Results 101 to 110 of about 64,092 (179)
Gaoya dianqi, 2011 为了减小测量误差,设计一种计算量小、采样精度高、可同时测量相角、频率和幅值的方法,笔者分析了同步相量的主要测量算法和现有同步相量测量方法。由传统的DFT算法引入计算量少的递推傅里叶算法,通过变换得到一种改进型递推离散傅里叶算法,并给出频率测量的方法,对同步向量测量进行误差分析,并提出改进措施和方案。实验由高精度和可调节的信号源作为相量采集装置的输入量,实验结果表明,基于递推DFT同步相量测量算法正确。
徐建源, 王亮, 林莘, 腾云
doaj
[Design of a dynamic measurement system for Bl factor spatial distribution of resonant blood viscoelastic sensor]. [PDF]
Sheng Wu Yi Xue Gong Cheng Xue Za Zhi, 2023 Qian J, Sun H, Wang B.
europepmc +1 more source
Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT Composite materials hold significant potential for abrasive sealing, yet composite materials used for abrasive sealing fall short in service durability under extreme environments. Here, a controllable strategy for adjusting pore structure is proposed, aiming to design a YSZ(ESP)/BN@ZrO2‐polyester coating with hybrid micron/nanometer ...
Shuang Yu +8 more
wiley +1 more source
Feasibility analysis of digital method for measuring supracrestal tissue height crest around implant. [PDF]
Hua Xi Kou Qiang Yi Xue Za Zhi, 2023 Li L +6 more
europepmc +1 more source
Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT Rechargeable aluminium‐ion batteries (RAIBs) are promising candidates for sustainable energy storage owing to their low cost, safety, and resource abundance. However, the lack of durable cathode materials restricts their development. Here, we propose a topology‐guided design strategy by synthesizing three thioether‐bridged naphthoquinone ...
Jia Qiao +8 more
wiley +1 more source
Gaoya dianqi, 2018 随着输电电压等级的提高,变电站运行时的可听噪声污染问题越来突出,特高压变压器是特高压变电站内主要噪声源,准确测量其运行状态下的噪声值对变电站噪声控制具有重要指导作用。文中以某1 000 kV特高压变压器为对象,采用声压法、离散点法声强测量和扫描法声强测量方法,在变电站现场对同台特高变压器运行时的噪声声功率进行测量,研究这3种不同方法的适用性。测量结果表明,在测量现场存在外界噪声干扰和防火墙声反射作用下,声压法测量结果误差较大,声强测量结果准确。说明2种声强测量方法都可适用于某1 000 ...
徐征宇 +6 more
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[Study on the difference of high frequency dielectric properties of biological tissues measured by air and packed coaxial probe]. [PDF]
Sheng Wu Yi Xue Gong Cheng Xue Za Zhi, 2023 Qin Y, Yang L, Fu F, Dai M, Zhang L.
europepmc +1 more source
Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT Recovering palladium (Pd) from low‐concentration metallurgical wastewater still poses significant challenges. In this study, triaminoguanidine hydrochloride was used as the key functional site, and three guanidine‐functionalized covalent organic frameworks (GCOFs) were successfully constructed by adjusting the substituents (–H, –OH, and –OCH3)
Jiaxing Xiong +9 more
wiley +1 more source
[Anthropometric assessment on prepubertal boys with hypospadias: a multicenter case series]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi, 2023 Wang X +11 more
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Hierarchical Structured TiO2/Boron‐Doped Diamond for Efficient Photo‐Electrocatalytic Degradation
Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT The discharge of refractory organic dye wastewater poses a significant threat to the ecological environment, necessitating the development of efficient treatment technologies. Herein, a uniform TiO2 array (TiO2‐AR) electrode is fabricated using a combination of magnetron sputtering and a mask plate process with a boron‐doped diamond (BDD ...
Haiming Sun +10 more
wiley +1 more source