楊向群 的英文怎麼說
中文拼音 [yángxiàngqún]
楊向群
英文
yang xiangqun-
In different phases of development, vegetation systems in this region have changed from pioneer herbage species initially recovering in abandoned cropping lands ( bothriochloa ischemum, artenmisia giradii and stipa bungeana, artenmisia sacrorum, spodiopogen sibiricus and sophora flavecens, themeda japonica, and arundinella anomala ) to secondary shrubs ( hippophae rhamnoides, sophora viciifdia, and ostryopsis davidiana ), early forest community ( populus davidiana, betula platyphylla and platycladus orientalis with arbors or shrub assembling ), and finally liaotungesis community as the mature forest. in this study, soil profiles ( 0 - 5, 5 - 15, 15 - 25, 25 - 35, 35 - 50 cm soil layers ) were selected from typical vegetation systems representing for vegetation successions in the region
該區北部目前還保存有空間上完整的植被正向演替系列，即棄耕地先鋒群落草本群落（白羊草bothriochloaischemum 、茭蒿artenmisiagiradii +長茅草stipabungeana 、鐵桿蒿artenmisiasacrorum 、大油芒spodiopogensibiricus +苦參sophoraflavecens 、黃菅草themedajaponica或野古草arundinellaanomala ）灌叢群落（沙棘hippophaerhamnoides 、狼牙刺sophoraviciifdia 、虎榛子ostryopsisdavidiana ）早期森林群落（喬灌群聚、山楊populusdavidiana 、白樺betulaplatyphylla 、側柏platycladusorientalis 、 ）遼東櫟群落（ quercusliaotungensis ） 。The characteristic numbers and their probability meaning of the birth and death process have been settled by both professor yang in [ 1 ] and professor wang in [ 2 ]
楊向群教授在文獻[ 1 ] ，王梓坤教授在文獻[ 2 ]中，對以0為反射壁的生滅過程的特徵數及其概率意義已解決。The characteristic numbers and their probability meaning of the birth and death process with zero as its quasi - leap - reflecting barrier have been partially settled by professor yang in [ 1 ], which depends on setting up a method that solving system of liner equations with two boundaries. in this thesis, the author has setted up another method that solving system of liner equations with one boundary on the basis of the former method, and has improved further the characteristic numbers and their probability meaning of the birth and death process with zero as its quasi - leap - reflecting barrier
在文獻[ 1 ]中，楊向群教授創立了解含兩個邊界的線性方程組的方法，並利用該方法對對以0為擬飛射壁的生滅過程的特徵數及其概率意義有了部分解決。本文是在此方法的基礎上創立了解含一個邊界的線性方程組的方法，並利用這兩種方法對以0為反射壁和擬飛射壁的生滅過程的特徵數及其概率意義做了進一步的完善。
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