Results 81 to 90 of about 13,453 (210)
Carbon‐Insertion‐Engineered WS2 Hierarchical Heterostructure Enabling Superior Sodium‐Ion Storage
Rare Metals, EarlyView.ABSTRACT Tungsten disulfide (WS2) is considered a promising anode material for sodium‐ion batteries (SIBs). However, its practical application is hindered by poor electrical conductivity, large volume changes during cycling, and sluggish ion diffusion kinetics, which lead to unsatisfactory electrochemical performance.
Xiuli Hu +9 more
wiley +1 more source
Gaoya dianqi, 2015 针对三相分立式永磁机构断路器对其配套永磁机构的小型化、低电压、小电流、大保持力等特殊要求,设计并研发了一套新型永磁机构。笔者主要研究在较低电压下永磁机构的分、合闸过程中动铁心的位移、速度等机械参数与时间的关系,确定线圈电流、静态保持力等优化参数。采用有限元法对永磁机构进行分析研究,在Maxwell 2D建立了永磁机构的仿真模型,并根据仿真结果结合样机数据对三相分立式永磁机构优化设计。试验结果证明,优化后的永磁机构各项技术参数达到了设计要求。
林莘 +4 more
doaj
Rare Metals, EarlyView.ABSTRACT Reliable operation of high‐performance magnetostrictive devices, composed of the giant magnetostrictive material (GMM), that is, the TbDyFe alloy, critically depends on an optimally tailored bias magnetic field. Sufficient intensity and uniformity are essential to induce the ideal initial strain in the GMM, enabling peak reciprocating output ...
Jinan Yu +12 more
wiley +1 more source
Female Employment Choices and Income Responses,An Empirical Study Based on the Data of CGSS (2010-2013) [PDF]
, 2017 本文基于中国综合社会调查（CGSS）2010年——2013年的调查数据，根据雇佣方式以及单位性质的不同，结合就业风险及稳定性，将中国从事非农职业的女性就业选择分为：自我雇佣、国有企事业单位、集体企事业单位、私营等其他单位以及临时就业五类。首先，运用多元logit回归模型分析影响城镇和农村女性就业选择的因素；其次，利用OLS多元线性回归模型，分析城镇和农村女性不同就业选择的收入效应。 对就业选择而言，城乡女性的就业选择依据工作的稳定性排列，就业偏好表现出：国有企事业单位>集体/私营单位>自我雇佣/临时就业。
田越
core
Rare Metals, EarlyView.ABSTRACT The limited osteogenic capacity of magnesium phosphate cement (MPC) has constrained its biomedical applications, underscoring the necessity to develop MPC with enhanced physical properties and bone‐forming capabilities. In this study, a multifunctional MPC system was developed by incorporating zoledronic acid‐loaded near‐infrared (NIR ...
Bin Wang +8 more
wiley +1 more source
The Research on Business Model Innovation for Promoting the Industrial Park Development —A Case Study on Shekou Industrial Zone [PDF]
, 2015 经济增长的动力来源于技术进步与创新。对国家而言，意味着不断融入全球产业分工体系，顺应经济发展规律，进行产业转型升级。上世纪80年代以来,我国各地政府成立大量的产业园区,抓住全球产业转移的机遇,促进了国民经济高速发展。但是，随着中国进入工业化中后期，中国产业园区的发展暴露了很多问题,很多园区企业仅限于简单的产业“扎堆”,因为缺乏良好规划协调,没有形成聚集效应，没有产生平台增幅效应，面对全球经济一体化和互联网时代新经济浪潮冲击显得缺乏手段，应对乏力，对城市区域一体化的“产城融合 ...
贺洪涛
core
Rare Metals, EarlyView.ABSTRACT The detection of volatile organic compounds (VOCs) holds significant implications in environmental monitoring and disease diagnosis. Traditional gas detection technologies are constrained by complex operation and high cost, thereby failing to satisfy real‐time detection demands.
Yuening Wang +11 more
wiley +1 more source
Guangtongxin yanjiu, 2015 为了降低环境温度变化对外腔可调谐激光器波长稳定性的影响,采用有限元分析方法得出了外腔可调谐激光器的温度场分布特点和热变形机理,提出了一种优化的光具座结构,并对优化结构的散热性能和热变形进行了理论分析和数值模拟。结果表明,该优化的光具座结构具有高效的传热性能,大幅降低了热变形对腔长的影响,从而提高了激光器的在不同工作环境温度下的波长稳定性。
李长安, 江毅
doaj
Rare Metals, EarlyView.ABSTRACT In recent years, the field of magnetic materials has witnessed a paradigm shift from single‐function applications to multifunctional integration, driven by the growing demand for smart materials in advanced technologies. Among various magnetic systems, La(Fe, Si/Al)13‐series materials have emerged as particularly promising candidates due to ...
Irfan Liaquat +2 more
wiley +1 more source
Gaoya dianqi, 2016 局部放电超声阵列检测方法是将阵列传感器与阵列信号处理技术应用于局部放电超声检测中的一种新方法,具有信噪比高、检测可靠性高等优点。相比较满阵,稀疏阵列传感器检测系统结构简单,成本低廉,能够满足工程需要。现有的稀疏结构优化设计算法相对复杂,会影响检测的成功率和准确度。因此,文中提出一种基于降维技术的圆环形局放超声阵列传感器（circular ring partial discharge ultrasonic array sensors,CRPDUAS）的稀疏结构优化设计方法 ...
刘丹 +5 more
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