摘要：The application of thermoelectric devices(TEDs)for personalized thermoregulation is attractive for saving energy while balancing the quality of *** that directly attach to human skin remarkably minimized the energy wasted for cooling the entire ***,facing the extreme dynamic geometry change and strain of human skin,conventional TEDs cannot align with the contour of our bodies for the best thermoregulation ***,we designed a kirigami-based wearable TED with excellent water vapor permeability,flexibility,and *** analysis and experimental results reveal that our product can withstand various types of large mechanical deformation without circuit *** stated outcome and proposed facile approach not only reinforce the development of wearable TEDs but also offer an innovative opportunity for different electronics that require high conformability.

摘要：在全球追求可持续清洁能源的背景下,电解水被视为一种高效生产氢气的方法,其效能极大依赖于催化剂的表现.设计实用催化剂时,活性和稳定性是至关重要的因素.尽管传统研究倾向于使用热力学活性来解释实验结果并指导新型催化材料的开发,研究催化剂的动力学活性和稳定性却未受到足够关注.本文分析了酸性条件下非贵金属催化剂在动力学活性和稳定性方面的局限,并提出了计算评估催化剂稳定性的标准化方法,同时探讨设计低成本、高效能催化剂面临的挑战.

摘要：Sweat could be a carrier of informative biomarkers for health status identification;therefore,wearable sweat sensors have attracted significant attention for *** external power source is an important component of wearable sensors,however,the current power supplies,i.e.,batteries,limit further shrinking down the size of these devices and thus limit their application areas and ***,we report a stretchable self-powered biosensor with epidermal electronic format that enables the in situ detec-tion of lactate and glucose concentration in *** biofuel cells serve as self-powered sensing modules allowing the sweat sensor to exhibit a determination coefficient(R2)of 0.98 with a sensitivity of 2.48 mV/mM for lactate detection,and R2 of 0.96 with a sensitivity of 0.11 mV/μM for glucose *** microfluidic channels developed in an ultra-thin soft flexible polydimethylsiloxane layer not only enable the effective collection of sweat,but also provide excellent mechanical properties with stable performance output even under 30%*** presented soft sweat sensors can be integrated at nearly any location of the body for the continuous monitoring of lactate and glucose changes during normal daily activities such as *** results provide a promising approach to develop next-generation sweat sensors for real-time and in situ sweat analysis.

摘要：Eutectic and near-eutectic high entropy alloys(HEAs) have recently attracted a great deal of interest because of their promising properties, such as an excellent castability and unique combination of good ductility and high strength. However, in the absence of a phase diagram, it remains a non-trivial task to find a eutectic or near-eutectic composition for a HE A system, which usually demands a tremendous amount of efforts if a trial-and-error approach is followed. In this paper, we briefly review the thermodynamics that governs the eutectic solidification in regular binary and ternary alloys, and proceed to the discussion for the design of eutectic HEAs. Based on the data reported, we then propose an improved strategy which may enable an efficient search for the eutectic or near eutectic HEA compositions.

摘要：《中国制造2025》计划要求从顾客到产品等全部环节的全面自动化。这将为生产制造系统的各个环节带来巨大挑战。在未来的加工制造领域中,全部的设备和系统应当具有对控制性和适应性的感知能力和基础智能化处理的能力。在研究中,经过关于多尺度动力学在现代加工制造系统中应用的讨论后,一个五层的功能结构被用于不确定的加工制造过程。多尺度力学包括:多时间尺度、多时空尺度以及多尺度的动力学标准。随着快速与慢速的时间尺度对设计的更多要求,不同的尺度所对应的不同控制行为也将呈现区分化。低速时间尺度下的操作需要更多的定量化手段,与此同时,高速时间尺度下的监管也需要更多高质量的手段。智能生产系统应当拥有灵活应变的能力、较好的适应能力及足够的智能化程度。这些能力需要我们通过控制性手段进行区分化处理并应用在不同方面,如智能感知、优化设计、智能学习等。最后,将一个典型的喷射点胶系统模型用于多尺度建模和控制。

摘要：电解水反应包括析氢和析氧反应.相对于2电子转移的析氢反应,4电子转移的析氧反应比较缓慢.因此,理解析氧反应机制有助于设计高效电催化剂.其中析氧反应机制可以分为传统吸附机制和直接氧析出机制.在本文中,我们将蜂窝状Ni_(3)N-Co_(3)N生长在碳布上来调研其直接氧析出机制.密度泛函理论和原位拉曼证明了Ni_(3)N-Co_(3)N在反应过程中是直接氧析出机制,其中Ni_(3)N和Co_(3)N共同拉拽OH^(-)、劈裂H-O和吸附另外的OH^(-)基团,从而降低了反应活化能.不仅如此,蜂窝状结构和导电基体有助于结构稳定和提高氧气释放速率.因此,Ni_(3)N-Co_(3)N/CC在10和100 mA cm^(-2)电流密度下提供了320和495 mV的小过电势.同时,它也拥有更好的长期稳定性.

摘要：In this paper we introduce a video post-processing method that enhances the rhythm of a dancing performance,in the sense that the dancing movements are more in time to the beat of the *** dancing performance as observed in a video is analyzed and segmented into motion intervals delimited by motion *** present an image-space method to extract the motion beats of a video by detecting frames at which there is a significant change in direction or motion *** motion beats are then synchronized with the music beats such that as many beats as possible are matched with as little as possible time-warping distortion to the *** show two applications for this cross-media synchronization:one where a given dance performance is enhanced to be better synchronized with its original music,and one where a given dance video is automatically adapted to be synchronized with different music.

摘要：实验被设计暴露喂过滤器的瓣鳃类 Perna viridisto 不同的污染 Cd 的水环境以便比较 Cd 通过被积累的不同小径。结果证明贻贝能在时间的一个短时期通过海水，食物，沉积和推迟的粒子小径积累 Cd。贻贝“通过海水小径的 Cd 的举起到达最高的集中比通过水藻和沉积小径大约 3 和 9 倍分别地在 7 d 以后。这显示通过海水的 theCd 累积是很有效的。结果也显示举起直接通过贻贝摄取的污染水藻，粒子或沉积是不太重要的什么时候与由通过海水小径的贻贝的 Cd 的举起相比。由海洋的瓣鳃类的简历累积的金属举起小径和机制也在这篇论文被讨论。

摘要：椭圆曲线密码系统是最近十几年来获得迅速发展的一类密码系统.为了提高椭圆曲线密码系统的处理速度,针对其中最关键的运算——椭圆曲线标量乘法设计并实现了一种基于FPGA的硬件结构,完成GF(2m)上的椭圆曲线标量乘法计算.该结构最大程度地对标量乘算法的内部模块进行了并行处理,缩短最大延迟路径,从而达到提高运算速度的目的.这一结构在FPGA上实现后,计算一次GF(2163)上的椭圆曲线标量乘法只需要36μs,这一性能是目前国际上已知的基于FPGA的标量乘法器中最好的.

摘要：宽范围精准调控非晶材料的光学性能是面向光电器件等潜在应用亟需解决的关键问题之一.研究发现,通过在非晶合金CoFe-Ta-B体系中引入氧可以诱导金属-绝缘体转变,从而制备出一系列涵盖金属、半导体和绝缘体的非晶态衍生物.随着氧含量的不断增加,这些含氧非晶态衍生物的光学带隙打开,薄膜逐渐变得透明.复合高反射率的非晶合金和高透过率的非晶氧化物形成的双层薄膜结构可以实现可见光波段的全色谱可调.该研究结果为研制具有高硬度、高耐磨性、设计制备简便、全色谱可调等优异性能的大面积彩色涂层提供了一条新的途径.同时,该研究提出的设计理念可能适用于已报道的很多非晶合金体系,通过这种氧调控方式可制备出涵盖金属、半导体和绝缘体所有导电类型的非晶材料,用于研制基于这些材料光学功能特性的器件.