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随机需求下农产品供应链利润分析

农机化研究 2012年第2期34卷 66-68页

作者：李庆印谭章禄于少伟中国矿业大学管理学院北京100083 山东英才学院济南250000

为了更加有效地分析农产品供应链在随机需求条件下的利润问题,针对现代农产品市场需求波动剧烈的情况,分析了单产品多原材料型的农产品供应链中利润持续增长的问题,构建一个关于需求和供给的投资组合;应用随机过程理论,得出了利润持续... 详细信息

为了更加有效地分析农产品供应链在随机需求条件下的利润问题,针对现代农产品市场需求波动剧烈的情况,分析了单产品多原材料型的农产品供应链中利润持续增长的问题,构建一个关于需求和供给的投资组合;应用随机过程理论,得出了利润持续增长条件下农产品供应链资源调节定理,并在此基础上给出了发展农产品供应链的一些建议和措施。

关键词：农产品供应链盈利能力

马岭油田北三区延10油层注水开发中储层伤害研究

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石油与天然气地质 2006年第2期27卷 263-268页

作者：朱玉双李庆印王小孟西北大学大陆动力学国家重点实验室地质学系陕西西安710069 中国石油长庆油田分公司第一采油厂陕西延安716000

马岭油田北三区延10油层粘土矿物主要成份依次为伊利石、伊／蒙混层、高岭石、绿泥石,对储层的潜在危害依次为伊利石、伊／蒙混层和高岭石所造成的水敏和速敏。本文利用马岭油田北三区延10油层真实砂岩模型进行的伤害研究表明,1)马岭油... 详细信息

马岭油田北三区延10油层粘土矿物主要成份依次为伊利石、伊／蒙混层、高岭石、绿泥石,对储层的潜在危害依次为伊利石、伊／蒙混层和高岭石所造成的水敏和速敏。本文利用马岭油田北三区延10油层真实砂岩模型进行的伤害研究表明,1)马岭油田北三区延10油层存在弱速敏,临界速度的大小与渗透率呈正相关,一般渗透率越小,临界速度也越小。由于实际注入水的矿化度较实验用地层水的矿化度要低,故注水开发中的速敏伤害较实验结果要强。2)马岭油田北三区延10油层存在弱一中等程度的水敏,K+的存在和注入水盐度的提高会减轻水敏伤害的程度,注入水的盐度以5-10 g／L为宜。3)水敏伤害条件下的驱油效率较无水敏伤害条件下的驱油效率低11．35％,宏观波及系数也明显降低,从而降低了油层采收率。建议加强对马岭油田北三区延10油层注水开发中的储层保护研究,在注水开发中采取更有效的储层保护措施,以提高油层采收率。

关键词：粘土矿物储层伤害速敏水敏驱油效率采收率马岭油田北三区延10油层

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

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

Theoretical Design of Defects as a Driving Force for Ion Transport in li_(3)OBr Solid Electrolyte

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Energy & Environmental Materials 2024年第3期7卷 143-153页

作者： Xingyun Luo Yanlu li Xian Zhao State Key Lab of Crystal Materials and Institute of Crystal Materials Shandong UniversityJinan 250100China Center for Optics Research and Engineering Shandong UniversityQingdao 266237China

Due to ever-increasing concerns about safety issues in using li ionic batteries,solid electrolytes have extensively *** li-rich antiperovskite li_(3)OBr has been considered as a promising solid electrolyte candidate,but it still suffers challenges to achieve a high ionic conductivity owing to the high intrinsic symmetry of the crystal ***,we presented a design strategy that introduces various point defects and grain boundaries to break the high lattice symmetry of li_(3)OBr crystal,and their effect and microscopic mechanism of promoting the migration of li-ion were explored *** has been found that li_(i)are the dominant defects responsible for the fast li-ion diffusion in bulk li_(3)OBr and its surface,but they are easily trapped by the grain boundaries,leading to the annihilating of the Frenkel defect pair V'_(li)+li_(i),and thus limits the V'_(li)diffusion at the grain *** V_(Br)defect near the grain boundaries can effectively drive V'_(li)across the grain boundary,thereby converting the carrier of li^(+)migration from li,in the bulk and surface to V'_(li)at the grain boundary,and thus improving the ionic conductivity in the whole li_(3)OBr *** work provides a comprehensive insight into the li^(+)transport and conduction mechanism in the li_(3)OBr *** opens a new way of improving the conductivity for all-solid-state li electrolyte material through the defect design.

关键词： defects density functional theory ionic migration solid electrolyte

Highly polar CoP/Co_(2)P heterojunction composite as efficient cathode electrocatalyst for li-air battery

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Chinese Chemical Letters 2024年第9期35卷 486-490页

作者： Miaomiao li Mengwei Yuan Xingzi Zheng Kunyu Han Genban Sun Fujun li Huifeng li Beijing Key Laboratory of Energy Conversion and Storage Materials College of ChemistryBeijing Normal UniversityBeijing 100875China Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) College of ChemistryNankai UniversityTianjin 300071China Center for Advanced Materials Research Beijing Normal UniversityZhuhai 519087China

In order to advance the commercialization of rechargeable li-air batteries,it is of importance to explore cathode catalyst with efficient catalytic *** metal oxides have poor electrical conductivity,while cobalt phosphide has excellent electrical conductivity and large specific surface ***,its application in organic li-air batteries has been much less studied,and the electrocatalytic activity desires to be further ***,CoP/Co_(2)P heterojunction composite with higher polarity was *** discharge product of high-polarity CoP/Co_(2)P had a new porous box-like morphology,which was easy to be decomposed and exposed more active *** highly polar CoP/Co_(2)P heterostructure composite had homogeneous pores,the synergistic effect existed between CoP and Co_(2)P,and the discharge product was porous box mixed with li_(2)O_(2)and liOH,which made CoP/Co_(2)P achieve high specific capacity of14632 m Ah/g and cycle stably 161 times when used as air electrode cathode *** work furnished a thought for the construction of cathode catalysts with efficient catalytic activity for li-air batteries.

关键词： li-air battery Cathode catalyst CoP/Co_(2)P Heterojunction structure High polarity

重症冠心病患者心脏康复分级护理方案的制订与应用

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中华护理杂志 2022年第4期57卷 395-400页

作者：吴岳李庆印赵冬云杨洋朱丽丽中国医学科学院阜外医院心脏康复中心北京市100037 中国医学科学院阜外医院护理部北京市100037 中国医学科学院阜外医院冠心病重症监护室北京市100037

目的制订并应用重症冠心病患者心脏康复分级护理方案,评价其应用效果。方法2019年7月通过文献回顾和临床实践分析重症冠心病患者心脏康复护理特点及难点,成立专项管理小组,制订重症冠心病患者心脏康复分级护理方案,将该方案于2019年8月... 详细信息

目的制订并应用重症冠心病患者心脏康复分级护理方案,评价其应用效果。方法2019年7月通过文献回顾和临床实践分析重症冠心病患者心脏康复护理特点及难点,成立专项管理小组,制订重症冠心病患者心脏康复分级护理方案,将该方案于2019年8月—2021年1月进行临床应用并收集相关资料。结果心脏康复分级护理方案共计应用于817例患者,转科前进阶至下地活动的患者有519例(63.5%),发生不良事件13例(1.6%)。结论该方案可有效对重症冠心病患者进行危险分层,指导护士开展心脏康复护理干预。

关键词：冠心病心脏康复护理评估急性心肌梗死

Ⅰ期强化康复护理应用于心脏瓣膜手术患者的效果

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中国护理管理 2019年第1期19卷 60-65页

作者：赵琳霍春颖李庆印郝云霞石丽中国医学科学院阜外医院心外科北京市100037 中国医学科学院阜外医院护理部北京市100037

目的 :分析Ⅰ期强化康复护理对心脏瓣膜手术患者运动能力、呼吸功能、健康相关生活质量的改善效果。方法 :采用便利抽样法,将我院96例择期行心脏瓣膜手术的患者分为实验组与对照组。对照组采用常规护理模式,实验组在常规护理的基础上,... 详细信息

目的 :分析Ⅰ期强化康复护理对心脏瓣膜手术患者运动能力、呼吸功能、健康相关生活质量的改善效果。方法 :采用便利抽样法,将我院96例择期行心脏瓣膜手术的患者分为实验组与对照组。对照组采用常规护理模式,实验组在常规护理的基础上,自患者入院时开展心脏Ⅰ期强化康复干预。采用6分钟步行实验(6WMT)、最大吸气压(MIP)、健康调查简表(SF-36)进行数据收集,比较两组患者在运动能力、呼吸功能、健康相关生活质量方面的差异。结果 :出院时两组患者在步行距离,Borg主观疲劳程度量表,MIP,SF-36的躯体疼痛、生理功能、一般健康状况、活力、精神健康5个维度差异均具有统计学意义(P0.05)。结论 :Ⅰ期强化康复护理对心脏瓣膜择期手术患者术后早期生活质量有促进作用,尤其是在步行能力和呼吸功能方面。

关键词：心脏瓣膜心脏外科手术康复护理 6分钟步行实验

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)