摘要：Helical metal-organic frameworks(MOFs)were used as templates or precursors to fabricate helical carbon nanorods(HCNRs)for the first *** carbon contains many topological defects such as pentagonal or heptagonal carbons,which have the potential to facilitate oxygen reduction reactions(ORR).HCNRs show more positive onset/halfwave reduction potentials and higher limited current density than straight carbon nanorods(SCNRs).They also exhibit four-electron oxygen reduction in tests of ORR,while the alternative SCNRs prefer a two-electron reduction *** and theoretical studies reveal that these enhanced ORR activities can be attributed to pentagon/heptagon defects in *** work provides an effective strategy to synthesize helical,defect-rich carbon materials and opens up a new perspective for utilization of a spiral effect for the development of more effective electrocatalysts.

摘要：The coverage of network resources is increasingly extensive,and computing resources have likewise gradually become fundamental infrastructures,providing ubiquitous computing ***,in wide area networks(WANs),the underlying network and computing resources are not closely investigated or co-designed,and there are still problems reflected in slow computing service scheduling,inflexible data distribution,and inefficient data transmission.

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：Metalenses with achromatic performance offer a new opportunity for high-quality imaging with an ultracompact configuration;however,they suffer from complex fabrication processes and low focusing *** this study,we propose an efficient design method for achromatic microlenses on a wavelength scale using materials with low dispersion,an adequately designed convex surface,and a thickness profile *** taking into account the absolute chromatic aberration,relative focal length shift(FLS),and numerical aperture(NA),microlens with a certain focal length can be realized through our realized map of geometric ***,the designed achromatic microlenses with low-dispersion fused silica were fabricated using a focused ion beam,and precise surface profiles were *** fabricated microlenses exhibited a high average focusing efficiency of 65%at visible wavelengths of 410-680 nm and excellent achromatic capability via white light ***,the design exhibited the advantages of being polarization-insensitive and *** results demonstrate the effectiveness of our proposed achromatic microlens design approach,which expands the prospects of miniaturized optics such as virtual and augmented reality,ultracompact microscopes,and biological endoscopy.

摘要：To accelerate the development and design of magnesium(Mg)alloys,the structural and mechanical properties of important precipitates in Mg−Zn alloys were studied by experiments and density functional *** nano-indentation tests revealed that the hardness of the precipitates initially increased and then decreased with increasing Zn content,and was significantly higher than that of pure Mg and *** calculation results revealed that the precipitates stability initially increased and then decreased with increasing Zn *** bulk moduli of the precipitates increased,whereas their shear and Young’s moduli initially increased and then decreased with increasing Zn *** decreasing order of ductility for these compounds is MgZn_(2)>Mg21Zn_(2)5>Mg2Zn11>*** surface profiles of the compounds revealed that they are obvious *** the degree of covalency and bond length of covalent bonds initially increased and then decreased with increasing Zn content.

摘要：文章在“新旧共生”理念的大背景下,对乡村民宿游客感知进行了梳理和分析,并对乡村民宿下一步发展提出建议。文章以六合区竹镇镇大泉村为例,在梳理乡村民宿空间基因的基础上,通过构建结构方程模型的方法,探究空间基因感知对游客满意度的影响机制。把“新旧共生”理念下的文化内涵融入乡村民宿,形象地研究问题,阐述了乡村民宿在融合文化后的发展策略和设计方法。研究表明在乡村民宿中融入乡土文化不仅能够拓宽文化传播范围,还能够有效地带动乡村民宿产业发展。

摘要：Because of its high purity and excellent orientation, mesophase pitch is a superior precursor for high-performance car-bon materials. However, the preparation of top-notch mesophase pitch faces challenges. Catalytic polycondensation at low temperat-ures is more favorable for synthesizing mesophase pitch, because it circumvents the high-temperature free radical reaction of other thermal polycondensation approaches. The reaction is gentle and can be easily controlled. It has the potential to significantly im-prove the yield of mesophase pitch and easily introduce naphthenic characteristics into the molecules, catalytic polycondensation is therefore a preferred method of synthesizing highly spinnable mesophase pitch. This review provides a synopsis of the selective pre-treatment of the raw materials to prepare different mesophase pitches, and explains the reaction mechanism and associated research advances for different catalytic systems in recent years. Finally, how to manufacture high-quality mesophase pitch by using a cata-lyst-promoter system is summarized and proposed, which may provide a theoretical basis for the future design of high-quality pitch molecules.

摘要：本文旨在运用先进的生成式人工智能技术,对具有独特地域性特征的元阳哈尼族传统竹编工艺进行创新性设计探索。运用AIGC技术,如Midjourney中文生图、图生图等工具探索在元阳哈尼族传统竹编工艺创意设计实践研究中的路径方法和可行性。得到AIGC技术辅助元阳哈尼族传统竹编工艺创意设计的方法流程。为设计师、非遗传承人等提供新的思维路径和创意灵感,辅助其以更好的质量与效率提高在传统竹编工艺设计中的创新转化,融入新时代的发展中。

摘要：为了拓展六自由度平台的可达空间,提出了计及安装角参数的虎克铰干涉计算方法。根据虎克铰与相邻结构之间的位姿关系,对上、下铰座分别建立了计及安装角的虎克铰转角计算模型。采用仿真法求解了斜棱柱虎克铰的转角范围,拟合了描述虎克铰工作空间的非参数模型,建立了斜棱柱虎克铰干涉判定条件。通过分析动平台平动轨迹,探讨了铰座运动与安装角之间的变化规律。将虎克铰的干涉计算与六自由度平台的运动学反解结合,通过动平台在极限位置的运动试验,验证了虎克铰干涉计算模型在拓展六自由度平台极限位姿中的有效性。

摘要：影像数字化进程无疑是数字景观的重要领域,深度图是影像数字化进程中的技术参数,其对于数字影像空间的重塑,直指影像语言与修辞,再度谱写了数字景观中的艺术表现。在数字化进程之前,传统影像的物理空间展示主要依赖于透视法。深度图技术在数字影像中的广泛应用意味着影像不仅可以通过像素携带的位置信息还原真实的深度,还可以利用深度信息,扭曲并表现影像空间。学界首次提出深度曲线,对于影像空间的重塑有前瞻性。深度图技术对影像空间的重塑,不仅是数字景观的呈现,也对数字影像理论影响甚远。