After harvesting , we separated plant parts to determine economic yield and biological yield , calculated energy of the different parts according to a conversion ratio of energy and studied energy structure and energy efficiency of alley cropping by statistical analysis 通過兩年田間小區(qū)試驗(yàn),詳細(xì)記錄所有勞力投入、化肥投入、農(nóng)藥投入、農(nóng)事管理活動以及落葉的數(shù)量并折算為標(biāo)準(zhǔn)能量單位。
Firstly , aiming the marketing of hydroelectricity , that is , under the situation of separated plant and network , and entering the market by the competition of price , the author analyzed the advantages of the development of hydroelectricity . secondly the author made a medium - long - period forecast and evaluation of the electric load of the accepting - electricity area by gray - and - nerve network matrix 首先針對水電市場化問題,即在廠網(wǎng)分家、竟價上網(wǎng)的形勢下,水電發(fā)展的優(yōu)勢何在進(jìn)行了探討;其次應(yīng)用灰色與神經(jīng)網(wǎng)絡(luò)模型對受電區(qū)電力負(fù)荷進(jìn)行了中長期預(yù)測與評價;通過梯級開發(fā)順序的基本理論與方法研究,得出黃河上游水電梯級開發(fā)順序的兩個備選方案。