Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Journal of Beijing Forestry University》 2008-S1
Add to Favorite Get Latest Update

Estimation of wood density with the model of indirect adjustment.

NIE Min-li~(1,2) FENG Zhong-ke~(1,2) YANG Li-min~3 SUI Hong-da~(1,2) 1 Key Laboratory for Silviculture and Conservation of Ministry of Education,Beijing Forestry University,100083,P.R.China;2 Institute of GIS,RS & GPS,Beijing Forestry University,100083,P.R.China;3 China Non-ferrous Metal Resources Geological Survey Center,Beijing,100012,P.R.China.  
To avoid heavy workload and difficulty in weighing wood trunks with large diameter directly in the field, wood density is often adopted to obtain the weight.The key point of this method is to evaluate the average density.Based on the principle of least square and indirect adjustment model,two parameters,the density of both trunks without bark and the bark,and only the density of trunks without bark,were used to estimate the most probable value of the average density and to evaluate the model precision.Results show that indirect adjustment with the parameter of trunk density without bark had a difference of 0.13 g/cm between the estimated density and the actual density.It is a simple and practical method with high precision.
【Fund】: 国家自然科学基金项目(90302014)
【CateGory Index】: S781
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
【Citations】
Chinese Journal Full-text Database 3 Hits
1 FENG Zhong-ke~1;WANG Zhong-feng~(1,2);LUO Xu~1.1 Institute of GIS,RS & GPS,Beijing Forestry University,100083,P.R.China; 2 School of Prospecting and Surveying,Changchun Institute of Technology,130021,P.R.China.;Biological characteristic coefficients of ten tree species in Xiaolong Mountain,west China.[J];Journal of Beijing Forestry University;2005-S2
2 FENG Zhong-ke;LIU Yong-xia.Institute of GIS,RS &GPS,Beijing Forestry University,100083,P.R.China.;Precision analysis of forest biomass measuring.[J];Journal of Beijing Forestry University;2005-S2
3 WANG Zhong-feng~(1,2);FENG Zhong-ke~1.1 Institute of GIS,RS & GPS,Beijing Forestry University,100083,P.R.China;2 School of Prospecting and Surveying,Changchun Institute of Technology,130021,P.R.China.;Precision of forest biomass measurement in forest sample plot.[J];Journal of Beijing Forestry University;2005-S2
【Co-citations】
Chinese Journal Full-text Database 10 Hits
1 Wei Liping Lin Jingxue Ma Yueqin (Institute 53);THE DETECTION OF THE ABLATIVE COMPOSITE BY THERMAL ANALYSIS[J];Engineering Plastics Application;1991-01
2 Wei Liping Lin Jingxuc Ma Yueqin (Institute 53.Jir.an);THE DETERMINATION FOR THE ABLATIVE PERFORMANCE OF COMPOSITES QUANliTATIVELY BY THERMAL ANALYSIS[J];Engineering Plastics Application;1994-06
3 LI Wei,ZHU Hong(School of Science,Beijing Jiaotong University,Beijing 100044,China);Application of Uniform Experiment Design in Prescription of Oil Displacement Agent[J];Journal of Beijing Jiaotong University;2008-03
4 Zhao Huibing Wang Xishi (College of Electronics and Information Engineering,Northern Jiaotong University, Beijing 100044);Study on the Regression Model of Ballast Impedance of Track Circuit with Concrete Sleepers[J];JOURNAL OF NORTHERN JIAOTONG UNIVERSITY;1998-05
5 Zhang Xiaoyan Department of Fundamental Courses, Beijing Institute of Clothing Technology, Beijing 100029;Models of Consumption Function for Beijing Urban Residents[J];Journal of Beijing Institute of Clothing;2001-01
6 ZHOU Zunning,PAN Gongpei,LI Yi,GUAN Hua(Nanjing University of Science & Technology,Nanjing, 210094);Formula Design of Infrared Smoke Composition Based on Uniform Design Method[J];Chinese Journal of Explosives & Propellants;2003-02
7 Feng zhongke; Han xichun ; Zou keliang ; Nan yongtian ; Fuxiao. Journal of Beijing Forestry University(2001)[Ch, 11 ref.] College of Resources and Environment,Beijing For. Univ., 100083, P. R . China.;The analysis of Forestry mensuration principle and precision in fixed samples by total station[J];Beijing Surveying and Mapping;2003-01
8 LIU Sheng-chuan,WANG Lian-jun;Level Surveying and Data Process in the Subsidence Monitoring of Roadbed of Jiaoxin Railway[J];Beijing Surveying and Mapping;2004-02
9 Lu Li-jun (Tianjing HuaDun project management and consultation co.,Ltd, Tianjing 300070, China);The Use of Excel in the Deformation Data Analysis of Building[J];Beijing Surveying and Mapping;2005-04
10 CHEN Ben-fu, GUO Xian-chun (Department of Geoscience and Rasource lnformation, East China lnstitute of Technology, Fuzhou 344000, China);The Choice of Models for Surveying Data Processing at Different Stages in the Nuclear Power Plant's Construction[J];Beijing Surveying and Mapping;2006-02
【Secondary Citations】
Chinese Journal Full-text Database 2 Hits
1 XUE Li,YANG Peng (College of Forestry, South China Agricultural University,Guangzhou 510642,China);Summary of Research on Forest Biomass[J];Journal of Fujian College of Forestry;2004-03
2 Feng Zong-wei Chen Chu-ying Zhang Jia-wu Wang Kai-ping Zhao Ji-lu Gao-hong(Institute of Forestry and Pedology,Academia Sinica);DETERMINATION OF BIOMASS OF PINUS MASSONIANA STAND IN HUITONG COUNTY,HUNAN PROVINCE[J];Scientia Silvae Sinicae;1982-02
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved