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Measuring Environmental Performance of Provincial Thermal Power Plants in China:A Malmquist DEA Approach with Fixed-Sum Undesirable Outputs

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Journal of Systems Science & Complexity 2022年第4期35卷 1201-1224页

作者： hou wenhui ZHENG Yunwen LIANG Liang LI Yongjun School of Management University of Science and Technology of ChinaHefei230026China

With the development of China’s economy,environmental pollution has become cumulatively *** primary source of environmental pollution is thermal power generation,which has attracted the attention of governments and academia in recent *** effectively reduce environmental pollution,research should study how to constrain the undesirable output of thermal power plants,that is,to limit the total undesirable output of the plants to a certain fixed ***,few studies have suggested that these undesirable outputs should be fixed-sum ***,no previous research publication about thermal power plants has analyzed their environmental performance *** address these gaps,a novel Malmquist-DEA approach is proposed for evaluate the environmental performance of thermal power plants in this *** approach generalizes the equilibrium efficient frontier DEA model with fixed-sum undesirable outputs and incorporates the model into the Malmquist productivity index(MPI).The authors apply this approach to the analysis of provincial thermal power plant environmental performance in China and analyze such plants’trends based on panel data from2011 to *** empirical research shows that the environmental performance of regional thermal power plants was positively affected by efficiency change and negatively affected by technical ***,the authors provide policy suggestions based on our findings.

关键词： Data envelopment analysis environmental performance fixed-sum undesirable outputs Malmquist productivity index thermal power plants

Bi_(2)S_(3) nanorods encapsulated in iodine-doped graphene frameworks with enhanced potassium storage properties

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Chinese Chemical Letters 2022年第6期33卷 3212-3216页

作者： Yi Wei wenhui hou Peng Zhang Razium A.Soomro Bin Xu State Key Laboratory of Organic-Inorganic Composites Beijing Key Laboratory of Electrochemical Process and Technology for MaterialsCollege of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029China Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical TechnologyBeijing 100029China

Bismuth sulfide(Bi_(2)S_(3))is a promising anode material for high-performance potassium ion batteries due to its high theoretical ***,the poor conductivity and substantial volume expansion hinder its practical *** proposed an iodine-doped graphene encapsulated Bi_(2)S_(3)nanorods composite(Bi_(2)S_(3)/IG)as an efficient anode for *** uniform-sized Bi_(2)S_(3)nanorods evenly in-situ encapsulated in iodine-doped graphene framework,facilitating the electron transportation and structural *** potassium storage performance was evaluated in three electrolytes,with the best option of 5 mol/L KFSI in *** reversible capacity of representative Bi_(2)S_(3)/IG reached 453.5 m Ah/g at 50 m A/***,it could deliver an initial reversible capacity of 413.6 m Ah/g at 100 m A/g,which maintained 256.9 m Ah/g after 200 *** proposed strategy contributes to improving potassium storage performance of metal sulfide anodes.

关键词： Bi_(2)S_(3) Iodine-doped graphene Potassium-ion battery Anode materials Nanorods

Strategies for flame-retardant polymer electrolytes for safe lithiumbased batteries

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Nano Research 2024年第10期17卷 8754-8771页

作者： Xiao Ma Yang Lu Yu Ou Shuaishuai Yan wenhui hou Pan Zhou Kai Liu Department of Chemical Engineering Tsinghua UniversityBeijing 100084China

The advancement of lithium-based batteries has spurred anticipation for enhanced energy density,extended cycle life and reduced capacity ***,these benefits are accompanied by potential risks,such as thermal runaway and explosions due to higher energy ***,liquid organic electrolytes are the predominant choice for lithium batteries,despite their limitations in terms of mechanical strength and vulnerability to *** development of polymer electrolytes,with their high Young’s modulus and enhanced safety features,offers a potential solution to the drawbacks of traditional liquid *** these advantages,polymer electrolytes are still susceptible to burning and *** address this issue,researchers have conducted extensive studies to improve their flame-retardant properties from various *** review provides a concise overview of the thermal runaway mechanisms,flame-retardant mechanisms and electrochemical performance of polymer *** also outlines the advancements in flame-retardant polymer electrolytes through the incorporation of various additives and the selection of inherently flame-retardant *** review aims to offer a comprehensive understanding of flame-retardant polymer electrolytes and serve as a guide for future research in this field.

关键词： lithium batteries polymer electrolyte thermal runaway flame-retardant additives energy storage materials

Smart materials for safe lithium-ion batteries against thermal runaway

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Journal of Energy Chemistry 2024年第7期94卷 360-392页

作者： Yu Ou Pan Zhou wenhui hou Xiao Ma Xuan Song Shuaishuai Yan Yang Lu Kai Liu Department of Chemical Engineering Tsinghua UniversityBeijing 100084China

In recent years,the new energy storage system,such as lithium ion batteries(LIBs),has attracted much *** order to meet the demand of industrial progress for longer cycle life,higher energy density and cost efficiency,a quantity of research has been conducted on the commercial application of ***,it is difficult to achieve satisfying safety and cycling performance *** may be thermal runaway(TR),external impact,overcharge and overdischarge in the process of battery abuse,which makes the safety problem of LIBs more *** this review,we summarize recent progress in the smart safety materials design towards the goal of preventing TR of LIBs reversibly from different abuse *** from smart responsive materials and novel structural design,the safety of LIBs can be improved a *** expect to provide a comprehensive reference for the development of smart and safe lithium-based battery materials.

关键词： Lithium ion batteries(LIBs) Thermal runaway(TR) Smart materials Safe batteries Solid electrolyte interface(SEI)

Enhanced detection algorithm for apple bruises using structured light imaging

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Artificial Intelligence in Agriculture 2024年第1期11卷 50-60页

作者： Haojie Zhu Lingling Yang Yu Wang Yuwei Wang wenhui hou Yuan Rao Lu Liu College of Engineering Anhui Agricultural UniversityHefei 230036China Key Laboratory of Agricultural Sensors Ministry of Agriculture and RuralAnhui Agricultural UniversityHefei 230094China Hefei Institute of Technology Innovation Engineering Chinese Academy of SciencesHefei 230094China

Bruising reduces the edibility and marketability of fresh apples,inevitably causing economic losses for the apple ***,bruises lack obvious visual symptoms,which makes it challenging to detect them using imaging techniques with uniform or diffuse *** study employed the structured light imaging(SLI)technique to detect apple ***,the grayscale reflection images were captured under phase-shifted sinusoidal illumination at three different wavelengths(600,650,and 700 nm)and six different spatial frequencies(0.05,0.10,0.15,0.20,0.25,and 0.30 cycles mm−1).Next,the grayscale reflectance images were demodulated to produce direct component(DC)images representing uniform diffuse illumination and amplitude component(AC)images revealing ***,by quantifying the contrast between bruised regions and sound regions in all AC images,it was found that bruises exhibited the optimal contrast when subjected to sinusoidal illumination at a wavelength of 700 nm and a spatial frequency of 0.25 mm−*** the AC image with optimal contrast,the developed h-domes segmentation algorithm to accurately segment the location and range of the bruised ***,the algorithm successfully accomplished the task of segmenting central bruised regions while addressing the challenge of segmenting edge bruised regions complicated by *** average Intersection over Union(IoU)values for the three types of bruises were 0.9422,0.9231,and 0.9183,*** result demonstrated that the combination of SLI and the h-domes segmentation algorithm was a viable approach for the effective detection of fresh apple bruises.

关键词： Apple bruises Bruise enhancement Image segmentation Structured-illumination

Characteristics of emissive spectrum and the removal of nitric oxide in N_2/O_2/NO plasma with argon additive

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Journal of Environmental Sciences 2009年第6期21卷 790-794页

作者： LIN Wenfeng,ZHANG Bin,hou wenhui,LI Dawei,YANG Hongmin School of Power Engineering,Nanjing Normal University,Nanjing 210042,China School of Power Engineering Nanjing Normal University Nanjing 210042 China. E-mail: booboo.ai@***

Although the approach using non-thermal plasma（NTP） for deNOx has been studied for over 15 years,how to achieve higher removal effciency with lower cost is still a barrier for its industrial *** order to investigate the impact of the argon additive on electron density,energy and nitric oxide reduction process in plasma,the spectrum of the dielectric barrier discharge at atmospheric pressure in a coaxial reactor was measured using the monochromater with high *** comparative experiments for NO reduction were carried out simultaneously in N2/O2/NO plasma stream with and without argon,*** nitrogen molecular spectrum which is attributed to the energy level transition（C^3πu→ B^3πg） was compared in the wavelength range 300-480 nm and the electron density and temperature were determined based on the relative intensities and Stark broadening width of spectral *** spectrum results indicated that the argon additive could enhance the intensity of emissive spectrum of plasma,thus the electron concentration as well as the energy was increased,and finally prompted the ionization rate to produce active N,O and *** results of NO reduction showed that NO conversion effciency increased in the range of 10%-30% with 5% addition of argon in stream comparing with the condition without argon *** study will play a positive role in the industrial application of dielectric barrier discharge deNOx reactor.

关键词： argon emissive spectrum nitric oxide non-thermal plasma

Recent Advances in Electrolytes for High-Voltage Cathodes of Lithium-Ion Batteries

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Transactions of Tianjin University 2023年第2期29卷 120-135页

作者： wenhui hou Yang Lu Yu Ou Pan Zhou Shuaishuai Yan Xi He Xuewen Geng Kai Liu Department of Chemical Engineering Tsinghua UniversityBeijing 100084China Power International Development Limited Beijing 100084China

With the increasing scale of energy storage,it is urgently demanding for further advancements on battery technologies in terms of energy density,cost,cycle life and *** development of lithium-ion batteries(LIBs)not only relies on electrodes,but also the functional electrolyte systems to achieve controllable formation of solid electrolyte interphase and high ionic *** order to satisfy the needs of higher energy density,high-voltage(>4.3 V)cathodes such as Li-rich layered compounds,olivine LiNiPO_(4),spinel LiNi_(0.5)Mn_(1.5)O_(4) have been extensively ***,high-voltage cathodebased LIBs fade rapidly mainly owing to the anodic decomposition of electrolytes,gradually thickening of interfacial passivation layer and vast irreversible capacity loss,hence encountering huge obstacle toward practical *** tackle this roadblock,substantial progress has been made toward oxidation-resistant electrolytes to block its side reaction with high-voltage *** this review,we discuss degradation mechanisms of electrolytes at electrolyte/cathode interface and ideal requirements of electrolytes for high-voltage cathode,as well as summarize recent advances of oxidation-resistant electrolyte optimization mainly from solvents and *** these insights,it is anticipated that development of liquid electrolyte tolerable to high-voltage cathode will boost the large-scale practical applications of high-voltage cathode-based LIBs.

关键词： High-voltage cathodes Oxidation resistance Electrolytes optimization Solvents Additives

Tomato detection method using domain adaptive learning for dense planting environments

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农业工程学报 2024年第13期40卷 134-145页

作者： LI Yang hou wenhui YANG Huihuang RAO Yuan WANG Tan JIN Xiu ZHU Jun College of Information and Artificial Intelligence Anhui Agricultural UniversityHefei 230036China Key Laboratory of Agricultural Sensors Ministry of Agriculture and Rural AffairsHefei 230036China College of Engineering Anhui Agricultural UniversityHefei 230036China

This study aimed to address the challenge of accurately and reliably detecting tomatoes in dense planting environments,a critical prerequisite for the automation implementation of robotic ***,the heavy reliance on extensive manually annotated datasets for training deep learning models still poses significant limitations to their application in real-world agricultural production *** overcome these limitations,we employed domain adaptive learning approach combined with the YOLOv5 model to develop a novel tomato detection model called as TDA-YOLO(tomato detection domain adaptation).We designated the normal illumination scenes in dense planting environments as the source domain and utilized various other illumination scenes as the target *** construct bridge mechanism between source and target domains,neural preset for color style transfer is introduced to generate a pseudo-dataset,which served to deal with domain ***,this study combines the semi-supervised learning method to enable the model to extract domain-invariant features more fully,and uses knowledge distillation to improve the model's ability to adapt to the target ***,for purpose of promoting inference speed and low computational demand,the lightweight FasterNet network was integrated into the YOLOv5's C3 module,creating a modified C3_Faster *** experimental results demonstrated that the proposed TDA-YOLO model significantly outperformed original YOLOv5s model,achieving a mAP(mean average precision)of 96.80%for tomato detection across diverse scenarios in dense planting environments,increasing by 7.19 percentage points;Compared with the latest YOLOv8 and YOLOv9,it is also 2.17 and 1.19 percentage points higher,*** model's average detection time per image was an impressive 15 milliseconds,with a FLOPs(floating point operations per second)count of 13.8 *** acceleration processing,the detection accuracy of the TDA-YOLO mo

关键词： plants models domain adaptive tomato detection illumination variation semi-supervised learning dense planting environments

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现代性与美国皮克斯动画电影的文化逻辑

装饰 2011年第4期 82-83页

作者：侯文辉南京工程学院艺术与设计学院

本文立足于文化社会学视角,对现代性日常生活与动画消费之间的隐蔽关系进行分析,指出皮克斯动画电影所蕴含的文化逻辑,是现代性日常生活的表征,也是经纬日常生活的文化心理结构和塑造现代日常生活的重要力量。

关键词：现代性皮克斯动画电影文化逻辑