Which is more difficult to learn and has better professional prospects in economics or finance?

Hall coefficient calculation formula: η=G/nF. Hall effect refers to the phenomenon that when a solid conductor is placed in a magnetic field and a current passes through, the charge carrier in the conductor is deflected to one side by Lorentz force, and then generates voltage (Hall voltage). The electric field force caused by the voltage will balance the Lorentz force.
In science, the electric quantity passing through any cross section of conductor in unit time is called current intensity, which is called current for short. The current symbol is I, and the unit is ampere (A), It is called "An" for short (Andre Marie Ampere, a French physicist and chemist from 1775 to 1836, made outstanding achievements in the research of electromagnetic effects and also contributed to mathematics and physics. Ampere, the international unit of current, is named after him).

Lyrics of drinking tea at Lidong:
1. Cold Night Du Lei of Song Dynasty:
On a cold night, guests came to tea as wine, and bamboo stove soup was boiling.
As usual, the moon in front of the window is different when there are plum blossoms.
2. Dusk Snow Daxu of Qing Dynasty:
On the evening of the day, the north wind is tight, and the cold forest is silent.
Who is talking about Buddhism? What a falling ceiling.
It's hard to write a calligraphy. Knock on the bed and make tea.
The Zen Pass can be closed early, so few passengers should stop.
3. He Weng Lingshu's Stories in Winter, Xu Zhao of Song Dynasty:
Knock the ice water between the stones, and make tea by yourself.
Mei misses the leap moon and misses the spring flowers far away.
Poor people like the new growth in the field, and the chanting has made their hair beautiful.
Looking for a cottage in the city, I want to move home at the end of the year.
4. Late Rise Bai Juyi of Tang Dynasty
After sleeping, I often get up late. The stove fires early, but the cold mirror wraps the head late.
Melting snow and frying tea, mixing crisp and boiling chyle. Slouchy greediness is still the same, and happiness is unknown.
The wine is warm and non-toxic, and the sound of the piano is not sad. In addition to the three pleasures of Ronggong, he still makes a little man.
5. In Spring, Du Xunhe of Tang Dynasty wrote about snow in the mountains:
The bamboo tree is silent or noisy, and it is still gathering.
Ling Mei puts on heavy makeup after she thanks, but the water on the rocks turns to ice.
Guard the deer against hunters, and wait for the chanting monk in the full tea tripod.
So that you can apply the cream to rain with the same skill, and the pine path and berry moss will be covered again.

"Zeus" is the king of the gods in ancient Greek mythology. Zeus is the third generation god king in ancient Greek mythology, the supreme god who rules all things in the world, and the first of the twelve main gods of Olympus. It is the greatest god in Greek mythology. In Roman mythology, Jupiter or Jove was the only god corresponding to Zeus.
Zeus is called "the king of gods" or "the king of Olympus", and also the god of sky and thunder. When he is in a good mood, the sky is sunny and clear. When he is angry, the sky will be covered with dark clouds, lightning and thunder.
Because the ancient Greeks and Romans worshipped Zeus, they said Zeus was their own ancestor in mythology. Many gods and many Greek heroes of Olympus were his children born to different women. He uses thunder and lightning as weapons to maintain the order between heaven and earth. Bulls and eagles are his symbols. His two brothers Poseidon and Hades were in charge of the sea and the underworld respectively. Zeus guarded the constellation Sagittarius.

The origin of Xin Qiji's name: Xin Qiji's grandfather, Xin Zan, hoped that he would become a great general and admired Huo Qubing, a famous general of the Western Han Dynasty, so he named him "Qi Ji". Xin Qiji has practiced martial arts and swords since he was young, and has read poetry and books. He has always regarded Huo Qubing as his idol.

Profile:

Xin Qiji (from May 28, 1140 to October 3, 1207), originally named Tanfu, later renamed You'an, and later renamed Jiaxuan when he was middle-aged, was a native of Licheng County (now Licheng District, Jinan City, Shandong Province), Jinan, Shandong East Road. Southern Song officials, generals, litterateurs, bold and unconstrained poets, known as "the dragon in ci". Together with Su Shi, they are called "Su Xin", and together with Li Qingzhao, they are called "Jinan Er'an".

Shandong was occupied by Jin people when he was born. In his early years, Shandong was as famous in the north as Dang Huaiying, known as "Xin Dang". When he was young, he participated in the Geng Jing Uprising, captured and killed the traitor Zhang Anguo, returned to the Southern Song Dynasty, and presented Ten Treaties on Beauty and Celery, Nine Treaties, etc. He successively served as a garrison in Jiangxi, Hunan, Fujian and other places, calmed down the uprising of Lai Wenzheng, a tea merchant in Jingnan, and pushed aside the public opinion to create the Flying Tiger Army to stabilize the Huxiang region. Because of his disagreement with the ruling peace faction, he was repeatedly impeached and went up and down several times, finally retiring from the mountain. Before and after the Kaixi Northern Expedition, Han Tuozhou, a governor, successively used Xin Qiji to inform Shaoxing and Zhenjiang, and recruited him to serve as the Privy Council, Chengzhi and other officials. All of them were dismissed. In 1207, the third year of the New Year, Xin Qiji died at the age of 68. Emperor Gong of the Song Dynasty was awarded a young teacher with the posthumous title of "Zhongmin".

Xin Qiji devoted his whole life to recovery and made great achievements, but his fate was full of difficulties and his ambition was hard to pay. But he never wavered in his belief in restoring the Central Plains. Instead, he expressed his passion and concern for the rise and fall of the country and the fate of the nation in his poems. His poems have various artistic styles, mainly bold and unconstrained. Their style is solemn and heroic, but there is no lack of delicacy and softness. Their themes are broad and they are good at using allusions to express the patriotic enthusiasm to restore national unity, pour out the grief and indignation that it is difficult to pay for their lofty aspirations, humiliate and condemn the ruling people at that time, and there are also many works that recite the rivers and mountains of the motherland. There are more than 600 extant words, including Jiaxuan Long and Short Sentences, which have been handed down from generation to generation.

Main impacts:

1、 Literature:

1. Words:

Xin has more than 600 Ci poems, and is the writer with the most Ci poems in the Song Dynasty. His poems mostly focus on the realistic problems of the country and the nation, expressing his impassioned patriotism. Xin Ci, with its patriotic thought in content and innovative spirit in art, has had a great influence in the history of literature. Chen Liang and Liu Guo, who sang with Xin Qiji in ci, or later Liu Kezhuang and Liu Chenweng, were similar to his writing tendency, forming a powerful patriotic ci school after the middle of the Southern Song Dynasty. In later generations, when the country and the nation are in danger, many writers draw inspiration from Xin's poems.

2. Poetry:

Xin Qiji's poems, according to Xin Qitai's Collection of Jiaxuan, there are 111 poems collected. Deng Guangming edited and collated "Xin Jiaxuan's Copy of Poems and Essays", eliminating the mistakes and adding omissions, and got 124 poems. Later, Kong Fanli's "Xin Jiaxuan Poetry Supplement" added 19 new poems. There are 133 existing poems of Xin. Xin's poems reflect the author's life, thoughts and feelings from different aspects, which can be proved by his words. Among them, "Farewell to Hunan Tribune", a self written political experience, can be read in contrast with "Partridge Sky, Banners and Ten Thousand Men at the Age of Zhuang"; "Sometimes when I think about something difficult to think about, I don't know when I shoot at the broken fence" ("Heming Pavilion quatrains"), lamenting the hero's frustration, I also co shot with "Water Dragon Singing - Climbing the Jiankang Heart Appreciation Pavilion", and "Bamboo sticks and sandals watching the waterfall return, I feel tired in my old age, Cui Wei", "Together with Du Shugao and Zhu Yan to watch the Tianbao Temple waterfall owner stay for two days and drink about the peony drink"), and co shot with "Partridge Sky, Goose Lake Return to Sickness". It is the theme of lyrics chanted repeatedly during leisure time. "There is still a happy atmosphere and strength, but he can still join the army like Bao in poetry" ("The rhyme of seeing and sending with the teacher"), Xin Qiji promised himself with Bao Zhao. His poetic style was elegant, and besides the "Jiangxi" and "Jianghu" at that time, he had his own way of marching. Moreover, some of his anti Japanese poetry, solemn and stirring, may not be under his anti Japanese poetry, but after all, Xin Qiji wrote poetry in addition to his poetry, and his achievements in poetry can not be compared with that of poetry.

3. Article:

In addition to his achievements in poetry, Xin Qiji's writing style is magnificent and full of pride, which is quite commendable. Xin Qiji's essays, according to Deng Guangming's compilation, are 17, most of which are sulfur readings, except for a few enlightenment notes and sacrificial essays. Such memorials, to a certain extent, revealed the sharp national and class contradictions that existed at that time, and more profoundly reflected the social reality; He also systematically stated Xin Qiji's views and strategies on fighting against the Jin Dynasty and recovering his career, which fully reflected his "heroic spirit" and "strong spirit". Xin Qiji has clearly declared that "the people who talk about the world are the masters of qi" (the second part of the Nine Opinions). The so-called "style of writing is bold, the wisdom is simple, and the power to write is strong" (The Complete Works of Hou Cun, Vol. 98), which reflects the characteristics of Xin Wen. Later generations regarded him as a great writer of political essays in the Southern Song Dynasty, which was only covered by the name of Ci and was not well known.

2、 Calligraphy:

Xin Qiji has a "Calligraphy of Going to the State", which is now stored in the Palace Museum. Paper book, ten lines of semi cursive script, is for correspondence. At the end of the document, "Xuanjiao Lang Xin removed the secret pavilion and revised the right of writing. Jiangnan West Road raised the issue of criminal justice, Xin Qiji, Zhazi". The center uses a pen, stippling rules, and writes smoothly and freely, without losing the appearance of straightness and squareness in the roundness and beauty.

"The Calligraphy of Going to the Country" was once collected by Zhao Mengfu in the Yuan Dynasty, Huang Lin, Xiang Yuanpei in the Ming Dynasty and Yong Europe in the Qing Dynasty, and was described as "Calligraphy and Painting Appreciation".

3、 Military:

1. Military activities:

Xin Qiji is not only an expert in Ci, but also a rare talent of the general. As a general, he can take the lead and capture Zhang Anguo among thousands of troops; He is handsome and can command with determination. He has the merit of pacifying the tea merchant army in January.

Xin Qiji once proposed large-scale cross sea landing operations, which are coordinated with land attacks. His idea is full of military creativity. He said that it has the same effect as Han Xin's idea of bypassing the Central Plains and reaching the same place during the Chu Han War.

2. Military thinking:

Xin Qiji's military theory is mainly embodied in Ten Comments on American Celery. "Ten Treatises on the United States and Celery", also known as "Ten Treatises on the Imperial Army", is a military political paper by Xin Qiji. From the first theory to the tenth theory, the book is all brilliant and has high research value. At the same time, it is also a good military treatise, which states the grand plan of fighting against the Japanese and saving the nation, recovering lost territory and unifying China. After Xin Qiji presented Ten Treatises on Beautiful Celery to Emperor Xiaozong of Song Dynasty, later generations took "Beautiful Celery" as a synonym for worrying about the country, the people and the subversion of the country. The Ten Treatises on Beauty and Celery is divided into ten chapters, which are respectively Shen Shi, Cha Qing, Guan Ri, Autonomous, Shou Huai, Zhi Yong, Fang Wei, Jiu Ren, and Xiang Zhan. They have constructed in detail the national governance strategy from spirit to material and then to military management, and stated the way of employing people and troops. At last, he showed Xiaozong the strategic idea of the Southern Song Dynasty attacking the Jin State step by step, and systematically demonstrated Xin Qiji's strategic policy and foresight, which was enough to reflect his military strategic level and strategy.