This paper presents a deep learning-based topology optimization method for the joint design of material layout and fiber orientation in continuous fiber-reinforced composite structure(CFRCS).The proposed method mainly...This paper presents a deep learning-based topology optimization method for the joint design of material layout and fiber orientation in continuous fiber-reinforced composite structure(CFRCS).The proposed method mainly includes three steps:(1)a ResUNet-involved generative and adversarial network(ResUNet-GAN)is developed to establish the end-to-end mapping from structural design parameters to fiber-reinforced composite optimized structure,and a fiber orientation chromatogram is presented to represent continuous fiber angles;(2)to avoid the local optimum problem,the independent continuous mapping method(ICM method)considering the improved principal stress orientation interpolated continuous fiber angle optimization(PSO-CFAO)strategy is utilized to construct CFRCS topology optimization dataset;(3)the well-trained ResUNet-GAN is deployed to design the optimal structural material distribution together with the corresponding continuous fiber orientations.Numerical simulations for benchmark structure verify that the proposed method greatly improves the design efficiency of CFRCS along with high design accuracy.Furthermore,the CFRCS topology configuration designed by ResUNet-GAN is fabricated by additive manufacturing.Compression experiments of the specimens show that both the stiffness structure and peak load of the CFRCS topology configuration designed by the proposed method have significantly enhanced.The proposed deep learning-based topology optimization method will provide great flexibility in CFRCS for engineering applications.展开更多
Advancements in orbital angular momentum (OAM) mode-multiplexing communication networks requiretunable mode filters for selective channel demultiplexing and downloading. In this study, we propose a spatialdepth-depend...Advancements in orbital angular momentum (OAM) mode-multiplexing communication networks requiretunable mode filters for selective channel demultiplexing and downloading. In this study, we propose a spatialdepth-dependent mode transformation strategy for the tunable filtering of OAM modes. By integrating the spiralphase and lens phase modulations, we achieved mode conversions that varied with the transmission depth,enabling selective demultiplexing in predetermined axial planes. This approach facilitates tunable mode filteringby adjusting spatial depths. As a proof of concept, we fabricated a mode filter using two-photon polymerizationlithography (TPL) technology, successfully filtering five OAM modes with mode crosstalk below −10.9 dB.Additionally, the filter was applied in a mode-multiplexing communication link, achieving tunable demultiplexingof five mode channels with bit error rates below 10^(−6). These results highlight the efficacy and flexibilityof our strategy for OAM mode filtering and offer promising insights for the development of mode-multiplexingcommunication networks and channel interconnections.展开更多
Cylindrical vector beams(CVBs)hold significant promise in mode division multiplexing communication owing to their inherent vector mode orthogonality.However,existing studies for facilitating CVB channel processing are...Cylindrical vector beams(CVBs)hold significant promise in mode division multiplexing communication owing to their inherent vector mode orthogonality.However,existing studies for facilitating CVB channel processing are confined to mode shift conversions due to their reliance on spin-dependent helical modulations,overlooking the pursuit of mode multiplication conversion.This challenge lies in the multiplicative operation upon inhomogeneous vector mode manipulation,which is expected to advance versatile CVB channel switching and routing.Here,we tackle this gap by introducing a raytracing control strategy that conformally maps the light rays of CVB from the whole annulus distribution to an annular sector counterpart.Incorporated with the multifold conformal annulus-sector mappings and polarization-insensitive phase modulations,this approach facilitates the parallel transformation of input CVB into multiple complementary components,enabling the mode multiplication conversion with protected vector structure.Serving as a demonstration,we experimentally implemented the multiplicative operation of four CVB modes with the multiplier factors of N=+2 and N=−3,achieving the converted mode purities over 94.24%and 88.37%.Subsequently,200 Gbit/s quadrature phase shift keying signals were successfully transmitted upon multiplicative switching of four CVB channels,with the bit-error-rate approaching 1×10^(−6).These results underscore our strategy’s efficacy in CVB mode multiplication,which may open promising prospects for its advanced applications.展开更多
Anodic film formed on aluminum-lithium alloy AA2099-T83 is post-treated in various lithium oxalate(Li_(2)C_(2)O_(4))solutions to enhance its corrosion resistance.The anodic film can be rapidly sealed near room tempera...Anodic film formed on aluminum-lithium alloy AA2099-T83 is post-treated in various lithium oxalate(Li_(2)C_(2)O_(4))solutions to enhance its corrosion resistance.The anodic film can be rapidly sealed near room temperature and there is an interaction between the sealing temperature and salt concentration.Particularly,the alloy specimens treated in 0.03 mol/L Li_(2)C_(2)O_(4) solution at 40 or 50°C for 30 min did not show any visible corrosion pits even after 1000 h of neutral salt spray tests.The sealed anodic film typically shows lamellar surface features and a dense top layer of a few hundred nanometers thickness.The sealing products are mainly composed of boehmite,layered double hydroxides(LDHs)and amorphous hydroxides.The high corrosion resistance of the treated alloy is ascribed to the formation of boehmite and LDHs(or amorphous hydroxides)in the anodic film and the selfhealing characteristic of the coating system.The present work suggests that it is possible to achieve high corrosion resistance for anodized aluminum-lithium alloys by post-treatment in appropriate lithium oxalate solutions near room temperature.展开更多
The emergence of cascaded metasurface holography has opened up a promising avenue for realizing high-capacity optical data storage and security information encryption.However,in the majority of existing cascaded confi...The emergence of cascaded metasurface holography has opened up a promising avenue for realizing high-capacity optical data storage and security information encryption.However,in the majority of existing cascaded configurations,the inherent cascade-phase overlap prevents the retrieval of additional holographic information from each single-layer metasurface unless these metasurfaces are physically separated.To overcome this limitation,we propose a controllable cascade-phase modulation solution for enabling flexible switching between single-layer and cascaded holograms that utilizes helicitydecoupled Ge_(2)Sb_(2)Te_(5)(GST)metasurfaces.By harnessing the prominent optical-phase response contrast in GST transition,we show that phase-type holographic profiles tailored using GST nanopillars can be arbitrarily retrieved in their amorphous state while completely hidden in the crystalline state;this allows the active separation and combination of bilayer phases through controlling the amorphous-crystalline state transition of GST.Additionally,combined with the helicity-decoupled phase modulation mechanism,the optical dual-helicity channels offer polarization control operation for cascade-phase function switching.As a proof-of-concept,the designed GST metasurfaces are used to successfully reconstruct four single-layer and two cascaded holographic images separately through a synergistic control of the GST transition and by leveraging the helicity of the incident light.This feature also results in a reliable holographic encryption strategy for transmitting ciphered information.The proposed technology not only overcomes the physical constraints of multilayer phase overlap but is also compatible with existing cascade-related holographic multiplexing methodologies,which may promote the advanced explorations of optical multilevel modulation,multidimensional displays,and high-density optical storage.展开更多
The progress of on-chip optical communication relies on integrated multi-dimensional mode(de)multiplexers to enhance communication capacity and establish comprehensive networks.However,existing multi-dimensional(de)mu...The progress of on-chip optical communication relies on integrated multi-dimensional mode(de)multiplexers to enhance communication capacity and establish comprehensive networks.However,existing multi-dimensional(de)multiplexers,involving modes and wavelengths,face limitations due to their reliance on single-directional total internal reflection and multi-level mode conversion based on directional coupling principles.These constraints restrict their potential for full-duplex functionality and highly integrated communication.We solve these problems by introducing a photonic-like crystal-connected bidirectional micro-ring resonator array(PBMRA)and apply it to duplex mode-wavelength multiplexing communication.The directional independence of total internal reflection and the cumulative effect of the subwavelength-scale pillar within the single-level photonic crystal enable bidirectional mode and wavelength multiplexed signals to transmit among multi-pair nodes without interference,improving on-chip integration in single-level mode conversion.As a proof of concept,we fabricated a nine-channel bidirectional multi-dimensional(de)multiplexer,featuring three wavelengths and three TE modes,compactly housed within a footprint of 80μm×80μm,which efficiently transmits QPSK-OFDM signals at a rate of 216 Gbit/s,achieving a bit error rate lower than 10^(-4).Leveraging the co-ring transmission characteristic and the orthogonality of the mode-wavelength channel,this(de)multiplexer also enables a doubling of communication capacity using two physical transmission channels.展开更多
Metasurfaces composed of spatially arranged ultrathin subwavelength elements are promising photonic devices for manipulating optical wavefronts,with potential applications in holography,metalens,and multiplexing commu...Metasurfaces composed of spatially arranged ultrathin subwavelength elements are promising photonic devices for manipulating optical wavefronts,with potential applications in holography,metalens,and multiplexing communications.Finding microstructures that meet light modulation requirements is always a challenge in designing metasurfaces,where parameter sweep,gradient-based inverse design,and topology optimization are the most commonly used design methods in which the massive electromagnetic iterations require the design computational cost and are sometimes prohibitive.Herein,we propose a fast inverse design method that combines a physicsbased neural network surrogate model(NNSM)with an optimization algorithm.The NNSM,which can generate an accurate electromagnetic response from the geometric topologies of the meta-atoms,is constructed for electromagnetic iterations,and the optimization algorithm is used to search for the on-demand meta-atoms from the phase library established by the NNSM to realize an inverse design.This method addresses two important problems in metasurface design:fast and accurate electromagnetic wave phase prediction and inverse design through a single phase-shift value.As a proof-of-concept,we designed an orbital angular momentum(de)multiplexer based on a phase-type metasurface,and 200 Gbit/s quadrature-phase shift-keying signals were successfully transmitted with a bit error rate approaching 1.67×10^(-6).Because the design is mainly based on an optimization algorithm,it can address the“one-to-many”inverse problem in other micro/nano devices such as integrated photonic circuits,waveguides,and nano-antennas.展开更多
Plague,caused by Yersinia pestis,is a natural focus infectious disease.In China,plague is classified as category A,with the highest risk and hazard among the infectious diseases.Qinghai used to be considered as one of...Plague,caused by Yersinia pestis,is a natural focus infectious disease.In China,plague is classified as category A,with the highest risk and hazard among the infectious diseases.Qinghai used to be considered as one of the most serious areas of plague in China.In recent years,thank to the measures in eight aspects summarized as the“Qinghai model”which were adopted to prevent and control the human plague in Qinghai,Qinghai has not experienced any plague case reported for eight years.In early 2020,coronavirus disease 2019(COVID-19)outbroke in China.The Qinghai model on plague was employed to deal with the COVID-19 emergency in Qinghai Province.The Qinghai Center for Disease Control and Prevention(Qinghai CDC)and hospitals,along with the departments of public security,animal husbandry and other departments,quickly tracked and treated the patients with severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)and started surveillance programs on close contacts timely.At present,the cure rate of patients has reached 100%,and close contacts have been effectively quarantined and tested to avoid the spread of COVID-19.The findings from the study suggest that the prevention and control measures undertaken in Qinghai Province might be effective in dealing with the category A infectious diseases such as COVID-19 and other diseases.展开更多
Genomoviridae is a virus family belonging to circular replication associated protein encoding ssDNA(CRESS-DNA)viruses,which have diverse genomic architecture and are widely distributed among different ecosystems.In th...Genomoviridae is a virus family belonging to circular replication associated protein encoding ssDNA(CRESS-DNA)viruses,which have diverse genomic architecture and are widely distributed among different ecosystems.In this study,we characterized 39 novel genomovirus genomes including 3 from wild egrets,9 from wild cranes,as well as 27 from wild finches in three different types of cloacal swabs of wild bird sampled in the station of Xinqing bird ringing,Maoershan Nature Reserve in Heilongjiang Province,Changbai Mountain in Jilin Province,and Hangzhou Wetland Park in Zhejiang Province,China.Here,using a Rep sequence phylogeny-based analysis,we divided the 39 genomoviruses into 8 genera within the family Genomoviridae,including Gemycircularvirus(n=20),Gemykibivirus(n=3),Gemygorvirus(n=2),Gemyvongvirus(n=2),Gemykolovirus(n=3),Gemykrogvirus(n=6),Gemytondvirus(n=1),Gemyduguivirus(n=1)and one unclassified genomovirus.The 39 genomovirus genomes belong to 36 species(27 of which are new)based on the currently accepted genomovirus pairwise nucleotide sequence identity species demarcation threshold of 78%.Overall,the research enriches our knowledge of CRESS-DNA viral diversity in China and emphasizes the prevalence of genomoviruses in nature.展开更多
基金supported by the National Natural Science Foundation of China(Grant No.11872080)Beijing Natural Science Foundation(Grant No.3192005).
文摘This paper presents a deep learning-based topology optimization method for the joint design of material layout and fiber orientation in continuous fiber-reinforced composite structure(CFRCS).The proposed method mainly includes three steps:(1)a ResUNet-involved generative and adversarial network(ResUNet-GAN)is developed to establish the end-to-end mapping from structural design parameters to fiber-reinforced composite optimized structure,and a fiber orientation chromatogram is presented to represent continuous fiber angles;(2)to avoid the local optimum problem,the independent continuous mapping method(ICM method)considering the improved principal stress orientation interpolated continuous fiber angle optimization(PSO-CFAO)strategy is utilized to construct CFRCS topology optimization dataset;(3)the well-trained ResUNet-GAN is deployed to design the optimal structural material distribution together with the corresponding continuous fiber orientations.Numerical simulations for benchmark structure verify that the proposed method greatly improves the design efficiency of CFRCS along with high design accuracy.Furthermore,the CFRCS topology configuration designed by ResUNet-GAN is fabricated by additive manufacturing.Compression experiments of the specimens show that both the stiffness structure and peak load of the CFRCS topology configuration designed by the proposed method have significantly enhanced.The proposed deep learning-based topology optimization method will provide great flexibility in CFRCS for engineering applications.
文摘Advancements in orbital angular momentum (OAM) mode-multiplexing communication networks requiretunable mode filters for selective channel demultiplexing and downloading. In this study, we propose a spatialdepth-dependent mode transformation strategy for the tunable filtering of OAM modes. By integrating the spiralphase and lens phase modulations, we achieved mode conversions that varied with the transmission depth,enabling selective demultiplexing in predetermined axial planes. This approach facilitates tunable mode filteringby adjusting spatial depths. As a proof of concept, we fabricated a mode filter using two-photon polymerizationlithography (TPL) technology, successfully filtering five OAM modes with mode crosstalk below −10.9 dB.Additionally, the filter was applied in a mode-multiplexing communication link, achieving tunable demultiplexingof five mode channels with bit error rates below 10^(−6). These results highlight the efficacy and flexibilityof our strategy for OAM mode filtering and offer promising insights for the development of mode-multiplexingcommunication networks and channel interconnections.
基金supported by the National Natural Science Foundation of China(Grant No.62271322)the Guangdong Basic and Applied Basic Research Foundation(Grant No.2023A1515030152)+1 种基金the Shenzhen Science and Technology Program(Grant No.JCYJ20210324095610027)the Natural Science Foundation of Top Talent of SZTU(Grant No.GDRC202204)。
文摘Cylindrical vector beams(CVBs)hold significant promise in mode division multiplexing communication owing to their inherent vector mode orthogonality.However,existing studies for facilitating CVB channel processing are confined to mode shift conversions due to their reliance on spin-dependent helical modulations,overlooking the pursuit of mode multiplication conversion.This challenge lies in the multiplicative operation upon inhomogeneous vector mode manipulation,which is expected to advance versatile CVB channel switching and routing.Here,we tackle this gap by introducing a raytracing control strategy that conformally maps the light rays of CVB from the whole annulus distribution to an annular sector counterpart.Incorporated with the multifold conformal annulus-sector mappings and polarization-insensitive phase modulations,this approach facilitates the parallel transformation of input CVB into multiple complementary components,enabling the mode multiplication conversion with protected vector structure.Serving as a demonstration,we experimentally implemented the multiplicative operation of four CVB modes with the multiplier factors of N=+2 and N=−3,achieving the converted mode purities over 94.24%and 88.37%.Subsequently,200 Gbit/s quadrature phase shift keying signals were successfully transmitted upon multiplicative switching of four CVB channels,with the bit-error-rate approaching 1×10^(−6).These results underscore our strategy’s efficacy in CVB mode multiplication,which may open promising prospects for its advanced applications.
基金financially supported by the Chongqing Natural Science Foundation(CSTB2022NSCQ-MSX0326)the Defense Technology 173 Plan(2021-JCJQ-JJ-0116)+1 种基金Chongqing Talent Plan:Leading Talents in Innovation and Entrepreneurship(CQYC201903051)University Innovation Research Group of Chongqing(CXQT20023)
文摘Anodic film formed on aluminum-lithium alloy AA2099-T83 is post-treated in various lithium oxalate(Li_(2)C_(2)O_(4))solutions to enhance its corrosion resistance.The anodic film can be rapidly sealed near room temperature and there is an interaction between the sealing temperature and salt concentration.Particularly,the alloy specimens treated in 0.03 mol/L Li_(2)C_(2)O_(4) solution at 40 or 50°C for 30 min did not show any visible corrosion pits even after 1000 h of neutral salt spray tests.The sealed anodic film typically shows lamellar surface features and a dense top layer of a few hundred nanometers thickness.The sealing products are mainly composed of boehmite,layered double hydroxides(LDHs)and amorphous hydroxides.The high corrosion resistance of the treated alloy is ascribed to the formation of boehmite and LDHs(or amorphous hydroxides)in the anodic film and the selfhealing characteristic of the coating system.The present work suggests that it is possible to achieve high corrosion resistance for anodized aluminum-lithium alloys by post-treatment in appropriate lithium oxalate solutions near room temperature.
基金supported by the National Natural Science Foundation of China(Grant No.62271322)the Guangdong Basic and Applied Basic Research Foundation(Grant No.2023A1515030152)+2 种基金the Science and Technology Project of Shenzhen(Grant No.ZDSYS201707271014468)the Shenzhen Science and Technology Program(Grant No.JCYJ20240813143018024)the Natural Science Foundation of Top Talent of SZTU(Grant No.GDRC202204)。
文摘The emergence of cascaded metasurface holography has opened up a promising avenue for realizing high-capacity optical data storage and security information encryption.However,in the majority of existing cascaded configurations,the inherent cascade-phase overlap prevents the retrieval of additional holographic information from each single-layer metasurface unless these metasurfaces are physically separated.To overcome this limitation,we propose a controllable cascade-phase modulation solution for enabling flexible switching between single-layer and cascaded holograms that utilizes helicitydecoupled Ge_(2)Sb_(2)Te_(5)(GST)metasurfaces.By harnessing the prominent optical-phase response contrast in GST transition,we show that phase-type holographic profiles tailored using GST nanopillars can be arbitrarily retrieved in their amorphous state while completely hidden in the crystalline state;this allows the active separation and combination of bilayer phases through controlling the amorphous-crystalline state transition of GST.Additionally,combined with the helicity-decoupled phase modulation mechanism,the optical dual-helicity channels offer polarization control operation for cascade-phase function switching.As a proof-of-concept,the designed GST metasurfaces are used to successfully reconstruct four single-layer and two cascaded holographic images separately through a synergistic control of the GST transition and by leveraging the helicity of the incident light.This feature also results in a reliable holographic encryption strategy for transmitting ciphered information.The proposed technology not only overcomes the physical constraints of multilayer phase overlap but is also compatible with existing cascade-related holographic multiplexing methodologies,which may promote the advanced explorations of optical multilevel modulation,multidimensional displays,and high-density optical storage.
基金Natural Science Foundation of Top Talent of SZTU(GDRC202204)Shenzhen Science and Technology Program(JCYJ20210324095610027)+1 种基金Guangdong Basic and Applied Basic Research Foundation(2023A1515030152)National Natural Science Foundation of China(62271322)。
文摘The progress of on-chip optical communication relies on integrated multi-dimensional mode(de)multiplexers to enhance communication capacity and establish comprehensive networks.However,existing multi-dimensional(de)multiplexers,involving modes and wavelengths,face limitations due to their reliance on single-directional total internal reflection and multi-level mode conversion based on directional coupling principles.These constraints restrict their potential for full-duplex functionality and highly integrated communication.We solve these problems by introducing a photonic-like crystal-connected bidirectional micro-ring resonator array(PBMRA)and apply it to duplex mode-wavelength multiplexing communication.The directional independence of total internal reflection and the cumulative effect of the subwavelength-scale pillar within the single-level photonic crystal enable bidirectional mode and wavelength multiplexed signals to transmit among multi-pair nodes without interference,improving on-chip integration in single-level mode conversion.As a proof of concept,we fabricated a nine-channel bidirectional multi-dimensional(de)multiplexer,featuring three wavelengths and three TE modes,compactly housed within a footprint of 80μm×80μm,which efficiently transmits QPSK-OFDM signals at a rate of 216 Gbit/s,achieving a bit error rate lower than 10^(-4).Leveraging the co-ring transmission characteristic and the orthogonality of the mode-wavelength channel,this(de)multiplexer also enables a doubling of communication capacity using two physical transmission channels.
基金Shenzhen Peacock Plan(20180521645C,20180921273B)China Postdoctoral Science Foundation(2020M682867)+5 种基金Shenzhen Excellent Scientific and Technological Innovative Talent Training Program(RCBS20200714114818094)Shenzhen Universities Stabilization Support Program(SZWD2021013)Science and Technology Project of Shenzhen(GJHZ20180928160407303)Shenzhen Fundamental Research Program(JCYJ20210324095611030,JCYJ20210324095610027)Basic and Applied Basic Research Foundation of Guangdong Province(2019A1515111153,2020A1515011392,2020A1515110572,2021A1515011762)National Natural Science Foundation of China(12047539,61805149,62101334)。
文摘Metasurfaces composed of spatially arranged ultrathin subwavelength elements are promising photonic devices for manipulating optical wavefronts,with potential applications in holography,metalens,and multiplexing communications.Finding microstructures that meet light modulation requirements is always a challenge in designing metasurfaces,where parameter sweep,gradient-based inverse design,and topology optimization are the most commonly used design methods in which the massive electromagnetic iterations require the design computational cost and are sometimes prohibitive.Herein,we propose a fast inverse design method that combines a physicsbased neural network surrogate model(NNSM)with an optimization algorithm.The NNSM,which can generate an accurate electromagnetic response from the geometric topologies of the meta-atoms,is constructed for electromagnetic iterations,and the optimization algorithm is used to search for the on-demand meta-atoms from the phase library established by the NNSM to realize an inverse design.This method addresses two important problems in metasurface design:fast and accurate electromagnetic wave phase prediction and inverse design through a single phase-shift value.As a proof-of-concept,we designed an orbital angular momentum(de)multiplexer based on a phase-type metasurface,and 200 Gbit/s quadrature-phase shift-keying signals were successfully transmitted with a bit error rate approaching 1.67×10^(-6).Because the design is mainly based on an optimization algorithm,it can address the“one-to-many”inverse problem in other micro/nano devices such as integrated photonic circuits,waveguides,and nano-antennas.
基金funded by the Key Laboratory of National Health Com-mission Project(2019PT310004)the Key Laboratory for Plague Pre-vention and Control of Qinghai Province(2020-ZJ-Y23).
文摘Plague,caused by Yersinia pestis,is a natural focus infectious disease.In China,plague is classified as category A,with the highest risk and hazard among the infectious diseases.Qinghai used to be considered as one of the most serious areas of plague in China.In recent years,thank to the measures in eight aspects summarized as the“Qinghai model”which were adopted to prevent and control the human plague in Qinghai,Qinghai has not experienced any plague case reported for eight years.In early 2020,coronavirus disease 2019(COVID-19)outbroke in China.The Qinghai model on plague was employed to deal with the COVID-19 emergency in Qinghai Province.The Qinghai Center for Disease Control and Prevention(Qinghai CDC)and hospitals,along with the departments of public security,animal husbandry and other departments,quickly tracked and treated the patients with severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)and started surveillance programs on close contacts timely.At present,the cure rate of patients has reached 100%,and close contacts have been effectively quarantined and tested to avoid the spread of COVID-19.The findings from the study suggest that the prevention and control measures undertaken in Qinghai Province might be effective in dealing with the category A infectious diseases such as COVID-19 and other diseases.
基金supported by National Key Research and Development Programs of China[No.2017YFC1200201]Key research plan of Xuzhou science and Technology Bureau[No.KC18183]Postdoctoral program of Jiangsu Province[No.2016-259].
文摘Genomoviridae is a virus family belonging to circular replication associated protein encoding ssDNA(CRESS-DNA)viruses,which have diverse genomic architecture and are widely distributed among different ecosystems.In this study,we characterized 39 novel genomovirus genomes including 3 from wild egrets,9 from wild cranes,as well as 27 from wild finches in three different types of cloacal swabs of wild bird sampled in the station of Xinqing bird ringing,Maoershan Nature Reserve in Heilongjiang Province,Changbai Mountain in Jilin Province,and Hangzhou Wetland Park in Zhejiang Province,China.Here,using a Rep sequence phylogeny-based analysis,we divided the 39 genomoviruses into 8 genera within the family Genomoviridae,including Gemycircularvirus(n=20),Gemykibivirus(n=3),Gemygorvirus(n=2),Gemyvongvirus(n=2),Gemykolovirus(n=3),Gemykrogvirus(n=6),Gemytondvirus(n=1),Gemyduguivirus(n=1)and one unclassified genomovirus.The 39 genomovirus genomes belong to 36 species(27 of which are new)based on the currently accepted genomovirus pairwise nucleotide sequence identity species demarcation threshold of 78%.Overall,the research enriches our knowledge of CRESS-DNA viral diversity in China and emphasizes the prevalence of genomoviruses in nature.
