Results 11 to 20 of about 10,315 (110)
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
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
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)
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
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
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
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
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
Inverse Thermal Softening Behavior in a High‐Entropy Alloy Under Various Strain Rates
ABSTRACT Although face‐centered cubic high‐entropy alloys (HEAs) have received extensive attention and in‐depth research, most existing studies focus on single temperature or strain rate conditions, lacking systematic investigations into deformation mechanisms under extreme thermomechanical coupling environments.
Zhi Wang +6 more
wiley +1 more source
ABSTRACT Photocatalytic hydrogen peroxide (H2O2) production from water and oxygen driven by solar energy represents a highly promising green and sustainable strategy. Herein, lignin‐derived carbon quantum dots (LCDs) were strategically introduced at the heterojunction between a Bi‐based metal organic framework (Bi‐MOF) and ZnIn2S4 (ZIS).
Wanpeng Sun +8 more
wiley +1 more source
Green Hydrogen in Brazilian Media: Dominant Narratives and Missing Dimensions of the Energy Trilemma
ABSTRACT Media discourses help shape the visibility and legitimacy of energy transition pathways in the public sphere. This study examines how Brazilian mainstream newspapers framed green hydrogen and assesses the alignment of these narratives with the energy trilemma: energy security, environmental sustainability, and social accessibility. We analyzed
Flávia Mendes de Almeida Collaço +3 more
wiley +1 more source

