Some large excess microwave noise generators use Avalanche diodes to create commercial noise that can be switched on and off .
Some commercial microwave noise generators use Avalanche diodes to create a large excess noise that can be switched on and off .

Are these two sentences paraphrases of each other?
no

He also served as chairman of the North Shore branch of the Long Island division of the American Jewish Congress .
He has also served as chairman of the North Shore branch of the Long Island Division of the American Jewish Congress .

Are these two sentences paraphrases of each other?
yes

Ayeza Khan ( born Aiza Khan on 15 January ,1991 ) , also known as Kinza Khan , is a Pakistani television actress and model .
Ayeza Khan ( born January 15 , 1991 in Kinza Khan ) , known as Aiza Khan , is a Pakistani television actress and a model .

Are these two sentences paraphrases of each other?
no

His three sisters included Helen C. Bulkeley , who married Roland Redmond , Mary Caroline Bulkeley .
His three sisters included Mary Caroline Bulkeley , who married Roland Redmond , Helen C. Bulkeley ( b .

Are these two sentences paraphrases of each other?
no