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MoS_(2)Lubricate‑Toughened MXene/ANF Composites for Multifunctional Electromagnetic Interference Shielding

Nano-Micro Letters 2025年第2期17卷 358-371页

作者： Jiaen Wang Wei Ming Longfu Chen Tianliang Song Moxi Yele hao zhang Long Yang Gegen Sarula Benliang Liang Luting Yan Guangsheng Wang School of Physical Science and Engineering Beijing Jiaotong UniversityBeijing 100044People’s Republic of China Key Laboratory of Bio‑Inspired Smart Interfacial Science and Technology of Ministry of Education School of ChemistryBeihang UniversityBeijing 100191People’s Republic of China

The design and fabrication of high toughness electromagnetic interference(EMI)shielding composite films with diminished reflection are an imperative task to solve electromagnetic pollution *** MXene/ANF(aramid nanofibers)–MoS_(2)composite films with nacre-like layered structure here are fabricated after the introduction of MoS_(2)into binary MXene/ANF composite *** introduction of MoS_(2)fulfills an impressive“kill three birds with one stone”improvement effect:lubrication toughening mechanical performance,reduction in secondary reflection pollution of electromagnetic wave,and improvement in the performance of photothermal *** the introduction of MoS_(2)into binary MXene/ANF(mass ratio of 50:50),the strain to failure and tensile strength increase from 22.1±1.7%and 105.7±6.4 MPa and to 25.8±0.7%and 167.3±9.1 MPa,*** toughness elevates from 13.0±4.1 to 26.3±0.8 MJ m^(−3)(~102.3%)*** the reflection shielding effectiveness(SE_(R))of MXene/ANF(mass ratio of 50:50)decreases~10.8%.EMI shielding effectiveness(EMI SE)elevates to 41.0 dB(8.2–12.4 GHz);After the introduction of MoS_(2)into binary MXene/ANF(mass ratio of 60:40),the strain to failure increases from 18.3±1.9%to 28.1±0.7%(~53.5%),the SE_(R)decreases~22.2%,and the corresponding EMI SE is 43.9 *** MoS_(2)also leads to a more efficient photothermal conversion performance(~45 to~55℃).Additionally,MXene/ANF–MoS_(2)composite films exhibit excellent electric heating performance,quick temperature elevation(15 s),excellent cycle stability(2,2.5,and 3 V),and long-term stability(2520 s).Combining with excellent mechanical performance with high MXene content,electric heating performance,and photothermal conversion performance,EMI shielding ternary MXene/ANF–MoS_(2)composite films could be applied in many industrial *** work broadens how to achieve a balance between mechanical properties and versatility of composites in the case of high-function fillers.

关键词： MXene-MoS_(2) Lubrication toughening EMI shielding Photothermal conversion Electric heating performance

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Advances in Graphene‑Based Electrode for Triboelectric Nanogenerator

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Nano-Micro Letters 2025年第1期17卷 378-403页

作者： Bin Xie Yuanhui Guo Yun Chen hao zhang Jiawei Xiao Maoxiang Hou Huilong Liu Li Ma Xin Chen Chingping Wong State Key Laboratory of Precision Electronic Manufacturing Technology and Equipment Guangdong University of TechnologyGuangzhou 510006People’s Republic of China School of Electromechanical Engineering Guangdong University of TechnologyGuangzhou 510006People’s Republic of China School of Materials Science and Engineering Georgia Institute of TechnologyAtlantaGA 30332USA

With the continuous development of wearable electronics,wireless sensor networks and other micro-electronic devices,there is an increasingly urgent need for miniature,flexible and efficient nanopower generation *** nanogenerator(TENG)technology can convert small mechanical energy into electricity,which is expected to address this *** the core component of TENG,the choice of electrode materials significantly affects its *** metal electrode materials often suffer from problems such as durability,which limits the further application of ***,as a novel electrode material,shows excellent prospects for application in TENG owing to its unique structure and excellent electrical *** review systematically summarizes the recent research progress and application prospects of TENGs based on graphene *** precision processing methods of graphene electrodes are introduced,and the applications of graphene electrode-based TENGs in various scenarios as well as the enhancement of graphene electrodes for TENG performance are *** addition,the future development of graphene electrode-based TENGs is also prospectively discussed,aiming to promote the continuous advancement of graphene electrode-based TENGs.

关键词： Triboelectric nanogenerator Precision processing Graphene electrode Self-powered sensor

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后路C_(2-3)固定结合顶棒置入与单纯后路C_(2-3)固定治疗不稳定Hangman骨折的比较

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中国组织工程研究 2025年第9期29卷 1848-1854页

作者：张浩王清张建李广州王高举西南医科大学附属医院骨科四川省泸州市646000

背景:Hangman骨折中Ⅱ、ⅡA、Ⅲ型常需手术治疗,手术方式选择存在较大争议,目前均存在术后复位不全及畸形愈合等不足;前期作者团队使用C_(2-3)拉力螺钉结合经口顶棒技术间歇性推顶C2椎体治疗不稳定Hangman骨折,取得了满意的临床疗效,但... 详细信息

背景:Hangman骨折中Ⅱ、ⅡA、Ⅲ型常需手术治疗,手术方式选择存在较大争议,目前均存在术后复位不全及畸形愈合等不足;前期作者团队使用C_(2-3)拉力螺钉结合经口顶棒技术间歇性推顶C2椎体治疗不稳定Hangman骨折,取得了满意的临床疗效,但前期研究样本少,且缺少对照组比较。目的:比较后路C_(2-3)固定结合经口顶棒技术和单纯后路C_(2-3)固定治疗不稳定Hangman骨折的临床疗效。方法:回顾性分析西南医科大学附属医院收治的行后路C_(2-3)固定手术治疗的55例不稳定Hangman骨折患者临床及影像学资料,根据手术方案分为2组,其中23例患者接受后路C_(2-3)固定结合经口顶棒技术治疗(A组),32例接受单纯后路C_(2-3)固定术(B组)。比较两组患者的手术时间、术中出血量、并发症、术前及末次随访时疼痛目测类比评分、颈椎功能障碍指数、美国脊髓损伤协会脊髓损伤分级和患者满意度(Odom’s分级);另外对比各观察时间点C_(2-3)移位和成角及其他影像学指标的变化。结果与结论:①两组患者手术时间、术中出血量和术后并发症发生情况比较差异无显著性意义(P>0.05);②两组患者末次随访颈痛目测类比评分和颈椎功能障碍指数较术前获得显著改善(P0.05);③两组术前C_(2-3)成角和位移差异无显著性意义(P>0.05);术后及末次随访时,两组患者C_(2-3)成角和位移均较术前明显减小,差异有显著性意义(P0.05);术后及末次随访时,A组C_(2-3)位移和成角较B组明显减小,差异有显著性意义(P<0.05);④末次随访时,A组患者均未发生残余畸形,B组发生残余畸形4例(13%,4/32);⑤因此,后路C_(2-3)固定结合经口顶棒技术可能有利于枢椎体复位和稳定,减少畸形愈合,获得更好的复位。

关键词： Hangman骨折顶棒技术后路拉力螺钉骨折复位内固定

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The features of band structures for woodpile three-dimensional photonic crystals with plasma and function dielectric constituents

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Plasma Science and Technology 2018年第10期20卷 51-61页

作者： Haifeng zhang hao zhang College of Electronic and Optical Engineering ＆ College of Microelectronics Nanjing University of Posts and TelecommunicationsNanjing 210023People＇s Republic of China National Electronic Science and Technology Experimental Teaching Demonstrating Center Nanjing University of Posts and TelecommunicationsNanjing 210023People＇s Republic of China National Information and Electronic Technology Virtual Simulation Experiment Teaching Center Nanjing University of Posts and TelecommunicationsNanjing 210023People＇s Republic of China Key Laboratory of Radar Imaging and Microwave Photonics Ministry of EducationNanjing University of Aeronautics and AstronauticsNanjing 210016People＇s Republic of China

The features of the band structures of woodpile three-dimensional （3D） photonic crystals composed of plasma and function dielectric constituents, referred to as function plasma photonic crystals （FPPCs）, are theoretically studied by a modified plane wave expansion method, and the formulas for computing the band structures are derived. The arrangement for the proposed FPPCs is that the function dielectric columns are surrounded by plasma, and the embedded dielectric columns are stacked according to the woodpile lattices, which are arrayed with facecentered-tetragonal symmetry. The relative permittivity of function dielectric rods depends on the function coefficient and space coordinates. The relationships between the parameters for inserted function dielectric rods and plasma and the band structures are also investigated. The computed results illustrate that the obtained PBG can be tuned by those parameters as mentioned above. Compared to dielectric-air PCs, function dielectric PCs and plasma dielectric PCs with the same topology, a wider bandwidth of the photonic band gap can be observed in the proposed FPPCs. The calculated results also show us another alternative way to realize reconfigurable applications with 3D FPPCs.

关键词： plasma photonic crystals function dielectric photonic band gaps plane wave expansion method

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A combined survey to evaluate the thermal behavior of loess for a landslide-prone slope on the Heifangtai terrace in Northwest China

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Journal of Mountain Science 2021年第12期18卷 3247-3260页

作者： zhang hao zhang De-xuan Department of Civil Engineering Shanghai Normal UniversityShanghai 201418China

A combined survey including infrared thermography(IRT)and field-laboratory tests were conducted to analyze the thermal responses and thermal properties of loess on a landslide-prone loess slope in the Heifangtai terrace in Northwest China aiming at preliminarily demonstrating the potential of IRT as a complementary technique to the investigation of irrigation-induced loess *** thermographic surveys corresponding to various solar radiation intensities during the afternoon were carried out on the landslide-prone loess ***,the spatiotemporal distribution of the thermal responses within the observed slope surface was analyzed qualitatively and ***,field and laboratory investigations were also performed on the thermal properties of different landslide *** results indicate that loess,a landslide-prone deposit that usually has a relatively high water content,exhibits different thermal properties and anomalies,including a lower surface temperature and greater thermal inertia,compared to surrounding zones without *** groundwater table and corresponding seepage line could also be obtained by determining the potential boundary between the thermal response distribution of landslide scarps and that of saturated deposits in the presence of *** results of these investigations are expected to provide insight for future endeavors combining infrared thermography with other efficient survey methodologies(e.g.,InSAR,which can monitor the active displacement of a loess slope)to evaluate the activity of this kind of excessive irrigation-induced loess landslide.

关键词： Infrared Thermography Loess landslide The Heifangtai terrace Thermal response Water content

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Achievement of chaotic synchronization trajectories of master-slave manipulators with feedback control strategy

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Acta Mechanica Sinica 2010年第3期26卷 433-439页

作者： Qingkai Han Lina hao hao zhang Bangchun Wen School of Mechanical Engineering and Automation Northeastern University 110004 Shenyang China

This paper addresses a master-slave synchro- nization strategy for complex dynamic systems based on feedback control. This strategy is applied to 3-DOF pla- nar manipulators in order to obtain synchronization in such complicated as chaotic motions of end-effectors. A chaotic curve is selected from Duffing equation as the trajectory of master end-effector and a piecewise approximation method is proposed to accurately represent this chaotic trajectory of end-effectors. The dynamical equations of master-slave manipulators with synchronization controller are derived, and the Lyapunov stability theory is used to determine the stability of this controlled synchronization system. In numer- ical experiments, the synchronous motions of end-effectors as well as three joint angles and torques of master-slave manipulators are studied under the control of the proposed synchronization strategy. It is found that the positive gain matrix affects the implementation of synchronization con- trol strategy. This synchronization control strategy proves the synchronization＇s feasibility and controllability for com- plicated motions generated by master-slave manipulators.

关键词： Master-slave manipulators - Chaoticsynchronization trajectory - Feedback control

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Numerical Study of Thermal Boundary Layer on a Continuous Moving Surface in Power Law Fluids

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Journal of Thermal Science 2007年第3期16卷 243-247页

作者： hao zhang Xinxin zhang Liancun ZHENG Department of Thermal Engineering University of Science and Technology Beijing Beijing 100083 China Department of Mathematics and Mechanics University of Science and Technology Beijing Beijing 100083 China

This paper investigates flow and heat transfer of power law fluids on a continuous moving surface. The temperature distribution is obtained numerically by considering the effect of the power law viscosity on thermal diffusivity and the characteristics of the flow and heat transfer are analyzed. The results show that the distribution of the thermal boundary layer depends not only on the velocity ratio parameter of the plate, but also on the power law index and Prandtl number of fluids.

关键词： Power law fluid thermal boundary layer dimensionless transformation numerical solutions

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An Analysis of the Characteristics of the Thermal Boundary Layer in Power Law Fluid

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Journal of Thermal Science 2008年第3期17卷 233-237页

This paper presents a theoretical analysis of the heat transfer for the boundary layer flow on a continuous moving surface in power law fluid. The expressions of the thermal boundary layer thickness with the different heat conductivity coefficients are obtained according to the theory of the dimensional analysis of fluid dynamics and heat transfer. And the numerical results of CFD agree well with the proposed expressions. The estimate formulas can be successfully applied to giving the thermal boundary layer thickness.

关键词： Thermal boundary layer Power law fluid Dimensional analysis Numerical solutions

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Fast capture and stabilization of Li‐ions via physicochemical dual effects for an ultra‐stable self‐supporting Li metal anode

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Carbon Energy 2023年第9期5卷 88-100页

作者： Xuzi zhang Yue Li hao zhang Ge Li Department of Mechanical Engineering University of AlbertaEdmontonAlbertaCanada Department of Chemical and Materials Engineering University of AlbertaEdmontonAlbertaCanada

Lithium(Li)metal is regarded as one of the most promising anode candidates for next-generation batteries due to its extremely high specific capacity and low redox ***,its application is still hindered by the uncontrolled growth of dendritic Li and huge volume fluctuation during *** address these issues,flexible and self-supporting three-dimensional(3D)interlaced Ndoped carbon nanofibers(NCNFs)coated with uniformly distributed 2D ultrathin NiCo_(2)S_(4)nanosheets(denoted CNCS)were designed to eliminate the intrinsic hotspots for Li *** dual effects of CNCS arise from limited surface Li diffusivity with a higher Li affinity,leading to uniform Li nucleation and less random accumulation of Li,as confirmed by ab initio molecular dynamics *** to the unique structure,exchange current density is reduced significantly and metallic Li is further contained within the interspace between the NCNF and NiCo_(2)S_(4)nanosheets,preventing the formation of dendritic *** symmetric cell with a Li/CNCS composite anode shows a long-running lifespan for almost 1200 h,with an exceptionally low and stable overpotential under 1mA cm^(-2)/1 mAh cm^(-2).A full cell coupled with a LiFePO4 cathode at a low N/P ratio of 2.45 shows typical voltage profiles but more significantly enhanced performance than that of a LiFePO4 cathode coupled with a bare Li anode.

关键词： 3D scaffold design Li affinity Li diffusivity Li metal anode long lifespan

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Reduction Kinetics of Fe-based Oxygen Carriers Using Syngas in a Honeycomb Fixed-Bed Reactor for Chemical-Looping Combustion

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Journal of Thermal Science 2020年第1期29卷 13-24页

作者： LIU Xiangyu zhang hao HONG Hui Institute of Engineering Thermophysics Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

Chemical-looping combustion(CLC)is considered to be a vital method for utilizing hydrocarbon fuel with low carbon emissions.A honeycomb fixed-bed reactor is a new kind of reactor for ***,the further application of the reactor is limited by the inadequacy of the kinetic equations for *** this paper,the experimental studies on the kinetic of Fe-based oxygen carriers were carried out by the CLC experiments using syngas which was obtained from one typical type of coal gasification *** experimental results show that there were two individual stages for the kinetic characteristics during the fuel reaction ***,the CLC fuel reaction process could be described by a two-stage unreacted-core shrinking model and the reaction rate equations for each of the two phases were *** both stages,the dominant resistances were *** activation energy and the reaction order in both stages were calculated respectively as *** the experimental results of reaction rate with the calculated results of the obtained rate equations,it could be clearly seen that the reaction kinetics model was appropriate for the CLC in the honeycomb *** work is expected to provide a guideline for the future development and industrial design of the honeycomb CLC reactors from the perspective of kinetics.

关键词： chemical-looping combustion honeycomb reactor reaction kinetics

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