Inspired by the successful synthesis of h Hv-graphane[Nano Lett.15903(2015)],a new two-dimensional(2D)Janus material Cu-graphane is proposed based on the first-principles calculations.Without the spin-orbit coupling(S...Inspired by the successful synthesis of h Hv-graphane[Nano Lett.15903(2015)],a new two-dimensional(2D)Janus material Cu-graphane is proposed based on the first-principles calculations.Without the spin-orbit coupling(SOC)effect,Cu-graphane is a Dirac semimetal with a highly anisotropic Dirac cone,whose Fermi velocity ranges from 0.12×10^(5)m/s to2.9×10^(5)m/s.The Dirac cone near the Fermi level can be well described with an extended 2D Dirac model Hamiltonian.In the presence of the SOC effect,band splitting is observed around the Fermi level,and a large intrinsic spin Hall conductivity(ISHC)with a maximum value of 346(h/e)S/cm is predicted.Moreover,the spin Hall transport can be regulated by slightly adjusting the Fermi energy,e.g.,grid voltage or chemical doping.Our work not only proposes a new 2D Janus material with a highly anisotropic Dirac cone and a large ISHC,but also reveals that a large ISHC may exist in some Dirac systems.展开更多
现有的生物质成型机多采用开式压缩成型结构,存在能耗高、生产率低和对物料粒度要求严格等问题。文章以降低能耗、提高生产率和增强物料适应性为目标,设计了一种新型对辊式生物质压块机,该压块机通过对辊上相向旋转的椭圆形模具型腔,实...现有的生物质成型机多采用开式压缩成型结构,存在能耗高、生产率低和对物料粒度要求严格等问题。文章以降低能耗、提高生产率和增强物料适应性为目标,设计了一种新型对辊式生物质压块机,该压块机通过对辊上相向旋转的椭圆形模具型腔,实现物料的闭式压缩成型。整机采用分体机架三层式结构,通过一级螺旋压缩机、二级增压装置、三级对辊挤压装置组成的组合增压成型系统,可实现对物料的逐级压缩成型。通过脱模力计算,设计了可以提高对辊有效工作面积的椭圆形成型辊模具和增压辊人字形模具,并进行了受力分析。样机试验结果表明,样机的生产率为1 032.6 kg/h,能耗为38.8 k W·h/t、成型率为91.5%,各项指标均达到了农业行业标准(NT/T1882-2010)的要求。展开更多
The stability analysis of the solution mappings for vector equilibrium problems is an important topic in optimization theory and its applications. In this paper, we focus on the continuity of the solution mapping for ...The stability analysis of the solution mappings for vector equilibrium problems is an important topic in optimization theory and its applications. In this paper, we focus on the continuity of the solution mapping for a parametric generalized strong vector equilibrium problem. By virtue of a nonlinear scalarization technique, a new density result of the solution mapping is obtained. Based on the density result, we give sufficient conditions for the lower semicontinuity and the Hausdorff upper semicontinuity of the solution mapping to the parametric generalized strong vector equilibrium problem. In addition, some examples were given to illustrate that our results improve ones in the literature.展开更多
基金supported by the National Key R&D Program of China (2019YFA0308500 and 2022YFA1204103)the National Natural Science Foundation of China (52250402, 52201231, 22372047, and 61888102)+1 种基金the Chinese Academy of Sciences (CAS) Project for Young Scientists in Basic Research (YSBR-003)the Fundamental Research Funds for the Central Universities。
基金Project supported by the National Natural Science Foundation of China(Grant Nos.12074150,12174157,12174158,and 11874314)the Innovation and Entrepreneurship Talent Project of Jiangsu Province of China+1 种基金the Scientific Research Startup of Jiangsu University(Grant No.5501710001)the College Students’Innovation Training Program of Jiangsu Province of China(Grant No.202110299123Y)。
文摘Inspired by the successful synthesis of h Hv-graphane[Nano Lett.15903(2015)],a new two-dimensional(2D)Janus material Cu-graphane is proposed based on the first-principles calculations.Without the spin-orbit coupling(SOC)effect,Cu-graphane is a Dirac semimetal with a highly anisotropic Dirac cone,whose Fermi velocity ranges from 0.12×10^(5)m/s to2.9×10^(5)m/s.The Dirac cone near the Fermi level can be well described with an extended 2D Dirac model Hamiltonian.In the presence of the SOC effect,band splitting is observed around the Fermi level,and a large intrinsic spin Hall conductivity(ISHC)with a maximum value of 346(h/e)S/cm is predicted.Moreover,the spin Hall transport can be regulated by slightly adjusting the Fermi energy,e.g.,grid voltage or chemical doping.Our work not only proposes a new 2D Janus material with a highly anisotropic Dirac cone and a large ISHC,but also reveals that a large ISHC may exist in some Dirac systems.
文摘现有的生物质成型机多采用开式压缩成型结构,存在能耗高、生产率低和对物料粒度要求严格等问题。文章以降低能耗、提高生产率和增强物料适应性为目标,设计了一种新型对辊式生物质压块机,该压块机通过对辊上相向旋转的椭圆形模具型腔,实现物料的闭式压缩成型。整机采用分体机架三层式结构,通过一级螺旋压缩机、二级增压装置、三级对辊挤压装置组成的组合增压成型系统,可实现对物料的逐级压缩成型。通过脱模力计算,设计了可以提高对辊有效工作面积的椭圆形成型辊模具和增压辊人字形模具,并进行了受力分析。样机试验结果表明,样机的生产率为1 032.6 kg/h,能耗为38.8 k W·h/t、成型率为91.5%,各项指标均达到了农业行业标准(NT/T1882-2010)的要求。
文摘The stability analysis of the solution mappings for vector equilibrium problems is an important topic in optimization theory and its applications. In this paper, we focus on the continuity of the solution mapping for a parametric generalized strong vector equilibrium problem. By virtue of a nonlinear scalarization technique, a new density result of the solution mapping is obtained. Based on the density result, we give sufficient conditions for the lower semicontinuity and the Hausdorff upper semicontinuity of the solution mapping to the parametric generalized strong vector equilibrium problem. In addition, some examples were given to illustrate that our results improve ones in the literature.
