表达式34: "E" Subscript, 1 , Baseline left parenthesis, "x" , "y" , right parenthesis equals StartFraction, "k" "Q" Subscript, 1 , Baseline Over distance left parenthesis, left parenthesis, "x" , "y" , right parenthesis , "P" Subscript, 1 , Baseline , right parenthesis squared , EndFraction times StartFraction, left parenthesis, left parenthesis, "x" , "y" , right parenthesis minus "P" Subscript, 1 , Baseline , right parenthesis Over distance left parenthesis, left parenthesis, "x" , "y" , right parenthesis , "P" Subscript, 1 , Baseline , right parenthesis , EndFractionE1x,y=kQ1distancex,y,P12·x,y−P1distancex,y,P1
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表达式35: "E" Subscript, 2 , Baseline left parenthesis, "x" , "y" , right parenthesis equals StartFraction, "k" "Q" Subscript, 2 , Baseline Over distance left parenthesis, left parenthesis, "x" , "y" , right parenthesis , "P" Subscript, 2 , Baseline , right parenthesis squared , EndFraction times StartFraction, left parenthesis, left parenthesis, "x" , "y" , right parenthesis minus "P" Subscript, 2 , Baseline , right parenthesis Over distance left parenthesis, left parenthesis, "x" , "y" , right parenthesis , "P" Subscript, 2 , Baseline , right parenthesis , EndFractionE2x,y=kQ2distancex,y,P22·x,y−P2distancex,y,P2
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表达式36: "E" Subscript, "v" "e" "c" , Baseline left parenthesis, "x" , "y" , right parenthesis equals "E" Subscript, 1 , Baseline left parenthesis, "x" , "y" , right parenthesis plus "E" Subscript, 2 , Baseline left parenthesis, "x" , "y" , right parenthesisEvecx,y=E1x,y+E2x,y
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表达式37: "G" Subscript, "v" "e" "c" "A" "t" , Baseline left parenthesis, "Z" , "E" Subscript, "v" "e" "c" , Baseline left parenthesis, "Z" . "x" , "Z" . "y" , right parenthesis times 2 Superscript, "f" , Baseline , 0.1 , right parenthesisGvecAtZ,EvecZ.x,Z.y·2f,0.1
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表达式38: "f" equals negative 3f=−3
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表达式39: "G" Subscript, "v" "e" "c" "A" "t" , Baseline left parenthesis, "Z" , "E" Subscript, 1 , Baseline left parenthesis, "Z" . "x" , "Z" . "y" , right parenthesis times 2 Superscript, "f" , Baseline , 0.1 , right parenthesisGvecAtZ,E1Z.x,Z.y·2f,0.1
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表达式40: "G" Subscript, "v" "e" "c" "A" "t" , Baseline left parenthesis, "Z" , "E" Subscript, 2 , Baseline left parenthesis, "Z" . "x" , "Z" . "y" , right parenthesis times 2 Superscript, "f" , Baseline , 0.1 , right parenthesisGvecAtZ,E2Z.x,Z.y·2f,0.1
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表达式41: "E" left parenthesis, "x" , "y" , right parenthesis equals left parenthesis, negative StartFraction, "d" Over "d" "x" , EndFraction "V" left parenthesis, "x" , "y" , right parenthesis , negative StartFraction, "d" Over "d" "y" , EndFraction "V" left parenthesis, "x" , "y" , right parenthesis , right parenthesisEx,y=−ddxVx,y,−ddyVx,y
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表达式42: "G" Subscript, "v" "e" "c" "A" "t" , Baseline left parenthesis, "Z" , "E" left parenthesis, "Z" . "x" , "Z" . "y" , right parenthesis times 2 Superscript, "f" , Baseline , 0.1 , right parenthesisGvecAtZ,EZ.x,Z.y·2f,0.1
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表达式43: "V" Subscript, "Z" , BaselineVZ
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表达式44: "V" Subscript, "Z" 1 , Baseline equals "V" Subscript, "a" "s" "I" "n" "t" 1 , Baseline left parenthesis, "Z" . "x" , "Z" . "y" , right parenthesisVZ1=VasInt1Z.x,Z.y
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表达式45: left parenthesis, "Z" . "x" , "Z" . "y" , right parenthesisZ.x,Z.y
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表达式46: "V" Subscript, "a" "s" "I" "n" "t" 2 , Baseline left parenthesis, "Z" . "x" , "Z" . "y" , right parenthesisVasInt2Z.x,Z.y
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表达式47: "V" Subscript, "a" "s" "I" "n" "t" 3 , Baseline left parenthesis, "Z" . "x" , "Z" . "y" , right parenthesisVasInt3Z.x,Z.y
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表达式48: "V" Subscript, "a" "s" "I" "n" "t" 4 , Baseline left parenthesis, "Z" . "x" , "Z" . "y" , right parenthesisVasInt4Z.x,Z.y
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表达式49: "V" Subscript, "a" "s" "I" "n" "t" 1 , Baseline left parenthesis, "X" , "Y" , right parenthesis equals negative left parenthesis, Start integral from infinity to 1, end integral, left parenthesis, "E" Subscript, "v" "e" "c" , Baseline left parenthesis, "s" "X" , "s" "Y" , right parenthesis . "x" "X" positive "E" Subscript, "v" "e" "c" , Baseline left parenthesis, "s" "X" , "s" "Y" , right parenthesis . "y" "Y" , right parenthesis "d" "s" , right parenthesisVasInt1X,Y=−∫1∞EvecsX,sY.xX+EvecsX,sY.yYds
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表达式50: "V" Subscript, "a" "s" "I" "n" "t" 2 , Baseline left parenthesis, "X" , "Y" , right parenthesis equals negative left parenthesis, Start integral from negative infinity to 0, end integral, "E" Subscript, "v" "e" "c" , Baseline left parenthesis, 0 , "y" , right parenthesis . "y" "d" "y" positive Start integral from 0 to 1, end integral, left parenthesis, "E" Subscript, "v" "e" "c" , Baseline left parenthesis, "s" "X" , "s" "Y" , right parenthesis . "x" "X" positive "E" Subscript, "v" "e" "c" , Baseline left parenthesis, "s" "X" , "s" "Y" , right parenthesis . "y" "Y" , right parenthesis "d" "s" , right parenthesisVasInt2X,Y=−∫0−∞Evec0,y.ydy+∫10EvecsX,sY.xX+EvecsX,sY.yYds
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表达式51: "V" Subscript, "a" "s" "I" "n" "t" 3 , Baseline left parenthesis, "X" , "Y" , right parenthesis equals negative left parenthesis, Start integral from infinity to 0, end integral, "E" Subscript, "v" "e" "c" , Baseline left parenthesis, 0 , "y" , right parenthesis . "y" "d" "y" positive Start integral from 0 to 1, end integral, left parenthesis, "E" Subscript, "v" "e" "c" , Baseline left parenthesis, "s" "X" , "s" "Y" , right parenthesis . "x" "X" positive "E" Subscript, "v" "e" "c" , Baseline left parenthesis, "s" "X" , "s" "Y" , right parenthesis . "y" "Y" , right parenthesis "d" "s" , right parenthesisVasInt3X,Y=−∫0∞Evec0,y.ydy+∫10EvecsX,sY.xX+EvecsX,sY.yYds
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表达式52: "V" Subscript, "a" "s" "I" "n" "t" 4 , Baseline left parenthesis, "X" , "Y" , right parenthesis equals negative left parenthesis, Start integral from infinity to 1, end integral, left parenthesis, "E" Subscript, "v" "e" "c" , Baseline left parenthesis, "s" "X" , "s" "Y" , right parenthesis . "x" "X" positive "E" Subscript, "v" "e" "c" , Baseline left parenthesis, "s" "X" , "s" "Y" , right parenthesis . "y" "Y" , right parenthesis "d" "s" , right parenthesisVasInt4X,Y=−∫1∞EvecsX,sY.xX+EvecsX,sY.yYds
