sample n. 1.樣品,貨樣。 2.標(biāo)本;榜樣,實(shí)例。 3.【統(tǒng)計(jì)】典型取樣,抽檢查。 4.【電訊】信號(hào)瞬時(shí)值。 5.【冶金】 〔 pl. 〕 鋅華。 That is a fair sample of his manners. 那就是他的典型態(tài)度。 a light sample 光脈沖。 up to sample 1. 和樣品一樣[相符]。 2. 可以接受的,可以同意的。 vt. 從…取樣,從…抽樣;提供;貨樣;對(duì)…進(jìn)行抽樣檢查。
tree n. 特里〔姓氏〕。 n. 1.樹(shù)〔主要指喬木,也可指較大的灌木〕。 ★玫瑰可以稱為 bush, 也可以稱為 tree. 2.木料,木材;木構(gòu)件;〔古語(yǔ)〕絞首臺(tái);〔the tree〕(釘死耶穌的)十字架;鞋楦。 3.樹(shù)形(物),世系圖,家系 (=family tree);【數(shù)學(xué)】樹(shù)(形);【化學(xué)】樹(shù)狀晶體。 a banana tree 香蕉樹(shù)。 an axle-tree 心棒,軸料。 a boot-tree 靴楦[型]。 a saddle-tree 鞍架。 at the top of the tree 在最高地位。 tree of Buddha 菩提樹(shù)。 tree of heaven 臭椿。 tree of knowledge (of good and evil) 【圣經(jīng)】知道善惡的樹(shù),智慧之樹(shù)。 tree of life 生命之樹(shù),生命力的源泉【植物;植物學(xué)】金鐘柏。 up a tree 〔口語(yǔ)〕進(jìn)退兩難,不知所措。 vt. 趕(獵獸等)上樹(shù)躲避;〔口語(yǔ)〕使處于困境;窮追;把鞋型插入(鞋內(nèi))。
Method of sample tree collection for physical and mechanical tests of wood 木材物理力學(xué)試材采集方法
This article uses fixation swatch founding for second - class investigation to obtain character of 207 sample trees , by which mathematics model of ground diameter volume table of chinese fir were deduced by regressing and imitating with five of equations respectively , and used unitary and binary volume tables of timber respectively to reckon an unitary ground diameter volume table , then compared the two ground diameter volume tables , so that a ground diameter volume table of chinese fir in yanping district was compilated to satisfy essentially the precision demand of forestry production , and to serve forestry production 摘要利用二類調(diào)查布設(shè)的固定樣地,收集207株樣木調(diào)查資料,分別采用5個(gè)方程進(jìn)行回歸擬合,選出杉木人工林地徑材積表的方程模型,利用一元材積表和二元材積表導(dǎo)算編制一元地徑材積表,并進(jìn)行比較,結(jié)果表明二元材積表導(dǎo)算地徑材積表的方法精度較高,基本滿足林業(yè)生產(chǎn)所需精度要求,可以提供林業(yè)生產(chǎn)服務(wù)。