2006年全国研究生数学建模赛试题B题确定高精度参数问题通过对此生态系统的观测,可以得到相关的观测数据。观测数据的格式依次为:观测时刻 、A生物数目 、B生物数目 二:请利用有关数据,解决以下问题:1) 在观测数据无误差的情况下,若已知 ,求其它5个参数 ?有关数据见数据文件:DATA1.TXT2) 在观测数据无误差的情况下,若 也未知,问至少需要多少组观测数据,才能确定参数 ?有关数据见数据文件:DATA1.TXT3) 在观测资料有误差(时间变量不含有误差)的情况下,请分别利用观测数据DATA2.TXT和DATA3.TXT,确定参数 在某种意义下的最优解,并与仿真结果比较,进而改进你们的数学模型。4) 假设连观测资料的时间变量也含有误差,试利用数据DATA4.TXT,建立数学模型,确定参数 在某种意义下的最优解。 | |
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Jxh 助理工程师方仓医院
精华 0 积分 39 帖子 20 水位 39 技术分 0
| DATA1: 0 10. 60. 0.1 11.750840650304518 0.137********82216 0.2 3.4133367257849176 7.108705996120129 0.30000000000000004 20.80921881438798 0.4251595082899424 0.4 5.231982481945481 0.7182384931413827 0.5 26.925221604818102 26.706603701525214 DATA2: 0 12.962285633035274 72.12301583344777 0.1 7.556010311240527 71.67657541335356 0.2 5.012389496575022 48.23918464064572 0.30000000000000004 4.115101160280639 27.706526063384022 0.4 4.157********3944 15.771296803359892 0.5 4.371214882341812 8.54754774326805 0.6000000000000001 5.097347946012937 5.053363204567495 0.7000000000000001 6.017742223373778 3.427330069667394 .0411******** 0.9 8.603101382298291 2.0797726313164624 1. 10.243977668713889 1.9701111774432476 1.1 12.155********2205 1.9531050635242233 1.2000000000000002 14.667014315962746 3.1610667560240433 1.3 17.46397599812083 5.34791385343634 1.4000000000000001 19.357223394944807 11.763711102363706 1.5 19.3156720070885 31.678007805227185 1.6 14.487632014190856 66.16246673044174 1.7000000000000002 8.378050815567198 75.20988962107522 1.8 5.286781699620561 53.67038797843451 1.9000000000000001 4.209401208819748 31.421171963269877 2. 4.252073268847241 17.769543691456494 2.1 4.336218949010566 9.958423838824306 2.2 5.01407876566076 5.387150679654596 2.3000000000000003 5.761322806227691 4.040726552041118 2.4000000000000004 6.904591285302763 2.3020803048494534 .029********* 2.6 9.808500775491309 1.75947973299337 2.7 11.824255106266216 2.3015002146966723 2.8000000000000003 14.125625********* 2.267098746277406 2.9000000000000004 16.928718095096954 4.371205955319 3. 19.234742244833953 9.867363321194953 3.1 19.58639225876244 25.610857626558055 3.2 16.168067021040613 58.77678874767516 3.3000000000000003 9.66855026899961 76.87199644083012 3.4000000000000004 5.78236129521373 59.57986324315572 3.5 4.438941572542834 35.649564918083826 3.6 4.120640880446572 20.195261445928278 3.7 4.351141607554163 11.329216809467702 3.8000000000000003 4.922725179743356 6.350252859062622 漯河日报社3.9000000000000004 5.721912740492032 3.9644126858886053 4. 6.422264401423927 2.5823998547091884 4.1000000000000005 7.823773088120576 2.0994467495005487 4.2 9.5097714495178 1.9155028532670368 4.3 11.309568078854788 1.9959537864866261 4.4 13.501604217754213 2.191017062711555 4.5 15.960123870287324 3.8063498837689713 4.6000000000000005 18.70494484847073 8.24182432269187 4.7 19.76582048146061 20.524894********* 4.800000000000001 17.160640000074363 50.52620657755037 4.9 10.816844928464159 76.72178535679896 5. 6.484858582616242 64.8842374177826 5.1000000000000005 4.365455644022846 41.06157774107425 .027********* 5.300000000000001 4.251735243160616 13.14280543286788 5.4 4.707556823744789 7.424024773099461 5.5 5.541728794448667 4.621348********* 5.6000000000000005 6.442185554956649 2.8882941580987747 5.7 7.464414758706364 1.9530814604540556 5.800000000000001 9.121081535461231 1.6606988550077266 5.9 11.018852575055812 1.5177886549608903 6. 13.080596077668527 1.9335756441977918 6.1000000000000005 15.58148230994088 3.422883395730071 6.2 18.209885846950606 6.556767491655707 6.300000000000001 19.7900612093532 16.571244814928733 6.4 18.37052862429037 42.159********8345 6.5 12.305194621801098 74.134********38 6.6000000000000005 7.1167307281114764 69.81400608654573 .853********* 6.800000000000001 4.043827250977153 26.32200510023839 6.9 4.247969239071056 14.47741857889306 7. 4.58912147411644 8.357406628747716 7.1000000000000005 5.025644394725934 5.152********50725 7.2 6.06964524619881 2.7676052268902955 7.300000000000001 7.2961648212726375 2.557513183263443 7.4 8.662885286326063 1.8269756891156688官谣 7.5 10.258313521981226 1.742439983877785 7.6000000000000005 12.489849771812166 1.9980487973993049 7.7 14.967092571068736 2.7246591913725533 7.800000000000001 17.53332958297117 5.8421175469102495 7.9 19.616207186734766 13.233057344713275 8. 19.211306146310125 34.64167260814235 8.1 13.65472999143543 69.09082191274848 8.200000000000001 8.044129725356475 73.8423746687447 8.3 5.12741798382609 51.728182171176485 8.4 4.233329067117866 30.06901765237873 8.5 4.3729531646764475 16.712058508461904 8.6 4.4166812644699665 9.47540327094813 8.700000000000001 5.088145882448873 5.836315736688868 8.8 5.89644378527204 3.5049806273997377 8.9 6.869685307643319 2.6725456494781277 9. 8.42095238453697 2.2814058344801595 9.1 10.129175103225677 2.1002224852628366 9.200000000000001 11.983853870135562 2.106254943582631 9.3 14.361708860747354 2.65724178872079 9.4 16.976762555030923 5.043357080197475 9.5 19.139********1577 10.89168470690081 9.600000000000001 19.574774202808545 28.10501189052734 9.700000000000001 15.234523560854228 62.164653287025104 .0775******** 9.9 5.634610558908647 56.85645775841149 10. 4.507965319058354 33.78475908163881 10.100000000000001 4.099287735942571 18.685316152093083 10.200000000000001 4.338698090764137 10.743276881222734 10.3 4.866285571980089 6.416596808543655 10.4 5.6264177151197465 4.07510753904816 10.5 6.689604121178981 2.5602329526718317 10.600000000000001 7.9702953611906056 2.112476********* 10.700000000000001 9.59301437319481 1.5995225507997182 10.8 11.317979448817825 1.9382647646367748 10.9 13.709351742164005 2.8217471690982205 11. 16.37977758765754 4.077161602469897 11.100000000000001 18.74294559792725 8.749335128556984 11.200000000000001 19.828501269755066 22.855173408131776 11.3 16.741546943877854 53.928713437160035 11.4 10.281464554754278 76.80080703524658 11.5 6.054818398422438 62.65956433900848 11.600000000000001 4.460109692883834 38.97294560288111 11.700000000000001 4.16944277209851 21.89522190782511 11.8 4.136********4909 12.349924366826757 11.9 4.752556283927288 6.7925691597894735 12. 5.42709723383035 4.424428305698483 12.100000000000001 6.487687907909313 3.0422065894845574 12.200000000000001 7.683804986033973 2.1485861860910815 .0859******** 12.4 11.11654662282097 1.4691084630032587 12.5 13.30659951395088 2.4979916442212273 12.600000000000001 15.720570394420344 3.926602372757318 12.700000000000001 18.331755163639055 7.3303430056383565 12.8 19.78238872627243 18.084571926750233 12.9 17.947288956594498 45.47752513446509 13. 11.715284801948428 75.75849737597902 13.100000000000001 6.8592110525043255 68.14433850218718 13.200000000000001 4.6969839892991665 43.901408691921866 .0775******** 13.4 4.130********0161 14.059067054936378 13.5 4.510322307526262 7.807426410408963 13.600000000000001 5.297031628618251 4.621604704485565 13.700000000000001 6.223076858648067 2.7165990002576423 13.8 7.479887363387733 2.0729709605752027 13.9 8.822720207354518 1.7446533461241185 14. 10.695564283991134 1.5837550779451686 14.100000000000001 12.683185558423473 2.2162409960962632 14.200000000000001 15.246448545968768 3.1469180984892837 14.3 17.905061607976997 5.918683253640126 三乙胺14.4 19.782655339761774 14.751535066684449 14.5 18.74927378895725 37.66375729271265 14.600000000000001 13.129668084028397 71.35113396077065 14.700000000000001 7.569641058252821 72.68926500483879 14.8 5.184********971 49.26904731735949 14.9 4.222588637897196 28.442448065038533 15. 4.281998883486133 15.989563361697222 | |
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2006年全国研究生数学建模赛试题B题确定高精度参数问题
题目:确定高精度参数问题包括“神舟六号”载人航天宇宙飞船、人造地球卫星等航天器围绕地球在轨运行的过程中,要受到很多力的作用,其中主要的是地球万有引力和航天器发动机作用力。一:考虑航天器在仅受到地球万有引力、航天器自身发动机作用力的作用下作平面运动,将地球和航天器视为质点,试建立航天器运动的数学模型(只要列出模型,不要求解)。显然这样的数学模型在精度上是远远不能满足实际需要的,在其他要求精确制导等有关高科技的实际问题中,我们都面临着类似的问题:我们必须建立高精度的数学模型,必须高精度地估计模型中的大批参数,因为只有这样的数学模型才能解决实际问题,而不会出现差之毫厘,结果却失之千里的情况。这时所建立数学模型的精度就成了数学模型的生命线。例如上述问题中的航天器还要受到地球质量分布不均匀所引起的摄动力,大气阻力,日、月及其它星球的摄动引力的影响,以及航天器发动机为调整航天器自身姿态运作时作用力的影响。这样不但数学模型十分复杂,而且在这些数学模型中还要涉及到许多重要的参数,如地球的引力场模型就有许多待定参数。不仅如此,在对航天器进行测量时,还涉及到观测站的地理位置以及设备的系统误差等参数。为此人们要设法利用长期积累的丰富 的观测资料,高精度确定这些重要的参数。
由于航天器的问题太复杂,下面本题仅考虑较简单的确定高精度参数问题。
假设有一个生态系统,其中含有两种生物,即: A生物和B生物,其中A生物是捕食者,B生物是被捕食者。假设 时刻捕食者A的数目为 ,被捕食者B数目为 ,它们之间满足以下变化规律:
初始条件为:
其中 为模型的待定参数。