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# Binbin Qi

### China University of Petroleum

3.971 total contributions since 2009

Professional Interests: Machine Learning/ Math/ Geophysics

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Solved

Find the absolute value of c=a-b
Find the absolute value of c=a-b

9 Tage ago

Solved

Find the next binary palindrome number
We all know, a *palindrome* is nothing but a number or character which remains the same after the forward or backward alteration...

9 Tage ago

Solved

Satellite Orbit Altitude
*Satellite and Space Engineering - Problem #4* _This is part of a series of problems looking at topics in satellite and space...

11 Tage ago

Solved

How many apple
You have x apples I take from you y apples now how many apples you have ?

11 Tage ago

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Find the y=(1:x)
Look at the question

11 Tage ago

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How tall are you?
measures your height forexample= 175cm 180cm 169cm

11 Tage ago

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Step number
Step number

11 Tage ago

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20xa
Try out this test problem first. Given the variable x as your input, multiply it by two and put the result in y Good luck ...

20 Tage ago

Solved

Find the area of ​​the square
There are *n²* circles inscribed in the square ABCD. The perimeter of each circle is *aπ* <<http://imgfz.com/i/3wzCeAT.png>> ...

20 Tage ago

Solved

Get the area of ​​the square.
Four circles are inscribed in the square ABCD. The perimeter of each circle is *aπ*. <<http://imgfz.com/i/UzgCJut.png>> Gi...

20 Tage ago

Solved

Distance Between Points
Being n the number of points (If n = 3 there would be 3 points: A, B and C). The distance between each pair of points increases...

20 Tage ago

Solved

Electric Flux
Calculate the flux passing through a surface. E is electric field, A is area.

20 Tage ago

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3xa
Try out this test problem first. Given the variable x as your input, multiply it by two and put the result in y.

20 Tage ago

Solved

4xa
Try out this test problem first. Given the variable x as your input, multiply it by two and put the result in y.

20 Tage ago

Solved

Hanging cable - 02
previous problem - <https://www.mathworks.com/matlabcentral/cody/problems/45373-hanging-cable-01> The height of the poles...

21 Tage ago

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Hanging cable - 01
The height of the poles is h the length of the cable is l u need to find the minimum distance between the poles whic...

21 Tage ago

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Minimal Path - 02
Given a matrix, find the minimal path from the top left to the bottom right by only moving to the right and down so that the sum...

22 Tage ago

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Quarantine Days
In these quarantine days, a list of what Max may do on a typical day is given in a table with the starting hour to ending hour. ...

22 Tage ago

Solved

Add all the numbers between two limits (inclusive)
In this problem you must add up "all of the numbers" between two specified limits, |a| and |b|, in which |a| ≤ |b|. However, th...

22 Tage ago

Solved

Obtain the Bitcoin address associated to a given private key
All the information you need is at <https://en.bitcoin.it/wiki/Address> and you may also find helpful <https://brainwal...

23 Tage ago

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Propagate the effects of a blockage in a chemical plant
From the perspective of flow, a chemical plant can be described by a collection of _nodes_ and _edges_. _Nodes_ are points where...

23 Tage ago

Solved

Pitting corrosion on a metal plate: Find the largest pit
You are given an N x M matrix of _ones_ and _zeros_, which represents an image of a rectangular metal plate taken from the hull ...

24 Tage ago

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Pitting corrosion on a metal plate: Count the number of pits
You are given an N x M matrix of _ones_ and _zeros_, which represents an image of a rectangular metal plate taken from the hull ...

24 Tage ago

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Momentum of an Object
P is momentum, m is mass, and v is velocity. Calculate the momentum for an object.

24 Tage ago

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Equilateral Triangle
The length of one side of the equilateral triangle is a. Calculate the area of ​​the equilateral triangle.

24 Tage ago

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Speed
x is distance, v is speed, and t is time. Calculate the speed for an object.

24 Tage ago

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Newton's Motion Law
F is force, m is mass, and a is acceleration. Calculate the force for an object.

24 Tage ago

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List the households affected by leaks in water distribution
Consider the following water distribution network, where water is pumped uni-directionally from left to right: 8...

24 Tage ago

Solved

Approximate the inverse tangent by power series
Given values b (where abs(b)<=1) and n (polynomial order), write a function that calculates atan(b) by using power series.

25 Tage ago

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Given a base n, find the y values less or equal than 100(without 1), such that they will never produce a periodic number if we divide any whole number between some of them
A periodic number depends on the base b where we are working. So, for example the number 2/3 in decimal base is periodic(0.666...

25 Tage ago