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Selective CO_(2)Electroreduction to Multi-Carbon Products on Organic-Functionalized CuO Nanoparticles by Local Micro-Environment Modulation

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Nano-Micro Letters 2024年第12期16卷 120-132页

作者： Shan Ren Xi Cao Qikui Fan Zhimao yang Fei Wang Xin Wang Licheng Bai Jian yang Materials Interfaces Center Shenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen 518055GuangdongPeople’s Republic of China Key Laboratory of Functional Molecular Solids Ministry of EducationCollege of Chemistry and Materials ScienceAnhui Normal UniversityWuhu 241002AnhuiPeople’s Republic of China School of Physics Xi’an Jiaotong UniversityXi’an 710049ShaanxiPeople’s Republic of China College of Materials Science and Engineering Shenzhen UniversityShenzhen 518071GuangdongPeople’s Republic of China

Surface functionalization of Cu-based catalysts has demonstrated promising potential for enhancing the electrochemical CO_(2)reduction reaction(CO_(2)RR)toward multi-carbon(C2+)products,primarily by suppressing the parasitic hydrogen evolution reaction and facilitating a localized CO_(2)/CO concentration at the *** upon this approach,we developed surface-functionalized catalysts with exceptional activity and selectivity for electrocatalytic CO_(2)RR to C_(2+)in a neutral *** CuO nanoparticles coated with hexaethynylbenzene organic molecules(HEB-CuO NPs),a remarkable C_(2+)Faradaic efficiency of nearly 90%was achieved at an unprecedented current density of 300 mA cm^(-2),and a high FE(>80%)was maintained at a wide range of current densities(100-600 mA cm^(-2))in neutral environments using a flow ***,in a membrane electrode assembly(MEA)electrolyzer,86.14%FEC2+was achieved at a partial current density of 387.6 mA cm^(-2)while maintaining continuous operation for over 50 h at a current density of 200 mA cm^(-2).In-situ spectroscopy studies and molecular dynamics simulations reveal that reducing the coverage of coordinated K⋅H2O water increased the probability of intermediate reactants(CO)interacting with the surface,thereby promoting efficient C-C coupling and enhancing the yield of C_(2+)*** advancement offers significant potential for optimizing local micro-environments for sustainable and highly efficient C_(2+)production.

关键词： CO_(2)electroreduction to C_(2+) Neutral electrolyte Organic-functionalized CuO nanoparticles Local micro-environment

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Evolutionary impacts of purine metabolism genes on mammalian oxidative stress adaptation

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Zoological Research 2022年第2期43卷 241-254页

作者： Ran Tian Chen yang Si-Min Chai Han Guo Inge Seim Guang yang Jiangsu Key Laboratory for Biodiversity and Biotechnology College of Life SciencesNanjing Normal UniversityNanjingJiangsu 210023China Integrative Biology Laboratory College of Life SciencesNanjing Normal UniversityNanjingJiangsu 210023China School of Biology and Environmental Science Queensland University of TechnologyBrisbaneQueensland 4001Australia

Many mammals risk damage from oxidative stress stemming from frequent dives(i.e., cycles of ischemia/reperfusion and hypoxia/reoxygenation),high altitude and subterranean environments, or powered flight. Purine metabolism is an essential response to oxidative stress, and an imbalance between purine salvage and de novo biosynthesis pathways can generate damaging reactive oxygen species(ROS). Here, we examined the evolution of 117 purine metabolism-related genes to explore the accompanying molecular mechanisms of enhanced purine metabolism in mammals under high oxidative stress. We found that positively selected genes,convergent changes, and nonparallel amino acid substitutions are possibly associated with adaptation to oxidative stress in mammals. In particular, the evolution of convergent genes with c AMP and c GMP regulation roles may protect mammals from oxidative damage. Additionally, 32 genes were identified as under positive selection in cetaceans, including key purine salvage enzymes(i.e., HPRT1), suggesting improved re-utilization of non-recyclable purines avoid hypoxanthine accumulation and reduce oxidative stress. Most intriguingly, we found that six unique substitutions in cetacean xanthine dehydrogenase(XDH), an enzyme that regulates the generation of the ROS precursor xanthine oxidase(XO) during ischemic/hypoxic conditions, show enhanced enzyme activity and thermal stability and diminished XO conversion activity. These functional adaptations are likely beneficial for cetaceans by reducing radical oxygen species production during diving. In summary, our findings offer insights into the molecular and functional evolution of purine metabolism genes in mammalian oxidative stress adaptations.

关键词： Evolution Mammals Cetaceans Purine metabolism Oxidative stress

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A Ruin Model with Random Income and Dependence between Claim Sizes and Claim Intervals

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Acta Mathematicae Applicatae Sinica 2010年第4期26卷 625-632页

作者： Hu yang Yuan-yuan Hao College of Mathematics and Statistics Chongqing UniversityChongqing400030China

In this paper,we consider a generalization of the classical ruin model,where the income is random and the distribution of the time between two claim occurrences depends on the previous claim *** model is more appropriate than the classical ruin *** expression for the generating function of the Gerber-Shiu expected discounted penalty function are derived.A similar model is ***,the result are showed by two examples.

关键词： Ruin model expected discounted penalty function dependence ruin probability

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The Journal of China Universities of Posts and Telecommunications 2007年第3期14卷 16-21页

作者： yang Fan LI Dao-ben School of Information Engineering Beijing University of Posts andTelecommunications Beijing 100876 China

A more accurate correlated multiple input and multiple output （MIMO） channel model for IEEE 802.16n is presented. On one hand, this MIMO channel model can obtain more precise antenna correlation, which is a key character for MIMO channel and important for the research of IEEE 802.16n and MIMO technologies. On the other hand, it maintains a low complexity of simulation.

关键词： MIMO channel model power delay profile antenna correlation

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An Almost Sure Central Limit Theorem for Self-normalized Weighted Sums

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Acta Mathematicae Applicatae Sinica 2013年第1期29卷 79-92页

作者： Yong ZHANG Xiao-yun yang College of Mathematics Jilin University

Let X, X1, X2, be a sequence of nondegenerate i.i.d, random variables with zero means, which is in the domain of attraction of the normal law. Let （ani, 1 ≤ i ≤n,n ≥1} be an array of real numbers with some suitable conditions. In this paper, we show that a central limit theorem for self-normalized weighted sums holds. We also deduce a version of ASCLT for self-normalized weighted sums.

关键词： almost sure central limit theorem self-normalized weighted sums domain of attractio of thenormal law

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Nonlinear density fluctuation field theory for large scale structure

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Chinese Journal of Astronomy and Astrophysics 2009年第5期9卷 501-508页

作者： yang Zhang Hai-Xing Miao Key Laboratory of Galactic and Cosmological Research Center for Astrophysics University of Science and Technology of China Hefei 230026 China

We develop an effective field theory of density fluctuations for a Newtonian self-gravitating N-body system in quasi-equilibrium and apply it to a homogeneous universe with small density fluctuations. Keeping the density fluctuations up to second or- der, we obtain the nonlinear field equation of 2-pt correlation ξ（r）, which contains 3-pt correlation and formal ultra-violet divergences. By the Groth-Peebles hierarchical ansatz and mass renormalization, the equation becomes closed with two new terms beyond the Gaussian approximation, and their coefficients are taken as parameters. The analytic solution is obtained in terms of the hypergeometric functions, which is checked numerically. With one single set of two fixed parameters, the correlation ξ（r） and the corresponding power spectrum P（k） simultaneously match the results from all the major surveys, such as APM, SDSS, 2dfGRS, and REFLEX. The model gives a unifying understanding of several seemingly unrelated features of large scale structure from a field-theoretical perspective. The theory is worth extending to study the evolution effects in an expanding universe.

关键词： cosmology large-scale structure-- cosmology theory -- galaxies clusters general -- gravitation --- hydrodynamics -- instabilities

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作家的边缘立场与批判功能——兼论文学创作中历史与道德的几种关系模式

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探索与争鸣 2011年第1期 64-68页

作者：陶东风首都师范大学诗歌研究中心首都师范大学文学院

一个时代健康的精神环境,应当是包含各种不同甚至对立的生活方式、思想潮流、价值取向多元并存、相互制衡、良性互补的环境。人文知识分子特别是作家艺术家的使命,就是以自己的特殊精神劳动,自己的批判话语,促成这种环境的形成。人文科... 详细信息

一个时代健康的精神环境,应当是包含各种不同甚至对立的生活方式、思想潮流、价值取向多元并存、相互制衡、良性互补的环境。人文知识分子特别是作家艺术家的使命,就是以自己的特殊精神劳动,自己的批判话语,促成这种环境的形成。人文科学特别是文学艺术的自主性、独立性,表现为对处于中心地位的政治、经济和主导意识形态保持必要的张力,不但不一味依附它,相反,要审视、反思它们在实践中所产生的效果,发出自己的警醒的声音、批判的声音,从而发挥制衡作用,促进时代文化的健康的精神环境的形成,促进人的全面发展。

关键词：作家边缘立场批判功能历史尺度道德尺度

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Multicomponent SF6 decomposition product sensing with a gas-sensing microchip

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Microsystems & Nanoengineering 2021年第2期7卷 35-50页

作者： Jifeng Chu Aijun yang Qiongyuan Wang Xu yang Dawei Wang Xiaohua Wang Huan Yuan Mingzhe Rong State Key Laboratory of Electrical Insulation and Power Equipment Xi’an Jiaotong University710049Xi’anChina

A difficult issue restricting the development of gas sensors is multicomponent recognition. Herein, a gas-sensing (GS) microchip loaded with three gas-sensitive materials was fabricated via a micromachining technique. Then, a portable gas detection system was built to collect the signals of the chip under various decomposition products of sulfur hexafluoride (SF6). Through a stacked denoising autoencoder (SDAE), a total of five high-level features could be extracted from the original signals. Combined with machine learning algorithms, the accurate classification of 47 simulants was realized, and 5-fold cross-validation proved the reliability. To investigate the generalization ability, 30 sets of examinations for testing unknown gases were performed. The results indicated that SDAE-based models exhibit better generalization performance than PCA-based models, regardless of the magnitude of noise. In addition, hypothesis testing was introduced to check the significant differences of various models, and the bagging-based back propagation neural network with SDAE exhibits superior performance at 95% confidence.

关键词： technique. generalization testing

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Gold nanoparticles functionalized with supramolecular macrocycles

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Chinese Chemical Letters 2013年第7期24卷 545-552页

作者： Hui Li Ying-Wei yang State Key Laboratory of Supramolecular Structure and Materials College of Chemistry.Jilin University

Gold nanoparticles （AuNPs） functionalized with supramolecular macrocycles are versatile and diverse hybrid nanomaterials, which combine and enhance the characteristics of the two components. In this mini-review, we summarize the recent research progress on the synthesis and assembly of AuNPs functionalized with different supramolecular macrocyclic compounds, i.e., crown ethers, cyclophanes, cyclodextrins （CDs）, cucurbit[n]urils （CB[n]）, calix[n]arenes, and pillar[n]arenes （PIn]A）. Meanwhile, applications of these supramolecular hybrid nanomaterials in the fields of sensors, biomedicine and plasmonic devices are also presented.

关键词： Supramolecular macrocycles Au nanoparticles Synthesis Assembly Nanomaterials

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Risk of asthma in preterm infants with bronchopulmonary dysplasia: a systematic review and meta‑analysis

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World Journal of Pediatrics 2023年第6期19卷 549-556页

作者： Tong Sun Hai-yang Yu Miao yang Yi-Fan Song Jian-Hua Fu Department of Pediatrics Shengjing Hospital of China Medical UniversitySanhao StreetHeping DistrictShenyangChina Department of Neurology Shengjing Hospital of China Medical UniversityShenyangChina

Background This study aimed to systematically review and meta-analyze the available literature on the association between preterm infant bronchopulmonary dysplasia(BPD)and pre-adulthood *** Studies examining the association between BPD and asthma in children and adolescents were systematically reviewed,and a meta-analysis was *** searched Scopus,Embase,Web of Science,PubMed,and Cochrane Library from the database inception to March 26,*** pooled odds ratio(OR)estimate was used in our meta-analysis to calculate the correlation between BPD and the probability of developing asthma before *** 12.0 was used to conduct the statistical *** The correlation between asthma and BPD in preterm newborns was examined in nine *** used a random effect model to pool the OR *** results indicated a marked increase in the risk of subsequent asthma in preterm infants with BPD[OR=1.73,95% confidence interval(CI)=1.43-2.09].Moreover,there was no obvious heterogeneity across the studies(P=0.617,I^(2)=0%).The pooled OR remained stable and ranged from 1.65(95%CI=1.35-2.01)to 1.78(95%CI=1.43-2.21).Regarding publication bias,the funnel plot for asthma risk did not reveal any noticeable *** further performed Begg’s and Egger’s tests to quantitatively evaluate publication *** was no evidence of a publication bias for asthma risk(P>|Z|=0.602 for Begg’s test,and P>|t|=0.991 for Egger’s test).Conclusions Our findings indicate that preterm infants with BPD have a much higher risk of developing asthma in the future(OR=1.73,95%CI=1.43-2.09).Preterm infants with BPD may benefit from long-term follow-up.

关键词： Asthma Bronchopulmonary dysplasia Preterm infants

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