening us?"

"How about three meals?"

"Just two meals, we choose the location."

Thus, the "deal" between Fatty and his two roommates was settled.

In fact, he didn't record it.

Mu Yang also saw the classmates, walked over, said hello to them and left.

In order to produce and sell wearable air conditioners, Muyang specially established Xinghai Outdoor Equipment Co., Ltd. and established a R&D team of 20 people to be responsible for the verification and subsequent research and development of new basic products.

For each R&D project team of Xinghai Group, the basic model is provided by Muyang. The R&D team first thoroughly understands the technology, verifies and develops samples, mass production, R&D and optimization of other styles, and innovation. Muyang will no longer participate.

Seven members of the wearable air-conditioning project have registered. The team leader has already reported and can start work. Mu Yang held a meeting and handed over the information to the project team members, requesting that mass production be achieved before July this year.

If you miss this summer, you will have to wait until next summer to launch it.

So, time is very tight.

A few days later, Mu Yang opened his mailbox and found that the editors of the two conjecture papers he submitted had already replied to him, indicating that the manuscripts had been sent to review experts on an expedited basis and were currently being reviewed.

Wait patiently.

Submitting a paper to multiple journals is the act of submitting one manuscript to multiple journals, and this behavior is expressly prohibited in academia.

However, if you do not receive a notification from a newspaper about the decision to publish within fifteen days from the date of issuance of the manuscript, or if you do not receive a decision from a periodical publisher within thirty days from the date of issuance of the manuscript, you may submit the same work to other newspapers or periodicals.

Contribute.

I received the review information, the manuscript was not rejected, and I had preliminary communication with the editor.

The editor-in-chief was also an elder in the field of mathematics. He said that the problem with the paper was not big, but the process still had to be followed. Mu Yang knew that the first step was successful.

The next step is to wait for the review by the math boss.

This time is relatively long, and since these two magazines publish bimonthly, the fastest publication usually has to wait until the next issue is published, which is at least two months.

Of course, if it is an emergency, something like speculation, we will rush to publish it in the current publication.

The editor knew the author's information and carefully checked Mu Yang's background. He was surprised to find that he was a young rich man and an inventive genius.

If Mu Yang can really prove his conjecture, the world of mathematics will be very lively this year.

In the next ten days, Muyang focused on tracking the wearable air conditioner project.

Wearable air conditioners have two key components.

The first key component is the semiconductor refrigeration element. This component is not expensive and is available on the market.

Depending on the voltage and power, the voltage of the micro semiconductor refrigeration chip is generally 3V, 3.7V, 5V, and the power ranges from 1W to 10W.

The size of low-power semiconductor refrigeration chips is not large. The common length and width on the market are 40*40mm. The thin ones are extremely light and cost more than ten yuan. The high-end ones are sold for hundreds of yuan in the market.

Muyang's wearable air conditioner will use a 3.7V, 3W semiconductor refrigeration chip.

This will be independently developed by Xinghai Group. Its technical level can reach the world's top level and its energy consumption is lower. According to the technical introduction, the power is better than the refrigeration effect of a 6W semiconductor refrigeration chip.

It cools down quickly, but will not go below zero, which is the main reason for extremely low energy consumption. If the local temperature is too low, the human body cannot bear it.

The second key component is a rechargeable compressed lithium battery, which is no different from a mobile phone lithium battery. The main cost and weight of the wearable air conditioner lies in this.

The price of mobile phone lithium batteries varies greatly. For a battery capacity of 3000 mAh, the current market price ranges from 20 yuan to 200 yuan depending on the brand.

As for the weight of lithium batteries, mobile phone batteries with larger capacities will definitely be heavier, and batteries with smaller capacities will be lighter. Currently, the mainstream 3000 mAh battery is about tens of grams, and larger batteries will be lighter.

Others, such as the casing of wearable air conditioners, use plastic casings, which are not worth much and have no weight.

The production cost of a vest is also extremely low. In the final analysis, it mainly depends on the material used in the garment.

If manufacturers mass-produce semiconductor refrigeration chips and batteries, production costs can be reduced to very low levels.

Then, there may be a problem.

Can this lithium battery afford the power consumption of a semiconductor refrigeration chip?

the answer is:

no problem!

This has to be calculated from the battery capacity and usage time.

At present, most mobile phone battery capacities are between 2500-4500mAh.

mAh is the unit of battery capacity, 1mAh=0.001 Ampere*3600 seconds=3.6 Ampere seconds=3.6 Coulombs.

The most direct calculation method:

1. First get the current of the electrical equipment.

2. Then divide the battery capacity by the current of the electrical device, and the result is the usable time.

For example:

A 3000mAH battery with a rated voltage of 3.7V supplies power to an electrical device with a power consumption of 3W and a voltage of 3.7V. Its theoretical usage time is:

I=P/U =3W/3.7V= 0.810A =810mA

h=3000mAH/810mA=3.7 hours

[Remarks: The nominal voltage of general mobile phone lithium batteries is 3.7V, the full voltage is 4.2V, and the limited charging voltage is 5.0v]

A set of wearable air conditioners has two semiconductor refrigeration chips at the front and rear. The design plus quick-drying clothes does not exceed 280 grams, and the required use time is about 3 hours. This is achievable.

As for production costs, as long as the quantity is large enough and evenly distributed, all types of costs will be extremely low.

If the sales volume is not large, you can only sell 10,000 to 20,000 pieces a year, and selling for thousands of yuan a piece may not necessarily make a profit.

Later generations of Suoni wearable air conditioners have average sales, the brand is priced at a premium, the clothes are of good quality, and they are sold in island countries, which is why it is so expensive.

When DVDs first came out, each set cost tens of thousands of yuan, but now it costs about two hundred yuan.

Big Brother, initially sold for tens of thousands of yuan, is produced with current technology and processes, and upstream materials are cheaper, so the production cost may be only a few dozen yuan.

For electronic products, after the production volume is large, the production cost can be reduced to an extremely low level.

Originally, the production cost of the most basic version of the wearable air conditioner designed by Muyang was 130 yuan. After the purchasing department consulted the prices of various manufacturers, the actual production cost will be higher, probably around 160 yuan, and the comprehensive cost will reach 190 yuan.

So, the original sales volume was lower.

However, if annual sales of more than 5 million units can be achieved, in a year or two, the prices of semiconductor refrigeration chips and lithium batteries will also fall, and the production cost of the basic version of wearable air conditioners can also be reduced to 130 yuan.

By the end of May, the R&D personnel of the wearable air conditioner project team have arrived, and the project research and development has officially entered sample manufacturing status.

This wearable air conditioner is not complicated. The lithium battery, plastic outer shell, and clothes are all purchased and customized, and there is no need for Xinghai Group to produce it itself.

Semiconductor refrigeration fins, as the core technology, are manufactured by Xinghai Group and are arranged in the No. 5 steel structure workshop of the headquarters base. This workshop is also named the "Outdoor Equipment Production Workshop."
Chapter completed!