integral function

• 1. 积分函数: integral function | pfn integrand
• 2. 指数积分函数: expint | exponential integral function
• 3. 正弦积分函数: sine integral function | sine integrals

更多释义

• 1.而积分函数就是dxdy前的这个函数，它与积分边界无关。
  While the function that you are integrating goes before the dx dy and not into the bounds or anything like that.
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• 2.本文定义了象差积分函数，导出了形式简洁的全部二级象差函数。
  By defining integration function, all second-order aberration coefficients have been expressed in compact form.
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• 3.该定积分可用MATLAB提供的积分函数计算，或者利用蒙特卡罗方法通过编程求解。
  The definite integral can be calculated with the integration function in MATLAB or can be solved by using the Monte Carlo programming method.
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