In today’s society,the need for talent training is of utmost importance due to rapid development.To achieve high-quality talent training,we need to focus on building a collaborative education mechanism.Practical teac...In today’s society,the need for talent training is of utmost importance due to rapid development.To achieve high-quality talent training,we need to focus on building a collaborative education mechanism.Practical teaching and the second classroom,which serve as important carriers of educational talents,must align their educational goals and complement each other.This article explores the collaborative education mechanism of the second classroom and practical teaching for the ideological and political courses in colleges and universities.It proposes reasonable construction measures to provide some guidelines for teaching work.展开更多
There was a mistake in affiliation a,the correct one should be“MOE Key Laboratory of Marine Genetics and Breeding and Sars-Fang Center,Ocean University of China,Qingdao 266003,China”as updated above;Affiliations c a...There was a mistake in affiliation a,the correct one should be“MOE Key Laboratory of Marine Genetics and Breeding and Sars-Fang Center,Ocean University of China,Qingdao 266003,China”as updated above;Affiliations c and d should be reversed:Affiliation c should be“Laboratory for Marine Fisheries Science and Food Production Processes,Pilot Qingdao National Laboratory for Marine Science and Technology,Qingdao 266237,China,”and the affiliation d should be“Laboratory of Tropical Marine Germplasm Resources and Breeding Engineering,Sanya Oceanographic Institution,Ocean University of China,Sanya 572000,China.”展开更多
The sorts and detection methods of environmental hormone were analyzed firstly,and then the effects of environmental hormone on organisms and humanity were discussed. Finally the control measures of environmental horm...The sorts and detection methods of environmental hormone were analyzed firstly,and then the effects of environmental hormone on organisms and humanity were discussed. Finally the control measures of environmental hormone pollution,such as reducing the use of goods and pesticide and the study of new substitutes and degradation technology are advanced.展开更多
Targeted genotyping is an extremely powerful approach for the detection of known genetic variations that are biologically or clinically important.However,for non-model organisms,large-scale target geno-typing in a cos...Targeted genotyping is an extremely powerful approach for the detection of known genetic variations that are biologically or clinically important.However,for non-model organisms,large-scale target geno-typing in a cost-effective manner remains a major challenge.To address this issue,we present an ultrahigh-multiplex,in-solution probe array-based high-throughput diverse marker genotyping(HD-Marker)approach that is capable of targeted genotyping of up to 86000 loci,with coverage of the whole gene repertoire,in what is a 27-fold and six-fold multiplex increase in comparison with the conventional Illumina GoldenGate and original HD-Marker assays,respectively.We perform extensive analyses of var-ious ultrahigh-multiplex levels of HD-Marker(30 k-plex,56 k-plex,and 86 k-plex)and show the power and excellent performance of the proposed method with an extremely high capture rate(about 96%)and genotyping accuracy(about 96%).With great advantages in terms of cost(as low as 0.0006 USD per geno-type)and high technical flexibility,HD-Marker is a highly efficient and powerful tool with broad appli-cation potential for genetic,ecological,and evolutionary studies of non-model organisms.展开更多
In the traditional reliability evaluation based on the Bayesian method,the failure probability of nodes is usually expressed by the average failure rate within a period of time.Aiming at the shortcomings of traditiona...In the traditional reliability evaluation based on the Bayesian method,the failure probability of nodes is usually expressed by the average failure rate within a period of time.Aiming at the shortcomings of traditional Bayesian network reliability evaluation methods,this paper proposes a Bayesian network reliability evaluation method considering dynamics and fuzziness.The fuzzy theory and the dynamic of component failure probability are introduced to construct the dynamic fuzzy set function.Based on the solving characteristics of the dynamic fuzzy set and Bayesian network,the fuzzy dynamic probability and fuzzy dynamic importance degree of the fault state of leaf nodes are solved.Finally,through the dynamic fuzzy reliability analysis of CNC machine tool hydraulic system balance circuit,the application of this method in system reliability evaluation is verified,which provides support for fault diagnosis of CNC machine tools.展开更多
Early Permian mafic-ultramafic complexes in eastern Xinjiang(新疆) are mainly dis-tributed in the Beishan(北山) area,Mid-Tianshan(天山) massif and Jueluotage(觉罗塔格) belt.Sys-tematic compositional mapping of olivine...Early Permian mafic-ultramafic complexes in eastern Xinjiang(新疆) are mainly dis-tributed in the Beishan(北山) area,Mid-Tianshan(天山) massif and Jueluotage(觉罗塔格) belt.Sys-tematic compositional mapping of olivines from these Early Permian mafic-ultramafic complexes demonstrates that an apparently spatial distribution and heterogeneous partial melting in the mantle source exists from the Beishan area,across the Mid-Tianshan massif,to the Jueluotage belt from the south to the north.This is probably consistent with the spatial evolutional differences and tectonic fea-tures of these three belts.The decreasing degree of partial melting,as revealed by decreasing Fo con-tents of olivines,from south to north and from east to west reflects the southward subduction of the Paleo-Asian Ocean and the south location of the indistinct mantle plume in the Permian.Simultane-ously,NiO and Fo-mapping in olivine also indicates that sulfide segregation before olivine crystalliza-tion played an important role in Ni-Cu mineralization in the mafic-ultramafic complexes.Olivines with the compositional range of Fo(77-86) and NiO(less than 0.22 wt.%) are more favorable for Ni-Cu sul-fide mineralization.展开更多
Oxide dispersion strengthened(ODS) steels can be used as the structural materials in the future fusion reactors and the fuel cladding materials in the advanced fission reactors. However, the weldability of ODS steels ...Oxide dispersion strengthened(ODS) steels can be used as the structural materials in the future fusion reactors and the fuel cladding materials in the advanced fission reactors. However, the weldability of ODS steels is a severe problem. In the present study, defect-free joints of the 15Cr-ODS ferritic steel were achieved by friction stir welding at different rotation speeds. The recrystallization, hardness and tensile properties are highly related with the rotation speed of the stir tool. The higher rotation speed results in coarser grains in the top SZ, while the grain size exhibits more complicated relation with the rotation speed in the SZ center. The joint welded at 250 rpm exhibits a maximum tensile strength of 974 MPa that reaches about 84% of that of the base metal.展开更多
Whether arc magmatism occurs above oceanic subduction zones is the forefront of studies on convergent plate margins.The most important petrologic issue related to the evolution of arc systems is the origin of arc magm...Whether arc magmatism occurs above oceanic subduction zones is the forefront of studies on convergent plate margins.The most important petrologic issue related to the evolution of arc systems is the origin of arc magmatism,among which arc basalts are the most important one because they provide insights into mantle enrichment mechanism and crust-mantle interaction at oceanic subduction zones.Fluids or melts released either by dehydration or by melting of subducting oceanic slab infiltrate and metasomatize the overlying mantle wedge at varying depth,leading to the formation of source regions of arc basalts.Such processes make most of arc basalts commonly enriched in large ion lithosphile elements and light rare earth elements,but depleted in high-field strength elements and heavy rare earth elements.Small amounts of arc basalts are characterized by relatively high Nb contents or by Nb enrichment.Rare basalts with compositions similar to ocean island basalts or mid-ocean ridge basalt also occur in arc systems.For these peculiar rocks,it remains debated whether their source is affected by subduction-related components.During their ascent and before their eruption,arc basaltic magmas are subjected to crystal fractionation,mixing and crustal contamination.In addition to the contribution of subducting slab components to the mantle source of arc basalts,the materials above the subducting slab at forearc depths would have been transported either by drag or by subduction erosion into the subarc mantle and into the source of arc magmas.Heats and materials brought by corner flows also play important roles in the generation of arc basalts.Despite the important progresses made in recent studies of arc basalts,further efforts are needed to investigate subarc mantle metasomatism,material recycling,the formation of arc magma sources,geodynamic mechanism in generating arc basalts,and their implicationd s for the initiation of plate tectonics on Earth.展开更多
Advances in flexible electronics are driving dielectric capacitors with high energy storage density toward flexibility and miniaturization.In the present work,an all-inorganic thin film dielectric capacitor with the c...Advances in flexible electronics are driving dielectric capacitors with high energy storage density toward flexibility and miniaturization.In the present work,an all-inorganic thin film dielectric capacitor with the coexistence of ferroelectric(FE)and antiferroelectric(AFE)phases based on Pb_(0.96)La_(0.04)(Zr_(0.95)Ti_(0.05))O_(3)(PLZT)was prepared on a 2D fluorophlogopite mica substrate via a simple one-step process.The flexible capacitor exhibits a high recoverable energy density(U_(rec))of z 44.2 J/cm^(3),a large electric breakdown strength(E BDS)of 3011 kV/cm,excellent frequency stability(500 Hz-20 kHz)and high thermal stability over 30-190℃.It also demonstrates an outstanding bending endurance,which can maintain a high energy storage performance under various bending radii(R=2-10 mm)or 103 repeated bends at 4 mm.The FE phase is stable near the film surface and the interface with the bottom electrode.The AFE phase with multi-domains has incommensurate modulation structures with super-periodicity of 6.5,6.9 and 5.2.It indicates that the PLZT/LNO/F-Mica capacitor has high potential for energy storage application and may provide great opportunities for exploring new energy storage materials.展开更多
To study the effect of tungsten, vanadium and tantalum on the microstructures in CLAM (China Low Activation Martensitic) steel after irradiation respectively, the microstructures of Fe-M (M= V ,W, Ta) model alloys wer...To study the effect of tungsten, vanadium and tantalum on the microstructures in CLAM (China Low Activation Martensitic) steel after irradiation respectively, the microstructures of Fe-M (M= V ,W, Ta) model alloys were investigated after implanted deuterium ions using an ion accelerator at 773 K. After implanted deuterium ion, TEM (Transmission Electron Microscope) observation and EDX (Energy Dispersive X-ray Spectrom) analysis have been carried out. The result showed that tiny voids were observed in all model alloys after implanted the same dose of deuterium ions. The swelling rate in FeTa alloy was the smallest among the three alloys. Unlike FeW and FeV alloys, there was the segregation in FeTa alloy under a fluence of 5×1017 D + /cm2 at 773 K. A theoretical analysis showed that the void growth in FeTa alloy slowed down due to tantalum segregation near voids. It indicates that tantalum plays an important role in the improved irradiation resistance of CLAM steel.展开更多
文摘In today’s society,the need for talent training is of utmost importance due to rapid development.To achieve high-quality talent training,we need to focus on building a collaborative education mechanism.Practical teaching and the second classroom,which serve as important carriers of educational talents,must align their educational goals and complement each other.This article explores the collaborative education mechanism of the second classroom and practical teaching for the ideological and political courses in colleges and universities.It proposes reasonable construction measures to provide some guidelines for teaching work.
文摘There was a mistake in affiliation a,the correct one should be“MOE Key Laboratory of Marine Genetics and Breeding and Sars-Fang Center,Ocean University of China,Qingdao 266003,China”as updated above;Affiliations c and d should be reversed:Affiliation c should be“Laboratory for Marine Fisheries Science and Food Production Processes,Pilot Qingdao National Laboratory for Marine Science and Technology,Qingdao 266237,China,”and the affiliation d should be“Laboratory of Tropical Marine Germplasm Resources and Breeding Engineering,Sanya Oceanographic Institution,Ocean University of China,Sanya 572000,China.”
文摘The sorts and detection methods of environmental hormone were analyzed firstly,and then the effects of environmental hormone on organisms and humanity were discussed. Finally the control measures of environmental hormone pollution,such as reducing the use of goods and pesticide and the study of new substitutes and degradation technology are advanced.
基金the grant support from National Natural Science Foundation of China (32130107, 32002446 and 32102778)Project of Sanya Yazhouwan Science and Technology City Management Foundation (SKJC-KJ-2019KY01)+1 种基金China Agriculture Research System of MOF and MARATaishan Scholar Project Fund of Shandong Province of China
文摘Targeted genotyping is an extremely powerful approach for the detection of known genetic variations that are biologically or clinically important.However,for non-model organisms,large-scale target geno-typing in a cost-effective manner remains a major challenge.To address this issue,we present an ultrahigh-multiplex,in-solution probe array-based high-throughput diverse marker genotyping(HD-Marker)approach that is capable of targeted genotyping of up to 86000 loci,with coverage of the whole gene repertoire,in what is a 27-fold and six-fold multiplex increase in comparison with the conventional Illumina GoldenGate and original HD-Marker assays,respectively.We perform extensive analyses of var-ious ultrahigh-multiplex levels of HD-Marker(30 k-plex,56 k-plex,and 86 k-plex)and show the power and excellent performance of the proposed method with an extremely high capture rate(about 96%)and genotyping accuracy(about 96%).With great advantages in terms of cost(as low as 0.0006 USD per geno-type)and high technical flexibility,HD-Marker is a highly efficient and powerful tool with broad appli-cation potential for genetic,ecological,and evolutionary studies of non-model organisms.
基金This research was supported by the Sichuan Science and Technology Depart-ment under Contract Nos.2019YJ0396 and 2018JY0516the National Natural Science Foundation of China under the Contract No.51705041.
文摘In the traditional reliability evaluation based on the Bayesian method,the failure probability of nodes is usually expressed by the average failure rate within a period of time.Aiming at the shortcomings of traditional Bayesian network reliability evaluation methods,this paper proposes a Bayesian network reliability evaluation method considering dynamics and fuzziness.The fuzzy theory and the dynamic of component failure probability are introduced to construct the dynamic fuzzy set function.Based on the solving characteristics of the dynamic fuzzy set and Bayesian network,the fuzzy dynamic probability and fuzzy dynamic importance degree of the fault state of leaf nodes are solved.Finally,through the dynamic fuzzy reliability analysis of CNC machine tool hydraulic system balance circuit,the application of this method in system reliability evaluation is verified,which provides support for fault diagnosis of CNC machine tools.
基金supported by the National Natural Science Foundation of China (Nos. 41030424,41173011)the Knowledge Innovation Program of the Chinese Academy of Sciences (No. KZCX2-YW-107)the China Postdoctoral Science Foundation to Benxun Su
文摘Early Permian mafic-ultramafic complexes in eastern Xinjiang(新疆) are mainly dis-tributed in the Beishan(北山) area,Mid-Tianshan(天山) massif and Jueluotage(觉罗塔格) belt.Sys-tematic compositional mapping of olivines from these Early Permian mafic-ultramafic complexes demonstrates that an apparently spatial distribution and heterogeneous partial melting in the mantle source exists from the Beishan area,across the Mid-Tianshan massif,to the Jueluotage belt from the south to the north.This is probably consistent with the spatial evolutional differences and tectonic fea-tures of these three belts.The decreasing degree of partial melting,as revealed by decreasing Fo con-tents of olivines,from south to north and from east to west reflects the southward subduction of the Paleo-Asian Ocean and the south location of the indistinct mantle plume in the Permian.Simultane-ously,NiO and Fo-mapping in olivine also indicates that sulfide segregation before olivine crystalliza-tion played an important role in Ni-Cu mineralization in the mafic-ultramafic complexes.Olivines with the compositional range of Fo(77-86) and NiO(less than 0.22 wt.%) are more favorable for Ni-Cu sul-fide mineralization.
基金support of the National Magnet Confinement Fusion Energy Research Program(Grand No.2013GB108001)
文摘Oxide dispersion strengthened(ODS) steels can be used as the structural materials in the future fusion reactors and the fuel cladding materials in the advanced fission reactors. However, the weldability of ODS steels is a severe problem. In the present study, defect-free joints of the 15Cr-ODS ferritic steel were achieved by friction stir welding at different rotation speeds. The recrystallization, hardness and tensile properties are highly related with the rotation speed of the stir tool. The higher rotation speed results in coarser grains in the top SZ, while the grain size exhibits more complicated relation with the rotation speed in the SZ center. The joint welded at 250 rpm exhibits a maximum tensile strength of 974 MPa that reaches about 84% of that of the base metal.
基金State Ocean Bureau International Collaboration Program(Grant No.GASI-GEOGE-02)the National Natural Science Foundation of China(Grant Nos.91855215,41630208)CAS Strategy Program B(Grant No.XDB18000000).
文摘Whether arc magmatism occurs above oceanic subduction zones is the forefront of studies on convergent plate margins.The most important petrologic issue related to the evolution of arc systems is the origin of arc magmatism,among which arc basalts are the most important one because they provide insights into mantle enrichment mechanism and crust-mantle interaction at oceanic subduction zones.Fluids or melts released either by dehydration or by melting of subducting oceanic slab infiltrate and metasomatize the overlying mantle wedge at varying depth,leading to the formation of source regions of arc basalts.Such processes make most of arc basalts commonly enriched in large ion lithosphile elements and light rare earth elements,but depleted in high-field strength elements and heavy rare earth elements.Small amounts of arc basalts are characterized by relatively high Nb contents or by Nb enrichment.Rare basalts with compositions similar to ocean island basalts or mid-ocean ridge basalt also occur in arc systems.For these peculiar rocks,it remains debated whether their source is affected by subduction-related components.During their ascent and before their eruption,arc basaltic magmas are subjected to crystal fractionation,mixing and crustal contamination.In addition to the contribution of subducting slab components to the mantle source of arc basalts,the materials above the subducting slab at forearc depths would have been transported either by drag or by subduction erosion into the subarc mantle and into the source of arc magmas.Heats and materials brought by corner flows also play important roles in the generation of arc basalts.Despite the important progresses made in recent studies of arc basalts,further efforts are needed to investigate subarc mantle metasomatism,material recycling,the formation of arc magma sources,geodynamic mechanism in generating arc basalts,and their implicationd s for the initiation of plate tectonics on Earth.
基金This work was supported by the National Natural Science Foundation of China(Grant Nos.51971030 and 11775018)Beijing Municipal Natural Science Foundation 2202032.
文摘Advances in flexible electronics are driving dielectric capacitors with high energy storage density toward flexibility and miniaturization.In the present work,an all-inorganic thin film dielectric capacitor with the coexistence of ferroelectric(FE)and antiferroelectric(AFE)phases based on Pb_(0.96)La_(0.04)(Zr_(0.95)Ti_(0.05))O_(3)(PLZT)was prepared on a 2D fluorophlogopite mica substrate via a simple one-step process.The flexible capacitor exhibits a high recoverable energy density(U_(rec))of z 44.2 J/cm^(3),a large electric breakdown strength(E BDS)of 3011 kV/cm,excellent frequency stability(500 Hz-20 kHz)and high thermal stability over 30-190℃.It also demonstrates an outstanding bending endurance,which can maintain a high energy storage performance under various bending radii(R=2-10 mm)or 103 repeated bends at 4 mm.The FE phase is stable near the film surface and the interface with the bottom electrode.The AFE phase with multi-domains has incommensurate modulation structures with super-periodicity of 6.5,6.9 and 5.2.It indicates that the PLZT/LNO/F-Mica capacitor has high potential for energy storage application and may provide great opportunities for exploring new energy storage materials.
基金financially supported by the National Natural Science Foundation of China (No. 50971030)the National Basic Research Program of China(Nos. 2009GB109004 and 2011GB108002)the Core University Program of Japan Society for the Promotion of Science
文摘To study the effect of tungsten, vanadium and tantalum on the microstructures in CLAM (China Low Activation Martensitic) steel after irradiation respectively, the microstructures of Fe-M (M= V ,W, Ta) model alloys were investigated after implanted deuterium ions using an ion accelerator at 773 K. After implanted deuterium ion, TEM (Transmission Electron Microscope) observation and EDX (Energy Dispersive X-ray Spectrom) analysis have been carried out. The result showed that tiny voids were observed in all model alloys after implanted the same dose of deuterium ions. The swelling rate in FeTa alloy was the smallest among the three alloys. Unlike FeW and FeV alloys, there was the segregation in FeTa alloy under a fluence of 5×1017 D + /cm2 at 773 K. A theoretical analysis showed that the void growth in FeTa alloy slowed down due to tantalum segregation near voids. It indicates that tantalum plays an important role in the improved irradiation resistance of CLAM steel.
