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Radiation synthesis and heavy metal ions removal of cellulose microsphere based adsorbent

IOP Conference Series: Earth and Environmental Science 2019年第1期344卷

作者： J F Du Z Dong L Zhao School of Nuclear Technology and Chemistry & Biology Hubei University of Science and Technology Xianning 437100 China Referred to contribution equally State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan 430074 China

A novel cellulose-based adsorbent was successfully prepared by radiation induced grafting of glycidyl methacrylate onto the surface of cellulose microspheres, followed by epoxy ring-opening reaction to introduce iminodiacetic acid disodium (IDA). The characterization of the obtained adsorbent was investigated in detail. To evaluate the adsorption performance of the novel adsorbent in comparison with commercial adsorbent D850, batch and column mode adsorption experiments against Cu (II) and Ni (II) were conducted. The equilibrium time for Cu (II) and Ni (II) were 20 and 30 min, which is much shorter than that of commercial adsorbent. The adsorption capacity of the adsorbent for Cu (II) and Ni (II) reached 96.90 and 111.11 mg/g, respectively. Applicability of the novel adsorbent on the actual wastewater generated from electroplating plants was also investigated. It was found that the novel adsorbent possessed a higher adsorption/desorption velocity and broadly similar adsorption capacity with the commercial adsorbent, signifying the effective adsorption performance of the developed grafted adsorbent.

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Erratum: Numerical study of stripping and stray particles for the one-RF-driver NBI negative ion source prototype of CFETR (2016 Plasma Phys. Control. Fusion 64 115005)

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Plasma Physics and Controlled Fusion 2023年第5期65卷 059601-059601页

作者： Fei Song Guiqing Zou Dong Li Chen Zuo Peng Chen Dezhi Chen Guangjiu Lei State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan 430000 People’s Republic of China Southwestern Institute of Physics Chengdu 610000 People’s Republic of China

Erratum for Plasma Phys. Control. Fusion 64 115005

Erratum for Plasma Phys. Control. Fusion 64 115005

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Transforming heat transfer with thermal metamaterials and devices

arXiv

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arXiv 2020年

作者： Li, Ying Li, Wei Han, Tiancheng Zheng, Xu Li, Jiaxin Li, Baowen Fan, Shanhui Qiu, Cheng-Wei Department of Electrical and Computer Engineering National University of Singapore Singapore117583 Singapore Interdisciplinary Center for Quantum Information State Key Laboratory of Modern Optical Instrumentation College of Information Science and Electronic Engineering Zhejiang University Hangzhou310027 China ZJU-Hangzhou Global Science and Technology Innovation Center Key Lab. of Advanced Micro/Nano Electronic Devices & Smart Systems of Zhejiang Zhejiang University Hangzhou310027 China Department of Electrical Engineering Ginzton Laboratory Stanford University StanfordCA94305 United States National Engineering Research Center of Electromagnetic Radiation Control Materials State Key Laboratory of Electronic Thin Film and Integrated Devices University of Electronic Science and Technology of China Chengdu610054 China Department of Physics University of Colorado BoulderCO80309 United States School of Mechatronics Engineering Harbin Institute of Technology Harbin150001 China Paul M. Rady Department of Mechanical Engineering University of Colorado BoulderCO80309 United States

| The demand for sophisticated tools and approaches in heat management and control has triggered fast development of emerging fields including conductive thermal metamaterials, nanophononics, far-field and near-field radiative thermal management, etc. In this review, we cast a unified perspective on the control of heat transfer, based on which the related studies can be considered as complementary paradigms toward manipulating physical parameters and realizing unprecedented phenomena in heat transfer using artificial structures, such as thermal conductivity in heat conduction, thermal emissivity in radiation, and properties related to multi-physical effects. The review is divided into three parts that focus on the three main categories of heat flow control, respectively. Thermal conduction and radiation are emphasized in the first and second parts at both macro- and micro-scale. The third part discusses the efforts to actively introduce heat sources or tune the material parameters with multi-physical effects in both conduction and radiation, including works using thermal convection. We conclude the review with challenges in this research topic and new possibilities about topological thermal effects, heat waves, and quantum thermal effects. Copyright © 2020, The Authors. All rights reserved.

关键词： Metamaterials

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Simulation of Sensorless Control for the Start-up of Large-Scale Synchronous Condenser Using Static Frequency Converter

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IOP Conference Series: Earth and Environmental Science 2019年第1期223卷

作者： Li Li Hao Zuo Siyuan Guo Jin Wang Jiawei Zhao State Grid Hunan Electric Power Company Limited Research Institute Changsha 410007 China State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan 430074 China

In this paper, the structural characteristics of large synchronous condensers and the working principle of static frequency converter are studied firstly. Intermittent commutation and natural commutation are adopted by the inverter on the machine side in low-speed and high-speed stage respectively. Second, methods of sensorless control in different conditions are proposed. The initial rotor position is estimated through two methods, the terminal voltage method and the rotor-flux-oriented method. And similar methods are used in low-speed stage. Besides, phase-locked loop is used in high-speed. Finally, simulation models are established in PSCAD/EMDTC. The rotor-flux-oriented method used in standstill condition and low-speed stage shows better accuracy. And the phase-locked loop is also effective in high-speed stage. Therefore, the sensorless control methods are feasible.

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Optimal scheduling modelling for wind power accommodation with compressed air energy storage and price-based demand response

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IOP Conference Series: Earth and Environmental Science 2018年第1期188卷

作者： C L Xu L X Li Y W Li J Y Liu S H Miao Q Y Tu Jiangsu Electric Power Dispatch Center Nanjing 210000 China State Key Laboratory of Advanced Electromagnetic Engineering and Technology Hubei Electric Power Security and High Efficiency Key Laboratory School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan 430074 China

Nowadays, price-based demand response (PDR) programs with compressed air energy storage (CAES) systems have been rapidly developed in China for wind power generation propagation. Based on this development trend, an optimal scheduling model considering thermal power units (TUs), wind power plants, PDR mechanisms and CAES plants is studied in this paper. Considering the factors of uncertainties in PDR, wind power output and electricity demand, a fuzzy power system optimal scheduling model for minimizing the sum of TUs operation cost, CAES plants cost and wind curtailment penalty is proposed. According to the fuzzy scheduling theory, the fuzzy chance constrains are converted into their clear equivalent forms. The simulation study is implemented with using the data from the Huntorf CAES plant, which can verify the feasibility and effectiveness of the optimal scheduling model. It is found that the use of CAES and PDR results in 11.1% reduction in thermal power units operation cost and 71.6% reduction in the penalty of wind curtailment.

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Evolution process of T1 precipitate in Al-Cu-Li-TiC/TiB2 alloy during aging treatment

SSRN

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SSRN 2024年

作者： Wang, Haiyao Li, Jiadong Li, Yong Tang, Hongqun Xu, Guangming Zhang, Tongjin Wang, Yilei Qian, Xiaoming He, Chen State Key Laboratory of Rolling and Automation Northeastern University Shenyang110819 China Guangxi Advanced Aluminum Processing Innovation Center Co.LTD Nanning530007 China Key Laboratory of Electromagnetic Processing of Materials Ministry of Education Northeastern University Shenyang110819 China State Key Laboratory of Featured Metal Materials Life-cycle Safety for Composite Structures Nanning530004 China National Engineering Research Center for Equipment and Technology of Cold Strip Rolling Yanshan University Qinhuangdao066004 China Shenyang Institute of Automation Chinese Academy of Sciences Shenyang110169 China Guangxi University China

In this study, particle-reinforced aluminium matrix composites (PRAMCs) of an Al-Cu-Li alloy were prepared using nano-sized TiB2+TiC particles. The relationship between TiB2+TiC nanoparticles and T1 precipitates during the ageing process, as well as the influence of TiC+TiB2 particles on the growth process of T1 precipitates during the ageing process, were investigated. The grain sizes of the A0 and A1 samples were found to be 249.89 μm and 86.42 μm, respectively. The dislocation density is greater in the deformed A1 sample. The CTE effect generated by TiC and TiB2 particles enhances the deformed matrix's ability to retain dislocations and stimulates the precipitation of T1 precipitates during the ageing treatment. The A1 alloy reached the peak ageing state in a shorter time and yielded a greater number of T1 precipitates. The precipitation process of T1 precipitates can be described as follows: The sequence of events can be described as follows: SSSS→T1P→T1. The transition from T1P (face-centered cubic, FCC) to T1 (hexagonal close packing, HCP) entails a modification in the order of packing. The change in stacking sequence can be attributed to the presence of Shockley dislocations with an a/6 orientation located on the {111} plane of Al-T1P. With regard to thickness, the recently formed T1P precipitate is attached to the established T1 precipitate and extends along the c-axis through the shared copper-rich layer that has formed on both sides of the mature T1 precipitate. Subsequently, it underwent a transformation into a mature T1 precipitate via a process involving T1P. The mechanical properties of sample A1 are optimal at T=22h, with a yield strength, tensile strength, and elongation of 520 MPa, 553 MPa, and 8.2%, respectively. In comparison to the A0 sample, the yield strength and tensile strength exhibited an increase of 5.05% and 5.13%, respectively. © 2024, The Authors. All rights reserved.

关键词： Precipitation (chemical)

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Outside Cover Picture: Plasma Process. Polym. 9/2020

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Plasma Processes and Polymers 2020年第9期17卷

作者： Chen Lu Jinchi Dai Nianguo Dong Yu Zhu Zilan Xiong State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan Hubei China Department of Cardiovascular Surgery Union Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan Hubei China

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Cyclopentylmethyl Ether, a Non-Fluorinated, Weakly Solvating and Wide Temperature Solvent for High-Performance Lithium Metal Battery

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Angewandte Chemie 2023年第21期135卷

作者： Han Zhang Dr. Ziqi Zeng Fenfen Ma Qiang Wu Xinlan Wang Prof. Shijie Cheng Prof. Jia Xie State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan 430074 Hubei China State Key Laboratory of Materials Processing and Die & Mould Technology School of Materials Science and Engineering Huazhong University of Science and Technology Wuhan 430074 Hubei China GuSu Laboratory of Materials Suzhou 215123 Jiangsu China

While recent work demonstrates the advantages of weakly solvating solvents in enhancing the cyclability of LMBs, both new designs and design strategies for high performance weakly solvating solvent, especially physicochemical properties, are still lacking. Here, we propose a molecular design to tune the solvating power and physicochemical properties of non-fluorinated ether solvent. The resulting cyclopentylmethyl ether (CPME) have a weak solvating power and wide liquid-phase temperature range. By optimizing the salt concentration, the CE is further promoted to 99.4 %. Besides, the improved electrochemical performance of Li−S battery in CPME-based electrolytes is obtained at −20 °C. The Li||LFP (17.6 mg cm −2 ) battery with developed electrolyte maintains >90 % of the original capacity over 400 cycles. Our design concept for solvent molecule provides a promising pathway to non-fluorinated electrolytes with weakly solvating power and wide temperature window for high-energy-density LMBs.

关键词： Cyclopentylmethyl Ether Molecular Design Non-Fluorinated Solvent Weakly Solvating Power Wide Temperature Range

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Implementing zero-banana-width quasilinear operator for fast ICRF simulations

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Journal of Physics: Conference Series 2012年第1期401卷

作者： R Bilato M Brambilla Z Jiang Max Planck Institute for Plasma Physics EURATOM Association Boltzmannstr. 2 85748 Garching Germany State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan 430074 China

Numerical simulations of plasma heating with waves in the ion cyclotron range of frequencies (ICRF) require to iteratively couple a solver for wave propagation in plasmas with a solver of the quasilinear kinetic equation. Among the codes developed for this purpose, the TORIC-SSFPQL package is characterized by its high execution speed. The kinetic code SSFPQL, however, was based on a somewhat simplified physical model, in which some important effects of the toroidal geometry were omitted. We have recently improved this model by taking into account in the zero–banana–width limit the influence of toroidal trapping on the ICRF quasilinear operator. To make the extended model compatible with the representation of the ion distribution functions as a truncated series of Legendre polynomials in the velocity pitch-angle adopted in SSFPQL, a special approach based on the multiprecision arithmetic had to be developed. We describe these new developments, and present first results obtained with the improved model.

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4D Printing: A Material Combination Concept to Realize 4D Printed Products with Newly Emerging Property/Functionality (Adv. Sci. 9/2020)

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advanced Science 2020年第9期7卷 2070046-2070046页

作者： Hongzhi Wu Xuan Zhang Zheng Ma Ce Zhang Jingwei Ai Peng Chen Chunze Yan Bin Su Yusheng Shi State Key Laboratory of Materials Processing and Die and Mould Technology School of Materials Science and Engineering Huazhong University of Science and Technology Wuhan 430074 P. R. China State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan 430074 P. R. China

In article number https://***/10.1002/advs.201903208 , Chunze Yan and co‐workers propose a material combination concept, by combining additively manufactured magnetic and electrical building blocks, to construct new 4D printed products. The integrated 4D printed devices show a controllably changed piezoelectric property under the exerted external pressure, as well as new functionality of working as self‐powered pressure‐sensitive monitors.

关键词： 4D printing additive manufacturing flexible magnetoelectronics material combination piezoelectronics

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