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Albumin nanoassembly bi-directionally manipulated ferroptosis in tumor and CD8^(+)T cells for triple-negative breast cancer therapy 被引量:1
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作者 Ting Yang Zihan Liu +9 位作者 Zixuan Fu Xiaojie Zhang Yongjin Cao Qiangwei Liang Jiale Miao Hao Yang Tong Zhang Jing Hei Weiqing Ni Yanhua Liu 《Asian Journal of Pharmaceutical Sciences》 2025年第2期146-159,共14页
Ferroptosis can serve as a potent strategy for regulating cell death via lipid peroxidation and the imbalance of the antioxidant system resulting from iron accumulation in triple-negative breast cancer(TNBC)therapy.Ho... Ferroptosis can serve as a potent strategy for regulating cell death via lipid peroxidation and the imbalance of the antioxidant system resulting from iron accumulation in triple-negative breast cancer(TNBC)therapy.However,the ferroptosis accompanied with down-regulation of glutathione peroxidase 4(GPX4)lead to CD36-mediated tumor-infiltrating CD8^(+)T cells uptaking fatty acids,resulting in the negative action on immunotherapeutic efficacy.Herein,the albumin nanoparticles,abbreviated as LHS NPs,were designed by co-assembly of hemin,linoleic acid-cystamine,and a CD36 inhibitor sulfosuccinimide oleate,to bi-directionally manipulated ferroptosis in tumor and CD8^(+)T cells for TNBC therapy.LHS NPs exerted more efficient reactive oxygen species generation,glutathione depletion and malondialdehyde production by the combinatory strategy of classical and non-classical ferroptosis modes,which amplified the positive action on ferroptosis in tumor cells.Meanwhile,LHS manipulated the negative action of ferroptosis by inhibiting the CD36 mediated-lipid peroxidation in CD8^(+)T cells,thereby activating the immunotherapeutic efficacy with the improvements on induction of immunogenic cell death,proliferation of CD4+CD8^(+)T cells and natural killer cells,alleviation immunosuppressive regulatory T cells and myeloid-derived suppressor cells,and repolarization of the M2-to M1-phenotype tumor-associated macrophages.Thus,LHS NPs demonstrated an improved antitumor efficacy in suppressing the tumor growth and lungmetastasis of 4T1-tumormice.Our work gives novel insights for the bi-directionally manipulating ferroptosis in tumor and CD8^(+)T cells on TNBC chemoimmunotherapy. 展开更多
关键词 Albumin nanoassembly Bi-directionally manipulated ferroptosis Lipid peroxidation CD36-mediated CD8^(+)T cell ferroptosis Triple-negative breast cancer
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Minimally manipulated autologous adherent bone marrow cells (ABMCs):a promising cell therapy of spinal cord injury 被引量:3
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作者 Kamana Misra Hatem E.Sabaawy 《Neural Regeneration Research》 SCIE CAS CSCD 2015年第7期1058-1060,共3页
Spinal cord injury(SCI)is a devastating ailment that results in drastic life style alterations for the patients and their family members(Mc Donald and Sadowsky,2002).Damage post injury causes necrosis,edema,hemorr... Spinal cord injury(SCI)is a devastating ailment that results in drastic life style alterations for the patients and their family members(Mc Donald and Sadowsky,2002).Damage post injury causes necrosis,edema,hemorrhage and vasospasm.Post injury,secondary damage is caused by ischemia, 展开更多
关键词 BONE CELL Minimally manipulated autologous adherent bone marrow cells a promising cell therapy of spinal cord injury ABMCs MSCS
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Alopecia treatment using minimally manipulated human umbilical cord-derived mesenchymal stem cells:Three case reports and review of literature 被引量:6
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作者 Hyunjun Ahn Sang Yeon Lee +1 位作者 Won Ju Jung Kye-Ho Lee 《World Journal of Clinical Cases》 SCIE 2021年第15期3741-3751,共11页
BACKGROUND Alopecia areata(AA)is a common autoimmune disease characterized by hair loss.AA appears in extensive forms,such as progressive and diffusing hair loss(diffuse AA),a total loss of scalp hair(alopecia totalis... BACKGROUND Alopecia areata(AA)is a common autoimmune disease characterized by hair loss.AA appears in extensive forms,such as progressive and diffusing hair loss(diffuse AA),a total loss of scalp hair(alopecia totalis),and complete loss of hair over the entire body(alopecia universalis).Recently,mesenchymal stem cells(MSCs)have been identified as a therapeutic alternative for autoimmune diseases.For this reason,preclinical and case studies of AA and related diseases using MSCs have been conducted.CASE SUMMARY Case 1:A 55-year-old woman suffered from AA in two areas of the scalp.She was given 15 rounds of minimally manipulated umbilical cord-MSCs(MM-UC-MSCs)over 6 mo.The AA gradually improved 3 mo after the first round.The patient was cured,and AA did not recur.Case 2:A 30-year-old woman,with history of local steroid hormone injections,suffered from AA in one area on the scalp.She was given two rounds of MM-UC-MSCs over 1 mo.The AA immediately improved after the first round.The patient was cured,and AA did not recur.Case 3:A 20-year-old woman,who was diagnosed with alopecia universalis at the age of 12,was given 14 rounds of MM-UC-MSCs over 12 mo.Her hair began to grow about 3 mo after the first round.The patient was cured,and alopecia universalis did not recur.CONCLUSION MM-UC-MSC transplantation potentially treats patients who suffer from AA and related diseases. 展开更多
关键词 Alopecia areata Umbilical cord-derived mesenchymal stem cells ALLOGENIC Cell therapy Minimal manipulation Case report
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Psoriasis treatment using minimally manipulated umbilical cordderived mesenchymal stem cells:A case report 被引量:4
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作者 Hyunjun Ahn Sang Yeon Lee +2 位作者 Won-Ju Jung Jia Pi Kye-Ho Lee 《World Journal of Clinical Cases》 SCIE 2021年第23期6798-6803,共6页
BACKGROUND Psoriasis is a chronic autoimmune disease that usually manifests as a red scaly epidermis,induration,and hyperproliferation of basal keratinocytes.About 2%of the world’s population suffers from psoriasis b... BACKGROUND Psoriasis is a chronic autoimmune disease that usually manifests as a red scaly epidermis,induration,and hyperproliferation of basal keratinocytes.About 2%of the world’s population suffers from psoriasis but there are no clear therapeutics yet.Recently,mesenchymal stem cells(MSCs)have been regarded as a therapeutic alternative for autoimmune diseases,as they possess immunosuppressive effects without risks.Human umbilical cord-derived MSCs effectively regulate immune cells and are characterized by low immunogenicity,which has many advantages in treating immune diseases.CASE SUMMARY The patient was a 47-year-old male,diagnosed with psoriasis in 1995.He had received various treatments for 25 years,but the psoriatic condition was not significantly improved.He was given three rounds of minimally manipulated umbilical cord-derived MSCs over 2 wk.The erythema gradually disappeared.Three months after the 1st round,all erythema completely disappeared,and the psoriasis did not recur.CONCLUSION Minimally manipulated umbilical cord-derived MSC transplantation can potentially treat patients who suffer from psoriasis. 展开更多
关键词 PSORIASIS Umbilical cord-derived mesenchymal stem cells ALLOGENIC Cell therapy Minimal manipulation Case report
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Treatment of acute ischemic stroke by minimally manipulated umbilical cord-derived mesenchymal stem cells transplantation:A case report 被引量:1
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作者 Hyunjun Ahn Sang Yeon Lee +1 位作者 Won Ju Jung Kye-Ho Lee 《World Journal of Stem Cells》 SCIE 2021年第8期1151-1159,共9页
BACKGROUND Stroke is one of the major causes of disability and death worldwide.Some treatments for stroke exist,but existing treatment methods have limitations such as difficulty in the regeneration of damaged neurona... BACKGROUND Stroke is one of the major causes of disability and death worldwide.Some treatments for stroke exist,but existing treatment methods have limitations such as difficulty in the regeneration of damaged neuronal cells of the brain.Recently,mesenchymal stem cells(MSCs)have been studied as a therapeutic alternative for stroke,and various preclinical and case studies have been reported.CASE SUMMARY A 55-year-old man suffered an acute stroke,causing paralysis in the left upper and lower limbs.He intravenously transplanted the minimally manipulated human umbilical cord-derived MSCs(MM-UC-MSCs)twice with an 8-d interval.At 65 wk after transplantation,the patient returned to his previous occupation as a veterinarian with no adverse reactions.CONCLUSION MM-UC-MSCs transplantation potentially treats patients who suffer from acute ischemic stroke. 展开更多
关键词 Acute ischemic stroke Behavioral disorder Umbilical cord-derived mesenchymal stem cells ALLOGENIC Cell therapy Minimal manipulation Case report
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Laser-manipulated the of a harmonically multiphoton transitions trapped particle
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作者 陈琼 海阔 海文华 《Chinese Physics B》 SCIE EI CAS CSCD 2007年第12期3662-3667,共6页
A single particle magneto-confined in a one-dimensional (1D) quantum wire experiences a harmonic potential, and imposing a sharply focused laser beam on an appropriate site shapes a δ potential. The theoretical inv... A single particle magneto-confined in a one-dimensional (1D) quantum wire experiences a harmonic potential, and imposing a sharply focused laser beam on an appropriate site shapes a δ potential. The theoretical investigation has demonstrated that for a sufficiently strong δ pulse the quantum motional stationary state of the particle is one of the eigenstates of the free harmonic oscillator, and it is determined by the site of the laser beam uniquely, namely a quantum state is admissible if and only if the laser site is one of its nodes. The numerical computation shows that all the nodes of the lower energy states with quantum numbers n ≤ 20, except the coordinate origin, are mutually different. So we can manipulate the multiphoton transitions between the quantum states by adjusting the position of the laser δ pulse and realize the transition from an unknown higher excitation state to a required lower energy state. 展开更多
关键词 quantum wire magnetically trap laser manipulation multiphoton transition
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Multi-material and multi-module freestanding microrobot for cargo transportation 被引量:1
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作者 Jian-Miao Zhang Xin-Yi Wu +5 位作者 Qi Duan Fan-Chun Bin Jie Liu Xian-Zi Dong Feng Jin Mei-Ling Zheng 《International Journal of Extreme Manufacturing》 2026年第1期780-793,共14页
Microrobots play an essential role in early diagnosis and precision medicine with the increasing demands for controllability in bio-medicine and micromanipulation,which can complete the pre-designed behavior under ext... Microrobots play an essential role in early diagnosis and precision medicine with the increasing demands for controllability in bio-medicine and micromanipulation,which can complete the pre-designed behavior under external stimulation.However,most microrobots are currently made of a single material system and focus on fabricating a driving module as the main structure of microrobots.This hinders the integration of diverse functions in one microrobot to fulfill the complex application.Here,a multi-material and multi-module hand-microrobot based on femtosecond laser direct writing technology is proposed,which has a pH-responsive capturing module and a magnetic-responsive transportation module(MRTM).This microrobot can not only respond to pH for capturing and releasing objects,but also respond to magnetic fields for cargo delivery even with obstacles.The two responding modules of the hand-microrobot are fabricated independently,and can collaborate with each other to achieve the delivery of target objects like polystyrene(PS)microsphere(10µm)or 786-O cell by capturing,transporting,and spatial rolling.Besides,the MRTM can be locally fabricated on any prefabricated static structure,so that the whole microrobot can achieve controllable motion.This strategy is expected to be used to manipulate cells,deliver drugs for precise treatment,and environmental treatment. 展开更多
关键词 hand-microrobots MULTI-MODULE manipulation cell transportation femtosecond laser direct writing
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Carrying Forward the Essence of Shi’s Orthopedics and Traumatology,Forging New Paths in Manipulative Medicine-A Chronicle of Professor Zhan Hongsheng’s Team’s Dedicated Work in Spinal Manipulative Medicine
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《Chinese Medicine and Culture》 2026年第1期122-122,F0003,共2页
Professor Zhan Hongsheng(詹红生),as the national representative inheritor of Shanghai Shi’s Orthopedics and Traumatology,has led his team in long-term dedication to the research of Chinese spinal manipulative medicin... Professor Zhan Hongsheng(詹红生),as the national representative inheritor of Shanghai Shi’s Orthopedics and Traumatology,has led his team in long-term dedication to the research of Chinese spinal manipulative medicine.He has achieved outstanding accomplishments in areas such as school inheritance,theoretical construction,technological innovation,standard establishment,scientific research translation,and talent cultivation,thereby advancing the modernization,standardization,and internationalization of Chinese spinal manipulative medicine. 展开更多
关键词 INTERNATIONALIZATION talent cultivationthereby spinal manipulative medicinehe chinese spi spinal manipulative medicine research MODERNIZATION school inheritancetheoretical
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Exploring recent breakthroughs in robotic biomechanical and electrophysiological measurement tools
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作者 Hui-Yao Shi Si Tang +3 位作者 Jia-Lin Shi Peng Yu Chan-Min Su Lian-Qing Liu 《Biomedical Engineering Communications》 2026年第1期35-47,共13页
Single-cell biomechanics and electrophysiology measuring tools have transformed biological research over the last few decades,which enabling a comprehensive and nuanced understanding of cellular behavior and function.... Single-cell biomechanics and electrophysiology measuring tools have transformed biological research over the last few decades,which enabling a comprehensive and nuanced understanding of cellular behavior and function.Despite their high-quality information content,these single-cell measuring techniques suffer from laborious manual processing by highly skilled workers and extremely low throughput(tens of cells per day).Recently,numerous researchers have automated the measurement of cell mechanical and electrical signals through robotic localization and control processes.While these efforts have demonstrated promising progress,critical challenges persist,including human dependency,learning complexity,in-situ measurement,and multidimensional signal acquisition.To identify key limitations and highlight emerging opportunities for innovation,in this review,we comprehensively summarize the key steps of robotic technologies in single-cell biomechanics and electrophysiology.We also discussed the prospects and challenges of robotics and automation in biological research.By bridging gaps between engineering,biology,and data science,this work aims to stimulate interdisciplinary research and accelerate the translation of robotic single-cell technologies into practical applications in the life sciences and medical fields. 展开更多
关键词 BIOMECHANICS ELECTROPHYSIOLOGY micro-nano manipulation automated cell measurement ROBOTICS
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All-flexible self-cleaning hydrogel smart window with multifunctionality based on an electro-thermal manipulator
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作者 Chao Chen Sijia Guo +5 位作者 Long Zhang Bingrui Liu Zhaoxin Lao Shuyi Li Yanlei Hu Dong Wu 《International Journal of Extreme Manufacturing》 2026年第1期669-684,共16页
Smart windows that can repel diverse liquids are highly attractive for the development of self-cleaning building system.Despite immense achievements having been made in drophobic smart windows,unfortunately,the limita... Smart windows that can repel diverse liquids are highly attractive for the development of self-cleaning building system.Despite immense achievements having been made in drophobic smart windows,unfortunately,the limitations of inferior transparency,unsatisfactory flexibility,and scarce functionality greatly hinder their practical applications.Here,a multifunctional,all-flexible and slef-cleaning electrothermal-actuated(SETA)module with superior transparency is developed by sandwiching the hydrophobic SiO_(2) nanoparticles decorated silver nanowires thin-film heater and the thermo-responsive hydrogel.Through loading/discharging an electric stimulus of 5 V,the optical visibility of SETA could be in situ switched between an opaque state(T_(550)=11.0%)and a transparent state(T_(550)=84.9%)relying on the dynamically collapsed and swollen transition of hydrogel on planar and three-dimensional curved surfaces.Moreover,SETA chipset is able to repel diverse liquids,including organic and inorganic species,showcasing an excellent self-cleaning capability.Lastly,all-in-one multifunctionalities,including pixelated display,thermal regulation,defogging,and self-cleaning on a single SETA chipset,are successfully deployed.Compared to the previous windows,the current SETA chipset is more competent for optical switching in reality,owing to its portable,energy-efficient,flexible,highly-transparent,and on-demand manipulating advantages.This work provides inspirations for self-cleaning greenhouse,tunable optics,intelligent vehicles,and so on. 展开更多
关键词 femtosecond laser hydrophobic surface stimulus-responsive manipulator SELF-CLEANING switchable clarity
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Vortex-Induced Vibration Characteristics of an Underwater Manipulator in Pulsating Flow
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作者 Yongqi Li Xia Liu +3 位作者 Zongqiang Li Derong Duan Senliang Dai Hui Zhang 《哈尔滨工程大学学报(英文版)》 2026年第1期63-81,共19页
Vortex-induced vibration(VIV)of an underwater manipulator in pulsating flow presents a notable engineering problem in precise control due to the velocity variation in the flow.This study investigates the VIV response ... Vortex-induced vibration(VIV)of an underwater manipulator in pulsating flow presents a notable engineering problem in precise control due to the velocity variation in the flow.This study investigates the VIV response of an underwater manipulator subjected to pulsating flow,focusing on how different postures affect the behavior of the system.The effects of pulsating parameters and manipulator arrangement on the hydrodynamic coefficient,vibration response,motion trajectory,and vortex shedding behaviors were analyzed.Results indicated that the cross flow vibration displacement in pulsating flow increased by 32.14%compared to uniform flow,inducing a shift in the motion trajectory from a crescent shape to a sideward vase shape.In the absence of interference between the upper and lower arms,the lift coefficient of the manipulator substantially increased with rising pulsating frequency,reaching a maximum increment of 67.0%.This increase in the lift coefficient led to a 67.05%rise in the vibration frequency of the manipulator in the in-line direction.As the pulsating amplitude increased,the drag coefficient of the underwater manipulator rose by 36.79%,but the vibration frequency in the cross-flow direction decreased by 56.26%.Additionally,when the upper and lower arms remained in a state of mutual interference,the cross-flow vibration amplitudes of the upper and lower arms were approximately 1.84 and 4.82 times higher in a circular-elliptical arrangement compared to an elliptical-circular arrangement,respectively.Consequently,the flow field shifted from a P+S pattern to a disordered pattern,disrupting the regularity of the motion trajectory. 展开更多
关键词 Underwater manipulator Pulsating flow Vortex-induced vibration TRAJECTORY Overlapping mesh method
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A Decade of Soft Robotic Manipulators:Advances in Design,Modeling,Control,and Emerging Challenges
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作者 Elsayed Atif Aner Omar M.Shehata +1 位作者 Mohammed Ibrahim Awad Nancy E.ElHady 《Journal of Bionic Engineering》 2026年第1期55-98,共44页
Soft robotic manipulators represent a rapidly evolving field characterized by inherent compliance,adaptability,and safe interactions within unstructured environments.Over the past decade(2015-2025),significant advance... Soft robotic manipulators represent a rapidly evolving field characterized by inherent compliance,adaptability,and safe interactions within unstructured environments.Over the past decade(2015-2025),significant advancements have trans-formed their capabilities through novel designs inspired by biological systems,advanced modeling frameworks,sophisti-cated control strategies,and integration into diverse real-world applications.Recent innovations in multifunctional mate-rials and emerging actuation technologies have markedly expanded manipulator performance,reliability,and dexterity.Concurrently,developments in modeling have progressed from simplified geometric methods toward highly accurate physics-based and hybrid data-driven approaches,substantially improving real-time prediction and controllability.Coupled with these developments,adaptive and robust control strategies-including learning-based techniques-have enabled unprec-edented autonomy and precision in challenging application domains such as Minimally Invasive Surgery(MIS),precision agriculture,deep-sea exploration,disaster recovery,and space missions.Despite these remarkable strides,key challenges remain,notably regarding scalability,long-term material durability,robust integrated sensing,and standardized evaluation procedures.This review comprehensively synthesizes recent advances,critically evaluates state-of-the-art methodologies,and systematically identifies existing gaps to provide a clear roadmap and targeted research directions,guiding future developments toward the broader adoption and optimal utilization of soft robotic manipulators. 展开更多
关键词 Soft robotics Continuum manipulators Compliant actuation Smart functional materials Modeling and control Bio-inspired design
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Droplet acoustofluidics:From acoustic principles to micro manipulations
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作者 Xianwu Ke Xiaotian Shen +1 位作者 Tiechuan Li Xuexin Duan 《Nanotechnology and Precision Engineering》 2026年第1期87-111,共25页
Droplet-based microfluidics have drawn much attention in recent years and have been successfully applied in biochemical analysis,material synthesis,and biomedical engineering.Precise and flexible manipulations of drop... Droplet-based microfluidics have drawn much attention in recent years and have been successfully applied in biochemical analysis,material synthesis,and biomedical engineering.Precise and flexible manipulations of droplets are the basis of various applications.Numerous techniques have been introduced to achieve on-demand control of droplets,including electric,magnetic,acoustic,optical,and thermal methods.Among these,the combination of acoustics and microfluidics(termed acoustofluidics)has shown great potential and advantages in droplet manipulation as it is non-invasive,high-precision,low-cost,easily integrated,and biocompatible.Here,we summarize recent works on acoustofluidic manipulations of droplet-based microfluidics.This paper is structured into three main sections.First,the commonly used acoustic devices in acoustofluidics and their working principles are introduced.Such acoustic devices include interdigital transducers,Lamb wave resonators,and bulk acoustic resonators,and generate acoustic waves with frequencies ranging from kilohertz to gigahertz.Second,the forces and effects involved in droplet manipulations using acoustofluidics are analyzed.Third,the manipulation processes of droplet microfluidics using various acoustofluidic techniques are summarized and compared with other methods,including droplet generation,mixing,splitting,fusion,sorting,transportation,and internal particle patterning.Finally,current challenges and future prospects for acoustofluidic manipulation techniques for droplet-based microfluidics are discussed. 展开更多
关键词 Droplet manipulations Acoustofluidics Droplet microfluidics
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Driving manipulation analysis and control reconfiguration of heavy-haul trains
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作者 LI Zi-yi ZHOU Yan-li +2 位作者 YANG Hui YU Yong-sheng LI Guang-wei 《Journal of Central South University》 2026年第1期506-522,共17页
The safe driving and operation of trains is a necessary condition for ensuring the safe operation of trains.In particular,heavy-haul trains are characterized by the difficulty in driving and operation.Considering the ... The safe driving and operation of trains is a necessary condition for ensuring the safe operation of trains.In particular,heavy-haul trains are characterized by the difficulty in driving and operation.Considering the uncertainties in train driving and operation,this paper analyzes the relationship between the safety of heavy-haul electric locomotive hauled trains and driving and operation.It studies the auxiliary intelligent driving safety operation control methods.Through K-means to identify the characteristics of drivers'driving manipulation,the hidden Markov model adaptively adjusts the train driving and operation sequence,and conducts auxiliary driving reconstruction for heavy-haul locomotive driving and operation.Based on the train running curve and the locomotive traction/braking characteristics,it smoothly controls the exertion of the traction/braking force of heavy-haul locomotives,thereby optimizing the driving safety control of heavy-haul trains in the vehicle-environment-track system.Finally,the train operation simulation and optimized driving verification are carried out by simulating some track sections.The results show that the proposed method can correct and pre-optimize driving operations,improving the smoothness of heavy-haul trains by approximately 10%.It verifies the effectiveness of the proposed train assisted driving control reconstruction method,facilitating the smooth and safe operation of heavy-haul trains. 展开更多
关键词 heavy-haul trains driving manipulation K-means clustering algorithm hidden Markov model control reconfiguration
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Octopus-Inspired Self-Adaptive Hydrogel Gripper Capable of Manipulating Ultra-Soft Objects
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作者 Yixian Wang Desheng Liu +9 位作者 Danli Hu Chao Wang Zonggang Li Jiayu Wu Pan Jiang Xingxing Yang Changcheng Bai Zhongying Ji Xin Jia Xiaolong Wang 《Nano-Micro Letters》 2026年第1期896-913,共18页
Octopuses,due to their flexible arms,marvelous adaptability,and powerful suckers,are able to effortlessly grasp and disengage various objects in the marine surrounding without causing devastation.However,manipulating ... Octopuses,due to their flexible arms,marvelous adaptability,and powerful suckers,are able to effortlessly grasp and disengage various objects in the marine surrounding without causing devastation.However,manipulating delicate objects such as soft and fragile foods underwater require gentle contact and stable adhesion,which poses a serious challenge to now available soft grippers.Inspired by the sucker infundibulum structure and flexible tentacles of octopus,herein we developed a hydraulically actuated hydrogel soft gripper with adaptive maneuverability by coupling multiple hydrogen bond-mediated supramolecular hydrogels and vat polymerization three-dimensional printing,in which hydrogel bionic sucker is composed of a tunable curvature membrane,a negative pressure cavity,and a pneumatic chamber.The design of the sucker structure with the alterable curvature membrane is conducive to realize the reliable and gentle switchable adhesion of the hydrogel soft gripper.As a proof-of-concept,the adaptive hydrogel soft gripper is capable of implement diversified underwater tasks,including gingerly grasping fragile foods like egg yolks and tofu,as well as underwater robots and vehicles that station-keeping and crawling based on switchable adhesion.This study therefore provides a transformative strategy for the design of novel soft grippers that will render promising utilities for underwater exploration soft robotics. 展开更多
关键词 Octopus sucker structure Self-adaptive gripper Supramolecular hydrogel Underwater switchable attachment Nondestructive manipulating
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Actor–Critic Trajectory Controller with Optimal Design for Nonlinear Robotic Systems
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作者 Nien-Tsu Hu Hsiang-Tung Kao +1 位作者 Chin-Sheng Chen Shih-Hao Chang 《Computers, Materials & Continua》 2026年第4期1996-2021,共26页
Trajectory tracking for nonlinear robotic systems remains a fundamental yet challenging problem in control engineering,particularly when both precision and efficiency must be ensured.Conventional control methods are o... Trajectory tracking for nonlinear robotic systems remains a fundamental yet challenging problem in control engineering,particularly when both precision and efficiency must be ensured.Conventional control methods are often effective for stabilization but may not directly optimize long-term performance.To address this limitation,this study develops an integrated framework that combines optimal control principles with reinforcement learning for a single-link robotic manipulator.The proposed scheme adopts an actor–critic structure,where the critic network approximates the value function associated with the Hamilton–Jacobi–Bellman equation,and the actor network generates near-optimal control signals in real time.This dual adaptation enables the controller to refine its policy online without explicit system knowledge.Stability of the closed-loop system is analyzed through Lyapunov theory,ensuring boundedness of the tracking error.Numerical simulations on the single-link manipulator demonstrate that themethod achieves accurate trajectory followingwhile maintaining lowcontrol effort.The results further showthat the actor–critic learning mechanism accelerates convergence of the control policy compared with conventional optimization-based strategies.This work highlights the potential of reinforcement learning integrated with optimal control for robotic manipulators and provides a foundation for future extensions to more complex multi-degree-of-freedom systems.The proposed controller is further validated in a physics-based virtual Gazebo environment,demonstrating stable adaptation and real-time feasibility. 展开更多
关键词 Reinforcement learning optimal control actor–critic algorithm trajectory tracking nonlinear systems robotic manipulator
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Multilevel Military Image Encryption Based on Tri-Independent Keying Approach
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作者 Shereen S.Jumaa Mohsin H.Challoob Amjad J.Humaidi 《Computers, Materials & Continua》 2026年第4期1548-1564,共17页
Military image encryption plays a vital role in ensuring the secure transmission of sensitive visual information from unauthorized access.This paper proposes a new Tri-independent keying method for encrypting military... Military image encryption plays a vital role in ensuring the secure transmission of sensitive visual information from unauthorized access.This paper proposes a new Tri-independent keying method for encrypting military images.The proposed encryption method is based on multilevel security stages of pixel-level scrambling,bitlevel manipulation,and block-level shuffling operations.For having a vast key space,the input password is hashed by the Secure Hash Algorithm 256-bit(SHA-256)for generating independently deterministic keys used in the multilevel stages.A piecewise pixel-level scrambling function is introduced to perform a dual flipping process controlled with an adaptive key for obscuring the spatial relationships between the adjacent pixels.Adynamicmasking scheme is presented for conducting a bit-level manipulation based on distinct keys that change over image regions,providing completely different encryption results on identical regions.To handle the global correlation between large-scale patterns,a chaotic index-map system is employed for shuffling image regions randomly across the image domain based on a logistic map seeded with a private key.Experimental results on a dataset of military images show the effectiveness of the proposed encryption method in producing excellent quantitative and qualitative results.The proposed method obtains uniform histogram distributions,high entropy values around the ideal(≈8 bits),Number of Pixel Change Rate(NPCR)values above 99.5%,and low Peak Signal-to-Noise Ratio(PSNR)over all encrypted images.This validates the robustness of the proposed method against cryptanalytic attacks,verifying its ability to serve as a practical basis for secure image transmission in defense systems. 展开更多
关键词 Military image encryption pixel-level scrambling bit-level manipulation block-level shuffling password hashing dynamic encryption key spatial pixel correlation chaotic system
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Universal parity and duality asymmetries-based optical force/torque framework
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作者 Xu Yuan Xiaoshu Zhao +5 位作者 Jiquan Wen Hongxia Zheng Xiao Li Huajin Chen Jack Ng Zhifang Lin 《Advanced Photonics Nexus》 2026年第1期122-130,共9页
Understanding the complex interplay between structured light and particles is crucial for unlocking advanced optical manipulation techniques.However,existing theories for optical force/torque are often limited to smal... Understanding the complex interplay between structured light and particles is crucial for unlocking advanced optical manipulation techniques.However,existing theories for optical force/torque are often limited to small particles within the dipole regime or specific light fields,thereby lacking universality and sometimes leading to ambiguity.To overcome these limitations,we establish a fully analytical and comprehensive framework for optical force/torque based on the Cartesian multipole expansion theory,which is applicable to arbitrary-sized bi-isotropic(chiral)spherical particles immersed in arbitrary monochromatic optical fields.Rigorous expressions are thus derived,which explicitly bridge the optical force/torque with particle-propertydependent coefficients and“force/torque source”quantities characterizing the incident light structures.Such quantities identify the ultimate physical origins of optical force/torque and are systematically classified into four categories based on their parity(P)and duality(D)symmetries.Each category interacts selectively with particles exhibiting specific P and D(a)symmetries,thus inducing distinct optical forces or torques with characteristic physical behaviors.This classification establishes the mutual symmetry-breaking criteria necessary for both particles and light beams to generate optical force/torque,offering a physics-based roadmap for engineering optical manipulations such as chirality sorting,light-driven micromotors,and beyond. 展开更多
关键词 OPTOMECHANICS optical manipulation optical force/torque parity and duality symmetries
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Effect of Mn-ion reconstructed lattice on lead-free halide perovskite Cs_(3)Bi_(2-X)Mn_(x)Cl_(9) Anode in Li-ion batteries
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作者 Wei Jia Jianxun Bao +4 位作者 Hebi Zhang Min Wu Jianbei Qiu Hao Wu Yingjie Zhang 《Journal of Environmental Sciences》 2026年第1期154-165,共12页
Halide perovskite materials have received considerable attention for solar cells,LEDs,lasers etc.owing to their controllable physicochemical properties and structural advantages.However,little research has focused on ... Halide perovskite materials have received considerable attention for solar cells,LEDs,lasers etc.owing to their controllable physicochemical properties and structural advantages.However,little research has focused on energy storage and conversion applications,such as use as anodes in lithium-ion batteries.In this paper,all-inorganic lead-free halide perovskite Cs_(3)Bi_(2)Cl_(9)powders were synthesized by the grinding method,and the lattice was successfully adjusted via introducing Mn^(2+).The characterization results show that Mn-ion substitution can cause local lattice distortion to restructure the lattice,which will cause a mixed arrangement of[BiCl_(6)]octahedra to improve the performance of the anode material.This new material can provide a feasible solution for solving the problem of low specific capacity anode materials caused by unstable crystal structures,and also indicates that such perovskites with unique crystal structures and lattice tunability have broad application prospects in lithium-ion batteries. 展开更多
关键词 Halide Perovskites Mn^(2+)substituting Lattice manipulation Lithium-ion battery anode
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Dynamic modeling and analysis of an in-space cable-driven manipulator for on-orbit servicing
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作者 Yiya WANG Bo ZHANG Minghe SHAN 《Chinese Journal of Aeronautics》 2026年第2期609-625,共17页
In-space cable-driven manipulators exhibit several advantages,such as a large range of motion,high dexterity,and lightweight structure.However,kinematic and dynamic analysis play an essential role in designing a cable... In-space cable-driven manipulators exhibit several advantages,such as a large range of motion,high dexterity,and lightweight structure.However,kinematic and dynamic analysis play an essential role in designing a cable-driven manipulator.In this paper,the kinematic analysis of a type of cable-driven manipulator is performed,and a motion planning scheme is conducted to actuate this manipulator.Moreover,a flexible multi-body dynamic model of a cable-driven manipulator considering the frictional contact between the cables and pulleys is established.To describe properties such as flexibility,vibration,and variable length of the cable,this paper utilizes reducedorder beam elements of the Absolute Nodal Coordinates Formulation(ANCF)in Arbitrary Lagrangian Eulerian(ALE)framework.Additionally,a virtual element is introduced to model the contact segment in the cable-pulley system.A tension decay factor is employed to account for the friction in the contact segment.To validate the proposed method,a semi-analytical model based on D'Alembert's principle is established.Cross-verification is performed to validate the accuracy of both models.The model is further applied to simulate the rotation of the cable-driven manipulator with different structural parameters and frictional factors.The results from the analyses provide valuable guidance for the design and motion control of the in-space cable-driven manipulator.Finally,a prototype of a single module is manufactured and tested.Ground experiments are carried out to verify the kinematic and dynamic models. 展开更多
关键词 Cable-driven manipulator Dynamic models Cable-pulley system Arbitrary Lagrangian Eulerian(ALE)formulation Frictional contact modeling
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