In the study of oriented bounding boxes(OBB)object detection in high-resolution remote sensing images,the problem of missed and wrong detection of small targets occurs because the targets are too small and have differ...In the study of oriented bounding boxes(OBB)object detection in high-resolution remote sensing images,the problem of missed and wrong detection of small targets occurs because the targets are too small and have different orientations.Existing OBB object detection for remote sensing images,although making good progress,mainly focuses on directional modeling,while less consideration is given to the size of the object as well as the problem of missed detection.In this study,a method based on improved YOLOv8 was proposed for detecting oriented objects in remote sensing images,which can improve the detection precision of oriented objects in remote sensing images.Firstly,the ResCBAMG module was innovatively designed,which could better extract channel and spatial correlation information.Secondly,the innovative top-down feature fusion layer network structure was proposed in conjunction with the Efficient Channel Attention(ECA)attention module,which helped to capture inter-local cross-channel interaction information appropriately.Finally,we introduced an innovative ResCBAMG module between the different C2f modules and detection heads of the bottom-up feature fusion layer.This innovative structure helped the model to better focus on the target area.The precision and robustness of oriented target detection were also improved.Experimental results on the DOTA-v1.5 dataset showed that the detection Precision,mAP@0.5,and mAP@0.5:0.95 metrics of the improved model are better compared to the original model.This improvement is effective in detecting small targets and complex scenes.展开更多
In the present paper,the cladistics method is used to analyze the phylogenetic relationship of 16 genera of Tinginae (Hemiptera:Heteroptera:Tingidae) from northern China. 33 characters with 88 states were chosen based...In the present paper,the cladistics method is used to analyze the phylogenetic relationship of 16 genera of Tinginae (Hemiptera:Heteroptera:Tingidae) from northern China. 33 characters with 88 states were chosen based on the morphological comparison. The character matrix was formed through ingroup and outgroup analysis and computed using the computer programs MacClad (version 3 0 1), AutoDecay (version 3 0), PAUP (version 3 1 1) and Hennig 86 (version 1 5),and the same most parsimonious tree and Nelson consensus cladogram were obtained from both computation to explain the phylogenetic relationship among the genera (L=118,CI=0 454,RI=0 529). We categorized these genera involved in the analysis phylogenetically into 6 groups according to the results. They are Agramma group,Leptoypha group,Dictyla group,Catoplatus group,Physatocheila group and Derephysia group. The phylogenetic relationship among the involved genera is presented as (((((Derephysia group=( Lasiacantha ,( Acalypta ,( Galeatus ,( Dictyonota ,( Derephysia,Sphaerista ))))),Physatocheila group =(( Elasmotropis,Tingis ),(( Oncochila,Cochlochila ), Physatocheila ))),Catoplatus group= Catoplatus ),Dictyla group=( Monosteira,Dictyla )),Leptoypha group= Leptoypha ),Agramma group= Agramma ). These groups will not be regarded as higher classific taxa until more genera and data are available and further analysis are carried out.展开更多
This paper reports seven species of the genus Nymphicula Snellen from China. Nymphicula concaviuscula, sp. nov. is described as new to science. Nymphicula saigusai Yoshiyasu is reported for the first time from China. ...This paper reports seven species of the genus Nymphicula Snellen from China. Nymphicula concaviuscula, sp. nov. is described as new to science. Nymphicula saigusai Yoshiyasu is reported for the first time from China. The genitalia of the new species are illustrated. A key to the Chinese species of Nymphicula is provided.展开更多
A new algorithm based on an FC-tree （frequent closed pattern tree） and a max-FCIA （maximal frequent closed itemsets algorithm） is presented, which is used to mine the frequent closed itemsets for solving memory an...A new algorithm based on an FC-tree （frequent closed pattern tree） and a max-FCIA （maximal frequent closed itemsets algorithm） is presented, which is used to mine the frequent closed itemsets for solving memory and time consuming problems. This algorithm maps the transaction database by using a Hash table,gets the support of all frequent itemsets through operating the Hash table and forms a lexicographic subset tree including the frequent itemsets.Efficient pruning methods are used to get the FC-tree including all the minimum frequent closed itemsets through processing the lexicographic subset tree.Finally,frequent closed itemsets are generated from minimum frequent closed itemsets.The experimental results show that the mapping transaction database is introduced in the algorithm to reduce time consumption and to improve the efficiency of the program.Furthermore,the effective pruning strategy restrains the number of candidates,which saves space.The results show that the algorithm is effective.展开更多
Three new species of Blasticotomidae from China are described in the paper: Runaria shaanxinica Wei sp. nov., Runaria hunannica Wei sp. nov. and Runaria punctata Wei sp. nov. A new generic synonym is propo...Three new species of Blasticotomidae from China are described in the paper: Runaria shaanxinica Wei sp. nov., Runaria hunannica Wei sp. nov. and Runaria punctata Wei sp. nov. A new generic synonym is proposed; Runaria Malaise 1931 = Bohea Maa 1944 syn. nov. Keys are given to known genera of the family Blasticotomidae and known species of the genera Blasticotoma Klug and Runaria Malaise both also with a checklist of known species. A new combination is erected for Bohea abrupta Maa: Runaria abrupta (Maa) comb. nov.. The zoogeography of Blasticotomidae is also briefly discussed. Type materials are deposited in the Insect Collection of Central South Forestry University, Zhuzhou, China.展开更多
Three genera, Cuspicona Dallas, Hermolaus Distant and Oncinoproctus Breddin, and six species （Cuspicona antica Vollenhoven, Hermolaus typicus Distant, Menida atkinsoni Distant, Oncinoproctus griseolus Breddin, Paterc...Three genera, Cuspicona Dallas, Hermolaus Distant and Oncinoproctus Breddin, and six species （Cuspicona antica Vollenhoven, Hermolaus typicus Distant, Menida atkinsoni Distant, Oncinoproctus griseolus Breddin, Paterculus aberrans Distant, and Rolstoniellus malacanicus （Yang）） of Pentatomidae are reported from China for the first time. Both dorsal and ventral habitus and genital illustrations of each species are provided. All specimens studied were from Institute of Entomology, Nankai University, Tianjin, China （NKUM） except Cuspicona antica Vollenhoven, 1868 whose involved species are kept at the Institute of Zoology, Chinese Academy of Sciences （IZCAS）.展开更多
文摘In the study of oriented bounding boxes(OBB)object detection in high-resolution remote sensing images,the problem of missed and wrong detection of small targets occurs because the targets are too small and have different orientations.Existing OBB object detection for remote sensing images,although making good progress,mainly focuses on directional modeling,while less consideration is given to the size of the object as well as the problem of missed detection.In this study,a method based on improved YOLOv8 was proposed for detecting oriented objects in remote sensing images,which can improve the detection precision of oriented objects in remote sensing images.Firstly,the ResCBAMG module was innovatively designed,which could better extract channel and spatial correlation information.Secondly,the innovative top-down feature fusion layer network structure was proposed in conjunction with the Efficient Channel Attention(ECA)attention module,which helped to capture inter-local cross-channel interaction information appropriately.Finally,we introduced an innovative ResCBAMG module between the different C2f modules and detection heads of the bottom-up feature fusion layer.This innovative structure helped the model to better focus on the target area.The precision and robustness of oriented target detection were also improved.Experimental results on the DOTA-v1.5 dataset showed that the detection Precision,mAP@0.5,and mAP@0.5:0.95 metrics of the improved model are better compared to the original model.This improvement is effective in detecting small targets and complex scenes.
文摘In the present paper,the cladistics method is used to analyze the phylogenetic relationship of 16 genera of Tinginae (Hemiptera:Heteroptera:Tingidae) from northern China. 33 characters with 88 states were chosen based on the morphological comparison. The character matrix was formed through ingroup and outgroup analysis and computed using the computer programs MacClad (version 3 0 1), AutoDecay (version 3 0), PAUP (version 3 1 1) and Hennig 86 (version 1 5),and the same most parsimonious tree and Nelson consensus cladogram were obtained from both computation to explain the phylogenetic relationship among the genera (L=118,CI=0 454,RI=0 529). We categorized these genera involved in the analysis phylogenetically into 6 groups according to the results. They are Agramma group,Leptoypha group,Dictyla group,Catoplatus group,Physatocheila group and Derephysia group. The phylogenetic relationship among the involved genera is presented as (((((Derephysia group=( Lasiacantha ,( Acalypta ,( Galeatus ,( Dictyonota ,( Derephysia,Sphaerista ))))),Physatocheila group =(( Elasmotropis,Tingis ),(( Oncochila,Cochlochila ), Physatocheila ))),Catoplatus group= Catoplatus ),Dictyla group=( Monosteira,Dictyla )),Leptoypha group= Leptoypha ),Agramma group= Agramma ). These groups will not be regarded as higher classific taxa until more genera and data are available and further analysis are carried out.
基金The project was supported by Natural Science Foundation of Tianjin ( 0 2 361 40 1 1 )
文摘This paper reports seven species of the genus Nymphicula Snellen from China. Nymphicula concaviuscula, sp. nov. is described as new to science. Nymphicula saigusai Yoshiyasu is reported for the first time from China. The genitalia of the new species are illustrated. A key to the Chinese species of Nymphicula is provided.
基金The National Natural Science Foundation of China(No.60603047)the Natural Science Foundation of Liaoning ProvinceLiaoning Higher Education Research Foundation(No.2008341)
文摘A new algorithm based on an FC-tree （frequent closed pattern tree） and a max-FCIA （maximal frequent closed itemsets algorithm） is presented, which is used to mine the frequent closed itemsets for solving memory and time consuming problems. This algorithm maps the transaction database by using a Hash table,gets the support of all frequent itemsets through operating the Hash table and forms a lexicographic subset tree including the frequent itemsets.Efficient pruning methods are used to get the FC-tree including all the minimum frequent closed itemsets through processing the lexicographic subset tree.Finally,frequent closed itemsets are generated from minimum frequent closed itemsets.The experimental results show that the mapping transaction database is introduced in the algorithm to reduce time consumption and to improve the efficiency of the program.Furthermore,the effective pruning strategy restrains the number of candidates,which saves space.The results show that the algorithm is effective.
文摘Three new species of Blasticotomidae from China are described in the paper: Runaria shaanxinica Wei sp. nov., Runaria hunannica Wei sp. nov. and Runaria punctata Wei sp. nov. A new generic synonym is proposed; Runaria Malaise 1931 = Bohea Maa 1944 syn. nov. Keys are given to known genera of the family Blasticotomidae and known species of the genera Blasticotoma Klug and Runaria Malaise both also with a checklist of known species. A new combination is erected for Bohea abrupta Maa: Runaria abrupta (Maa) comb. nov.. The zoogeography of Blasticotomidae is also briefly discussed. Type materials are deposited in the Insect Collection of Central South Forestry University, Zhuzhou, China.
基金supported by the Fundamental Research Funds for the Central Universities (65012421)the National Natural Science Foundation (30870328,J0930005)
文摘Three genera, Cuspicona Dallas, Hermolaus Distant and Oncinoproctus Breddin, and six species （Cuspicona antica Vollenhoven, Hermolaus typicus Distant, Menida atkinsoni Distant, Oncinoproctus griseolus Breddin, Paterculus aberrans Distant, and Rolstoniellus malacanicus （Yang）） of Pentatomidae are reported from China for the first time. Both dorsal and ventral habitus and genital illustrations of each species are provided. All specimens studied were from Institute of Entomology, Nankai University, Tianjin, China （NKUM） except Cuspicona antica Vollenhoven, 1868 whose involved species are kept at the Institute of Zoology, Chinese Academy of Sciences （IZCAS）.
