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A Biomass-Based Hydrogel Evaporator Modified Through Dynamic Regulation of Water Molecules:Highly Efficient and Cost-Effective 被引量:1
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作者 Boqiu Luo Jin Wen +5 位作者 Hao Wang size zheng Rui Liao Wenjing Chen Omid Mahian Xiaoke Li 《Energy & Environmental Materials》 SCIE EI CAS CSCD 2023年第3期20-30,共11页
Solar-driven hydrogel evaporator used for water purification demonstrates great potential in seawater desalination and domestic sewage treatment.However,much uncertainty still exists about the most efficient design to... Solar-driven hydrogel evaporator used for water purification demonstrates great potential in seawater desalination and domestic sewage treatment.However,much uncertainty still exists about the most efficient design to obtain cost-effective drinkable water.In this paper,a natural rich biomass Nicandra physalodes(Linn.)Gaertn.polysaccharide was introduced into the polyvinyl alcohol network to control the water distribution during evaporation and build a low-cost hybrid hydrogel solar evaporator with a total material cost of$7.95 m^(−2).The mixed evaporator works stably in a long-span acid–base range(pH 1–14)and salinity range(0–320 g kg^(−1)).Its daily water purification capacity can reach 24.4 kg m^(−2)with a water purification capacity of 3.51 kg m^(−2)h^(−1)under sunlight.This paper provides a new possibility for a highly efficient and cost-effective water desalination system with guaranteed water quality by focusing on the dynamic regulation of water molecules at the evaporation interface. 展开更多
关键词 DESALINATION HYDROGELS interfacial evaporation POLYSACCHARIDE solar energy
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The coral-inspired steam evaporator for efficient solar desalination via porous and thermal insulation bionic design 被引量:1
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作者 He Zhang Xiaoke Li +6 位作者 size zheng Jin Wen Jiaying Zhou Rui Yang Wenmei Luo Liu Yang Xiaohu Wu 《SmartMat》 2023年第6期72-83,共12页
The solar-driven interfacial evaporation(SIE)technology shows great prospects in seawater desalination and sewage treatment,but it is unable to obtain highly efficient and high-quality clean nontoxic water at low cost... The solar-driven interfacial evaporation(SIE)technology shows great prospects in seawater desalination and sewage treatment,but it is unable to obtain highly efficient and high-quality clean nontoxic water at low cost.Here,a novel biodegradable hydrogel-based solar evaporator(BBH-L)with a bionic coral structure taking Chinese ink as the solar absorber was developed.This evaporator consists of chitosan/polyvinyl alcohol hydrogel and a loofah substrate.The average evaporation rate and efficiency of BBH-L reach 4.37 kg/(m^(2)·h)and 98.2%,respectively,under one sun illumination(1 kW/m^(2)),which are attributed to its excellent thermal localization and water transporting abilities.Meanwhile,high salt resistance enables BBH-L to achieve efficient desalination and purification of other unconventional water.Heavy metal ions in seawater can be effectively removed by chelation and forming hydrogen bonds in hydrogels.This study is anticipated to provide new possibilities to enhance evaporation performance and reduce the costs of water treatment systems. 展开更多
关键词 DESALINATION hydrogel-based solar evaporator solar-driven interfacial evaporation unconventional water
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面向卷积神经网络的FPGA设计 被引量:15
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作者 卢丽强 郑思泽 +2 位作者 肖倾城 陈德铭 梁云 《中国科学:信息科学》 CSCD 北大核心 2019年第3期277-294,共18页
近年来,卷积神经网络作为深度学习中的常用算法,被广泛地应用在计算机视觉的任务中.FPGA凭借它的高并行计算、低功耗和可重复配置的特点在实现卷积神经网络的多种加速器中显示了优异的特性.近几年,使用FPGA加速卷积神经网络的方法已经... 近年来,卷积神经网络作为深度学习中的常用算法,被广泛地应用在计算机视觉的任务中.FPGA凭借它的高并行计算、低功耗和可重复配置的特点在实现卷积神经网络的多种加速器中显示了优异的特性.近几年,使用FPGA加速卷积神经网络的方法已经被人们广泛地探索,但是大部分设计的性能都受限于片上乘法器数量.快速算法在卷积操作中能够有效降低运算中乘法的数量,进而达到平衡资源的效果.本文首先介绍4种实现卷积神经网络的算法:传统的空间卷积算法、矩阵乘法、Winograd算法和FFT算法.同时介绍国内外对于不同算法在硬件上的实现,以及相应的优化手段,并且总结使用FPGA加速CNN的发展历程. 展开更多
关键词 卷积神经网络 FPGA 卷积算法 快速算法 Winograd FFT
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