Results 51 to 60 of about 22,554 (129)
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT High‐entropy alloys (HEAs) have attracted considerable interest from researchers owing to their tunable chemical compositions, exceptional structural stability, and promising catalytic properties. However, their large‐scale application is often hindered by complex manufacturing techniques and poor durability.
Sheng Guo +9 more
wiley +1 more source
智能科学与技术学报, 2021 直接法SLAM不在前端提取图像特征点，使得后端无法生成视觉词袋，这导致大部分直接法SLAM无法使用带有词袋模型的闭环检测来消除系统的累积误差。针对此问题，提出一种基于改进M-ORB的视觉SLAM直接-闭环检测算法，生成闭环检测所需的词袋模型，然后采用词频-逆文档频率算法对视觉词典树各个子节点中的视觉单词进行自适应分配权重，得到场景信息的准确表述。在TUM、KITTI两种公开数据集上进行了对比实验，实验结果表明，所提出的算法能够有效检测到闭环，并在不降低准确性的同时，提高SLAM的实时性与鲁棒性。
李伟 +4 more
doaj
A main-memory database recovery subsystem based on hybrid logging(基于混合日志的内存数据库恢复子系统)
Zhejiang Daxue xuebao. Lixue ban, 2001 介绍了一个基于混合日志（即逻辑日志与物理日志相结合）的内存数据库恢复子系统MDMRS的设计.MDMRS有效地减少了事务日志信息量，缩短了系统恢复时间.文中详细阐述了MDMRS的事务处理、日志管理、基于分区的检查点，以及数据库恢复处理，最后对MDMRS进行了性能分析.
SONGGuang-hua(宋广华) +1 more
doaj +1 more source
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT The development of sodium‐ion batteries (SIBs) is limited by slow charge transfer kinetics and large material volume changes caused by the large radius of Na+. Leveraging the excellent physicochemical properties and unique heterostructures of metal selenides, ultrafine hetero‐CuFeSe2‐CoSe2 nanoparticles are in situ wrapped by ...
Ying Zhu +5 more
wiley +1 more source
Design of DNA random access memory(DNA随机存储器的设计)
Zhejiang Daxue xuebao. Lixue ban, 2005 近年来，生物大分子在模拟计算领域的研究已经取得了很大的突破，无论是理论模型的研究，还是生化实验的验证，生物分子计算机正蓬勃地展现出它的无可限量的发展前景.DNA随机存储器的研究在整个生物分子计算机研究中是一个重要分支.DNA随机存储器以环状单链DNA分子为存储介质，以4种碱基（腺嘌呤adenine、鸟嘌呤guanine、胞嘧啶cytosine和胸腺嘧啶thymine）对信息进行编码；以DNA分子与各种生化酶（Nicking核酸内切酶、核酸外切酶、聚合酶）间的生化反应来模拟数据的读取和写入.
SHENJun-jie(沈俊杰) +1 more
doaj +1 more source
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Efficient and durable bifunctional electrocatalysts are vital for scalable water electrolysis. Here, we realize cobalt‐vacancy (Covac) engineering in CoFeP supported on N,P‐codoped carbon nanocages (Co1‐vacFeP/NPC) through a simple route comprising a CoFe Prussian blue analog precursor, phosphidation–pyrolysis, tannic‐acid etching, and a ...
Yuan‐Liang Yuan +6 more
wiley +1 more source
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT The development of efficient and stable bifunctional catalysts remains a key challenge for green hydrogen production via electrochemical water splitting. In this study, a bimetallic Mo/Fe‐doped CoP2 nanoleaf array anchored on carbon cloth (Mo, Fe‐CoP2@CC) was synthesized from zeolitic imidazolate framework‐L (ZIF‐L) via an ion‐exchange and low‐
Xiangqun Zeng +6 more
wiley +1 more source
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Biomass‐derived quinones are promising green and sustainable cathode materials for sodium‐ion batteries (SIBs), yet their practical application is hindered by poor cycling stability due to dissolution in conventional electrolytes. Herein, we demonstrate that sodiumation is an effective strategy to enhance both rate capability and cycling ...
Xinyue Zhu +4 more
wiley +1 more source
智能科学与技术学报, 2021 轨道交通工业控制系统是国家重要的基础设施之一。随着信息技术的迅速发展和网络形势的逐渐严峻，轨道交通工业控制系统信息安全受到了越来越多的关注。分析了轨道交通工业控制系统的系统组成，总结了轨道交通工业控制系统面临的安全威胁种类，举例剖析了轨道交通工业控制系统信息安全风险演化，并进一步对轨道交通工业控制系统信息安全威胁趋势进行了解析。最后，给出了轨道交通工业控制系统信息安全技术的发展建议。
李浥东 +5 more
doaj
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT NiFe‐based MIL‐55 metal‐organic frameworks (MOFs) face challenges in achieving atomically precise composition and reliable methods for uniform growth. This study addresses these challenges by applying a slow evaporation crystallization technique to crude colloidal MIL‐55 products from hydrothermal synthesis, resulting in highly uniform ...
H. R. Haris +10 more
wiley +1 more source