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portfolioinvestment50--1771.2.4005003.4.--1781231.--1792.3.uncertainty12110010--180q3EBD'A'F'Gq2q1DOCC'AF121jointprofit121AA'BG0121CC'DD'CC'DD'DD'--181121CC'DD'EEECDEEEC'DEC'Eq1q1q1121AA'DEC'FF'FF'Gq2121q2q1--182NPVRCC*M*A*D*∑+−−=ttttErMCRNPV)1(*(12.1)∑+−−=ttttFDIrACRNPV)1(**(12.2)∑+−−=ttttLrDCRNPV)1(**(12.3)trM*A*D*1NPVEmaxNPVFDINPVL--1832NPVFDImaxNPVENPVL3NPVLmaxNPVENPVFDIM*A*A*A*D*D*t=0M*A*D*12.4M*A*D*tptgtctqthDfteAbtaM−=−=−=***(12.5)t=012.3aehaeh12.6M*A*D*cgpA*M*D*cgp(13.7)--184122EπFπLπ122S1S1S2S2LπFπOEπS2S112280--1851.2.3.4.--186*1983115--187()(198115--188)1920--1891.2.3.4.5.6.7.8*.--190