摘要：Based on the building principle of additive manufacturing,printing orientation mainly determines the tribological properties of joint *** this study,we created a polyether-ether-ketone(PEEK)joint prosthesis using fused filament fabrication and investigated the effects of printing orientation on its tribological properties using a pin-on-plate tribometer in 25% newborn calf *** ultrahigh molecular weight polyethylene transfer film is formed on the surface of PEEK due to the mechanical capture of wear debris by the 3d-printed groove morphology,which is significantly impacted by the printing orientation of *** the printing orientation was parallel to the sliding direction of friction,the number and size of the transfer film increased due to higher steady *** transfer film protected the matrix and reduced the friction coefficient and wear rate of friction pairs by 39.13%and 74.33%,***,our findings provide a novel perspective regarding the role of printing orientation in designing knee prostheses,facilitating its practical applications.

摘要：The infamous type Ⅳ failure within the fine-grained heat-affected zone (FGHAZ) in G115 steel weldments seriously threatens the safe operation of ultra-supercritical (USC) power *** this work,the traditional thermo-mechanical treatment was modified via the replacement of hot-rolling with cold rolling,i.e.,normalizing,cold rolling,and tempering (NCT),which was developed to improve the creep strength of the FGHAZ in G115 steel *** NCT treatment effectively promoted the dissolution of preformed M_(23)C_(6)particles and relieved the boundary segregation of C and Cr during welding thermal cycling,which accelerated the dispersed reprecipitation of M_(23)C_(6) particles within the fresh reaustenitized grains during post-weld heat *** addition,the precipitation of Cu-rich phases and MX particles was promoted evidently due to the deformation-induced *** a result,the interacting actions between precipitates,dislocations,and boundaries during creep were reinforced *** this strategy,the creep rupture life of the FGHAZ in G115 steel weldments can be prolonged by 18.6%,which can further push the application of G115 steel in USC power plants.

摘要：Three-dimensional(3d)printing has attracted increasing research interest as an emerging manufacturing technology for devel-oping sophisticated and exquisite architecture through hierarchical *** has also been employed in various advanced industrial *** development of intelligent biomedical engineering has raised the requirements for 3d printing,such as flexible manufacturing processes and technologies,biocompatible constituents,and alternative ***,state-of-the-art 3d printing mainly involves inorganics or polymers and generally focuses on traditional industrial fields,thus severely limiting applications demanding biocompatibility and *** this regard,peptide architectonics,which are self-assembled by programmed amino acid sequences that can be flexibly functionalized,have shown promising potential as bioinspired inks for 3d ***,the combination of 3d printing and peptide self-assembly poten-tially opens up an alternative avenue of 3d bioprinting for diverse advanced ***,a small but innovative nation,has significantly contributed to 3d bioprinting in terms of scientific studies,marketization,and peptide architectonics,including modulations and applications,and ranks as a leading area in the 3d bioprinting *** review summarizes the recent progress in 3d bioprinting in Israel,focusing on scientific studies on printable components,soft devices,and tissue *** paper further delves into the manufacture of industrial products,such as artificial meats and bioinspired supramolecular architectures,and the mechanisms,physicochemical properties,and applications of peptide ***,Israel contributes significantly to the field of 3d bioprinting and should thus be appropriately recognized.

摘要：零差混频系统(Homodyne mixing system)对太赫兹超导动态电感探测器(Kinetic inductance detectors,KIds)性能表征具有重要的作用。然而,零差混频系统仍存在混频器不平衡性、测量系统集成、干扰信号等问题。作者设计新型的单通道零差混频硬件系统,结合软件算法实现了测量系统的集成化、IQ混频器不平衡性校准、KId的性能表征;同时实现了在VNA(vector network analyzer)CW模式下的KIds噪声测量;以及基于自相关算法的双通道零差混频硬件电路设计,有效地抑制了干扰信号。值得注意的是,这些研究成果被应用于表征KIds性能,对KIds阵列设计起到了重要的作用。

摘要：在过去几十年中,将二氧化碳光还原转化为有用的化学燃料(甲烷、一氧化碳和甲醇等)受到了极大的关注.然而,由于光生电荷的复合速度快,二氧化碳和水分子的共吸附不足,目前的二氧化碳光还原系统的效率还远远不能令人满意.本文报道了在疏水碳纤维纸上构建一个紧密的二维/二维石墨相氮化碳@碘氧铋梯型(S型)异质结,用于高效的二氧化碳光还原.所制备的异质结具有良好的一氧化碳选择性(77.8%)和活性(458.0μmol h^(-1)m^(-2)).良好的光催化性能归因于良好设计的S型异质结结构,提高了电荷分离效率,以及形成了气-液-固三相界面,充分保证了二氧化碳和水的同时供给.这项工作为高效光催化二氧化碳还原系统的设计提供了新思路.

摘要：为了探索Ar/N_(2)-Ar共溅射Ti掺杂对Ta_(2)O_(5)涂层光学性能和力学性能的影响,采用射频和直流磁控共溅射技术在玻璃基底表面制备了Ta_(2)O_(5)、N_(2)-Ta_(2)O_(5)、Ti-Ta_(2)O_(5)和N_(2)-Ti-Ta_(2)O_(5)涂层。利用X射线衍射仪(Xrd)、扫描电子显微镜(SEM)、原子力显微镜(AFM)表征了Ta_(2)O_(5)、N_(2)-Ta_(2)O_(5)、Ti-Ta_(2)O_(5)和N_(2)-Ti-Ta_(2)O_(5)涂层的微观结构和表面形貌;通过紫外可见分光光度计测试了涂层的光学参数;采用纳米压痕仪测试了涂层的硬度和杨氏模量。Xrd测试结果表明,Ta_(2)O_(5)、N_(2)-Ta_(2)O_(5)、Ti-Ta_(2)O_(5)和N_(2)-Ti-Ta_(2)O_(5)涂层主要以Ta_(2)O_(5)为主体的非晶相结构组成。SEM和AFM结果显示,沉积在玻璃基底上的涂层未出现大面积空隙,溅射粒子在基底表面均匀堆积生长,并且涂层沉积厚度基本一致,厚度误差在5%以内。分别引入N_(2)和Ti及N_(2)-Ti共掺杂,均可降低Ta_(2)O_(5)涂层的粗糙度。光学测试结果表明,分别引入N_(2)和Ti元素,可以提高Ta_(2)O_(5)涂层的平均透射率至81%以上,而N_(2)-Ti共掺杂制备的N_(2)-Ti-Ta_(2)O_(5)涂层平均透射率降低。力学测试结果显示,与Ta_(2)O_(5)涂层对比,N_(2)-Ta_(2)O_(5)和N_(2)-Ti-Ta_(2)O_(5)涂层的硬度显著增大,Ti-Ta_(2)O_(5)涂层硬度基本一致。弹性指数(H/E)和塑性指数(H^(3)/E^(2))表明,N_(2)-Ta_(2)O_(5)涂层和N_(2)-Ti-Ta_(2)O_(5)涂层具备更好的断裂韧性和抗塑性变形能力。在玻璃表面制备Ta_(2)O_(5)掺杂N_(2)和Ti元素的涂层,可以实现以N_(2)-Ta_(2)O_(5)涂层和N_(2)-Ti-Ta_(2)O_(5)涂层为代表的、同时具备优异光学性能和力学性能的多功能涂层。

摘要：在流程工业关键变量预测领域,已有研究致力于将过程知识与大数据相结合,以实现更高的准确性,降低过拟合风险和提高可解释性.然而,现有工作存在准确的先验知识构建成本高、无法从丰富的数据中挖掘知识等问题,限制了这些方法在实际工业过程中的广泛应用.为了解决这些挑战,本文提出了一种基于知识协同进化的增强图卷积网络方法.首先,利用易获取的过程流图构建低成本的粗粒度流程知识.然后,在图卷积神经网络模型训练中引入图探索,实现知识更新.最后,为了降低知识复杂度并保持一致性,设计了一种知识过滤机制.所提出的方法在基准的脱丁烷塔工艺过程上进行了验证.实验结果表明,该方法具有出色的预测准确性,并获得高质量的新知识.

摘要：锂金属负极和碳酸酯类电解液之间不稳定的界面是限制高比能锂金属电池循环寿命的关键挑战.本文使用含苯环的双酚A乙氧基化物二甲基丙烯酸酯(BAEd)交联剂调节聚(丙烯酸六氟丁酯)(PHFBA),设计了一种弹性人造固体电解质中间相(rASEI)来解决这个问题.刚性BAEd分子可以对柔性PHBA基体进行调控,实现从600%伸长率到90%压缩率的卓越回弹性,并具有超过2 MPa的高杨氏模量.rASEI可以适应锂金属较大的体积变化,并确保电池运行过程中锂金属与rASEI之间的紧密接触,促进均匀的锂沉积并减少副反应.因此,经过rASEI修饰的Li‖Li对称电池可以在1 mA cm^(-2)和1 mAh cm^(-2)下实现超过500小时的长期循环.对循环后锂金属进行测试分析表明锂枝晶的生长得到了有效的抑制.此外,搭配20 mg cm^(-2)高阴极负载的NCM811软包电池在1 C下,经过200次循环后容量保持率超过85%.

摘要：Ni/TiO_(2) catalyst is widely employed for photo-driven drM reaction while the influence of crystal structure of TiO_(2) remains *** this work,the rutile/anatase ratio in supports was successfully controlled by varying the calcination temperature of anatase-TiO_(2).Structural characterizations revealed that a distinct TiO_(x) coating on the Ni nanoparticles(NPs)was evident for Ni/TiO_(2)-700 catalyst due to strong metal-support *** is observed that the TiOx overlayer gradually disappeared as the ratio of rutile/anatase increased,thereby enhancing the exposure of Ni active *** exposed Ni sites enhanced visible light absorption and boosted the dissociation capability of CH4,which led to the much elevated catalytic activity for Ni/TiO_(2)-950 in which rutile ***,the catalytic activity of solar-driven drM reaction was significantly influenced by the rutile/anatase ***/TiO_(2)-950,characterized by a predominant rutile phase,exhibited the highest drM reactivity,with remarkable H2 and CO production rates reaching as high as 87.4 and 220.2 mmol/(g·h),*** rates were approximately 257 and 130 times higher,respectively,compared to those obtained on Ni/TiO_(2)-700 with *** study suggests that the optimization of crystal structure of TiO_(2) support can effectively enhance the performance of photothermal drM reaction.

摘要：随着科学技术的发展,高新技术产业对金属的纯度要求越来越高。然而,痕量杂质的存在会对金属的性能产生不良影响。真空蒸馏工艺因其金属回收率高、环保性能好、设备简单等优点,被广泛应用于制备高纯金属。本文作者围绕真空蒸馏的原理和工艺,系统地总结了高纯金属制备的总体进展。介绍了真空蒸馏的原理、真空蒸馏炉的改进设计、参数优化和仿真模拟。根据该技术制备高纯金属的现状,指出在科学研究中机理研究和仿真模拟是必不可少的。本研究对提高生产效率、节约生产成本及提高金属纯度具有一定的借鉴意义。