Compared to the last decade when the convolution neu-ral network(CNN)dominated the research field,machine learn-ing(ML)algorithms have reached a pivotal moment called the generative artificial intelligence(AI)era.With...Compared to the last decade when the convolution neu-ral network(CNN)dominated the research field,machine learn-ing(ML)algorithms have reached a pivotal moment called the generative artificial intelligence(AI)era.With the emer-gence of large-scale foundation models[1],such as large multi-modal model(LMM)GPT-4[2]and text-to-image generative model DALL·E[3].展开更多
One of the core competencies of a supermarket lies in its branding.With the continuous development of the market economy and the ongoing evolution of consumer demand,private brands have progressively emerged as signif...One of the core competencies of a supermarket lies in its branding.With the continuous development of the market economy and the ongoing evolution of consumer demand,private brands have progressively emerged as significant contributors to supermarket growth.However,a pivotal developmental challenge for supermarkets is navigating the innovative decision-making process between private brands and designated manufacturers.This paper aims to investigate the innovative decisions between private brands and designated manufacturers,along with the relevant promotional strategies employed during entry into the United States market.展开更多
针对如何在降低火电机组调频损耗,提高系统调频性能的同时减小储能全寿命周期成本,提出了一种混合储能辅助火电机组参与自动发电控制(automatic generation control,AGC)的双层优化配置模型。上层模型由基于经验模态分解(empirical mode...针对如何在降低火电机组调频损耗,提高系统调频性能的同时减小储能全寿命周期成本,提出了一种混合储能辅助火电机组参与自动发电控制(automatic generation control,AGC)的双层优化配置模型。上层模型由基于经验模态分解(empirical mode decomposition,EMD)的火电–混合储能间AGC指令分配策略和计及全寿命周期内成本收益之差、AGC综合评判指标Kp的多目标优化配置模型组成,为底层模型提供AGC初步分解指令和功率、容量约束;底层模型由计及储能荷电状态(state of charge,SOC)恢复的混合储能控制策略和火电–混合储能调频响应模型组成,将经过EMD初步分解的AGC指令再次分配给各调频资源,并向上层模型提供各调频资源出力响应曲线和SOC变化曲线;采用基于优劣解距离法(technique for order preference by similarity to an ideal solution,TOPSIS)的多目标粒子群算法求解该双层模型,避免了传统多目标粒子群算法在Pareto解集中确定全局最优解的偶然性。基于华北某电厂运行数据开展仿真分析,结果表明混合储能双层优化配置模型可以有效降低火电机组调频损耗,显著提高火储联合调频系统经济性,为混合储能辅助传统调频电源提供配置方案参考。展开更多
As a promising counterpart of two-dimensional metamaterials,metasurfaces enable to arbitrarily control the wavefront of light at subwavelength scale and hold promise for planar holography and applicable multiplexing d...As a promising counterpart of two-dimensional metamaterials,metasurfaces enable to arbitrarily control the wavefront of light at subwavelength scale and hold promise for planar holography and applicable multiplexing devices.Nevertheless,the degrees of freedom(DoF)to orthogonally multiplex data have been almost exhausted.Compared with state-of-theart methods that extensively employ the orthogonal basis such as wavelength,polarization or orbital angular momentum,we propose an unprecedented method of peristrophic multiplexing by combining the spatial frequency orthogonality with the subwavelength detour phase principle.The orthogonal relationship between the spatial frequency of incident light and the locally shifted building blocks of metasurfaces can be regarded as an additional DoF.We experimentally demonstrate the viability of the multiplexed holograms.Moreover,this newly-explored orthogonality is compatible with conventional DoFs.Our findings will contribute to the development of multiplexing metasurfaces and provide a novel solution to nanophotonics,such as large-capacity chip-scale devices and highly integrated communication.展开更多
基金This research was supported in part by ACCESS-AI Chip Center for Emerging Smart Systems,sponsored by InnoHK funding,Hong Kong SAR,and HKUST-HKUST(GZ)20 for 20 Cross-campus Collaborative Research Scheme C031.
文摘Compared to the last decade when the convolution neu-ral network(CNN)dominated the research field,machine learn-ing(ML)algorithms have reached a pivotal moment called the generative artificial intelligence(AI)era.With the emer-gence of large-scale foundation models[1],such as large multi-modal model(LMM)GPT-4[2]and text-to-image generative model DALL·E[3].
文摘One of the core competencies of a supermarket lies in its branding.With the continuous development of the market economy and the ongoing evolution of consumer demand,private brands have progressively emerged as significant contributors to supermarket growth.However,a pivotal developmental challenge for supermarkets is navigating the innovative decision-making process between private brands and designated manufacturers.This paper aims to investigate the innovative decisions between private brands and designated manufacturers,along with the relevant promotional strategies employed during entry into the United States market.
文摘针对如何在降低火电机组调频损耗,提高系统调频性能的同时减小储能全寿命周期成本,提出了一种混合储能辅助火电机组参与自动发电控制(automatic generation control,AGC)的双层优化配置模型。上层模型由基于经验模态分解(empirical mode decomposition,EMD)的火电–混合储能间AGC指令分配策略和计及全寿命周期内成本收益之差、AGC综合评判指标Kp的多目标优化配置模型组成,为底层模型提供AGC初步分解指令和功率、容量约束;底层模型由计及储能荷电状态(state of charge,SOC)恢复的混合储能控制策略和火电–混合储能调频响应模型组成,将经过EMD初步分解的AGC指令再次分配给各调频资源,并向上层模型提供各调频资源出力响应曲线和SOC变化曲线;采用基于优劣解距离法(technique for order preference by similarity to an ideal solution,TOPSIS)的多目标粒子群算法求解该双层模型,避免了传统多目标粒子群算法在Pareto解集中确定全局最优解的偶然性。基于华北某电厂运行数据开展仿真分析,结果表明混合储能双层优化配置模型可以有效降低火电机组调频损耗,显著提高火储联合调频系统经济性,为混合储能辅助传统调频电源提供配置方案参考。
基金supported by the Science and Technology Projects of Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province(IKKEM)No.HRTP202231partially supported by the Agency for Science,Technology,and Research(A*STAR)under AME IRG Grant Nos.A20E5c0095,and CDF Grant No.C210112044。
文摘As a promising counterpart of two-dimensional metamaterials,metasurfaces enable to arbitrarily control the wavefront of light at subwavelength scale and hold promise for planar holography and applicable multiplexing devices.Nevertheless,the degrees of freedom(DoF)to orthogonally multiplex data have been almost exhausted.Compared with state-of-theart methods that extensively employ the orthogonal basis such as wavelength,polarization or orbital angular momentum,we propose an unprecedented method of peristrophic multiplexing by combining the spatial frequency orthogonality with the subwavelength detour phase principle.The orthogonal relationship between the spatial frequency of incident light and the locally shifted building blocks of metasurfaces can be regarded as an additional DoF.We experimentally demonstrate the viability of the multiplexed holograms.Moreover,this newly-explored orthogonality is compatible with conventional DoFs.Our findings will contribute to the development of multiplexing metasurfaces and provide a novel solution to nanophotonics,such as large-capacity chip-scale devices and highly integrated communication.
