Low Power Computing Paradigms Based on Emerging Non-Volatile Nanodevices

Traditional digital processing approaches are based on semiconductor transistors,which suffer from high power consumption,aggravating with technology node scaling.To solve definitively this problem,a number of emerging non-volatile nanodevices are under intense investigations.Meanwhile,novel computing circuits are invented to dig the full potential of the nanodevices.The combination of non-volatile nanodevices with suitable computing paradigms have many merits compared with the complementary metal-oxide-semiconductor transistor(CMOS)technology based structures,such as zero standby power,ultra-high density,non-volatility,and acceptable access speed.In this paper,we overview and compare the computing paradigms based on the emerging nanodevices towards ultra-low dissipation.     

Grain refinement in low SFE and particle-containing nickel aluminium bronze during severe plastic deformation at elevated temperatures

The influence of particle size and morphology on grain refinement in low stacking fault energy(SFE)alloys was studied by comparing the grain structures in single-and multi-phase Al-bronze(AB)alloys following equal channel angular pressing(ECAP)between 350 and 500℃.In particular,nickel aluminium bronze(NAB)was chosen as it contained both coarse and fine rounded particles,as well as a lamellar phase which evolved during ECAP.Grain refinement in the single-phase alloy was achieved through dynamic recrystallisation initiated at deformed twin boundaries.By contrast,different mechanisms were observed in the particle-containing NAB.Recrystallisation around the coarse κⅡ particles(～5 μm)was promoted through particle stimulated nucleation(PSN),whereas recrystallisation in the region of the fine κⅣ(～0.4μm)was delayed due to the activation of secondary slip.Grain refinement in areas of the lamellar κⅢ showed significant variation,depending on the lamellar orientation relative to the shear plane of ECAP.As the lamellae deformed,numerous high angle grain boundaries were generated between fragments and served as nucleation sites for recrystallisation,while PSN occurred around spheroidised lamellae.The spreading of the κⅢ particles by ECAP then enhanced the total area of recrystallised grains.     

纺织工业4.0时代——人的地位及影响因素

长期以来,数字化、工业4.0(I 4.0)及未来劳动力在日常生活中占据着不可或缺的地位。因此,人们针对企业的发展现状及所谓的"准备就绪"开展了大量的研究。迄今为止,对I 4.0的研究主要集中于技术层面,而很少从工作环境利益角度进行研究。对德国、奥地利和瑞士纺织业的35家企业进行在线研究,结果表明:多达64%的参与者来自企业管理层(高层和中、下层管理水平的参与者占相同比例),其中近34%的参与者来自大型企业。     

巴黎国立工艺美术酒店

正巴黎国立工艺美术酒店坐落于Marais区与Montorgueil街区之间,是CléGroup集团最新落成的酒店。该项目由耶路撒冷独立设计师Raphael Navot担任艺术指导,其独特大胆的设计向传统的制造工艺表达了敬意,同时也为人们提供了一种全新的巴黎生活体验。酒店的内部设计十分精致考究,尤其注重各个空间材料的选用。酒店共有66间不同风格的客房,位于一楼的餐厅和酒吧是该酒店的亮点。作为酒店的一部分,餐厅与酒吧位于巨大的玻璃屋顶之下,连接起了saint Martin与Reaumur两条大街。设计师结合Julien Cohen、Jean-Pierre Lopes与Thomas Delafon三位艺术家的美学理念,将这里变成了烹饪美食的理想之所。     

Singly ionized double-donor complex in vertically coupled quantum dots

ABSTRACT: The electronic states of a singly ionized on-axis double-donor complex (D2+) confined in two identical vertically coupled, axially symmetrical quantum dots in a threading magnetic field are calculated. The solutions of the Schrodinger equation are obtained by a variational separation of variables in the adiabatic limit. Numerical results are shown for bonding and antibonding lowest-lying artificial molecule states corresponding to different quantum dot morphologies, dimensions, separation between them, thicknesses of the wetting layers, and magnetic field strength.     

HR-TEM and FIB-SEM characterization of formation of eutectic-like structure from amorphous GdAlO3-Al2O3 system

The crystallization process of the eutectic composition of GdAlO_3-Al_2O_3 from the amorphous phase prepared by rapid-quenching of melt that leads to the formation of a cantaloupe skin-like microstructure was investigated using focused ion-beam scanning electron microscopy (FIB-SEM) and high-resolution transmission electron microscopy (HR-TEM).The amorphous films were heat-treated at temperatures between 1000 °C and 1500 °C for up to 30min to form the eutectic phases of GdAlO_3 and Al_2O_3.The GdAlO_3 and Al_2O_3 crystal phases that formed from the amorphous phase were identified by FIB-SEM and HR-TEM.Both components began to crystallize and grow from the amorphous phase separately at different temperatures.The formation process of these crystal phases was different from that of the ordinary eutectic microstructure solidified from the GdAlO_3-Al_2O_3 system.Therefore,the observed structure is termed "eutectic-like" for distinction.The microstructures formed from the amorphous phases at sufficiently high temperatures consisted of ultra-fine microstructures of individually crystallized components and were similar to ordinary eutectic microstructures.By heat-treating the amorphous films at 1500 °C for either 2 min,8min or 30min,the ultra-fine components of GdAlO_3 and Al_2O_3 were found to crystallize following a eutectic-like stage after 8min of heat treatment.     

(Computer) Vision without Sight

Computer vision holds great promise for helping persons with blindness or visual impairments (VI) to interpret and explore the visual world. To this end, it is worthwhile to assess the situation critically by understanding the actual needs of the VI population and which of these needs might be addressed by computer vision. This article reviews the types of assistive technology application areas that have already been developed for VI, and the possible roles that computer vision can play in facilitating these applications. We discuss how appropriate user interfaces are designed to translate the output of computer vision algorithms into information that the user can quickly and safely act upon, and how system-level characteristics affect the overall usability of an assistive technology. Finally, we conclude by highlighting a few novel and intriguing areas of application of computer vision to assistive technology.     

致密型MoB-CoCr涂层在钢铁工业中滚镀锌生产线中的应用

MoB/CoCr涂层具有较高的耐熔融锌侵蚀的能力,并被广泛地应用于钢铁工业镀锌生产线中[1].然而在实验室测试中,这种涂层有时还没有显示出其原有特性就失效了.研究发现,这些失效的试样往往具有较高的孔隙率,导致了熔融Zn通过孔洞加速渗透对基体钢材产生腐蚀并使涂层脱离.这表明,在实际应用中,高密度涂层对于展现其耐蚀性与保证质量的极度重要性.在本文中,我们通过优化粉末性能并采用JP-5000超音速火焰喷涂制备了高密度MoB/CoCr涂层.我们通过盐雾试验来评估涂层的致密性.最佳密度的涂层在经过300小时的盐雾试验后,其低碳钢基体材料没有发生锈蚀.另一方面,多孔的涂层在经过24～48小时的盐雾试验后,其基体材料出现了锈蚀.经盐雾试验验证的最佳涂层在工业镀锌浴中浸没90天后（＞2000小时）没有发生失效.