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Rational construction and decoration of Li_(5)Cr_(7)Ti_(6)O_(25)@Cnanofibers as stable lithium storage materials

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Journal of Energy Chemistry 2022年第8期31卷 400-410,I0011页

作者： ting-ting Wei Panpan Peng Yu-Rui Ji Yan-Rong zhu ting-Feng Yi Ying Xie School of Materials Science and Engineering Northeastern UniversityShenyang 110819LiaoningChina Key Laboratory of Functional Inorganic Material Chemistry Ministry of EducationSchool of Chemistry and Materials ScienceHeilongjiang UniversityHarbin 150080HeilongjiangChina School of Resources and Materials Northeastern University at QinhuangdaoQinhuangdao 066004HebeiChina Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province Qinhuangdao 066004HebeiChina

Li_(5)Cr_(7)Ti_(6)O_(25) is regarded as a promising anode material for Li-ion batteries(LIBs)because of its low cost and high theoretical ***,the inherently poor conductivity significantly limits the enhancement of its rate capability and cycling stability,especially at high current *** this work,we construct one-dimensional Li_(5)Cr_(7)Ti_(6)O_(25)/C nanofibers by electrospinning method to enhance the kinetic,which realizes high cycling *** coating enhances the structure stability,insertion/extraction reversibility of Li-ions and electrochemical reaction activity,and facilitates the transfer of *** from the unique architecture and component,the Li_(5)Cr_(7)Ti_(6)O_(25)/C(6.6 wt%)nanofiber shows an excellent rate capability with a reversible de-lithiation capacity of 370.8,290.6,269.2,254.3 and 244.9 m Ah g^(-1) at 200,300,500,800 and 1000 m A g^(-1),*** at a higher current density of 1 A g^(-1),Li_(5)Cr_(7)Ti_(6)O_(25)/C(6.6 wt%)nanofiber shows high cycling stability with an initial de-lithiation capacity of 237.8 m Ah g^(-1) and a capacity retention rate of about 84%after 500 *** density functional theory calculation result confirms that the introduction of carbon on the surface of Li_(5)Cr_(7)Ti_(6)O_(25) changes the total density of states of Li_(5)Cr_(7)Ti_(6)O_(25),and thus improves electronic conductivity of the composite,resulting in a good electrochemical performance of Li_(5)Cr_(7)Ti_(6)O_(25)/C ***_(5)Cr_(7)Ti_(6)O_(25)/C nanofibers indicate a great potential as an anode material for the next generation of high-performance LIBs.

关键词： Lithium-ion battery Anode Li_(5)Cr_(7)Ti_(6)O_(25) Electrospinning Nanofibers

Effect of methane-hydrogen mixtures on flow and combustion of coherent jets

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Journal of Iron and Steel Research International 2017年第11期24卷 1143-1151页

作者： ting Cheng Rong zhu Kai Dong School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China Beijing Key Laboratory of Research Center of Special Melting and Preparation of High-end Metal Materials University of Science and Technology BeijingBeijing 100083China

Coherent jets are widely used in electric are furnace （EAF） steelmaking to increase the oxygen utilization and chemical reaction rates. However, the influence of fuel gas combustion on jet behavior is not fully understood yet. The flow and combustion characteristics of a coherent jet were thus investigated at steelmaking temperature using Fluent software, and a detailed chemical kinetic reaction mecha- nism was used in the combustion reaction model. The axial velocity and total temperature of the supersonic jet were measured via hot state experiments. The simulation results were compared with the experimental data and the empirical jet model proposed by Ito and Muchi and good consistency was obtained. The research results indicated that the potential core length of the coherent jet can be prolonged by optimizing the combustion effect of the fuel gas. Besides, the behavior of the supersonic jet in the subsonic section was also investigated, as it is an important factor for controlling the position of the oxygen lance. The investigation indicated that the attenuation of the coherent jet is more notable than that of the conventional jet in the subsonic section.

关键词： Supersonic jet Numerical simulation Mixed fuel gas Flow field Combustion characteristic

葛根素对热应激致牛睾丸支持细胞氧化损伤的保护作用

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中国兽医杂志 2016年第11期52卷 43-46页

作者：丛霞张东君任婷婷张倩朱丽萍李琪曹荣峰田文儒李华涛青岛农业大学动物科技学院山东青岛266109 肥城市畜牧兽医局山东肥城271600

葛根素(Pue)是从中药野葛或甘葛藤根中提取的黄酮类化合物,有明显的抗氧化功能。Pue是否有对热应激时牛睾丸支持细胞(SCs)保护作用尚不清楚。本研究采用42℃热应激1 h,然后34℃恢复6 h。用CCK-8检测细胞存活率;用Hoechst33258检测细胞凋... 详细信息

葛根素(Pue)是从中药野葛或甘葛藤根中提取的黄酮类化合物,有明显的抗氧化功能。Pue是否有对热应激时牛睾丸支持细胞(SCs)保护作用尚不清楚。本研究采用42℃热应激1 h,然后34℃恢复6 h。用CCK-8检测细胞存活率;用Hoechst33258检测细胞凋亡;用分光光度法检测细胞丙二醛(MDA)、超氧化物歧化酶(SOD)、谷胱甘肽过氧化物酶(GSH-Px)和过氧化氢酶(CAT)的变化,以及Western-Blot检测HSP70蛋白表达。结果显示,热应激后细胞存活率下降,细胞发生凋亡,产生氧化损伤。葛根素和维生素E可以极显著降低热应激时细胞MDA含量,显著增加SOD、CAT和GSH-Px活力。Pue与维生素E组相比无显著性差异。此外,葛根素可显著增加受热应激SCs中HSP70蛋白的表达。上述结果表明,葛根素能减少热应激下SCs的氧化损伤,其机制可能与提高抗氧化酶活性及增加热休克蛋白HSP70的表达有关。

关键词：牛睾丸支持细胞葛根素热应激 HSP70 氧化损伤

A quality requirements model and verification approach for system of systems based on description logic

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Frontiers of Information Technology & Electronic Engineering 2017年第3期18卷 346-361页

作者： Qing-long WANG Zhi-xue WANG ting-ting ZHANG Wei-xing zhu College of Command Information Systems PLA University of Science and TechnologyNanjing 210007China Information Management Center PLA University of Science and TechnologyNanjing 210007China

System of systems engineering(So SE) involves the complex procedure of translating capability needs into the high-level requirements for system of systems(So S) and evaluating how the SoS quality requirements meet their capability needs. One of the key issues is to model the So S requirements and automate the verification procedure. To solve the problem of modeling and verification, meta-models are proposed to refine both functional and non-functional characteristics of the So S requirements. A domain-specific modeling language is defined by extending Unified Modeling Language(UML) class and association with fuzzy constructs to model the vague and uncertain concepts of the SoS quality requirements. The efficiency evaluation function of the cloud model is introduced to evaluate the efficiency of the SoS quality requirements. Then a concise algorithm transforms the fuzzy UML models into the description logic(DL) ontology so that the verification can be automated with a DL reasoner. This method implements modeling and verification of high-level So S quality requirements. A crisp case is used to facilitate and demonstrate the correctness and feasibility of this method.

关键词： System of systems(So S) Cloud model Description logic(DL) Requirements verification

Modification of Maxwell model for conductivity prediction of carbon nanotubes-filled polymer composites with tunneling effect

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Applied Mathematics and Mechanics(English Edition) 2025年第1期46卷 25-36页

作者： Jue zhu Longyuan LI Ningtao zhu Zhejiang Provincial Engineering Research Center for the Safety of Pressure Vessel and Pipeline Key Laboratory of Impact and Safety Engineering (Ningbo University) Ministry of Education School of Engineering Computing and Mathematics University of Plymouth Xi'an Zhanshi Testing & Engineering Co.Ltd.

Carbon nanotubes(CNTs) have garnered great attention in recent years due to their outstanding electrical, thermal, and mechanical properties. The incorporation of small amounts of CNTs in polymers can substantially improve the sensitivity of the polymer's electrical conductivity. This paper presents a modified Maxwell model to evaluate the electrical conductivity of CNTs-filled polymer composites by introducing a transition zone to account for the tunneling effect. In this modified Maxwell model, the CNTs-filled polymer composite is modeled as a three-phase composite, consisting of a matrix(polymer), inclusions(CNTs), and a transition zone(tunneling zone). The effective electrical conductivity(EEC) of the composite is calculated based on the volume fractions and electrical conductivities of the matrix, inclusions, and transition zone. The model's validity is confirmed through the use of available test data, which demonstrates its capability to accurately capture the nonlinear conductivity behavior observed in CNTs-polymer composites. This study offers valuable insights into the design of high-performance conductive polymer nanocomposites, and enhances the understanding of electrical conduction mechanisms in CNT-dispersed polymer composites.

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Relationships between Chronic Diseases and Depression among Middleaged and Elderly People in China: A Prospective Study from CHARLS

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Current Medical Science 2020年第5期40卷 858-870页

作者： Chun-hong JIANG Feng zhu ting-ting QIN School of Management Hubei University of EducationWuhan 430205China Department of Biliary-Pancreatic Surgery Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China

Given the rapid increase in the prevalence of chronic diseases in aging populations,this prospective study including 17707 adults aged≥45 years from China Health and Retirement Longitudinal Study was used to estimate the associations between chronic discase,multimorbidity,and depression among middle-aged and elderly adults in China,and explore the mediating *** symptoms were assessed using the 10-item Centre for Epidemiological Studies Depression Scale(CES-D-10)*** chronic physical conditions,including hypertension,diabetes,dyslipidemia,cancer,chronic lung disease,liver disease,heart failure,stroke,kidney disease,arthritis or rheumatism,asthma,digestive disease were *** prevalence rates for physical multimorbidity and depression(CES-D-10≥10)were 43.23%and 36.62%,*** multivariable logistic models and generalized estimating equation(GEE)models,we found all 12 chronic physical conditions,and multimorbidity were significantly associated with *** mobility problems and chronic pain explained more than 30%of the association for all chronic conditions,with particularly high percentages for stroke(51.56%)and cancer(51.06%)in mobility problems and cancer(53.35%)in chronic *** activities of daily living(ADL)explained 34.60%of the stroke-cancer relationship,while sleep problems explained between 10.15%(stroke)and 14.89%(chronic lung disease)of the *** with chronic diseases or multimorbidity are significantly more likely to be *** symptoms involving limitations of ADL and mobility difficulties mediated much of the association between chronic diseases and incident *** symptoms could be targeted for interventions to ameliorate the incidence of depression among individuals with chronic conditions.

关键词： chronic disease multimorbidity depression functional symptoms mediation effect

Kinetics of carbonated decomposition of hydrogarnet with different silica saturation coefficients

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International Journal of Minerals,Metallurgy and Materials 2020年第4期27卷 472-482页

作者： Xiao-feng zhu ting-an Zhang Guo-zhi Lü State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals Lanzhou University of TechnologyLanzhou 730050China School of Material Science and Engineering Lanzhou University of TechnologyLanzhou 730050China Key Laboratory for Ecological Metallurgy of Multimetallic Mineral(Ministry of Education Northeastern UniversityShenyang 110819China Special Metallurgy and Process Engineering Institute School of MetallurgyNortheastern UniversityShenyang 110819China

Carbonated decomposition of hydrogarnet is one of the vital reactions of the calcification–carbonation method,which is designed to dispose of low-grade bauxite and Bayer red mud and is a novel eco-friendly *** this study,the effect of the silica saturation coefficient(x)on the carbonation of hydrogarnet was investigated from the kinetic *** results indicated that the carbonation of hydrogarnets with different x values(x=0.27,0.36,0.70,and 0.73)underwent two stages with significantly different rates,and the kinetic mechanisms of the two stages can be described by the kinetic functions R3 and *** apparent activation energies at Stages 1 and 2 were 41.96–81.64 and 14.80–34.84 kJ/mol,***,the corresponding limiting steps of the two stages were interfacial chemical reaction and diffusion.

关键词： Bayer red mud hydrogarnet calcification carbonation kinetics silica saturation coefficient

无创血流动力学指标在老年呼吸困难鉴别中的临床意义

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实用老年医学 2016年第10期30卷 825-826,829页

作者：王婷婷朱笑笑赵娜王成陈宪海刘庆华山东中医药大学山东省济南市250001 山东大学附属省立医院呼吸科山东省济南市250014

目的探讨无创血流动力学各指标在鉴别老年人呼吸困难中的临床意义。方法将老年急性呼吸困难患者分为心源性呼吸困难组(心源性组)和非心源性呼吸困难组(非心源性组),比较2组间无创血流动力学相关指标的差异。结果心源性组心输出量(CO)、... 详细信息

目的探讨无创血流动力学各指标在鉴别老年人呼吸困难中的临床意义。方法将老年急性呼吸困难患者分为心源性呼吸困难组(心源性组)和非心源性呼吸困难组(非心源性组),比较2组间无创血流动力学相关指标的差异。结果心源性组心输出量(CO)、心脏指数(CI)、心肌收缩指数(ICON)较非心源性组显著降低(P0.05)。结论无创血流动力学监测CO、CI、ICON、STR、PEP对鉴别心源性呼吸困难有重要参考价值,该方法便捷、无创,值得在老年人中推广应用。

关键词：无创血流动力学监测呼吸困难鉴别诊断老年人

A Family of Constacyclic Codes over ■2m+u■2mand Its Application to Quantum Codes

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Chinese Journal of Electronics 2020年第1期29卷 114-121页

作者： TANG Yongsheng YAO ting zhu Shixin KAI Xiaoshan School of Mathematics and Statistics Hefei Normal University School of Mathematics Hefei University of Technology

Let R be the ring ■2m+u■2m,where u2=*** introduce a Gray map from R to ■22m and study(1+u)-constacyclic codes over *** is proved that the image of a(1+u)-constacyclic code length n over R under the Gray map is a distance-invariant binary quasicyclic code of index m and length 2 *** also prove that every code of length 2 mn which is the Gray image of cyclic codes over R of length n is permutation equivalent to a binary quasi-cyclic code of index ***,a family of quantum error-correcting codes obtained from the Calderbank-Shor-Steane(CSS) construction applied to(1+u)-constacyclic codes over R.

关键词： Constacyclic codes Cyclic codes Quasicyclic codes Gray map Quantum codes