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Tuning the porosity of {Co12IICo8III（μ3-OH）24（X）}11+ supramolecular frameworks by reaction time for D2/H2 separation

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Science China Chemistry 2025年

作者： Zhuozhou Xie Zhu Zhuo Zi-Ang Nan Qing Li Xiufang Li Zi-Xiu lu Linzhe Lü Jin Liu luyao Liu Wenjing Wang wei Wang Daqiang Yuan You-Gui huang State Key Laboratory of Structure Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences University of Chinese Academy of Sciences Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials Xiamen Institute of Rare Earth Materials Haixi InstitutesChinese Academy of Sciences State Key Laboratory of Physical Chemistry of Solid Surfaces Department of Chemistry College of Chemistry and Chemical EngineeringXiamen University

Systematicly tuning the porosities of porous materials is crucial for targeted gas mixture separation,yet it remains a longstanding *** a common strategy,altering the phenylene ring count in the organic building units has been exploited to adjust pore apertures in metal organic frameworks （MOFs） and covalent organic frameworks （COFs）,resulting in only a stepwise pore size variation of approximately 2.8?.Unlike MOFs and COFs,the porosities for supramolecular assembly frameworks are highly dependent on the packings of the molecular building units in the *** above strategy cannot be applied to supramolecular assembly frameworks and other strategies are required to adjust pore apertures in supramolecular frameworks,especially to achieve porous materials with the optimal pore size for D2/H2separation （～3?）.Here,we successfully modulate the porosity of supramolecular frameworks of[CoII1+12CoIII8L12（μ3-OH）24（X）]1clusters （L=mono-deprotonated 1-iminoisoindole-3-amine,X=ClO?4or Cl?） by controlling the duration of self-assembly *** simply adjusting the reaction time,we obtain three[CoII12CoIII8L12（μ3-OH）24（X）]11+supramolecular frameworks:[CoII12CoIII8（μ3-OH）24（ClO4）L12)]·（Cl）4·（HCO2）7（1）,[CoII12CoIII8L12（μ3-OH）24（Cl）]·（ClOI4）4·（Cl）6·（HCO2）·（H2O）10（2）,and[CoI12CoIII8L12（μ3-OH）24（Cl）]·（Cl）11·（H2O）12（3）.The different stacking patterns of the[CoII12CoIII8L12（μ3-OH）24（X）]11+clusters in these frameworks lead to significantly varied stabilities and *** 1 exhibits permanent porosity with interconnected channels and maintains stability under harsh *** contrast,compound 2 is nearly nonporous,and compound 3 becomes unstable upon *** pores of compound 1 show higher affinity to D2than H2,and the pore aperture diameter of compound 1 （～3.06?） meets the optimal porosity for D2/***,compound 1 demonstrates moderate D2/H2separation at 77 K (retention time:～7 min/g for D2/H2/Ne （10/10/80 vol%） in a flow of 5 mL

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Nonlinear Coupling of Langmuir Wave and Dust-Acoustic Wave in Plasmas with the Variable-charge grains

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Chinese Physics Letters 1999年第8期16卷 577-579页

作者： CHEN Yin-hua lu wei Department of Modern Physics University of Science and Technology of ChinaHefei 230027

Nonlinear interaction of the Langmuir wave and the dust-acoustic wave in plasmas with the variable-charge grains has been *** the approximation of small amplitude,we find the solution of envelope soliton for the nonlinear Langmuir *** results show that the amplitude of envelope soliton increases with the increasing of dust grain density.

关键词： density. wave. Nonlinear

Solitary Kinetic Alfven Waves in a Low-β Dusty Plasma

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Chinese Physics Letters 2000年第2期17卷 117-119页

作者： CHEN Yin-hua lu wei Department of Modern Physics University of Science and Technology of ChinaHefei 230027

The nonlinear kinetic Alfven waves in a low-β(0<β<1)dusty plasma have been investigated with the fluid model of three-component plasma. The nonlinear equation governing the perturbation density of electrons in a for... 详细信息

The nonlinear kinetic Alfven waves in a low-β(0luid model of three-component plasma. The nonlinear equation governing the perturbation density of electrons in a form of the energy integral has been derived. In the approximation of small amplitude, the soliton solution for the perturbation density of electrons is found, and the characteristics of solitons in different range of plasma parameters is studied numerically. The results show that the density dip or hump can be formed in a dusty plasma for different ranges of parameters, the amplitude of density dip is enhanced and the amplitude of density hump is reduced with increasing dust grain content.

关键词： perturbation nonlinear soliton

Transverse Bending Characteristics in U-channel Forming of Tailor Rolled Blank

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Journal of Iron and Steel Research International 2016年第12期23卷 1249-1254页

作者： hua-wei ZHANG Ying-ping GUAN Jia-lu WU Xiang-hua LIU School of Control Engineering Northeastern University at Qinhuangdao College of Mechanical Engineering Yanshan University Research Institute of Science and Technology Northeastern University

Research on the formability of tailor rolled blank （TRB） is of good practical significance and application value because of the enormous potential of TRB in the aspect of automobile lightweight. However, the forming of TRB is problematic because of the varying properties; especially, springback is a main challenge. The transverse bending （bending axis is perpendicular to the rolling direction） of TRB U channel was studied through simulation and experiment. The forming characteristics of TRB U channel during transverse bending were analyzed. The mechanisms of forming defects, including bending springback and thickness transition zone （TTZ） movement, were revealed. On this basis, effects of blank geometric parameters on springbaek and TTZ movement were discussed. The results indicate that springback and TTZ movement happen during transverse bending of TRB U-channel. Nonuni form stress distribution is the most fundamental reason for the occurrence of springback of TRB during transverse bending. Annealing can eliminate nonuniform stress distribution, and thus diminish springbaek of TRB, especially springback on the thinner side. Therefore, springback of the whole TRB becomes more uniform. However, annealing can increase the TTZ movement. Blank thickness and TTZ position are the main factors affecting the formability of TRB U-channel during transverse bending.

关键词： tailor rolled blank transverse bending springback U-channel annealing thickness transition zone

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Crack defect of tailor rolled blank in deep drawing process

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Journal of Iron and Steel Research International 2018年第12期25卷 1237-1243页

作者： hua-wei Zhang Jia-lu Wu Xin-gang Wang School of Mechanical Engineering and Automation Northeastern UniversityShenyang 110819LiaoningChina

The deformation process of tailor rolled blank (TRB)is different from that of a monolithic blank as a result of the variable thickness in the rolling direction,and thus,the mechanism of the crack phenomenon needs to be further *** crack defect of TRB square box was studied by numerical simulation and stamping *** stress state of TRB square box was *** this basis,the forming characteristics of TRB square box were *** effects of blank size and blank holder force (BHF)on the thickness thinning of TRB were ***,the *** the crack defect for TRB square box was *** indicate that non-uniformity is the most prominent characteristic during forming of TRB square *** larger the blank size and BHF on the thinner side are,the more inclined TRB is to crack. Excessive BHF or insufficient BHF on the thicker side can also lead to the occurrence of the crack *** on the thinner side slightly greater than that on the thicker side (40 kN on the thinner side and 20 kN on the thicker side)is advantageous to restrict the excessive thickness thinning of TRB and acquire a better *** location inclined to crack for TRB square box is the round comer of the wall on the thinner side.

关键词： Tailor rolled blank Square box Crack Blank size Blank holder force

Controllable synthesis of biomimetic wood stem nanoporous high entropy oxides catalysts for oxygen evolution reaction

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Nano Research 2025年第1期18卷 107-117页

作者： wei Wang weiqi Wang Huihui Wang Xing lu Jinwen Zhang Yunzhuo lu School of Materials Science and Engineering Dalian Jiaotong UniversityDalian 116028China School of Intelligence and Electronic Engineering Dalian Neusoft University of InformationDalian 116023China Guangdong Key Laboratory of Materials and Equipment in Harsh Marine Environment Guangzhou Maritime UniversityGuangzhou 510725China

Bubbles generated during the oxygen evolution reaction(OER)in water splitting readily adhere to the electrode surface,thereby impeding contact between the electrolyte and the active sites,thereby increasing the ***,it is imperative to elucidate the bubble release behavior and engineer electrodes that facilitate faster bubble *** this study,inspired by the wood stem of the Norway spruce,we synthesized a gradient nanoporous high-entropy oxide(GNP-HEO)electrode with a controllable pore *** GNP-HEO,featuring a well-controlled gradient in pore size,is achieved through a straightforward strategy combining selective laser melting with selective phase *** unique gradient nanoporous structure not only facilitates bubble release but also diminishes the bubble shielding effect in OER,thereby enhancing electrocatalytic *** affect interaction of Al,Co,Cr,Fe,and Ni,coupled with the gradient nanoporous structure,yields exceptional OER performance,evidenced by an overpotential of 250 mV at a current density of 50 mA/cm^(2) and a Tafel slope of 38.0 mV/dec in 1 M *** functional theory calculations confirm that the GNPHEO adheres to the adsorbate evolution mechanism reaction pathway and exhibits significant *** work highlights a promising approach for the design and synthesis of high-performance OER electrocatalysts.

关键词： oxygen evolution reaction high-entropy oxides selective phase dis-solution selective laser melting gradient nanoporous

Advances in Delivering Oxidative Modulators for Disease Therapy

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Research 2023年第2期2022卷 115-138页

作者： wei Yang hua Yue Guihong lu Wenjing Wang Yuan Deng Guanghui Ma wei wei StateKey Laboratoryof BiochemicalEnginring Institute of Proess EngineeringChinese Academyof SciencesBejingChina School of Chemical Engineering University of Chinese Academy of SciencesBeijingChina Department of Orthopedics Fourth Medical CenterGeneral Hospital of Chinese PLABeijingChina

Oxidation modulators regarding antioxidants and reactive oxygen species(ROS)inducers have been used for the treatment of many ***,a systematic review that refers to delivery system for divergent modulation of oxidativ... 详细信息

关键词： oxidative system Oxidation

Towards asynchronous federated learning for heterogeneous edge-powered internet of things

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Digital Communications and Networks 2021年第3期7卷 317-326页

作者： Zheyi Chen weixian Liao Kun hua Chao lu wei Yu Department of Computer and Information Sciences Towson UniversityTowsonMD21252USA Department of Electrical and Computer Engineering Lawrence Technological UniversitySouthfieldMI48075USA

The advancement of the Internet of Things(IoT)brings new opportunities for collecting real-time data and deploying machine learning ***,an individual IoT device may not have adequate computing resources to train and deploy an entire learning *** the same time,transmitting continuous real-time data to a central server with high computing resource incurs enormous communication costs and raises issues in data security and *** learning,a distributed machine learning framework,is a promising solution to train machine learning models with resource-limited devices and edge ***,the majority of existing works assume an impractically synchronous parameter update manner with homogeneous IoT nodes under stable communication *** this paper,we develop an asynchronous federated learning scheme to improve training efficiency for heterogeneous IoT devices under unstable communication ***,we formulate an asynchronous federated learning model and develop a lightweight node selection algorithm to carry out learning tasks *** proposed algorithm iteratively selects heterogeneous IoT nodes to participate in the global learning aggregation while considering their local computing resource and communication *** experimental results demonstrate that our proposed asynchronous federated learning scheme outperforms the state-of-the-art schemes in various settings on independent and identically distributed(i.i.d.)and *** distribution.

关键词： Asynchronous federated learning Internet of Things(IoT) Mobile edge computing

Reclamation of CO_(2) sodium silicate used sands by steam leaching

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China Foundry 2023年第6期20卷 537-544页

作者： Ji-jun lu wei He Lei Yang hua-fang Wang School of Mechanical Engineering and Automation Wuhan Textile UniversityWuhan 430200China

The bond film on the surface of the CO_(2) sodium silicate used sands is not easy to decompose,therefore,it is difficult to reclaim used sands.A new reclamation method of CO_(2) sodium silicate used sands was developed by steam leaching,which can reduce the water consumption of reclamation and improve the removal effect of sodium silicate bond ***,the leaching effect of the sodium silicate sands after 20/200/400/600/800/1,000℃ heat preservation treatment was ***,the influence of the leaching time on the removal effect of the sodium silicate bond film was ***,the casting properties of the reclaimed sands after the leaching reclamation treatment were *** results show for simulated used sands after 30 min of steam leaching,the removal ratio of the alkali exceeds 84.1%,the removal ratio of silicate is 86.2%,and the removal ratio of carbonate is 93.6%.The removal rate of alkali,silicate and carbonate is relatively low in the leaching time of 30-50 *** the reclamation effect and cost,the leaching time is controlled in 30 *** consumption is only 60%of the mass of used sands for 30 min steam leaching,while it is 200%for wet *** analysis shows that most of the hazardous substances in the used sands are removed in 30 min steam leaching,and the reclaimed sands surface after steam leaching in 50 min is as smooth as new *** 30 min of steam leaching,the alkali removal effect of the factory used sands can reach 81.5%,the water consumption by the steam leaching reclamation is 58%of the mass of the used sand,which is similar to the result of simulated used *** performance of reclaimed sands obtained after 30 min steam leaching is better than that of new sands when the amount of sodium silicate added is 6%of the mass of the reclaimed sands and the CO_(2) blowing time is 15 s:the 24 h ultimate compressive strength of reclaimed sands is 5.6 MPa(equated with new sands),and the collapsibil

关键词： sodium silicate sands steam leaching simulated temperature reclamation

维普期刊数据库