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A convenient method for the determination of molecular weight cut-off of ultrafiltration membranes

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Chinese Journal of Chemical Engineering 2017年第1期25卷 62-67页

作者： Cunyu li Yun Ma hongyang li Guoping Peng Pharmacy College Nanjing University of Chinese Medicine Nanjing 210023 China Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization Nanjing 210023 China

With the rapid increase of water contamination,membrane separation technology and their corresponding molecular weight cut-off(MWCO) evaluation method become more *** this study,Panax notoginseng saponins was used as a new standard marker to determinate ultrafiltration(UF) membrane MWCOs,series of Millipore membranes were selected as control group to analyze and calculate the relationship between retention rate and MWCOs with exponential or logarithmic equation.A new and convenient method was provided for determining the membrane MWCO by modeling analysis retention rate with MWCOs,and the regression coefficients >*** feasibility and practicability of established method was verified by different manufactures' membrane and *** the detection progress,as the main ingredient of Panax notoginseng saponins,Notoginsenoside R_1,Ginsenoside Rg_1,Ginsenoside Rb_1 and Ginsenoside Rd with different surface activity,the MWCO range of UF membranes can be divided into two zones mainly due to the retention rate difference among Notoginsenoside R_1,Ginsenoside Rg_1,Ginsenoside Rb_1 and Ginsenoside *** 1,1000-10000;and Zone II,***,the new method would be helpful to improve the applicability of UF membrane in separation technology.

关键词： Ultrafiltration membrane Molecular weight cut-off

Parallel Control for Continuous-Time linear Systems:A Case Study

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IEEE/CAA Journal of Automatica Sinica 2020年第4期7卷 919-928页

作者： Qinglai Wei hongyang li Fei-Yue Wang the State Key Laboratory of Management and Control for Complex Systems Institute of AutomationChinese Academy of SciencesBeijing 100190 the University of Chinese Academy of Sciences Beijing 100049 Qingdao Academy of Intelligent Industries Qingdao 266109China the Institute of Systems Engineering Macao University of Science and Technology

In this paper,a new parallel controller is developed for continuous-time linear *** main contribution of the method is to establish a new parallel control law,where both state and control are considered as the *** structure of the parallel control is provided,and the relationship between the parallel control and traditional feedback controls is *** the situations that the systems are controllable and incompletely controllable,the properties of the parallel control law are *** parallel controller design algorithms are given under the conditions that the systems are controllable and incompletely ***,numerical simulations are carried out to demonstrate the effectiveness and applicability of the present *** Terms-Continuous-time linear systems,digital twin,parallel controller,parallel intelligence,parallel systems.

关键词： Index Terms—Continuous-time linear systems digital twin parallel controller parallel intelligence parallel systems

Function, energy and environment orientation in innovation research of rare earth materials

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Science China(Technological Sciences) 2019年第12期62卷 2302-2305页

作者： ZHOU XueZhen li hongyang liU YanZhu li YongXiu Research Center for Rare Earths & Micro/nano Functional Materials Nanchang University

Rare earths(REs),as a kind of key elements widely used in high-tech industry,have been paid more and more attention all over the *** a time when the world trade war is raging,dignitaries and executives are trying to control this strategic resource,while scientific and technological re-searchers are trying to solve the scientific and technological problems in the development of RE *** innovation research of RE materials are orientated by three main aspects as shown in Figure 1:one is to make the production process of RE materials more green and sustainable,the second is to strengthen the material properties and save energy,and the third is to find new functional materials with improved quality..

关键词： Figure energy technological

Phosphorylated cellulose nanofibers establishing reliable ion-sieving barriers for durable lithium-sulfur batteries

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Journal of Energy Chemistry 2024年第5期92卷 619-628页

作者： Zihao li Pengsen Qian hongyang li He Xiao Jun Chen Gaoran li School of Materials Science and Engineering Nanjing University of Science and TechnologyNanjing 210094JiangsuChina National Forestry and Grassland Administration Key Laboratory of Plant Fiber Functional Materials Fuzhou 350108FujianChina

The shuttle effect is among the most characteristic and formidable challenges in the pursuit of high-performance lithium-sulfur(li-S)***,phosphorylated cellulose nanofibers(pCNF)are intentionally engineered to establish an ion-sieving barrier against polysulfide shuttling and thereby improve battery *** phosphorylation,involving the grafting of phosphate groups onto the cellulose backbone,imparts an exceptional electronegativity that repels the polysulfide anions from penetrating through the ***,the electrolyte wettability and li^(+)transfer can be significantly promoted by the polar nature of pCNF and the facile li^(+)*** such,rational ion management is realized,contributing to enhanced reversibility in both sulfur and lithium *** a result,li-S cells equipped with the self-standing pCNF separator demonstrate outstanding long-term cyclability with a minimum fading rate of 0.013%per cycle over 1000 cycles at 1 C,and a decent areal capacity of 5.37 mA h cm^(-2) even under elevated sulfur loading of 5.0 mg cm^(-2) and limited electrolyte of 6.0 mL g^(-1).This work provides a facile and effective pathway toward the well-tamed shuttle effect and highly durable li-S batteries.

关键词： lithium-sulfur batteries Cellulose Phosphorylation Ion-sieving Shuttle effect

Intra-Oceanic Subduction of the Paleo-Asian Oceanic Slab: New Evidence from the Early Carboniferous Quartz Diorite in the Diyanmiao Ophiolite

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Acta Geologica Sinica(English Edition) 2020年第2期94卷 565-567页

作者： WANG Jinfang li Yingjie li hongyang DONG Peipei School of Natural Resources Hebei Geo UniversityShijiazhuang 050031China

Late Paleozoic supra-subduction zone(SSZ)-type ophiolites and intra-oceanic arc igneous petrotectonic assemblages are developed in the Erenhot-Hegenshan suture zone(EHSZ)in the eastern part of the Central Asian Orogenic Belt(CAOB).which contains information about the Late Paleozoic tectonic evolution of the Paleo-Asian Ocean(PAO)in the eastern ***,there are two main views and associated controversies about the closure time of the PAO in the eastern CAOB,which are“collision suture from Late Devonian to Early Carboniferous”and“final suture from Late Permian to Early Triassic”.

关键词： Carboniferous Asian suture

Zircon LA-ICP-MS U-Pb Age and Island-Arc Origin of the Bayanhua Gabbro in the Hegenshan Suture Zone, Inner Mongolia

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Acta Geologica Sinica(English Edition) 2017年第6期91卷 2316-2317页

作者： WANG Jinfang li Yingjie li hongyang School of Natural Resources Hebei Geo University

Objective The Bayanhua Nb-enriched gabbro is newly discovered in the Diyanmiao-Meilaotewula SSZ-type ophiolitic m61ange belt of the Hegenshan suture zone, Inner Mongolia. Nb-enriched arc gabbros are usually believed to result from partial melting of the mantle wedge peridotites metasomatized by slab melts derived from the subducting oceanic slab, which represent arc magmatic markers of the oceanic subduction zone. However, whether the Hegenshan ocean basin of the Paleo-Asian Ocean was in its subduction stage in the Early Permian requires further study for a final conclusion, and what is the evolution process of the oceanic subduction and lithospheric mantle of the Hegenshan suture zone remains speculative for the lack of further definitely petrological and chronological evidence and constraints. Therefore, this study carried out zircon LA-ICP-MS U-Pb geochronology and geochemistry on the Bayanhua Nb-enriched gabbro to discuss its origin, in order to provide new evidence for the tectonic evolution of the Hegenshan suture zone of the eastern Central Asian Orogenic Belt.

关键词： Zircon LA-ICP-MS U-Pb Age and Island-Arc Origin of the Bayanhua Gabbro Inner Mongolia

Carbonyl polymeric electrode materials for metal-ion batteries

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Chinese Chemical Letters 2018年第2期29卷 232-244页

作者： Mi Tang hongyang li Erjing Wang Chengliang Wang School of Optical and Electronic Information Huazhong University of Science and Technology School of Materials Science and Engineering Hubei University

Benefiting from the diversity and subjective design feasibility of molecular structure, flexibility,lightweight, molecular level controllability, resource renewability and relatively low cost, polymeric electrode materials are promising candidates for the next generation of sustainable energy resources and have attracted extensive attention for the foreseeable large scale applications. The conductive polymers have been utilized as electrode materials in the pioneer reports, which, however, have the disadvantages of low stability, low reversibility and slope voltage due to the delocalization of charges in the whole conjugated systems. The discovery of carbonyl materials aroused the interest of organic and polymeric materials for batteries again. This review presents the recent progress in carbonyl polymeric electrode materials for lithium-ion batteries, sodium-ion batteries and magnesium-ion batteries. This comprehensive review is expected to be helpful forarousing more interest of organic materials for met

关键词： Carbonyl polymers Organic lithium-ion batteries Organic sodium-ion batteries Energy storage Electrode materials

Bidirectionally polarizing surface chemistry of heteroatom-doped carbon matrix towards fast and longevous lithium-sulfur batteries

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Chinese Chemical Letters 2023年第7期34卷 313-317页

作者： hongyang li Bo Cai Yingze Song Wenlong Cai Gaoran li MIIT Key Laboratory of Advanced Display Materials and Devices College of Materials Science and EngineeringNanjing University of Science and TechnologyNanjing210094China State Key Laboratory of Organic Electronics and Information Displays&Institute of Advanced Materials(IAM) Nanjing University of Posts&TelecommunicationsNanjing210023China State Key Laboratory of Environmental-Friendly Energy Materials School of Materials Science and EngineeringSouthwest University of Science and TechnologyMianyang621010China Department of Advanced Energy Materials College of Materials Science and EngineeringSichuan UniversityChengdu 610064China

Herein, a bidirectional polarization strategy is proposed for hosting efficient and durable lithium-sulfur battery(li-S) electrochemistry. By co-doping electronegative N and electropositive B in graphene matrix(BNrGO), the bidirectional electron redistribution enables a higher polysulfide affinity over its monodoped counterparts, contributing to strong sulfur immobilization and fast conversion kinetics. As a result,BNrGO as the cathode host matrix realizes excellent cycling stability over 1000 cycles with a minimum capacity fading of 0.027% per cycle, and superb rate capability up to 10 C. Meanwhile, decent areal capacity(6.46 m Ah/cm^(2)) and cyclability(300 cycles) are also achievable under high sulfur loading and limited electrolyte. This work provides instructive insights into the interaction between doping engineering and sulfur electrochemistry for pursuing superior li-S batteries.

关键词： lithium-sulfur battery Facile synthesis Heteroatom doping Bidirectional polarization Shuttle effect

Analysis of the Internal Pressure in Tube Hydroforming and Its Experimental Investigation

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Journal of Materials Science & Technology 2006年第2期22卷 284-288页

作者： hongyang li Zhongren, WANG Qibin MIAO Shijian YUAN Xiaosong WANG Department of Plasticity-Technology Shanghai Jiao Tong University Shanghai 200030 China School of Materials Science and Engineering Harbin Institute of Technology Harbin 150001 China

The internal pressure of the process was studied theoretically and experimentally. The external load character and internal stress character of tube hydroforming were discussed first. Then, according to the characters, the function and classification of internal pressure were presented in general. Base on the stress analysis, its effect on the yield criterion and calculation formula were also researched and derived. To verify the correction of the theoretical analysis and derived formula, experiments with different internal pressures were carried out and the result was compared and discussed. It demonstrates that internal pressure plays an important role in tube hydroforming and theory and formula discussed and derived by this paper are feasible in practice.

关键词： Tube hydroforming Internal pressure Stress state Yield criterion