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Surface modification of wollastonite by the mechano-activated method and its properties

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International Journal of Minerals,Metallurgy and Materials 2011年第1期18卷 83-88页

作者： Hao Ding Shou-ci Lu gao-xiang du School of Materials Science and Technology China University of Geosciences Beijing 100083 China School of Civil and Environmental Engineering University of Science and Technology Beijing Beijing 100083 China

Surface modification of wollastonite particles using titanate as a modification agent incorporated by simultaneous wet ultra-fine grinding in a laboratory stirred mill was *** physical,physic-chemical and application properties of the modified wollastonite were measured and *** results showed that grinding intensity markedly influences the modification effect because of the mechano chemical *** hydrophilic surface of wollastonite was turned into a hydrophobic one after *** interaction between titanate and wollastonite under wet grinding circumstances was *** was suggested that physical adsorption and chemical adsorption of titanate coexisted on the wollastonite *** mechanical properties of polyethylene（PE） filled with the modified wollastonite powder were markedly improved.

关键词： silicate minerals modification surface properties ball milling fillers

Tough and Multi-responsive Hydrogels Based on Core-Shell Structured Macro-crosslinkers

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Chinese Journal of Polymer Science 2017年第10期35卷 1286-1296页

作者： gao-lai du Yang Cong Long Chen Jing Chen 付俊 Polymers and Composites Division & Cixi Institute of Biomedical Engineering Ningbo Institution of Materials Technology and Engineering Chinese Academy of Sciences Ningbo 315201 China School of Chemical Engineering Ningbo University of Technology Ningbo 315201 China

Novel hydrogels based on core-shell structured macro-crosslinkers were synthesized, which exhibited high toughness and multiple responsiveness. Sodium dodecyl sulfate（SDS） micelles mediated by Na Cl were used to encapsulate hydrophobic stearyl methacrylate（C18） in the core, and hydrophilic 2-acrylamido-2-methyl-1-propanesulfonic（AMPS） monomers in the corona. Such core-shell micelles were simultaneously copolymerized with acrylamide monomers through free radical polymerization. As a result, hydrogels crosslinked by amphiphilic “poly（C18）-PAMPS” macro-crosslinkers were obtained. These hydrogels showed excellent tensile and compression strength and toughness. Cyclic compression loadingunloading tests demonstrated that the hydrogels were of outstanding fatigue resistance, and showed partial damage of energy dissipation mechanism. The damaged energy dissipation mechanism could be recovered at room temperature and the recovery could be accelerated at elevated temperatures. The hydrogels were sensitive to the change in p H and ion strength, showing reversible swelling/deswelling behaviors.

关键词： hydrogel modulated immersed permanent spontaneously Dopamine tensile catechol attributed modulus

Issues in conserving'orphan heritage'in Asia:WWIl battlefield conservation in Hong Kong and Malaysia

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Built Heritage 2021年第2期5卷 66-85页

作者： Yi-Wen Wang Jesse DiMeolo gao du Department of Urban Planning&Design Xi'an Jiaotong-Liverpool University111 Ren'ai RoadDushu Lake Higher Education TownSuzhou Industrial ParkSuzhou 215123Jiangsu ProvinceChina Planning and Development Services Department The City of College Station4300 Milam StreetBryanTX 77801USA Department of Sociology Social Policy and CriminologyUniversity of Liverpoolbased at Department of Urban Planning&DesignXi'an Jiaotong-Liverpool UniversitySuzhouChina.

Wars and conflict have existed since the beginning of *** battlefield conservation work is done for battlefields that lie in the borders of the nations that were involved,thus fostering citizens'personal ties with the site and their national ***,some areas of the world suffer from conservation neglect because of the distance and separation between the battlefield's location and the country to which it is relevant,thus creating a dislocated appreciation of heritage described by Price(Confl Archaeol 1:181-196,2005)as'orphan heritage'.This paper questions the extent to which post-colonial nations are willing to protect and conserve World WarⅡbattlefields on their *** examines two battlefields in Asia-the Gin Drinkers'Line in Hong Kong,China,and the Green Ridge battlefield in Kampar,Malaysia--that have been the subject of campaigns to recognise their transnational heritage *** battles involved multinational Allied forces led by the British against Japanese troops.A combination of political and economic factors has influenced how the two battlefields are understood and appreciated by citizens and local governments in the host *** paper delineates how these two Asian battlegrounds,which are relatively unknown to the general public,have been brought to the public's attention and by whom as well as how the local governments have handled the demand to safeguard the *** argue that the global nature of WWⅡmakes its commemoration geographically challenging and politically *** WWⅡbattlefields in Asia attest to the historical authenticity of past conflicts and thus should be conserved as neutrally as *** successful protection of battlefields in Malaysia and Hong Kong thus far can be largely attributed to grassroots initiatives,pressure from stakeholder countries,such as the UK,and academic research whereby the significance of the battleground is made known to people in Hong Kong and *** public supp

关键词： World warⅡ battlefields conservation transnational heritage post-colonial countries

Dynamic and Static Recrystallization Behavior of Low Carbon High Niobium Microalloyed Steel

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Journal of Iron and Steel Research International 2011年第1期18卷 55-60页

作者： LAN Liang yun QIU Chun lin ZHAO De-wen gao Xiu hua du Lin-xiu State Key Laboratory of Rolling and Automation Northeastern University Shenyang 110004 Liaoning China

The recrystallization behavior of a low carbon high niobium microalloyed steel was investigated using continuous and interrupted hot compression tests. The results showed that the initiation of dynamic recrystallization （DRX） could be detected from inflection in the plot of the strain hardening rate against stress regardless of the stress peak appearance. According to the Zener-Hollomon parameter equation, the activity energy of DRX （Qad） was ob tained and a new modified expression calculating Qdef was proposed in consideration of the chemical composition of experimental steel. Applying the 2% offset method, the static softening fraction was determined. The graphic representation of the softening fraction vs interruption time gave the information about the non-static reerystallization temperature （about 1 000℃ ） and the relationship of precipitation time temperature. Static recrystallization kinetics followed the Avrami＇s law at high deformation temperature, and different values of the exponent m were given to illustrate the effect of niobium element on static recrystallization at different deformation temperatures.

关键词： dynamic recrystallization static recrystallization high niobium microalloyed steel activity energy

Feature selection strategy optimization for lithium-ion battery state of health estimation under impedance uncertainties

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Journal of Energy Chemistry 2025年第2期101卷 87-98页

作者： Xinghao du Jinhao Meng Yassine Amirat Fei gao Mohamed Benbouzid UMR CNRS 6027 IRDL University of Brest School of Electrical Engineering Xi'an Jiaotong University LbISEN ISEN Yncréa Ouest School of Energy and Computer Science University of Technology of Belfort-Montbeliard

Battery health evaluation and management are vital for the long-term reliability and optimal performance of lithium-ion batteries in electric *** impedance spectroscopy(EIS) offers valuable insights into battery degradation analysis and ***,previous studies have not adequately addressed the impedance uncertainties,particularly during battery operating conditions,which can substantially impact the robustness and accuracy of state of health(SOH) *** by this,this paper proposes a comprehensive feature optimization scheme that integrates impedance validity assessment with correlation *** utilizing metrics such as impedance residuals and correlation coefficients,the proposed method effectively filters out invalid and insignificant impedance data,thereby enhancing the reliability of the input ***,the extreme gradient boosting(XGBoost) modeling framework is constructed for estimating the battery degradation *** XGBoost model incorporates a diverse range of hyperparameters,optimized by a genetic algorithm to improve its adaptability and generalization *** validation confirms the effectiveness of the proposed feature optimization scheme,demonstrating the superior estimation performance of the proposed method in comparison with four baseline techniques.

关键词： Lithium-ion battery State of health Electrochemical impedance spectroscopy Extreme gradient boosting

Linear Integral Analysis of Bar Rough Rolling by Strain Rate Vector

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Journal of Iron and Steel Research International 2010年第3期17卷 28-33页

作者： DENG Wei ZHAO De-wen QIN Xiao-mei gao Xiu-hua du Lin-xiu LIU Xiang-hua State Key Laboratory of Rolling and Automation Northeastern University Shenyang 110004 Liaoning China

A new linear integral method for bar hot rolling on roughing train was obtained. First, for plastic deformation energy rate, equivalent strain rate about Kobayashi＇s three-dimensional velocity field was expressed by two-dimensional strain rate vector; then, the two-dimensional strain rate vector was inverted into inner product and was integrated term by term. during those processes, boundary equation and mean value theorem were introduced; for friction and shear energy dissipation rate, definite integral was applied to the solution process. Sequentially, the total upper bound power was minimized, and the analytical expressions of rolling torque, separating force, and stress state factor were obtained. The calculated results by these expressions were compared with those of experimental values. The results show that the new linear integral method is available for bar rough rolling analysis and the calculated results by this method are a little higher than those of experimental ones. However, the maximum error between them is less than 10%.

关键词： bar rough rolling linear integration strain rate vector roll separating force

Investigation of bubbles escape behavior from low basicity mold flux for high-Mn high-Al steels using 3D X-ray microscope

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 102-110页

作者： Qiang Liu Xiang Li Shen du Ming gao Yanbin Yin Jiongming Zhang State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

during the continuous casting process of high-Mn high-Al steels,various types of gases such as Ar need to escape through the top of the *** which,the behavior of bubbles traversing the liquid slag serves as a restrictive link,closely associated with viscosity and the thickness of liquid *** contrast to two-dimensional surface observation,three-dimensional(3D)analysis method can offer a more intuitive,accurate,and comprehensive ***,this study employs a 3D X-ray microscope(3D-XRM)to obtained spatial distribution and 3D morphological characteristics of residual bubbles in mold flux under different basicity of liquid slag,different temperatures,and different holding *** results indicate that as basicity of slag increases from 0.52 to 1.03,temperature increases from 1423 to 1573 K,the viscosity of slag decreases,the floating rate of bubbles *** addition,when holding time increases from 10 to 30 s,the bubbles floating distance increases,and the volume fraction and average equivalent sphere diameter of the bubbles solidified in the mold flux gradually *** one word,increasing the basicity,temperature,and holding time leading to an increase in the removal rate of bubbles especially for the *** findings of bubbles escape behavior provide valuable insights into optimizing low basicity mold flux for high-Mn high-Al steels.

关键词： mold flux low basicity bubbles three-dimensional X-ray microscope viscosity

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绿色低碳复合胶凝材料改良路基粉土试验研究

河南科技 2025年第2期52卷 68-71页

作者：徐兴博张晓果董利鹏高度谢海洋河南交投新能源发展有限公司河南郑州450000 河南省中工设计研究院集团股份有限公司河南郑州450000 河南省平原高速公路有限公司河南郑州450000

【目的】为了提高工业固废的利用率,利用工业固废处理路基填料。【方法】采用电石渣、钢渣、磷石膏、铝尾矿等工业固废制备具有水化活性的绿色低碳复合凝胶材料,并对沿黄流域粉土进行改良试验研究。【结果】研究表明,复合胶凝材料具有... 详细信息

【目的】为了提高工业固废的利用率,利用工业固废处理路基填料。【方法】采用电石渣、钢渣、磷石膏、铝尾矿等工业固废制备具有水化活性的绿色低碳复合凝胶材料,并对沿黄流域粉土进行改良试验研究。【结果】研究表明,复合胶凝材料具有一定的水化活性,与水泥相比,其水化活性较低,但对粉土具有良好的固化效果;其凝结时间长对稳定土的施工控制有利;在水中长期浸泡,复合胶凝材料表现出良好的耐水性;在低温养生环境下,复合胶凝材料稳定土较水泥土有优势。【结论】绿色低碳复合胶凝材料改良路基粉土性能优异,具有工程应用价值。

关键词：工业固废绿色低碳复合胶凝材料粉土水化活性耐水性低温养生

Polypropylene-based blend with enhanced breakdown strength under gamma-ray irradiation for cable insulation

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Nuclear Science and Techniques 2025年第1期36卷 35-48页

作者： Bai-Xin Liu Yu gao Jing Li Chen-Yi Guo Bo-Sen Si Jun-Guo gao Yu Chen Bo-Xue du School of Electrical and Information Engineering Tianjin UniversityTianjin 300072China Key Laboratory of Engineering Dielectrics and Its Application Ministry of EducationHarbin University of Science and TechnologyHarbin 150080China State Key Laboratory of Electrical Insulation and Power Equipment Xi’an Jiaotong UniversityXi’an 710049China

This study focuses on the electrical properties and microstructure of polypropylene(PP)-based blends used for cable insulation in nuclear power plants(NPPs).The PP-based blend,comprising isotactic PP and propylene-based elastomer(PBE)at concentrations ranging from 0 to 50 wt%,underwent a melt blending process and subsequent cobalt-60 gamma-ray irradiation with doses ranging from 0 to 250 *** conductivity,trap distribution,and alternating(AC)breakdown strength were chosen to assess the insulation *** results indicate that the addition of PBE significantly improves the electrical properties of PP under *** PP,the electrical conductivity increased with irradiation,whereas the trap depth and breakdown strength decreased ***,for the blend,these changes initially exhibit opposite *** the irradiation was increased to 250 kGy,the AC breakdown strength of the blend improved by more than 21%compared to that of *** physical and chemical structures of the samples were investigated to explore the improvement *** results offer insights into the design of new cable-insulation materials suitable for NPPs.

关键词： Nuclear power plant Cable insulation Polypropylene Electrical properties Gamma-ray irradiation