A Method for Measuring the Variation Distribution of Stand Stock
A stand volume and stand technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problem of low measurement accuracy and reliability, heavy workload, and large measurement workload and other issues to achieve the effect of reducing human workload and improving work efficiency
Active Publication Date: 2017-09-05
BEIJING FORESTRY UNIVERSITY
View PDF3 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0005] ①Using the method of checking rulers per tree for stand volume measurement is only suitable for small-scale precise measurement, and the workload required for large-scale stand surveys is too large and the efficiency is very low;
[0006] ②Using the traditional plot calibration method to measure stand accumulation, the distance between the layout points is particularly important. When the distance is relatively short, the workload of the measurement is relatively large. When the distance is long, the accuracy and reliability of the measurement are not reliable. powerful;
[0007] Therefore, in the process of measuring stand volume, there are obvious shortcomings and errors in the observation using the method of measuring the ruler of each tree and the traditional method of plot calibration.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0021] Compared with the previous measurement method, the process of determining the variation distribution of stand volume has been greatly improved. The specific implementation process is as follows:
[0022] 1) Select the forest stand, and select the appropriate sectional area coefficient Fg according to factors such as the average diameter of the stand, density, visibility conditions, and tree distribution. Among them, we often choose four types of Fg: 0.5, 1.0, 2.0 and 4.0 , representing young forest, middle-aged forest, mature forest and over-mature forest, respectively.
[0023] 2) Define the corresponding forest stand conditions according to certain rules, carry out mechanical layout, and use GPS to locate each layout point. It is required that the distance between layout points is d=30-50m (d is an integer), and the number of layout points is greater than or equal to 36, and as much as possible. 200 points.
[0024] 3) At each layout point, perform tree observation a...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a technological method for measuring forest stand volume variation distribution. The technological method comprises the steps that according to forest stand conditions, an appropriate section area coefficient Fg is selected, forest stand is selected, mechanical point distribution is conducted, each distributed point is located through GPS, forest tree observation is conducted according to the Fg of each point, and the number Ni of trees within per hectare is recorded; wherein i ranges from 1 to n; the forest stand volume V is worked out, the covariance of the points is determined according to the intervals as d, 2d, ... , rd, ... , nd, and then a variation distribution function of the forest stand volume is obtained; the most appropriate distribution interval existing when the variance meets requirements during measurement of the forest stand volume is worked out, and the optical scheme of measurement of the forest stand volume is determined finally.
Description
[0001] 1. Technical field [0002] The invention relates to a method for measuring the distribution law of stand volume, in particular to a technical method for measuring the variation distribution of forest volume. [0003] 2. Technical background [0004] So far, the method of measuring forest stock volume mainly adopts the method of measuring the ruler of each tree and the method of plot calibration, but in the actual measurement process, the traditional measurement method has obvious shortcomings and deficiencies: [0005] ①Using the method of checking rulers per tree for stand volume measurement is only suitable for small-scale precise measurement, and the workload required for large-scale stand surveys is too large and the efficiency is very low; [0006] ②Using the traditional plot calibration method to measure stand accumulation, the distance between the layout points is particularly important. When the distance is relatively short, the workload of the measurement is re...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G06F19/00
Inventor 冯仲科刘金成邱梓轩
Owner BEIJING FORESTRY UNIVERSITY