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Nine questions about the island.

One question said:

Now it is expected that the island, stand two tables, three feet high, a thousand steps before and after, so that the back table and the front table are straight. In the past, the table walked one hundred and twenty-three steps, and people looked at the peak of the island with their eyes, and joined the end of the table.

From the back table, there are one hundred and twenty-seven steps, and people look at the island peak, and they also participate in the end of the table.

Q: What is the height of the island and how much does it go to the table?

Answer: The island is four miles high and fifty-five steps; One hundred and twenty miles and one hundred and fifty steps to the table.

The technique says: multiply the height of the table by the table; More is the law, except for it. The income is higher than the table, that is, the island is high.

Those who seek the distance of the former table to the island: the former table is true between the tables; A lot of it is the law. In addition to that, the island goes to the table.

The second question said:

Today is expected to be on Songsheng Mountain, I don't know how high or low.

Stand two tables, two feet high, fifty steps before and after, so that the back table and the front table are straight.

In the past, the table traveled seven steps and four feet, looking at the pine dust from a thin distance, and joined the end of the table. Looking at Songyuan again, he entered the table at two feet eight inches.

From the back of the table, it is eight steps and five feet, looking at the pine powder from a distance, and it is also in line with the end of the table.

Q: Pine height and mountain to table each geometry?

……

Zhu Gaochi reads every issue of the technical newspaper, and the original intention of coming up with the technical newspaper at the beginning was to integrate technology and create the style of academic newspapers in later generations.

But after all, the times are different, people's ideas are also different, and the people of the technical newspaper have not seen the academic newspapers of later generations.

In their understanding, the technology newspaper deviated from Zhu Gaochi's original intention and became a hodgepodge, including all things.

The content of the newspaper became more and more, and the length of the newspaper became longer and longer, and the longest issue of each issue of the newspaper was thirty or forty pages long, and even published a miscellaneous note.

However, Zhu Gaochi did not intervene in the correction.

In his opinion, as a superior, he must guide the direction, but he can't manage too carefully, which restricts the initiative.

"Who said there was no geometry in ancient China." Zhu Gaochi put down the technical report in his hand and couldn't help but shake his head.

The author of the Island Sutra was a Han Chinese during the Wei and Jin dynasties.

He was the first person in the world to come up with the concept of decimal decimal numbers and use decimal decimal numbers to represent the cube roots of irrational numbers.

In algebra, he correctly proposed the concept of positive and negative numbers and the rules of addition and subtraction, and improved the solution of linear equations.

In terms of geometry, the "circumcision" is proposed, which is a method of exhausting the circumference of a circle with inscribed or inscribed regular polygons.

The result of pi π≈ 3.1416 was scientifically obtained by circumcision.

He used the circumcision technique to start from a circle with a diameter of 2 feet and a regular hexagon, and then obtained a regular 12-sided and a regular 24-sided ......, and the finer the cut, the smaller the difference between the area of the regular polygon and the area of the circle.

In his original words, "the cut is fine, the loss is small, the cut is cut again, so that it cannot be cut, then it is combined with the circumference and nothing is lost." ”

He calculated the area of the 3072 polygons and verified this value.

The scientific method of calculating pi proposed by Liu Hui has established China's leading position in the calculation of pi in the world for more than 1,000 years.

The excellence and leading position of ancient Chinese technology has never been more than that without roots, but with theoretical support.

General Division, Reduction Division, Four Operations, Complex Fractions, Prescription, Multiplication, Reduction, Homogeneity, Equations, Pythagorean ......

Created Yang Equestrian Technique, Mu He Fang Gai Said, Equation New Technique, Heavy Difference Technique and so on.

The masterpieces include "Nine Chapters of Arithmetic", "Sun Tzu's Arithmetic", "Zhou Ji Sutra", "Island Sutra", "Zhang Qiujian's Sutra", "Ten Books of Arithmetic", "Nine Chapters of Arithmetic", "Nine Chapters of Mathematics", "Enlightenment of Arithmetic", and "Principles of Arithmetic......

Just as ancient Oriental technology spread to the West, the knowledge of these books can be clearly seen from the time when they were first published in various countries, and the general context is Chinese numerals, Indian numerals, Arabic numerals, and European numerals.

Before the spread of Chinese mathematics to India, India also had its own notation system, but this notation system was as cumbersome as the Mediterranean, and it was not a place-value system.

When the Chinese notation system spread to India, the Chinese nine-chapter arithmetic also spread to India.

The most ironic thing is that some of the mistakes in the arithmetic of the nine chapters have been repeated in India and copied exactly.

Mr. Wu Wenjun, an academician of the Chinese Academy of Sciences and a mathematician, and Mr. Qian Baocong, a famous Chinese historian of mathematics, and other university scholars.

Their view is that the invention of Western calculus is the product of the victory of Chinese mathematics over Greek mathematics.

It can even be said that the reason why modern mathematics has been able to develop to this day is mainly due to Chinese mathematics, not Greek mathematics, and it is mainly Chinese mathematics rather than Greek mathematics that determines the development process of mathematics.

Based on this appeal, history that has been turned upside down must be turned upside down!

In Mr. Wen Xing's "Missionaries Steal Chinese Civilization and Turn World History Upside Down", Mr. Li Liang's article "The "Missing" Eating - Missionaries' Selective Deletion of Eating Records in the Chongzhen Reform Period" and so on.

A large number of empirical evidences are described, as well as the sequence of the development of mathematics in various countries, which can be clearly corroborated.

In Mr. Xiang Guanjie's "Achievements of Ancient Chinese Mathematics", it is proposed that since the Yuan Dynasty, Chinese mathematics has been discontinued.

A hundred years is enough time to smooth out the inheritance.

It was not until the middle of the Ming Dynasty that some new works began to be published, but mainly the restoration of the mathematical level of the Song Dynasty did not bring forth the new.

Then came the Qing Dynasty nearly 300 years later, when the recovery period of mathematics in China was interrupted and completely declined.

Just as it is not denied that the United States will be strong in later generations, the strength of the United States is contained in its overall national strength, not out of thin air.

Then the achievements of ancient China are the pinnacle of the world, and they must also have a history, not duckweed without roots.

Like the Americas.

The Inca Empire, which lived alone on one side of the world, was the overlord of the Americas, and its civilization and knowledge were equally the strongest and most advanced among the indigenous countries of the Americas.

Then ancient China was the strongest in the world, and naturally the same is true, the strongest and most advanced in the world.

The hundred-year history of humiliation, coupled with the harsh external environment, actually made Zhu Gaochi's inner confidence not very strong.

Zhu Gaochi couldn't help but get up, left the desk, and walked to the gate, and the guards surrounded him, thinking that the little prince was going out.

Zhu Gaochi shook his hand and walked alone in the courtyard.

In the early Ming Dynasty, he had concerns about the development of the industrial revolution, and he held some prejudices, which made him not very confident.

Can I promote the industrial development of Daming? Lead the distribution of social productive forces and accomplish the goal of industrialization.

Like a person who sails against the current, can he really succeed?

Now he no longer doubts.

Because he is not a person, the technological achievements of the ancient ancestors are the nourishment for his success, and what he lacks is just an opportunity.

Even if it is just to restore the scientific and technological civilization of the Song Dynasty, coupled with the military capabilities of the Ming Dynasty, the industrialization of the Ming Dynasty can be successful.

With the development of the technology newspaper, more and more ancient knowledge has emerged, allowing more and more craftsmen to communicate, and driving more technical integration.

Port Arthur.

Originally for Shandong Denglai two states to supply Liaozuo region, by Hongwu four years, Ming Taizu Zhu Yuanzhang sent Ma Yun, Ye Wang two generals, led the army from Penglai to cross the sea here to land here to recover Liaodong, because the sea journey was smooth sailing, then the lion's mouth was renamed Lushunkou, has been used.

The wharf at Lushunkou, fifty miles away, built a large amount of fertile land, and used a large number of steam engines when clearing the wasteland.

The steam engine went from being a coarse and simple machine at the beginning of its birth to using the most advanced technology.

For example, the piston is made of fine iron to achieve the highest efficiency of the steam engine.

Nowadays, there are more technical reserves and improvements to the components, such as changing the piston with more advanced materials to pig iron, so that the piston can operate more efficiently in the cylinder.

In other words, the steam engine has changed from blindly using the best materials to requiring the most suitable and effective materials.

As a result, the steam engine became smaller and the power did not become smaller, but became larger.

Similarly, the use of fuel has become more efficient.

With the same volume of fuel, the current steam engine can burn longer, produce more horsepower, and let it leave the coal mining area, but also make the steam engine effective.

It is an important reason why the British Industrial Revolution was able to be learned from Italy and France, because the progress of steam engine technology made it affordable to use steam engines in areas lacking coal mines.

The fact that the steam engine could be used in large quantities in Lushun seemed to be only a small step in technology, but in fact marked the beginning of a great era.

In an agrarian society, resources are very expensive, so when resources need to be used, society needs to pay a great price.

Therefore, the development of the Ming Dynasty was very slow, and it was only in the Ming Dynasty that the population of the Northeast recovered to more than three million.

And now at the beginning of the Ming Dynasty, it is still in the stage of military immigration to the north.

But industrialized societies are different, resources are no longer expensive, they can be used in large quantities, and industrial products from mineral resources have become cheaper.

This impact covers many aspects, such as agriculture, and the cost of clearing wasteland has also dropped significantly.

As an overseas base built by China Heavy Industries, Lushunkou District has invested a lot of technology.

Trench excavation, water conservancy, house construction, material harvesting technology, salt production technology, shipbuilding technology......

It is not a problem for the craftsmen of the Ming Dynasty, it is their specialty, and what is lacking is only the security facilities.

And the China Heavy Industry, which guides Beiping industry, is most lacking in resources.

Thousands of eunuchs are in good order, and with the hard work of the war industry, they have provided the most powerful guarantee for the development of Lushunkou.

The most painful, tiring, and life-consuming preliminary work has been laid by them, and people recruited from the country only need to take over according to the dispatch of the forest farm, and then live diligently to obtain a relaxed living environment.

This model, which greatly reduces investment, has been welcomed by the people and attracted more people.

In the new report of the forest farm, the grain in the forest farm has been piled up, new warehouses are still being built, the dockyard is being built one after another, and there are not enough people who are worried about the boat.

The goods of the salt works, freezers, and salted fish factories are also piled up in the warehouse, and I hope that the headquarters can take care of it.

(End of chapter)