A new species, lndoquedius qiuae sp. nov. in the genus lndoquedius Blackwelder, is described and illustrated from Sichuan, China. The species is similar to I. nonparallelus Zhao ＆ Zhou from Yunnan Province, but diffe...A new species, lndoquedius qiuae sp. nov. in the genus lndoquedius Blackwelder, is described and illustrated from Sichuan, China. The species is similar to I. nonparallelus Zhao ＆ Zhou from Yunnan Province, but differs in the aedeagus more narrowed at apical part of median lobe, paramere constricted drastically at the bottom, being more narrow and straight throughout whole length, sensory peg setae on underside less numerous, and deeper middle emargination of male sternite 9. It was found in Heizhugou Forest Park in Sichuan, China.展开更多
Ten species of Podagricomela Heikertinger from China are studied. They are Podagricomela apicipennis (Jacoby), P. cupera Wang, P. cyanea Chen, P. flavitibialis Wang, P. geminata Chen et Zia, P. nigricollis Chen, P. ni...Ten species of Podagricomela Heikertinger from China are studied. They are Podagricomela apicipennis (Jacoby), P. cupera Wang, P. cyanea Chen, P. flavitibialis Wang, P. geminata Chen et Zia, P. nigricollis Chen, P. nigripes Medvedev, P. parva Chen et Zia, P. shirahatai (Ch?j?), and P. weisei Heikertinger. Among them, P. nigripes Medvedev is recorded for the first time from China. A key to species from China is given. Illustrations of the male aedeagus and female spermatheca of each species are also given. The geographical distribution in China is analyzed briefly. The result indicates that Podagricomela mainly occurs in southern China, southwestern China, central China and north China, and the distribution center of this genus is in China. They always feed on Rutaceae.展开更多
Nine families and 12 genera of Chalcidoidea were found in paddy fields from Wuhu, Anhui Province. An illustrated key to the nine families and a general diagnosis of the families are provided.
The male genitalia of Caryanda cyclata Zheng, 2008 is described. A new species, Caryanda jiangchenga sp. nov. is described and illustrated. The conception of a Caryanda dentata species group is proposed to contain C. ...The male genitalia of Caryanda cyclata Zheng, 2008 is described. A new species, Caryanda jiangchenga sp. nov. is described and illustrated. The conception of a Caryanda dentata species group is proposed to contain C. dentata Mao ＆ Ou, 2006 and the above two species. Akey to the known species of this C. dentata species group is provided.展开更多
Two new species, Caryanda caesinota Mao Li sp. nov. and Caryanda heterochromia Mao Huang sp. nov., are described and illustrated. The concept of the Caryanda nigrospina species group is proposed to contain C. nigrospi...Two new species, Caryanda caesinota Mao Li sp. nov. and Caryanda heterochromia Mao Huang sp. nov., are described and illustrated. The concept of the Caryanda nigrospina species group is proposed to contain C. nigrospina Mao, Ren Ou, 2011 and the above two species. A key to the known species of this C. nigrospina species group is provided.展开更多
Indoquedius lii sp.nov.is described from Yunnan,China.The number of Indoquedius species has thus increased to 39.Color images of the habitus,sternites,tergite and aedeagus of this new species are included.A key to spe...Indoquedius lii sp.nov.is described from Yunnan,China.The number of Indoquedius species has thus increased to 39.Color images of the habitus,sternites,tergite and aedeagus of this new species are included.A key to species in the genus Indoquedius of Yunnan is provided.展开更多
The male genitalia of Caryanda aurata Mao, Ren ＆ Ou, 2007 is redescribed. Two new species, C. nigrotibia sp. nov. and C. zhenyuanensis sp. nov. are described and illustrated. The concept of the Caryanda aurata specie...The male genitalia of Caryanda aurata Mao, Ren ＆ Ou, 2007 is redescribed. Two new species, C. nigrotibia sp. nov. and C. zhenyuanensis sp. nov. are described and illustrated. The concept of the Caryanda aurata species group is proposed to include these three species mentioned above, as well as C. colourfula Mao, Ren ＆ Ou, 2011. The key to known species of C. aurata species group is provided.展开更多
This paper describes and illustrates a new species of Opalimosina Rohacek from Liaoning, Northeast China, namely Opalimosina(Opalimosina) verruca sp. nov., and provides a distribution map and a key to Chinese Opalimos...This paper describes and illustrates a new species of Opalimosina Rohacek from Liaoning, Northeast China, namely Opalimosina(Opalimosina) verruca sp. nov., and provides a distribution map and a key to Chinese Opalimosina. The genus Opalimosina is a new record for Liaoning, Northeast China.展开更多
One new species in the genus Azpeytia(Diptera:Syrphidae)from Shaanxi,China,A.brunneteryla sp.nov.,is described.The new species differs from other species of Azpeytia by yellow brown wings and abdominal tergites 2 to 4...One new species in the genus Azpeytia(Diptera:Syrphidae)from Shaanxi,China,A.brunneteryla sp.nov.,is described.The new species differs from other species of Azpeytia by yellow brown wings and abdominal tergites 2 to 4 with an inverse V-shaped narrow gray-white pollinose strip medially.A species list and key to Chinese species in this genus are provided.展开更多
Abstract： The most popularly used fin types in compact heat exchangers are the serrated fins, wavy fins, louvered fins and plain fins. Amongst these fin types the serrated fins assume lot of importance due to its enh...Abstract： The most popularly used fin types in compact heat exchangers are the serrated fins, wavy fins, louvered fins and plain fins. Amongst these fin types the serrated fins assume lot of importance due to its enhanced thermo-hydraulic performance. Thermo-hydraulic design of CHEs （Compact heat exchangers） is strongly dependent upon the predicted/measured dimensionless performance （Colburnj factor and Fanning friction vs. Reynolds number） of heat transfer surfaces. This paper describes the numerical analysis to study the heat transfer coefficient and friction factor of Serrated fins in water medium. CFD （Computational fluid dynamics） methodology has been used to develop the single phase water heat transfer coefficient and friction factor correlations for serrated fins using ANSYS Fluent 14.5. The results are compared with previous air-cooled models and experimental results of water. The water cooled CFD analysis results shows that the Prandtl number has a large effect on the Nusselt number of the serrated fin geometry. Finally, the generalized correlations are developed for serrated fins taking all geometrical parameters into account. This numerical estimation can reduce the number of tests/experiments to a minimum for similar applications.展开更多
The outside serrated integral-fin tubes fabricated by rolling-plowing-extrusion processing were surface-treated through different processes of annealing in hydrogen atmosphere,electrochemical corrosion or sandblasting...The outside serrated integral-fin tubes fabricated by rolling-plowing-extrusion processing were surface-treated through different processes of annealing in hydrogen atmosphere,electrochemical corrosion or sandblasting.The purpose was to eliminate residual stress,clear secondary micro-fins and enhance heat transfer performance.By comparing the surface characteristics,it is found that the finned tubes treated by electrochemical corrosion have the most glabrous surfaces where the fins are almost perfectly reserved.Clear layer cracks can be observed on the top of the fins.These structures are effective in enhancing heat transfer performance when being applied to flow heat exchange.Therefore,the finned tubes treated by electrochemical corrosion are proper for the tubular exchanger with water coolant.The finned tubes treated by sandblasting have rougher surfaces with layer cracks and micro gaps removed.As these structures are useful to clearing adhesive feculence,the tubes are more suitable for the tubular heat exchanger with oil coolant.展开更多
The microstructure, wettability and chemical composition of the butterfly wing surfaces were investigated by a scanning electron microscope, a contact angle meter and a Fourier transform infrared spectrometer. The mic...The microstructure, wettability and chemical composition of the butterfly wing surfaces were investigated by a scanning electron microscope, a contact angle meter and a Fourier transform infrared spectrometer. The micro/nano structural models for hydrophobicity of the butterfly wing surfaces were established on the basis of the Cassie equation. The hydrophobicity mechanisms were discussed from the perspective of biological coupling. The butterfly wing surfaces are composed of naturally hydrophobic material and possess micro/nano hierarchical structures, including primary structure （micrometric scales）, secondary structure （nano longitudinal ridges and lateral bridges） and tertiary structure （nano stripes）. The wing surfaces exhibit high hydrophobicity （contact angle 138°-157°） and low adhesion （sliding angle 1°-3°）. The micromorphology and self-cleaning performance of the wing surfaces demonstrate remarkable anisotropism. The special complex wettability ascribes to a coupling effect of the material element and the structure element. In microdimension, the smaller the width and the bigger the spacing of the scale, the stronger the hydrophobicity of the wing surfaces. In nano-dimension, the smaller the height and the smaller the width and the bigger the spacing of the longitudinal ridge, the stronger the hydrophobicity of the wing surfaces. This work promotes our understanding of the hydrophobicity mechanism of bio-surfaces and may bring inspiration for biomimetic design and preparation of smart interfacial materials.展开更多
文摘A new species, lndoquedius qiuae sp. nov. in the genus lndoquedius Blackwelder, is described and illustrated from Sichuan, China. The species is similar to I. nonparallelus Zhao ＆ Zhou from Yunnan Province, but differs in the aedeagus more narrowed at apical part of median lobe, paramere constricted drastically at the bottom, being more narrow and straight throughout whole length, sensory peg setae on underside less numerous, and deeper middle emargination of male sternite 9. It was found in Heizhugou Forest Park in Sichuan, China.
文摘Ten species of Podagricomela Heikertinger from China are studied. They are Podagricomela apicipennis (Jacoby), P. cupera Wang, P. cyanea Chen, P. flavitibialis Wang, P. geminata Chen et Zia, P. nigricollis Chen, P. nigripes Medvedev, P. parva Chen et Zia, P. shirahatai (Ch?j?), and P. weisei Heikertinger. Among them, P. nigripes Medvedev is recorded for the first time from China. A key to species from China is given. Illustrations of the male aedeagus and female spermatheca of each species are also given. The geographical distribution in China is analyzed briefly. The result indicates that Podagricomela mainly occurs in southern China, southwestern China, central China and north China, and the distribution center of this genus is in China. They always feed on Rutaceae.
基金supported by the Natural Science Foundation of Education Department of Anhui Province (KJ2011A133)the Science Project of Wuhu City (2010-6-11)
文摘Nine families and 12 genera of Chalcidoidea were found in paddy fields from Wuhu, Anhui Province. An illustrated key to the nine families and a general diagnosis of the families are provided.
基金supported by the National Natural Science Foundation of China(30960057,31260520)
文摘The male genitalia of Caryanda cyclata Zheng, 2008 is described. A new species, Caryanda jiangchenga sp. nov. is described and illustrated. The conception of a Caryanda dentata species group is proposed to contain C. dentata Mao ＆ Ou, 2006 and the above two species. Akey to the known species of this C. dentata species group is provided.
基金supported by the National Natural Science Foundation of China(31260520,31260523)
文摘Two new species, Caryanda caesinota Mao Li sp. nov. and Caryanda heterochromia Mao Huang sp. nov., are described and illustrated. The concept of the Caryanda nigrospina species group is proposed to contain C. nigrospina Mao, Ren Ou, 2011 and the above two species. A key to the known species of this C. nigrospina species group is provided.
基金supported by the Yunnan Forestry and Grassland Bureau(Yun[2020]TG12).
文摘Indoquedius lii sp.nov.is described from Yunnan,China.The number of Indoquedius species has thus increased to 39.Color images of the habitus,sternites,tergite and aedeagus of this new species are included.A key to species in the genus Indoquedius of Yunnan is provided.
基金supported by the National Natural Science Foundation of China (31260520, 31560605)
文摘The male genitalia of Caryanda aurata Mao, Ren ＆ Ou, 2007 is redescribed. Two new species, C. nigrotibia sp. nov. and C. zhenyuanensis sp. nov. are described and illustrated. The concept of the Caryanda aurata species group is proposed to include these three species mentioned above, as well as C. colourfula Mao, Ren ＆ Ou, 2011. The key to known species of C. aurata species group is provided.
基金partly supported by the National Natural Science Foundation of China (31772541)the Natural Science Foundation of Liaoning Province (20170540642)the General Project of Scientific Research of the Education Department of Liaoning Province (L2015359)
文摘This paper describes and illustrates a new species of Opalimosina Rohacek from Liaoning, Northeast China, namely Opalimosina(Opalimosina) verruca sp. nov., and provides a distribution map and a key to Chinese Opalimosina. The genus Opalimosina is a new record for Liaoning, Northeast China.
基金supported by the Natural Science Major Project in Shaanxi Province of China(2019JZ-34)the National Natural Science Foundation of China(31900345)+4 种基金Shaanxi Provincial Science and Technology Department Project(2021JQ-757)Shaanxi Provincial Education Department Project(21JK0555)Shaanxi Forestry Department Project(SXRCZB209-ZC-DY1002)the Foundation of Shaanxi University of Technology(SLGRC13)the Opening Foundation of Shaanxi University of Technology(SLGPT2019KF02-02)。
文摘One new species in the genus Azpeytia(Diptera:Syrphidae)from Shaanxi,China,A.brunneteryla sp.nov.,is described.The new species differs from other species of Azpeytia by yellow brown wings and abdominal tergites 2 to 4 with an inverse V-shaped narrow gray-white pollinose strip medially.A species list and key to Chinese species in this genus are provided.
文摘Abstract： The most popularly used fin types in compact heat exchangers are the serrated fins, wavy fins, louvered fins and plain fins. Amongst these fin types the serrated fins assume lot of importance due to its enhanced thermo-hydraulic performance. Thermo-hydraulic design of CHEs （Compact heat exchangers） is strongly dependent upon the predicted/measured dimensionless performance （Colburnj factor and Fanning friction vs. Reynolds number） of heat transfer surfaces. This paper describes the numerical analysis to study the heat transfer coefficient and friction factor of Serrated fins in water medium. CFD （Computational fluid dynamics） methodology has been used to develop the single phase water heat transfer coefficient and friction factor correlations for serrated fins using ANSYS Fluent 14.5. The results are compared with previous air-cooled models and experimental results of water. The water cooled CFD analysis results shows that the Prandtl number has a large effect on the Nusselt number of the serrated fin geometry. Finally, the generalized correlations are developed for serrated fins taking all geometrical parameters into account. This numerical estimation can reduce the number of tests/experiments to a minimum for similar applications.
基金Projects(50675070,50930005) supported by the National Natural Science Foundation of ChinaProject(U0834002) supported by the Natural Science Foundation of Guangdong Province,China
文摘The outside serrated integral-fin tubes fabricated by rolling-plowing-extrusion processing were surface-treated through different processes of annealing in hydrogen atmosphere,electrochemical corrosion or sandblasting.The purpose was to eliminate residual stress,clear secondary micro-fins and enhance heat transfer performance.By comparing the surface characteristics,it is found that the finned tubes treated by electrochemical corrosion have the most glabrous surfaces where the fins are almost perfectly reserved.Clear layer cracks can be observed on the top of the fins.These structures are effective in enhancing heat transfer performance when being applied to flow heat exchange.Therefore,the finned tubes treated by electrochemical corrosion are proper for the tubular exchanger with water coolant.The finned tubes treated by sandblasting have rougher surfaces with layer cracks and micro gaps removed.As these structures are useful to clearing adhesive feculence,the tubes are more suitable for the tubular heat exchanger with oil coolant.
基金supported by the National Natural Science Foundation of China(50875108)the Natural Science Foundation of Jilin Province,China(201115162)the Open Fundof Key Laboratory of Bionic Engineering of Ministry of Education,Jilin University(K201004)
文摘The microstructure, wettability and chemical composition of the butterfly wing surfaces were investigated by a scanning electron microscope, a contact angle meter and a Fourier transform infrared spectrometer. The micro/nano structural models for hydrophobicity of the butterfly wing surfaces were established on the basis of the Cassie equation. The hydrophobicity mechanisms were discussed from the perspective of biological coupling. The butterfly wing surfaces are composed of naturally hydrophobic material and possess micro/nano hierarchical structures, including primary structure （micrometric scales）, secondary structure （nano longitudinal ridges and lateral bridges） and tertiary structure （nano stripes）. The wing surfaces exhibit high hydrophobicity （contact angle 138°-157°） and low adhesion （sliding angle 1°-3°）. The micromorphology and self-cleaning performance of the wing surfaces demonstrate remarkable anisotropism. The special complex wettability ascribes to a coupling effect of the material element and the structure element. In microdimension, the smaller the width and the bigger the spacing of the scale, the stronger the hydrophobicity of the wing surfaces. In nano-dimension, the smaller the height and the smaller the width and the bigger the spacing of the longitudinal ridge, the stronger the hydrophobicity of the wing surfaces. This work promotes our understanding of the hydrophobicity mechanism of bio-surfaces and may bring inspiration for biomimetic design and preparation of smart interfacial materials.
