Results 41 to 50 of about 4,067 (158)
Gaoya dianqi, 2006 当多根电缆埋地敷设时,电缆之间热的相互影响使每根电缆的载流量不同程度的降低。每根电缆的载流量由IEC60287给定公式计算,其环境温度由土壤环境温度和其他电缆在该点的温升迭加所决定。其他电缆在该点的温升可以采用镜像法计算。这样,每一根电缆额定载流量将由其他电缆决定,用高斯-赛德尔迭代法对以额定载流量为变量的方程组进行求解,计算了电缆群等负荷、不等负荷以及环境因素对载流量的影响。试验结果表明,计算结果符合工程实际要求。
梁永春 +4 more
doaj
Optimal scalable redeployment algorithm of relay nodes in wireless sensor networks [PDF]
, 2012 A relay node redeployment algorithm was proposed to find the optimal location of redeployment relay node when an existed relay node was overloaded considering the multi-dimensional localization and bandwidth constraint.The algorithm translated the ...
Bin ZENG, Jun WEI, Lu YAO
core
Delay-optimal spectrum decision method for cognitive network [PDF]
, 2012 Spectrum decision was investigated within the confine of spectrum management framework for cognitive radio networks.Sensing errors in PHY layer,outage probability on wireless channel and multiple interruptions of primary user were taken into ...
Hao LI +6 more
core +1 more source
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT Photodetectors, based on GaAs nanowires (NWs), hold significant promise in the fields of high integration micro‐ and nano‐optoelectronics applications because of their outstanding electronic and optical properties. To date, significant efforts have been directed toward enhancing the performance of photodetectors, aiming for high detectivity ...
Yu Hao +11 more
wiley +1 more source
Gaoya dianqi, 2021 分析直流偏磁对变压器造成的异常振动噪音规律是预防变压器故障的前提。为此,针对E型电力变压器,根据"铁心—绕组"模型分析了直流偏磁下变压器的振动噪音机理并利用Comsol搭建了电磁—振动—声场多物理场耦合模型,研究直流量大小、直流量从初级绕组流入和直流量从次级绕组流入两种情况下,直流偏磁对不同运行状况变压器的振动噪音规律和对绕组电压电流波形的影响。研究表明:直流量从初级绕组流入对空载变压器的影响最大,随直流量的增加铁心绕组上的振动噪音加剧且振动噪音最大值分布在铁心上 ...
吴静 +6 more
doaj
Innovation and practice of efficient integrated tunneling and bolting in semi-coal rock roadways [PDF]
The efficient and rapid excavation of semi-coal rock roadways is a major engineering challenge that needs to be addressed urgently in the mines with ten-million-ton productivity in Shaanxi-Inner Mongolia mining area. A series of technical issues, such as
Hong WANG +4 more
core +1 more source
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT Organic‐inorganic metal halide perovskite solar cells (PSCs) are promising for photovoltaics due to their excellent optoelectronic properties. However, achieving high efficiency and stability remains challenging, mainly due to defects and energy losses at the electron transport layer (ETL)/perovskite interface.
Jiahui Jin +8 more
wiley +1 more source
Research on P2P streaming media identification based on UDP [PDF]
, 2012 Several popular P2P networks TV were studied,and their differences in port usage and packet size distribution were analyzed thoroughly.By observing the above characteristics,the conclusions that network TV application employs only one port to generate ...
Gang WANG, Shi DONG
core +1 more source
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT Developing low‐energy‐input electrocatalytic systems for efficient hydrogen production is crucial for advancing sustainable energy technologies. The overall hydrazine splitting (OHzS) has emerged as a promising strategy to reduce the overall energy consumption by replacing the sluggish oxygen evolution reaction.
Haozhou Chen +13 more
wiley +1 more source
Traceback analysis of abnormal access to electronic resources from the perspective of encrypted traffic [PDF]
To trace the misuse of university library electronic resources, such as excessive downloading and frequent access, the Sun Yat-sen University traffic big data analysis platform was leveraged to analyze abnormal access behaviors from the perspective of ...
HE Haitao +4 more
core +1 more source