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Effect of Ti Additions on Mechanical and Thermodynamic Properties of W-Ti Alloys: A First-principles Study

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Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 246-257页

作者： ZHANG Jian NIE wei HUANG Jin ZHU Ke LIU Ruxia ZHANG Ruizhi LUO Guoqiang SHEN Qiang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Institute for Carbon Neutrality University of Science and Technology BeijingBeijing 100083China

The mechanical and thermodynamic properties of W-Ti alloys(including W_(15)Ti_(1),W_(14)Ti_(2),W_(12)Ti_(4) and W_(8)Ti_(8) alloys)were investigated by the first-principles approach based on density functional *** results indicate that W-Ti alloys except W_(8)Ti_(8) are thermodynamically *** modulus and hardness of W-Ti alloys are smaller than those of pure tungsten and gradually decrease with increasing Ti ***,their B/G ratios and Poisson's ratios exceed those of pure tungsten,suggesting that the introduction of Ti decreases the mechanical strength while enhancing the ductility of W-Ti *** thermal expansion coefficients for W-Ti alloys all surpass those of pure tungsten,indicating that the introduction of titanium exacerbates the thermal expansion behavior of W-Ti ***,elevated pressure has the capacity to suppress the thermal expansion tendencies in titanium-doped tungsten *** study offers theoretical insights for the design of nuclear materials by exploring the mechanical and thermodynamic properties of W-Ti alloys.

关键词： first-principles mechanical properties thermodynamic properties tungsten-titanium alloys

SYNTHEsiS AND PROPERTIES OF BIFUNCTIOnaL MAGNETIC-OPTICAL naNOMATERIALS:Fe_2O_3@PDMAEMA-CAPPED Ⅱ－Ⅵ SEMICONDUCTOR QUANTUM DOTS naNOCOMPOsiTES

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Chinese Journal of Polymer Science 2013年第9期31卷 1233-1241页

作者： na-na Zhao wei Nie Jun Mao wei-cai Wang Xiang-ling Ji State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences

A facile route to synthesize a new type of multifunctional nanocomposites is reported. Here, PDMAEMA （poly[2- （dimethylamino）ethyl] methacrylate） is a key macromolecule serving as a bridge between magnetic FeaO3 nanoparticles and luminescent quantum dots. Both Fe203 nanoparticles and II-VI semiconductor quantum dots with a narrow size distribution are synthesized through a two-phase thermal approach. Subsequently, the atom transfer radical polymerization （ATRP） technique was applied to prepare magnetic Fe203@PDMAEMA core-shell nanoparticles. The thickness of PDMAEMA shell can be easily controlled by adjusting the reaction time. Finally, the ligand exchange method was exploited to modify II-VI quantum dot with amine-containing polymer of PDMAEMA, which led to quantum dot securely bound by Fe203@PDMAEMA core-shell nanoparticle to form a multifunctional nanocomposite. The resulting nanocomposite remains variable emission by tuning the II-VI semiconductor type and particle size and shows/arc at 49 kA/m and Tb at 16 K from Fe2O3 nanoparticles. The self-assembled behavior for the resulting samples is also discussed.

关键词： Bifunctional nanocomposite Magnetic-optical PDMAEMA Semiconductor ATRP Two-phase method.

Sequence-activated chemiluminescence probes: programmable illumination for high-contrast in vivo sensing and imaging

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Science China Chemistry 2025年第01期 26-34页

作者： Yutao Zhang Juan Li wei-Hong Zhu Zhiqian Guo Shanghai Key Laboratory of Functional Materials Chemistry Joint International Research Laboratory of Precision Chemistry and Molecular Engineering Institute of Fine Chemicals School of Chemistry and Molecular Engineering East China University of Science and Technology State Key Laboratory of Bioreactor Engineering Shanghai Frontier Science Research Base of Optogenetic Techniques for Cell MetabolismEast China University of Science & Technology

Sequence-activated chemiluminescence(CL) technique offers a unique approach to detecting specific biomolecules or cellular events with high sensitivity and spatial resolution. The fundamental principle behind sequence-activated CL probes involves tailoring highly-controllable CL signals in response to specific sequences or events of interest, thus enabling high-contrast signals under complex physiological conditions. This sequential activation could be triggered by enzymes, reactive oxygen species(ROS), biothiols or changes in the microenvironment. These unique sequence-activated CL probes bestow several advantages, including minimal background, deep-tissue penetration, and the ability of non-invasive or minimally invasive detection. The sequence-activated CL techniques represent a significant advancement in molecular imaging and diagnostics. In this mini-review, we focus on the latest developments in sequential CL probes, addressing the technical challenges and discussing the future trajectory by harnessing CL signaling and molecular recognition.

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Enhancement of motor functional recovery in thoracic spinal cord injury: voluntary wheel running versus forced treadmill exercise

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Neural Regeneration Research 2025年第3期20卷 836-844页

作者： Do-Hun Lee Dan Cao Younghye Moon Chen Chen nai-Kui Liu Xiao-Ming Xu wei Wu Spinal Cord and Brain Injury Research Group Stark Neurosciences Research InstituteIndiana University School of MedicineIndianapolisINUSA Department of Neurological Surgery Indiana University School of MedicineIndianapolisINUSA Department of Neuroscience Baylor College of MedicineHoustonTXUSA

Spinal cord injury necessitates effective rehabilitation strategies, with exercise therapies showing promise in promoting recovery. This study investigated the impact of rehabilitation exercise on functional recovery and morphological changes following thoracic contusive spinal cord injury. After a 7-day recovery period after spinal cord injury, mice were assigned to either a trained group(10 weeks of voluntary running wheel or forced treadmill exercise) or an untrained group. Bi-weekly assessments revealed that the exercise-trained group, particularly the voluntary wheel exercise subgroup, displayed significantly improved locomotor recovery, more plasticity of dopaminergic and serotonin modulation compared with the untrained group. Additionally, exercise interventions led to gait pattern restoration and enhanced transcranial magnetic motor-evoked potentials. Despite consistent injury areas across groups, exercise training promoted terminal innervation of descending axons. In summary, voluntary wheel exercise shows promise for enhancing outcomes after thoracic contusive spinal cord injury, emphasizing the role of exercise modality in promoting recovery and morphological changes in spinal cord injuries. Our findings will influence future strategies for rehabilitation exercises, restoring functional movement after spinal cord injury.

关键词： behavioral assessment motor function neural plasticity running wheel exercise spinal cord injury treadmill exercise voluntary exercise

Recent progress in constructing fluorinated solid-electrolyte interphases for stable lithium metal anodes

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 270-291页

作者： Di Zhang Pengfei Lv wei Qin Xin He Yuanhua He Civil Aircraft Fire Science and Safety Engineering Key Laboratory of sichuan Province College of Civil Aviation Safety EngineeringCivil Aviation Flight University of ChinaGuanghan 618307China School of Chemical Engineering Sichuan UniversityChengdu 610065China

Lithium metal batteries(LMBs)are emerging as a promising energy storage solution owing to their high energy density and specific ***,the non-uniform plating of lithium and the potential rupture of the solid-electrolyte interphase(SEI)during extended cycling use may result in dendrite growth,which can penetrate the separator and pose significant short-circuit *** a stable SEI is essential for the long-term operation of the ***-rich SEI has garnered significant attention for its ability to effectively passivate electrodes,regulate lithium deposition,and inhibit electrolyte *** the structural components and preparation methods of existing fluorinated SEI is crucial for optimizing lithium metal anode *** paper reviews the research on optimizing LiF passivation interfaces to protect lithium metal *** focuses on four types of compositions in fluorinated SEI that work synergistically to enhance SEI *** instance,combining compounds with LiF can further enhance the mechanical strength and ionic conductivity of the *** metals with LiF significantly improves electrochemical performance at the SEI/anode interface,with a necessary focus on reducing electron tunneling ***,incorporating polymers with LiF offers balanced improvements in interfacial toughness and ionic conductivity,though maintaining structural stability over long cycles remains a critical area for future *** alloys combined with LiF increase surface energy and lithium affinity,challenges such as dendrite growth and volume expansion *** summary,this paper emphasizes the crucial role of interfacial structures in LMBs and offers comprehensive guidance for future design and development efforts in battery technology.

关键词： LiF lithium metal anodes solid-electrolyte interphase interface cycling stability

成渝地区双城经济圈旅游共生水平测度及协同发展研究

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四川师范大学学报（自然科学版） 2025年第1期48卷 94-104页

作者：司嵬樊丹王冲四川旅游学院旅游文化产业学院四川成都610100 四川旅游学院大数据与统计学院四川成都610100 四川旅游学院文旅融合发展研究中心四川成都610100

基于共生理论和社会网络分析,从成渝地区旅游同质度、关联度、外向功能强度3个维度测评并分析成渝地区双城经济圈旅游业共生水平现状.通过分析得出:成渝地区双城经济圈旅游业的同质度和重合度均较高,成都市、重庆主城区、渝西毗邻片区3... 详细信息

基于共生理论和社会网络分析,从成渝地区旅游同质度、关联度、外向功能强度3个维度测评并分析成渝地区双城经济圈旅游业共生水平现状.通过分析得出:成渝地区双城经济圈旅游业的同质度和重合度均较高,成都市、重庆主城区、渝西毗邻片区3个片区处于成渝双城经济圈旅游共生的中心主导地位,成都是连接四川省其他地区和重庆片区的桥梁.广安市、达州市、资阳市与重庆地区虽联系较多,但是外向功能强度不高,还未发挥出旅游的带动和桥梁作用.成渝地区双城经济圈中旅游关系存在4个子群,重庆地区与川南地区子群具有较强的影响力,川东北与重庆毗邻地区是最具潜力子群.据此,从建立分工基础上的对称互惠一体化共生模式、营造良好的旅游市场一体化共生环境、打破行政区划创造多元旅游共生界面3个方面提出成渝地区双城经济圈旅游共生发展的对策建议.

关键词：成渝双城经济圈旅游共生社会网络分析区域协同

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Influence of crack characteristics on the morphological development of Benggang and hydrological processes

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Journal of Mountain Science 2023年第7期20卷 1900-1910页

作者： LIU wei-ping WANG Shu-han TIAN si-wen OUYANG Guo-quan HU Li-na YUAN Zhi-jun School of Civil Engineering and Architecture Nanchang UniversityNanchang 330031China

Benggang is a special type of soil erosion,which widely distributes in the granite residual soil area of southern *** to the influence of local climate and topography,shallow cracks having different morphological characteristics are easily formed on the slope *** shallow cracks damage the surface structure of the slope and accelerate water infiltration,making it easier to cause severe soil and water ***,the mechanism of Benggang process is still unclear,especially for slopes with different shallow crack *** this study,granite residual soil was collected from Benngang erosion area in Yudu County,Jiangxi Province,southern *** experimental treatments with slope surface crack rates of 0%,5.23%,and 11.70%were *** monitoring of moisture content and soil temperature in the slope were carried out during rainfall,and the characteristics of preferential flow were monitored with different crack *** development and evolution process of Benggang with different crack rates were *** show that high surface crack rate of the shallow surface on the slope accelerated the development of shallow gully erosion,leading to premature occurrence of gully *** the shallow crack rate increased from 0%to 5.23%and 11.70%,the width-depth ratio of the rills at the slope bottom increased from 0.69 to 1.02 and 1.16,*** the same time,a correlation between moisture and temperature data was observed for the process of water-heat coupled *** upper soil temperature of slope decreased quickly due to preferential *** simultaneous monitoring of soil moisture and temperature can effectively track preferential flow and indicate the water *** data was a more sensitive indicator of the seepage paths of preferential flow compared to moisture data.

关键词： Granite residual soil Benggang Crack characteristics Preferential flow

simulation of two-phase debris flow scouring bridge pier

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Journal of Mountain Science 2017年第11期14卷 2168-2181页

作者： LIU wei HE si-ming Institute of Mountain Hazards and Environment (IMHE) Chinese Academy of Sciences Key laboratory of Mountain Hazards and Earth Surface Process Chinese Academy of Sciences Center for Excellence in Tibetan Plateau Earth Sciences Chinese Academy of Sciences

Debris flows are typical two-phase flows, which commonly accompany erosion in mountainous areas, and may destroy bridge engineering by scouring. In this study, a physically-based two-phase model is applied for the simulation of debris flow scouring of bridge pier. In this model, the shear stress of debris flow on an erodible bed is considered to be a function of the solid shear stress, fluid shear stress, and volume fraction; accordingly, the erosion is incorporated into the two-phase model. Using a highaccuracy computational scheme based on the finite volume method, the model is employed for simulating a dynamic debris flow over an erodible bed. The numerical results are consistent with the experimental data, and verify the feasibility of the two-phase model. Moreover, a simple numerical test is performed to exhibit the fundamental behaviour of debris flow scouring of bridge pier, which shows that the degree of erosion on each side of the pier is higher compared to other areas. The scouring depth is influenced by the variations of solid volume fraction and velocity of debris flow and pier width.

关键词： Pier scouring Debris flow Two-phasemodel Numerical simulation

SensFL:Privacy-Preserving Vertical Federated Learning with Sensitive Regularization

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Computer Modeling in Engineering & Sciences 2025年第1期142卷 385-404页

作者： Chongzhen Zhang Zhichen Liu Xiangrui Xu Fuqiang Hu Jiao Dai Baigen Cai wei Wang School of Automation and Intelligence Beijing Jiaotong UniversityBeijing100044China Shuohuang Railway Development Co. Ltd.National Energy GroupCangzhou062350China Beijing Key Laboratory of Security and Privacy in Intelligent Transportation School of Computer Science and TechnologyBeijing Jiaotong UniversityBeijing100044China

In the realm of Intelligent Railway Transportation Systems,effective multi-party collaboration is crucial due to concerns over privacy and data *** Federated Learning(VFL)has emerged as a promising approach to facilitate such collaboration,allowing diverse entities to collectively enhance machine learning models without the need to share sensitive training ***,existing works have highlighted VFL’s susceptibility to privacy inference attacks,where an honest but curious server could potentially reconstruct a client’s raw data from embeddings uploaded by the *** vulnerability poses a significant threat to VFL-based intelligent railway transportation *** this paper,we introduce SensFL,a novel privacy-enhancing method to against privacy inference attacks in ***,SensFL integrates regularization of the sensitivity of embeddings to the original data into the model training process,effectively limiting the information contained in shared *** reducing the sensitivity of embeddings to the original data,SensFL can effectively resist reverse privacy attacks and prevent the reconstruction of the original data from the *** experiments were conducted on four distinct datasets and three different models to demonstrate the efficacy of *** results show that SensFL can effectively mitigate privacy inference attacks while maintaining the accuracy of the primary learning *** results underscore SensFL’s potential to advance privacy protection technologies within VFL-based intelligent railway systems,addressing critical security concerns in collaborative learning environments.

关键词： Vertical federated learning privacy defenses