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Formation and properties of a Zr-based amorphous coating by laser cladding

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Rare Metals 2024年第4期43卷 1809-1814页

作者： Ning Zhang Ying Liu Wei Yang shu-jie Pang Key Laboratory of Aerospace Materials and Performance (Ministry of Education) School of Materials Science and EngineeringBeihang University

(Zr0.53Al0.1Ni0.05Cu0.3Ti0.02)99Y1（at%） coating with amorphous layer of about 180 μm thick was prepared on a steel substrate by using laser cladding method.The coating is compact and shows good metallurgical bonding with substrate.The microstructure,microhardness and corrosion behavior along the depth from the coating surface to the substrate were investigated.It is found that a gradient structure consisted of amorphous surface layer,amorphous-crystalline transitional layer and substrate is formed after the laser cladding.The microhardness and corrosion behavior exhibit variation with the microstructural evolution at different depths from the coating surface.The microhardness and corrosion resistance in 3.5 wt%NaCl solution of the amorphous surface layer are comparable to those of the as-cast Zr-based BMG with the same composition,and higher than those of the steel substrate.

关键词： Laser cladding Amorphous coating Microstructure Hardness Corrosion resistance

Research progress of ferroptosis regulating lipid peroxidation and metabolism in occurrence and development of primary liver cancer

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World Journal of Gastrointestinal Oncology 2024年第6期16卷 2335-2349页

作者： Yu-jie shu Bo Lao Ying-Yang Qiu Department of Gastroenterology Yinzhou District Second HospitalNingbo 315199Zhejiang ProvinceChina Yong Loo Lin School of Medicine National University of SingaporeSingapore 119077Singapore

As a highly aggressive tumor,the pathophysiological mechanism of primary liver cancer has attracted much attention.In recent years,factors such as ferroptosis regulation,lipid peroxidation and metabolic abnormalities have emerged in the study of liver cancer,providing a new perspective for understanding the development of liver cancer.Ferroptosis regulation,lipid peroxidation and metabolic abnormalities play important roles in the occurrence and development of liver cancer.The regulation of ferroptosis is involved in apoptosis and necrosis,affecting cell survival and death.Lipid peroxidation promotes oxidative damage and promotes the invasion of liver cancer cells.Metabolic abnormalities,especially the disorders of glucose and lipid metabolism,directly affect the proliferation and growth of liver cancer cells.Studies of ferroptosis regulation and lipid peroxidation may help to discover new therapeutic targets and improve therapeutic outcomes.The understanding of metabolic abnormalities can provide new ideas for the prevention of liver cancer,and reduce the risk of disease by adjusting the metabolic process.This review focuses on the key roles of ferroptosis regulation,lipid peroxidation and metabolic abnormalities in this process.

关键词： Ferroptosis Lipid peroxidation Primary liver cancer Lipid metabolism Review

Risk Assessment of Deep-Water Horizontal X-Tree Installation

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China Ocean Engineering 2024年第2期38卷 210-220页

作者： MENG Wen-bo FU Guang-ming HUANG Yi LIU shu-jie HUANG Liang GAOYong-hai CNOOC China Limited Zhanjiang BranchZhanjiang 524057China Key Laboratory of Unconventional Oil and Gas Development Ministry of Education(China University of Petroleum(East China))Qingdao 266580China

Due to the high potential risk and many influencing factors of subsea horizontal X-tree installation,to guarantee the successful completion of sea trials of domestic subsea horizontal X-trees,this paper established a modular risk evaluation model based on a fuzzy fault tree.First,through the analysis of the main process oftree down and combining the Offshore&Onshore Reliability Data(OREDA)failure statistics and the operation procedure and the data provided by the job,the fault tree model of risk analysis of the tree down installation was established.Then,by introducing the natural language of expert comprehensive evaluation and combining fuzzy principles,quantitative analysis was carried out,and the fuzzy number was used to calculate the failure probability of a basic event and the occurrence probability of a top event.Finally,through a sensitivity analysis of basic events,the basic events of top events significantly affected were determined,and risk control and prevention measures for the corresponding high-risk factors were proposed for subsea horizontal X-tree down installation.

关键词： subsea horizontal X-tree risk assessment fuzzy fault tree modular risk evaluation model

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Comprehensive Evaluation of Electric Power Prediction Models Based on D-S Evidence Theory Combined with Multiple Accuracy Indicators

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Journal of Modern Power Systems and Clean Energy 2022年第3期10卷 597-605页

作者： Qiong Cui Jizhong Zhu jie shu Lei Huang Zetao Ma School of Electric Power South China University of TechnologyGuangzhouChina Key Laboratory of Renewable Energy Guangzhou Institute of Energy ConversionChinese Academy of SciencesGuangzhouChina

A comprehensive evaluation method of electric power prediction models using multiple accuracy indicators is proposed.To obtain the preferred models,this paper selects a number of accuracy indicators that can reflect the accuracy of single-point prediction and the correlation of predicted data,and carries out a comprehensive evaluation.First,according to Dempster-Shafer(D-S)evidence theory,a new accuracy indicator based on the relative error(RE)is proposed to solve the problem that RE is inconsistent with other indicators in the quantity of evaluation values and cannot be adopted at the same time.Next,a new dimensionless method is proposed,which combines the efficiency coefficient method with the extreme value method to unify the accuracy indicator into a dimensionless positive indicator,to avoid the conflict between pieces of evidence caused by the minimum value of zero.On this basis,the evidence fusion is used to obtain the comprehensive evaluation value of each model.Then,the principle and the process of consistency checking of the proposed method using the entropy method and the linear combination formula are described.Finally,the effectiveness and the superiority of the proposed method are validated by an illustrative instance.

关键词： Dempster-Shafer(D-S)evidence theory multiple accuracy indicators electric power prediction model comprehensive evaluation

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Cluster voltage control method for “Whole County” distributed photovoltaics based on improved differential evolution algorithm

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Frontiers in Energy 2023年第6期17卷 782-795页

作者： Jing ZHANG Tonghe WANG Jiongcong CHEN Zhuoying LIAO jie shu School of Energy Science and Engineering University of Science and Technology of ChinaHefei 230026China Guangzhou Institute of Energy Conversion Chinese Academy of SciencesGuangzhou 510640China Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering Changzhou 213001China

China is vigorously promoting the “whole county promotion” of distributed photovoltaics (DPVs). However, the high penetration rate of DPVs has brought problems such as voltage violation and power quality degradation to the distribution network, seriously affecting the safety and reliability of the power system. The traditional centralized control method of the distribution network has the problem of low efficiency, which is not practical enough in engineering practice. To address the problems, this paper proposes a cluster voltage control method for distributed photovoltaic grid-connected distribution network. First, it partitions the distribution network into clusters, and different clusters exchange terminal voltage information through a “virtual slack bus.” Then, in each cluster, based on the control strategy of “reactive power compensation first, active power curtailment later,” it employs an improved differential evolution (IDE) algorithm based on Cauchy disturbance to control the voltage. Simulation results in two different distribution systems show that the proposed method not only greatly improves the operational efficiency of the algorithm but also effectively controls the voltage of the distribution network, and maximizes the consumption capacity of DPVs based on qualified voltage.

关键词： distributed photovoltaics(DPVs) cluster partitioning improved differential evolution algorithm voltage control consumption capacity of distributed photovoltaics

高强度间歇训练(HIIT)可能通过改变小鼠mTORC1、PPARα和FGF21表达诱导肝酮体生成

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生理学报 2024年第2期76卷 224-232页

作者：刘俊娄淑杰上海体育大学运动健康学院上海200438

本文旨在研究6周高强度间歇训练(high-intensity interval training,HIIT)干预后小鼠肝脏酮体生成情况,并探讨可能的作用机制。将7周龄雄性C57BL/6J小鼠随机分为对照组和HIIT组,对照组不进行运动,而HIIT组接受为期6周HIIT(坡度为10°的... 详细信息

本文旨在研究6周高强度间歇训练(high-intensity interval training,HIIT)干预后小鼠肝脏酮体生成情况,并探讨可能的作用机制。将7周龄雄性C57BL/6J小鼠随机分为对照组和HIIT组,对照组不进行运动,而HIIT组接受为期6周HIIT(坡度为10°的跑台运动),记录体重和体成分的变化,在一次HIIT运动前、运动后即刻、运动后1 h检测血液酮体水平。6周HIIT后,用试剂盒检测肝脏和血清中游离脂肪酸的水平,用qPCR和Western blot检测小鼠肝脏酮体生成调节因子和关键酶表达情况。结果显示,与HIIT前相比,一次HIIT后即刻、HIIT后1 h HIIT组小鼠血酮体水平显著上升。对照组小鼠的体重在6周内逐渐增加,HIIT组小鼠体重没有显著增加。6周HIIT结束之后,与对照组相比,HIIT组体脂比显著降低,而瘦体重占比显著增加,肝脏和血清游离脂肪酸水平显著升高,肝脏肉碱棕榈酰转移酶-I(carnitine palmitoyl transferase-I,CPT-I)、过氧化物酶体增殖物激活受体α(peroxisome proliferator-activated receptorα,PPARα)和成纤维细胞生长因子21(fibroblast growth factor 21,FGF21)蛋白表达水平显著上调,哺乳动物雷帕霉素靶蛋白复合体1(mammalian target of rapamycin complex 1,mTORC1)蛋白表达显著下调。以上结果提示,HIIT可能通过改变mTORC1、PPARα和FGF21表达来诱导小鼠肝酮体的生成。

关键词：高强度间歇训练酮体 mTORC1 PPARα FGF21

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Enabling nickel ferrocyanide nanoparticles for highperformance ammonium ion storage

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Frontiers of Chemical Science and Engineering 2023年第2期17卷 226-235页

作者： Haoxiang Yu Leiyu Fan Chenchen Deng Huihui Yan Lei Yan jie shu Zhen-Bo Wang MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringState Key Lab of Urban Water Resource and EnvironmentHarbin Institute of TechnologyHarbin 150001China School of Materials Science and Chemical Engineering Ningbo UniversityNingbo 315211China

Prussian blue and its analogs are extensively investigated as a cathode for ammonium-ion batteries.However,they often suffer from poor electronic conductivity.Here,we report a Ni_(2)Fe(CN)_(6)/multiwalled carbon nanotube composite electrode material,which is prepared using a simple coprecipitation approach.The obtained material consists of nanoparticles with sizes 30-50 nm and the multiwalled carbon nanotube embedded in it.The existence of multiwalled carbon nanotube ensures that the Ni_(2)Fe(CN)_(6)/multiwalled carbon nanotube composite shows excellent electrochemical performance,achieving a discharge capacity of 55.1 mAh·g^(-1)at 1 C and 43.2 mAh·g^(-1)even at 15 C.An increase in the ammoniumion diffusion coefficient and ionic/electron conductivity based on kinetic investigations accounts for their high performance.Furthermore,detailed ex situ characterizations demonstrate that Ni_(2)Fe(CN)_(6)/multiwalled carbon nanotube composite offers three advantages:negligible lattice expansion during cycling,stable structure,and the reversible redox couple.Therefore,the Ni_(2)Fe(CN)_(6)/multiwalled carbon nanotube composite presents a long cycling life and high rate capacity.Finally,our study reports a desirable material for ammonium-ion batteries and provides a practical approach for improving the electrochemical performance of Prussian blue and its analogs.

关键词： nickel ferrocyanides NH_(4)^(+) electrochemistry Prussian blue aqueous ammonium ion batteries

Multi-functional stainless steel composite frames stabilize the sodium metal battery

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Journal of Materials Science & Technology 2023年第18期149卷 112-118页

作者： Laiping Li Yusheng Luo Wenlu Yuan Peizhi Mou Qi Wu Lin Zhang Yong Chen jie shu Liyuan Zhang School of Materials Science and Chemical Engineering Ningbo UniversityNingbo 315211China

The sodium(Na)metal battery has the prospect of promising high energy density and sustainable tech-nology for low-cost energy storage.However,the soft texture and high reactivity of Na cause it easy to structure collapse and produce side reactions with organic electrolytes.Inspired by ancient Chinese ar-chitecture,a structural engineering strategy is introduced to conquer the above issues.PVDF film-covered stainless steel mesh(SMPF)embedded in the obverse of Na metal to form a“self-limiting”Na/electrolyte interface and bare stainless steel mesh(SM)with high electronic conductivity embedded in the reverse of Na metal to form a uniformly electronic distributed Na/collector interface.Based on the electric field simulation and in-situ optical tests,the well-designed structure of the SM@Na@SMPF electrode can re-strict the dendrite growth and slow down the bubbles release.The above strategies provide important technical support for the large-scale application of flexible Na metal batteries.

关键词： Sodium metal battery Stainless steel mesh Self-limiting Electric field simulation Bubbles release

Organic interlayer engineering of TiS_(2) for enhanced aqueous Zn ions storage

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Journal of Materials Science & Technology 2023年第9期140卷 135-141页

作者： Chengcheng Huang Yiwen Liu Jing Li Zhonghao Miao Xinhao Cai Zhouxiang Wu Haoxiang Yu Lei Yan Liyuan Zhang jie shu School of Materials Science and Chemical Engineering Ningbo UniversityNingbo 315211China

Aqueous rechargeable zinc-ion batteries(ARZIBs)have a bright future for energy storage due to their high energy density and safety.However,for traditional ARZIBs,cathode materials always suffer from the limited space for large-sized zinc ions storage and transport,leading to low Coulombic efficiency and inferior cycling performance.To build a reliable host with large tunnel,1-butyl-1-methylpyrrolidinium ion(PY14^(+))pre-intercalated TiS_(2)(PY14^(+)-TiS_(2))is designed as an alternative intercalation-type electrode.As the insertion organic guest widens the interlayer space of TiS_(2)and buffers the lattice stress generated during the electrochemical cycles,the structural reversibility,cycling stability and kinetics properties of PY14^(+)-TiS_(2) are enhanced greatly.A specific capacity of 130.9 mAh g^(−1) with 84.3%capacity retention over 500 cycles can be achieved at 0.1 A g^(−1).Therefore,this study paves the way for enhancing the aqueous Zn ions storage capability by organic interlayer engineering.

关键词： Pre-intercalation Organic interlayer engineering TiS_(2) Intercalation-type electrode Aqueous zinc-ion batteries