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Reduction in Microsegregation in Al-Cu Alloy by Alternating Magnetic Field

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Acta Metallurgica Sinica(English Letters) 2020年第2期33卷 267-274页

作者： Sheng-Ya he Chuan-Jun Li Tong-Jun Zhan Wei-Dong Xuan Jiang Wang zhong-ming Ren State Key Laboratory of Advanced Special Steel and School of Materials Science and Engineering Shanghai UniversityShanghai 200444China helmholtz-Zentrum Dresden-Rossendorf(HZDR) 01328 DresdenGermany

The microsegregation behavior of the Al-4.5 wt%Cu alloy solidified at different cooling rates under the alternating magnetic field(AMF) was *** experimental results showed that the amount of non-equilibrium eutectics in the interdendritic region decreased upon applying the AMF at the same cooling *** change in microsegregation could be explained quantificationally by the modifications of dendritic coarsening,solid-state back diffusion and convection in the *** enhanced diffusivity in the solid owing to the AMF was beneficial for the improvement in microsegregation compared to the cases without an *** contrast,the enhanced dendritic coarsening and forced convection in the AMF were found to aggravate the microsegregation *** the contributions of the changes in above factors,an increase in solid diffusivity was found to be primarily responsible for the reduced microsegregation in the *** addition,the microsegregation in the AMF was modeled using the analytical model developed by *** calculated and experimental results were in reasonable agreement.

关键词： Microsegregation Solidification Alternating magnetic field Diffusion Coarsening Convection

Impact toughness variations of EH36 weld metal treated by CaF_(2)–SiO_(2)–MnO submerged arc welding flux

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Journal of Iron and Steel Research International 2023年第9期30卷 1873-1878页

作者： ming zhong Da-ming Guo Somnath Basu Cong Wang Key Laboratory for Ecological Metallurgy of Multimetallic Mineral(Ministry of Education) Northeastern UniversityShenyang 110819LiaoningChina School of Metallurgy Northeastern UniversityShenyang 110819LiaoningChina The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan 430081HubeiChina Department of Metallurgical Engineering and Materials Science Indian Institute of Technology BombayMumbai 400076MaharashtraIndia

Fused ternary CaF_(2)–SiO_(2)–MnO fluxes have been manufactured and applied to join EH36 shipbuilding steel under high heat input submerged arc *** fluxes have been designed to clarify the effect of MnO content in CaF_(2)–SiO_(2)–MnO flux on the impact toughness of the weld metal,with the added amount of MnO from 10 to 50 wt.%at the expense of CaF_(2).With the increase in MnO content,the Charpy impact energy increases first and then decreases,experiencing a maximum value at 30 wt.%*** of the weld metals has also been studied to account for impact toughness *** has been demonstrated that the highest acicular ferrite volume fraction in the weld metal is achieved at 30 wt.%MnO,which is concurrent to the maximum value of Charpy impact *** is believed that the Mn and O content variations in the weld metal contribute synergistically to such an interesting phenomenon.

关键词： Submerged arc welding CaF_(2)–SiO_(2)–MnO flux Shipbuilding steel Impact toughness Microstructure

In situ synthesis of SnPS_(3)/Ti_(3)C_(2)T_(x) hybrid anode via molten salt etching method for superior sodium-ion batteries

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Journal of Energy Chemistry 2024年第11期98卷 623-633页

作者： Longsheng zhong ming Yue Wenhu Xie Hongxiao he Yanhe Xiao Baochang Cheng Liangxu Lin Shuijin Lei School of Physics and Materials Science Nanchang UniversityNanchang 330031JiangxiChina Strait Institute of Flexible Electronics(SIFE Future Technologies)Fujian Normal UniversityFuzhou 350017FujianChina

Recently,SnPS_(3) has gained attention as an impressive sodium-ion battery anode material because of its significant theoretical specific capacity derived from the conversion-alloying reaction ***,its practical applicability is restricted by insufficient rate ability,and severe capacity loss due to inadequate electrical conductivity and dramatic volume *** by the electrochemical enhancement effect of MXene substrates and the innovative Lewis acidic etching for MXene preparation,SnPS_(3)/Ti_(3)C_(2)T_(x) MXene(T=-Cl and-O) is constructed by synchronously phospho-sulfurizing Sn/Ti_(3)C_(2)T_(x) *** from the boosted Na^(+) diffusion and electron transfer rates,as well as the mitigated stress expansion,the synthesized SnPS_(3/)Ti_(3)C_(2)T_(x) composite demonstrates enhanced rate capability(647 mA h g^(-1) at 10 A g^(-1)) alongside satisfactory long-term cycling stability(capacity retention of 94.6% after 2000 cycles at 5 A g^(-1)).Importantly,the assembled sodium-ion full cell delivers an impressive capacity retention of 97.7% after undergoing 1500 cycles at 2 A g^(-1).Moreover,the sodium storage mechanism of the SnPS_(3/)Ti_(3)C_(2)T_(x) electrode is elucidated through in-situ and ex-situ *** work proposes a novel approach to ameliorate the energy storage performance of thiophosphites by facile in-situ construction of composites with MXene.

关键词： Thiophosphites SnPS_(3) Ti_(3)C_(2)T_(x)MXene Lewis acidic etching Sodium-ion batteries

Evolutionary Computation Based Optimization of Image Zernike Moments Shape Feature Vector

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Wuhan University Journal of Natural Sciences 2008年第2期13卷 153-158页

作者： LIU Maofu HU Hujun zhong ming he Yanxiang he Fazhi College of Computer Science and Technology WuhanUniversity of Science and Technology Wuhan 430081 Hubei China School of Computer Wuhan University Wuhan 430072Hubei China

The image shape feature can be described by the image Zernike moments. In this paper, we points out the problem that the high dimension image Zernike moments shape feature vector can describe more detail of the original image but has too many elements making trouble for the next image analysis phases. Then the low dimension image Zernike moments shape feature vector should be improved and optimized to describe more detail of the original image. So the optimization algorithm based on evolutionary computation is designed and implemented in this paper to solve this problem. The experimental results demonstrate the feasibility of the optimization algorithm.

关键词： Zernike moment image Zernike moments shape feature vector image reconstruction evolutionary computation

Research and Application of Flat Roll Technology in the Downstream Stands for CSP

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Journal of Iron and Steel Research International 2011年第4期18卷 30-35页

作者： GUO De-fu he An-rui SHAO Jian YANG Quan WANG zhong-ming WANG bo National Engineering Research Center of Advanced Rolling University of Science and Technology Beijing Beijing 100083 China Hot Strip Plant of Ma'anshan Iron and Steel Co Ltd Ma'anshan 243000 Anhui China

CVC mills are generally used in the whole stands of CSP（Compact Strip Product）.Their special ＂s＂ curve of work roll contour and shifting strategy aimed at controlling strip shape,and the characteristics of continuous casting and rolling production,which make the work roll wear in downstream stands seriously uneven,and easily form abnormal transverse profile at the rolling *** a result,CVC mill configuration in the downstream stands can not meet the profile and flatness control requirement for schedule free rolling,and bring some difficulties in profile and flatness control for the subsequent cold *** on the characteristics of the shape control system of CSP production line,and combined with the theory of flat roll technology,a kind of technology solution of using flat roll in the downsteam stands for CSP hot strip mills was *** last,industrial test was carried out in the last stand of Masteel CSP,and good results were obtained.

关键词： CSP flat roll wear shifting strategy profile flatness

Soil nutrients in relation to vertical roots distribution in the riparian zone of Three Gorges Reservoir,China

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Journal of Mountain Science 2018年第7期15卷 1498-1509页

作者： zhong Rong-hua HU Jin-ming BAO Yu-hai Wang Fei he Xiu-bin Yunnan Key Laboratory of International Rivers and Transboundary Eeo-security Kunming 650091 China Institute oflnternational Rivers and Eco-security Yunnan University Kunming 650091 China Key Laboratory of Mountain Surface Processes and Ecological Regulation Institute of Mountain Hazards and Environment Chinese Academy of Sciences Chengdu 610041 China

Since the impoundment of the Three Gorges Reservoir(TGR), the riparian zone has been subjected to numerous environmental changes. This study was conducted to recognize the distribution of grass roots and its impacts on soil nutrients in the water level fluctuation zone of TGR. Roots of four predominant herbaceous plants in the study area, specifically, Cynodon dactylon, hemarthria altissima, hemarthria compressa, and Paspalum paspaloides, and their corresponding relation with soil nutrient contents were investigated. Root surface area density was determined with Win RHIZO, and the relationships of root distribution with soil depths and soil nutrient contents were studied. The results indicates that most roots are distributed in the top soil layer of 0-10 cm. Estimated root surface area density for the selected grass species ranges from 0.16 to 13.44 cm^2/cm^3, and decreases exponentially with an increase in soil depth. Soil organic matter and total nitrogen contents are significantly lower on bare control area than the corresponding values on the grasslands. Total nutrient contents on grasslands of C. dactylon and H. compressa are higher than those of other grass areas. Root length density and root surface area density are significantly correlated with soil organic matter and total nitrogen content for the four grasslands. The present results suggests that plant roots have significant effects on the distribution of soil nutrients in soil profiles in the riparian zone along the TGR. Nevertheless, additional investigations are needed to reveal the specific interactions between plant roots distribution, soil nutrients and water level fluctuations.

关键词： Roots distribution Soil nutrients Water level fluctuations Riparian zone Root surface area density Root length density

Flotation performances of polymorphic pyrrhotite

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Journal of Central South University 2012年第1期19卷 238-243页

作者： he ming-fei QIN Wen qing LI Wei-zhong JIAO Fen School of Minerals Processing and Bioengineering Central South UniversityChangsha 410083China

The floatability of different crystalline structures of pyrrhotite(monoclinic and hexagonal) was *** is shown that the floatability of monoclinic and hexagonal has obvious difference,and that the flotation recovery of monoclinic pyrrhotite is larger than that of hexagonal pyrrhotite using different *** butyl dithiophosphate is used as the collector,the recovery is larger than that by sodium butyl xanthate and sodium diethyl *** the pH values ranging from 6 to 9,monoclinic pyrrhotite can be floated well,and the flotation recovery is higher than 90%.Monoclinic and hexagonal pyrrhotites are more easily activated by Cu2+ in acidic conditions than in alkaline *** Cu2+ cannot activate hexagonal pyrrhotite using sodium diethyldithiocarbamate as the *** the measurement of contact angle,it is indicated that monoclinic and hexagonal pyrrhotites float well and are easily activated by Cu2+ when dithiophosphate is used as the *** sodium diethyl dithiocarbamate as a collector,the relationship between potential and pH range for pyrrhotite flotation is *** pH 5,the optimal potential range for flotation of monoclinic pyrrhotite is about 125-580 mV(vs She),with the maximum flotation occurring at about 350 mV(vs She);the optimal potential range for flotation of hexagonal pyrrhotite is 200?580 mV(vs She),with the maximum flotation occurring at about 300 mV(vs She).

关键词： flotation pyrrhotite pulp potential contact angle

Future evolution of automated demand response system in smart grid for low-carbon economy

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Journal of Modern Power Systems and Clean Energy 2015年第1期3卷 72-81页

作者： Huaguang YAN Bin LI Songsong CheN ming zhong Dezhi LI Limin JIANG Guixiong he China Electric Power Research Institute Beijing 100192China School of Electric and Electronic Engineering North China Electric Power UniversityBeijing 102206China

Smart grid construction is an important carrier and an effective way to promote the development of lowcarbon *** response(DR)is commonly regarded as an important core technology in smart grid field,and it reflects the flexible and interactive features of the core business in smart *** is the developing direction of automated demand response(ADR)technology,and its main features are the standardization of information exchange,together with the intelligence of decision-making and the automation of *** technology can improve the efficiency of the whole power system and enhance the ability to accept new energy *** paper analyzes the role of demand response in improving efficiency and low-carbon energy saving power *** automated demand response system architecture is investigated,and the ADR roadmap of commercial/industrial and residential customer is *** key technologies for ADR system are analyzed,including demand response strategy,information exchanging model,measurement and verification techniques,and multi-agent scheduling *** ensure the interoperability between the grid side and the user side,the ADR business in smart grid user interface standards is concluded to support further demand side management project.

关键词： Demand response Information model System architecture Load shifting

Arabidopsis ANAC092 regulates auxin-mediated root development by binding to the ARF8 and PIN4 promoters

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Journal of Integrative Plant Biology 2019年第9期61卷 1015-1031页

作者： Dandan Xi Xu Chen Yuxia Wang Ruiling zhong Jianmei he Jiabin Shen Feng ming State Key Laboratory of Genetic Engineering Institute of GeneticsInstitute of Plant BiologySchool of Life SciencesFudan UniversityShanghai 200433China

Auxin is an important plant hormone that is essential for growth and development due to its effects on organogenesis, morphogenesis, tropisms, and apical dominance. The functional diversity of auxin highlights the importance of its biosynthesis, transport, and associated responses. In this study, we show that a NAC transcription factor, ANAC092(also named At NAC2 and ORESARA1),known to positively regulate leaf senescence and contribute to abiotic stress responses, also affects primary root development. Plants overexpressing ANAC092 had altered root meristem lengths and shorter primary roots compared with the wild-type control. Additionally, expression of the pro ANAC092::GUS was strongly induced by indole-3-acetic acid. Quantitative real-time RT-PCR(q RT-PCR) analysis revealed that the YUCCA2, PIN, and ARF expression levels were downregulated in ANAC092-overexpressing plants. Moreover, yeast one-hybrid and chromatin immunoprecipitation assays confirmed that ANAC092 binds to the promoters of AUXIN RESPONSE FACTOR 8(ARF8) and PIN-FORMED 4(PIN4). Furthermore, a dual-luciferase assay indicated that ANAC092 decreases ARF8 and PIN4 promoter activities. We also applied a CRISPR/Cas9 system to mutate ANAC092. The roots of three of the analyzed mutants were longer than normal. Collectively, our findings indicate that ANAC092 negatively affects root development by controlling the auxin pathway.

关键词： pro ARF PIN