Results 11 to 20 of about 1,226,577 (254)
物联网学报针对智能反射面（IRS, intelligent reflecting surface）辅助的多输入单输出（MISO, multiple input single-output）无线携能通信（SWIPT, simultaneous wireless information and power transfer）系统，考虑基站最大发射功率、IRS反射相移矩阵的单位膜约束和能量接收器的最小能量约束，以最大化信息传输速率为目标，联合优化了基站处的波束成形向量和智能反射面的反射波束成形向量。为解决非凸优化问题 ...
基于DDPG的智能反射面辅助无线携能通信系统性能优化
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Isolation, Identification and Neuroprotective Effect of Bioactive Substances from Cornus officinalis(山茱萸中生物活性物质的分离、鉴定及其神经保护作用) [PDF]
Shipin kexue jishu xuebao, 2021 To study the chemical constituents in ethanol extract of Cornus officinalis and their neuroprotective activity. The chemical constituents exerted neuroprotective effect were isolated and purified by normal phase silica gel column chromatography, Sephadex
LUAN Na(栾娜) +7 more
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全球能源互联网, 2021 极端扰动事故下，城市综合能源系统易发生大量元件同时故障的严重事故，严重威胁城市综合能源系统供能的安全性和可靠性。韧性是用于描述系统抵御扰动并快速恢复到正常运行状态的能力，因此，准确的韧性评估和有效的韧性提升措施是增强城市综合能源系统抵御供能中断能力的重要手段。在简述了城市综合能源系统韧性的定义和城市综合能源系统韧性的影响因素基础上，对目前存在的韧性评估方法、负荷恢复策略和韧性提升措施进行综述，总结了目前的研究现状，为后续城市综合能源系统的韧性评估和提升方法研究提供一定的参考。
张儒峰, 李雪, 姜涛, 陈厚合
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Effect of Simulated Transport Time on Physiology and Quality of Mango During Low-Temperature Storage(模拟运输时间对芒果低温贮藏过程中生理与品质的影响) [PDF]
Shipin kexue jishu xuebao, 2020 In order to investigate the effect of different transportation time on the physiology and quality of mango during the later low-temperature storage, simulated transportation experiments of mango on the analog transport vibration table at 180r/min for 12 ...
WEI Saichao(卫赛超), XIE Jing(谢晶)
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智能科学与技术学报, 2022 在 HVAC 控制领域，基于模型的最优控制方法得到了学者的广泛研究与验证，但是该方法高度依赖模型的准确性、大量历史数据的收集以及传感器的部署。针对上述问题，结合 EnergyPlus、实际系统参数以及历史数据，构建 HVAC 优化控制模型，并提出一种改进的双池 DQN 算法，最后将其应用于 HVAC 系统中不同型号冷机的负荷分配、冷却塔风机频率以及冷却水泵频率的组合优化控制。基于所构建的问题模型，针对决策优化过程中存在的样本不平衡的问题，该算法在 DQN 的基础上，建立两个独立的经验池 ...
马帅 +6 more
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Effects of Lactobacillus plantarum Y42 Cell-Free Culture Supernatant on Listeria monocytogenes Biofilm Formation(植物乳杆菌Y42无细胞培养上清抑制单增李斯特菌生物膜形成研究) [PDF]
Shipin kexue jishu xuebao, 2018 In this study, the effect of cell-free aulture supernatant of Lactobacillus plantarum-Y42 on the biofilm formation of Listeria monocytogenes (LM) was assessed. Minimum inhibitory concentration (MIC) of L.
SONG Xing(宋杏) +5 more
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Jianzhu Gangjiegou Jinzhan, 2022 地震作用下，减小耗能段的残余变形和优化自复位结构的耗能机制，是提高建筑结构震后功能恢复能力与抗震性能的重要方式之一。基于预应力钢绞线、滑移连接和短剪切形耗能段的力学性能，提出一种抗震性能良好的组合体。为探究组合体的抗震性能，采用校正的有限元分析方法对5个有限元模型进行分析，得到了组合体分析模型的滞回性能、自复位性能、耗能能力和等效塑性应变等抗震指标。有限元分析结果表明：组合体具有良好的承载力、耗能能力和自复位性能；组合体分析模型的损伤集中在可更换的耗能段上 ...
熊墨强 +3 more
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Equine Veterinary Journal, EarlyView.Abstract Background The middle conchal sinus (MCS) (ethmoidal sinus) remains one of the least understood equine paranasal compartments. Despite recognition of its involvement in sinonasal disease, disorders of the MCS often remain underdiagnosed in the absence of computed tomographic (CT) imaging due to limited anatomical understanding and challenges ...
J.‐B. Pavard +3 more
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Journal of Adolescence, EarlyView.ABSTRACT Introduction Following rapid iterations in media technologies, Chinese millennials (born between 1980 and 1995) find themselves in a paradoxical state where digital saturation exists alongside fatigue, making them central practitioners of digital minimalist behavior.
Chao Zhang, Yinze Hao, Jingwen Li
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Beyond Universalism: A Contextual Approach to Comparative Public Administration
Public Administration and Development, EarlyView.ABSTRACT In this essay, I advocate for a contextual approach to comparative public administration, arguing that effective governance reform requires moving away from universal models to embrace local political, socioeconomic, and institutional realities.
XiaoHu Wang
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