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Photocatalytic degradation of methylene blue over MIL-100(Fe)/GO co.posites: a performance and kinetic study

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International Journal of co.l Science & technology 2024年第3期11卷 208-222页

作者： Yuxue Wei Zhiyuan Fu Yingzi Meng Chun Li Fu Yin Xue Wang Chenghua Zhang Lisheng Guo Song Sun School of Chemistry and Chemical Engineering Anhui UniversityHefei230601AnhuiChina Anhui Tanxin technology co. LtdHuaibei235141AnhuiChina

Adsorption co.pled with photocatalytic degradation is proposed to fulfill the removal and thorough elimination of organic ***,we report a facile hydrothermal synthesis of MIL-100(Fe)/GO *** adsorption and photocatalytic degradation process of methylene blue(MB)on MIL‐100(Fe)/GO co.posites were systematically studied from performance and kinetic perspectives.A possible adsorption‐photocatalytic degradation mechanism is *** optimized 1M8G co.posite achieves 95%MB removal(60.8 mg/g)in 210 min and displays well recyclability over ten *** obtained MB adsorption and degradation results are well fitted onto Langmuir isotherm and pseudo‐seco.d order kinetic *** study shed light on the design of MOFs based co.posites for water treatment.

关键词： Graphene oxide Metal organic frameworks Methylene blue Adsorption Photocatalytic degradation

Service Function Chain Deployment Algorithm Based on Multi-Agent Deep Reinforcement Learning

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co.puters, Materials and co.tinua 2024年第3期80卷 4875-4893页

作者： Huang, Wanwei Zhang, Qiancheng Liu, Tao Xu, Yaoli Zhang, Dalei co.lege of Software Engineering Zhengzhou University of Light Industry Zhengzhou 450007 China Henan Jiuyu Tenglong Information engineering co. Ltd. Zhengzhou 450052 China Henan Xin’an co.munication technology co. Ltd. Zhengzhou 450007 China

Aiming at the rapid growth of network services, which leads to the problems of long service request processing time and high deployment co.t in the deployment of network function virtualization service function chain (SFC) under 5G networks, this paper proposes a multi-agent deep deterministic policy gradient optimization algorithm for SFC deployment (MADDPG-SD). Initially, an optimization model is devised to enhance the request acceptance rate, minimizing the latency and deploying the co.t SFC is co.structed for the network resource-co.strained case. Subsequently, we model the dynamic problem as a Markov decision process (MDP), facilitating adaptation to the evolving states of network resources. Finally, by allocating SFCs to different agents and adopting a co.laborative deployment strategy, each agent aims to maximize the request acceptance rate or minimize latency and co.ts. These agents learn strategies from historical data of virtual network functions in SFCs to guide server node selection, and achieve approximately optimal SFC deployment strategies through a co.perative framework of centralized training and distributed execution. Experimental simulation results indicate that the proposed method, while simultaneously meeting performance requirements and resource capacity co.straints, has effectively increased the acceptance rate of requests co.pared to the co.parative algorithms, reducing the end-to-end latency by 4.942% and the deployment co.t by 8.045%. co.yright © 2024 The Authors. Published by Tech Science Press.

关键词： Network function virtualization

Effect of electroacupuncture at Neiguan(PC6)at different time points on myocardial ischemia reperfusion arrhythmia in rats

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Journal of Traditional Chinese Medicine 2024年第1期44卷 113-121页

作者： SUN Qianhui CHENG Kai DAI Xingye YANG Zhiwen WU Xiaoling XU Chang QIU Xinghua GAO Xiaofeng LIU Daonan YANG Qirui School of Acupuncture and Tuina Beijing University of Chinese MedicineBeijing 100029China Beijing MedEx technology co. Ltd.Beijing 100029China

OBJECTIVE:To observe the effects of electroacupuncture at Neiguan(PC6)at different time points on reperfusion arrhythmia(RA)after myocardial ischemia and reperfusion in rats,and to investigate the co.relation of this protective effect with nerve growth factor(NGF),tyrosine kinase A(Trk A),tyrosine hydroxylase(TH),and norepinephrine(NE).METHODS:A total of 72 Sprague-Dawley male rats were randomly divided into six groups(n=12 rats/group):normal group(Norm),sham operation group(Sham),ischemia reperfusion group(I/R),pre-ischemic electroacupuncture group(EAI),pre-reperfusion electroacupuncture group(EAII),post-reperfusion electroacupuncture group(EAIII).The myocardial ischemia-reperfusion injury(MIRI)model was induced by occlusion of left anterior descending co.onary artery for 20 min followed by reperfusion for 40 min in *** no intervention in the Norm group and only threading without ligation in the Sham *** pretreatment at 20 min/d for 7 d before ligation in the EAⅠgroup,20 min of electroacupuncture before reperfusion in the EAII group and 20 min of electroacupuncture after reperfusion in the EAIII *** electrocardiogram(ECG)of each group was reco.ded throughout the whole process,and the success of the MIRI model was determined based on the changs of J-point and T-wave in the *** arrhythmia sco.e was used to reco.d premature ventricular co.tractions,ventricular tachycardia and ventricular fibrillation during the reperfusion period to assess the reperfusion induced *** expression levels of NGF,Trk A,TH protein were measured by Western ***,the expression levels of plasma and myocardial NE levels were detected by enzyme linked immunosorbent ***:The differences between Norm group and Sham group were not statistically significant in all *** sco.e,myocardial NGF,Trk A,TH,and NE expression were significantly higher in the I/R group co.pared with the Sham *** sco.e,myocardial NGF,T

关键词： myocardial reperfusion injury reperfusion arrhythmia electroacupuncture point PC6(Neiguan) nerve growth factor protein-tyrosine kinases norepinephrine

co.tinuous-Time Channel Prediction Based on Tensor Neural Ordinary Differential Equation

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China co.munications 2024年第1期21卷 163-174页

作者： Mingyao Cui Hao Jiang Yuhao Chen Yang Du Linglong Dai The Department of Electronic Engineering Tsinghua UniversityBeijing 100084China Huawei technology co. Ltd.Chengdu Research InstituteChengdu 611730China

Channel prediction is critical to address the channel aging issue in mobile *** channel prediction techniques are mainly designed for discrete channel prediction,which can only predict the future channel in a fixed time slot per frame,while the other intra-frame channels are usually reco.ered by ***,these approaches suffer from a serious interpolation loss,especially for mobile millimeter-wave *** solve this challenging problem,we propose a tensor neural ordinary differential equation(TN-ODE)based co.tinuous-time channel prediction scheme to realize the direct prediction of intra-frame ***,inspired by the recently developed co.tinuous mapping model named neural ODE in the field of machine learning,we first utilize the neural ODE model to predict future co.tinuous-time *** improve the channel prediction accuracy and reduce co.putational co.plexity,we then propose the TN-ODE scheme to learn the structural characteristics of the high-dimensional channel by low-dimensional learnable *** results show that the proposed scheme is able to achieve higher intra-frame channel prediction accuracy than existing schemes.

关键词： channel prediction massive multipleinput-multiple-output millimeter-wave co.munications ordinary differential equation

Antimony doped CsPbI_(2)Br for high-stability all-inorganic perovskite solar cells

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Nano Research 2024年第3期17卷 1508-1515页

作者： Mengfei Zhu Lina Qin Yuren Xia Junchuan Liang Yaoda Wang Daocheng Hong Yuxi Tian Zuoxiu Tie Zhong Jin State Key Laboratory of co.rdination Chemistry Ministry of Education(MOE)Key Laboratory of Mesoscopic ChemistryMOE Key Laboratory of High Performance Polymer Materials and TechnologyJiangsu Key Laboratory of Advanced Organic MaterialsSchool of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China Nanjing Tieming Energy technology co. Ltd.Nanjing 210093China Suzhou Tierui New Energy technology co. Ltd.Suzhou 215228China

All-inorganic perovskites,adopting cesium(Cs+)cation to co.pletely replace the organic co.ponent of A-sites of hybrid organic–inorganic halide perovskites,have attracted much attention owing to the excellent thermal ***,all-inorganic iodine-based perovskites generally exhibit poor phase stability in ambient ***,we propose an efficient strategy to introduce antimony(Sb^(3+))into the crystalline lattices of CsPbI_(2)Br perovskite,which can effectively regulate the growth of perovskite crystals to obtain a more stable perovskite *** to the much smaller ionic radius and lower electronegativity of trivalent Sb^(3+)than those of Pb^(2+),the Sb^(3+)doping can decrease surface defects and suppress charge reco.bination,resulting in longer carrier lifetime and negligible *** a result,the all-inorganic perovskite solar cells(PSCs)based on 0.25%Sb^(3+)doped CsPbI_(2)Br light absorber and screen-printable nanocarbon co.nter electrode achieved a power co.version efficiency of 11.06%,which is 16%higher than that of the co.trol devices without Sb^(3+)***,the Sb^(3+)doped all-inorganic PSCs also exhibited greatly improved endurance against heat and *** to the use of low-co.t and easy-to-process nanocarbon co.nter electrodes,the manufacturing process of the all-inorganic PSCs is very co.venient and highly repeatable,and the manufacturing co.t can be greatly *** work offers a promising approach to co.structing high-stability all-inorganic PSCs by introducing appropriate lattice doping.

关键词： all-inorganic perovskite solar cells Sb doped cesium lead halide perovskites foreign B-site ions hole-co.ductor-free phase stability improvement

Parameter Estimation of a Valve-co.trolled Cylinder System Model Based on Bench Test and Operating Data Fusion

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Chinese Journal of Mechanical Engineering 2024年第2期37卷 247-263页

作者： Deying Su Shaojie Wang Haojing Lin Xiaosong Xia Yubing Xu Liang Hou Pen-Tung Sah Institute of Micro-Nano Science and technology Xiamen UniversityXiamen 361102China Xuzhou XCMG Excavation Machinery co. LtdXuzhou 221000China

The accurate estimation of parameters is the premise for establishing a high-fidelity simulation model of a valve-co.trolled cylinder *** test data are easily obtained,but it is challenging to emulate actual loads in the research on parameter estimation of valve-co.trolled cylinder *** the actual load information co.tained in the operating data of the co.trol valve,its acquisition remains *** paper proposes a method that fuses bench test and operating data for parameter estimation to address the aforementioned *** proposed method is based on Bayesian theory,and its co.e is a pool fusion of prior information from bench test and operating ***,a system model is established,and the parameters in the model are ***,the bench and operating data of the system are ***,the model parameters and weight co.fficients are estimated using the data fusion ***,the estimated effects of the data fusion method,Bayesian method,and particle swarm optimisation(PSO)algorithm on system model parameters are *** research shows that the weight co.fficient represents the co.tribution of different prior information to the parameter estimation *** effect of parameter estimation based on the data fusion method is better than that of the Bayesian method and the PSO *** load co.plexity leads to a decrease in model accuracy,highlighting the crucial role of the data fusion method in parameter estimation studies.

关键词： Valve-co.trolled cylinder system Parameter estimation The Bayesian theory Data fusion method Weight co.fficients

Migration Behavior of Impurity Iron in Silico. Melt Under Pulsed Electric Current

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Acta Metallurgica Sinica(English Letters) 2024年第5期37卷 889-903页

作者： Mengcheng Zhou Yaxiong Dai Changhao Liu Shengli Ding Xinfang Zhang School of Metallurgical and Eco.ogical Engineering University of Science and Technology BeijingBeijing 100083China Guangdong Zhongnan Iron&Steel co. Ltd.Guangdong 512123China

The impurity iron in silico. material will seriously affect the photoelectric co.version efficiency of silico. solar ***,the traditional silico. purification method has the disadvantages of long cycle,high energy co.sumption and serious *** this study,an efficient and green pulsed electric current purification technology is *** electromigration effect of iron elements,the current density gradient driving of iron phase,and the gravity of iron phase all affect the migration behavior of iron phase in silico. melt under pulsed electric *** of the depth of electrode insertion into the silico. melt,the solubility of iron in silico. decreases under the pulsed electric current,which helps to form the iron *** the same time,the iron phase tends to sink toward the bottom under the influence of *** the electrode is shallowly inserted,a non-uniform electric field is formed in the silico. melt,and the iron phase is mainly driven by the current density gradient to accelerate sink toward the *** the electrode is fully inserted,an approximately uniform electric field is formed in the silico. melt,and iron elements are preferentially migrated to the cathode by electromigration,forming iron phase sinking at the *** study of impurity iron migration behavior in silico. melt under pulsed electric current provides a new approach for the purification of polycrystalline silico..

关键词： Metallurgical silico. Pulsed electric current Iron-rich phase Current density gradient Electromigration

Study of poly-disperse aerosols deposition in turbulent flow with different Reynolds numbers

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Particuology 2024年第6期89卷 32-43页

作者： Zhichao Gao Yongzheng Chen Dandi Zhang Peng Chen Lili Tong Xuewu Cao School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai200240China China Nuclear Power technology Research Institute co. Ltd.Shenzhen518000China

The turbulent deposition mechanism is one of the main mechanisms of aerosol deposition in nuclear power plant *** experimental study of poly-disperse aerosol deposition in a horizontal tube is co.ducted,where the nominal Reynolds number(Re)is in a range of 3600–200,*** aerosol deposition velocity first increases and then decreases with the increase of Res,and at high Re,particle rebound occurs during aerosol deposition in the *** the Re is low,the aerosol deposition velocity increases with the increase of aerosol *** the Re is greater than 60,000,the deposition velocity first increases and then decreases with the increase of aerosol diameter due to particle surface rebound.A new aerosol deposition model has been developed by establishing the energy co.servation equation of the rebounded particles in the visco.s *** calculated results of the new model are in good agreement with these experimental results,and the error between the aerosol deposition velocity calculated by the model and experimental results is between−60%and 150%.

关键词： Aerosol Turbulent deposition Rebound High Reynolds number

Development and Catalytic Cracking Performance of Ultrastable Y Zeolite Rich in Seco.dary Pores

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China Petroleum Processing & Petrochemical technology 2024年第2期26卷 13-21页

作者： Li Jiaxing Wang Shengji Sha Hao Wang Juan Zhou Lingping Wang Lixia SINOPEC Research Institute of Petroleum Processing co. LtdBeijing 100083China Catalyst co. Ltd.Qilu BranchSINOPECZibo 255336China

A novel ultra-stable zeolite, NSZ, rich in seco.dary pores was developed through the co.bination of gas-phase andmild hydrothermal methods. This zeolite was successfully tested in an industrial setting for the first time in the world. The porestructure characteristics of the NSZ zeolite prepared for industrial use were analyzed and characterized using BET. The resultsindicate a significant increase in the seco.dary pore volume of NSZ zeolite co.pared to the existing ultra-stable zeolite HSZ-5, which is produced through a co.ventional gas-phase method. The average seco.dary pore volume to total pore volume ratioin NSZ zeolite was found to be 58.96% higher. The catalytic cracking performance of NSZ zeolite was evaluated. The resultsshowed that the NSC-LTA catalyst, with NSZ as the active co.ponent, outperformed the HSC-LTA catalyst with HSZ-5 zeolitein terms of obtaining more high-value products (gasoline and liquefied petroleum gas) during the hydrogenated light cycle oilprocessing. Additionally, the NSC-LTA catalyst showed a significant improvement in co.e selectivity.

关键词： gas-phase ultra-stable zeolite catalyst catalytic cracking