Results 31 to 40 of about 11,385 (119)
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT Engineering of the catalyst interface and modulation of transition–metal d–band play critical roles in the electrocatalytic hydrogen evolution reaction (HER). Herein, a synthetic strategy is developed to fabricate nitrogen‐doped carbon nanotubes (N–CNTs)–supported Ni3Se4–CeO2 heterojunction catalysts through a facile chemical vapor deposition (
Zhiqiang Sun +10 more
wiley +1 more source
Guangtongxin yanjiu, 2009 文章仿真验证了在差分相移键控（DPSK）解调时,通过调整延时线干涉仪（DLI）两臂的相对延迟来优化自由光谱范围（FSR）,使其大于传输比特率,能够获得比传统1 bit延迟更好的传输性能,并得到了FSR的最优值。优化FSR后的DPSK解调系统对光信噪比（OSNR）灵敏度和色度色散容限范围均有改善,对偏振模色散（PMD）的容忍度没有明显提高。
曹云, 杨壮, 陈德华, 叶荣富
doaj
Jingshui jishu【目的】为支撑智慧水务发展，满足水厂精细化调度需求，提升供水效率与资源利用率，需构建时供水量预测模型以优化生产调度。【方法】以华东地区A水厂为研究对象，本文综合时间特征、气象条件、设备检修工况及水力参数构建含58个初始特征的数据集，采用递归特征消除(RFE)算法筛选出16个关键特征，同时引入贝叶斯优化(BO)对极端梯度提升树(XGBoost)模型的超参数进行寻优，建立时供水量预测模型。【结果】BO后模型平均绝对百分比误差(MAPE)为4.58%,平均绝对误差(MAE)为676.02
Yang Yuling +5 more
doaj +1 more source
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT The surging demand for high‐performance NdFeB magnets has made it essential to achieve ultrahigh coercivity while minimizing the consumption of heavy rare earths. To tackle this challenge, this study proposes a Dy/Tb bilayer grain boundary diffusion strategy and systematically investigates the co‐diffusion behavior of Dy and Tb.
Rui Chang +7 more
wiley +1 more source
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT To overcome the strength–ductility trade‐off in fabricated Ti‐2Al‐2.5Zr alloy tubes, we systematically investigated the microstructural evolution and mechanical behavior throughout thermomechanical processing, including hot working (forging and extrusion) and cold multi‐pass rolling.
Yanlong Xia +7 more
wiley +1 more source
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT VO2 is a promising thermochromic material, but it is still limited by low transparency, weak solar modulation, and poor stability. Here, we develop a coordination‐compound‐derived strategy to construct a hierarchical BiVO4/VO2@BiVO4 film with a core–shell@nanosheet structure.
Huiyan Xu +11 more
wiley +1 more source
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT To address the demand for high‐temperature stability, broadband strong absorption, and multifunctional integration of electromagnetic wave absorbing materials in complex service environments, lightweight molybdenum disulfide (MoS2) decorated silicon carbide (SiC) nanofiber composite aerogels with a directional layered interconnected structure ...
Zhi Song +4 more
wiley +1 more source
Gongye shui chuli, 2014 以杭州市七格污水处理厂三期工程为例，尝试采用高压隔膜压滤机实现污泥深度脱水的可行性，并对污泥的化学调理方式进行了优化选择，对不同化学调理方式的成本、压滤机处理能力、污泥含水率、污泥绝干量等进行了综合评价。结果显示，采用无机和有机絮凝剂复合调理相比单一混凝剂的化学调理效果更优，可以使污泥含水率降至60%以下，同时污泥深度脱水工艺可以大大削减污泥量，经济优势明显。
杨晓胤 +6 more
doaj
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT Bone restoration is often hindered by the spatiotemporal dysregulation of immune and regenerative signals. Conventional bio‐inert implants, providing only passive support, fail to modulate this microenvironment, leading to infections and poor healing.
Zhizhong Sun +8 more
wiley +1 more source
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT The development of lightweight, high‐attenuation, and broadband carbon‐based electromagnetic wave absorbers is hindered by the intrinsic trade‐off between impedance matching and dielectric dissipation. Herein, we report a facile and scalable synthesis of N‐doped lignin‐derived interconnected porous carbon (Nx‐LIPC) via hydrogen‐bond self ...
Bin‐Peng Zhang +7 more
wiley +1 more source