Results 41 to 50 of about 22,435 (127)
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT With the continuous advancement of materials science and technology, the rare metal gallium has increasingly emerged as a promising alternative to the toxic metal mercury. Although existing research has predominantly focused on the high electrical conductivity and excellent deformability of liquid metal (LM), its intrinsic fluidic property ...
Feifan Guo +6 more
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智能科学与技术学报, 2019 针对矿山无人化的迫切需求与研究现状，提出了基于 ACP 方法的端对端平行无人矿山系统解决方案。首先分析了无人矿山运输系统的研究现状；设计了平行无人矿山的基本框架；提出了平行无人矿山运输系统的主要模块，包括：无人矿山管控中心、无人矿卡运输平台、半自主挖掘/铲运平台和远程接管平台4部分；并探讨了实现平行无人矿山系统的7个关键技术，即虚拟端平行矿山构建、矿山环境感知与定位、矿山设备的单机无人控制、多设备之间的协同作业、平行矿山管控、平行接管决策以及矿山网络通信 ...
杨超 +6 more
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Advances in Elemene Nanodelivery Systems: From Material Design to Disease Treatment
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT Elemene (ELE) is a bioactive sesquiterpenoid extracted from traditional Chinese herbs, demonstrating broad‐spectrum antitumor, anti‐inflammatory, and analgesic properties with significant therapeutic potential. However, its clinical utility is constrained by inherent physicochemical limitations, including volatility and hydrophobicity, which ...
Xiao Wang +9 more
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智能科学与技术学报, 2019 四轴飞行器控制活动杆件或装水酒杯平衡是一项难度系数极大的任务，所构成的模型称为四轴飞行器—倒立摆不倒平衡控制系统。基于这种特殊形式的倒立摆不倒平衡控制模型，在X-Z平面简化为线性不倒模型进行分析，建立其动力学模型，并结合滑模控制的算法，设计系统的控制器并进行仿真实验。利用滑模控制算法对四轴飞行器—倒立摆不倒平衡控制系统进行控制，实验结果表明，其表现出了优异的不倒稳定性。
孔凡国 +4 more
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Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT Converting CO2 to CH4 under mild conditions is a promising strategy for solving environmental and energy problems, but also a challenge. In this work, the low‐temperature CO2 hydrogenation process over Ni/CeO2 catalysts was significantly accelerated by optimizing the H2 dissociation ability of Ni through the size effect, thus A‐Ni/CeO2 with an
Yu Xie +8 more
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Zhongguo shiyan zhenduanxue, 2012 目的检测人附睾蛋白4（HE4）在移行细胞癌中的水平,推测其与移行细胞癌肿瘤学特征的关联性。方法我们选择45例移行细胞癌患者,20例良性泌尿系统疾病患者,10例健康者。观察病人的年龄、性别、体重指数及肿瘤的分级、分期等基本临床资料,分析泌尿系统移行细胞癌病人手术前、后血清人附睾蛋白4的水平变化。结果移行细胞癌的HE4水平明显高于良性肿瘤组及健康对照组,差异有统计学意义 ...
时春雷, 朱强, 韩莎莎, 张海峰
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Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT This study introduces novel nonequiatomic TiZrCoCrMoCux (x = 0, 5, 10; at%) medium‐entropy alloys (MEAx) tailored for orthopedic implants, synergistically combining the biocompatibility of Ti‐based alloys, the wear resistance of CoCrMo alloys, and the antibacterial/osteogenic attributes of Cu. The alloy's microstructure, mechanical properties,
Hang Yu +9 more
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World Water Policy, Volume 12, Issue 1, February 2026.ABSTRACT Urban expansion significantly impacts flood risk, particularly in rapidly growing areas where impervious surfaces exacerbate surface runoff. This study examines spatial patterns of urban growth and their effects on flood exposure in Mecklenburg County, North Carolina, from 2011 to 2021.
Pegah Madadi, Azad Sadeghi
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直流侧串联的多VSC-HVDC并联运行系统直流侧电压平衡控制方法
Gaoya dianqi, 2008 为提高VSC-HVDC系统传输容量,可采用直流侧串联的多VSC-HVDC并联运行系统,但需解决其直流侧电压平衡问题。笔者对其平衡控制方法进行分析,对系统存在自身参数不一致、指令功率突变、交流外部故障情况进行仿真验证。为降低器件开关频率并提高波形质量,采用了载波移相的控制方法。仿真结果证实了所提出的直流侧串联的多VSC-HVDC并联运行系统直流侧电压平衡控制以及载波移相方法用于该系统的有效性。
石新春, 周国梁, 付超
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智能科学与技术学报大模型技术的发展为融合生物人、数字人和机器人的平行人系统构建提供了崭新思路和智能基础。但是，在面临复杂系统的管控任务时，仍然存在着知识更新受限、专用能力不足以及信息隐私泄露等问题。为此，提出了检索增强生成驱动的平行人与平行智能框架——RAG-PHI，打造了开放式数据平台，为平行人系统接入实时知识、行业知识及私有知识；构建动态路由检索，进行上下文抓取和平行人能力重组；引入上下文提示学习增强思维与行为能力。进一步，面向平行人的组织管理、培训评估和运营生产模式，提出了基于RAG-PHI架构的平行人社区 ...
田永林, 王兴霞, 王雨桐, 王建功, 郭超, 范丽丽, 沈甜雨, 武万森, 张红梅, 朱正秋, 王飞跃
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