Elaphropeza is distributed worldwide with over 220 known species,of which 61 species were known to occur in China.Two species of Elaphropeza are reported from Chongqing for the first time.One species,Elaphropeza chong...Elaphropeza is distributed worldwide with over 220 known species,of which 61 species were known to occur in China.Two species of Elaphropeza are reported from Chongqing for the first time.One species,Elaphropeza chongqingana sp.nov.,is described as new to science.A key to the species of Elaphropeza from Chongqing is presented.展开更多
A new armoured scale,Diaonidia litsea sp.nov.,is described and illustrated.It was found on Litsea monopetala(Roxb.)Pers.in Hainan,China.This new species can be easily distinguished by:the anterior spiracles each with ...A new armoured scale,Diaonidia litsea sp.nov.,is described and illustrated.It was found on Litsea monopetala(Roxb.)Pers.in Hainan,China.This new species can be easily distinguished by:the anterior spiracles each with 2–3 discoidal glands;pygidium with 2 pairs of well-developed lobes,and the area around mouthpart strongly sclerotized.An identification key to the adult females in the genus Diaonidia is also provided.展开更多
The fifth species in the genus Lepidodens was reported from Wuyanling National Natural Reserve.Lepidodens taishunensis Lin,Wu&Pan sp.nov.is the second new species of this genus recorded from Zhejiang Province.This...The fifth species in the genus Lepidodens was reported from Wuyanling National Natural Reserve.Lepidodens taishunensis Lin,Wu&Pan sp.nov.is the second new species of this genus recorded from Zhejiang Province.This new species could be discriminated from others species in this genus by colour pattern,labial chaetae E and R ciliated,dorsal Abd.Ⅰ–Ⅲand centrodorsal Abd.Ⅳwith 2/4/7/8 macrochaetae.A detailed comparison among the five Lepidodens species,dorsal body chaetotaxy of larvae and key to species of the genus were provided.展开更多
Acoustic emission(AE)source localization is a fundamental element of rock fracture damage imaging.To improve the efficiency and accuracy of AE source localization,this paper proposes a joint method comprising a three-...Acoustic emission(AE)source localization is a fundamental element of rock fracture damage imaging.To improve the efficiency and accuracy of AE source localization,this paper proposes a joint method comprising a three-dimensional(3D)AE source localization simplex method and grid search scanning.Using the concept of the geometry of simplexes,tetrahedral iterations were first conducted to narrow down the suspected source region.This is followed by a process of meshing the region and node searching to scan for optimal solutions,until the source location is determined.The resulting algorithm was tested using the artificial excitation source localization and uniaxial compression tests,after which the localization results were compared with the simplex and exhaustive methods.The results revealed that the localization obtained using the proposed method is more stable and can be effectively avoided compared with the simplex localization method.Furthermore,compared with the global scanning method,the proposed method is more efficient,with an average time of 10%–20%of the global scanning localization algorithm.Thus,the proposed algorithm is of great significance for laboratory research focused on locating rupture damages sustained by large-sized rock masses or test blocks.展开更多
Two new species of Mukariini,Tiaobeinia coarseata sp.nov.from Shaanxi and Tiaobeinia yuani sp.nov.from Gansu,are described.Detailed morphological descriptions and illustrations of these new species are given.A checkli...Two new species of Mukariini,Tiaobeinia coarseata sp.nov.from Shaanxi and Tiaobeinia yuani sp.nov.from Gansu,are described.Detailed morphological descriptions and illustrations of these new species are given.A checklist of all known species in this tribe from China is provided and a key is proposed for all species of Tiaobeinia.展开更多
A study was conducted to analyze the deformation mechanism of strongly weathered quartz schist in the Daliangshan Tunnel,located in the western Transverse Mountain area.A large deformation problem was experienced duri...A study was conducted to analyze the deformation mechanism of strongly weathered quartz schist in the Daliangshan Tunnel,located in the western Transverse Mountain area.A large deformation problem was experienced during the tunnel construction.To mitigate this problem,a support system was designed incorporating negative Poisson ratio(NPR)anchor cables with negative Poisson ratio effect.Physical model experiments,field experiments,and numerical simulation experiments were conducted to investigate the compensation mechanical behavior of NPR anchor cables.The large deformations of soft rocks in the Daliangshan Tunnel are caused by a high ground stress,a high degree of joint fracture development,and a high degree of surrounding rock fragmentation.A compensation mechanics support system combining long and short NPR anchor cables was suggested to provide sufficient counter-support force(approximately 350 kN)for the surrounding rock inside the tunnel.Comparing the NPR anchor cable support system with the original support system used in the Daliangshan tunnel showed that an NPR anchor cable support system,combining cables of 6.3 m and 10.3 m in length,effectively prevented convergence of surrounding rock deformation,and the integrated settlement convergence value remained below 300 mm.This study provides an effective scientific basis for resolving large deformation problems in deeply buried soft rocks in western transverse mountain areas.展开更多
基金supported by the National Natural Science Foundation of China(31970444)。
文摘Elaphropeza is distributed worldwide with over 220 known species,of which 61 species were known to occur in China.Two species of Elaphropeza are reported from Chongqing for the first time.One species,Elaphropeza chongqingana sp.nov.,is described as new to science.A key to the species of Elaphropeza from Chongqing is presented.
基金supported by Scientific Research Platforms and Projects in Universities in Guangdong,China(2022KCXTD050)Natural Science Innovation Project of Education Department of Guangdong Province(2021KTSCX255)。
文摘A new armoured scale,Diaonidia litsea sp.nov.,is described and illustrated.It was found on Litsea monopetala(Roxb.)Pers.in Hainan,China.This new species can be easily distinguished by:the anterior spiracles each with 2–3 discoidal glands;pygidium with 2 pairs of well-developed lobes,and the area around mouthpart strongly sclerotized.An identification key to the adult females in the genus Diaonidia is also provided.
基金supported by Zhejiang Provincial Natural Science Foundation of China(LTY20C030001)the program on“Collembola species diversity of Wuyanling National Nature Reserve”。
文摘The fifth species in the genus Lepidodens was reported from Wuyanling National Natural Reserve.Lepidodens taishunensis Lin,Wu&Pan sp.nov.is the second new species of this genus recorded from Zhejiang Province.This new species could be discriminated from others species in this genus by colour pattern,labial chaetae E and R ciliated,dorsal Abd.Ⅰ–Ⅲand centrodorsal Abd.Ⅳwith 2/4/7/8 macrochaetae.A detailed comparison among the five Lepidodens species,dorsal body chaetotaxy of larvae and key to species of the genus were provided.
基金supported by the Natural Science Foundation of Henan Province(No.222300420596)China Railway Science and Technology Innovation Program Funded Project(CZ02-Special-03)Science and Technology Innovation Project funded by China Railway Tunnel Group(Tunnel Research 2021-03)。
文摘Acoustic emission(AE)source localization is a fundamental element of rock fracture damage imaging.To improve the efficiency and accuracy of AE source localization,this paper proposes a joint method comprising a three-dimensional(3D)AE source localization simplex method and grid search scanning.Using the concept of the geometry of simplexes,tetrahedral iterations were first conducted to narrow down the suspected source region.This is followed by a process of meshing the region and node searching to scan for optimal solutions,until the source location is determined.The resulting algorithm was tested using the artificial excitation source localization and uniaxial compression tests,after which the localization results were compared with the simplex and exhaustive methods.The results revealed that the localization obtained using the proposed method is more stable and can be effectively avoided compared with the simplex localization method.Furthermore,compared with the global scanning method,the proposed method is more efficient,with an average time of 10%–20%of the global scanning localization algorithm.Thus,the proposed algorithm is of great significance for laboratory research focused on locating rupture damages sustained by large-sized rock masses or test blocks.
基金supported by the National Natural Science Foundation of China(3207047932270497)National key Research and Development Program"Intergovernmental Cooperation on International Science and Technology Innovation"Special Project(2022YFE0115200)。
文摘Two new species of Mukariini,Tiaobeinia coarseata sp.nov.from Shaanxi and Tiaobeinia yuani sp.nov.from Gansu,are described.Detailed morphological descriptions and illustrations of these new species are given.A checklist of all known species in this tribe from China is provided and a key is proposed for all species of Tiaobeinia.
基金Project(41941018)supported by the National Natural Science Foundation of China for the Special Project FundingProject(22-JKCF-08)supported by the Study on in-situ Stress Database and 3D in-situ Stress Inversion Technology of Highway Tunnel in Shanxi Province,China+1 种基金Project(2022-JKKJ-6)supported by the Study on Disaster Mechanism and NPR Anchor Cable Prevention and Control of Coal Mining Caving Subsidence in Operating Tunnel in Mountainous Area,ChinaProject(BBJ2024032)supported by the Fundamental Research Funds for the Central Universities(PhD Top Innovative Talents Fund of CUMTB),China。
文摘A study was conducted to analyze the deformation mechanism of strongly weathered quartz schist in the Daliangshan Tunnel,located in the western Transverse Mountain area.A large deformation problem was experienced during the tunnel construction.To mitigate this problem,a support system was designed incorporating negative Poisson ratio(NPR)anchor cables with negative Poisson ratio effect.Physical model experiments,field experiments,and numerical simulation experiments were conducted to investigate the compensation mechanical behavior of NPR anchor cables.The large deformations of soft rocks in the Daliangshan Tunnel are caused by a high ground stress,a high degree of joint fracture development,and a high degree of surrounding rock fragmentation.A compensation mechanics support system combining long and short NPR anchor cables was suggested to provide sufficient counter-support force(approximately 350 kN)for the surrounding rock inside the tunnel.Comparing the NPR anchor cable support system with the original support system used in the Daliangshan tunnel showed that an NPR anchor cable support system,combining cables of 6.3 m and 10.3 m in length,effectively prevented convergence of surrounding rock deformation,and the integrated settlement convergence value remained below 300 mm.This study provides an effective scientific basis for resolving large deformation problems in deeply buried soft rocks in western transverse mountain areas.
