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Depression mechanism of sulfite ions on sphalerite and Pb^(2+)activated sphalerite in the flotation separation of galena from sphalerite

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 335-345页

作者： feng zhang Chenyang zhang Linlin Wu Wei Sun Hongliang zhang Jianhua Chen Yong Pei Songjiang Li Engineering Research Center of Ministry of Education for Carbon Emission Reduction in Metal Resource Exploitation and Utilization Hunan International Joint Research Center for Efficient and Clean Utilization of Critical Metal Mineral ResourcesSchool of Minerals Processing and BioengineeringCentral South UniversityChangsha 410083China State Key Laboratory of Mineral Processing Beijing General Research Institute of Mining&MetallurgyBeijing 100160China Hunan Provincial Key Laboratory of Micro&Nano Materials Interfaces Science College of Chemistry and Chemical EngineeringCentral South UniversityChangsha 410083China School of Resources Environment and MaterialsGuangxi UniversityNanning 530004China Department of Chemistry Xiangtan UniversityXiangtan 411105China China Railway Resource Group Co.Ltd Beijing 102300China

The depression mechanism of sulfite ions on sphalerite and Pb^(2+)activated sphalerite in the flotation separation of galena from sphalerite still lacked in-depth ***,the depression mechanism of sulfite ions on sphalerite and Pb^(2+)activated sphalerite in the flotation separation of galena from sphalerite was further systematically investigated with experiments and density functional theory(DFT)*** X-ray photoelectric spectroscopy(XPS)results,DFT calculation results,and frontier molecular orbital analysis indicated that sulfite ions were difficult to be adsorbed on sphalerite surface,suggesting that sulfite ions achieved depression effects on sphalerite through other non-adsorption ***,the oxygen content in the surface of sphalerite treated with sulfite ions in creased,which enhanced the hydrophilicity of the sphalerite and further increased the difference in hydrophilicity between sphalerite and ***,sulfite ions were chelated with lead ions to form PbSO_(3)in *** hydrophilic PbSO_(3)was more easily adsorbed on sphalerite than *** interaction between sulfite ions and lead ions could effectively inhibit the activation of *** addition the UV spectrum showed that after adding sulfite ions,the peak of perxanthate in the sphalerite treated xanthate solution was significantly stronger than that in the galena with xanthate solution,indicating that xanthate interacted more readily with sulfite ions and oxygen mo lecules within the sphalerite system,leading to the formation of ***,sulfite ions hardly depressed the flotation of ga lena and could promote the flotation of galena to some *** study deepened the understanding of the depression mechanism o sulfite ions on sphalerite and Pb^(2+)activated sphalerite.

关键词： sphalerite galena sulfite ion density functional theory depression mechanism

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Copper homeostasis and neurodegenerative diseases

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Neural Regeneration Research 2025年第11期20卷 3124-3143页

作者： Yuanyuan Wang Daidi Li Kaifei Xu Guoqing Wang feng zhang International Research Laboratory of Ethnomedicine of Ministry of Education Key Laboratory of Basic Pharmacology of Ministry of EducationLaboratory Animal Center and Key Laboratory of Basic Pharmacology of Guizhou ProvinceZunyi Medical UniversityZunyiGuizhou ProvinceChina

Copper,one of the most prolific transition metals in the body,is required for normal brain physiological activity and allows various functions to work normally through its range of *** homeostasis is meticulously maintained through a complex network of copper-dependent proteins,including copper transporters(CTR1 and CTR2),the two copper ion transporters the Cu-transporting ATPase 1(ATP7A)and Cu-transporting beta(ATP7B),and the three copper chaperones ATOX1,CCS,and *** in copper homeostasis can lead to either the deficiency or accumulation of copper in brain *** evidence suggests that abnormal copper metabolism or copper binding to various proteins,including ceruloplasmin and metallothionein,is involved in the pathogenesis of neurodegenerative ***,the exact mechanisms underlying these processes are not *** is a potent oxidant that increases reactive oxygen species production and promotes oxidative *** reactive oxygen species levels may further compromise mitochondrial integrity and cause mitochondrial *** oxygen species serve as key signaling molecules in copper-induced neuroinflammation,with elevated levels activating several critical inflammatory ***,copper can bind aberrantly to several neuronal proteins,including alphasynuclein,tau,superoxide dismutase 1,and huntingtin,thereby inducing neurotoxicity and ultimately cell *** study focuses on the latest literature evaluating the role of copper in neurodegenerative diseases,with a particular focus on copper-containing metalloenzymes and copper-binding proteins in the regulation of copper homeostasis and their involvement in neurodegenerative disease *** synthesizing the current findings on the functions of copper in oxidative stress,neuroinflammation,mitochondrial dysfunction,and protein misfolding,we aim to elucidate the mechanisms by which copper contributes to a wide range of heredit

关键词： Alzheimer's disease amyotrophic lateral sclerosis disease copper homeostasis copper toxicity Huntington's disease Menkes'disease multiple sclerosis neurodegenerative disease Parkinson's disease Wilson's disease

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High-energy-density lithium manganese iron phosphate for lithium-ion batteries: Progresses, challenges, and prospects

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Journal of Energy Chemistry 2025年第1期100卷 1-17页

作者： Bokun zhang Xiaoyun Wang Shuai Wang yan Li Libo Chen Handong Jiao Zhijing Yu Jiguo Tu State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing Research Institute for Intelligent Wearable Systems The Hong Kong Polytechnic University Institute of Advanced Structure Technology Beijing Institute of Technology

The soaring demand for smart portable electronics and electric vehicles is propelling the advancements in high-energy–density lithium-ion *** manganese iron phosphate (LiMnxFe1-xPO4) has garnered significant attention as a promising positive electrode material for lithium-ion batteries due to its advantages of low cost,high safety,long cycle life,high voltage,good high-temperature performance,and high energy *** LiMnxFe1-xPO4has made significant breakthroughs in the past few decades,there are still facing great challenges in poor electronic conductivity and Li-ion diffusion,manganese dissolution affecting battery cycling performance,as well as low tap *** review systematically summarizes the reaction mechanisms,various synthesis methods,and electrochemical properties of LiMnxFe1-xPO4to analyze reaction processes accurately and guide material ***,the main challenges currently faced are concluded,and the corresponding various modification strategies are discussed to enhance the reaction kinetics and electrochemical performance of LiMnxFe1-xPO4,including multi-scale particle regulation,heteroatom doping,surface coating,as well as microscopic morphology ***,in view of the current research challenges faced by intrinsic reaction processes,kinetics,and energy storage applications,the promising research directions are *** importantly,it is expected to provide key insights into the development of high-performance and stable LiMnxFe1-xPO4materials,to achieve practical energy storage requirements.

关键词： Lithium manganese iron phosphate High energy density Lithium-ion batteries Reaction mechanism Tap density

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The Clinical Treatment of Traditional Chinese and Western Medicine In 64 Cases of Anovular Infertility

The Clinical Treatment of Traditional Chinese and Western Me...

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全国中青年中西医结合学术（英语）交流会议

作者： yan feng, zhang Ji-Hua Li Rui-fang Song Lan-Ping Maternal and Child Health Hospital, BaoDing City, HeBei Province

Objective: To observe the therapeutic effect of traditional Chinese and western medicine treatment in 64 cases of anovulatory infertilityMethods: A total of 114 cases attended the Gynecological outpatient’s department. Each one underwent the examination of tubal patency test diagnostic uterine curettage, antibody determination of immuno -infertility. The reasons of fallopian tube and immuno-infertility were excluded. The test of semen was normal, the anovulatory infertility was diagnosed, (corpus luteum insufficiency was included) these cases were divided into two groups at random: Traditional Chinese-Western Medicine group (treated group) and Western Medicine group (control group). The herbs (omitted below) of regulating menstruation and aiding pregnancy were administered in treated group, meanwhile Clomiphene was used. While in control group: only Clomiphene was taken, the usage of it was as same as treated group’s, then observing the development of follicles, formation of dominant follicles and ovulation under ultrasound, the examination of BBT and cervical mucous crystals also be ***: In 64 cases of treated group: 54 cases were cured. Of these 40 cases got pregnancy 12 cases were anovulatory, total effective rate was 81.25%;In 50 cases of control group: 30 cases were cured. Of these 24 cases got pregnancy;20 cases were anovulatory, total effective rate was 60 %. In two groups, comparation of effective rate was significantly different (pyang, transformation between Yin and yang of kidney were the key problem of this disease. The herbs of regulating menstruation, aiding pregnancy, promoting ovulation were used to invigorate kidney and enrich yang energy, to nourish kidney and Yin energy. This makes Yin and yang of kidney in unity of opp

关键词： Traditional Chinese and Western Medicine Anovulation infertility

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逆变式等离子弧切割电源的建模及仿真研究

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系统仿真学报 2009年第18期21卷 5840-5844,5848页

作者：贾德利尤波张雪岩张逢靖哈尔滨理工大学自动化学院哈尔滨150080

采用基于Simulink的元件仿真技术,针对逆变式等离子弧切割电源本身具有非线性、时变性及混杂性特点,建立了基于PI调节的数字化逆变式切割电源系统仿真模型。并在此基础上,完成了对电感影响测试、死区效应、负载突变及切割外特性测试等... 详细信息

采用基于Simulink的元件仿真技术,针对逆变式等离子弧切割电源本身具有非线性、时变性及混杂性特点,建立了基于PI调节的数字化逆变式切割电源系统仿真模型。并在此基础上,完成了对电感影响测试、死区效应、负载突变及切割外特性测试等动态过程的仿真。仿真结果表明,该模型充分体现各逆变电源参数对切割工艺的影响,并进一步验证了各参数变化规律与理论分析相符,该仿真模型是分析广义非线性混杂电力系统的有效工具。

关键词：等离子弧切割电源 Simulink仿真混杂系统

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提升管加床层反应器不同操作模式下的压力脉动特性

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过程工程学报 2016年第5期16卷 721-729页

作者：丁睿王德武刘燕张少峰张伟赵立军河北工业大学化工学院天津300130 河北工业大学海水资源高效利用化工技术教育部工程研究中心天津300130

在提升管加床层反应器冷模实验装置上,分别采取零床层和有床层的操作模式,测量并分析了提升管内的压力脉动行为.结果表明,有床层操作模式下的提升管内压力脉动标准偏差明显高于零床层操作模式;压力脉动主频零床层操作模式下主要集中于1.... 详细信息

在提升管加床层反应器冷模实验装置上,分别采取零床层和有床层的操作模式,测量并分析了提升管内的压力脉动行为.结果表明,有床层操作模式下的提升管内压力脉动标准偏差明显高于零床层操作模式;压力脉动主频零床层操作模式下主要集中于1.56-3.13和0-0.391 Hz,主要源于提升管内颗粒的脉动,有床层操作模式下为12.5-25.0和0-0.391 Hz,12.5-25.0 Hz频段主要源于提升管出口上方设置的气固分布器加流化床层对提升管内气固流动的约束及其影响下的气体脉动行为,0-0.391Hz频段主要源于提升管段进料的不连续性及其与进料口下方提升气体的相互作用.

关键词：提升管加床层反应器操作模式压力脉动小波分析

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丹参酮ⅡA促进Eca109细胞凋亡转录组学研究

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时珍国医国药 2018年第2期29卷 314-316页

作者：何航张妍高剑峰张小莉朱艳琴河南中医药大学基础医学院河南郑州450046

目的利用RNA测序(RNA sequencing,RNA-seq)进行丹参酮ⅡA促食管鳞状细胞癌(esophageal squamous cell carcinoma,ESCC)Eca109细胞凋亡的转录组学研究,探讨可能的分子机制。方法丹参酮ⅡA(8μg/ml)处理Eca109细胞48 h,空白组作为对照,进行高通量转录组测序分析,筛选差异基因,分析转录组表达谱,利用GO(gene ontology)功能注释和KEGG(kyoto encyclopedia of genes and genomes)通路富集方法探讨丹参酮ⅡA促进Eca109细胞凋亡分子机制。结果转录组测序分别获得包含28,667,820、27,830,388条过滤后测序读数,构建测序文库比对分析显示,差异基因共有627条,其中7条基因表达上调,620条基因表达下调,483条基因存在不同类型可变剪接。GO分类及KEGG通路分析表明:差异表达基因涉及多种食管癌肿瘤信号通路NF-κB、Wnt、Hedgehog,且与ESCC发生发展的进程相关。结论丹参酮ⅡA促进Eca109细胞凋亡分子机制可能与下调肿瘤信号通道相关,也进一步为ESCC治疗提供新依据。

关键词：丹参酮ⅡA 食管鳞状细胞癌转录组

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基于Boosting的代价敏感软件缺陷预测方法

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计算机科学 2017年第8期44卷 176-180,206页

作者：杨杰燕雪峰张德平南京航空航天大学计算机科学与技术学院南京211106

Boosting重抽样是常用的扩充小样本数据集的方法,首先针对抽样过程中存在的维数灾难现象,提出随机属性子集选择方法以进行降维处理;进而针对软件缺陷预测对于漏报与误报的惩罚因子不同的特点,在属性选择过程中添加代价敏感算法。以多个... 详细信息

Boosting重抽样是常用的扩充小样本数据集的方法,首先针对抽样过程中存在的维数灾难现象,提出随机属性子集选择方法以进行降维处理;进而针对软件缺陷预测对于漏报与误报的惩罚因子不同的特点,在属性选择过程中添加代价敏感算法。以多个基本k-NN预测器为弱学习器,以代价最小为属性删除原则,得到当前抽样集的k值与属性子集的预测器集合,采用代价敏感的权重更新机制对抽样过程中的不同数据实例赋予相应权值,由所有预测器集合构成自适应的集成k-NN强学习器并建立软件缺陷预测模型。基于NASA数据集的实验结果表明,在小样本情况下,基于Boosting的代价敏感软件缺陷预测方法预测的漏报率有较大程度降低,误报率有一定程度增加,整体性能优于原来的Boosting集成预测方法。

关键词：软件缺陷预测 Boosting 代价敏感随机属性选择集成k-NN

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高可靠性压差传感器的设计与测试

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仪表技术与传感器 2018年第5期 12-15页

作者：陈玉玲史岩峰张艳华张巧寿北京强度环境研究所北京100076

压差传感器用于伺服系统作动器两腔压力差的测量,文中针对高可靠性、高精度、耐高温、小型化压差传感器的应用需求,提出了高可靠性压差传感器的设计方案并进行测试,主要包括芯体设计、结构设计和电路设计。该产品采用SOI硅晶圆材料制作... 详细信息

压差传感器用于伺服系统作动器两腔压力差的测量,文中针对高可靠性、高精度、耐高温、小型化压差传感器的应用需求,提出了高可靠性压差传感器的设计方案并进行测试,主要包括芯体设计、结构设计和电路设计。该产品采用SOI硅晶圆材料制作压力敏感芯片,可在150℃下正常工作。传感器通过性能测试以及环境试验,试验结果表明该传感器能够满足实际使用要求,在150℃下温度漂移和灵敏度漂移均小于±0.1%FS/℃。

关键词：高可靠性压差传感器 SOI 环境试验

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Boosting hydrocarbon conversion via Cu-doping induced oxygen vacancies on CeO2 in CO2 electroreduction

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Journal of Energy Chemistry 2025年第1期100卷 66-76页

作者： Lei Xue Tong Shi Chenhui Han Heng zhang Fenrong Liu Haorun Li yan Wang Xiaojun Gu Shanghong Zeng Inner Mongolia Key Laboratory of Chemistry and Physics of Rare Earth Materials School of Chemistry and Chemical Engineering Inner Mongolia University State Key Laboratory of Coal Conversion Institute of Coal Chemistry Chinese Academy of Sciences Institute of Catalysis Department of Chemistry Zhejiang University National Key Laboratory of Baiyunobo Rare Earth Resource Research and Comprehensive Utilization Baotou Research Institute of Rare Earths

Conversion of CO2back to hydrocarbons is the most direct way of closing the“carbon cycle”,and its significance is further enlarged if this process is driven by renewable energies such as ***,precisely controlling the product selectivity towards hydrocarbons against the competitive hydrogen evolution remains challenging,especially for Cu-based ***,we report a novel defect engineering strategy,by which Cu-doping-induced oxygen vacancies on CeO2nanorods were effectively created,with adjustable vacancy/Cu *** resulting optimum catalyst shows up to 79% catalytic current density to hydrocarbons （excluding CO）,with 49% faradaic efficiency to *** and density functional theory unveil that the ratio between oxygen vacancy and Cu affects significantly the formation of*CHO and activation of H2O,which leads to the following deep hydrogenation to *** findings may spur new insights for designing and developing more controllable chemical process relevant to CO2utilization.

关键词： Oxygen vacancy Hydrocarbon production Reaction mechanism

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