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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

Modification of alternative splicing in bovine somatic cell nuclear transfer embryos using engineered CRISPR-Cas13d

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Science China(Life Sciences) 2022年第11期65卷 2257-2268页

作者： Rui Cheng Xiaoman Zheng Yingmei Wang Xing Ma Xin Liu Wenjun Xu Mengyun Wang Yuanpeng Gao Xupeng Xing Chuan Zhou Hongzheng Sun zekun guo Fusheng Quan Jun Liu Song Hua Yongsheng Wang Yong Zhang Xu Liu College of Veterinary Medicine Northwest A&F UniversityKey Laboratory of Animal Biotechnology of the Ministry of AgricultureYangling 712100China

Animal cloning can be achieved by somatic cell nuclear transfer(SCNT),but the resulting live birth rate is relatively *** previously improved the efficiency of bovine SCNT by exogenous melatonin treatment or by overexpression of lysine-specific demethylase 4D(KDM4D)and 4E(KDM4E).In this study,we revealed abundant alternative splicing(AS)transitions during fertilization and embryonic genome activation,and demonstrated abnormal AS in bovine SCNT embryos compared with in vitro fertilized *** used the CRISPR-Cas13d RNA-targeting system to target cis-elements of ABI2 and ZNF106 pre-m RNA to modify AS,thus reducing the ratio of abnormal-isoform SCNT embryos by nearly 50%and achieving a high survival rate(11%–19%).These results indicate that this system may provide an efficient method for bovine cloning,while also paving the way for further improvements in the efficiency of SCNT.

关键词： animal cloning alternative splicing CRISPR-Cas13d bovine

Effect of near isothermal forging on the microstructure of Ti_3Al/TC11 welding interface

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Rare Metals 2009年第5期28卷 471-477页

作者： LIU Yingying YAOzekun guo Hongzhen College of Materials Science and Engineering Northwestern Polytechnical University Xi＇an 710072 China

The as-forged Ti3Al-based alloy and TC11 titanium alloy were welded by electron beams in vacuum, and then they were processed using near isothermal forging and gradient heat treatment. The experimental results show that the near isothermal forging processing parameters have little effect on the phase constitution of the weld. The weld consists of Ti2AlNb, MoNb, Nb3Al, and TiAl3 phases as well as the two main phases of α and α2. However, the near isothermal forging processing parameters have significant effect on the shape, size, and volume fraction of α and α2 phases of the welding interface. The sizes of the α and α2 phases increase as the strain rate decreases. Because the distortion energy of the lattice and the volume fraction of the grains occurring in dynamic recrystallization increase with an increase in deformation, the sizes of the α and α2 phases of the welding interface decrease.

关键词： Ti3Al-based alloy TCll titanium alloy electron beam welding isothermal forging interface microstructure

西加拿大沉积盆地Simonette区块上泥盆统Duvernay页岩地质特征与流体分布规律

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中国石油勘探 2022年第2期27卷 93-107页

作者：孔祥文汪萍夏朝辉张晓玲曲良超郭泽坤中国石油勘探开发研究院 100083

Duvernay页岩是西加拿大沉积盆地最重要的一套页岩油气富集与生产层系。该页岩是一套最大海侵期形成的富含沥青质暗色页岩,与国内页岩气藏相比,Duvernay页岩气藏的突出特点是富含凝析油,且凝析油含量平面差异大,流体分布复杂。通过对西... 详细信息

Duvernay页岩是西加拿大沉积盆地最重要的一套页岩油气富集与生产层系。该页岩是一套最大海侵期形成的富含沥青质暗色页岩,与国内页岩气藏相比,Duvernay页岩气藏的突出特点是富含凝析油,且凝析油含量平面差异大,流体分布复杂。通过对西加拿大沉积盆地中国石油Simonette区块上泥盆统Duvernay页岩构造和沉积演化、地层、地球化学、储层特征和流体分布规律的分析和解剖,提出了富含液烃页岩气勘探开发策略。研究结果表明:(1)Simonette区块Duvernay页岩上页岩段储层厚度大、层内不发育碳酸盐岩隔夹层、TOC高、储层物性好,是主力勘探开发目的层;(2)Simonette区块Duvernay页岩镜质组反射率(R_(o))为1.1%~1.6%,位于富含液烃条带,根据气油比可划分为挥发性油、特高含凝析油和高含凝析油3个区带,随着凝析油含量的增加,甲烷含量逐渐降低,原油密度逐渐增大,原油采收率逐渐减小;(3)勘探开发策略上,平面上应优先评价和开发易动用、采出程度高的特高含凝析油区带和高含凝析油区带,再开发挥发性油区带,纵向上以上页岩段高TOC层为主要目标。

关键词：西加拿大沉积盆地 Duvernay页岩地质特征流体分布

考虑工作点时变特性的并网变流器全工作区间稳定性分析

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中国电机工程学报 2024年第7期44卷 2801-2814,I0023页

作者：谢伟杰肖凡涂春鸣郑宇婷肖泽坤郭祺葛平娟国家电能变换与控制工程技术研究中心(湖南大学) 湖南省长沙市410082 中国石油大学(华东)新能源学院山东省青岛市266580

现有工程运行数据显示,并网变流器(grid-connected converter,GCC)的动态特性与工作点密切相关。受新能源出力波动、负载投切等外部因素的影响,变流器工作点呈现随机时变特性。因此,分析整个工作区间中所有工作点的系统稳定性具有重要... 详细信息

现有工程运行数据显示,并网变流器(grid-connected converter,GCC)的动态特性与工作点密切相关。受新能源出力波动、负载投切等外部因素的影响,变流器工作点呈现随机时变特性。因此,分析整个工作区间中所有工作点的系统稳定性具有重要意义。传统阻抗/导纳分析方法可以有效分析GCC运行于特定工作点时的稳定性,但考虑系统所有可能工作点时则需重复分析,工作量大且难度较高。为解决这一难题,提出一种考虑工作点变量的多元建模方法。将工作点变量引入导纳模型,通过控制环路重构,建立GCC的多变量单输入单输出(single input single output,SISO)模型。所提模型直接包含工作点变量,因此可以有效分析变流器全工作区间动态特性。此外,综合考虑变流器最大传输限制和动态特性,提出一种基于安全运行域的稳定性分析方法,以实现多维工作区间中系统稳定性的直观表征。仿真和实验验证了所提多变量SISO模型和基于安全运行域的分析方法的正确性。所提模型和方法在分析电力电子装置运行极限、指导变流器设计和辅助功率器件发挥极限性能等工程场景中具有广泛应用潜力。

关键词：并网变流器工作点多变量单输入单输出模型安全运行域时变系统全工作区间稳定性

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一种自主移动运输机器人的设计与验证

现代制造工程 2023年第10期 50-56,43页

作者：黄小龙李和洋许世强蔺晟杰张莹郭泽堃北京信息科技大学机电工程学院北京100192

在机器人搬运场景中,经常会出现货物实际姿态与预期不一致的情况,这时往往需要人工协作进行调整,工作效率和节拍因此受到影响。为解决以上问题,设计了一种自主移动运输机器人,可全向移动且具有新型摩擦轮-夹爪复合式取物结构及货物姿态... 详细信息

在机器人搬运场景中,经常会出现货物实际姿态与预期不一致的情况,这时往往需要人工协作进行调整,工作效率和节拍因此受到影响。为解决以上问题,设计了一种自主移动运输机器人,可全向移动且具有新型摩擦轮-夹爪复合式取物结构及货物姿态调整结构,其控制系统采用同步定位与建图(Simultaneous Localization And Mapping,SLAM)等技术。通过pitch轴和yaw轴货物姿态调整实验确定了关键工作参数的最优值。最后进行了自主导航实验,结果表明该机器人在室内环境可实现自主导航。

关键词：自主移动运输机器人摩擦轮-夹爪复合式取物结构姿态调整同步定位与建图自主导航

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细水雾抑制巷道火灾蔓延影响因素研究

煤炭科技 2024年第3期45卷 93-98页

作者：杭建郑泽坤郭小凤淮北矿业集团公司石台煤矿安徽淮北235053 西安科技大学安全科学与工程学院陕西西安710054

为探索细水雾抑制矿井胶带蔓延火灾的影响因素,利用火灾动力学模拟器(FDS)构建矿井巷道火灾蔓延几何模型,使用控制变量法,通过设置不同火源功率、雾通量、喷头安装距离与风速模拟细水雾抑制巷道火灾,观察不同工况的火场温度与热释放速... 详细信息

为探索细水雾抑制矿井胶带蔓延火灾的影响因素,利用火灾动力学模拟器(FDS)构建矿井巷道火灾蔓延几何模型,使用控制变量法,通过设置不同火源功率、雾通量、喷头安装距离与风速模拟细水雾抑制巷道火灾,观察不同工况的火场温度与热释放速率变化特征,揭示不同因素对火灾发展的影响。结果表明,细水雾对矿井火灾蔓延有良好的抑制作用,通过优化设计各种影响参数,可以更好地发挥细水雾冷却降温的作用;合理增加风速、雾通量和喷雾有效范围,可以有效提高灭火效率,降低温度和热释放效率;火源初始功率的变化也对细水雾灭火有较大影响,在其他条件相同的情况下,初始功率由2 MW增加到4 MW时,温度下降率由72.7%下降到32.7%。

关键词：细水雾火灾蔓延影响参数数值模拟温度特征

Study on Mechanical Properties and Action Mechanism of Leather Industrial Sludge Aggregate Baking-Free Bricks

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Journal of Renewable Materials 2023年第1期11卷 453-471页

作者： Lei guo zekun Wang Lixia guo Pingping Chen School of Water Conservancy North China University of Water Resources and Electric PowerZhengzhou450046China Henan Water Valley Research Institute Zhengzhou450046China Henan Key Laboratory of Water Environment Simulation and Treatment Zhengzhou450002China

Taking an industrial sludge and its preparation of sludge wrap shell aggregates(WSAs)instead of sand to prepare baking-free brick as the research object,the development law of mechanical properties and the influence mechanism of macro and micro characteristic parameters of the bricks under different sludge and WSAs replacement rates were studied through the macroscopic mechanical properties test,with the help of nuclear magnetic resonance(NMR),transmission electron microscopy-energy spectrum and other testing technology and pores and cracks analysis system(PCAS)*** results showed that the compressive strength of each sample decreased with the increase of sludge *** the sludge content was less than 30%,it was mainly affected by the water-binder *** the sludge content was more than 30%,it was mainly affected by the sludge *** the age of 7 days,with the increase in replacement rate of WSAs,the compressive strength of the S10 and S30 groups was higher than that of the control *** compressive strength of the S50 experimental group was 30.38 MPa,and the loss of compressive strength was slight compared with the control *** water absorption rate of the 28 days S100 experimental group increased by 10.71%compared with the control *** the content of WSAs was less than 50%,the holes above 0.1μm in the brick can be reduced and transformed into smaller holes,with a decreasing trend of the plane porosity of the *** microscopic results of the baking-free brick showed that the three-phase system of WSAs-interface transition area-mortar was poorly bonded and delaminated compared with the gravel aggregate-interface transition area-mortar system,and damage was more likely to occur in the WSAs and interface transition *** above results show that it is feasible to use sludge and WSAs instead of sand for the preparation of baking-free *** technology not only solves the problem of sludge disposal,but also protects the ov

关键词： Sludge wrap shell aggregates baking-free brick interface

局部放疗联合球后注射对Graves眼病患者血清IL-6、IL-8、IL-10水平的影响

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大医生 2019年第24期4卷 73-75页

作者：郭栋郭泽琨潍坊市市立医院山东潍坊261021

目的探讨局部放疗联合球后注射对甲状腺相关眼病(Graves)眼病患者血清IL-6、IL-8、IL-10水平的影响。方法选取2018年1月至2019年1月潍坊市市立医院收治的100例Graves眼病患者,根据数字表法随机将其分为研究组和对照组,各50例。对照组给... 详细信息

目的探讨局部放疗联合球后注射对甲状腺相关眼病(Graves)眼病患者血清IL-6、IL-8、IL-10水平的影响。方法选取2018年1月至2019年1月潍坊市市立医院收治的100例Graves眼病患者,根据数字表法随机将其分为研究组和对照组,各50例。对照组给予糖皮质激素球后注射治疗,研究组给予局部放疗和球后注射联合治疗,均治疗10周。比较治疗10周后2组临床疗效,比较治疗前及治疗10周后2组眼球突出度、睑裂宽度及血清IL-6、IL-8、IL-10水平变化,以及治疗过程中2组不良反应发生情况。结果研究组临床疗效总有效率96.0%显著高于对照组70.0%(P0.05)。结论局部放疗联合球后注射可显著抑制Graves眼病患者炎症反应,改善眼球突出及睑裂症状,疗效显著,且安全性良好。

关键词：甲状腺相关眼病局部放疗球后注射白细胞介素-6 白细胞介素-8 白细胞介素-10