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Mechanical responses of anchoring structure under triaxial cyclic loading

Journal of Rock Mechanics and Geotechnical Engineering 2024年第2期16卷 545-560页

作者： Peng Wang Nong Zhang Qun Wei Xingliang Xu Guangzhen Cui aoran li Sen Yang Jiaguang Kan State Key Laboratory of Coal Resources and Safe Mining School of MinesChina University of Mining and TechnologyXuzhou221116China School of Civil Engineering Xuzhou University of TechnologyXuzhou221116China School of Mechanical Engineering Jiangsu University of TechnologyChangzhou213001China

Dynamic load on anchoring structures(AS)within deep roadways can result in cumulative damage and *** study develops an experimental device designed to test AS under triaxial *** device enables the investigation of the mechanical response,failure mode,instability assessment criteria,and anchorage effect of AS subjected to combined cyclic dynamic-static triaxial stress *** results show that the peak bearing strength is positively correlated with the anchoring matrix strength,anchorage length,and edgewise compressive *** bearing capacity decreases significantly when the anchorage direction is severely *** free face failure modes are typically transverse cracking,concave fracturing,V-shaped slipping and detachment,and spallation ***,when the anchoring matrix strength and the anchorage length decrease while the edgewise compressive strength,loading rate,and anchorage inclination angle increase,the failure intensity *** is determined by a negative tangent modulus of the displacement-strength curve or the continued deformation increase against the general downward *** cyclic loads,the driving force that breaks the rock mass along the normal vector and the rigidity of the AS are the two factors that determine roadway ***,a control measure for surrounding rock stability is proposed to reduce the internal driving force via a pressure relief method and improve the rigidity of the AS by full-length anchorage and grouting modification.

关键词： Triaxial stress Dynamic-static combination load Cyclic loading Anchoring structure(AS) Cumulative damage

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基于量子粒子群的定模动辊装备系统动力学优化

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机床与液压 2022年第7期50卷 1-6页

作者：李傲然李强北方工业大学机械与材料工程学院北京100144

为提高定模动辊装备系统的安全性及加工精度,优化其各传动链零部件的性能参数,基于5个道次的定模动辊辊弯成形装备的运动过程,构建等效简化模型;以x向运动的动态响应加速度的最大值的绝对最小值为优化目标对其进行优化,提出量子粒子群... 详细信息

为提高定模动辊装备系统的安全性及加工精度,优化其各传动链零部件的性能参数,基于5个道次的定模动辊辊弯成形装备的运动过程,构建等效简化模型;以x向运动的动态响应加速度的最大值的绝对最小值为优化目标对其进行优化,提出量子粒子群优化算法的改进策略;利用改进后的量子粒子群优化算法进行求解,得到5个道次的定模动辊装备系统性能参数的最优方案。

关键词：变截面辊弯成形定模动辊成形装备量子粒子群优化算法改进策略

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失水胁迫与复水对绣球切花采后品质的影响

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分子植物育种 2022年第14期20卷 4786-4792页

作者：张燕李亮杰李傲然杨丽信阳农林学院园艺学院信阳464006

绣球(Hydrangea macrophylla)切花花大色艳、寓意美好,越来越受市场欢迎,但绣球切花花序硕大,对短暂失水反应强烈,极易因此丧失观赏价值。本研究以绣球切花为材料,研究了失水胁迫及复水对绣球切花寿命、花径、弯颈程度、鲜质量、可溶性... 详细信息

绣球(Hydrangea macrophylla)切花花大色艳、寓意美好,越来越受市场欢迎,但绣球切花花序硕大,对短暂失水反应强烈,极易因此丧失观赏价值。本研究以绣球切花为材料,研究了失水胁迫及复水对绣球切花寿命、花径、弯颈程度、鲜质量、可溶性糖、呼吸强度、电导率及脯氨酸含量变化的影响。结果表明,失水主要引起绣球切花萎蔫,导致弯颈和花径变小,降低观赏价值。但不长于12 h的失水胁迫各时间点复水后瓶插寿命差异不显著。尽管稍长时间的失水对细胞膜有一定程度损害,但失水引起脯氨酸积累以抵御水分亏缺,短期失水可以经复水接近原始状态。绣球切花不长于12 h失水胁迫经复水后对其观赏品质及生理的影响不大,因此在采后流通中,如果条件限制只能干藏,建议时间不超过12 h,并应在此期间及时采用深水法复水以保证切花品质。

关键词：绣球(Hydrangea macrophylla) 切花失水胁迫品质

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“一带一路”倡议下中国文学在匈牙利的译介与传播

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国际汉学 2023年第3期 70-77,156页

作者：李傲然北京外国语大学欧洲语言文化学院北京第二外国语学院

本文对自21世纪以来,尤其是“一带一路”倡议提出以来中国文学在匈牙利的译介出版情况进行了调研,对中国文学在匈牙利译介出版的现状与前景进行考察,分析了中国文学在匈牙利的译介与传播呈现空前繁荣的成因,总结了这一时期中国文学在匈... 详细信息

本文对自21世纪以来,尤其是“一带一路”倡议提出以来中国文学在匈牙利的译介出版情况进行了调研,对中国文学在匈牙利译介出版的现状与前景进行考察,分析了中国文学在匈牙利的译介与传播呈现空前繁荣的成因,总结了这一时期中国文学在匈牙利译介与传播存在的不足,认为应提高中国文学的创作质量以适应不同文化的能力,不断探索译介与传播的有效举措,使中国文学的译介与传播在质和量上实现全方位的拓展。

关键词： “一带一路” 中国文学匈牙利译介传播

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基于系统工程方法的装甲装备可靠性指标分配

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兵工学报 2022年第S1期43卷 196-202页

作者：赵健张亮李岙然冯宇张宇刘锐李毅李鑫勇朱振雷内蒙古第一机械集团股份有限公司内蒙古包头014032 内蒙古北方重工业集团有限公司内蒙古包头014032

针对装甲装备基本可靠性指标的分配问题,采用系统工程中的系统评价方法解决。以某特征参数测试系统为例,建立了系统层次分析模型,确定单元产品在系统中的分配权重,计算过程通过验算,结果表明系统工程方法可对装甲装备基本可靠性指标进... 详细信息

针对装甲装备基本可靠性指标的分配问题,采用系统工程中的系统评价方法解决。以某特征参数测试系统为例,建立了系统层次分析模型,确定单元产品在系统中的分配权重,计算过程通过验算,结果表明系统工程方法可对装甲装备基本可靠性指标进行合理分配,可以为装甲装备可靠性设计提供依据,并可在解决其他类似工程问题上推广应用。

关键词：装甲装备系统工程可靠性指标分配层次分析法

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Leaching kinetics of fluorine during the aluminum removal from spent li-ion battery cathode materials

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Journal of Environmental Sciences 2024年第4期138卷 312-325页

作者： Shengjie li Jianxin Zhu Research Center for Eco-Environmental Sciences Chinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China

The high content of aluminum(Al)impurity in the recycled cathode powder seriously affects the extraction efficiency of Nickel,Cobalt,Manganese,and lithium resources and the actual commercial value of recycled materials,so Al removal is crucially important to conform to the industrial standard of spent li-ion battery cathode *** this work,we systematically investigated the leaching process and optimum conditions associated with Al removal from the cathode powder materials collected in a wet cathode-powder peeling and recycling production line of spent li-ion batteries(liBs).Moreover,we specifically studied the leaching of fluorine(F)synergistically happened along with the removal process of Al,which was not concerned about in other studies,but one of the key factors affecting pollution prevention in the recovery *** mechanism of the whole process including the leaching of Al and F from the cathode powder was indicated by using NMR,FTIR,and XPS,and a defluoridation process was preliminarily investigated in this *** leaching kinetics of Al could be successfully described by the shrinking core model,controlled by the diffusion process and the activation energy was 11.14 kJ/***,the leaching of F was attributed to the dissolution of liPF6and decomposition of PVDF,and the kinetics associated was described by Avrami *** interaction of Al and F is advantageous to realize the defluoridation to some *** is expected that our investigation will provide theoretical support for the large-scale recycling of spent liBs.

关键词： Al removal F leaching Cathode powder Heating alkali leaching Leaching kinetics

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Additives strategies to improving cycling stability of li metal batteries by modifying electrode electrolyte interphases

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Progress in Natural Science:Materials International 2024年第2期34卷 338-344页

作者： Yuan li Pengfei Huang Chunyu Cui Xiaoyuan Ma li Chen Zekun li linhai li Yuhong Tian School of Biological and Chemical Engineering Guangxi University of Science and Technology School of College of Chemistry and Chemical Engineering Hunan University Isky Future Energy Institute

li metal batteries（LMBs） have attracted much attention due to the ultra-high theoretical capacity of the li metal anode（LMA）.However,the uncontrollable dendrites growth and low coulombic efficiency hinder their practical ***,we explore 3,5-difluoropyridine（2F-BD） as a novel electrolyte additive to enable highperformance *** 2F-BD additive participates in and modifies the solvation structure of li ions by reducing the coordinated number of PF6-at the electrode surface,leading to the formation of a liF and li3N-rich solid electrolyte interphase（SEI）.The liF component increases the robustness of SEI and suppresses the formation of li dendrites,while the li3N component facilitates the transportation and reaction kinetics of li *** a result,the li‖li symmetric cell presents a stable cycling performance of up to 500 h at a current density of 1 mA *** coupling with liFePO4cathode,the obtained full cell achieves high specific capacities of 106.06 mA h g-1and 84.98 mA h g-1at 2.55 mA cm-2and 5.10 mA cm-2,respectively,and maintains a high capacity retention of84.0% after 1000 cycles at 0.13 mA cm-2,with an average cycling CE of 99.58%.

关键词： Electrolyte additive li dendrites li metal batteries liF and li3N-Rich electrode-electrolyte interphase liFePO4 cathode

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SEI/dead li-turning capacity loss for high-performance anode-free solid-state lithium batteries

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Journal of Energy Chemistry 2024年第9期96卷 145-152页

作者： Qianwen Yin Tianyu li Hongzhang Zhang Guiming Zhong Xiaofei Yang Xianfeng li Division of Energy Storage Dalian National Laboratory for Clean EnergyDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina University of Chinese Academy of Sciences Beijing 100049China Key Laboratory of Long-Duration and Large-Scale Energy Storage Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina Laboratory of Advanced Spectro-Electrochemistry and lithium-Ion Batteries Dalian National Laboratory for Clean EnergyDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina

Anode-free solid-state lithium metal batteries(AF-SSLBs)have the potential to deliver higher energy density and improved safety beyond lithium-metal ***,the unclear mechanism for the fast capacity decay in AF-SSLBs,either determined by dead li or solid electrolyte interface(SEI),limits the proposal of effective strategies to prolong cycling *** clarify the underlying mechanism,herein,the evolution of SEI and dead li is quantitatively analyzed by a solid-state nuclear magnetic resonance(ss-NMR)technology in a typical liPF6-based polymer *** results show that the initial capacity loss is attributed to the formation of SEI,while the dead li dominates the following capacity loss and the growth rate is 0.141 mA h cm^(−2)cycle−*** reduce the active li loss,the combination of inorganic-rich SEI and self-healing electrostatic shield effect is proposed to improve the reversibility of li deposition/dissolution behavior,which reduces the capacity loss rate for the initial SEI and following dead li generation by 2.3 and 20.1 folds,*** a result,the initial Coulombic efficiency(ICE)and stable CE increase by 15.1%and 15.3%in li-Cu cells,which guides the rational design of high-performance AF-SSLBs.

关键词： Solid-state lithium batteries Solid-state NMR Anode-free SEI Dead li

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基于集合经验模态分解和优化支持向量机的风速预测模型

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黑龙江电力 2023年第5期45卷 402-406页

作者：闫帆李傲燃云南大学昆明650504

针对风速序列在时序上的间歇性、波动性等特征,提出一种基于集合经验模态分解方法和粒子群优化算法优化支持向量机的组合型短期风速预测方法。采用分解算法进行扩展集成,采用组合-合作型预测模型实现各分量的准确预测,再将其进行重构得... 详细信息

针对风速序列在时序上的间歇性、波动性等特征,提出一种基于集合经验模态分解方法和粒子群优化算法优化支持向量机的组合型短期风速预测方法。采用分解算法进行扩展集成,采用组合-合作型预测模型实现各分量的准确预测,再将其进行重构得到最终预测结果。通过对中国北方某风电场的风速数据进行实例验证,证明了该模型能克服单一预测模型预测精度不高的问题,并拥有较优的泛化性能。

关键词：风力发电风速预测集合经验模态分解支持向量机粒子群算法

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Synergy effect of regulated li-plating and functional solid electrolyte interphase on graphite anodes

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Nano Research 2024年第9期17卷 8077-8085页

作者： Panpan Wang Baojia Xia Jianling li State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China Shanghai Institute of Microsystem and Information Technology Chinese Academy of SciencesShanghai 201800China

The growth of li dendrites poses potential safety hazard to lithium-ion batteries(liBs),and eliminating li dendrites thoroughly stills face tough difficulties ***,regulating li-plating is a critical optimization-direction to address the ***,a“graphite-li hybrid”anode with high reversibility is realized under the constant-capacity lithiation(CCL).Within CCL,the uniform distribution of li-plating on the graphite surface is successfully *** evolution in different states of solid electrolyte interphase(SEI)is investigated in detail to study the interaction between the potentials and impedance during the process of liintercalation and *** the potential below 0 V and the state of charge(SOC)of 110%relative to the theoretical capacity,the F-rich SEI with high stability is constructed to hinder the emergency of li dendrites and maintain the intact structure of graphite anode under long *** cell presents more than 100%Coulombic efficiency(CE)with the 900 cycles,demonstrating the reversible li-plating and the utilization of *** the CCL half-cell provides a good cycling performance and specific capacity of 900 cycles at 0.5 C,it is attributed to the synergy effect of stable inorganic-rich SEI and regulated active li-plating.

关键词： "graphite-li hybrid"anode li-plating reversibility solid electrolyte interphase(SEI)

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