In third chapter, it gave out the linear programming method of lad and two examples . to the first example it gave out its linear programming result by lindo6.01 . of course the result proves its accuracy and rapidity by comparing with lindo6.01 and testing with random data 第三章介紹了最小一乘估計的線性規(guī)劃實現(xiàn)方法,并對兩個常見的數(shù)據(jù)例子做了計算說明,第一個例子給出了使用線性規(guī)劃軟件lindo6.01計算的結(jié)果,通過比較和數(shù)據(jù)試驗有效地說明了本算的準(zhǔn)確性和快速性。
On the base of grain self-sufficiency, following natural laws, such as, the area where is suitable for tree to grow, we plant tree, where suitable for grass to grow we plant grass, or plant both tree and grass . applying linear programming method, synthetically considering ecological benefit, economic benefit and social benefit, regarding minimizing the contradictory between water supply and requirement of agriculture, enhancing the capability of anti-drought, and decreasing the influence of drought as our aims, to provide theoretical bases and scientific methods for adjusting agricultural structure, returning cropland to woodland and grassland, and utilizing water resources sustainablly, and improving ecological environment in semi-arid region 因地制宜,在保證糧食自給的基礎(chǔ)上,遵循“宜林則林,宜草則草,林草結(jié)合”的原則,運(yùn)用線性規(guī)劃方法,綜合考慮生態(tài)、經(jīng)濟(jì)和社會效益,以農(nóng)業(yè)水分供需矛盾最小,增加抗御干旱的能力,減少干旱的影響為目的,調(diào)整半干旱區(qū)農(nóng)業(yè)結(jié)構(gòu),為水資源的可持續(xù)利用和退耕還林還草,改善生態(tài)環(huán)境提供理論依據(jù)和方法。