表达式10: "l" Subscript, 1 , Baseline left parenthesis, "x" , right parenthesis equals "r" times sine left parenthesis, theta Subscript, "L" , Baseline , right parenthesis left parenthesis, 1 plus 1 half "R" left parenthesis, "x" , right parenthesis , right parenthesis left brace, negative "x" Subscript, "M" , Baseline less than or equal to "x" less than or equal to "x" Subscript, "M" , Baseline , right bracel1x=r·sinθL1+12Rx−xM≤x≤xM
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表达式11: "l" Subscript, 2 , Baseline left parenthesis, "x" , right parenthesis equals "r" times sine left parenthesis, theta Subscript, "L" , Baseline , right parenthesis left parenthesis, 1 plus 1 half "R" left parenthesis, "x" , right parenthesis minus 1 eighth "R" left parenthesis, "x" , right parenthesis squared , right parenthesis left brace, negative "x" Subscript, "M" , Baseline less than or equal to "x" less than or equal to "x" Subscript, "M" , Baseline , right bracel2x=r·sinθL1+12Rx−18Rx2−xM≤x≤xM
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表达式12: "l" Subscript, 3 , Baseline left parenthesis, "x" , right parenthesis equals "r" times sine left parenthesis, theta Subscript, "L" , Baseline , right parenthesis left parenthesis, 1 plus 1 half "R" left parenthesis, "x" , right parenthesis minus 1 eighth "R" left parenthesis, "x" , right parenthesis squared plus StartFraction, 1 Over 16 , EndFraction "R" left parenthesis, "x" , right parenthesis cubed , right parenthesis left brace, negative "x" Subscript, "M" , Baseline less than or equal to "x" less than or equal to "x" Subscript, "M" , Baseline , right bracel3x=r·sinθL1+12Rx−18Rx2+116Rx3−xM≤x≤xM
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表达式13: StartFraction, "l" Subscript, 1 , Baseline left parenthesis, "x" , right parenthesis plus "l" Subscript, 2 , Baseline left parenthesis, "x" , right parenthesis Over 2 , EndFractionl1x+l2x2
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case theta_L = 0 ou pi
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表达式15: "l" Subscript, 0 , Baseline left parenthesis, "x" , right parenthesis equals "x" Subscript, "M" , Baseline minus "x" left brace, negative "x" Subscript, "M" , Baseline less than or equal to "x" less than or equal to "x" Subscript, "M" , Baseline , right bracel0x=xM−x−xM≤x≤xM
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表达式16: "l" Subscript, "p" , Baseline left parenthesis, "x" , right parenthesis equals "x" Subscript, "M" , Baseline plus "x" left brace, negative "x" Subscript, "M" , Baseline less than or equal to "x" less than or equal to "x" Subscript, "M" , Baseline , right bracelpx=xM+x−xM≤x≤xM
