Article(id=1266801733377344313, tenantId=1146029695717560320, journalId=1266358746360856629, issueId=1266801713492153305, articleNumber=null, orderNo=null, doi=10.13324/j.cnki.jfcf.202504024, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1745164800000, receivedDateStr=2025-04-21, revisedDate=1753372800000, revisedDateStr=2025-07-25, acceptedDate=null, acceptedDateStr=null, onlineDate=1779958669274, onlineDateStr=2026-05-28, pubDate=1763136000000, pubDateStr=2025-11-15, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1779958669274, onlineIssueDateStr=2026-05-28, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1779958669274, creator=13701087609, updateTime=1779958669274, updator=13701087609, issue=Issue{id=1266801713492153305, tenantId=1146029695717560320, journalId=1266358746360856629, year='2025', volume='45', issue='6', pageStart='570', pageEnd='672', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=1, specialIssue=null, createTime=1779958664534, creator=13701087609, updateTime=1779959653473, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1266805862552199994, tenantId=1146029695717560320, journalId=1266358746360856629, issueId=1266801713492153305, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1266805862552199995, tenantId=1146029695717560320, journalId=1266358746360856629, issueId=1266801713492153305, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=629, endPage=640, ext={EN=ArticleExt(id=1266801733624808251, articleId=1266801733377344313, tenantId=1146029695717560320, journalId=1266358746360856629, language=EN, title=Spatial structure analysis of mixed forests based on close-range photogrammetry, columnId=1266801732626571427, journalTitle=Journal of Forest and Environment, columnName=Forest management, runingTitle=null, highlight=null, articleAbstract=
This study aimed to explore the feasibility of applying close-range photogrammetry in the quantitative analysis of spatial structure of mixed forests. A smartphone imagery-based method was developed to analyze the spatial structure of a coniferous-broadleaved mixed plantation in Jiufeng Experimental Forest Farm. A multi-path and multi-angle image acquisition strategy was employed to construct a three-dimensional (3D) point cloud model of the stand below the canopy. The optimal circle algorithm was utilized to identify and estimate the positions and diameter at breast height (DBH) of individual trees. The measured data of DBH, tree height, and crown width, along with DBH estimates derived from the 3D model, were used as weighting factors, and weighted Voronoi diagrams were constructed based on measured DBH, estimated DBH, and an equally weighted combination of measured DBH, tree height, and crown width. The effects of different weighting factors on key spatial structure parameters—mingling degree (M), neighborhood comparison (U), and uniform angle index (W)—were systematically analyzed. The results showed a strong correlation (R2=0. 977 2) between estimated DBH and measured DBH. For the estimated DBH of entire stand, the root mean square error (RMSE) of 1. 427 5 cm, the relative RMSE of 8. 224 1%, the deviation of 0. 503 8 cm, and the relative deviation of 2. 902 4%, which indicate the estimated DBH of the entire stand was underestimated. In addition, the results revealed similarities in the stand spatial structure units derived from different weighting factors. Although significant differences existed among some key spatial structure parameters, these did not affect the overall consistency in characterizing the stand's spatial structure. All the approaches consistently indicated that the stand exhibited moderate competition intensity, a moderate mixing degree, and a random distribution pattern.
, correspAuthors=Wenjie HU, authorNote=null, correspAuthorsNote=null, copyrightStatement=Copyright ©2025 Journal of Forest and Environment. All rights reserved., copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, authorCompany=null, fund=null, authors=null, authorsList=Yi WANG, Wenjie HU, Yongkang SUN, Chuanwu YUAN, Wenfeng WU), CN=ArticleExt(id=1266801736934114127, articleId=1266801733377344313, tenantId=1146029695717560320, journalId=1266358746360856629, language=CN, title=基于近景摄影测量技术的混交林空间结构分析, columnId=1266801732769177765, journalTitle=森林与环境学报, columnName=森林经营学, runingTitle=null, highlight=null, articleAbstract=
为探索近景摄影测量技术在混交林空间结构量化分析中的可行性, 以九峰实验林场的针阔混交人工林为研究对象, 提出一种基于智能手机影像的林分空间结构分析方法。通过采用多路径和多角度影像采集策略构建了样地林分冠层以下的三维点云模型, 采用最优圆算法识别并估测单木的位置和胸径。以样地调查获取的胸径、树高、冠幅实测数据和基于样地三维模型提取的胸径估测数据为权重因子, 分别构建基于实测胸径、估测胸径和实测胸径、树高、冠幅平权综合后的加权Voronoi图, 系统分析不同权重因子对混交度、大小比数和角尺度等关键空间结构参数的影响。结果显示, 估测胸径与实测胸径具有较高的相关性(R2=0. 977 2)。全林分估测胸径的均方根误差为1. 427 5 cm, 相对均方根误差为8. 224 1%, 偏差为0. 503 8 cm, 相对偏差为2. 902 4%, 全林分估测胸径表现为被低估的状态。结果还显示, 不同权重因子的林分空间结构单元具有相似性, 部分关键空间结构参数之间虽然存在显著差异, 但并不影响林分空间结构在表达上的一致性, 均能反映出研究区林分整体上处于中等竞争状态和中度混交程度, 以及随机分布格局。
, correspAuthors=胡文杰, authorNote=null, correspAuthorsNote=
, copyrightStatement=版权所有©《森林与环境学报》编辑部2025, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=L5fS1SOxgOVGGjPlAsVyQA==, magXml=vQ7x1SKnBS3b/15O6yLOXw==, pdfUrl=null, pdf=LC7Lb0T0IEORMqa8ahbStA==, pdfFileSize=3897862, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=btml9QK485/+e7wq2De33A==, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=Cek4k/Nqw0We4+tyGUi0aA==, mapNumber=null, authorCompany=null, fund=null, authors=
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王怡(1984-), 男, 助理研究员, 硕士, 从事森林培育学研究。Email: wangforestry@qq.com
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王怡(1984-), 男, 助理研究员, 硕士, 从事森林培育学研究。Email: wangforestry@qq.com
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et al. Benchmarking laser scanning and terrestrial photogrammetry to extract forest inventory parameters in a complex temperate forest[J]. International Journal of Applied Earth Observation and Geoinformation, 2022, 113: 102 999., articleTitle=null, refAbstract=null)], funds=null, companyList=[AuthorCompany(id=1266801737198355281, tenantId=1146029695717560320, journalId=1266358746360856629, articleId=1266801733377344313, xref=null, ext=[AuthorCompanyExt(id=1266801737206743890, tenantId=1146029695717560320, journalId=1266358746360856629, articleId=1266801733377344313, companyId=1266801737198355281, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=Hubei Academy of Forestry, Wuhan, Hubei 430075, China), AuthorCompanyExt(id=1266801737219326803, tenantId=1146029695717560320, journalId=1266358746360856629, articleId=1266801733377344313, companyId=1266801737198355281, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=湖北省林业科学研究院, 湖北 武汉 430075)])], figs=[ArticleFig(id=1266801742860665720, tenantId=1146029695717560320, journalId=1266358746360856629, articleId=1266801733377344313, language=EN, label=null, caption=
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拍摄路径, figureFileSmall=La50KS1tWjyZvh093u4WdA==, figureFileBig=btml9QK485/+e7wq2De33A==, tableContent=null), ArticleFig(id=1266801744785851258, tenantId=1146029695717560320, journalId=1266358746360856629, articleId=1266801733377344313, language=EN, label=Fig.1, caption=
Diagram of close-range photography, figureFileSmall=upmteDS5NG8epdrDu7KGYA==, figureFileBig=rBrAEL/kA20zgEX2UfOd9Q==, tableContent=null), ArticleFig(id=1266801744878125947, tenantId=1146029695717560320, journalId=1266358746360856629, articleId=1266801733377344313, language=CN, label=图2, caption=
近景摄影示意图, figureFileSmall=upmteDS5NG8epdrDu7KGYA==, figureFileBig=rBrAEL/kA20zgEX2UfOd9Q==, tableContent=null), ArticleFig(id=1266801744941040508, tenantId=1146029695717560320, journalId=1266358746360856629, articleId=1266801733377344313, language=EN, label=Fig.2, caption=
Dense point cloud model, figureFileSmall=0fR8L0LuHgfnrgmM0qapjA==, figureFileBig=9jcbW50Knh3Ecg611xpvOw==, tableContent=null), ArticleFig(id=1266801745020732285, tenantId=1146029695717560320, journalId=1266358746360856629, articleId=1266801733377344313, language=CN, label=图3, caption=
密集点云模型, figureFileSmall=0fR8L0LuHgfnrgmM0qapjA==, figureFileBig=9jcbW50Knh3Ecg611xpvOw==, tableContent=null), ArticleFig(id=1266801745087841150, tenantId=1146029695717560320, journalId=1266358746360856629, articleId=1266801733377344313, language=EN, label=Fig.3, caption=
Elevation normalization model, figureFileSmall=TQjYB0Ri6pElZSkqsXDUcw==, figureFileBig=KsoQFbGBbLrtapQl0eY+hQ==, tableContent=null), ArticleFig(id=1266801745163338623, tenantId=1146029695717560320, journalId=1266358746360856629, articleId=1266801733377344313, language=CN, label=图4, caption=
高程归一化模型, figureFileSmall=TQjYB0Ri6pElZSkqsXDUcw==, figureFileBig=KsoQFbGBbLrtapQl0eY+hQ==, tableContent=null), ArticleFig(id=1266801745259807616, tenantId=1146029695717560320, journalId=1266358746360856629, articleId=1266801733377344313, language=EN, label=Fig.4, caption=
Circular point cloud cross-section extraction, figureFileSmall=AeLfA8WaUWyOyck2SHCB7w==, figureFileBig=WHI0tRBnkUB/4jVTSwjPwQ==, tableContent=null), ArticleFig(id=1266801745377248129, tenantId=1146029695717560320, journalId=1266358746360856629, articleId=1266801733377344313, language=CN, label=图5, caption=
类圆点云横截面提取, figureFileSmall=AeLfA8WaUWyOyck2SHCB7w==, figureFileBig=WHI0tRBnkUB/4jVTSwjPwQ==, tableContent=null), ArticleFig(id=1266801745477911426, tenantId=1146029695717560320, journalId=1266358746360856629, articleId=1266801733377344313, language=EN, label=Fig.5, caption=
Circle fitting effect, figureFileSmall=OmgWCTjdmWhGb6kp0skW9Q==, figureFileBig=h2HHByAwgtRAsuukqH9GCg==, tableContent=null), ArticleFig(id=1266801745536631683, tenantId=1146029695717560320, journalId=1266358746360856629, articleId=1266801733377344313, language=CN, label=图6, caption=
圆拟合效果, figureFileSmall=OmgWCTjdmWhGb6kp0skW9Q==, figureFileBig=h2HHByAwgtRAsuukqH9GCg==, tableContent=null), ArticleFig(id=1266801745595351940, tenantId=1146029695717560320, journalId=1266358746360856629, articleId=1266801733377344313, language=EN, label=Fig.6, caption=
Linear regression analysis of DBH, figureFileSmall=4KjfUiQhWViIFowuJmJyEg==, figureFileBig=i/D0tQ71HLK4XfIanBVppg==, tableContent=null), ArticleFig(id=1266801745654072197, tenantId=1146029695717560320, journalId=1266358746360856629, articleId=1266801733377344313, language=CN, label=图7, caption=
胸径线性回归分析, figureFileSmall=4KjfUiQhWViIFowuJmJyEg==, figureFileBig=i/D0tQ71HLK4XfIanBVppg==, tableContent=null), ArticleFig(id=1266801745721181062, tenantId=1146029695717560320, journalId=1266358746360856629, articleId=1266801733377344313, language=EN, label=null, caption=
Weighted Voronoi diagrams based on different weighting factors, figureFileSmall=G9HdRs6eBYHiZE949xU63A==, figureFileBig=vbPpu0z9KEHVj5bxA1p5gw==, tableContent=null), ArticleFig(id=1266801745784095623, tenantId=1146029695717560320, journalId=1266358746360856629, articleId=1266801733377344313, language=CN, label=图8, caption=
基于不同权重因子的加权Voronoi图, figureFileSmall=G9HdRs6eBYHiZE949xU63A==, figureFileBig=vbPpu0z9KEHVj5bxA1p5gw==, tableContent=null), ArticleFig(id=1266801745867981704, tenantId=1146029695717560320, journalId=1266358746360856629, articleId=1266801733377344313, language=EN, label=Fig.8, caption=
Distribution frequency of neighborhood trees, figureFileSmall=jGeFiO2lcQphyUNXhT9n1g==, figureFileBig=LFCRLxjQR3OL4wfKHGxIUQ==, tableContent=null), ArticleFig(id=1266801745939284873, tenantId=1146029695717560320, journalId=1266358746360856629, articleId=1266801733377344313, language=CN, label=图9, caption=
邻近木分布频率, figureFileSmall=jGeFiO2lcQphyUNXhT9n1g==, figureFileBig=LFCRLxjQR3OL4wfKHGxIUQ==, tableContent=null), ArticleFig(id=1266801746023170954, tenantId=1146029695717560320, journalId=1266358746360856629, articleId=1266801733377344313, language=EN, label=Tab.1, caption=
Measurement data per tree of sample plot
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树种 Species | 株数 Number | 胸径DBH/cm | 树高Tree height/m | 冠幅Crown width/m |
最大值 Max. | 最小值 Min. | 标准差 SD | 平均值 Mean | 最大值 Max. | 最小值 Min. | 标准差 SD | 平均值 Mean | 最大值 Max. | 最小值 Min. | 标准差 SD | 平均值 Mean |
| 苦槠Castanopsis sclerophylla | 81 | 28.5 | 5.1 | 6.0 | 14.7 | 15.0 | 5.0 | 2.7 | 10.7 | 8.0 | 1.3 | 1.5 | 4.8 |
| 湿地松Pinus elliottii | 29 | 39.0 | 21.1 | 4.6 | 28.1 | 17.0 | 14.0 | 1.0 | 15.3 | 8.0 | 3.5 | 0.9 | 6.4 |
| 青冈Quercus glauca | 10 | 11.1 | 5.5 | 1.8 | 7.5 | 9.0 | 6.5 | 0.9 | 7.6 | 5.5 | 3.3 | 0.8 | 4.2 |
| 全林分Whole stand | 120 | 39.0 | 5.1 | 8.4 | 17.4 | 17.0 | 5.0 | 3.3 | 11.5 | 8.0 | 1.3 | 1.5 | 5.1 |
), ArticleFig(id=1266801746115445643, tenantId=1146029695717560320, journalId=1266358746360856629, articleId=1266801733377344313, language=CN, label=表1, caption=
样地每木检尺数据
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树种 Species | 株数 Number | 胸径DBH/cm | 树高Tree height/m | 冠幅Crown width/m |
最大值 Max. | 最小值 Min. | 标准差 SD | 平均值 Mean | 最大值 Max. | 最小值 Min. | 标准差 SD | 平均值 Mean | 最大值 Max. | 最小值 Min. | 标准差 SD | 平均值 Mean |
| 苦槠Castanopsis sclerophylla | 81 | 28.5 | 5.1 | 6.0 | 14.7 | 15.0 | 5.0 | 2.7 | 10.7 | 8.0 | 1.3 | 1.5 | 4.8 |
| 湿地松Pinus elliottii | 29 | 39.0 | 21.1 | 4.6 | 28.1 | 17.0 | 14.0 | 1.0 | 15.3 | 8.0 | 3.5 | 0.9 | 6.4 |
| 青冈Quercus glauca | 10 | 11.1 | 5.5 | 1.8 | 7.5 | 9.0 | 6.5 | 0.9 | 7.6 | 5.5 | 3.3 | 0.8 | 4.2 |
| 全林分Whole stand | 120 | 39.0 | 5.1 | 8.4 | 17.4 | 17.0 | 5.0 | 3.3 | 11.5 | 8.0 | 1.3 | 1.5 | 5.1 |
), ArticleFig(id=1266801746174165900, tenantId=1146029695717560320, journalId=1266358746360856629, articleId=1266801733377344313, language=EN, label=Tab.2, caption=
Estimated DBH accuracy of each diameter class
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径阶 Diameter class | 株数 Number of trees | 相关系数 R2 | 均方根误差 Root mean square error/cm | 相对均方根误差 Relative root mean square error/% | 偏差 Deviation/cm | 相对偏差 Relative deviation/% |
| Ⅰ | 52 | 0.796 3 | 1.314 2 | 10.772 5 | -0.020 8 | -0.170 5 |
| Ⅱ | 43 | 0.873 7 | 1.187 8 | 5.950 6 | 0.504 4 | 2.527 2 |
| Ⅲ | 25 | 0.905 7 | 1.939 6 | 6.572 3 | 1.593 8 | 5.400 6 |
| 全林分Whole stand | 120 | 0.977 2 | 1.427 5 | 8.224 1 | 0.503 8 | 2.902 4 |
), ArticleFig(id=1266801746245469069, tenantId=1146029695717560320, journalId=1266358746360856629, articleId=1266801733377344313, language=CN, label=表2, caption=
各径阶估测胸径精度
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径阶 Diameter class | 株数 Number of trees | 相关系数 R2 | 均方根误差 Root mean square error/cm | 相对均方根误差 Relative root mean square error/% | 偏差 Deviation/cm | 相对偏差 Relative deviation/% |
| Ⅰ | 52 | 0.796 3 | 1.314 2 | 10.772 5 | -0.020 8 | -0.170 5 |
| Ⅱ | 43 | 0.873 7 | 1.187 8 | 5.950 6 | 0.504 4 | 2.527 2 |
| Ⅲ | 25 | 0.905 7 | 1.939 6 | 6.572 3 | 1.593 8 | 5.400 6 |
| 全林分Whole stand | 120 | 0.977 2 | 1.427 5 | 8.224 1 | 0.503 8 | 2.902 4 |
), ArticleFig(id=1266801746316772238, tenantId=1146029695717560320, journalId=1266358746360856629, articleId=1266801733377344313, language=EN, label=Tab.3, caption=
ANOVA of the number of neighborhood trees in 3 weighted Voronoi diagrams
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差异源 Difference source | 平方和 Sum of squares | 自由度 Degree of freedom | 均方 Mean squared | F值 F value | P值 P value |
| 组间Inter-class | 0.456 | 2 | 0.228 | 0.030 | 0.971 |
| 组内Intra-class | 2 100.302 | 274 | 7.665 | | |
| 总计Total | 2 100.758 | 276 | | | |
), ArticleFig(id=1266801746383881103, tenantId=1146029695717560320, journalId=1266358746360856629, articleId=1266801733377344313, language=CN, label=表3, caption=
3种加权Voronoi图中邻近木株数方差分析
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差异源 Difference source | 平方和 Sum of squares | 自由度 Degree of freedom | 均方 Mean squared | F值 F value | P值 P value |
| 组间Inter-class | 0.456 | 2 | 0.228 | 0.030 | 0.971 |
| 组内Intra-class | 2 100.302 | 274 | 7.665 | | |
| 总计Total | 2 100.758 | 276 | | | |
), ArticleFig(id=1266801746467767184, tenantId=1146029695717560320, journalId=1266358746360856629, articleId=1266801733377344313, language=EN, label=Tab.4, caption=
Paired sample test of mingling degree
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权重因子两两配对 Weighting factor pairing | 配对差值Pairing difference | t值 t value | 自由度 Degree of freedom | P值 P value |
平均值 Mean | 标准偏差 Standard deviation | 标准误差 平均值 Standard error of the mean | 差值95%置信区间 Difference 95% confidence interval |
下限 Lower limit | 上限 Upper limit |
实测胸径-实测综合 MD-MS | 0.028 13 | 0.113 11 | 0.011 73 | 0.004 84 | 0.051 43 | 2.399 | 92 | 0.018 |
实测胸径-估测胸径 MD-ED | -0.019 22 | 0.111 67 | 0.011 71 | -0.042 48 | 0.004 04 | -1.642 | 90 | 0.104 |
实测综合-估测胸径 MS-ED | -0.047 97 | 0.159 64 | 0.016 73 | -0.081 22 | -0.014 72 | -2.867 | 90 | 0.005 |
), ArticleFig(id=1266801746543264657, tenantId=1146029695717560320, journalId=1266358746360856629, articleId=1266801733377344313, language=CN, label=表4, caption=
混交度配对样本检验
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权重因子两两配对 Weighting factor pairing | 配对差值Pairing difference | t值 t value | 自由度 Degree of freedom | P值 P value |
平均值 Mean | 标准偏差 Standard deviation | 标准误差 平均值 Standard error of the mean | 差值95%置信区间 Difference 95% confidence interval |
下限 Lower limit | 上限 Upper limit |
实测胸径-实测综合 MD-MS | 0.028 13 | 0.113 11 | 0.011 73 | 0.004 84 | 0.051 43 | 2.399 | 92 | 0.018 |
实测胸径-估测胸径 MD-ED | -0.019 22 | 0.111 67 | 0.011 71 | -0.042 48 | 0.004 04 | -1.642 | 90 | 0.104 |
实测综合-估测胸径 MS-ED | -0.047 97 | 0.159 64 | 0.016 73 | -0.081 22 | -0.014 72 | -2.867 | 90 | 0.005 |
), ArticleFig(id=1266801746643927955, tenantId=1146029695717560320, journalId=1266358746360856629, articleId=1266801733377344313, language=EN, label=Tab.5, caption=
Frequency distribution of and $ {\bar{M}}$ of different weighting factors
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权重因子 Weighting factor | 树种 Species | 混交度分布频率Distribution frequency of Mi | 平均混交度 $ \bar{M}$ |
| 0 | (0.00, 0.25] | (0.25, 0.50] | (0.50, 0.75] | (0.75, 1.00] |
估测胸径 ED | 苦槠C.sclerophylla | 0.05 | 0.08 | 0.61 | 0.20 | 0.06 | 0.45 |
| 湿地松P.elliottii | 0.00 | 0.00 | 0.09 | 0.50 | 0.41 | 0.72 |
| 青冈Q.glauca | 0.00 | 0.00 | 0.29 | 0.14 | 0.57 | 0.79 |
| 全林分Whole forest | 0.03 | 0.05 | 0.47 | 0.27 | 0.18 | 0.54 |
实测胸径 MD | 苦槠C.sclerophylla | 0.05 | 0.19 | 0.51 | 0.22 | 0.03 | 0.42 |
| 湿地松P.elliottii | 0.00 | 0.00 | 0.09 | 0.55 | 0.36 | 0.73 |
| 青冈Q.glauca | 0.00 | 0.00 | 0.29 | 0.14 | 0.57 | 0.79 |
| 全林分Whole forest | 0.03 | 0.13 | 0.40 | 0.29 | 0.15 | 0.52 |
实测综合 MS | 苦槠C.sclerophylla | 0.08 | 0.25 | 0.48 | 0.16 | 0.03 | 0.38 |
| 湿地松P.elliottii | 0.00 | 0.05 | 0.05 | 0.40 | 0.50 | 0.74 |
| 青冈Q.glauca | 0.00 | 0.00 | 0.29 | 0.14 | 0.57 | 0.79 |
| 全林分Whole stand | 0.05 | 0.18 | 0.37 | 0.22 | 0.18 | 0.49 |
), ArticleFig(id=1266801746723619732, tenantId=1146029695717560320, journalId=1266358746360856629, articleId=1266801733377344313, language=CN, label=表5, caption=
不同权重因子的林分混交度分布频率及均值
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权重因子 Weighting factor | 树种 Species | 混交度分布频率Distribution frequency of Mi | 平均混交度 $ \bar{M}$ |
| 0 | (0.00, 0.25] | (0.25, 0.50] | (0.50, 0.75] | (0.75, 1.00] |
估测胸径 ED | 苦槠C.sclerophylla | 0.05 | 0.08 | 0.61 | 0.20 | 0.06 | 0.45 |
| 湿地松P.elliottii | 0.00 | 0.00 | 0.09 | 0.50 | 0.41 | 0.72 |
| 青冈Q.glauca | 0.00 | 0.00 | 0.29 | 0.14 | 0.57 | 0.79 |
| 全林分Whole forest | 0.03 | 0.05 | 0.47 | 0.27 | 0.18 | 0.54 |
实测胸径 MD | 苦槠C.sclerophylla | 0.05 | 0.19 | 0.51 | 0.22 | 0.03 | 0.42 |
| 湿地松P.elliottii | 0.00 | 0.00 | 0.09 | 0.55 | 0.36 | 0.73 |
| 青冈Q.glauca | 0.00 | 0.00 | 0.29 | 0.14 | 0.57 | 0.79 |
| 全林分Whole forest | 0.03 | 0.13 | 0.40 | 0.29 | 0.15 | 0.52 |
实测综合 MS | 苦槠C.sclerophylla | 0.08 | 0.25 | 0.48 | 0.16 | 0.03 | 0.38 |
| 湿地松P.elliottii | 0.00 | 0.05 | 0.05 | 0.40 | 0.50 | 0.74 |
| 青冈Q.glauca | 0.00 | 0.00 | 0.29 | 0.14 | 0.57 | 0.79 |
| 全林分Whole stand | 0.05 | 0.18 | 0.37 | 0.22 | 0.18 | 0.49 |
), ArticleFig(id=1266801746803311509, tenantId=1146029695717560320, journalId=1266358746360856629, articleId=1266801733377344313, language=EN, label=Tab.6, caption=
Paired sample test of neighborhood comparison
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权重因子两两配对 Weighting factor pairing | 配对差值Pairing difference | t值 t value | 自由度 Degree of freedom | P值 P value |
平均值 Mean | 标准偏差 Standard deviation | 标准误差 平均值 Standard error of the mean | 差值95%置信区间 Difference 95% confidence interval |
下限 Lower limit | 上限 Upper limit |
实测胸径-实测综合 MD-MS | 0.012 09 | 0.092 60 | 0.009 60 | -0.006 98 | 0.031 16 | 1.259 | 92 | 0.211 |
实测胸径-估测胸径 MD-ED | -0.016 44 | 0.110 51 | 0.011 58 | -0.039 45 | 0.006 58 | -1.419 | 90 | 0.159 |
实测综合-估测胸径 MS-ED | -0.028 79 | 0.103 36 | 0.010 84 | -0.050 32 | -0.007 26 | -2.657 | 90 | 0.009 |
), ArticleFig(id=1266801746878808982, tenantId=1146029695717560320, journalId=1266358746360856629, articleId=1266801733377344313, language=CN, label=表6, caption=
大小比数配对样本检验
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权重因子两两配对 Weighting factor pairing | 配对差值Pairing difference | t值 t value | 自由度 Degree of freedom | P值 P value |
平均值 Mean | 标准偏差 Standard deviation | 标准误差 平均值 Standard error of the mean | 差值95%置信区间 Difference 95% confidence interval |
下限 Lower limit | 上限 Upper limit |
实测胸径-实测综合 MD-MS | 0.012 09 | 0.092 60 | 0.009 60 | -0.006 98 | 0.031 16 | 1.259 | 92 | 0.211 |
实测胸径-估测胸径 MD-ED | -0.016 44 | 0.110 51 | 0.011 58 | -0.039 45 | 0.006 58 | -1.419 | 90 | 0.159 |
实测综合-估测胸径 MS-ED | -0.028 79 | 0.103 36 | 0.010 84 | -0.050 32 | -0.007 26 | -2.657 | 90 | 0.009 |
), ArticleFig(id=1266801746950112151, tenantId=1146029695717560320, journalId=1266358746360856629, articleId=1266801733377344313, language=EN, label=Tab.7, caption=
Frequency distribution of Ui and ${\bar{U}} $ of different weight factors
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权重因子 Weighting factor | 树种 Species | 大小比数分布频率Distribution frequency of Ui | 平均大小比数 ${\bar{U}} $ |
| 0 | (0.00, 0.25] | (0.25, 0.50] | (0.50, 0.75] | (0.75, 1.00] |
估测胸径 ED | 苦槠C.sclerophylla | 0.02 | 0.03 | 0.16 | 0.28 | 0.51 | 0.75 |
| 湿地松P.elliottii | 0.32 | 0.40 | 0.23 | 0.05 | 0.00 | 0.18 |
| 青冈Q.glauca | 0.00 | 0.00 | 0.14 | 0.14 | 0.72 | 0.87 |
| 全林分Whole forest | 0.09 | 0.12 | 0.17 | 0.22 | 0.40 | 0.63 |
实测胸径 MD | 苦槠C.sclerophylla | 0.00 | 0.05 | 0.17 | 0.34 | 0.44 | 0.73 |
| 湿地松P.elliottii | 0.32 | 0.40 | 0.23 | 0.05 | 0.00 | 0.17 |
| 青冈Q.glauca | 0.00 | 0.00 | 0.14 | 0.00 | 0.86 | 0.90 |
| 全林分Whole forest | 0.08 | 0.13 | 0.18 | 0.25 | 0.36 | 0.61 |
实测综合 MS | 苦槠C.sclerophylla | 0.00 | 0.05 | 0.23 | 0.25 | 0.47 | 0.72 |
| 湿地松P.elliottii | 0.36 | 0.41 | 0.18 | 0.05 | 0.00 | 0.15 |
| 青冈Q.glauca | 0.00 | 0.00 | 0.14 | 0.00 | 0.86 | 0.88 |
| 全林分Whole stand | 0.09 | 0.13 | 0.22 | 0.18 | 0.38 | 0.60 |
), ArticleFig(id=1266801747017221016, tenantId=1146029695717560320, journalId=1266358746360856629, articleId=1266801733377344313, language=CN, label=表7, caption=
不同权重因子的林分大小比数分布频率及均值
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权重因子 Weighting factor | 树种 Species | 大小比数分布频率Distribution frequency of Ui | 平均大小比数 ${\bar{U}} $ |
| 0 | (0.00, 0.25] | (0.25, 0.50] | (0.50, 0.75] | (0.75, 1.00] |
估测胸径 ED | 苦槠C.sclerophylla | 0.02 | 0.03 | 0.16 | 0.28 | 0.51 | 0.75 |
| 湿地松P.elliottii | 0.32 | 0.40 | 0.23 | 0.05 | 0.00 | 0.18 |
| 青冈Q.glauca | 0.00 | 0.00 | 0.14 | 0.14 | 0.72 | 0.87 |
| 全林分Whole forest | 0.09 | 0.12 | 0.17 | 0.22 | 0.40 | 0.63 |
实测胸径 MD | 苦槠C.sclerophylla | 0.00 | 0.05 | 0.17 | 0.34 | 0.44 | 0.73 |
| 湿地松P.elliottii | 0.32 | 0.40 | 0.23 | 0.05 | 0.00 | 0.17 |
| 青冈Q.glauca | 0.00 | 0.00 | 0.14 | 0.00 | 0.86 | 0.90 |
| 全林分Whole forest | 0.08 | 0.13 | 0.18 | 0.25 | 0.36 | 0.61 |
实测综合 MS | 苦槠C.sclerophylla | 0.00 | 0.05 | 0.23 | 0.25 | 0.47 | 0.72 |
| 湿地松P.elliottii | 0.36 | 0.41 | 0.18 | 0.05 | 0.00 | 0.15 |
| 青冈Q.glauca | 0.00 | 0.00 | 0.14 | 0.00 | 0.86 | 0.88 |
| 全林分Whole stand | 0.09 | 0.13 | 0.22 | 0.18 | 0.38 | 0.60 |
), ArticleFig(id=1266801747080135577, tenantId=1146029695717560320, journalId=1266358746360856629, articleId=1266801733377344313, language=EN, label=Tab.8, caption=
Paired sample test of uniform angle index
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权重因子两两配对 Weighting factor pairing | 配对差值Pairing difference | t值 t value | 自由度 Degree of freedom | P值 P value |
平均值 Mean | 标准偏差 Standard deviation | 标准误差 平均值 Standard error of the mean | 差值95%置信区间 Difference 95% confidence interval |
下限 Lower limit | 上限 Upper limit |
实测胸径-实测综合 MD-MS | -0.005 50 | 0.106 68 | 0.011 06 | -0.027 47 | 0.016 47 | -0.497 | 92 | 0.621 |
实测胸径-估测胸径 MD-ED | 0.015 11 | 0.148 96 | 0.015 62 | -0.015 91 | 0.046 14 | 0.968 | 90 | 0.336 |
实测综合-估测胸径 MS-ED | 0.020 73 | 0.172 13 | 0.018 04 | -0.015 12 | 0.056 58 | 1.149 | 90 | 0.254 |
), ArticleFig(id=1266801747143050138, tenantId=1146029695717560320, journalId=1266358746360856629, articleId=1266801733377344313, language=CN, label=表8, caption=
角尺度配对样本检验
, figureFileSmall=null, figureFileBig=null, tableContent=
权重因子两两配对 Weighting factor pairing | 配对差值Pairing difference | t值 t value | 自由度 Degree of freedom | P值 P value |
平均值 Mean | 标准偏差 Standard deviation | 标准误差 平均值 Standard error of the mean | 差值95%置信区间 Difference 95% confidence interval |
下限 Lower limit | 上限 Upper limit |
实测胸径-实测综合 MD-MS | -0.005 50 | 0.106 68 | 0.011 06 | -0.027 47 | 0.016 47 | -0.497 | 92 | 0.621 |
实测胸径-估测胸径 MD-ED | 0.015 11 | 0.148 96 | 0.015 62 | -0.015 91 | 0.046 14 | 0.968 | 90 | 0.336 |
实测综合-估测胸径 MS-ED | 0.020 73 | 0.172 13 | 0.018 04 | -0.015 12 | 0.056 58 | 1.149 | 90 | 0.254 |
), ArticleFig(id=1266801747214353307, tenantId=1146029695717560320, journalId=1266358746360856629, articleId=1266801733377344313, language=EN, label=Tab.9, caption=
Frequency distribution of Wi and ${\bar{W}} $ of different weighting factors
, figureFileSmall=null, figureFileBig=null, tableContent=
权重因子 Weighting factor | 树种 Species | 角尺度分布频率Distribution frequency of Wt | 平均角尺度 ${\bar{W}} $ |
| 0 | (0.00, 0.25] | (0.25, 0.50] | (0.50, 0.75] | (0.75, 1.00] |
估测胸径 ED | 苦槠C.sclerophylla | 0.17 | 0.13 | 0.56 | 0.14 | 0.00 | 0.34 |
| 湿地松P.elliottii | 0.00 | 0.00 | 0.73 | 0.27 | 0.00 | 0.46 |
| 青冈Q.glauca | 0.43 | 0.14 | 0.29 | 0.14 | 0.00 | 0.24 |
| 全林分Whole forest | 0.15 | 0.10 | 0.58 | 0.17 | 0.00 | 0.36 |
实测胸径 MD | 苦槠C.sclerophylla | 0.13 | 0.19 | 0.53 | 0.13 | 0.02 | 0.36 |
| 湿地松P.elliottii | 0.00 | 0.05 | 0.63 | 0.32 | 0.00 | 0.48 |
| 青冈Q.glauca | 0.43 | 0.14 | 0.43 | 0.00 | 0.00 | 0.18 |
| 全林分Whole forest | 0.12 | 0.15 | 0.56 | 0.16 | 0.01 | 0.38 |
实测综合 MS | 苦槠C.sclerophylla | 0.13 | 0.23 | 0.46 | 0.16 | 0.02 | 0.36 |
| 湿地松P.elliottii | 0.00 | 0.05 | 0.73 | 0.23 | 0.00 | 0.46 |
| 青冈Q.glauca | 0.14 | 0.29 | 0.43 | 0.14 | 0.00 | 0.30 |
| 全林分Whole stand | 0.10 | 0.19 | 0.53 | 0.17 | 0.01 | 0.38 |
), ArticleFig(id=1266801747289850780, tenantId=1146029695717560320, journalId=1266358746360856629, articleId=1266801733377344313, language=CN, label=表9, caption=
不同权重因子的林分角尺度分布频率及均值
, figureFileSmall=null, figureFileBig=null, tableContent=
权重因子 Weighting factor | 树种 Species | 角尺度分布频率Distribution frequency of Wt | 平均角尺度 ${\bar{W}} $ |
| 0 | (0.00, 0.25] | (0.25, 0.50] | (0.50, 0.75] | (0.75, 1.00] |
估测胸径 ED | 苦槠C.sclerophylla | 0.17 | 0.13 | 0.56 | 0.14 | 0.00 | 0.34 |
| 湿地松P.elliottii | 0.00 | 0.00 | 0.73 | 0.27 | 0.00 | 0.46 |
| 青冈Q.glauca | 0.43 | 0.14 | 0.29 | 0.14 | 0.00 | 0.24 |
| 全林分Whole forest | 0.15 | 0.10 | 0.58 | 0.17 | 0.00 | 0.36 |
实测胸径 MD | 苦槠C.sclerophylla | 0.13 | 0.19 | 0.53 | 0.13 | 0.02 | 0.36 |
| 湿地松P.elliottii | 0.00 | 0.05 | 0.63 | 0.32 | 0.00 | 0.48 |
| 青冈Q.glauca | 0.43 | 0.14 | 0.43 | 0.00 | 0.00 | 0.18 |
| 全林分Whole forest | 0.12 | 0.15 | 0.56 | 0.16 | 0.01 | 0.38 |
实测综合 MS | 苦槠C.sclerophylla | 0.13 | 0.23 | 0.46 | 0.16 | 0.02 | 0.36 |
| 湿地松P.elliottii | 0.00 | 0.05 | 0.73 | 0.23 | 0.00 | 0.46 |
| 青冈Q.glauca | 0.14 | 0.29 | 0.43 | 0.14 | 0.00 | 0.30 |
| 全林分Whole stand | 0.10 | 0.19 | 0.53 | 0.17 | 0.01 | 0.38 |
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