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海上风电多类型直流送出系统拓扑经济性分析 [PDF]

open access: yes全球能源互联网, 2021
相比于柔性直流输电(VSC-HVDC)送出方案,送端采用不控整流器(diode rectifier,DR)的DR-HVDC方案具有损耗低、体积小和成本低的优点,是未来海上风电送出技术的重要发展方向之一。为了解决黑启动和海上交流电压调控问题,现有的DR-HVDC拓扑主要采用海上平台装设储能、系统增加交流联络线路、送端换流站并联VSC三种方案。以深远海海上风电送出为背景,对上述三种DR-HVDC拓扑方案进行了经济性分析,并与VSC-HVDC方案进行比较。采用了全寿命周期成本分析(life cycle ...
李贤育   +6 more
doaj   +1 more source

Simulation study of three-dimensional airflow structure of mesovortexes along Meiyu front(梅雨锋低涡系统三维流场结构的分析)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2004
1999年6月下旬长江中下游有一次维持时间较长的梅雨锋低涡过程,采用90-30-10 km的中尺度数值模拟资料,对6月28〜30日这一过程中两个不同尺度的低涡(中-α涡和中-β涡)进行分析:通过代表性空气质点的轨迹和物理属性个别变化的计算,揭示构成低涡的三维气流结构.结果表明:1)构成中-α涡的气流为低层西北半部干冷的东至东北气流;中低层东南象限暖湿的西南气流及高层西西北气流. 2)中-α涡南侧的西北气流在幕阜山背风坡这一有利的地形条件下与西南气流辐合,促使了中-β涡的生成.
ZHANGZhi-ying(章志英)
doaj   +1 more source

高温燃气喷流与主流干扰实验技术及研究 [PDF]

open access: yes, 2011
本文首次用实验手段研究高温燃气自由喷流(热喷流)、燃气喷流/主流干扰流对气动热环境的影响。实验主流由脉冲风洞提供,燃气喷流用氢氧燃烧驱动路德维希管(Ludwieg-tube)的方式产生。利用脉冲风洞驱动段压力信号自动控制热气源的产生以保证风洞主流与燃气喷流同步,利用氢气、氮气和氧气的不同比例实现燃气喷流的热力学相似。实验技术上完成了高温燃气喷流系统的参数采集与系统状态标定;实验内容上开展了压缩拐角平板模型的气动热实验研究,通过实验比较了只有主流流场、只有热喷流流场和既有主流流场又有热喷流流场(即干扰流场)
王发民, 唐贵明, 陈雪冬
core   +1 more source

Simulation analysis of a severe convection system with gust front(一例伴随阵风锋的强对流系统模拟分析)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2015
利用WRF中尺度数值模式较好地模拟了2009年6月5日一次严重影响浙江的伴随阵风锋的强对流过程.在得到与实况较为接近的中尺度特征后,对模拟的强对流系统特点、环流结构和气流轨迹进行分析,结果表明:该过程为前倾槽型强对流天气,高空冷平流叠置在低层暖低压之上具有明显的位势不稳定层结.在强对流系统爆发移入浙北后,主要分为前后2个伴随阵风锋的对流系统,2条阵风锋处辐合强度的相关性较好,该阵风锋主要由经向风引起,伴随明显的气压扰动.强对流后侧的低层强辐散气流伴随着大的水平强风速区,在前方形成了明显的阵风锋 ...
XUYaqin(徐亚钦)   +3 more
doaj   +1 more source

Intact coastal nursery rearing amid climate‐driven phenological shifts in threatened salmon

open access: yesConservation Biology, EarlyView.
Abstract Literature linking phenology to climate has proliferated in recent decades and shows that climate change has reorganized seasonal opportunities worldwide. However, this literature often quantifies changes in point measures of timing (e.g., beginnings and peaks) without context about duration (e.g., rearing season length) or performance (e.g ...
Stuart H. Munsch   +8 more
wiley   +1 more source

Grain Boundary Density Governs the Discharge Behavior of Mg Anodes in Biodegradable Batteries

open access: yesRare Metals, Volume 45, Issue 11, November 2026.
ABSTRACT Biodegradable magnesium (Mg) alloys have entered clinical use, yet their development as self‐powered absorbable batteries is hindered by poor anode performance, including high self‐corrosion, passivation, and nonuniform dissolution. The role of grain boundary density in governing discharge behavior remains unclear.
Xiaohui Shao   +3 more
wiley   +1 more source

天气对110 kV氧化锌避雷器全电流测量的影响

open access: yesDianci bileiqi, 2023
无间隙氧化锌避雷器运行过程中,其全电流容易受外界气象因素影响。针对该问题,本研究考虑实际全电流测量模型,基于长期实测避雷器运行现场全电流值及气象数据,分析了数据变化特征;考虑了全电流对气象变化的迟滞性以及不同气象条件,计算了气象因素对全电流相关系数;为降低气象因素对全电流测量影响,分别通过线性拟合、非线性拟合、神经网络基于温湿度对全电流进行重构计算,进一步得到被测三相避雷器的逐月全电流参考值。
史宇昊   +4 more
doaj  

Pore‐Defect Synergistic Decoupling of Electrical and Thermal Transport in Entropy‐Engineered Thermoelectric Ceramics

open access: yesRare Metals, Volume 45, Issue 11, November 2026.
ABSTRACT Pore engineering reduces the thermal conductivity of thermoelectric materials, yet typically degrades electrical conductivity by enhancing carrier scattering—a long‐standing trade‐off. Here, we overcome this trade‐off in SrTiO3‐based entropy‐engineered ceramics via a one‐step synergistic strategy: using poly(methyl methacrylate) (PMMA) as a ...
Ziyao Wei   +7 more
wiley   +1 more source

“The Land's Been Queer Longer Than the Colonizers Have Been Here. Hiy Hiy.” Impacts of Anti‐Queer and Trans Policies and Resistance Through Art, Queer Joy, and Worldmaking Among Youth

open access: yesSexuality, Gender &Policy, Volume 9, Issue 4, November 2026.
ABSTRACT This study explores how 2SLGBTQ+ youth in Alberta, Canada—the country's most Conservative province—mobilize queer joy as a form of resistance amid rising anti‐queer and anti‐trans policies under a settler colonial, cisheteropatriarchal regime. Drawing from youth‐produced collages, we demonstrate that this visual arts‐based participatory method
JJ Wright, Gillian Robinson
wiley   +1 more source

Three‐Stage Fluid‐Assisted Dual‐Mode Janus E‐Skin for Thermally Comfortable Multiplexed SERS Sweat Analysis and Strain Monitoring

open access: yesRare Metals, Volume 45, Issue 10, October 2026.
ABSTRACT Wearable sweat sensors face persistent trade‐offs between multiplexed detection, signal stability, and wearing comfort. Here, we present a Janus electronic skin (e‐skin) with dual‐mode functionality, offering both thermal and moisture comfort.
Zhi‐Mei Mu   +12 more
wiley   +1 more source

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