Based on it , the monte carlo simulation is implemented for the octahedron parallel machine tool , and then the statistical frequency histogram is given 在此基礎(chǔ)上,對(duì)八面體并聯(lián)機(jī)床的位姿誤差進(jìn)行了montecarlo模擬,給出了統(tǒng)計(jì)頻數(shù)直方圖。
The result corrected by former result was to judge the land to be suitable for cultivation or not . in the end , productivity index threshold under different suitable - levels was determined by analyzing the frequency histograms distribution of 4 productivity index . the result shows that the productivity index criteria of reserved land in beijing is that altitude 800 m , slope 15 , soil depth 30 cm and gravel content 15 % 在生產(chǎn)性指標(biāo)方面,以北京市土地開發(fā)復(fù)墾潛力調(diào)查評(píng)價(jià)為基礎(chǔ),運(yùn)用相關(guān)分析、主成分分析確定指標(biāo)為海拔、坡度、土層厚度和礫石含量;對(duì)指標(biāo)進(jìn)行聚類,根據(jù)聚類結(jié)果對(duì)原有評(píng)價(jià)結(jié)果進(jìn)行修正并判定后備土地資源的宜耕性;通過(guò)分析多因素綜合作用下四項(xiàng)指標(biāo)的頻率分布情況,確定上述四個(gè)生產(chǎn)性指標(biāo)在不同宜耕等級(jí)下的閾值。