harmonic mean

Set $ u $ to the harmonic function on $ \ bbR ^ n $, and $ \ bex \ sen {u }_{ L ^ p} = \ sex {\ int _ {\ bbR ^ n} | u (y) | ^ p \ rd y} ^ {1/p}  Proof: By $ \ beex \ bea \ sev {u (x )} & =\ sev {\ frac {1} {\ omega_n R ^ n} \ int _ {B _R (x)} u (y) \

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Psychological acoustics  This paper studies the relationship between subjective hearing and physical quantity of sound. It focuses on the relationship between sound stimulation and response. People's correct feeling and comprehension of sound are

Http://blog.sina.com.cn/s/blog_708637950100se7w.html Sensor Type:The sensor can be divided into different types according to the different working modes of each component of the sensor. The relative and absolute (Inertial) types can be divided

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import cv2importas npimportas pltimport scipyimport scipy.stats%matplotlib inlineRead in the image we need= cv2.imread("apple.jpg"= cv2.resize(cv2.cvtColor(apple,cv2.COLOR_BGR2RGB),(200,200))plt.imshow(apple)plt.axis("off")plt.show()Introduction to

The middle part of this article has already introduced the meaning of virtual reality, that is, indirect acquisition, and examples show that TV channels allow people to indirectly obtain TV station frequencies. Therefore, in this sense, it is

From the perspective of modern mathematics, Fourier transform is a special integral transformation. It can represent a function that satisfies a certain condition as a linear combination or integral of the sine basis function. In different fields of