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Rare Metals 2022年第8期41卷 2864-2876页

作者： Chen-Liang Chu Wei-Ping Chen Jun-Chen Liu qiang Chen zhi-qiang fu Guangdong Key Laboratory for Advanced Metallic Materials Processing South China University of TechnologyGuangzhou510641China Southwest Technology and Engineering Research Institute Chongqing400039China

Cold rolling and post-deformation annealing(PDA)heat treatments were used to produce heterogeneous grain structures(HGS)in a single-phase face-centered cubic(fcc)Cr_(10)Co_(30)Fe_(30)Ni_(30)high-entropy alloy(HEA).The microstructural evolution and microstructure-property relationship of the HEA were systematically studied under different *** could be achieved in PDA-treated samples at 875℃for 20 s and at 900℃for 20 s(PDA-900-20 s).PDA-900-20 s sample exhibits the most excellent combination of strength and ductility,showing a tensile yield strength of~590 MPa,an ultimate strength of~706 MPa and a total elongation of~23.9%.Additionally,compared with the homogenized counterpart exhibiting homogenous grains,PDA-900-20 s sample displays a notable increment of~413%in yield strength and simultaneously maintains a good *** dominated strengthening mechanisms in PDA-900-20 s sample are grain-boundary strengthening and heterogeneous deformation-induced(HDI)strengthening,whereas the good ductility is mainly resulted from the HDI ***,the present study provides an effective and simple pathway to overcome the strength-ductility tradeoff of typical fcc HEAs through heterogeneous microstructure.

关键词： High-entropy alloy Heterogeneous grain structures Hetero-deformation-induced hardening Mechanical properties Strengthening mechanism

Corrosion behavior of a spark plasma sintered Fe-2OMn-11Al-1.8C- 5Cr alloy in molten aluminum

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Journal of Iron and Steel Research International 2018年第5期25卷 563-571页

作者： Jian Liu Wei-ping Chen Xian-man Zhang zhi-qiang fu Guangdong Key Laboratory for Advanced Metallic Materials Processing South China University of TechnologyGuangzhou 510640 Guangdong China College of Engineering and Technology Normal College ofZunyi Zunyi 563006 Guizhou China Mechanical and Electrical Engineering College Hainan University Haikou 570228 Hainan China

The corrosion behavior of an Fe-20Mn-11Al-1.8C-5Cr alloy prepared by spark plasma sintering was investigated via immersion tests in molten aluminum at 750℃ for 1 and 4 h, respectively, and a hot work steel （AlSI H13） was included as a reference. The experimental results show that the corrosion rate of Fe-20Mn-11Al-1.8C-5Cr alloy is - 24% of that of H13 steel, suggesting that Fe-20Mn-11Al-1.8C-5Cr alloy in molten aluminum possesses better corrosion resistance than H13 steel. Detailed analysis show that k-carbide （（Fe, Mn）3AlCx） and Cr7C3 carbide precipitated in the matrix play a key role in enhancing the corrosion resistance of Fe-20Mn-11Al-1.8C-5Cr alloy in molten aluminum. Both of them show better corrosion resistance than 7-Fe matrix and H13 steel, and can also take on the role of roots in grasping the corrosion product and restrain them from spalling into the molten aluminum.

关键词： Fe-Mn-Al-C-Cr alloy · Molten aluminum. Immersion · Corrosion behavior

Chemokine ligand 20 enhances progression of hepatocellular carcinoma via epithelial-mesenchymal transition

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World Journal of Gastroenterology 2015年第2期21卷 475-483页

作者： Ke-Zhu Hou zhi-qiang fu Hua Gong Department of First General Surgery Shidong Hospital

AIM: To identify the mechanisms of chemokine ligand 20(CCL20)-induced hepatocellular carcinoma(HCC) metastasis and evaluate it as a prognostic marker. METHODS: Expression of CCL20 was evaluated by immunohistochemistry in HCC tissues from 62 patients who underwent curative resection. The relationship between CCL20 expression and clinicopathologic features was analyzed. Univariate and multivariate analyses were performed to evaluate its predictive value for recurrence and survival of HCC patients. The expression levels ofepithelial-mesenchymal transition(EMT)-and signaling pathway-related proteins were evaluated by Western blotting and immunocytochemistry. The effects of CCL20 on HCC cell proliferation and migration were analyzed by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenoltetrazolium bromide(MTT) and Transwell assays. RESULTS: CCL20 immunoreactivity was detected in all 62 patient specimens. CCL20 expression was associated with preoperative alpha-fetoprotein level(P = 0.043), tumor size(P = 0.000), tumor number(P = 0.008), vascular invasion(P = 0.014), and tumor differentiation(P = 0.007). Patients with high CCL20 expression had poorer recurrence-free and overall survivals compared to those with low CCL20 expression(both P < 0.001). CCL20 induced EMT-like changes in HCC cells and increased their proliferation and migration ability(P < 0.05). Western blotting and immunofluorescence staining showed that CCL20 induced an EMT-like phenotype in HCC cells, and increased expression of phosphorylated AKT, β-catenin and vimentin, and decreased E-cadherin expression(P < 0.05). The correlation analysis revealed that high CCL20 expression in HCC tissue specimens was negatively correlated with E-cadherin expression(13.33%, 4/30), and positively correlated with vimentin(90.0%, 27/30), β-catenin(96.67%, 29/30) and p-AKT(76.67%, 23/30) ***: CCL20 expression is associated with HCC recurrence and patient survival and promotes HCC cell proliferation and migration by in

关键词： Chemokine ligand 20 Phosphoinositide kinase-3/AKT

A Time/Space Separation Based 3D fuzzy Modeling Approach for Nonlinear Spatially Distributed Systems

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International Journal of Automation and computing 2018年第1期15卷 52-65页

作者： Xian-Xia Zhang zhi-qiang fu Shao-Yuan Li Tao Zou Bing Wang Shanghai Key Laboratory of Power Station Automation Technology School of Mechatronics and AutomationShanghai University Institute of Automation Shanghai Jiao Tong University Shenyang Institute of Automation Chinese Academy of Sciences

Spatially distributed systems （SDSs） are usually infinite-dimensional spatio-temporal systems with unknown nonlinearities. Therefore, to model such systems is difficult. In real applications, a low-dimensional model is required. In this paper, a time/space separation based 3D fuzzy modeling approach is proposed for unknown nonlinear SDSs using input-output data measurement. The main characteristics of this approach is that time/space separation and time/space reconstruction are fused into a novel 3D fuzzy system. The modeling methodology includes two stages. The first stage is 3D fuzzy structure modeling which is based on Mamdani fuzzy rules. The consequent sets of 3D fuzzy rules consist of spatial basis functions estimated by Karhunen-Love decomposition. The antecedent sets of 3D fuzzy rules are used to construct temporal coefficients. Going through 3D fuzzy rule inference, each rule realizes time/space synthesis. The second stage is parameter identification of 3D fuzzy system using particle swarm optimization algorithm. After an operation of defuzzification, the output of the 3D fuzzy system can reconstruct the spatio-temporal dynamics of the system. The model is suitable for the prediction and control design of the SDS since it is of low-dimension and simple nonlinear structure. The simulation and experiment are presented to show the effectiveness of the proposed modeling approach.

关键词： Spatially distributed system (SDS) system identification 3D fuzzy system Karhunen-Love decomposition particleswarm optimization (PSO).

Microstructure and mechanical properties of as-cast(CuNi)100-xCox medium-entropy alloys

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China Foundry 2022年第6期19卷 511-518页

作者： zhi-yong Yang Wei-ping Chen Liang-yan Hao Chen-liang Chu Da-hai Zeng Wei Xiong zhi-qiang fu Guangdong Key Laboratory for Advanced Metallic Materials Processing South China University of TechnologyGuangzhou 510640China Physical Metallurgy and Materials Design Laboratory Department of Mechanical Engineering and Materials ScienceUniversity of PittsburghPittsburghPA15261USA National Engineering Research Center of Near-net-shape Forming for Metallic Materials South China University of TechnologyGuangzhou 510640China

Microstructure and mechanical properties of non-equiatomic(CuNi)_(100-x)Co_(x)(x=15,20,25 and 30,at.%)medium-entropy alloys(MEAs)prepared by vacuum arc-melting were *** show that all the as-cast MEAs exhibit dual face-centered cubic(fcc)solid-solution phases with identical lattice constant,showing typical dendrite structure consisting of(Ni,Co)-rich phase in dendrites and Cu-rich phase in *** positive enthalpy of mixing among Cu and Ni-Co elements is responsible for the segregation of *** the increase of Co content,the volume fraction of(Ni,Co)-rich phase increases while the Cu-rich phase decreases,resulting in an increment of yield strength and a decrement of elongation for the(CuNi)_(100-x)Co_(x) ***-indentation test results show a great difference of microhardness between the two fcc phases of the *** measured microhardness value of the(Ni,Co)-rich phase is almost twofold as compared to that of the Cu-rich phase in all the(CuNi)_(100-x)Co_(x) *** the deformation of the MEAs,the Cu-rich phase bears the main plastic strain,whereas the(Ni,Co)-rich phase provides more pronounced strengthening.

关键词： medium-entropy alloys microstructure mechanical properties nano-indentation

Linc00675 is a novel marker of short survival and recurrence in patients with pancreatic ductal adenocarcinoma

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World Journal of Gastroenterology 2015年第31期21卷 9348-9357页

作者： Dou-Dou Li zhi-qiang fu Qing Lin Yu Zhou Quan-Bo Zhou zhi-Hua Li Lang-Ping Tan Ru-fu Chen Yi-Min Liu Department of Radiotherapy Sun Yatsen Memorial HospitalSun Yat-sen University Department of Pancreaticobiliary and Hepatobiliary Surgery Sun Yat-sen Memorial HospitalSun Yat-sen University Department of Medical Oncology Sun Yat-sen Memorial HospitalSun Yat-sen University

AIM: To detect linc00675 expression in pancreatic ductal adenocarcinoma(PDAC),to analyze the relationship between the expression level of linc00675 and the clinical pathological characteristics,to explore the biological functions of linc00675,and to determine whether linc00675 has independent prognostic value in ***: We studied linc00675 expression among eight histologically confirmed PDAC tissue samples and four chronic pancreatitis tissue samples through microarray screening. RT-q PCR was conducted to further investigate linc00675 expression in PDAC cell lines as well as archived tissues from a large cohort of PDAC patients. The correlations between the level of lnc00675 and clinicopathological characteristics and survival in patients with pancreatic cancer were evaluated using Correlation analysis. Univariate andmultivariate analyses were conducted to predict whether lnc00675 expression is an independent prognostic and recurrence factor in patients with pancreatic cancer. After downregulating the expression of linc00675 through si RNA,MTT assay,flow cytometry,transwell assay and Western blot were used to explore the biological function of linc00675 in proliferation,invasion,and cell cycle progression of pancreatic cancer cells. The relative molecular expression levels of epithelial-mesenchymal transition were determined by reverse transcription-polymerase chain reaction(RT-PCR) and Western ***: The expression of Linc00675 in PDAC tissue samples was shown to be 672 times that in chronic pancreatitis tissue samples by microarray screening(P = 3.69 × 10-5). This finding was confirmed in tumor tissues from 90 patients with PDAC compared with adjacent normal tissue samples by quantitative RTPCR. We found that linc00675 overexpression positively correlated with lymph node metastasis(P = 0.005),perineural invasion(P = 0.006),and poor survival(P < 0.001). Univariate and multivariate analyses showed that linc00675 expression served as an independent pred

关键词： Linc00675 Long noncoding RNAs Pro-gnosis biomarker

A theoretical study of the effect and mechanism of FeN_(3)-doped biochar for greenhouse gas mitigation

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Biochar 2023年第1期5卷 409-418页

作者： Hong-Rui Wang Wen-Tao Zhou Rui Xiong Kang-Yu Zhong Jing He Xin Ma Qing Wu Pan Long zhi-qiang fu College of Agronomy Hunan Agricultural UniversityChangsha 410128People’s Republic of China College of Chemistry and Chemical Engineering Information and Network CenterCentral South UniversityChangsha 410083China

Paddy fields are a major emission source of greenhouse gases(GHGs)[for instance,methane(CH_(4)),nitrous oxide(N_(2)O),and carbon dioxide(CO_(2))]among agricultural *** has been deemed a potential candidate for the reduction of GHGs in paddy ***,there is no consistent conclusion that biochar can simultaneously reduce emissions of CH_(4),N_(2)O,and CO_(2).Herein,we proposed the FeN_(3)-doped biochar(FG)as an excellent material for GHGs restriction in paddy fields via the first-principles *** computation results indicated that the FG exhibited satisfactory adsorption ability for CH_(4),CO_(2),and N_(2)O,which improved the adsorption energies to−1.37,−1.54,and−2.91 eV,***,the density of state(DOS)analyses revealed that the factor responsible for FeN_(3)-doped biochar to exhibit excellent adsorption ability was the occurrence of drastic energy up-or down-shift of the electron for Fe d,C p,O p,or N p orbital upon adsorption of CH_(4),CO_(2),or N_(2)*** study suggested an advanced modified biochar material for reducing the GHGs emissions in paddy fields,in addition to exploring the adsorption properties and mechanisms of FeN_(3)-doped biochar for GHGs mitigation,which provided a strategy to explore biochar modification and efficient emission reduction materials.

关键词： Modified biochar Fe atoms sorbent Greenhouse gas First-principles calculation Adsorption mechanism

Effect of vacuum heat treatment on microstructure and corrosion behavior of HVOF sprayed AICoCrFeNiCu high entropy alloy

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Journal of Iron and Steel Research International 2023年第8期30卷 1550-1561页

作者： Yong-kuan Zhou l Jia-jie Kang Guo Jin Xiu-fang Cui Jie Zhang Guo-zheng Ma zhi-qiang fu Li-na Zhu Ding-shun She Yu-yun Yang School of Engineering and Technology China University of Geosciences(Beijing)Beijing 100083China School of Materials Science and Engineering Jiangsu University of Science and TechnologyZhenjiang 212100JiangsuChina Zhengzhou Institute China University of Geosciences(Beijing)Zhengzhou 451283HenanChina College of Material Science and Chemical Engineering Harbin Engineering UniversityHarbin 150001HeilongjiangChina Department of Mechanical Engineering Imperial College LondonLondon SW72AZUK National Key Lab for Remanufacturing Academy of Armored Forces EngineeringBeijing 100072China

To improve the corrosion resistance of coalbed methane drilling equipment,an AICoCrFeNiCu high entropy alloy coating was prepared on the AISI 4135(35CrMo)steel substrate by high velocity oxygen fuel(HVOF)technology,and the coating was subjected to vacuum heat treatment(VHT)at different temperatures(500,700,900 and 1100℃).The corrosion test of the substrate and the coatings after VHT in coalbed methane drilling fluid was carried *** results show that the HVOF sprayed AICoCrFeNiCu high entropy alloy(HEA)coating has a good bonding with the substrate,and the porosity of the coating is about 2.4%.There is partial segregation in the coating,and the coating mainly consists of body-centered cubic *** coating has good thermal stability,and the phase structure and microstructure of the coatings have changed after VHT at different *** with the substrate,the as-sprayed coating has better uniform corrosion resistance,and the corrosion resistance of the coating after VHT is further *** VHT at 500℃,the HVOF-sprayed AICoCrFeNiCu HEA coating has the best corrosion resistance.

关键词： High velocity oxygen fuel AICoCrFeNiCu high entropy alloy coating Vacuum heat treatment Microstructure Corrosion

Prediction Model of Soil Nutrients Loss Based on Artificial Neural Network

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Journal of Northeast Agricultural University(English Edition) 2001年第1期8卷 37-42页

作者： WANG zhi-liang,fu qiang,LIANG Chuan (Hydroelectric College,Sichuan University) Hydroelectric College Sichuan University

On the basis of Artificial Neural Network theory, a back propagation neural network with one middle layer is building in this paper, and its algorithms is also given, Using this BP network model, study the case of Malian-River basin. The results by calculating show that the solution based on BP algorithms are consis- tent with those based multiple - variables linear regression model. They also indicate that BP model in this paper is reasonable and BP algorithms are feasible.

关键词： soil Prediction Model of Soil Nutrients Loss Based on Artificial Neural Network

Layered oxide cathodes for sodium-ion batteries: From air stability, interface chemistry to phase transition

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InfoMat 2023年第6期5卷 1-43页

作者： Yi-Feng Liu Kai Han Dan-Ni Peng Ling-Yi Kong Yu Su Hong-Wei Li Hai-Yan Hu Jia-Yang Li Hong-Rui Wang zhi-qiang fu qiang Ma Yan-Fang Zhu Rui-Ren Tang Shu-Lei Chou Yao Xiao Xiong-Wei Wu College of Chemistry and Chemical Engineering Central South UniversityChangshathe People's Republic of China Institute for Carbon Neutralization College of Chemistry and Materials EngineeringWenzhou UniversityWenzhouthe People's Republic of China College of Agronomy School of Chemistry and Materials ScienceHunan Agricultural UniversityChangshathe People's Republic of China Wenzhou Key Laboratory of Sodium-Ion Batteries Wenzhou University Technology Innovation Institute for Carbon NeutralizationWenzhouthe People's Republic of China College of Electrical and Information Engineering Hunan UniversityChangshathe People's Republic of China Hunan Province Yin Feng New Energy Co.Ltd Changshathe People's Republic of China

Sodium-ion batteries(SIBs)are considered as a low-cost complementary or alternative system to prestigious lithium-ion batteries(LIBs)because of their similar working principle to LIBs,cost-effectiveness,and sustainable availability of sodium resources,especially in large-scale energy storage systems(EESs).Among various cathode candidates for SIBs,Na-based layered transition metal oxides have received extensive attention for their relatively large specific capacity,high operating potential,facile synthesis,and environmental ***,there are a series of fatal issues in terms of poor air stability,unstable cathode/electrolyte interphase,and irreversible phase transition that lead to unsatisfactory battery performance from the perspective of preparation to application,outside to inside of layered oxide cathodes,which severely limit their practical *** work is meant to review these critical problems associated with layered oxide cathodes to understand their fundamental roots and degradation mechanisms,and to provide a comprehensive summary of mainstream modification strategies including chemical substitution,surface modification,structure modulation,and so forth,concentrating on how to improve air stability,reduce interfacial side reaction,and suppress phase transition for realizing high structural reversibility,fast Na+kinetics,and superior comprehensive electrochemical *** advantages and disadvantages of different strategies are discussed,and insights into future challenges and opportunities for layered oxide cathodes are also presented.

关键词： air stability interface chemistry layered oxide cathodes phase transition sodium-ion batteries