Bai Giang Thuc Hanh

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    13-Jul-2016

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Bai Giang Thuc Hanh

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  • MN HC TI U HA

  • Cu trc bi ton ti uHm mc tiuCc rng buc(iu kin bin)

  • Cc loi bi ton ti uMt mc tiuTuyn tnhPhi tuyna mc tiu

  • V dMt XN c 3 loi nguyn liu khc nhau: A, B, C vi lng d tr ti a l 10,16, 20 tn. Ngi ta dng sn xut 4 loi sn phm I, II, III, IV. nh mc k thut v tng loi nguyn liu sn xut ra 1 tn sn phm v tin li ca mi loi sn phm cho trong bng sau:Hy lp k hoch sn sut cc loi sn phm sao cho tha mn yu cu hn ch v nguyn liu, ng thi tng s tin li thu c ln nht.

    Loi nguyn liuD trnh mc k thutIIIIIIIVA (tn)101223B(tn)162112C (tn)203122Li (triu ng/tn)4564

  • Bi giiHm mc tiu: Rng buc:

    Kt qu x = (5, 0, 5/2, 0), gi tr max: 35

  • V d 2 nui 1 loi gia sc, mt i sn xut dng 3 loi thc n T1, T2, T3. Trong 3 loi thc n c cha 3 loi cht dinh dng A, B, C. S n v cht dinh dng (g) c trong 1 n v thc n (kg) nh bng bn:

    Nhu cu ti thiu trong khu phn hng ngy ca gia sc l: 10, 12, 14 n v cht A, B, C.Gi thc n mi loi l 3, 5, 7 (ngn ng/kg). Hy xc nh lng thc n mi loi cn c trong khu phn n hng ngy m bo yu cu v cht dinh dng, ng thi tng s tin mua thc n hng ngy l nh nht.

    Cht dinh dngS n v cht dinh dng trong 1 n v thc nT1T2T3A123B212C111

  • Bi giiKt qu x = (14,0,0) v gi tr min = 42

  • Ngi ta trng 3 ging la R1, R2, R3 trn 3 mnh rung I, II, III. Do tnh cht ca tng mnh rung v ca c im tng ging la nn nng sut ca cc ging la trn cc mnh rung l khc nhau v c cho bng:

    Bit rng:Din tch cc mnh rung I, II, III tng ng: 30ha, 60ha, 40ha.Din tch cc ging la R1, R2, R3 cn trng ln lt l 50ha, 40ha, 40ha.La R2 khng trng c mnh rung IIIHy lp m hnh bi ton tm k hoch trng la thu c tng sn lng ln nht

    RungGing la IIIIIIR1657R246R3564

  • Mt doanh nghip cn mua thit b mi a vo kinh doanh sn xut vi s tin u t mua thit b d tnh l 200 ngn $. C hai loi thit b c th mua vi cc thng tin nh sau:Thit b A: n gi 10 ngn $, thng s k thut cho bit trong 1h hot ng tiu hao nhin liu l 30 n v, nng sut trung bnh l 60 sn phm/h. Mi thit b chim din tch 4m2 Thit b B: n gi 15 ngn $, thng s k thut cho bit trong 1h hot ng tiu hao nhin liu l 45 n v, nng sut trung bnh 70 sn phm/h. Mi thit b chim din tch 6m2 Theo bn, doanh nghip s chn mua thit b nh th no c li nht (tiu hao nhin liu t nht), bit rng k hoch ca doanh nghip l phi t t nht 800 sn phm/h, v din tch phn xng l 100m2

  • ch to 1 loi hp cht, ngi ta cn s dng 3 loi n cht A, B, C. C 3 loi qung c kh nng cung cp cc loi n cht ny, k hiu l Q1, Q2, Q3. Bng sau y cho ta bit hm lng cc n cht c trong mt n v qung mi loi:

    ch to mt n v hp cht, ngi ta cn s dng t nht 2,5 n v cht A, 3 n v cht B v 4 n v cht C. Chi ph khai thc mi mt n v qung mi loi ln lt l 3, 6, 5 ngn $. Xc nh lng qung mi loi cn khai thc c th thc hin ch to c loi hp cht cn thit v chi ph khai thc l t nht.

    Loi qungn chtQ1Q2Q3A24B126C53

  • i1= 3,7A, i2 = 2,4A, i3 = 1,3A, i4 = 1,9A, i5 = -0,6A. Xc nh gi tr ca cc in tr tng nng lng trn cc in tr l nh nht.

  • Trong sx kinh doanh, cac nh qun l bao gi cng phi la chn phng n a ra quyt nh nhanh chng, chnh xc v kp thi vi nhng rng buc v hn ch v cc iu kin lin quan ti tim nng ca doanh nghip, iu kin th trng, hon cnh t nhin v x hi. Vic la chn phng n no ti u theo mc tiu nh trc l ht sc quan trng. Trong kinh t chng ta c cc rng buc tuyn tnh th s c m hnh quy hoch tuyn tnh bng thut ton n hnh. Trong phn mm Excel s dng mt cng c ci thm l Solver c th gii bi ton ti u tuyn tnh nhanh chng.