检索结果-南通市图书馆

Efficient Pt/KFI zeolite catalysts for the selective catalytic reduction of NOxby hydrogen

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Environmental sciences 2024年第4期138卷 102-111页

作者： Ligang Zhang Yulong shan Zidi Yan Zhongqi Liu Yunbo Yu hong he school of Rare Earths University of Science and Technology of ChinaHefei 230026China Ganjiang Innovation Academy Chinese Academy of SciencesGanzhou 341119China state Key Joint Laboratory of Environment simulation and Pollution Control Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China

Aiming at purification of NO_(x)from hydrogen internal combustion engines(HICEs),the hydrogen selective catalytic reduction(H_(2)-sCR)reaction was investigated over a series of Pt/KFI zeolite catalysts.H_(2)can readily reduce NO_(x)to N_(2)and N_(2)O while O_(2)inhibited the deNO_(x)efficiency by consuming the reductant H_(2).The Pt/KFI zeolite catalysts with Pt loading below 0.1wt.% are optimized H_(2)-sCR catalysts due to its suitable operation temperature window since high Pt loading favors the H_(2)-O_(2)reaction which lead to the insufficient of *** to metal Pt^(0)species,Pt^(δ+)species showed lower activation energy of H_(2)-sCR reaction and thought to be as reasonable active ***,Eley-Rideal(E-R)reaction mechanism was proposed as evidenced by the reaction orders in kinetic ***,the optimized reactor was designed with hybrid Pt/KFI catalysts with various Pt loading which achieve a high NO_(x)conversion in a wide temperature range.

关键词： Pt/KFI zeolite Pt loading H_(2)-sCR Reaction conditions Kinetics studies

AZGP1P2/UBA1/RBM15 Cascade Mediates the Fate Determinations of Prostate Cancer stem Cells and Promotes Therapeutic Effect of Docetaxel in Castration-Resistant Prostate Cancer via TPM1 m6A Modification

在线全文

学校读者我要写书评

暂无评论

Research 2024年第3期6卷 151-167页

作者： hong Wang Jj Liu Xiaojun Zhu Bin Yang Zuping he Xudong Yao Department of Urology Shanghai Tenth People’s HospitalSchool of MedicineTongji UniversityShanghaiChina Urologic Cancer Institute School of MedicineTongji UniversityShanghaiChina. Department of Urology surgery The Affiliated Hospital of Inner Mongolia Medical UniversityHohhotChina. The Key Laboratory of Model Animals and stem Cell Biology in Hunan Province School of MedicineHunan Normal UniversityThe Engineering Research Center of Reproduction and Translational Medicine of Hunan ProvinceChangshaChina shanghai Key Laboratory of Reproductive Medicine Shanghai Jiao Tong University School of MedicineShanghaiChina.

Prostate cancer(PCa)is a common malignant tumor with high morbidity and mortality *** prostate cancer stem cell(PCsC)model provides novel insights into the pathogenesis of PCa and its therapeutic ***,the roles and molecular mechanisms of specific genes in mediating fate decisions of PCsCs and carcinogenesis of PCa remain to be *** this study,we have explored the expression,function,and mechanism of AZGP1P2,a pseudogene of AZGP1,in regulating the stemness and apoptosis of PCsCs and treatment resistance of docetaxel in castration-resistant prostate cancer(CRPC).We revealed that AZGP1P2 was downregulated in CRPC cell lines and PCsCs,while it was positively associated with progression-free *** of the AZGP1P2 enhanced the sensitivity of docetaxel treatment in CRPCs via inhibiting their *** pull-down associated with mass spectrometry analysis,co-immunoprecipitation assay,and RNA immunoprecipitation assay demonstrated that AZGP1P2 could bind to UBA1 and RBM15 as a“writer”of methyltransferase to form a ***1,an E1 ubiquitin-activating enzyme,contributed to RBM15 protein degradation via ubiquitination *** RNA immunoprecipitation assay displayed that RBM15 controlled the mRNA decay of TPM1 in m6A ***,a xenograft mouse model and patient-derived organoids showed that the therapeutic effect of docetaxel in CRPC was increased by AZGP1P2 in ***,these results imply that AZGP1P2 mediates the stemness and apoptosis of PCsCs and promotes docetaxel therapeutic effect by suppressing tumor growth and metastasis via UBA1/RBM15-mediated TPM1 mRNA decay in CRPC.

关键词： Prostate TPM1 m6A

Effects of impregnation sequence on the NH_(3)-sCR activity and hydrothermal stability of a Ce-Nb/snO_(2) catalyst

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Environmental sciences 2024年第4期138卷 450-457页

作者： Ying Zhu Wenpo shan Zhihua Lian Jingjing Liu Yan Zhang hong he Center for Excellence in Regional Atmospheric Environment and Key Laboratory of Urban Pollutant Conversion Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China Zhejiang Key Laboratory of Urban Environmental Processes and Pollution Control Ningbo Urban Environment Observation and Research StationInstitute of Urban EnvironmentChinese Academy of SciencesNingbo 315800China state Key Joint Laboratory of Environment simulation and Pollution Control Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of sciences Beijing 100049China

Hydrothermal stability is crucial for the practical application of deNO_(x)catalyst on diesel vehicles,for the selective catalytic reduction of NO_(x)with NH_(3)(NH_(3)-sCR).snO_(2)-based materials possess superior hydrothermal stability,which is attractive for the development of NH_(3)-sCR *** this work,a series of Ce-Nb/snO_(2)catalysts,with Ce and Nb loading on snO_(2)support,were prepared by impregnation *** was found that,the NH_(3)-sCR activities and hydrothermal stabilities of the Ce-Nb/snO_(2)catalysts significantly varied with the impregnation sequences,and the Ce-Nb(f)/snO_(2) catalyst that firstly impregnated Nb and then impregnated Ce exhibited the best *** characterization results revealed that CeNb(f)/snO_(2)possessed appropriate acidity and redox ***,the strong synergistic effect between Nb and sn species stabilized the structure and maintained the dispersion of acid *** study may provide a new understanding for the effect of impregnation sequence on activity and hydrothermal stability and a new environmental-friendly NH_(3)-sCR catalyst with potential applications for NO_(x)removal from diesel and hydrogenfueled engines.

关键词： NO_(x)emission control NH_(3)-sCR Hydrothermal stability Ce-Nb/snO_(2)catalyst Impregnation sequence

Channel assignment and power allocation for throughput improvement with PPO in B5G heterogeneous edge networks

在线全文

学校读者我要写书评

暂无评论

Digital Communications and Networks 2024年第1期10卷 109-116页

作者： Xiaoming he Yingchi Mao Yinqiu Liu Ping Ping Yan hong Han Hu The College of Computer and Information Hohai UniversityNanjingChina The Key Laboratory of Water Big Data Technology of Ministry of Water Resources Hohai UniversityNanjing China The school of Computer science and Engineering Nanyang Technological UniversitySingapore The College of Textile and Clothing Engineering Soochow UniversitySuzhouChina The College of Internet of Things Nanjing University of Posts and TelecomurunicationsNanjingChina

In Beyond the Fifth Generation(B5G)heterogeneous edge networks,numerous users are multiplexed on a channel or served on the same frequency resource block,in which case the transmitter applies coding and the receiver uses interference ***,uncoordinated radio resource allocation can reduce system throughput and lead to user inequity,for this reason,in this paper,channel allocation and power allocation problems are formulated to maximize the system sum rate and minimum user achievable *** the construction model is non-convex and the response variables are high-dimensional,a distributed Deep Reinforcement Learning(DRL)framework called distributed Proximal Policy Optimization(PPO)is proposed to allocate or assign ***,several simulated agents are trained in a heterogeneous environment to find robust behaviors that perform well in channel assignment and power ***,agents in the collection stage slow down,which hinders the learning of other ***,a preemption strategy is further proposed in this paper to optimize the distributed PPO,form DP-PPO and successfully mitigate the straggler *** experimental results show that our mechanism named DP-PPO improves the performance over other DRL methods.

关键词： B5G heterogeneous edge networks PPO Channel assignment Power allocation Throughput

study on the flow structure in curved open channels with suspended vegetation using multi relaxation time lattice Boltzmann method

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Hydrodynamics 2024年第2期36卷 300-315页

作者： he-fang Jing Qiao-ling Zhang Wei-hong Wang Zong-ning Zhang school of Mathematics and Information science North Minzu UniversityYinchuan750021China school of Civil Engineering North Minzu UniversityYinchuan750021China Department of Basic Courses Zhengzhou University of Science and TechnologyZhengzhou450064China

suspended vegetation in rivers,lakes,reservoirs and canals can change flow structure,which will in turn affect the sediment transport and cause the variation of water ecological *** order to study the characteristics of bend flow through suspended vegetation,three-dimensional numerical simulations are carried out by using the multi-relaxation-time lattice Boltzmann method(MRT-LBM).The drag force induced by vegetation is added in the velocity correction in the equilibrium distribution and a hybrid format combined bounce and specular reflection scheme is applied in the solid-fluid *** the validation of this model,six cases are designed to conduct the numerical simulations according to the root depth and the arrangement of *** simulated results show that the suspended vegetation can redistribute the flow structure in curved open *** the arrangement of suspended vegetation,the main flow moves to the side without vegetation,and the distribution of velocity tends to be balanced when vegetation is arranged on the entire cross section,the range of circulating current is reduced from the whole cross section to the local position without vegetation,however,the circulating current can still exist in the curve where the suspended vegetation enters less than half of the water *** addition,it can also be concluded that the suspended vegetation can affect the lateral gradient of flow velocity,and the bed shear stress in the curved channel.

关键词： Multi-relaxation-time lattice Boltzmann method(MRT-LBM) suspended vegetation curved open channel circulating current bed shearstress

Adsorptive interaction between typical VOCs and various topological zeolites:Mixture effect and mechanism

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Environmental sciences 2024年第2期136卷 626-636页

作者： Bo Yu Hua Deng Yuqin Lu Tingting Pan Wenpo shan hong he Center for Excellence in Regional Atmospheric Environment and Key Laboratory of Urban Pollutant Conversion Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China University of Chinese Academy of sciences Beijing 100049China state Key Joint Laboratory of Environment simulation and Pollution Control Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China

Adsorption is one of the most feasible and effective methods to alleviate the volatile organic compounds(VOCs)***,the mixture effect and mechanism for competitive adsorption of VOCs on zeolites are barely *** this study,toluene,acetone,and ethyl acetate as prevalent VOCs species were removed by four potential zeolites(13X,UsY,Beta,ZsM-5)in both single-and multi-component *** structure-property relationship between adsorbate-adsorbent pairs was revealed by X-ray diffraction,scanning electron microscopy,energy dispersive spectrometer,X-ray fluorescence,N_(2) adsorption and density function theory *** molecular polarity and volatility of VOCs species played key roles in adsorption and the dynamic uptakes were generally listed as follows:ethyl acetate>toluene>*** for the above VOCs mixtures,13X zeolite selectively adsorbed oxygenated VOCs rather than *** contrast,UsY exhibited a preference to trap *** acetate could be readily enriched by ZsM-5 and Beta *** possible explanations and implications are discussed based on the subtle change in electron *** results obtained are vital for understanding the mixture effect of VOCs adsorption and may guide the selection of proper adsorbent for real applications.

关键词： Adsorption Zeolites VOCs Mixture effect DFT

PDOL-Based solid Electrolyte Toward Practical Application:Opportunities and Challenges

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2024年第7期16卷 109-141页

作者： Hua Yang Maoxiang Jing Li Wang hong Xu Xiaohong Yan Xiangming he Institute for Advanced Materials School of Materials Science and EngineeringJiangsu UniversityZhenjiang 212013People’s Republic of China Institute of Nuclear and New Energy Technology Tsinghua UniversityBeijing 100084People’s Republic of China

Polymer solid-state lithium batteries(ssLB)are regarded as a promising energy storage technology to meet growing demand due to their high energy density and *** conductivity,interface stability and battery assembly process are still the main challenges to hurdle the commercialization of *** the main component of ssLB,poly(1,3-dioxolane)(PDOL)-based solid polymer electrolytes polymerized in-situ are becoming a promising candidate solid elec-trolyte,for their high ion conductivity at room temperature,good battery elec-trochemical performances,and simple assembly *** review analyzes opportunities and challenges of PDOL electrolytes toward practical application for polymer *** focuses include exploring the polymerization mechanism of DOL,the performance of PDOL composite electrolytes,and the application of ***,we provide a perspective on future research directions that need to be emphasized for commercialization of PDOL-based electrolytes in *** exploration of these schemes facilitates a comprehensive and profound understanding of PDOL-based polymer electrolyte and provides new research ideas to boost them toward practical application in solid-state batteries.

关键词： Poly(1,3-dioxolane) solid electrolyte Polymerization mechanism Composite electrolyte Practical application

Early endoscopic management of an infected acute necrotic collection misdiagnosed as a pancreatic pseudocyst: A case report

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastrointestinal surgery 2024年第2期16卷 609-615页

作者： hong-Ying Zhang Chen-Cong he Department of Gastroenterology Jinhua People's HospitalJinhua 321000Zhejiang ProvinceChina Department of General Medicine Jinhua Guangfu HospitalJinhua 321001Zhejiang ProvinceChina

BACKGROUND Infected acute necrotic collection(ANC)is a fatal complication of acute pancre-atitis with substantial morbidity and *** plays an exceedingly important role as the first step in invasive intervention for infected necrosis;however,there is great controversy about the optimal drainage time,and better treatment should be *** sUMMARY We report the case of a 43-year-old man who was admitted to the hospital with severe intake reduction due to early satiety 2 wk after treatment for acute pancre-atitis;conservative treatment was ineffective,and a pancreatic pseudocyst was suspected on contrast-enhanced computed tomography(CT).Endoscopic ultra-sonography(EUs)suggested hyperechoic necrotic tissue within the cyst *** wall was not completely mature,and the culture of the puncture fluid was positive for A-haemolytic ***,the final diagnosis of ANC in-fection was *** necrotic collection was not walled off and contained many solid components;therefore,the patient underwent EUs-guided aspiration and *** weeks after the collection was completely encapsulated,pancreatic duct stent drainage via endoscopic retrograde cholangiopancreatography(ERCP)was performed,and the patient was subsequently successfully *** repeat CT,the pancreatic cysts had almost disappeared during the 6-month fo-llow-up period after *** Early EUs-guided aspiration and lavage combined with late ERCP catheter drainage may be effective methods for intervention in infected ANCs.

关键词： Infected acute necrotic collection Pancreatic pseudocyst Endoscopic ultrasonography Endoscopic retrograde cholangiopancreatography Endoscopic ultrasound-guided fine-needle aspiration Case report

Efficient and robust CNN-LsTM prediction of flame temperature aided light field online tomography

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

science China(Technological sciences) 2024年第1期67卷 271-284页

作者： NIU ZhiTian QI hong sUN AnTai REN YaTao he MingJian GAO BaoHai school of Energy science and Engineering Harbin Institute of TechnologyHarbin 150001China Key Laboratory of Aerospace Thermophysics Ministry of Industry and Information TechnologyHarbin 150001China

Light field tomography,an optical combustion diagnostic technology,has recently attracted extensive attention due to its easy implementation and ***,the conventional iterative methods are high data throughput,low efficiency and time-consuming,and the existing machine learning models use the radiation spectrum information of the flame to realize the parameter field measurement at the current *** is still an offline measurement and cannot realize the online prediction of the instantaneous structure of the actual turbulent combustion *** this work,a novel online prediction model of flame temperature instantaneous structure based on deep convolutional neural network and long short-term memory(CNN-LsTM)is *** method uses the characteristics of local perception,shared weight,and pooling of CNN to extract the threedimensional(3D)features of flame temperature and outgoing radiation ***,the LsTM is used to comprehensively utilize the ten historical time series information of high dynamic combustion flame to accurately predict 3D temperature at three future moments.A chaotic time-series dataset based on the flame radiation forward model is built to train and validate the performance of the proposed CNN-LsTM *** is proven that the CNN-LsTM prediction model can successfully learn the evolution pattern of combustion flame and make accurate predictions.

关键词： temperature prediction convolutional neural network long short-term memory light field imaging online tomography