# 需要导入模块: from scipy import constants [as 别名]# 或者: from scipy.constants importspeed_of_light[as 别名]defacceleration_voltage_to_relativistic_mass(acceleration_voltage):"""Get relativistic mass of electron as function of acceleration voltage. Parameters --- acceleration_voltage : float In...
atomic_unit_of_temperature = E_h / k = a_u_temp planck_temperature = (hbar * c ** 5 / gravitational_constant / k ** 2) ** 0.5 速度 [velocity] = [length] / [time] = [speed] knot = nautical_mile / hour = kt = knot_international = international_knot mile_per_hour = mile ...
print('the speed of %(obj)s '%{‘obj’:‘light’}+‘is %10.2f meters per second’ %(299792458)) 输出: a is 123 b is 456 the speed of light is 299792458.00 meters per second 1. 2. 3. 4. 5.
#光速,每秒30万公里speed_of_light = 300000#地球质量,5.97×10²⁴kgmass_of_earth = 5970000000000000000000000#地球最深峡谷的海拔,10994m,因在地下,我们这里用负数表示altitude_of_mariana_trench = -10994print(speed_of_light)print(mass_of_earth)print(altitude_of_mariana_trench) 我们可以通过下划线_将...
speed_of_light#真空中的光速,单位为m/s 299792458.0 >>> ct.mu_0#磁常数(真空磁导率),单位为H/m 1.25663706212e-06 >>> ct.epsilon_0#真空介电常数,单位为F/m 8.8541878128e-12 >>> ct.h#普朗克常数,单位为J·s 6.62607015e-34 >>> ct.Planck#普朗克常数,单位为J·s 6.62607015e-34 >>> ct....
(r"$\mathre TD-OCT(Matlab) % Use SI units throughoutlambda0=830E-9;% center wavelengthdlambda=60E-9;% bandwidth (delta lambda)c=3E8;% speed of lightlc=4*log(2)/pi*lambda0^2/dlambda% coherence lengthNumber_of_periods=0.5*
# coding=utf-8import numpy as npimport matplotlib.pyplot as pltimport scipy as spfrom mpl_toolkits.mplot3d import Axes3D# parameters settingB = 135e6 # Sweep BandwidthT = 36.5e-6 # Sweep TimeN = 512 # Sample LengthL = 128 # Chirp Totalc = 3e8 # Speed of Lightf0 = 76.5e9 # St...
When Python can’t thread: a deep-dive into the GIL’s impact, PythonSpeed When does a Python thread need to hold the GIL? The parallelism implications of the GIL The good scenario: Long-running C APIs that release the GIL Bad scenario #1: “pure” Python code ...
When Usain Bolt ran 100 meters in 9.58 seconds at the 2009 world championships, he had an average speed of 10.4 meters per second. This translates to about 37.6 kilometers per hour and 23.4 miles per hour.Validating JSON You’ll now look at one last use case. Take a quick look at the...
from random import random from time import perf_counter # Change the value of COUNT according to the speed of your computer. # The value should enable the benchmark to complete in approximately 2 seconds. COUNT = 500000 DATA = [(random() - 0.5) * 3 for _ in range(COUNT)] e = 2.718...