Results 51 to 60 of about 12,978 (169)
Gaoya dianqi, 2013 为满足特高压直流输电工程用直流分压器的校准需求,研制了一台±1 200 kV标准直流分压器。在设计制造过程中,通过电场仿真优化了分压器的结构和屏蔽环的设计,分压电阻采用特殊的屏蔽结构减小了泄漏电流和电容电流的影响,然后对标准分压器进行了量值溯源并进行了国内比对,依据不确定度的评定方法分析了测量不确度分量,给出了总测量不确定度。
袁渊 +5 more
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Gaoya dianqi, 2023 随着柔性直流输电技术的不断成熟，直流输电变得越发普及，而高压直流断路器作为直流输电系统的关键部分，其重要性不言而喻。针对现有高压直流断路器存在故障时短路电流大、分断速度慢、避雷器吸收能量过高等问题，提出了一种具有限流能力的新型高压直流断路器拓扑，该拓扑在传统直流断路器换流支路基础上增加了H型桥限流部分，利用平波电抗器与限流部分共同限流，可以显著降低故障时电流的上升速率与峰值。文中详细说明了新型拓扑的基本工作原理，对故障分断过程进行理论分析并给出相关参数的影响关系及选取依据，通过搭建基于Pscad ...
章宝歌, 荣耀, 张振
doaj
People and Nature, Volume 7, Issue 7, Page 1749-1768, July 2025.Abstract Social‐ecological systems (SES) are coupled systems formed by the intricate interactions between humans and nature. Our movement towards sustainable lifestyles requires a robust understanding of these interactions. Achieving a sustainable win‐win situation for both social and ecological systems, therefore, necessitates a sound scientific ...
Na Sa +6 more
wiley +1 more source
, 2001 由于反射式气动传感器测量原理不同于传统的背压式气动传感器 ,从而能够使其量程大幅度提高。对他的误差进行分析 ,找出了影响其精度的因素 ,使气动传感器具有更大的实用性 ,从而更好地应用于机械制造和其他行业。机械工业部技术发展基金项目 (97JA0 2 0 ...
丁兴号, 赵前程, 邓善熙
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Experimental research on a direct-detection optical OFDM system based on cascaded variable coefficient training sequences and pre-emphasis technique [PDF]
, 2013 Frequency selective fading (FF)caused by digital to analog converter and optical fibe dispersion in optical fiber link was analysed,and signal-signal mixing interference (SSMI) when the orthogonal frequency division multiplex-ing (OFDM) signal was ...
Jian-jun YU +4 more
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Integrative Conservation, Volume 4, Issue 1, Page 71-84, March 2025.Gaoligong Mountain is home to a large number of rare and endangered species, but the effectiveness of conservation measures in the Gaoligong Mountain Nature Reserve remains uncertain. We predicted the potential distribution areas of 361 rare and endangered wild plants in southern Gaoligong Mountain under current and future climate change scenarios and ...
Yong‐Jing‐Wen Yang +3 more
wiley +1 more source
Development of Dual Channel TV Transmitterwith Image and Audio Modulators [PDF]
, 1996 本文介绍用于机场航班彩色动态信息显示系统的小功率双频道电视发送装置的设计，包括系统的方块组成和工作原理及其主要电路。In this paper,the design of small power dual channel TV transmitter For use in colourdynamic inFormation display system of airport marking and clearing is presented in detail.Themain contents ...
黄云鹰
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短路电流中带有直流分量时的交流高压断路器燃弧时间差的概率分布特性
Gaoya dianqi, 1994 根据三相短路电流中带有直流分量时的开断过程,提出了分析和计算燃弧时间差的方法,据此求出了中性点接地与不接地系统的短路电流中带有直流分量时,燃弧时间差的分布规律.本文也列出了开断电流波形与电弧能量的关系.
曹荣江, 顾霓鸿, 盛勇
doaj
Robust video watermarking algorithm for H.264/AVC based on texture feature [PDF]
, 2012 On the basis of analyzing some existing video watermarking al ithms and combining with the new features of the H.264/AVC video coding standard,a new robust video watermarking algorithm based on texture feature was proposed.The proposed algorithm firstly ...
Jian-yi LIU +4 more
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Coordinate transformation based coefficients estimation algorithm for digital predistortion of RF power amplifiers [PDF]
, 2015 Based on the low-IF digital predistortion (DPD) architecture,a coordinate transformation based low-complex coefficients estimation algorithm is proposed to reduce the hardware implementation cost and numerical calculation complexity significantly.The ...
GHao HUAN +3 more
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