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
A new adaptive cruise control (ACC) method based on the desired safety headway distance is investigated for improving the vehicle traffic safety at high speed by regulating the additional throttle opening and braking ...A new adaptive cruise control (ACC) method based on the desired safety headway distance is investigated for improving the vehicle traffic safety at high speed by regulating the additional throttle opening and braking torque of driving wheels only. The selection of headway distance sensors, the determination of desired safety headway distance and desired deceleration are elaborated. The ACC flowchart and simulation, as well as signal misinformation and its resolutions are described. The simulation proves that the new ACC method is simpler and feasible. The new method is easily integrated ACC with ABS/ASR to form an organic ABS/ASR/ACC system.展开更多
Aspecies in the bark lice family Calopsocidae is recorded from China and Vietnam for the first time. Anewly recorded species of the genus Calopsocus Hagen, 1866, Calopsocus infelix, is described. Calopsocus infelix ha...Aspecies in the bark lice family Calopsocidae is recorded from China and Vietnam for the first time. Anewly recorded species of the genus Calopsocus Hagen, 1866, Calopsocus infelix, is described. Calopsocus infelix has an orange head, yellowish brown thorax, and purple abdomen. Wings are broad, dark, slightly leathery, and densely setose. Female genitalia are complete, with a setose external valve.展开更多
The difficulty of multiple targets tracking is how to quickly fulfill the target matching from one flame image to another and fix the position of the target. In order to accurately choose target feature information fo...The difficulty of multiple targets tracking is how to quickly fulfill the target matching from one flame image to another and fix the position of the target. In order to accurately choose target feature information for reliable matching, simplify operations under the reliable precondition, and realize precise moving objects tracking, an approach based on Kalman prediction and feature matching was proposed. The position of the target in next frame image was predicted by Kalman, and then the moving objects of two adjacent frames were matched by the centroid and area methods. When occlusion occurs, the best matching result was found to realize tracking by matching matrix algorithm. The simulation results show that the proposed method can achieve multiple targets tracking accurately and in real-time under complicated motion movements.展开更多
Three new Tenthredinidae species are reported from Gansu and three from Qinghai Provinces of China. Tenthredo （Tenthredo） sinotemula sp. nov., Tenthredo （Tenthredella） labrangensis sp. nov. and Tenthredo （Tenthre...Three new Tenthredinidae species are reported from Gansu and three from Qinghai Provinces of China. Tenthredo （Tenthredo） sinotemula sp. nov., Tenthredo （Tenthredella） labrangensis sp. nov. and Tenthredo （Tenthredella） sinosimplex sp. nov. are described from Gansu, Tenthredo （Tenthredella） rolleri sp. nov., Tenthredo （Tenthredella） qinghaiensis sp. nov. and Tenthredo （Tenthredella） yunningsiensis sp. nov. from Qinghai Province.展开更多
Several studies have characterized the Yungas as a separate biogeographic unit, mainly based in floristic components. However, these characterizations were mainly qualitative and did not include faunal groups. The Yun...Several studies have characterized the Yungas as a separate biogeographic unit, mainly based in floristic components. However, these characterizations were mainly qualitative and did not include faunal groups. The Yungas have been assumed as a region with rich floral and faunal diversity, but without testing how well they are described by animal distributions. Our study consists of a formal analysis of endemism based on distribution of small mammals in the southernmost portion of the Yungas. This area is biogeographically very interesting because the Yungas are comprised of discontinuous fragments of forests that extend into temperate arid and semiarid habitats. As a first approximation, we contrasted a group of volant species （bats） versus a group of non-volant species （marsupials）. Our results show that small mammals are efficient indicators of endemism in Yungas. Eighty percent of the species of small marsupials included in the analysis supported the identified areas as being zones of endemism. Regarding bats, almost 55 percent of the species supported a designation of endemism. The results also show that the areas we considered are congruent with the botanical definition of the Yungas of northwestern Argentina and their subdivisions, an assumption that had not been previously tested with a formal quantitative method. We also found that non-volant species are better indicators of endemism than volant ones at regional scales, but volant species are better indicators than was previously thought.展开更多
Different planning methods have been applied in private and public infrastructure projects, which resulted in different approval procedures and querry about impartiality. However, planning methods of infrastructure pr...Different planning methods have been applied in private and public infrastructure projects, which resulted in different approval procedures and querry about impartiality. However, planning methods of infrastructure projects are seldom investigated up to now. The authors propose a proper project planning method which is applicable to all kinds of infrastructure projects with various funedorigins. The project planning method includes a comprehensive planning frame- work and a six-step planning process. The financial indicator, i. e. , self-reimbursement ratio is introduced for the proper division of financial obligation between government and project company.展开更多
A class of large-scale hierarchical control systems is considered, the overall objective function is a nonlinear and nonseparable function of multiple quadratic performance indices.The separation strategy of the multi...A class of large-scale hierarchical control systems is considered, the overall objective function is a nonlinear and nonseparable function of multiple quadratic performance indices.The separation strategy of the multiobjective optimization technique and the three-level objective coordination method are applied to the large -sacle systems, and a four-level hierarchical algorithms of optimization control is obtained.展开更多
Dudua trunciformis sp. nov. from Hainan and Taiwan, China is described and illustrated. A key to the Chinese species based on the male genitalia is provided.
A novel robot navigation algorithm with global path generation capability is presented. Local minimum is a most intractable but is an encountered frequently problem in potential field based robot navigation.Through ap...A novel robot navigation algorithm with global path generation capability is presented. Local minimum is a most intractable but is an encountered frequently problem in potential field based robot navigation.Through appointing appropriately some virtual local targets on the journey, it can be solved effectively. The key concept employed in this algorithm are the rules that govern when and how to appoint these virtual local targets. When the robot finds itself in danger of local minimum, a virtual local target is appointed to replace the global goal temporarily according to the rules. After the virtual target is reached, the robot continues on its journey by heading towards the global goal. The algorithm prevents the robot from running into local minima anymore. Simulation results showed that it is very effective in complex obstacle environments.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）.
文摘A new adaptive cruise control (ACC) method based on the desired safety headway distance is investigated for improving the vehicle traffic safety at high speed by regulating the additional throttle opening and braking torque of driving wheels only. The selection of headway distance sensors, the determination of desired safety headway distance and desired deceleration are elaborated. The ACC flowchart and simulation, as well as signal misinformation and its resolutions are described. The simulation proves that the new ACC method is simpler and feasible. The new method is easily integrated ACC with ABS/ASR to form an organic ABS/ASR/ACC system.
基金supported by the National Natural Science Foundation of China (31322051, 41271063)the Foundation for the Authors of National Excellent Doctoral Dissertations of PR China (201178)
文摘Aspecies in the bark lice family Calopsocidae is recorded from China and Vietnam for the first time. Anewly recorded species of the genus Calopsocus Hagen, 1866, Calopsocus infelix, is described. Calopsocus infelix has an orange head, yellowish brown thorax, and purple abdomen. Wings are broad, dark, slightly leathery, and densely setose. Female genitalia are complete, with a setose external valve.
基金Project(61172089) supported by the National Natural Science Foundation of China
文摘The difficulty of multiple targets tracking is how to quickly fulfill the target matching from one flame image to another and fix the position of the target. In order to accurately choose target feature information for reliable matching, simplify operations under the reliable precondition, and realize precise moving objects tracking, an approach based on Kalman prediction and feature matching was proposed. The position of the target in next frame image was predicted by Kalman, and then the moving objects of two adjacent frames were matched by the centroid and area methods. When occlusion occurs, the best matching result was found to realize tracking by matching matrix algorithm. The simulation results show that the proposed method can achieve multiple targets tracking accurately and in real-time under complicated motion movements.
文摘Three new Tenthredinidae species are reported from Gansu and three from Qinghai Provinces of China. Tenthredo （Tenthredo） sinotemula sp. nov., Tenthredo （Tenthredella） labrangensis sp. nov. and Tenthredo （Tenthredella） sinosimplex sp. nov. are described from Gansu, Tenthredo （Tenthredella） rolleri sp. nov., Tenthredo （Tenthredella） qinghaiensis sp. nov. and Tenthredo （Tenthredella） yunningsiensis sp. nov. from Qinghai Province.
文摘Several studies have characterized the Yungas as a separate biogeographic unit, mainly based in floristic components. However, these characterizations were mainly qualitative and did not include faunal groups. The Yungas have been assumed as a region with rich floral and faunal diversity, but without testing how well they are described by animal distributions. Our study consists of a formal analysis of endemism based on distribution of small mammals in the southernmost portion of the Yungas. This area is biogeographically very interesting because the Yungas are comprised of discontinuous fragments of forests that extend into temperate arid and semiarid habitats. As a first approximation, we contrasted a group of volant species （bats） versus a group of non-volant species （marsupials）. Our results show that small mammals are efficient indicators of endemism in Yungas. Eighty percent of the species of small marsupials included in the analysis supported the identified areas as being zones of endemism. Regarding bats, almost 55 percent of the species supported a designation of endemism. The results also show that the areas we considered are congruent with the botanical definition of the Yungas of northwestern Argentina and their subdivisions, an assumption that had not been previously tested with a formal quantitative method. We also found that non-volant species are better indicators of endemism than volant ones at regional scales, but volant species are better indicators than was previously thought.
基金Science Foundation of Jimei University(No.ZQ2007027)Youth Talent Program of Department of Science and Technology of Fujian Province(No.2008F3072)
文摘Different planning methods have been applied in private and public infrastructure projects, which resulted in different approval procedures and querry about impartiality. However, planning methods of infrastructure projects are seldom investigated up to now. The authors propose a proper project planning method which is applicable to all kinds of infrastructure projects with various funedorigins. The project planning method includes a comprehensive planning frame- work and a six-step planning process. The financial indicator, i. e. , self-reimbursement ratio is introduced for the proper division of financial obligation between government and project company.
文摘A class of large-scale hierarchical control systems is considered, the overall objective function is a nonlinear and nonseparable function of multiple quadratic performance indices.The separation strategy of the multiobjective optimization technique and the three-level objective coordination method are applied to the large -sacle systems, and a four-level hierarchical algorithms of optimization control is obtained.
基金supported by the National Natural Science Foundation of China (31000972)National Science Foundation for Fostering Talents in Basic Research of the National Natural Science Foundation of China (J1210063)Opening Foundation of Key Laboratory of Resource Biology and Biotechnology in Western China (Northwest University), Ministry of Education (ZS14009)
文摘Dudua trunciformis sp. nov. from Hainan and Taiwan, China is described and illustrated. A key to the Chinese species based on the male genitalia is provided.
文摘A novel robot navigation algorithm with global path generation capability is presented. Local minimum is a most intractable but is an encountered frequently problem in potential field based robot navigation.Through appointing appropriately some virtual local targets on the journey, it can be solved effectively. The key concept employed in this algorithm are the rules that govern when and how to appoint these virtual local targets. When the robot finds itself in danger of local minimum, a virtual local target is appointed to replace the global goal temporarily according to the rules. After the virtual target is reached, the robot continues on its journey by heading towards the global goal. The algorithm prevents the robot from running into local minima anymore. Simulation results showed that it is very effective in complex obstacle environments.
