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A thermodynamic perspective on electrode poisoning in solid oxide fuel cells

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International Journal of Minerals,Metallurgy and Materials 2024年第6期31卷 1449-1455页

作者： Kevin huang Department of Mechanical Engineering University of South CarolinaColumbiaUSA

A critical challenge to the commercialization of clean and high-efficiency solid oxide fuel cell(SOFC)technology is the insuf-ficient stack lifespan caused by a variety of degradation mechanisms,which are associated with cell components and chemical *** components related degradation refers to thermal/chemical/electrochemical deterioration of cell materials under operating conditions,whereas the latter regards impurities in feedstocks of oxidant(air)and reductant(fuel).This article provides a thermodynamic perspective on the understanding of the impurities-induced degradation mechanisms in *** discussion focuses on using thermodynamic ana-lysis to elucidate poisoning mechanisms in cathodes by impurity species such as Cr,CO_(2),H_(2)O,and SO_(2) and in the anode by species such as S(or H_(2)S),SiO_(2),and p_(2)(or pH_(3)).The author hopes the presented fundamental insights can provide a theoretical foundation for search-ing for better technical solutions to address the critical degradation challenges.

关键词： impurities air fuel reaction activity

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Tsinghua Science and Technology 2024年第4期29卷 971-984页

作者： Yuze peng Shengjun Xu Qingkun Chen Wenjin huang Yihua huang School of Electronics and Information Technology Sun Yat-sen UniversityGuangzhou 510006China Guangdong provincial Key Laboratory of Optoelectronic Information processing Chips and Systems Sun Yat-sen UniversityGuangzhou 510006Chinaand Southern Marine Science and Engineering Guangdong LaboratoryZhuhai 519080China

popularity plays a significant role in the recommendation system. Traditional popularity is only defined as a static ratio or metric (e.g., a ratio of users who have rated the item and the box office of a movie) regardless of the previous trends of this ratio or metric and the attribute diversity of items. To solve this problem and reach accurate popularity, we creatively propose to extract the popularity of an item according to the proportional Integral Differential (pID) idea. Specifically, Integral (I) integrates a physical quantity over a time window, which agrees with the fact that determining the attributes of items also requires a long-term observation. The Differential (D) emphasizes an incremental change of a physical quantity over time, which coincidentally caters to a trend. Moreover, in the Session-Based Recommendation (SBR) community, many methods extract session interests without considering the impact of popularity on interest, leading to suboptimal recommendation results. To further improve recommendation performance, we propose a novel strategy that leverages popularity to enhance the session interest (popularity-aware interest). The proposed popularity by pID is further used to construct the popularity-aware interest, which consistently improves the recommendation performance of the main models in the SBR community. For STAMp, SRGNN, GCSAN, and TAGNN, on Yoochoose1/64, the metric p@20 is relatively improved by 0.93%, 1.84%, 2.02%, and 2.53%, respectively, and MRR@20 is relatively improved by 3.74%, 1.23%, 2.72%, and 3.48%, respectively. On Movieslen-1m, the relative improvements of p@20 are 7.41%, 15.52%, 8.20%, and 20.12%, respectively, and that of MRR@20 are 2.34%, 12.41%, 20.34%, and 19.21%, respectively.

关键词： popularity proportional Integral Differential(pID) algorithm session-based recommendation user’s interests

Homological Transfer between Additive Categories and Higher Differential Additive Categories

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Acta Mathematica Sinica,English Series 2024年第5期40卷 1325-1344页

作者： Xi TANG Zhao Yong huang School of Science Guilin University of Aerospace TechnologyGuilin 541004P.R.China Department of Mathematics Nanjing UniversityNanjing 210093P.R.China

Given an additive category C and an integer n≥*** higher differential additive category consists of objects X in C equipped with an endomorphism ϵ_(X)satisfying ϵ_(X)^(n).Let R be a,finite-dimensional basic algebra over an algebraically closed field and T the augmenting functor from the category of finitely generated left R-modules to that of finitely generated left R/(t^(n))-*** is proved that a finitely generated left R-module M isτ-rigid(respectively,(support)τ-tilting,almost completeτ-tilting)if and only if so is T(M)as a left R[t]/(t^(n))-***,R isτm-selfinjective if and only if so is R[t]/(t^(n)).

关键词： Higher differential objects Wakamatsu tilting subcategories G_(ω)-projective modules sup-portτ-tilting modules τ_(m)-selfinjective algebras precluster tilting subcategories

Aberrant protamination in sperm correlates to anomalous nuclear and cytoplasmic architectures in infertile males with sperm dysmorphology

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Asian Journal of Andrology 2024年第2期26卷 183-188页

作者： Huan Jiang Chu-Jie huang Department of Reproductive Endocrinology Longgang District Maternity&Child Healthcare Hospital of Shenzhen City(Longgang Maternity and Child Institute of Shantou University Medical College)Shenzhen 518172China Institute of Reproductive Immunology College of Life Science and TechnologyJinan UniversityGuangzhou 510632China

Aberrant sperm protamination is linked to sperm dysmorphology and nuclear chromatin ***,its effects on sperm cytoplasmic maturation remain largely *** relationships of protamines,sperm morphology,DNA damage,and cytoplasmic remodeling were illustrated in this study to provide fresh perspectives on the mechanisms of male infertility.A total of 205 infertile males were allocated into 5 groups according to the percentage of spermatozoa exhibiting abnormal morphology within their *** concentration,motility,abnormal sperm morphology,cytoplasmic droplets(CDs),and excess residual cytoplasm(ERC)were analyzed according to the World Health Organization manual(2010).Sperm nuclear vacuoles(NVs)were determined by propidium iodide(pI)*** protamine expressions(p1 and p2)were detected by western *** damage was measured by acridine orange test(AOT)to calculate the proportion of sperm with single-strand DNA breaks(SSBs).Our data showed that sperm concentration and motility in infertile males significantly decreased with the severity of abnormal sperm morphology(both pp1 level,p1/p2 ratio,and SSB rate increased with the severity of sperm dysmorphology,whilst the p2 level decreased(all pperm dysmorphology and positively correlated with the SSB rate(all pps between the SSB rate and the p1/p2 ratio were also significant(pprotamination may cause sperm dysmorphology and compromise male fertility by impairing sperm's nucleus and cytoplasm maturation,with the p1/p2 ratio potentially serving as a valuable indicator of sperm quality and male fertility.

关键词： abnormal sperm morphology excess residual cytoplasm male infertility protamines sperm DNA damage sperm nuclear vacuoles

Bifurcation analysis of an SIS epidemic model with a generalized non-monotonic and saturated incidence rate

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International Journal of Biomathematics 2024年第4期17卷 39-73页

作者： Chunxian huang Zhenkun Jiang Xiaojun huang Xiaoliang Zhou School of Mathematics and Statistics Lingnan Normal University Zhanjiang Guangdong 524048P.R.China

In this paper,a new generalized non-monotonic and saturated incidence rate was introduced into a susceptible-infected-susceptible(SIS)epidemic model to account for inhibitory effect and crowding *** dynamic properties of the model were studied by qualitative theory and bifurcation *** is shown that when the infuence of psychological factors is large,the model has only disease-free equilibrium point,and this disease-free equilibrium point is globally asymptotically stable;when the influence of psychological factors is small,for some parameter conditions,the model has a unique endemic equilibrium point,which is a cusp point of co-dimension two,and for other parameter conditions the model has two endemic equilibrium points,one of which could be weak focus or *** addition,the results of the model undergoing saddle-node bifurcation,Hopf bifurcation and Bogdanov-Takens bifurcation as the parameters vary were also *** results shed light on the impact of psychological behavior of susceptible people on the disease transmission.

关键词： SIS epidemic model generalized non-monotone and saturated incidence rate saddle-node bifurcation Hopf bifurcation Bogdanov-Takens bifurcation

Synergistic Tuning of Nickel Cobalt Selenide@Nickel Telluride Core-Shell Heteroarchitectures for Boosting Overall Urea Electrooxidation and Electrochemical Supercapattery

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Energy & Environmental Materials 2024年第1期7卷 301-312页

作者： Diab Khalafallah Weibo huang Mingjia Zhi Zhanglian Hong State Key Laboratory of Silicon Material School of Materials Science and EngineeringZhejiang University38 Zheda RoadHangzhou 310027China Mechanical Design and Materials Department Faculty of Energy EngineeringAswan UniversityP.O.Box 81521AswanEgypt

Herein,we demonstrate the synthesis of bifunctional nickel cobalt selenide@nickel telluride(Ni_(x)Co_(12-x)Se@NiTe)core-shell heterostructures via an electrodeposition approach for overall urea electrolysis and *** 3D vertically orientated NiTe dendritic frameworks induce the homogeneous nucleation of 2D Ni_(x)Co_(12-x)Se nanosheet arrays along similar crystal directions and bring a strong interfacial binding between the integrated active *** particular,the optimized Ni_(6)Co_(6)Se@NiTe with an interface coupling effect works in concert to tune the intrinsic *** only needs a low overpotential of 1.33 V to yield a current density of 10 mA cm^(-2)for alkaline urea ***,the full urea catalysis driven only by Ni_(6)Co_(6)Se@NiTe achieves 10 mA cm^(-2)at a potential of 1.38 V and can approach a constant level of the current response for 40 ***,the integrated Ni_(6)Co_(6)Se@NiTe electrode delivers an enhanced specific capacity(223 mA h g^(-1)at 1 A g^(-1))with a high cycling ***,a hybrid asymmetric supercapacitor(HASC)device based on Ni_(6)Co_(6)Se@NiTe exhibits a favorable rate capability and reaches a high energy density of 67.7 Wh kg^(-1)and a power density of 724.8 W kg^(-1)with an exceptional capacity retention of 92.4%after sequential 12000 cycles at 5 A g^(-1).

关键词： bifunctional Ni_(x)Co_(12-x)Se@NiTe core-shell electrodeposition heterointerfaces supercapacitors UOR

Study on the four Qi of pfaffia glomerata based on the metabolomics technology and comparison of Dangshen(Radix Codonopsis) in the equivalent substitution prescription

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Journal of Traditional Chinese Medicine 2024年第4期44卷 713-721页

作者： SONG Zhenguang YANG Bin WANG Fei YAN Dongmei ZHOU Xiaoqing huang Liping GAO Xuemei LI Bin huang Luqi Academician Workstation Jiangxi University of Chinese MedicineNanchang 330004China State Key Laboratory of Characteristic Chinese Medicine Resources in Southwest China School of PharmacyChengdu University of Traditional Chinese MedicineChengdu 610075China National Resource Center for Chinese Materia Medica Chinese Academy of Chinese Medical Sciences(CACMS)Beijing 100700China

OBJECTIVE:To explore the four Qi of pfaffia glomerata(pG)and endow this foreign folk herb with the properties of Chinese medicine,make it Chinese medicinal and localized,and could be used as a Chinese ***:The normal group,six cold herb groups,six hot herb groups,six cool herb groups,pG prescription group(pGpG),and Dangshen(Radix Codonopsis)prescription group(CppG)were prepared with corresponding concentrations of water extracts,these herb extracts were administered by gavage to SpragueDawley rats,and the 12 h urine at night on the 29th day of the SD rats in each group were collected,Liquid Chromatograph Mass Spectrometer system was used to analyze them,the best discriminant models for the medicinal properties of cold-hot and cold-cool were set up,so as to the medicinal properties of pGpG,CppG and pG were *** on the progenesis QI,Human Metabolome Database,Kyoto Encyclopedia of Genes and Genomes,MetaboAnalyst 5.0 database,we enriched metabolic pathway and classification mechanism of medicinal properties of cold-cool Chinese herbs and the molecular mechanism of pG ***:We established a best model of cold-hot herbal discrimination in the positive ion mode,then the probability that pGpG was predicted cold property was 88.9%.Furthermore,a model of cold-cool herbal discrimination was established,then the probability of pGpG containing the cool property was 77.8%.In addition,typical cold and cool herbs mainly affected nine biomarkers such as tyrosine-proline,(R)-3',7-Dihydroxy-2',4'-dimethoxyisoflavane in *** regulation trend of pGpG on markers was basically as same as the cool herbs and mainly involved in regulating the two pathways of cytochrome p450 and purine ***:The results showed pGpG had a cool medicinal property as same as CppG,and the regulation trend of pGpG on markers was consistent with cool ***,the medicine properties pG and Cp should be consistent,and the Traditional Chinese Medicine p

关键词： pfaffia glomerata medicinal properties of Chinese medicine metabolomics molecular mechanism equivalent substitution

Intermolecular Acid-Base-pairs Containing poly(p-Terphenyl-co-Isatin piperidinium) for High Temperature proton Exchange Membrane Fuel Cells

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Energy & Environmental Materials 2024年第3期7卷 410-418页

作者： Xiaofeng Hao Zhen Li Min Xiao Zhiheng huang Dongmei Han Sheng huang Wei Liu Shuanjin Wang Yuezhong Meng The Key Laboratory of Low-carbon Chemistry & Energy Conservation of Guangdong province State Key Laboratory of Optoelectronic Materials and TechnologiesSchool of Materials Science and EngineeringSun Yat-sen University School of Chemical Engineering and Technology Sun Yat-sen University Institute of Chemistry Henan Provincial Academy of Sciences Research Center of Green Catalysts College of ChemistryZhengzhou University

How to optimize and regulate the distribution of phosphoric acid in matrix,and pursuing the improved electrochemical performance and service lifetime of high temperature proton exchange membrane （HT-pEMs） fuel cell are significant ***,bifunctional poly （p-terphenyl-co-isatin piperidinium） copolymer with tethered phosphonic acid （t-pA） and intrinsic tertiary amine base groups are firstly prepared and investigated as *** distinctive architecture of the copolymer provides a well-designed platform for rapid proton *** not only transports through the hydrogen bond network formed by the adsorbed free phosphoric acid （f-pA）anchored by the tertiary amine base groups,but also rely upon the proton channel constructed by the ionic cluster formed by the t-pA *** the design of the structure,the bifunctional copolymers with lower pA uptake level （play prominent proton conductivities and peak power densities (99 mS cm-1,812 mW cm-2at 160℃),along with lower pA leaching and higher voltage stability,which is a top leading result in disclosed *** results demonstrate that the design of intermolecular acid-base-pairs can improve the proton conductivity without sacrificing the intrinsic chemical stability or mechanical property of the thin membrane,realizing win-win demands between the mechanical robustness and electrochemical properties of HT-pEMs.

关键词： bifunctional copolymer high temperature proton exchange membrane intermolecular acid–base-pairs phosphonic acid retention phosphonic acid uptake level

Absorbed Bioactive Compounds Replicate GuanxinⅡ-Induced Endothelium-Associated in/ex vivo Vasodilation

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Chinese Journal of Integrative Medicine 2024年第5期30卷 387-397页

作者： XU Min LIU Hao SU Meng-qing LI Lan YU Ai-ling CHEN Ken huang Yun-ke ZHAO Qiu-long huang Wen-ya huang Xi Institute of Traditional Chinese Medicine Related Comorbid Depression Nanjing University of Chinese MedicineNanjing 210029China Department of Gynecology Women's HospitalZhejiang University School of MedicineHangzhou 310053China

Objective:To develop an interference-free and rapid method to elucidate GuanxinⅡ(GXⅡ)'s representative vasodilator absorbed bioactive compounds(ABCs)among enormous ***:The contents of ferulic acid,tanshinol,and hydroxysafflor yellow A(FTA)in GXⅡ/rat serum after the oral administration of GXⅡ(30 g/kg)were detected using ultra-performance liquid chromatography-mass *** 18 rats were randomly assigned to the control group(0.9%normal saline),GXⅡ(30 g/kg)and FTA(5,28 and 77 mg/kg)by random number table *** coronary flow velocity-time integral(VTI),i.e.,coronary flow or coronary flow-mediated dilation(CFMD),and endothelium-intact vascular tension of isolated aortic rings were *** 12 h of exposure to blank medium or 0.5 mmol/L H_(2)O_(2),endothelial cells(ECs)were treated with post-dose GXⅡof supernatant from deproteinized serum(pGSDS,300μL pGSDS per 1 m L of culture medium)or FTA(237,1539,and 1510 mg/m L)for 10 min as control,H_(2)O_(2),pGSDS and FTA *** oxide(NO),vascular endothelial growth factor(VEGF),endothelin-1(ET-1),superoxide dismutase(SOD),malondialdehyde(MDA)and phosphorylated phosphoinositide 3 kinase(p-pI3K),phosphorylated protein kinase B(p-AKT),phosphorylated endothelial nitric oxide synthase(p-e NOS)were *** was developed as a GXⅡproxy of ex vivo herbal crude ***:pGSDS effectively eliminates false responses caused by crude GXⅡ*** doses equaled the contents in GXⅡ/its post-dose serum,FTA accounted for 98.17%of GXⅡ-added CFMD and 92.99%of pGSDS-reduced vascular *** ECs,FTA/pGSDS was found to have significant antioxidant(lower MDA and higher SOD,pprotective(lower VEGF,ET-1,pphosphorylated pI3K/Akt/e NOS protein induced by FTA/pGSDS were markedly abolished by NG-nitro-L-arginine methyl ester(L-NA,e NOS inhibitor)and wortmannin(pI3K/AKT inhibitor

关键词： ultra-performance liquid chromatography-mass spectrometry endothelium-dependent vasodilation herbal extract GuanxinⅡ absorbed bioactive compound