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Facile preparation of core-shell Si@Li4Ti5O12 nanocomposite as large-capacity lithium-ion battery anode

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Journal of Energy Chemistry 2020年第1期29卷 89-98,I0004页

作者： Mengjing Liu Hanyang Gao Guoxin Hu kunxu Zhu Hao Huang School of Mechanical and Power Engineering Shanghai Jiao Tong UniversityShanghai 200240China School of Mechanical Engineering Hangzhou Dianzi UniversityHangzhou 310018ZhejiangChina Shanghai Marine Diesel Engine Research Institute Shanghai 200090China

As a promising alternative anode material,silicon(Si)presents a larger capacity than the commercial anode to achieve large capacity lithium-ion ***,the application of pure Si as anode is hampered by limitations such as volume expansion,low conductivity and unstable solid electrolyte *** break through these limitations,the core-shell Si@Li4Ti5O12nanocomposite,which was prepared via in-situ self-assembly reaction and decompressive boiling fast concentration method,was proposed in this *** anode combines the advantages of nano-sized Si particle and pure Li4Ti5O12(LTO)coating layer,improving the performance of the lithium-ion *** Si@Li4Ti5O12 anode displays a high initial discharge/charge specific capacity of 1756/1383 m Ahg^-1 at 500 mAg^-1(representing high initial coulombic efficiency of 78.8%),a large rate capability(specific capacity of 620 mAhg^-1 at4000 mAg^-1),an outstanding cycling stability(reversible specific capacity of 883 mAhg^-1 after 150 cycles)and a low volume expansion rate(only 3.3% after 150 cycles).Moreover,the synthesis process shows the merits of efficiency,simplicity,and economy,providing a reliable method to fabricate large capacity Si@Li4Ti5O12nanocomposite anode materials for practical lithium-ion batteries.

关键词： Si@Li4Ti5O12 composites Core-shell nanoparticles In-situ self-assembly Decompressive boiling concentration Lithium-ion battery anode

Multi-Objective Optimization of the Ultrasonic Scalpel Rod and Tip with Improved Performance:Vibration Frequency,Amplitude,and Service Life

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Chinese Journal of Mechanical Engineering 2024年第4期37卷 107-119页

作者： Jiaqi Zhao Yuhao Zhai Xuzhe Jia Naiwen Deng kunxu Li Guangchao Han Rong Chen Dong wang Wei Bai School of Mechanical Engineering and Electronic Information China University of GeosciencesWuhan 430074China Shenzhen Research Institute China University of GeosciencesShenzhen 518057China College of Engineering Mathematics and Physical SciencesUniversity of ExeterExeter EX44QFUK Shenzhen Huazhong University of Science and Technology Research Institute Shenzhen 518000China

Ultrasonic scalpel design for minimally invasive surgical procedures is mainly focused on optimizing cutting ***,an important issue is the low fatigue life of traditional ultrasonic scalpels,which affects their long-term reliability and effectiveness and creates hidden dangers for *** this study,a multi-objective optimal design for the cutting performance and fatigue life of ultrasonic scalpels was proposed using finite element analysis and fatigue *** optimal design parameters of resonance frequency and amplitude were *** setting the transition fillet and keeping the gain structure away from the node position to enable the scalpel to have a high service life with excellent cutting *** frequency modulation method of setting the vibration node bosses at the node position and setting the vibration antinode grooves at the antinode position was ***,the mechanism of the influence of various design elements,such as tip,shank,node position,and antinode position,on the resonance frequency,amplitude,and fatigue life of the ultrasonic scalpel was analyzed,and the optimal design principles of the ultrasonic scalpel were *** proposed ultrasonic scalpel design was confirmed by simulations,impedance measurements,and liver tissue cutting experiments,demonstrating its feasibility and enhanced *** research introduces innovative design strategies to improve the fatigue life and performance of ultrasonic scalpels to address an important issue in minimally invasive surgery.

关键词： Multi-objective optimal design Minimally invasive surgical procedures Service life Ultrasonic scalpel

Ascorbate oxidase electrochemical biosensor based on the biocompatible poly(3,4-ethylenedioxythiophene) matrices for agricultural application in crops

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Chinese Chemical Letters 2012年第2期23卷 221-224页

作者： Yang Ping Wen Li Min Lu Dong Li Ming Liu Hao Hua He Jing kunxu Key Lab of Crop Physiology Ecology and Genetic BreedingMinistry of EducationJiangxi Agricultural UniversityNanchang 330045China Jiangxi Key Lab of Organic Chemistry Jiangxi Science and Technology Normal UniversityNanchang 330013China

The vitamin C（VC） in crops was successfully determined using ascorbate oxidase（AO） electrochemical biosensor based on the biocompatible poly（3,4-ethylenedioxythiophene）（PEDOT） matrices,which was easily prepared by one-step electrodeposition technique in ionic liquid *** fabricated biosensor displayed excellent bioelectrocatalytic performance to the oxidation of VC,wide linear range,low detection limit,fast response time,good operational and storage stability,the good results of the determination of VC in vegetable crops indicated that the fabricated biosensor will be a good candidate for the physiological and biochemical studies of crops in near future.

关键词： Biosensor Agricultural application Ionic liquid microemulsions Ascorbate oxidase Poly(3 4-ethyl-enedioxythiophene) Vitamin C

Bazi Bushen alleviates reproductive aging in aged male mice

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Chinese Journal of Natural Medicines 2024年第5期22卷 416-425页

作者： MA Kun LI Mengnan SONG Yahui MAO Xinjing ZHANG Shaolan ZHANG Yaping JIANG Yuning JI Chuanyuan NIU kunxu LI Hongrong HOU Yunlong WEI Cong Graduate School Hebei University of Chinese MedicineShijiazhuang 050091China State Key Laboratory for Innovation and Transformation of Luobing Theory Shijiazhuang 050035China Key Laboratory of State Administration of TCM(Cardio-Cerebral Vessel Collateral Disease) Shijiazhuang 050035China College of Traditional Chinese Medicine·College of Integrated Traditional Chinese and Western Medicine Nanjing University of Chinese MedicineNanjing 210023China Hebei Provincial Key Laboratory of Luobing Shijiazhuang 050035China Key Disciplines of State Administration of TCM for Luobing Shijiazhuang 050035China

Bazi Bushen(BZBS),a traditional Chinese medicine(TCM),has demonstrated therapeutic efficacy in testicular dysfunction within D-galactose and NaNO_(2)mouse *** study aimed to ascertain if BZBS could also mitigate the decline in testicular function associated with natural ***,male aged mice were employed to evaluate the preventive effects of BZBS on male reproductive *** was achieved by assessing sex hormone production,testicular histomorphology,and *** to the untreated aged control group,BZBS administration elevated the levels of sex hormones and spermatocyte populations and preserved normal testicular structure in aged ***,spermatogenesis was *** analyses,including malondialdehyde(MDA)assays and real-time PCR,indicated that BZBS diminished testicular oxidative stress and the inflammatory *** these findings,mice treated with BZBS exhibited reductions in the populations of senescent and apoptotic cells within the seminiferous tubules,suggesting alleviated cellular *** contrast,we observed that rapamycin,a drug known for its longevity benefits,induced excessive testicular apoptosis and did not decrease lipid ***,our results highlight BZBS’s promising clinical potential in counteracting male reproductive aging,underlining its mechanisms of action.

关键词： Traditional Chinese medicine Male reproductive aging Spermatogenic cells Cell senescence Apoptosis

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领结芳烃: 刺激响应性荧光双环分子

有机化学 2020年第2期40卷 549-550页

作者：滕坤旭杨清正北京师范大学化学学院北京100875

伴随着超分子化学的诞生与发展,大环分子一直是超分子体系的重要构筑基元[1].几十年来,以冠醚、环糊精、杯芳烃、葫芦脲、柱芳烃等为代表大环分子因其优异的客体识别性质而被广泛用于功能超分子体系的设计与构建[2].然而上述大环主体分... 详细信息

伴随着超分子化学的诞生与发展,大环分子一直是超分子体系的重要构筑基元[1].几十年来,以冠醚、环糊精、杯芳烃、葫芦脲、柱芳烃等为代表大环分子因其优异的客体识别性质而被广泛用于功能超分子体系的设计与构建[2].然而上述大环主体分子的基本分子骨架并不具备荧光基团,因此通常需要依赖客体分子的荧光性质或者通过多步反应对大环结构作进一步化学修饰才能实现荧光主客体体系的构筑[3].鉴于荧光性质在检测、传感、成像等领域的重要用途,发展具有丰富光物理性质的新型大环骨架是一个亟需突破的重要的研究方向.

关键词：超分子化学荧光性质客体分子荧光基团杯芳烃柱芳烃冠醚光物理性质

Numerical Dissipation in Shock Capturing Schemes

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Numerical Dissipation in Shock Capturing Schemes

考虑共同关注区域静态交谈群组检测的机器人导航及行为评价

第四届海峡两岸计算流体力学学术研讨会

作者： kunxu Mathematics Department,Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong

＜正＞ Even though many shock capturing schemes have been successfully developed in past decades, the analysis of the numerical dissipative mechanism in them are inadequate. In this paper, we are going to introduce the kinematic and dynamic origion of the numerical dissipation and distinguish their roles in the capturing of numerical shock waves. At end, the gas-kinetic scheme will be introduced, where the kinematic and dynamic dissipation have both been accounted for in its numerical discretization, [this work was supported by the research grant council of Hong Kong].

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机器人 2022年第4期44卷 494-503页

作者：周磊赵坤旭宋一诺刘景泰南开大学人工智能学院机器人与信息自动化研究所天津300350 天津市智能机器人技术重点实验室天津300350

针对静态交谈群组,提出了一种基于共同关注区域的F型社交关系(F-formation)检测算法。该算法将行人的位置、方向作为输入构造群组的共同关注区域,采用一个基于滑动窗口的最大值滤波器检测群组中心,然后根据群组中心进行群组聚类。在实... 详细信息

针对静态交谈群组,提出了一种基于共同关注区域的F型社交关系(F-formation)检测算法。该算法将行人的位置、方向作为输入构造群组的共同关注区域,采用一个基于滑动窗口的最大值滤波器检测群组中心,然后根据群组中心进行群组聚类。在实现静态交谈群组检测的基础上,构造群组舒适空间,并基于多层代价地图机制将群组舒适空间模型应用于时间依赖的A*路径规划算法,实现了考虑群组舒适的移动机器人导航。除此之外,具有社交感知能力的机器人导航行为给予人的舒适感受难以定量评价,本文搭建了一个基于图卷积网络的机器人行为评价模型。实验结果显示该评价网络达到了与人类相似的机器人行为评价能力,可视化分析结果显示了评价网络结果的合理性。通过评价网络对机器人轨迹进行评估,发现考虑静态交谈群组的机器人能够产生更加满足人类舒适感受的运动轨迹。

关键词：静态交谈群组检测 F型社交关系共同关注区域群组舒适空间机器人社交导航图卷积网络

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冗余CAN总线在机载机电管理系统中的应用

电子技术（上海） 2012年第7期39卷 51-54页

作者：张坤旭航空计算技术研究所

随着计算技术和总线技术的高速发展,使机电航空电子设备系统综合不但成为可能而且也成为趋势,CAN总线作为成熟的现场总线,通过工艺和技术改进,已在船舶和航天等领域下得到了较为广泛可靠的应用。文章针对机电综合管理系统的设计需求,提... 详细信息

随着计算技术和总线技术的高速发展,使机电航空电子设备系统综合不但成为可能而且也成为趋势,CAN总线作为成熟的现场总线,通过工艺和技术改进,已在船舶和航天等领域下得到了较为广泛可靠的应用。文章针对机电综合管理系统的设计需求,提出了一种基于冗余CAN总线的通信方法,并运用裁剪过的CANaerospace高层协议实现了机电系统余度管理和通讯方法。通过低成本的冗余CAN总线通讯技术,不但有效解决了总线通信的故障问题并提高了通信的可靠性,而且降低了系统的开发成本。

关键词： CAN总线机载机电管理系统冗余调度

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基于声发射监测的双轴加载岩石破裂研究

金属矿山 2013年第6期42卷 5-8,12页

作者：徐世达姜坤序蔺甲深部金属矿山安全开采教育部重点实验室中国有色集团抚顺红透山矿业有限公司

选取中粗粒花岗岩,应用声发射技术,通过施加不同侧向压力,对双轴加载方式下花岗岩试样破裂过程中的声发射序列特征进行研究,着重分析了抗压强度、声发射活动特征与侧向压力的关系。研究表明:侧应力增大了竖向抗压强度,加载端临界侧向应... 详细信息

选取中粗粒花岗岩,应用声发射技术,通过施加不同侧向压力,对双轴加载方式下花岗岩试样破裂过程中的声发射序列特征进行研究,着重分析了抗压强度、声发射活动特征与侧向压力的关系。研究表明:侧应力增大了竖向抗压强度,加载端临界侧向应变是侧向应力影响竖向抗压强度的关键。当加载端临界侧向应变为正值,即试件在该方向受拉时,侧向应力对竖向抗压强度的增强起到正作用;反之,起负作用。同时,侧压力对声发射序列特征影响也比较明显。侧压力较小时,岩石在加载初期只有较少的声发射事件,在破坏前出现大量的声发射事件,声发射序列在应力峰值前表现为单峰型;侧应力较大时,较小的应力扰动即可诱发微裂隙的产生和发展,产生较多的声发射事件,致使声发射序列表现为群震型。这对于岩石破裂失稳预报很有意义。

关键词：声发射双轴加载侧向压力声发射序列特征