Fourier's idiom goes like this: Qi Xin helps the wisdom, adjusts the pearls and helps the powder, and helps the initial repair together. 2. Structure: V (left and right structure) vertical (single) leaves (left and right structure). 3: Pinyin is, fü lü yè. 4: The phonetic notation is, ㄈㄨㄌㄖㄝ _.
What is the specific explanation of Fourier? We will introduce you through the following aspects:
I. Text Description Click here to view the details of the plan.
(1) Jean batiste Joseph Fourier (jeanbaptistejosephfourier, 1768- 1830). Translation of "Fourriere" French mathematician and physicist. Studying at the local military academy. Professor of Paris Institute of Technology, Member of French Academy of Sciences. The analytical theory of heat was published in 1822, and the heat conduction equation was successfully derived. On the basis of variable separation method, the function is expressed as a series composed of trigonometric functions (now called Fourier series), thus creating a branch of "Fourier analysis" and developing the concept of function, which has a great influence on the development of pure mathematics and applied mathematics. ② Charles Fourier (1772- 1837). French utopian socialist. Expose the evils of capitalism and advocate the establishment of a socialist society, but the fantasy is realized through publicity and education. Emphasize women's liberation, and put forward that the degree of women's liberation is the standard of people's complete liberation. He is the author of "Four Major Movements and the Fate of the Universe" and "New Industrial World and Cooperative World".
Words about Fourier
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Words about Fourier
Add Fu Langfu powder and Lang Diao Zhu Fu powder, Zhong Xiufu powder is like the first show of Qiyifu.
On Fourier's Sentence-making
1. This paper introduces the method of analyzing transient evoked otoacoustic emissions by short-time Fourier transform, gives the experimental results of its time-frequency distribution, and analyzes the different moments and durations of its frequency components.
2. By using the method of coordinate transformation and function expansion into Fourier series, the strict mathematical analytical solution of axial velocity field in Newtonian fluid eccentric annulus is derived.
3. Substituting the series solution into the boundary conditions, the linear algebraic equations with undetermined coefficients can be established by Fourier series method.
4. Fourier analysis is often used in traditional vibration analysis. For some non-stationary vibration signals of diesel engine, Fourier analysis may give wrong results and lead to wrong diagnosis.
5. The shape features of tomatoes, leaves and branches are studied, and the shape features derived from Fourier coefficients, such as roundness, slender length, concavity and density, are extracted by Fourier descriptors.
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