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Binbin Qi


Last seen: Today

China University of Petroleum

4,342 total contributions since 2009

Professional Interests: Machine Learning/ Math/ Geophysics

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Binbin Qi's Badges

  • Cody 5th Anniversary Finisher
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  • Knowledgeable Level 2
  • Thankful Level 1
  • First Answer
  • Logic
  • Computational Geometry I Master
  • Matrix Patterns II Master
  • Personal Best Downloads Level 1
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  • Introduction to MATLAB Master
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Contributions in
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Award medals to winners

14 hours ago

Solved


Evaluate the logarithmic integral
The <https://en.wikipedia.org/wiki/Logarithmic_integral_function logarithmic integral> li(x) plays a role in number theory becau...

14 hours ago

Solved


Sort a vector

1 day ago

Solved


Compute the perimeter of an ellipse
While the area of an ellipse is straightforward to compute, the perimeter (or circumference) is more complicated. The perimeter ...

2 days ago

Solved


Evaluate the incomplete elliptic integrals
Elliptic integrals can be used to evaluate integrals whose integrands have the form R(x,sqrt(P(x))), where R(x,y) is a rational ...

2 days ago

Solved


Identify primorial primes
Cody Problems <https://www.mathworks.com/matlabcentral/cody/problems/46054-count-trailing-zeros-in-a-primorial 46054> and <https...

3 days ago

Solved


Find the last non-zero digit in a primorial
<https://www.mathworks.com/matlabcentral/cody/groups/2001/problems/45251 Cody Problem 45251> asked us to find the last non-zero ...

3 days ago

Solved


Guess the logic

4 days ago

Solved


Count trailing zeros in a primorial
<https://www.mathworks.com/matlabcentral/cody/problems/44068-the-number-of-trailing-zero-digit-of-a-factorial Cody Problem 44068...

4 days ago

Solved


Construct a prime circle
A <https://mathworld.wolfram.com/PrimeCircle.html prime circle> is a circular arrangement of the numbers 1 to 2n such that pairs...

4 days ago

Solved


Optimum Egyptian Fractions
Following problem was inspired by <http://www.mathworks.com/matlabcentral/cody/problems/2126-split-bread-like-the-pharaohs-egypt...

5 days ago

Solved


Determine whether a number is a cluster prime
A <https://mathworld.wolfram.com/ClusterPrime.html cluster prime> is an odd prime number _p_ such that all even numbers less tha...

5 days ago

Solved


Identify Wagstaff primes
The numbers 3, 43, and 2731 are examples of <https://mathworld.wolfram.com/WagstaffPrime.html Wagstaff primes>. Write a func...

5 days ago

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List the emirps

5 days ago

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Investigate the frequency of last digits of prime numbers
The last digit of a prime number greater than 5 can be 1, 3, 7, or 9. If the primes are distributed randomly, then these digits ...

5 days ago

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Play Outside In with primes

5 days ago

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Find the position of planet in solarsystem
Write a funtion named *nthplanet* which takes name of the planet as input string and provides the position of the planet, starti...

5 days ago

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