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Early-stage latent thermal failure of single-crystal Ni-rich layered cathode

Journal of Energy Chemistry 2024年第9期96卷 578-587页

作者： xiao Han Ruoyu Xu yan Li yang Ding Manchen Zhang Bo wang xiaoxing Ke Manling Sui Pengfei yan Beijing Key Laboratory of Microstructure and Property of Solids Faculty of Materials and ManufacturingBeijing University of TechnologyBeijing 100124China Watt Laboratory Central Research InstituteHuawei Technologies Co.LTDShenzhen 518129GuangdongChina

High nickel content worsens the thermal stability of layered cathodes for lithium-ion batteries,raising safety concerns for their *** understanding the thermal failure process can offer valuable guidance for material optimization on thermal stability and new opportunities in monitoring battery thermal runaway(TR).Herein,this work comprehensively investigates the thermal failure process of a single-crystal nickel-rich layered cathode and finds that the latent thermal failure starts at∼120℃far below the TR temperature(225℃).During this stage of heat accumulation,sequential structure transition is revealed by atomic resolution electron microscopy,which follows the layered→cation mixing layered→LiMn_(2)O_(4)-type spinel→disordered spinel→rock *** progression occurs as a result of the continuous migration and densification of transition metal *** transition generates gaseous oxygen,initially confined within the isolated closed pores,thereby not showing any thermal failure phenomena at the *** temperature leads to pore growth and coalescence,and eventually to the formation of open pores,causing oxygen gas release and weight loss,which are the typical TR *** highlight that latent thermal instability occurs before the macro-level TR,suggesting that suppressing phase transitions caused by early thermal instability is a crucial direction for material *** findings can also be used for early warning of battery thermal runaway.

关键词： Thermal runaway Nickel-rich layered cathode Transmission electron microscopy Lithium-ion battery Phase transition

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轮班对地铁职工健康相关生命质量的影响

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环境卫生学杂志 2024年第7期14卷 539-548页

作者：毛明武曾铁梅王晓燕陶懿闫雪平佘晓芳夏璐刘俊玲王怀记刘莉叶昉何振宇武汉地铁集团有限公司武汉430070 华中科技大学同济医学院公共卫生学院流行病与卫生统计学系武汉市疾病预防控制中心华中科技大学同济医学院公共卫生学院劳动卫生与环境卫生学系

目的探究轮班对地铁职工健康相关生命质量的影响,为提高该职业人群的健康素养提供科学依据。方法2019年对武汉市地铁集团职工进行研究,使用调查问卷收集人口学特征和职业史等信息。用生活质量评价量表(the Mos 36-item Short Form Healt... 详细信息

目的探究轮班对地铁职工健康相关生命质量的影响,为提高该职业人群的健康素养提供科学依据。方法2019年对武汉市地铁集团职工进行研究,使用调查问卷收集人口学特征和职业史等信息。用生活质量评价量表(the Mos 36-item Short Form Health Survey,SF-36)测定其健康相关生命质量;按照性别分层,采用单因素和多因素Logistic回归模型分析轮班对该职业人群量表各维度得分的影响。结果9960名职工中有68.6%从事轮班工作。不同性别、工种、被动吸烟状况、锻炼习惯、睡眠状况、个人疾病史亚组人群的SF-36量表得分有显著差异(P<0.05)。与不轮班者相比,不同轮班制职工的一般健康状况、健康变化和社会功能等维度得分为差的风险均较高。并且随着轮班年限的增加,轮班者在身体机能、生理职能、一般健康状况、健康变化、精力、社会功能和精神健康维度得分为差的风险呈现为先升高再趋于平缓甚至下降的趋势。在男职工中,轮班制影响其SF-36量表各维度得分,但在女职工中未见此影响。结论轮班工作可能是影响地铁职工健康相关生命质量的重要危险因素之一,尤以男职工为甚。

关键词：地铁职工轮班生活质量评价量表(SF-36) Logistic回归模型

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血清Omentin-1在老年初诊2型糖尿病患者中的变化与意义

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罕少疾病杂志 2024年第6期31卷 117-119页

作者：王朏朏张洁乐忠宏王小燕崔婷婷耿直焦作市人民医院老年医学科河南焦作454002

目的探讨血清Omentin-1在老年初诊2型糖尿病患者中的变化,并阐述其临床意义。方法选取2020年1月至2022年12月本院收治的66例老年初诊2型糖尿病患者,58例同期体检老年志愿者为对照组,比较两组研究对象外周血中空腹血糖、糖化血红蛋白(H... 详细信息

目的探讨血清Omentin-1在老年初诊2型糖尿病患者中的变化,并阐述其临床意义。方法选取2020年1月至2022年12月本院收治的66例老年初诊2型糖尿病患者,58例同期体检老年志愿者为对照组,比较两组研究对象外周血中空腹血糖、糖化血红蛋白(Hb A1C)、空腹胰岛素、Omentin-1等指标变化,统计胰岛素抵抗指数(HOMA-IR),多元Logistic回归分析预测老年初诊2型糖尿病的危险因素,并分析指标间的相关性。结果老年初诊2型糖尿病患者空腹血糖、Hb A1C、HOMA-IR、空腹胰岛素等指标水平均明显高于对照组(P0.05)。结论血清Omentin-1水平可作为老年初诊2型糖尿病患者的预后指标,对老年2型糖尿病诊治具有一定的指导意义。

关键词：网膜素-1 老年初诊2型糖尿病胰岛素抵抗

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Atmospheric transmission algorithm for pulsed X-rays from high-altitude nuclear detonations based on scattering correction

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Nuclear Science and Techniques 2024年第3期35卷 40-52页

作者： Ding-Han Zhu Xiong Zhang xiao-Qiang Li Peng Li yan-Bin wang Shuang Zhang State Key Laboratory of NBC Protection for Civilian Beijing 102205China

In high-altitude nuclear detonations,the proportion of pulsed X-ray energy can exceed 70%,making it a specific monitoring signal for such *** pulsed X-rays can be captured using a satellite-borne X-ray detector following atmospheric *** quantitatively analyze the effects of different satellite detection altitudes,burst heights,and transmission angles on the physical processes of X-ray transport and energy fluence,we developed an atmospheric transmission algorithm for pulsed X-rays from high-altitude nuclear detonations based on scattering *** proposed method is an improvement over the traditional analytical method that only computes direct-transmission *** traditional analytical method exhibits a maximum relative error of 67.79% compared with the Monte Carlo *** improved method reduces this error to within 10% under the same conditions,even reaching 1% in certain ***,its computation time is 48,000 times faster than that of the Monte Carlo *** results have important theoretical significance and engineering application value for designing satellite-borne nuclear detonation pulsed X-ray detectors,inverting nuclear detonation source terms,and assessing ionospheric effects.

关键词： High-altitude nuclear detonation Atmospheric transmission Pulsed X-rays Scattering correction Analytical method Monte Carlo method

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基于生化指标与代谢组学特征关联探索热毒宁注射液与青霉素注射液序贯用药的风险“时间窗”

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药学学报 2024年第7期59卷 2098-2107页

作者：张明亮陈毓龙王晓艳陈小菲张辉吴娅丽杨柳青张书琦牛璐冯科冉李伟霞唐进法河南中医药大学第一附属医院药学部河南省中药临床应用、评价与转化工程研究中心河南省中药临床药学中医药重点实验室河南省中药安全评价与风险防控工程研究中心河南郑州450003 河南中医药大学河南郑州450046 河南中医药大学呼吸疾病中药防治省部共建协同创新中心河南郑州450046

采用检测血清生化指标与血浆代谢组学特征关联探索热毒宁注射液(Reduning,RDN)与青霉素注射液(penicillin G,PG)序贯用药风险“时间窗”,以期降低二者联用引发不良反应发生风险。所有动物实验操作和福利均遵循河南中医药大学第一附属实... 详细信息

采用检测血清生化指标与血浆代谢组学特征关联探索热毒宁注射液(Reduning,RDN)与青霉素注射液(penicillin G,PG)序贯用药风险“时间窗”,以期降低二者联用引发不良反应发生风险。所有动物实验操作和福利均遵循河南中医药大学第一附属实验动物伦理与动物福利委员会要求(批号:YFYDW2020002)。利用ELISA检测大鼠血清中生化指标的含量变化检测相关过敏指标,判定出RDN联用PG能引起由补体途径激活后的类过敏反应(pseudo-allergic reactions,PARs)。进一步对二者设置不同时间给药间隔(1.5、2、3.5、4、6和8 h PG+RDN)进行考察,发现在3.5 h以内序贯给药,均能引起明显的PARs;而给药间隔超过4 h后PARs则明显减轻。同时采用LC-MS进行血浆代谢组学分析,平行比较大鼠的血清生化指标水平与血浆代谢轮廓特征,筛选出22个差异代谢物在3.5 h前后呈现出与生化指标相似或相反的变化趋势。并富集到花生四烯酸代谢、甾体激素生物合成代谢、亚油酸代谢、甘油磷脂代谢、色氨酸代谢等10条类过敏相关通路。综上所述,RDN和PG序贯使用所导致的药物不良反应确实存在风险“时间窗”现象,在“时间窗”之后的间隔用药能有效降低不良反应发生风险。

关键词：中西药联用药物不良反应时间窗热毒宁注射液青霉素注射液类过敏反应代谢组学花生四烯酸代谢

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An Improved Modulation Strategy for Single-phase Three-level Neutral-point-clamped Converter in Critical Conduction Mode

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Journal of Modern Power Systems and Clean Energy 2024年第3期12卷 981-990页

作者： Ning Li Yujie Cao xiaokang Liu yan Zhang Ruotong wang Lin Jiang xiao-Ping Zhang School of Electrical Engineering Xi’an University of TechnologyXi’anChina the Department of Electronics Information and BioengineeringPolitecnico di MilanoMilanItaly Xi’an Jiaotong University Xi’anChina the Department of Electrical Engineering and Electronics University of LiverpoolLiverpoolU.K. the Department of Electronic Electrical and Systems EngineeringUniversity of BirminghamBirminghamU.K.

Two-level totem-pole power factor correction(PFC)converters in critical conduction mode(CRM)suffer from the wide regulation range of switching ***,in highfrequency applications,the number of switching times increases,resulting in significant switching *** solve these issues,this paper proposes an improved modulation strategy for the single-phase three-level neutral-point-clamped(NPC)converter in CRM with *** optimizing the discharging strategy and switching state sequence,the switching frequency and its variation range have been efficiently *** detailed performance analysis is also presented regarding the switching frequency,the average switching times,and the effect of voltage gain.A 2 k W prototype is built to verify the effectiveness of the proposed modulation strategy and analysis *** with the totem-pole PFC converter,the switching frequency regulation range of the three-level PFC converter is reduced by 36.48%and the average switching times is reduced by 45.10%.The experimental result also shows a 1.2%higher efficiency for the three-level PFC converter in the full load range.

关键词： Critical conduction mode(CRM) on-board charger switching frequency range switching times power factor correction(PFC) three-level converter

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Ti_(3)C_(2)T_(x)/SnO_(2)P–N heterostructure construction boosts room-temperature detecting formaldehyde

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Rare Metals 2024年第1期43卷 267-279页

作者： Yue Zhang Ming-Yue wang xiao-Guang San yan-Bai Shen Guo-Sheng wang Lei Zhang Dan Meng College of Chemical Engineering Shenyang University of Chemical TechnologyShenyang 110142China Institute for Superconducting and Electronic Materials(ISEM) Australian Institute for Innovative Materials(AIIM)University ofWollongongWollongongNSW2500Australia College of Resources and Civil Engineering Northeastern UniversityShenyang 110819China

Formaldehyde is a common atmospheric pollutant produced in industrial production and daily ***,the traditional semiconductor formaldehyde gas sensor cannot work at room temperature,which limits its practical ***,developing high-performance gas sensors for rapidly and accurately detecting formaldehyde at room temperature is an important *** this study,Ti_(3)C_(2)Tx/SnO_(2)heterostructures were constructed,which could selectively detect formaldehyde at room temperature with a response value of 29.16%(10×10^(-6)).In addition,the sensor shows a remarkable theoretical detection limit of 5.09×10^(-9)and good longterm *** functional theory(DFT)simulations reveal that SnO_(2)nano spheres provide the majority of adsorption sites that strongly interact with ***,Ti_(3)C_(2)T_(x)acting as a conductive layer facilitates the transfer of charge carriers so that they show a sensing response to formaldehyde at room ***,the formation of p-n heterostructures between SnO_(2)and Ti_(3)C_(2)T_(x)boosts the Schottky barrier at the interface,which is the critical factor in enhancing the sensing properties by turning the Schottky barrier upon introducing formaldehyde *** perspective is expected to provide instructive guidance for utilizing MXene/metal oxide nanocomposites to improve the gas sensing performance at room temperature.

关键词： Ti_(3)C_(2)T_(x)/SnO_(2)nanocomposites p-n heterostructures Formaldehyde sensing Room temperature DFT calculations

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Multi-endpoint assays reveal more severe toxicity induced by chloraminated effluent organic matter than chloraminated natural organic matter

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Journal of Environmental Sciences 2024年第1期135卷 310-317页

作者： Hai-yan wang De-Xiu Wu Ye Du xiao-Tong Lv Qian-Yuan Wu State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental SciencesBeijing 100012China Environmental Protection Key Laboratory of Microorganism Application and Risk Control Guangdong Provincial Engineering Research Center for Urban Water Recycling and Environmental SafetyTsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055China College of Architecture and Environment Sichuan UniversityChengdu 610000China

Disinfection by chloramination produces toxic byproducts and the difference in toxicity of reclaimed and drinking water treated by chloramination remains *** study investigated cytotoxic effects at the same concentrations of dissolved organic matter and showed that chloraminated effluent organic matter(EfOM)induced 1.7 times higher cytotoxicity than chloraminated natural organic matter(NOM)applied to simulate drinking *** EfOM induced more reactive nitrogen species than chloraminated NOM,and chloraminated EfOM and NOM induced similar and higher levels of reactive oxygen species than the negative control,***,intracellular macromolecule damage indicated by DNA/RNA damage marker 8–hydroxy-(deoxy)guanosine and the intracellular protein carbonyl concentration induced by chloraminated EfOM was higher and slightly more than that induced by chloraminated NOM,*** data were consistent with the effects on cell physiological *** cycle arrest mainly occurred in G2 phase by chloraminated EfOM and *** apoptotic cells,which could return to normal,increased upon exposure to high concentrations of chloraminated EfOM and ***,necrotic cells were significantly increased from 0.5%to 2.5%when the concentration increased from 20-to 60-fold chloraminated EfOM,but were not obviously changed by chloraminated *** results indicated that the comprehensive intracellular changes induced by toxic substances in chloraminated EfOM were more irreversible and induced more cell death than chloraminated NOM.

关键词： Cytotoxicity Intracellular active nitrogen/oxygen Intracellular oxidative damage Cell necrosis Reclaimed water

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Quantum squeezing induced nonreciprocal phonon laser

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Science China(Physics,Mechanics & Astronomy) 2024年第6期67卷 20-30页

作者： Tian-Xiang Lu yan wang Keyu Xia Xing xiao Le-Man Kuang Hui Jing College of Physics and Electronic Information Gannan Normal UniversityGanzhou 341000China Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education Department of Physics and Synergetic Innovation Center for Quantum Effects and ApplicationsHunan Normal UniversityChangsha 410081China Academy for Quantum Science and Technology Zhengzhou University of Light IndustryZhengzhou 450002China College of Engineering and Applied Sciences National Laboratory of Solid State Microstructuresand Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210023China

Phonon lasers or coherent amplifications of mechanical oscillations are powerful tools for fundamental studies on coherent acoustics and hold potential for diverse applications,ranging from ultrasensitive force sensing to phononic information ***,we propose the use of an optomechanical resonator coupled to a nonlinear optical resonator for directional phonon *** find that by pumping the nonlinear optical resonator,directional optical squeezing can occur along the pump *** a result,we can achieve the directional mechanical gain using directional optical squeezing,thereby leading to nonreciprocal phonon lasing with a well-tunable directional power *** work proposes a feasible way to build nonreciprocal phonon lasers with various nonlinear optical media,which are important for a wide range of applications,such as directional acoustic amplifiers,invisible sound sensing or imaging,and one-way phononic networks.

关键词： nonreciprocal phonon laser directional quantum squeezing optomechanics

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Three-dimensional Modeling of Ore-forming Elements and Mineralization Prognosis for the Yechangping Mo Deposit,Henan Province,China

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Acta Geologica Sinica(English Edition) 2024年第3期98卷 736-752页

作者： DING Gaoming JI Genyuan yan Guolong XU Yongzhong wang Kunming xiao Chun wang Quanle GUO Dongbao China National Administration of Coal Geology Beijing 100038China MNR Key Laboratory of Metallogeny and Mineral Assessment Institute of Mineral ResourcesCAGSBeijing 100037China China Gold Group Geological Co. Ltd.Beijing 100011China China Gold Group ZhongYuan Mining Co. Ltd.SanmenxiaHenan 472000China Lanzhou Mineral Exploration Institute of Gansu Nonferrous Metal Geological Exploration Bureau Lanzhou 730046China

Three-dimensional geochemical modeling of ore-forming elements is crucial for predicting deep *** approach provides key information for the quantitative prediction of deep mineral localization,three-dimensional fine interpolation,analysis of spatial distribution patterns,and extraction of quantitative mineral-seeking *** Yechangping molybdenum(Mo)deposit is a significant and extensive porphyry-skarn deposit in the East Qinling-Dabie Mo polymetallic metallogenic belt at the southern margin of the North China *** borehole data on oreforming elements underpin deep geochemical *** methodology includes the following steps:(1)Threedimensional geological modeling of the deposit was established.(2)Correlation,cluster,and factor analyses post delineation of mineralization stages and determination of mineral generation sequence to identify(Cu,Pb,Zn,Ag)and(Mo,W,mfe)assemblages.(3)A three-dimensional geochemical block model was constructed for Mo,W,mfe,Cu,Zn,Pb,and Ag using the ordinary kriging method,and the variational function was developed.(4)Spatial distribution and enrichment characteristics analysis of ore-forming elements are performed to extract geological information,employing the variogram and w(Cu+Pb+Zn+Ag)/w(Mo+W)as predictive indicators.(5)Identifying the western,northwestern,and southwestern areas of the mine with limited mineralization potential,contrasted by the northeastern and southeastern areas favorable for mineral exploration.

关键词： 3D geochemical model ore-forming elements geostatistics deep mineralization prediction Yechangping Mo deposit

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