摘要：Aqueous hybrid supercapacitors(AHSCs)offer potential safety and eco-friendliness compared with conventional electrochemical energy storage devices that use toxic and flammable organic *** can serve as the bridge between aqueous batteries and aqueous supercapacitors by combining the advantages of high energy of the battery electrode and high power as well as long lifespan of the capacitive *** the past few decades,extensive research efforts have been devoted to developing advanced materials and fascinating device architectures for ***,further development related to the compatibilities between the battery-type electrode and capacitive electrode remains stagnant mainly due to discrepancy encountered in terms of reaction kinetics and *** review focuses on the recent progress made in the field of AHSCs via elucidating the main concepts on the design of battery and capacitive electrodes and emerging *** particular,ingenious AHSCs that possess either better flexibility toward materials selection or better device functionality such as those with“dual-ion”energy storage mechanism and non-polarity feature are also *** advances and unresolved issues in multivalent ion hybrid devices(in particular,zinc-ion AHSCs)are further ***,future research directions and challenges for AHSCs are presented,which are anticipated to deliver higher energy and demonstrate greater multifunctionalities for more breakthrough technology applications.

摘要：The third-order nonlinear optical(NLO)materials with stimuli-responsive properties have received extraordinary attention due to their controllable photophysical *** this work,two attractive metal complexes third-order NLO switches,which are far superior to congeneric optical switches in terms of their performance conversion,versatility,and fast response,were successfully designed and *** test of their third-order NLO properties proves that the metal complexes exhibit reverse saturable absorption and self-defocusing *** light irradiation,the third-order NLO behavior turns quickly into self-focusing *** relation between the molecular structures and the third-order NLO properties was investigated via1H nuclear magnetic resonance and ultraviolet-visible *** results show that the metal ions have a significant influence on the NLO behavior and reveal the origin of third-order NLO properties via Z-scan determinations,pump-probe technology,and density functional theory *** metal complexes can be used as third-order NLO switches with excellent fatigue resistance and broaden the application range of third-order NLO materials with adjustable performances.

摘要：城市正处于创新转型、美丽发展的关键阶段,对于城市景观风貌的提升提出了新的要求。以浙江省舟山市为例,挖掘城市景观风貌特色,基于景观风貌的全面系统感知,探索了新型城市景观风貌专项规划的研究编制方法。

摘要：西山矿区是山西省采煤区的重要组成部分,为补充矿区地应力测试空白和研究掌握矿区地应力场分布规律与变化特征,采用小孔径水压致裂地应力测量装置,在西山矿区9个煤矿,完成59个测点的原位地应力测量,从地应力场类型、地应力量级、水平主应力方向以及侧压比等多角度分析表征地应力场分布规律等参量的变化特征,分析矿区煤系沉积岩地层不同岩性岩体水平主应力及侧压比随埋深的变化关系,研究西山煤矿区地应力场分布规律,探究岩性对矿区地应力场分布规律的影响。结果表明:西山矿区主要为中深部矿井,井下地应力场以水平应力为主,构造应力场占绝对主导优势,地应力量级主要为中等水平,低应力水平次之,地应力值随埋深增加而增大,但离散性也非常显著,埋深不仅决定地应力场类型,而且影响地应力量级;水平最大主应力方向呈NW向和NE向,主要为N5°W^N90°W和N6°E^N87°E,约各占50%;正断层带附近水平主应力呈明显增大变化特征,水平最大主应力方向发生扭转,为导致矿区地应力值异常和离散的主要影响因素;最大侧压比为0.80~4.23,其大小与地应力场类型相关,小于1为自重应力场,大于1为构造应力场,超过2水平应力完全占主导地位,平均侧压比为0.61~3.19,与埋深拟合曲线和霍克-布朗提出的曲线相似,但由于仅为西山特定煤矿区沉积岩地层测量数据故数值上存在明显差异;岩性不同岩体水平主应力值大小随埋深增加均增大,但应力增长梯度显现出差异性,岩性不同岩体两类侧压比随埋深增加均趋向于定值,但两类侧压比曲率大小呈现出明显的差异化特征,岩性仅为影响矿区地应力场分布规律的因素之一,很难依据单因素精确判定构造应力场的分布规律。

摘要：为了对深部高应力裂隙煤岩体变形破坏特征及改性强化机理进行研究,首先采用小孔径水压致裂法对埋深500 m左右和1000 m左右的地应力分布特征进行现场实测研究,以此为基础对比分析了不同埋深条件下地应力分布特征、煤岩体破裂强度及典型裂隙分布发育特征,拟合得到了不同埋深条件下裂隙煤岩体摩尔强度包络线公式。采用数值模拟方法对比研究了不同埋深不同应力水平条件下煤岩体不同角度裂隙变形破坏特征。根据裂隙扩展应变能释放率与能量吸收率间的关系,探讨了影响深部裂隙煤岩体改性强化的主要影响因素。通过建立裂隙悬臂梁力学模型,采用格里菲斯裂纹扩展破坏准则分析了裂隙扩展临界载荷和裂隙不同角度间的关系。基于现场实测及数值模拟研究结果,通过对不同埋深煤岩体破裂强度的统计分析,结合煤岩体改性强化的工艺及装备要求,提出了深部裂隙煤岩体改性强化的基本原则及临界值范围。基于上述研究成果,在千米深井工作面巷道进行了现场试验,得到了裂隙煤岩体改性强化高压注浆全过程改性压力曲线。通过对裂隙煤岩体不同改性强化阶段浆液扩散特征的分析,最大注浆改性强化压力为30 MPa,一般为15~20 MPa,与提出的改性原则相符。通过现场取样表征分析、实验室扫描电镜对尺度2~20μm浆液固结体特征进行对比分析,采用纳米压痕试验对浆液固结体和煤岩体的界面弹性模量效应进行了分析,从宏观到微观验证了裂隙煤岩体改性强化效果良好。

摘要：为了研究模具间隙对无取向硅钢冲片质量的影响规律,针对电机铁芯常用的冷轧无取向硅钢50WW470和50WW800,设计了一套高精度浮动式冲裁试验模具。通过系统性冲裁试验,分析模具间隙对冲片毛刺高度、回弹和椭圆度的影响。结果表明,冷轧无取向硅钢冲裁后,毛刺高度随模具间隙增加而增大;在一定范围内,回弹量随模具间隙增加而减小;椭圆度是由材料力学性能与残余应力分布不均匀综合导致的,板料垂直轧制方向的力学性能比平行轧制方向好,而平行轧制方向的残余压应力比垂直轧制方向大。因此,冲裁后零件平行于轧制方向回弹更大,故其尺寸也更大。去应力退火后,残余应力降低,各向异性程度降低,零件椭圆度降低10%~60%。