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Building Simulation 2024年第7期17卷 1213-1229页

作者： qiao deng Zhiwen Chen Wanting Zhu Zefan Li Yifeng Yuan Weihua Gui School of Automation Central South UniversityChangsha 410083China Xiangjiang Laboratory of Hunan Province Changsha 410205China Shenzhen DAS Intellitech Co. Ltd.Shenzhen 518057China

Accurately predicting the chiller coefficient of performance(COP)is essential for improving the energy efficiency of heating,ventilation,and air conditioning(HVAC)systems,significantly contributing to energy conservation in *** performance prediction methods often overlook the dynamic interaction among sensor variables and face challenges in using extensive historical data efficiently,which impedes accurate *** overcome these challenges,this paper proposes an innovative on-site chiller performance prediction method employing a dynamic graph convolutional network(GCN)enhanced by association *** distinctive feature of this method is constructing an association graph bank containing static graphs in each operating mode by mining the association rules between various sensor variables in historical operating data.A real-time graph is created by analyzing the correlation between various sensor variables in the current operating *** graph is fused online with the static graph in the current operating mode to obtain a dynamic graph used for feature extraction and training of *** effectiveness of this method has been empirically confirmed through the operational data of an actual building chiller *** analysis with state-of-the-art methods highlights the superior performance of the proposed method.

关键词： chillers performance prediction dynamic graph convolutional network association rules operating modes

Metallosalen covalent organic frameworks for heterogeneous catalysis

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Interdisciplinary Materials 2024年第1期3卷 87-112页

作者： Wei Zhou Wei‐qiao deng Xing Lu School of Chemistry and Chemical Engineering Hainan UniversityHaikouHainanChina Institute of Molecular Sciences and Engineering Shandong UniversityQingdaoShandongChina

Metallosalen covalent organic frameworks(M(salen)-COFs)have garnered significant attention as promising candidates for advanced heterogeneous catalysis,including organocatalysis,electrocatalysis,and photocatalysis,due to their unique structural advantages(combining molecules catalysts and crystalline porous materials)and tunable topological *** is essential to provide a comprehensive overview of emerging designs of M(salen)-COFs and corresponding advances in this ***,this review first summarizes the reported metallolinkers and the synthesis methods of M(salen)-*** addition,the review enumerates the excellent M(salen)-COF based heterogeneous catalysts and discusses the fundamental mechanisms behind the outstanding heterogeneous catalytic performance of M(salen)-*** mechanisms include the pore enrichment effect(enhancing local concentration within porous materials to promote catalytic reactions),the three-in-one strategy(integrating enrichment,reduction,and oxidation sites in one system),and the incorporation of a built-in electric field(implanting a built-in electric field in heterometallic phthalocyanine covalent organic frameworks).Furthermore,this review discusses the challenges and prospects related to M(salen)-COFs in heterogeneous catalysis.

关键词： covalent organic frameworks heterogeneous catalysis metallosalen

Enhanced nitrite electroreduction to ammonia via interfacial dual-site adsorption

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Journal of Energy Chemistry 2024年第9期96卷 328-335页

作者： Xiaokang Chen Shengliang Zhai Yi Tan Le Su Dong Zhai Wei-qiao deng Hao Wu Institute of Frontier Chemistry School of Chemistry and Chemical EngineeringShandong UniversityQingdao 266071ShandongChina College of Physics and Information Engineering Shanxi Normal UniversityTaiyuan 030031ShanxiChina Suzhou Research Institute of Shandong University Suzhou 215123JiangsuChina

The nitrite(NO_(2)^(−))to ammonia(NH3)electroreduction reaction(NO_(2)^(−)RR)would be impeded by sluggish proton-coupled electron transfer kinetics and competitive hydrogen evolution reaction(HER).A key to improving the NH_(3) selectivity is to facilitate adsorption and activation of NO_(2)^(−),which is generally undesirable in unitary *** this work,an efficient NO_(2)^(−)RR catalyst is constructed by cooperating Pd with In2O3,in which NO_(2)^(−)could adsorb on interfacial dual-site through“Pd–N–O–In”linkage,leading to strengthened NO_(2)^(−)adsorption and easier N=O bond cleavage than that on unitary Pd or ***,the Pd/In_(2)O_(3)composite exhibits moderate H^(*)adsorption,which may facilitate protonation kinetics while inhibiting competitive *** a result,it exhibits a fairly high NH_(3)yield rate of 622.76 mmol h^(−1)g^(−1)cat with a Faradaic efficiency(FE)of 95.72%,good selectivity of 91.96%,and cycling stability towards the NO_(2)^(−)RR,surpassing unitary In_(2)O_(3)and Pd/C ***,computed results indicate that NH_(3)production on Pd/In_(2)O_(3)follows the deoxidation to hydrogenation *** work highlights the significance of H^(*)and NO_(2)^(−)adsorption modulation and N=O activation in NO_(2)^(−)RR electrochemistry by creating synergy between a mediocre catalyst with an appropriate cooperator.

关键词： Dual-site adsorption Nitrite electroreduction Ammonia Pd Hydrogenation

Heteroatom doping regulates the catalytic performance of singleatom catalyst supported on graphene for ORR

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Nano Research 2024年第3期17卷 1086-1093页

作者： Ji-Kai Sun Yu-Wei Pan Meng-Qian Xu Lei Sun Shaolong Zhang Wei-qiao deng Dong Zhai Institute of Molecular Sciences and Engineering Institute of Frontier and Interdisciplinary ScienceShandong UniversityQingdao 266237China College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen 518060China

Replacing fossil fuels with fuel cells is a feasible way to reduce global energy shortages and environmental ***,the oxygen reduction reaction(ORR)at the cathode has sluggish kinetics,which limits the development of fuel *** is significant to develop catalysts with high catalytic activity of *** single-atom catalysts(SACs)of Pt supported on heteroatom-doped graphene are potential candidates for *** we studied the SACs of Pt with different heteroatoms doping and screened out Pt-C_(4) and Pt-C_(3)O_(1) structures with only 0.13 V overpotential for ***,it is found that B atoms doping could weaken the adsorption capacity of Pt,while N or O atoms doping could enhance *** regularity was verified on Fe *** the electronic interaction analysis between Pt and adsorbate,we explained the mechanism of this regularity and further proposed a new descriptor named corrected d-band center(ε_(d-corr))to describe *** descriptor is an appropriate reflection of the number of free electrons of the SACs,which could evaluate its adsorption *** work provides a purposeful regulatory strategy for the design of ORR catalysts.

关键词： single-atom catalyst(SAC) oxygen reduction reaction(ORR) heteroatom doping corrected d-band center descriptor

不同形貌碳基纳米材料的添加对冷冻机油摩擦学性能的影响

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机械工程材料 2024年第7期48卷 34-40页

作者：邓巧邢美波孙非凡王瑞祥北京建筑大学环境与能源工程学院北京市建筑能源高效综合利用工程中心北京100044

在冷冻机油中添加零维球形富勒烯(CB)、一维碳纳米管(CNTs)、二维层状石墨烯(GE)3种不同形貌的碳基纳米材料制备纳米冷冻机油,研究了在含不同质量分数(0.01%~0.10%)碳基纳米材料冷冻机油润滑条件下钢球-钢盘摩擦副的摩擦因数以及钢盘磨... 详细信息

在冷冻机油中添加零维球形富勒烯(CB)、一维碳纳米管(CNTs)、二维层状石墨烯(GE)3种不同形貌的碳基纳米材料制备纳米冷冻机油,研究了在含不同质量分数(0.01%~0.10%)碳基纳米材料冷冻机油润滑条件下钢球-钢盘摩擦副的摩擦因数以及钢盘磨损行为。结果表明:随着碳基纳米材料添加量的增加,平均摩擦因数呈先降低后升高的趋势,磨损体积基本呈先升后降再升的趋势。当零维球形CB、一维CNTs、二维层状GE的质量分数分别为0.02%,0.05%,0.02%时,摩擦副的平均摩擦因数最小,分别比纯冷冻机油润滑条件下减小了约10%,12%,12%,零维球形CB降低摩擦因数的能力较弱,而一维CNTs和二维层状GE的能力较强,且较低含量二维层状GE可以达到较高含量一维CNTs的减摩效果。当零维球形CB、一维CNTs、二维层状GE的质量分数分别为0.02%,0.03%~0.05%,0.02%~0.05%时,磨损体积均最小,分别比纯冷冻机油润滑条件下减小了约59%,8%,36%。二维层状GE的综合减摩效果最佳,在添加GE的冷冻机油润滑条件下摩擦副的摩擦因数变化最平稳,磨损体积较小。

关键词：纳米冷冻机油富勒烯石墨烯碳纳米管摩擦因数磨损体积

腺病毒相关肝损伤患儿的临床特征及其影响因素

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肝脏 2024年第5期29卷 576-580页

作者：秦攸余邓巧妮宁南县人民医院儿科四川615400 宝鸡高新医院儿科陕西721700

目的了解腺病毒相关肝损伤患儿的临床特征及其影响因素。方法2019年4月至2023年4月宁南县人民医院收治的腺病毒感染患儿572例,其中肝损伤组236例,非肝损伤组336例。比较两组患儿的临床资料,多因素logistic回归分析腺病毒相关肝损伤患儿... 详细信息

目的了解腺病毒相关肝损伤患儿的临床特征及其影响因素。方法2019年4月至2023年4月宁南县人民医院收治的腺病毒感染患儿572例,其中肝损伤组236例,非肝损伤组336例。比较两组患儿的临床资料,多因素logistic回归分析腺病毒相关肝损伤患儿的危险因素。结果肝损伤组患儿男性、重症肺炎、胃肠炎、喘息、气促、呼吸困难、心力衰竭、混合感染比例分别为64.0%、19.1%、8.1%、37.3%、27.5%、20.3%、10.6%、53.0%,高于非肝损伤组的55.1%、12.5%、3.9%、25.6%、18.8%、12.8%、6.0%、42.3%;肝损伤组年龄、C反应蛋白(CRP)、降钙素原(PCT)、IL-6、ALT、AST、TBil、γ-谷氨酰转肽酶(GGT)、乳酸脱氢酶(LDH)和住院时间分别为(2.8±1.0)岁、(28.6±4.4)mg/L、(1.7±0.4)ng/mL、(78.4±20.8)pg/mL、(75.7±25.2)U/L、(162.3±45.6)U/L、(5.6±2.1)μmol/L、(18.1±10.3)U/L、(645.2±501.2)U/L和(10.5±2.3)d,高于非肝损伤组的(3.1±1.1)岁、(25.3±3.8)mg/L、(1.2±0.2)ng/mL、(36.5±16.3)pg/mL、(46.8±12.5)U/L、(124.6±40.3)U/L、(4.9±2.3)μmol/L、(12.4±8.6)U/L、(354.6±98.7)U/L和(8.1±1.6)d;肝损伤组支气管炎比例、Hb、IL-10分别为29.7%、(114.8±12.1)g/L、(1.08±0.4)pg/mL,低于非肝损伤组的30.1%、(119.4±10.5)g/L、(2.3±0.5)pg/mL,差异均有统计学意义(P<0.05)。重症肺炎[OR(95%CI):2.563(1.112~5.906)]、GGT[OR(95%CI):1.982(1.054~3.725)]、LDH[OR(95%CI):2.100(1.056~4.179)]是患儿发生肝损伤的独立危险因素。结论腺病毒相关肝损伤以年龄低的男性患儿常见,重症肺炎患儿肝损伤发生率高,临床症状以发热为主,重症肺炎、GGT、LDH是腺病毒相关肝损伤的影响因素。

关键词：腺病毒肝损伤临床特征影响因素儿童

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矿渣电石渣基地聚合物固化土力学特性及微观机理分析

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河南科学 2024年第10期42卷 1434-1442页

作者：任超邓乔吕浩武靖浙江公路水运工程咨询集团有限公司杭州310012 河海大学岩土力学与堤坝工程教育部重点实验室南京210098 河海大学苏州研究院江苏苏州215000

通过以矿渣和电石渣为碱激发原料、硅酸钠为碱激发剂形成的地聚合物(GCG)固化淤泥来实现工业固废以及废弃土的资源化利用.通过无侧限抗压强度(UCS)试验研究了固化剂组分、养护龄期和含水率对GCG固化土强度的影响规律,并通过扫描电镜试验... 详细信息

通过以矿渣和电石渣为碱激发原料、硅酸钠为碱激发剂形成的地聚合物(GCG)固化淤泥来实现工业固废以及废弃土的资源化利用.通过无侧限抗压强度(UCS)试验研究了固化剂组分、养护龄期和含水率对GCG固化土强度的影响规律,并通过扫描电镜试验(SEM)探究了其微观机理.试验结果表明:矿渣与电石渣的最佳配比为6.5∶3.5;当固化剂掺量大于10%时,固化土UCS值大幅提升,最大28 d UCS值为8.86 MPa;当碱激发剂掺量增加时,固化土UCS值先增大后减小,存在最优掺量7.5%;28 d固化土强度在7~14 d时增长速率较大,在其他龄期下增长速率较小;当初始含水率由30%增长至60%时,不同固化剂掺量下的固化土28 d UCS值降低了57.1%~92.5%;固化剂掺入7 d后在固化土体能产生更多的胶结物,使土体结构更加致密.

关键词：软土地基处理地聚合物矿渣电石渣无侧限抗压强度微观机理

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密花美登木化学成分及抗肿瘤活性研究

中药材 2024年第1期47卷 96-101页

作者：贾学恭黄园园张雯艳梁旭邓富声邓巧玉袁经权广西中医药大学科学实验中心广西南宁530200

目的:研究卫矛科美登木属植物密花美登木Maytenus confertiflora *** et ***茎叶的化学成分及其体外抗肿瘤活性。方法:采用正相硅胶、Sephadex LH-20葡聚糖凝胶、MCI以及Semi-Prep HPLC对密花美登木醇提物进行分离纯化,并采用MTT法对三... 详细信息

目的:研究卫矛科美登木属植物密花美登木Maytenus confertiflora *** et ***茎叶的化学成分及其体外抗肿瘤活性。方法:采用正相硅胶、Sephadex LH-20葡聚糖凝胶、MCI以及Semi-Prep HPLC对密花美登木醇提物进行分离纯化,并采用MTT法对三萜化合物进行体外抗肿瘤活性评价。结果:从密花美登木中分离得到17个化合物,分别鉴定为:tridec-1-ene(1)、bis(2-ethylhexyl)phthalate(2)、二十五烷(3)、β-amyrenone(4)、3-hydroxyfriedel-3-en-2-one(5)、β-谷甾醇(6)、28,29-dihydroxyfriedelan-3-one(7)、friedelin(8)、3α-hydroxyfriedel-2-one(9)、3-oxofriedelan-28-oic acid(10)、canophyllol(11)、3-oxo-29-hydroxyfiedelane(12)、pentadecanoic acid(13)、华中冬青素(14)、lingueresinol(15)、飞龙掌血内酯(16)、橙黄胡椒酰胺乙酸酯(17)。结论:所有化合物均为首次从该植物中分离得到。化合物7对Eca-109、EJ细胞具有较强抑制作用,其IC_(50)分别为27.67、30.09μmol/L;化合物12对HepG_(2)、PANC-1细胞均具有较好的抑制作用,其IC_(50)分别为49.42、51.87μmol/L。

关键词：密花美登木化学成分三萜抗肿瘤活性

Vanadium-based compounds and heterostructures as functional sulfur catalysts for lithium-sulfur battery cathodes

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Journal of Energy Chemistry 2023年第11期86卷 118-134,I0003页

作者： Xinji Dong qiao deng Fengxing Liang Pei Kang Shen Jinliang Zhu Cheng Tang School of Resources Environment and MaterialsState Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite StructuresGuangxi UniversityNanning 530004GuangxiChina Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical EngineeringTsinghua UniversityBeijing 100084China

Lithium-sulfur(Li-S)batteries have attracted wide attention for their high theoretical energy density,low cost,and environmental ***,the shuttle effect of polysulfides and the insulation of active materials severely restrict the development of Li-S *** conductive sulfur scaffolds with catalytic conversion capability for cathodes is an efficient approach to solving above ***-based compounds and their heterostructures have recently emerged as functional sulfur catalysts supported on conductive *** compounds interact with polysulfides via different mechanisms to alleviate the shuttle effect and accelerate the redox kinetics,leading to higher Coulombic efficiency and enhanced sulfur *** on vanadium-based nanomaterials in Li-S batteries have been steadily increasing over the past several *** this review,first,we provide an overview of the synthesis of vanadium-based compounds and ***,we discuss the interactions and constitutive relationships between vanadium-based catalysts and polysulfides formed at sulfur *** summarize the mechanisms that contribute to the enhancement of electrochemical performance for various types of vanadium-based catalysts,thus providing insights for the rational design of sulfur ***,we offer a perspective on the future directions for the research and development of vanadium-based sulfur catalysts.

关键词： Vanadium-based compound Vanadium-based heterostructure Lithium-sulfur battery Sulfur catalyst Polysulfide regulation

Efficacy of pipeline endovascular device and Willis stent graft in the treatment of traumatic pseudo intracranial aneurysms

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Journal of Interventional Medicine 2020年第1期3卷 45-48页

作者： qiao deng Wen feng Feng Department of Neurosurgery Nanfang Hospital of Southern Medical UniversityGuangzhou510515China

Objective:To investigate the advantages and effects of pipeline embolization device(PED)or Willis stent,in treating traumatic *** pseudo intracranial aneurysms(TPIA)can be caused by either direct trauma or iatrogenic injuries,usually caused by direct arterial wall injury or shear due to *** describe a series of patients with TPIA who received a PED or Willis *** and methods:Retrospective analysis was performed on nine patients with TPIA admitted to the southern hospital of Southern Medical University from December 2017 to June 2019,of whom four were treated with PED and five were implanted with six Willis covered *** occlusive rate and complication in the two kinds of stents were compared by postoperative follow-up and modified rankin score(MRS).Results:After the implantation of PED,four patients showed an immediate stagnation of blood flow or a decreased filling in aneurysms,three out of four patients exhibited complete occlusion,and the remaining patient had nearly complete *** out of five cases of Willis stent implantation were associated with immediate complete occlusion of aneurysms,and the modified rankin score of these patients ranged from 0 to *** patient died of unassociated ***:For different types of TPIA in the internal carotid artery(ICA),PED and Willis stents provide significant advantages in treatment,with fewer postoperative complications and prognosis well.

关键词： Traumatic pseudo intracranial aneurysm Stent PED Willis stent Curative effect