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。
and by applying linear programming, the paper analyzes and optimizes data communications market and points out the direction of optimizing the structure of hunan data communications products in the future . on the basis of the above analysis, six marketing strategies are established such as developing the services with different extent according to the three layers, establishing the cooperative alliance of multi-winning instead of win-or-lose one, optimizing the products structure, developing wide-band services in priority and so on 在上述分析和研究的基礎(chǔ)上,提出和制訂了湖南電信數(shù)據(jù)通信業(yè)務(wù)的市場營銷策略,包括根據(jù)業(yè)務(wù)模型有重點(diǎn)、分層次抓好業(yè)務(wù)發(fā)展,廣泛建立聯(lián)盟變“單贏”為“多贏”、抓好產(chǎn)品的結(jié)構(gòu)優(yōu)化調(diào)整、優(yōu)先發(fā)展新興寬帶業(yè)務(wù)等,轉(zhuǎn)換企業(yè)經(jīng)營機(jī)制,積極探索新增長點(diǎn)等。