Recent content by dreamsfly

Thank you! I'm pleasantly surprised for your applying so quickly! yes,I can retake the exam,but it's a thing one year later,and I didn't want to take money from home to support myself.So I need to find a job,and therefore will leave less time for me to study,and the probability of success...

Hard for me to say "Bye" to you-Tears for Physics I'm a undergraduate student in China,in a un-famous University,studying technology,which is because I didn't get enough marks in the exam of the entrance to university,and rejected by physics school.As you know or not,MARKS is everything in...

Hello? Is there anyone could help me?

As known,we can use 3 basic dimensions to represent other dimensions,but how to represent I with L,M,T?

Ok, I think I have understood it,Thanks again Physics Monkey!

Then is it the X-representation?

Thank you Physics Monkey!it helps a lot!but I still have several questions: 1,I underatand what you mean by "labeled by x or p",but in some books it says themain idea of a representation is the choosing of basic functions which is in order to expand other state functions,here comes the...

What's the relationship between an certain represetation and the independent variable under this represetation? for details: 1 Must the independent variable of X-represetation be X,and P-represetation must be p?if so ,What's the represetation which basic fuctions are P-latent fuctions...

That's just what I care about.

I have ever thought about this method,but can it be separated two mixed sounds by resonance?

I have ever thought about this method,but can it be separated two mixed sound by resonance?

Assume they are not recorded separately,there's only a sound-background,just kick out a certain sound,which can be used in mobilephone:Although you speak in publical place with loud noise,but the listener can only hear your voive,that's the aim.

Thank you!

Oh,I think I　missed -s,sorry! I'm interested in frequency filters ,would you please speak more about that?

ok,I'll make it clear here:for example,we can combine two sound waves into one compositive wave,then if we know the compositive wave,how to separate it into original wave? I believe it can be true,just as our ears can do.