Refers to total stock volume of wood growing in forest area , which shows the total size and level of forest resources of a country or a region 指森林面积上生长着的林木树干材积总量，是反映一个国家或地区森林资源总规模和水平的重要指标。
We have extensive experience in locating , preparing and shipping plants in many sizes and volume and landscape materials to meet exacting quarantine and quality requirements 我们可提供相关指定的植物安排运输及采购，包含各型植物材积以及景观与土壤等要求以符合并提供各国家检疫的要求。
The design of the log volume measuring system by computer vision is reasonable , and measuring principles has a sound theoretical basis . the hardware of the system is simple and practical , while the software interface is easy to operate 原木材积计算机视觉检测系统的设计合理，检测原理具有坚实的理论基础，硬件配置简单、实用，软件界面操作方便。
The dissertation designed the software architecture of log volume computer vision automatic measuring system , programmed the software , demonstrated the measuring principles of the system at length , and proved the feasibility and rationality of the system design 本文设计了原木材积计算机视觉检测系统的软件结构，编制了系统软件，详细论证了系统检测原理，证明了系统设计的可行性和合理性。
This measuring system is to recognize the log " s cross - section and the log " s axial profile in the image through the processing on the images , get the area value of cross - section and log length , so have the volume value by a certain formula for volume 本系统通过处理原木图像，识别出图像中原木横截面和原木轴向廓形，从而计算出原木的横截面面积和材长，经一定的材积计算公式得出原木的材积值。
This paper gives a survey on experimental forestland . 25 tree species were selected , and arranged in order by average diameter at breast height , average height , average individual volume and annual average volume increment in a unit area in this experiment 摘要简要介绍了试验林地的概况，选择了25个树种进行试验，并按各树种林分平均胸径、平均树高、平均单株材积和平均单位面积蓄积的年平均生长量进行排序。
Through the stand investigation by setting up the sample site , the investigation results showed that the average dbh of 15 - year - old alniqhtllm fortunei planted under nature was 60 % larger than that of 17 - year - old pinus massoniana plantation under the same condition , the average tree height of the above was 38 % larger than that of the latter , the average single - tree volume of the above was 3 . 2 times higher than that of the latter , the above showed the absolute dominance in stands 摘要设立标准地进行林分调查，在标准地中选取拟赤杨标准木进行树干解析，采用生长对比方式分析拟赤杨在马尾松人工林中的生长情况，调查结果表明，在同一环境条件下， 15年生天然下种的拟赤杨比17年生马尾松人工林平均胸径大60 % ，平均树高高38 % ，平均单株材积大3 . 2倍，在林分中表现出绝对优势。
Through the multi - character correlation degree analysis of p . massoniana family , 37 families whose volume growth was high and whose fruit - bearing character was good , 10 families whose volume growth was moderate and whose fruit - bearing character was good as well as 7 families whose volume growth was high and whose fruit - bearing character was moderate were selected 通过马尾松家系多性状的关联度分析，评选出材积生长量高且结实性状好的家系37个，材积生长量中等且结实性状好的家系10个，材积生长量高且结实性状中等的家系7个。
