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Transactions of Nonferrous Metals Society of China 2024年第9期34卷 3002-3015页

作者： wei-di ZHANG Meng-jie TIAN wei SUN School of Minerals Processing and Bioengineering Central South UniversityChangsha 410083China State Key Laboratory of Mineral Processing Beijing 102600China Hubei Key Laboratory for Efficient Utilization and Agglomeration of Metallurgic Mineral Resources Wuhan 430081China Key Laboratory of Hunan Province for Clean and Efficient Utilization of Strategic Calcium-containing Mineral Resources Central South UniversityChangsha 410083China

A novel hydroxamic acid,N-hydroxy-9,10-epoxy group-octadecanamide(N-OH-9,10-O-ODA),was synthesised by modifying the structure of oleic *** carboxyl group of oleic acid was converted into an N-hydroxy amide group,and an epoxy group was introduced into its structure.N-OH-9,10-O-ODA was used as a novel collector in the flotation separation of spodumene from one of its associated gangue minerals,specifically albite.N-OH-9,10-O-ODA exhibits remarkable selectivity,with a stronger affinity for collecting spodumene particles compared to albite *** potential measurements and X-ray photoelectron spectroscopic analysis reveal that the adsorption quantity of N-OH-9,10-O-ODA on spodumene surface is comparable to that on albite ***-principles calculations demonstrate the diverse adsorption configurations of N-OH-9,10-O-ODA on surfaces of spodumene and albite,leading to its distinct collecting abilities for spodumene and albite particles.

关键词： N-hydroxy-9,10-epoxy group-octadecanamide spodumene albite flotation separation oleic acid

Texture and Se vacancy optimization induces high thermoelectric performance in Bi_(2)Se_(3) flexible thin films

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Rare Metals 2024年第6期43卷 2796-2804页

作者： Dong-wei Ao wei-di Liu Yue-Xing Chen Fan Ma Yi-Jie Gu Zhuang-Hao Zheng School of Machinery and Automation Weifang UniversityWeifang 261061China Australian Institute for Bioengineering and Nanotechnology The University of QueenslandBrisbane 4072Australia Shenzhen Key Laboratory of Advanced Thin Films and Applications Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen518060China School of Materials Science and Engineering Inner Mongolia University of TechnologyHohhot 010051China

Bi_(2)Se_(3)-based flexible thin film with high thermoelectric performance is promising for the waste heat recovery *** this work,a novel post-selenization method is employed to prepare n-type Bi_(2)Se_(3)flexible thin films with highly textured *** strengthened texture and Se vacancy optimization can be simultaneously achieved by optimizing the selenization *** highly oriented texture leads to the increased carrier mobility and results in a high electric conductivity of~290.47 S·cm^(-1)at 623 ***,a high Seebeck coefficient(>110μW·K-1)is obtained due to the reduced carrier concentration,induced by optimizing vacancy ***,a high power factor of 3.49μW·cm^(-1)·K^(-2)at 623 K has been achieved in asprepared highly-bendable Bi_(2)Se_(3)flexible thin films selenized at 783 *** study introduces an effective post-selenization method to tune the texture structure and vacancies of Bi_(2)Se_(3)flexible thin films,and correspondingly achieves high thermoelectric performance.

关键词： Thermoelectric Bi_(2)Se_(3) Flexible thin film Post-selenization

Investigation of wake-induced vibration interference between two staggered wave-cone cylinders at subcritical Reynolds number

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Journal of Hydrodynamics 2024年第2期36卷 378-393页

作者： Lin Zou di-wei Liu Jian Liu Hong-cheng Zuo Yin-huan Zheng Hao Xia School of Mechanical and Electronic Engineering Wuhan University of TechnologyWuhan430070China Department of Aeronautical and Automotive Engineering Loughborough UniversityLoughboroughUK

The wake induced vibration(WIV)of a one-and two-degree-of-freedom(1DOF,2DOF)downstream wave-cone cylinder(WCC)behind a stationary equal-size upstream wave-cone cylinder in the staggered arrangement is numerically investigated at subcritical Reynolds number of 3900 by using shear stressed transfer(SST)k-ωturbulence *** streamwise pitch ratios(P/Dm)vary from 4 to 6 with a fixed incident angleα=8°.Experimental measurements were also performed for the validation of the present numerical *** is found that the largest vibration amplitude in crossflow direction occurred at P/Dm=4,Ur=8 with small difference of streamwise vibration at P/Dm=4,*** from single wavy-cone cylinder(SWCC),the downstream flexible one of a pair staggered WCCs got larger vibration amplitude during phase switching stage instead of in-phase *** upstream wake will suppress the triple frequency of main frequency in the power spectra density(PSD)functions of Cl but stimulate the double one of *** intriguing vibration mechanism happened in all 2DOF cases where the trajectory of downstream WCC is a significant ellipse rather than a figure of *** transformation of phase switching and the variation of the main frequency of drag coefficient(Cd)can be explained by the vortex-shedding modes of downstream WCC.

关键词： Two wave-cone cylinders staggered arrangement wake induced vibration phase switching vortex shedding

Approaching Ultimate Synthesis Reaction Rate of Ni-Rich Layered Cathodes for Lithium-Ion Batteries

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Nano-Micro Letters 2024年第10期16卷 392-402页

作者： Zhedong Liu Jingchao Zhang Jiawei Luo Zhaoxin Guo Haoran Jiang Zekun Li Yuhang Liu Zijing Song Rui Liu wei-di Liu Wenbin Hu Yanan Chen School of Materials Science and Engineering Tianjin UniversityTianjin 300072People's Republic of China School of Materials Science and Engineering Shandong University of Science and TechnologyQingdao 266590People's Republic of China Australian Institute of Bioengineering and Nanotechnology The University of QueenslandSt LuciaQLD 4072Australia

Nickel-rich layered oxide LiNi_(x)Co_(y)MnzO_(2)(NCM,x+y+z=1)is the most promising cathode material for high-energy lithium-ion ***,conventional synthesis methods are limited by the slow heating rate,sluggish reaction dynamics,high energy consumption,and long reaction *** overcome these chal-lenges,we first employed a high-temperature shock(HTS)strategy for fast synthesis of the NCM,and the approaching ultimate reaction rate of solid phase transition is deeply investigated for the first *** the HTS process,ultrafast average reaction rate of phase transition from Ni_(0.6)Co_(0.2)Mn_(0.2)(OH)_(2) to Li-containing oxides is 66.7(%s^(-1)),that is,taking only 1.5 *** ultrahigh heating rate leads to fast reaction kinetics,which induces the rapid phase transition of NCM *** HTS-synthesized nickel-rich layered oxides perform good cycling performances(94%for NCM523,94%for NCM622,and 80%for NCM811 after 200 cycles at 4.3 V).These findings might also assist to pave the way for preparing effectively Ni-rich layered oxides for lithium-ion batteries.

关键词： Nickel-rich layered oxides High-temperature shock Solid reaction kinetics Phase transition Reaction rate

Graphene/Molybdenum dichalcogenide-Based van der Waals Heterostructure Photodetectors: a Review

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新型炭材料(中英文) 2024年

作者： ZHANG Xin-hua LIU wei-di GONG You-pin LIU Qing-feng CHEN Zhi-Gang Center of Quantum Materials and Devices at Institute of Advanced Interdisciplinary Studies Soft Matter and Interdisciplinary Research Center College of Physics Chongqing University School of Chemistry and Physic ARC Research Hub in Zero-emission Power Generation for Carbon Neutrality and Center for Materials Science Queensland University of Technology State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical Engineering Nanjing Tech University

Graphene is widely used in photodetection due to its high carrier mobility and wide spectral absorption ***, the high dark current due to its low light absorption severely limits the performance of photodetection. Molybdenum dihalide(MoX2, X= S, Se and Te) has a high absorption coefficient, which can compensate high dark current in graphene-based photodetectors and result in outstanding photoelectronic properties in graphene/MoX2 van der Waals heterostructure(vdWH) *** this review, we firstly review working principles, performance indicators, and structures of photodetectors. After that, the significance of graphene/MoX2 vdWH photodetectors are highlighted from the material fundamental perspective. Preparation methodologies and performance enhancement strategies of graphene/MoX2 vdWH photodetectors are correspondingly summarized. In the end, we highlight the current challenges and future directions of the graphene/MoX2 vdWH photodetectors. This review will guide the design of high-performance vdWH photodetectors.

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Electronic-scale assessment of high-temperature oxidation mechanisms in a novel Fe-based alloy

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Journal of Iron and Steel Research International 2024年第4期31卷 982-997页

作者： wei-di Luo Ting-ping Hou Xuan Liang Dong Zhang Heng-fu Lin Yu Li Tian-liang Zhao Cheng-yang Hu Serhii Yershov Kai-ming Wu The State Key Laboratory of Refractories and Metallurgy.Wuhan University of Science and Technology.Wuhan 430081 HubeiChina Hubei Province Key Laboratory of Systems Science in Meallurgial Process Wuhan University of Science and Technology.Wuhan 430081.Hubei.China International Research Institute for Steel Technology Wuhan University of Science and Technology.Wuhan 430081.HubeiChina Collaborative Innovation Center for Advanced Steels w uhan University of Science and Technology.Wuhan 430081.HuleiChina

The development of alloys with high antioxidation performance is limited by the ambiguous details of the oxidation ***,based on the structures of internal oxides detected by high-resolution transmission electron microscopy,a hybrid method combining first-principles calculation,climb image nudged elastic band method and quasi-harmonic Debye model has been implemented to explain the oxidation mechanism with an emphasis on the origin of delamination and *** results showed that the delamination of oxides corresponds to the acceleration of diffusion of Cr element caused by lamellar *** reduction in the cracking occurrence at high temperature mainly results from the smaller bulk modulus of ***,the stronger chemical bonds promoted by lamellar structures also correspond to the higher crackingresistance.

关键词： Oxidation Crystal structure diffusion Cracking-First-principles calculation

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顺层岩质滑坡形成机制试验研究

岩石力学与工程学报 2024年第S01期43卷 3354-3362页

作者：张科狄巍张凯昆明理工大学电力工程学院云南昆明650500 昆明理工大学建筑工程学院云南昆明650500

顺层岩质滑坡形成机制一直是滑坡研究的重点和难点。为研究顺层岩质滑坡演化过程及失稳机制,构建理想概化模型;开展冰冻试验,结合数字图像相关(diC)方法对顺层岩质滑坡全过程进行非接触式、实时变形观测。基于diC计算所得的全场变形数据... 详细信息

顺层岩质滑坡形成机制一直是滑坡研究的重点和难点。为研究顺层岩质滑坡演化过程及失稳机制,构建理想概化模型;开展冰冻试验,结合数字图像相关(diC)方法对顺层岩质滑坡全过程进行非接触式、实时变形观测。基于diC计算所得的全场变形数据,提出一种精细化描述顺层岩质边坡后缘张开段和剪切滑移段相对位移演化规律的方法。研究表明:顺层岩质滑坡在失稳过程中经历了初始变形、后缘张开、剪切滑移、整体贯通4个阶段。应变局部化带最先产生于后缘张开段浅部,而后从浅部向深部发展至潜在滑带后缘,并从后缘不断向前缘发展,最后贯通导致整体发生失稳破坏,展现出由浅部到深部、由后缘向前缘、由局部到整体的演化特征。此外,讨论了滑带倾角对顺层岩质边坡失稳的影响规律,发现失稳时间随滑带倾角的增加而缩短。基于diC监测的研究方法为量化揭示顺层岩质滑坡形成机制提供一种新的思路。

关键词：边坡工程顺层岩质滑坡冰冻试验数字图像相关应变局部化带相对位移演化量化

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生鲜农产品供应链F2C模式分析

保鲜与加工 2024年第4期24卷 54-60页

作者：张运韦迪湖南工业大学商学院湖南株洲412007

我国生鲜农产品消费市场规模庞大,但生鲜农产品供应链各环节中存在诸多问题。为了提升生鲜农产品生产者和消费者的利益,对比了不同的生鲜农产品供应链模式及特点,重点分析了F2C供应链模式的优点及可行性。以沱沱工社的F2C供应链管理模... 详细信息

我国生鲜农产品消费市场规模庞大,但生鲜农产品供应链各环节中存在诸多问题。为了提升生鲜农产品生产者和消费者的利益,对比了不同的生鲜农产品供应链模式及特点,重点分析了F2C供应链模式的优点及可行性。以沱沱工社的F2C供应链管理模式作为参考,结合生鲜农产品的特点,针对生鲜农产品F2C供应链模式存在的问题,提出相应的解决对策,以期为搭建适合我国的生鲜农产品供应链模式提供参考。

关键词：生鲜农产品供应链 F2C模式

不同归经寄主桑寄生对去卵巢骨质疏松大鼠的骨保护作用及机制

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中国实验方剂学杂志 2024年第7期30卷 112-120页

作者：韦迪张维琦莫琼韦少宣覃文慧广西中医药大学药学院南宁530200 广西中医药大学广西中药药效研究重点实验室南宁530001 广西中医药大学第一附属医院南宁530200 桂林市人民医院广西桂林541002

目的:比较不同归经寄主桑寄生对去卵巢骨质疏松大鼠骨微观结构、骨代谢的影响,并探析其作用机制。方法:选取88只SPF级雌性SD大鼠,随机分为11组:假手术组,模型组,桑树寄生低、中、高剂量组(2.5、5、10 g·kg^(-1)),肉桂寄生低、中、高剂... 详细信息

目的:比较不同归经寄主桑寄生对去卵巢骨质疏松大鼠骨微观结构、骨代谢的影响,并探析其作用机制。方法:选取88只SPF级雌性SD大鼠,随机分为11组:假手术组,模型组,桑树寄生低、中、高剂量组(2.5、5、10 g·kg^(-1)),肉桂寄生低、中、高剂量组(2.5、5、10 g·kg^(-1)),阴香寄生低、中、高剂量组(2.5、5、10 g·kg^(-1))。药物干预12周后进行取材,使用双能X射线骨密度仪(DXA)和微计算机断层扫描(Micro-CT)检测大鼠股骨近端骨密度及骨微结构情况;苏木素-伊红(HE)染色观察大鼠股骨组织病理学变化;采用酶联免疫吸附测定法(ELISA)检测大鼠血清中雌二醇(E_(2))、骨钙素(BGP)、骨碱性磷酸酶(BALP)、抗酒石酸酸性磷酸酶(TRACP-5b)、Ⅰ型前胶原氨基端原肽(PINP)的含量;实时荧光定量聚合酶链式反应(Real-time PCR)检测大鼠肱骨中骨形态发生蛋白-2(BMP-2)、Smad1、Smad9、Runt相关转录因子2(Runx2)的mRNA表达;蛋白免疫印迹法(Western blot)检测大鼠肱骨中BMP-2、p-Smad1/5/9、Runx2蛋白表达量。结果:与假手术组比较,模型组大鼠股骨微结构明显破坏,骨密度(BMD)、骨体积分数(BV/TV)、骨小梁数量(Tb.N)、骨小梁厚度(***)显著下降(P<0.01),骨小梁分离度(***)、结构模型指数(SMI)显著上升(P<0.01);血清中BGP、BALP、TRACP-5b和PINP含量明显升高(P<0.05,P<0.01),E_(2)含量显著降低(P<0.01);大鼠肱骨中BMP-2、Smad1、Smad9、Runx2 mRNA表达显著降低(P<0.01),BMP-2、p-Smad1/5/9、Runx2蛋白表达显著降低(P<0.01)。与模型组比较,不同归经寄主桑寄生给药组均能提升骨质疏松大鼠股骨BMD和BV/TV、Tb.N、***,降低***、SMI,改善骨微结构,提高骨质疏松大鼠血清E_(2)含量(P<0.05,P<0.01),降低骨质疏松大鼠血清BGP、BALP、TRACP-5b、PINP含量,上调BMP-2、Smad1、Runx2 mRNA表达,上调Smad9 mRNA表达(P<0.05,P<0.01),上调BMP-2、p-Smad1/5/9、Runx2的蛋白表达(P<0.01);其中多项指标显示肉桂寄生组效果最好。结论:不同归经寄主桑寄生均可改善去卵巢大鼠的骨质疏松症,其中肉桂寄生给药组药效最佳,其治疗骨质疏松症可能是通过调控BMP/Smad信号通路,调节骨转换的平衡。

关键词：桑寄生不同归经寄主骨质疏松骨密度骨形态发生蛋白(BMP)/Smad通路

采煤机高精度轨迹跟踪控制系统设计及仿真分析

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机械管理开发 2024年第2期39卷 227-229页

作者：狄玮山西华阳集团新能股份有限公司二矿山西阳泉045000

为解决采煤机无法根据煤岩条件对其截割高度进行自主、高精度控制的问题,以MG300/711-WD采煤机为研究对象,在对其调高系统液压分系统进行改进的基础上,提出了基于煤岩识别的高精度轨迹跟踪控制系统,并为其配套基于速度前馈的PID控制策略... 详细信息

为解决采煤机无法根据煤岩条件对其截割高度进行自主、高精度控制的问题,以MG300/711-WD采煤机为研究对象,在对其调高系统液压分系统进行改进的基础上,提出了基于煤岩识别的高精度轨迹跟踪控制系统,并为其配套基于速度前馈的PID控制策略,降低了采煤机截割岩层的风险。

关键词：采煤机高精度轨迹跟踪控制液压系统 PID控制控制误差