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Advancing green flotation:Separation of Cu-Pb minerals through the application of eco-friendly organic double reaction group depressant

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International Journal of Mining Science and Technology 2024年第11期34卷 1599-1611页

作者： Siqi Yang Xianping Luo Rufeng Chen Louyan Shen Xun Fan jiancheng miao Xuekun Tang Jiangxi Provincial Key Laboratory of Low-Carbon Processing and Utilization of Strategic Metal Mineral Resources Jiangxi University of Science and TechnologyGanzhou 341000China Faculty of Resource and Environmental Engineering Jiangxi University of Science and TechnologyGanzhou 341000China Key Laboratory of Efficient Exploitation and Utilization of Rare Metal Resources of Jiangxi Province Jiangxi University of Science and TechnologyGanzhou 341000China Nanjing Yinmao Lead-Zinc Mining Co. Ltd.Nanjing 210046China China Nerin Engineering Co. Ltd.Nanchang 330031China

Achieving efficient flotation separation of chalcopyrite and galena while maintaining environmental friendliness poses a *** study utilized the environmentally friendly copolymer acrylic acid-2-acrylamide-2-methylpropanesulfonic acid(AA/AMPS)as a depressant to separate chalcopyrite and *** tests revealed a significant reduction in galena recovery when AA/AMPS was employed,with minimal impact observed on *** artificial mixed ore flotation,AA/AMPS was found to enhance the efficiency of copper and lead separation,surpassing K_(2)Cr_(2)O_(7).Furthermore,the effectiveness of AA/AMPS in facilitating copper-lead separation has been validated in practical ore *** presence of AA/AMPS inhibited the adsorption of SBX onto galena,as confirmed by zeta potential and contact angle ***,the adsorption on chalcopyrite remained *** analyses using Atomic Force Microscope,X-ray photoelectron spectroscopy,and Density Functional Theory,a robust chemical interaction between the reactive groups in AA/AMPS and Pb sites on galena was uncovered,resulting in the formation of a hydrophilic polymer *** layer impedes SBX adsorption and reduces galena's *** contrast,no significant chemical adsorption was observed between AA/AMPS and Cu and Fe sites on chalcopyrite,preserving its SBX ***,AA/AMPS shows promise in replacing traditional depressants for Cu-Pb sulfide ore separation,enhancing environmental sustainability.

关键词： AA/AMPS Double reactive group Actual ore Selective depressant Galena

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多柔体系统响应计算的子循环计算方法研究

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力学学报 2008年第4期40卷 511-519页

作者：缪建成朱平陈关龙朱大炜上海交通大学机械与动力工程学院

过去近30年中,柔性多体系统动力学研究取得了巨大的进展,人们的兴趣集中在柔性多体系统建模、计算及实验研究等3个方面.Belytschko等于1979年提出的子循环算法已经成功地应用于结构动力响应的有限元计算中,然而有关柔性多体动力学的子... 详细信息

过去近30年中,柔性多体系统动力学研究取得了巨大的进展,人们的兴趣集中在柔性多体系统建模、计算及实验研究等3个方面.Belytschko等于1979年提出的子循环算法已经成功地应用于结构动力响应的有限元计算中,然而有关柔性多体动力学的子循环算法研究尚未见报道.该文提出了一种适合于柔性多体系统响应计算的中心差分类子循环算法,在将非线性微分-代数混合方程组(DAEs)缩并为纯微分方程组(ODE)的基础上,推导出快、慢变分量的同步更新公式和子步更新公式;在变量的数值积分过程中,采用能量平衡计算检查算法的稳定性;算例结果表明该算法可以在保持合适的精度要求下,有效地提高响应的计算效率;对积分步长进行摄动修正可以保持算法的稳定性.

关键词：柔性多体系统动力学 DAEs方程中心差分法子循环算法能量平衡稳定性分析

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基于Newmark格式的多柔体系统子循环算法研究

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固体力学学报 2008年第2期29卷 193-199页

作者：缪建成朱平陈关龙朱大炜上海交通大学机械与动力工程学院

提出一种基于Newmark积分格式的FMD(Flexible Multi-body Dynamics)子循环算法,可用于求解缩并型的FMD方程.推导了FMD方程中快变分量和慢变分量的同步更新及子步更新公式;在积分过程中,采用能量平衡计算校验算法的稳定性;结果表明该算... 详细信息

提出一种基于Newmark积分格式的FMD(Flexible Multi-body Dynamics)子循环算法,可用于求解缩并型的FMD方程.推导了FMD方程中快变分量和慢变分量的同步更新及子步更新公式;在积分过程中,采用能量平衡计算校验算法的稳定性;结果表明该算法可以在保持合适的精度要求下,有效地提高计算效率.

关键词：多柔体动力学缩并型FMD方程 Newmark积分子循环算法稳定性

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Occurrence of phthalate esters in the yellow and Yangtze rivers of china:Risk assessment and source apportionment

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Journal of Environmental Sciences 2025年第3期149卷 628-637页

作者： Qinkui miao Wenxiang Ji Huiyu Dong Ying Zhang College of Environmental Science and Engineering Nankai UniversityTianjin 300350China Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China

Phthalate esters(PAEs),recognized as endocrine disruptors,are released into the environment during usage,thereby exerting adverse ecological *** study investigates the occurrence,sources,and risk assessment of PAEs in surface water obtained from 36 sampling points within the Yellow River and Yangtze River *** total concentration of PAEs in the Yellow River spans from124.5 to 836.5 ng/L,with Dimethyl phthalate(DMP)(75.4±102.7 ng/L)and Diisobutyl phthalate(DiBP)(263.4±103.1 ng/L)emerging as the predominant *** exhibit a pattern of upstream(512.9±202.1 ng/L)>midstream(344.5±135.3 ng/L)>downstream(177.8±46.7 ng/L).In the Yangtze River,the total concentration ranges from 81.9 to 441.6 ng/L,with DMP(46.1±23.4 ng/L),Diethyl phthalate(DEP)(93.3±45.2 ng/L),and DiBP(174.2±67.6 ng/L)as the primary *** levels follow a midstream(324.8±107.3 ng/L)>upstream(200.8±51.8 ng/L)>downstream(165.8±71.6 ng/L)*** should be directed towards the moderate ecological risks of DiBP in the upstream of HH,and both the upstream and midstream of CJ need consideration for the moderate ecological risks associated with Di-n-octyl phthalate(DNOP).Conversely,in other regions,the associated risk with PAEs is either low or *** main source of PAEs in Yellow River is attributed to the release of construction land,while in the Yangtze River Basin,it stems from the accumulation of pollutants in lakes and forests discharged into the *** findings are instrumental for pinpointing sources of PAEs pollution and formulating control strategies in the Yellow and Yangtze Rivers,providing valuable insights for global PAEs research in other major rivers.

关键词： Phthalates Spatial variation Potential sources Risk assessment

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Decision making module based on stochastic magnetic tunnel junctions

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Science China(Physics,Mechanics & Astronomy) 2025年第1期68卷 198-205页

作者： Yifan miao Li Zhao Yajun Zhang Zhe Yuan Center for Advanced Quantum Studies and Department of Physics Beijing Normal UniversityBeijing 100875China Institute for Nanoelectric Devices and Quantum Computing Fudan UniversityShanghai 200433China Interdisciplinary Center for Theoretical Physics and Information Sciences Fudan UniversityShanghai 200433China

In biological neural systems,noise is ubiquitous but does not affect the correct decisions made in the complex cognitive ***-making in biological neural system is typically achieved by accumulating input information over a period of *** by recent developments in neurosciences,we design a decision-making module based on spintronic devices,utilizing superparamagnetic tunnel junctions as artificial *** feasibility of this decision-making module is verified through circuit *** a multi-layer perceptron as an example,the module significantly improves the accuracy of the perceptron in the handwritten digit recognition ***,the spintronic decision-making module offers advantages over the conventional pooling methods,such as adaptive decision time,high performance and the absence of analog-to-digital *** decision-making module is flexible to be integrated into artificial neural networks and provides a general yet effective solution to enhance performance against device noise.

关键词： neuromorphic computing spintronics magnetic tunnel junction neural networks

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一种基于特征组合分类的杂波背景下红外弱小目标检测算法

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舰船电子工程 2021年第5期41卷 154-158页

作者：缪建成中国人民解放军海军装备部装备项目管理中心北京100071

在复杂背景中有效提取出真实红外弱小目标是红外搜索与跟踪系统中的一个技术难点,针对该问题提出了一种基于特征组合分类的杂波背景下红外弱小目标检测算法。算法分析了红外目标成像模型和典型干扰杂波的灰度特性,选取了一组可以有效区... 详细信息

在复杂背景中有效提取出真实红外弱小目标是红外搜索与跟踪系统中的一个技术难点,针对该问题提出了一种基于特征组合分类的杂波背景下红外弱小目标检测算法。算法分析了红外目标成像模型和典型干扰杂波的灰度特性,选取了一组可以有效区分红外弱小目标和干扰杂波的特征组合获得先验知识,然后利用支持向量机(SVM)对不同特征组合进行学习和评估,实现真实目标和干扰杂波的有效分类。试验结果表明,该算法能显著提高红外弱小目标的检测概率,在虚警率0.7个/帧条件下,检测概率可以达到0.78,显著高于经典tophat算法0.55的检测概率。

关键词：红外弱小目标干扰杂波特征组合 SVM分类器

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Emerging structures and dynamic mechanisms ofγ-secretase for Alzheimer’s disease

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Neural Regeneration Research 2025年第1期20卷 174-180页

作者： Yinglong miao Michael S.Wolfe Computational Medicine Program and Department of Pharmacology University of North Carolina–Chapel HillChapel HillNCUSA Department of Medicinal Chemistry University of KansasLawrenceKSUSA

γ-Secretase,called“the proteasome of the membrane,”is a membrane-embedded protease complex that cleaves 150+peptide substrates with central roles in biology and medicine,including amyloid precursor protein and the Notch family of cell-surface *** inγ-secretase and amyloid precursor protein lead to early-onset familial Alzheimer’s disease.γ-Secretase has thus served as a critical drug target for treating familial Alzheimer’s disease and the more common late-onset Alzheimer’s disease as ***,critical gaps remain in understanding the mechanisms of processive proteolysis of substrates,the effects of familial Alzheimer’s disease mutations,and allosteric modulation of substrate cleavage byγ-*** this review,we focus on recent studies of structural dynamic mechanisms ofγ-*** mechanisms,including the“Fit-Stay-Trim,”“Sliding-Unwinding,”and“Tilting-Unwinding,”have been proposed for substrate proteolysis of amyloid precursor protein byγ-secretase based on all-atom molecular dynamics *** an incorrect registry of the Notch1 substrate was identified in the cryo-electron microscopy structure of Notch1-boundγ-secretase,molecular dynamics simulations on a resolved model of Notch1-boundγ-secretase that was reconstructed using the amyloid precursor protein-boundγ-secretase as a template successfully capturedγ-secretase activation for proper cleavages of both wildtype and mutant Notch,being consistent with biochemical experimental *** approach could be potentially applied to decipher the processing mechanisms of various substrates byγ-*** addition,controversy over the effects of familial Alzheimer’s disease mutations,particularly the issue of whether they stabilize or destabilizeγ-secretase-substrate complexes,is ***,an outlook is provided for future studies ofγ-secretase,including pathways of substrate binding and product release,effects of modulators on familial Alzheimer’s disease mutations

关键词： Alzheimer’s disease amyloid precursor protein cryo-EM structures drug design intramembrane proteolysis molecular dynamics Notch

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磨矿分级作业提效降耗技术改造与应用实践

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有色金属（选矿部分） 2022年第3期 103-107页

作者：陈如凤缪建成胡继华南京银茂铅锌矿业有限公司南京210033

磨矿分级效率和能耗的影响因素较多,磨矿分级效果如何直接影响到选别指标。南京栖霞山铅锌矿针对磨矿分级存在设备老、能耗高、效率低等问题,在磨机大型化应用,磨矿自动控制、橡胶衬板与磁性衬板合理匹配等方面不断探索实践,彻底改变了... 详细信息

磨矿分级效率和能耗的影响因素较多,磨矿分级效果如何直接影响到选别指标。南京栖霞山铅锌矿针对磨矿分级存在设备老、能耗高、效率低等问题,在磨机大型化应用,磨矿自动控制、橡胶衬板与磁性衬板合理匹配等方面不断探索实践,彻底改变了磨矿、分级效率,使溢流细度-74μm含量由73.28%提高到80.65%;球磨效率提高了0.16 t/(m^(3)·h),分级效率提高16.9个百分点,降低了磨矿作业综合能耗2.2 kWh/t,取得了显著成效。

关键词：磨矿效率分级效率磨矿能耗选别指标

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小直径柔性钢索预紧张力的测量与计算

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力学与实践 2006年第2期28卷 29-32页

作者：缪建成陈关龙金隼上海交通大学机械与动力工程学院上海200030

汽车手制动装置中的钢索在装配时必须预紧到一定张力,装配时的张力采用“三点法”原理测量, 普遍认为由于钢索的弯曲应力,使测量值与实际值不符．通过分析钢索张力测量时的实际受力情况,提出非弯曲效应计算模型,与实验数据比较吻合,从... 详细信息

汽车手制动装置中的钢索在装配时必须预紧到一定张力,装配时的张力采用“三点法”原理测量, 普遍认为由于钢索的弯曲应力,使测量值与实际值不符．通过分析钢索张力测量时的实际受力情况,提出非弯曲效应计算模型,与实验数据比较吻合,从理论上解决了钢丝绳张力快速测量的技术问题,并在实际工艺中得到了稳定的结果．

关键词：钢丝绳张力弹性模量应力应变

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Correlation between the rock mass properties and maximum horizontal stress:A case study of overcoring stress measurements

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 39-48页

作者： Peng Li Meifeng Cai Shengjun miao Yuan Li Yu Wang Key Laboratory of Ministry of Education for Efficient Mining and Safety of Metal Mines University of Science and Technology BeijingBeijing 100083China State Key Laboratory of Coal Resources and Safe Mining China University of Mining and TechnologyXuzhou 221116China

Understanding the mechanical properties of the lithologies is crucial to accurately determine the horizontal stress *** investigate the correlation between the rock mass properties and maximum horizontal stress,the three-dimensional(3D)stress tensors at 89 measuring points determined using an improved overcoring technique in nine mines in China were adopted,a newly defined characteristic parameter C_(ERP)was proposed as an indicator for evaluating the structural properties of rock masses,and a fuzzy relation matrix was established using the information distribution *** results indicate that both the vertical stress and horizontal stress exhibit a good linear growth relationship with *** is no remarkable correlation between the elastic modulus,Poisson's ratio and depth,and the distribution of data points is scattered and ***,there is no obvious relationship between the rock quality designation(RQD)and *** maximum horizontal stress σ_(H) is a function of rock properties,showing a certain linear relationship with the C_(ERP)at the same *** addition,the overall change trend of σ_(H) determined by the established fuzzy identification method is to increase with the increase of C_(ERP).The fuzzy identification method also demonstrates a relatively detailed local relationship betweenσ_H and C_(ERP),and the predicted curve rises in a fluctuating way,which is in accord well with the measured stress data.

关键词： overcoring stress measurements elastic modulus Poisson's ratio rock quality designation maximum horizontal stress fuzzy identification

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