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多级配球降低半自磨中顽石积累及改善磨矿效果试验

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稀有金属 2022年第5期46卷 673-680页

作者：武煜凯肖庆飞高志勇昆明理工大学国土资源工程学院云南昆明650093 矿冶过程自动控制技术国家(北京市)重点实验室北京100070 中南大学资源加工与生物工程学院湖南长沙410083

针对新疆某铜镍矿半自磨机顽石积累严重、磨矿效果差的问题,采用离散元法(DEM)模拟仿真实验模拟分析不同级配钢球对顽石的碰撞能量分布及利用率,并在实验室进行半自磨机磨矿循环试验验证。研究结果表明:在此试验中,多级配球在能量利用... 详细信息

针对新疆某铜镍矿半自磨机顽石积累严重、磨矿效果差的问题,采用离散元法(DEM)模拟仿真实验模拟分析不同级配钢球对顽石的碰撞能量分布及利用率,并在实验室进行半自磨机磨矿循环试验验证。研究结果表明:在此试验中,多级配球在能量利用率方面优于单一球径及偏大级配,多级配球可在提供与偏大级配相同冲击力的情况下增加碰撞次数,从而使能量分布更加合理,且改善磨矿效果的同时降低了衬板磨损;推荐级配钢球较现场级配及偏大级配切向碰撞能量利用率分别提高了8.88%和1.38%,法向碰撞能量利用率分别提高了3.66%和0.92%,推荐级配对衬板的碰撞能量较偏大级配降低了1061.84 J;验证试验中推荐级配顽石产率较现场级配及偏大级配分别降低了4.19%和3.36%,-74μm产率分别提高了4.80%和2.24%。从理论分析及试验验证多级配球可有效降低半自磨顽石积累并改善磨矿效果。

关键词：多级配球半自磨顽石碰撞能量分布离散元磨矿效果

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Extensively Drug-Resistant(XDR)Salmonella Typhi Outbreak by Waterborne Infection——Beijing Municipality,China,January-February 2022

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China CDC weekly 2022年第12期4卷 254-258页

作者： Yu Wang Dan Lu Yingying Jin Huanxin Wang Bing Lyu Xin Zhang Ying Huang gaolin Shu Baiwei Liu Changying Lin Hao Zhao Mingqiang Zhao Lingyu Shen zhiyong gao Daitao Zhang Quanyi Wang Mei Qu Lei Jia Beijing Center for Disease Prevention and Control Beijing Key Laboratory of Diagnostic and Traceability Technologies for Food PoisoningBeijingChina Changping District Center for Disease Control and Prevention BeijingChina

Summary What is already known about this topic?Typhoid fever remains a major public health problem in developing *** typhoid fever affects an estimated 27 million people worldwide each *** of indiscriminate antibiotic usage has driven the emergence and spread of multidrug-resistant(MDR)and even extensively drug-resistant(XDR)Salmonella Typhi(***)strains.

关键词： break Waterborne XDR

Comparison of four methods of DNA extraction from rice

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Chinese Rice Research Newsletter 2002年第Z1期 10-11页

作者： SONG Ming, Guo Zhongxin, gao zhiyong, and ZHANG Yunsun, Dept of Biotechnology, Yunnan Univ, Kunming 650091, China

Polyphenols, teroens, and resins make it difficult to obtain high quality genomic DNA from rice. Four extraction methods were compared in our study, and CTAB precipitation was the most practical *** used were old leaves from F5 transgenic rice in Hainan and fresh leaves from F5 transgenic rice in *** of the four methods were as follows:1. Basical method: powder 1 g old or new leaves → added 2 ml extraction solution (100 mmol/ L

关键词： DNA CTAB Comparison of four methods of DNA extraction from rice

Comparison of four methods of DNA extraction from rice

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Chinese Rice Research Newsletter 2002年第3期10卷 10-11页

作者： SONG Ming GUO Zhongxin gao zhiyong ZHANG Yunsun,Dept of Biotechnology,Yunnan Univ,Kunming 650091,China

Polyphenols,teroens,and resinsmake it difficult to obtain high qualitygenomic DNA from *** ex-traction methods were compared inour study,and CTAB precipitationwas the most practical *** used were old leavesfrom Ftransgenic rice in Hainan andfresh leaves from Ftransgenic rice *** of the four methodswere as follows:*** method:powder 1 gold or new leaves→added 2 ml ex-traction solution(100 mmol/L

关键词： DNA CTAB Comparison of four methods of DNA extraction from rice

Research on Plasma Surface Metallurgy of Low Alloy High Speed Steel Power Hack Saw Blade

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Research on Plasma Surface Metallurgy of Low Alloy High Spee...

The synthesis of 3D TiO2/ZnO hybrid array for Photoelectrochemical water splitting

The Fourth International Conference on Physical and Numerical Simulation of Materials Processing (ICPNS’2004)

作者： Yuan gao, zhiyong HE and Zhong XU Taiyuan University of Technology, Shanxi, China, 030024

Plasma surface metallurgy of low alloy high speed power hack saw blade is introduced in this paper. the blade is made of low alloy steel 20CrV, while the teeth possesses the composition of high speed steel by using surface metallurgy on teeth by plasma surface alloying process. Diffusion process avoids the formation of coarse primary carbides .The carbides in surface layer of the high speed steel are fine and uniformly-distributed. Therefore, the surface layer has the wear-resistance and the toughness. Besides, the blade also has the advantages of simple and low cost in manufacturing.

关键词： Plasma surface metallurgy Power hacksaw blade High speed steel Carbide Low alloy

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The synthesis of 3D TiO2/ZnO hybrid array for Photoelectroch...

Al Doped Co Hydroxyl Fluoride Nanosheet Arrays as Efficient Faradic Electrode for Hybrid Supercapacitor

河南省化学会2016年学术年会

作者： Fang Xu Jingjing Mei Huimin Chen zhiyong gao Dapeng Wu Kai Jiang Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals Key Laboratory of Green Chemical Media and Reactions Ministry of EducationSchool of Chemistry and Chemical Engineering Henan Normal University School of Environment Henan Normal University

The development of a novel nanoarray photoanode with a heterostructure provides a promising scheme to fabricate efficient energy conversion devices.[1-3] Herein, we successfully synthesize the vertically aligned hierarchical TiO/ZnO nanorod hybrid arrays via hydrothermal reaction. [4] Under Xenon lamp illumination(UV spectrum matched to AM1.5G, 100 mW/cm total power density), the TiO/ZnO array produces a photocurrent density of 1.14 mA/cm at 1.23 V vs RHE. The strategies for constructing such kind of heterojunctions are well applicable to other dual bandgap photoanodes.

关键词： TiO2 nanowire arrays heterostructure energy conversion

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Al Doped Co Hydroxyl Fluoride Nanosheet Arrays as Efficient ...

Cholera Caused by a New Clone of Serogroup O1 Vibrio cholerae-Beijing Municipality,China,June 2021

中国化学会第十届全国无机化学学术会议

作者： Jiuli Chang Liming Chen Dapeng Wu Fang Xu Kai Jiang zhiyong gao School of Chemistry and Chemical Engineering Henan Normal University

The regulations of phases,morphologies,surface wettability and oxidation values of surface metal sites are fundimental ways to optimize the surface associated capacitive and catalytic properties of metal compounds[1,2].Fand Alare unique ions with high electronegativity or ionic potential,which are capable of tuning the oxidation values,surface polarities and further the redox activities of transition metal ***,Al doped Co hydroxyl fluoride(Al-Co(OH)F) with vertically aligned nanosheets arrays configuration onto Ni foam substrate was prepared by hydrolysis of Co precursor mediated by Fand Alions (Figure 1).Due to the vertical electron and ions transfer channels along the nanosheets arrays,as well as the enhanced oxidation values of Co element induced by the robust electrons withdrawing abilities of Fand Alions,the resultant Al-Co(OH)F faradic electrode is capable of offering a maximum specific capacitance (C) of 1576 F g at 1.0 A g,and 624 F g is still maintained at the high current density of 20 A ***,84%of its initial Cs is maintained undergoes 5000 repeated charge-discharge cycles at 5 A *** used as faradic electrode of hybrid supercapacitor (HSC),high energy density (Ecell) of 42.7 Wh kg at power density (Pcell) of382.6 W kg was harvested,and E declines to 18.2 Wh kg with P increases to 3123.5 W kg,showing the potential of Al-Co(OH)F in faradic energy storage.

关键词： Co hydroxyl fluoride Al doping faradic capacitance nanosheets array hybrid supercapacitor

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China CDC weekly 2022年第2期4卷 31-32页

作者： Hanqiu Yan Bo Pang Xin Lu zhiyong gao Pan Lu Xin Zhang Mengyu Wang Lingyu Shen Wenxuan Zhao Jianhong Zhao Weili Liang Lei Jia Haijian Zhou Zhigang Cui Xiaoli Du Biao Kan Quanyi Wang Beijing Center for Disease Prevention and Control Beijing Research Center for Preventive MedicineBeijing Key Laboratory of Diagnostic and Traceability Technologies for Food PoisoningBeijingChina State Key Laboratory of Infectious Disease Prevention and Control National Institute for Communicable Disease Control and PreventionChinese Center for Disease Control and PreventionBeijingChina Beijing Chaoyang Center for Disease Prevention and Control BeijingChina

Several lineages have been identified in the population of serogroup O1 Vibrio cholerae(***)(1-3).The strains,which were responsible for the ongoing seventh cholera pandemic,were in Lineage *** all the *** strains in this lineage carried genes coding cholera toxin(ctxAB)(1-2).Lineage 3b consists of strains isolated from different continents and the vast majority of strains in this lineage lack the ctxAB genes.

关键词： cholerae Clone majority

逆冲活动对准南前陆盆地层序构成的影响及意义

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同济大学学报（自然科学版） 2011年第4期39卷 614-619页

作者：纪友亮潘春孚高志勇朱如凯中国石油大学地球科学学院北京102249 同济大学海洋与地球科学学院上海200092 中国石油天然气股份有限公司石油勘探开发研究院北京100083

新近纪准噶尔盆地南缘是在北天山强烈逆冲构造背景下发育的前陆盆地.其新近系沙湾组-塔西河组可划分为1个二级层序,2个三级层序,均由角度不整合、平行不整合或沉积环境转换面所分隔.整个二级层序的沉积构成反映了从前陆逆冲挠曲沉降到... 详细信息

新近纪准噶尔盆地南缘是在北天山强烈逆冲构造背景下发育的前陆盆地.其新近系沙湾组-塔西河组可划分为1个二级层序,2个三级层序,均由角度不整合、平行不整合或沉积环境转换面所分隔.整个二级层序的沉积构成反映了从前陆逆冲挠曲沉降到回弹隆升的演化过程,层序1沉积构成明显受逆冲构造活动控制,而回弹隆起影响了构造相对宁静期的层序2内部沉积构成.新近纪逆冲构造活动阶段的内部演化,制约了同期的冲积扇-扇三角洲沉积体系.受逆冲构造活动影响,层序1(沙湾组)扇三角洲砂体不断向盆地推进,侧向连片,垂向上相互叠置形成厚度可观的储集体,其下伏前期深湖相烃源岩,离生烃中心近,上覆层序2(塔西河组)发育的大量细粒沉积物作为良好的盖层,易形成大型油气田.

关键词：逆冲构造活动前陆盆地层序回弹隆升沉积构成

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