格式:pdf
大?。?span class="single-tag-height">158KB
頁數(shù): 4頁
樹木主要調(diào)查因子是指樹木的直接測量因子及其派生因子?;跇淠菊{(diào)查因子的內(nèi)在聯(lián)系,利用234株油松實測材料,分析了直徑與樹高、樹干枝下高及材積的相關(guān)關(guān)系。結(jié)果表明,它們之間的相關(guān)性非常緊密,其相關(guān)指數(shù)(R)均在0 98以上。
格式:pdf
大?。?span class="single-tag-height">112KB
頁數(shù): 1頁
Management for Coming up to Standards of the Power Units of Gaobazhou Hydroplant Hu Zuoxin (Qingjiang Gaobazhou Hydropower Plant , Yidu , Hubei , 443300 , China) Abstract : Several basic measures about selection , erection , debugging and commissioning operation of the power units of Gaobazhou hydroplant are described. Key words : Gaobazhou Hydropower Plant , coming up to standards , putting into