In order to study reasonable tree structure parameters of Y-shaped pear orchards in natural conditions and at management technical level of Tai'an area, the tree structure and population structure of high-quality ...In order to study reasonable tree structure parameters of Y-shaped pear orchards in natural conditions and at management technical level of Tai'an area, the tree structure and population structure of high-quality and high-yielding Y-shaped pear orchards were investigated. The results showed that when the yield of Y-shaped 'Oshu' was 2 550 kg/667 m^2 in the early fully fruiting period, the quantity of the branches per 667 m^2 was about 54 000, and the number of short branches was the largest, accounting for 80.1% of total number of branches, followed by middle branches, long branches and developmental branches. As the yield of Y-shaped 'Qiuyue' was 2 875 kg/667 m^2 in the early fully fruiting period, the quantity of the branches per 667 m^2 was 51 000, and the number of short branches was the largest, accounting for 75.6% of total number of branches, followed by middle branches, long branches and developmental branches. When the yield of Y-shaped 'Niitaka' was 3 000 kg/667 m^2 in the early fully fruiting period, the quantity of the branches per 667 m^2 was 43 000, and the number of short branches was the largest, accounting for 82.0% of total number of branches, followed by long branches, middle branches and developmental branches.展开更多
ObjectiveThe thesis aims at investigating the distribution and structural characteristics of various branches in canopy of Korla fragrant pear. MethodStatistic work and analysis were conducted on the numbers and distr...ObjectiveThe thesis aims at investigating the distribution and structural characteristics of various branches in canopy of Korla fragrant pear. MethodStatistic work and analysis were conducted on the numbers and distribution characteristics of various branches in each cubic lattice by using the canopy cellular method. ResultThe results showed that： The total number of scaffold branches of evacuation layered tree shape was 97, which mainly distributed in the lower layer and middle part of the canopy; the total number of scaffold branches of open-center tree shape was 94, which mainly distributed in the lower layer and middle part of the canopy. The total number of annual branches of evacuation layered tree shape was 3 920, which mainly distributed in the middle layer and outer part of the canopy; and the total number of annual branches of the open-center tree shape was 3 183, which mainly distributed in middle layer and outer part of the canopy. The total number of perennial branches of evacuation layered tree shape was 2 184, which mainly distributed in lower layer and outer part of the canopy; the total number of perennial branches of open-center tree shape was 1 444, which mainly distributed in middle layer and outer part of the canopy. ConclusionThe total number and the distribution positions of scaffold branches in the canopy of each tree shape were basically the same. The total numbers of annual branches of the two kinds of tree shapes were different, but the distribution positions were basically the same. The total numbers and the distribution positions of perennial branches in the canopy of the two kinds of tree shapes were different.展开更多
In order to investigate the effect of dwarfing inter stock on the structure of pear trees,investigations were made to the tree and group structure of the 4-year-old spindle-shaped‘Huangguan'pear grafted with vigo...In order to investigate the effect of dwarfing inter stock on the structure of pear trees,investigations were made to the tree and group structure of the 4-year-old spindle-shaped‘Huangguan'pear grafted with vigorous stock( Pyrus betulaefolia stock) and that grafted with the dwarfing inter stock‘Zhong ai 1 hao'( P. betulaefolia rootstock). The results showed that the 4-year-old‘Huangguan'pear trees grafted with the dwarfing inter stock‘ Zhong ai 1 hao'were 2. 87 m high on average,with 70. 70% of short braches,converted into 21 016. 0 branches per 667 m^2,840. 64 m^2 of leaf area per 667 m^2 with the leaf area coefficient of 1. 75.On the other hand,for the‘Huangguan'trees grafted with vigorous stocks,the average tree height was 3. 17 m,and the short branch proportion was 63. 20%,converted into 15 806. 4 branches per 667 m^2,719. 28 m^2 of leaf area per 667 m^2 with the leaf area coefficient of 1. 55. Therefore,the use of dwarfing inter stock‘Zhong ai 1 hao'had significant dwarfing effect on‘Huangguan'pear trees,which also showed significant yield increasing effect.展开更多
A graph G is said to be determined by its spectrum if any graph having the same spectrum as G is isomorphic to G. An H-shape is a tree with exactly two of its vertices having maximal degree 3. In this paper, a formula...A graph G is said to be determined by its spectrum if any graph having the same spectrum as G is isomorphic to G. An H-shape is a tree with exactly two of its vertices having maximal degree 3. In this paper, a formula of counting the number of closed 6-walks is given on a graph, and some necessary conditions of a graph Γ cospectral to an H-shape are given.展开更多
For classifying unknown 3-D objects into a set of predetermined object classes, a part-level object classification method based on the improved interpretation tree is presented. The part-level representation is implem...For classifying unknown 3-D objects into a set of predetermined object classes, a part-level object classification method based on the improved interpretation tree is presented. The part-level representation is implemented, which enables a more compact shape description of 3-D objects. The proposed classification method consists of two key processing stages： the improved constrained search on an interpretation tree and the following shape similarity measure computation. By the classification method, both whole match and partial match with shape similarity ranks are achieved; especially, focus match can be accomplished, where different key parts may be labeled and all the matched models containing corresponding key parts may be obtained. A series of experiments show the effectiveness of the presented 3-D object classification method.展开更多
基金Supported by Special Project for Construction of National Pear Industry Technology System(CARS-28-36)National Natural Science Foundation of China(31601708)+3 种基金Agricultural Seed Improvement Project of Shandong Province,China(2016LZGC034)Foundation for Young Scholars of Shandong Academy of Agricultural Sciences(2015YQN40)National Science and Technology Plan of Rural Areas in the"12th Five-year Plan"Period of China(2014BAD16B03-4)Agricultural Science and Technology Innovation Project of Shandong Academy of Agricultural Sciences(CXGC2016B07)
文摘In order to study reasonable tree structure parameters of Y-shaped pear orchards in natural conditions and at management technical level of Tai'an area, the tree structure and population structure of high-quality and high-yielding Y-shaped pear orchards were investigated. The results showed that when the yield of Y-shaped 'Oshu' was 2 550 kg/667 m^2 in the early fully fruiting period, the quantity of the branches per 667 m^2 was about 54 000, and the number of short branches was the largest, accounting for 80.1% of total number of branches, followed by middle branches, long branches and developmental branches. As the yield of Y-shaped 'Qiuyue' was 2 875 kg/667 m^2 in the early fully fruiting period, the quantity of the branches per 667 m^2 was 51 000, and the number of short branches was the largest, accounting for 75.6% of total number of branches, followed by middle branches, long branches and developmental branches. When the yield of Y-shaped 'Niitaka' was 3 000 kg/667 m^2 in the early fully fruiting period, the quantity of the branches per 667 m^2 was 43 000, and the number of short branches was the largest, accounting for 82.0% of total number of branches, followed by long branches, middle branches and developmental branches.
基金Supported by National Department Public Benefit Research Foundation(201304701-4)Science and Technology Planning Program of Xinjiang Uygur Autonomous RegionXinjiang Uygur Autonomous Region Fruit Major Subjects~~
文摘ObjectiveThe thesis aims at investigating the distribution and structural characteristics of various branches in canopy of Korla fragrant pear. MethodStatistic work and analysis were conducted on the numbers and distribution characteristics of various branches in each cubic lattice by using the canopy cellular method. ResultThe results showed that： The total number of scaffold branches of evacuation layered tree shape was 97, which mainly distributed in the lower layer and middle part of the canopy; the total number of scaffold branches of open-center tree shape was 94, which mainly distributed in the lower layer and middle part of the canopy. The total number of annual branches of evacuation layered tree shape was 3 920, which mainly distributed in the middle layer and outer part of the canopy; and the total number of annual branches of the open-center tree shape was 3 183, which mainly distributed in middle layer and outer part of the canopy. The total number of perennial branches of evacuation layered tree shape was 2 184, which mainly distributed in lower layer and outer part of the canopy; the total number of perennial branches of open-center tree shape was 1 444, which mainly distributed in middle layer and outer part of the canopy. ConclusionThe total number and the distribution positions of scaffold branches in the canopy of each tree shape were basically the same. The total numbers of annual branches of the two kinds of tree shapes were different, but the distribution positions were basically the same. The total numbers and the distribution positions of perennial branches in the canopy of the two kinds of tree shapes were different.
基金Supported by the China Agriculture Research System(Pear)(CARS-28-36)the National Natural Science Foundation of China(31601708)+4 种基金the Agricultural Stock Breeding Project of Shandong Province(2016LZGC034)the Youth Foundation of Shandong Academy of Agricultural Sciences(2015YQN40)the National Science and Technology Plan for Rural Areas of China(2014BAD16B03-4)the Project for Agricultural Science and Technology Innovation of Shandong Academy of Agricultural Sciences(CXGC2018F03)the Key Science and Technology Innovation Project of Shandong Province(2018CXGC0208)
文摘In order to investigate the effect of dwarfing inter stock on the structure of pear trees,investigations were made to the tree and group structure of the 4-year-old spindle-shaped‘Huangguan'pear grafted with vigorous stock( Pyrus betulaefolia stock) and that grafted with the dwarfing inter stock‘Zhong ai 1 hao'( P. betulaefolia rootstock). The results showed that the 4-year-old‘Huangguan'pear trees grafted with the dwarfing inter stock‘ Zhong ai 1 hao'were 2. 87 m high on average,with 70. 70% of short braches,converted into 21 016. 0 branches per 667 m^2,840. 64 m^2 of leaf area per 667 m^2 with the leaf area coefficient of 1. 75.On the other hand,for the‘Huangguan'trees grafted with vigorous stocks,the average tree height was 3. 17 m,and the short branch proportion was 63. 20%,converted into 15 806. 4 branches per 667 m^2,719. 28 m^2 of leaf area per 667 m^2 with the leaf area coefficient of 1. 55. Therefore,the use of dwarfing inter stock‘Zhong ai 1 hao'had significant dwarfing effect on‘Huangguan'pear trees,which also showed significant yield increasing effect.
文摘A graph G is said to be determined by its spectrum if any graph having the same spectrum as G is isomorphic to G. An H-shape is a tree with exactly two of its vertices having maximal degree 3. In this paper, a formula of counting the number of closed 6-walks is given on a graph, and some necessary conditions of a graph Γ cospectral to an H-shape are given.
基金The National Basic Research Program of China(973Program)(No2006CB303105)the Research Foundation of Bei-jing Jiaotong University (NoK06J0170)
文摘For classifying unknown 3-D objects into a set of predetermined object classes, a part-level object classification method based on the improved interpretation tree is presented. The part-level representation is implemented, which enables a more compact shape description of 3-D objects. The proposed classification method consists of two key processing stages： the improved constrained search on an interpretation tree and the following shape similarity measure computation. By the classification method, both whole match and partial match with shape similarity ranks are achieved; especially, focus match can be accomplished, where different key parts may be labeled and all the matched models containing corresponding key parts may be obtained. A series of experiments show the effectiveness of the presented 3-D object classification method.
