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Innovative strategies and perspectives for enhancing photoelectrochemical water splitting:Physical field engineering 认领 引用
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作者 Wenfeng Li Guocheng Lv +6 位作者 Meng Liu Fanyue Zhao Zetian He Guihong Li Wenping Wang Libing Liao Daimei Chen 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 2026年第2期9-36,共28页
Photoelectrochemical(PEC)water splitting efficiently produces chemical fuels,yet persistent efficiency bottlenecks impede widespread deployment despite documented advances.In recent years,the introduction of external ... Photoelectrochemical(PEC)water splitting efficiently produces chemical fuels,yet persistent efficiency bottlenecks impede widespread deployment despite documented advances.In recent years,the introduction of external physical fields has emerged as a promising technique to remarkably improve the PEC performances of semiconductors both internally and externally.This review presents an in-depth exploration of the mechanisms underlying the utilization of thermal field(photothermal,pyroelectric effect),piezoelectric field(strain piezoelectricity,ferroelectric polarization),magnetic field(negative magnetoresistive effect,lorentz forces,spin polarization),and coupled fields in enhancing the synergistic effects of PEC water splitting,and subsequently analyzes their influence on the performance of PEC systems.It particularly emphasizes the underlying mechanisms that facilitate the strengthening of external fields on the excitation,transfer,and separation of carriers,as well as the enhancement of surface reactions.Additionally,we delve into the expansive prospects of externally assisted PEC water splitting,examining both its fundamental research implications and practical applications.Finally,we discuss the challenges encountered in its development and offer insights into potential future directions. 展开更多
关键词 Photoelectrochemical water splitting Thermal field Magnetic field Piezoelectric field Multiphysics field
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An innovative multi-energy field-assisted ultra-precision machining technology:in-situ laser-magnetic dual-field assisted diamond cutting 认领 引用 被引量：1
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作者 Yintian Xing Yue Liu +8 位作者 Changlin Liu Yuhan Li Tengfei Yin Sen Yin Zhanwen Sun Zhiwei Zhu Changxi Xue Wai Sze Yip Suet To 《International Journal of Extreme Manufacturing》 SCIE EI CAS CSCD 2026年第2期710-741,共32页
Field-assisted diamond cutting technology is a significant machining method that utilizes external energy fields to enhance the manufacturing performance.However,aimed the emergence of advanced high-performance materi... Field-assisted diamond cutting technology is a significant machining method that utilizes external energy fields to enhance the manufacturing performance.However,aimed the emergence of advanced high-performance materials,traditional single-field-assisted machining struggles to meet stringent precision requirements.Therefore,this study introduces an innovative and unique multi-energy field-assisted ultra-precision machining technology,in-situ laser-magnetic dual-field assisted diamond cutting(LMDFDC),to transcend the limitations of conventional single-field-assisted cutting methods and advance the machinability of challenging materials,notably the multi-principal-element high-entropy alloy(HEA).To elucidate the fundamental science questions of“what occurs,what changes,and what improves”in this work,the phenomenological behaviors of the dual-field coupling interaction are systematically investigated through advanced characterization techniques,spanning macroscopic surface integrity to microscopic atomic arrangement.This comprehensive study encompasses integrated analyses of four machining techniques for HEA workpiece,namely dual-energy field,two single-energy fields,and no-energy field.The research results indicate that the dual-field coupling effect demonstrates a leap in manufacturing performance through thermo-magneto-mechanical multi-physical synergistic interactions,primarily manifested in improved surface quality,reduced subsurface damage,suppressed diamond tool wear,and enhanced material removal stability.The significance of in-situ LMDFDC technology resides in propelling frontier academic developments in multi-physics coupled manufacturing theories while uncovering innovative machining approaches for next-generation high-performance materials. 展开更多
关键词 multi-energy field-assisted machining technology ultraprecision diamond cutting technology laser field magnetic field high-entropy alloy
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Integrating wind field analysis in UAV path planning:Enhancing safety and energy efficiency for urban logistics 认领 引用 被引量：3
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作者 Ruijia GU Yifei ZHAO Xinhui REN 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2026年第1期508-533,共26页
Shenzhen,a major city in southern China,has experienced rapid advancements in Unmanned Aerial Vehicle(UAV)technology,resulting in extensive logistics networks with thousands of daily flights.However,frequent disruptio... Shenzhen,a major city in southern China,has experienced rapid advancements in Unmanned Aerial Vehicle(UAV)technology,resulting in extensive logistics networks with thousands of daily flights.However,frequent disruptions due to its subtropical monsoon climate,including typhoons and gusty winds,present ongoing challenges.Despite the growing focus on operational costs and third-party risks,research on low-altitude urban wind fields remains scarce.This study addresses this gap by integrating wind field analysis into UAV path planning,introducing key innovations to the classical model.First,UAV wind resistance and turbulence constraints are analyzed,mapping high-wind-speed and turbulence-prone zones in the airspace.Second,wind dynamics are incorporated into path planning by considering airspeed and groundspeed variation,optimizing waypoint selection and flight speed adjustments to improve overall energy efficiency.Additionally,a wind-aware Theta*algorithm is proposed,leveraging wind vectors to expedite search process,while Computational Fluid Dynamics(CFD)techniques are employed to calculate wind fields.A case study of Shenzhen,examining wind patterns over the past decade,demonstrates a 6.23%improvement in groundspeed and a 7.69%reduction in energy consumption compared to wind-agnostic models.This framework advances UAV logistics by enhancing route safety and energy efficiency,contributing to more cost-effective operations. 展开更多
关键词 Drone logistics Energy consumption Hazardous field region Path planning Unmanned aerial vehicle(UAV) Urban wind fields
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Prospects and applications of efficient physical fields in enhancing quality stability of berries during processing:a review 认领 引用
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作者 Chunting Qu Yuxi Lang +8 位作者 Hui Tan Yao Ma Xinwei Wang Honglin Jiang Maofan Yue Ziqi Song Ahmed Adel Ashour Bin Li Xu Si 《Food Innovation and Advances》 2026年第2期195-206,共12页
Berries are characterized by their high nutrient content and the presence of bioactive compounds.However,their thin skin and high moisture content render them highly susceptible to postharvest spoilage.Conventional pr... Berries are characterized by their high nutrient content and the presence of bioactive compounds.However,their thin skin and high moisture content render them highly susceptible to postharvest spoilage.Conventional processing methods can extend shelf life to a certain degree;however,they frequently result in nutrient loss,sensory quality deterioration,and increased energy consumption.In recent years,high-efficiency physical field technologies(such as acoustic field,electromagnetic fields,pressure field,and plasma)have provided new technological pathways for addressing the aforementioned challenges.The utilization of non-thermal or low-temperature processing characteristics enables the effective preservation of berry nutrients and flavor during critical stages,such as sterilization,drying,freezing,thawing,and refrigeration.Furthermore,these physical fields enhance processing efficiency,reduce energy consumption,and delay the deterioration of quality during storage.This paper systematically reviews the research progress in various physical fields of berry processing and quality enhancement,summarizing their fundamental concepts,mechanisms of action,and effects on berry quality across different processing stages,and discusses their prospects for industrial application in the food processing industry. 展开更多
关键词 physical field technologies such bioactive compoundshowevertheir postharvest spoilage acoustic fieldelectromagnetic fieldspressure berry processing processing methods efficient physical fields bioactive compounds
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Observation of Gauge Field-Induced Non-Hermitian Helical Skin Effects 认领 引用
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作者 Yu-Hong Han Yi Li +5 位作者 Jia-Hui Zhang Yang Kou Liantuan Xiao Suotang Jia Linhu Li Feng Mei 《Chinese Physics Letters》 SCIE EI CAS CSCD 2026年第4期185-215,共31页
Synthetic gauge fields and non-Hermitian skin effects are central to topological phases and non-Hermitian physics,and each has recently attracted considerable interest across diverse research areas.Realizing skin effe... Synthetic gauge fields and non-Hermitian skin effects are central to topological phases and non-Hermitian physics,and each has recently attracted considerable interest across diverse research areas.Realizing skin effects typically requires asymmetric coupling or on-site gain and loss.Here,we theoretically and experimentally show that,under gauge fields,symmetry dissipative couplings can generate a nonreciprocal skin effect with a pseudospin degree of freedom and helical transport,which we term the“helical pseudospin skin effect”. 展开更多
关键词 non Hermitian physics pseudospin degree freedom asymmetric coupling helical transportwhich synthetic gauge fields skin effects gauge fields dissipative couplings
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Revision Scheme of Atmospheric Electric Field Measurements Considering the Corona Effect 认领 引用
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作者 GUO Xiu-feng WANG Zhao-xia +9 位作者 FENG Jian-wei SHAN Yong-tao ZHANG He ZHANG Ling ZHAO Nian GAO Yue ZHAO Yu-bin ZHENG Yu-hang HUANG Ke-yang GUAN Peng-qi 《Journal of Tropical Meteorology》 SCIE CAS CSCD 2026年第3期302-314,共13页
Research on atmospheric electric field distortion factors is crucial for enhancing the accuracy of lightning monitoring and warnings.In this study,two mill installation cases were established.Based on an established t... Research on atmospheric electric field distortion factors is crucial for enhancing the accuracy of lightning monitoring and warnings.In this study,two mill installation cases were established.Based on an established threedimensional corona discharge model,the impact of corona discharge of the lightning rod on the ground atmospheric electric field(E)was investigated by comparing two situations,with and without corona,while considering the influence of wind.In the absence of wind,State 1 represented the condition with corona,whereas State 2 represented the condition without corona.In State 1,the measurement results of E were not affected by the rod.Conversely,in State 2,the corona discharge of the rod caused a distortion of E;the lower the height of the rod,the higher the degree of distortion caused by the corona on E.When wind was considered,the position of the mill affected the distortion of E.The distortion coefficient was ki(i=3,4,5)and ki<1.Specifically,k3 was the distortion coefficient when the mill was installed in the windward area,k4 when it was installed in the leeward area,and k5 when it was installed in the sidewind area.The smaller ki,the greater the shielding effect.The highest shielding effect was exhibited by exhibited,followed by k5 and k4.The leeward installation yielded the greatest shielding effect,whereas the windward installation offered the lowest shielding effect.When the same case was considered,the greater the wind speed,the more the corona charge of the tip was released,and the stronger the shielding effect on E.When two different cases were adopted,the relationship between the wind speed(v)and the revision coefficient(p)was fitted.The values of p and v exhibited an exponential functional relationship. 展开更多
关键词 atmospheric electric field independent lightning rod electric field distortion corona discharge revision coefficient
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Ship Magnetic Field Modeling and Extrapolation Based on a Convolutional Neural Network 认领 引用
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作者 Ao Zhou Yadong Zhang +3 位作者 Wentie Yang Zuoshuai Wang Jianxun Wang Zhiwei Chen 《哈尔滨工程大学学报（英文版）》 CSCD 2026年第2期536-549,共14页
Accurate modeling of ship magnetic fields is important for predicting their spatial distribution to improve the magnetic stealth effect of ships.This study proposes an extrapolation model for ship magnetic fields base... Accurate modeling of ship magnetic fields is important for predicting their spatial distribution to improve the magnetic stealth effect of ships.This study proposes an extrapolation model for ship magnetic fields based on genetic algorithms and convolutional neural networks(CNNs).The magnetic probe position matrix of the traditional equivalent source is utilized as input,and the three-directional components of the magnetic field measured by the probes are employed as output.The extrapolation model for ship magnetic fields is obtained through iterative training and fitting with CNNs.Variables such as the number of magnetic dipoles,the distance between magnetic dipoles,the size and quantity of convolutional kernels,batch size,learning rate,and L2 regularization coefficient are optimized to boost the accuracy of the extrapolation model for magnetic fields.The fitting accuracy of the extrapolation model for ship magnetic fields is used as the optimization objective.Based on a finite element simulation model of ship magnetic fields,the accuracy and robustness of the CNN algorithm under different magnetic field conditions are validated using the known standard depth plane,the unknown depth at 1.125 times the standard depth plane,and the unknown depth at 1.25 times the standard depth plane.Results show that,after optimization,the fitting error for the magnetic field extrapolation model based on CNN is 1.50%for the standard depth plane,1.63%for the unknown depth at 1.125 times the standard depth plane,and 2.36%for the unknown depth at 1.25 times the standard depth plane.The error remains below 5%under varying magnetic field conditions.When a random measurement error of 0%-5%is introduced for the magnetic probes,the prediction error at 1.25 times the standard depth plane is 2.30%;with a random error of 0%-10%,the prediction error is 4.95%.This approach significantly improves the accuracy and robustness of magnetic field extrapolation,which makes it an effective and feasible method for ship magnetic field modeling. 展开更多
关键词 Shipboard magnetic field Convolutional neural network Genetic algorithm Equivalent source method Magnetic field extrapolation
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Concept,technology generation classification and field practices of enhanced gas recovery 认领 引用
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作者 WEI Yunsheng YAN Haijun +7 位作者 GUO Jianlin WANG Junlei TANG Haifa GUO Zhi QI Yadong ZHU Hanqing WANG Zhongnan GAO Yanling 《Petroleum Exploration and Development》 SCIE 2026年第2期473-488,共16页
Starting from the first principle thinking,this study systematically reviews the development mechanisms of gas reservoirs and proposes the development concept of“full life cycle enhanced gas recovery(EGR)”.Following... Starting from the first principle thinking,this study systematically reviews the development mechanisms of gas reservoirs and proposes the development concept of“full life cycle enhanced gas recovery(EGR)”.Following the principles of scientificity,practicality and comparability,a generational classification system for EGR technologies is established.The research indicates that the properties of natural gas dictate a development mechanism primarily driven by pressure depletion to release the elastic expansion energy of gas.This leads to a development model centered on primary depletion,supplemented by limited adjustments in late stages.Early development essentially lies in well pattern optimization and risk pre-control,while late development focuses on targeted local adjustments and integrated collaborative control.Primary gas recovery,relying on natural energy depletion,achieves a recovery factor of 25%–55%.Secondary gas recovery,through active regulation of the reservoir pressure field via techniques like blockage removal,and injection-production optimization,can enhance the recovery factor by 10–15 percentage points.Tertiary gas recovery,employing multiple mechanisms to alter the reservoir's physical and chemical fields synergistically,offers a potential further increase of 5–10 percentage points.Currently,primary recovery technologies are mature and well-established.Synergistic optimization of well patterns and fracture networks enables effective production from gas-drive reservoirs,while optimized development strategies facilitate orderly production from water-drive gas reservoirs.Secondary recovery technologies,in the field pilot stage currently,adopt active measures like enhanced water drainage,water shutoff,and gas injection to effectively control water influx and release trapped gas.Tertiary recovery remains largely in the laboratory or pilot test stage.Future efforts should focus on cross-generational technologies,such as“primary+secondary”and“primary+tertiary”combinations,to continuously improve recovery factors throughout the full lifecycle of gas reservoirs. 展开更多
关键词 natural gas reservoir enhanced gas recovery technology generation classification depletion development pressure field regulation physical and chemical field regulation multi-mechanism synergy
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Pixelated liquid crystal programmable metasurface enabled multi-functional terahertz near-field wavefront manipulation 认领 引用
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作者 YUAN FU XIAOJIAN FU +4 位作者 LIFENG CHEN PENG WANG LIHAO HUANG JUN YANG TIE JUN CUI 《Photonics Research》 SCIE EI CAS CSCD 2026年第5期2068-2079,共12页
Reconfigurable intelligent surface(RIS)technology is believed to effectively solve the dilemma of terahertz wireless communication in non-line-of-sight scenarios.Notably,the deployment of large-scale RIS arrays at hig... Reconfigurable intelligent surface(RIS)technology is believed to effectively solve the dilemma of terahertz wireless communication in non-line-of-sight scenarios.Notably,the deployment of large-scale RIS arrays at high frequencies brings about significant near-field effects,resulting in extensive near-field areas,which provides the possibility for the application of near-field communication.In this paper,a pixelated liquid crystal program-mable metasurface(PLCPM)is proposed to effectively manipulate terahertz waves in the near-field region.Leveraging the tunability of liquid crystal(LC)materials,the proposed PLCPM achieves 1-bit phase coding capability within the 104-110 GHz frequency band. 展开更多
关键词 multi functional terahertz near field wavefront manipulation manipulate terahertz terahertz wireless communication reconfigurable intelligent surface pixelated liquid crystal programmable metasurface non line sight scenarios near field communication reconfigurable intelligent surface ris technology
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Proposed Nanoscale Spin Field-Effect Transistors with 2D Ferroelectric Rashba Semiconductors 认领 引用
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作者 Jing Chen Mengshuo Kang +5 位作者 Qiwei Hu Pan Gao Tongwei Li Liangyu Wang Weiwei Ju Wei Hu 《Chinese Journal of Chemical Physics》 SCIE EI CAS CSCD 2026年第3期377-389,I0049-I0055,共13页
The spin field-effect transistor(SFET)based on ferroelectric Rashba semiconductor(FRS)has a shorter channel length than ordinary transistors,making it an important type of future transistor.Through high-throughput inv... The spin field-effect transistor(SFET)based on ferroelectric Rashba semiconductor(FRS)has a shorter channel length than ordinary transistors,making it an important type of future transistor.Through high-throughput inverse design,AlBi and SiPb monolayers are considered to be very promising FRSs due to their prominent Rashba effect,the thinnest atomic structure,and surmountable energy barriers.Herein,we employ first-principles calculations to systematically investigate the modulation of Rashba effect,electric field response,and ferroelectricity in AlBi and SiPb monolayers.The large Rashba coefficients of 2.717 and 2.606 eV·Åare obtained for AlBi and SiPb monolayers,while they can be efficiently modulated by the external electric field and strain engineering.The electric field response of AlBi oscillates around 0.5 e·Å2and that of SiPb can reach 0.78 e·Å2,which can fully meet the requirements of practical applications.Furthermore,as typical two-dimensional ferroelectric materials,the coupling effect between ferroelectric polarization and spin polarization is also explored.Based on these investigations,we design two types of SFET with AlBi or SiPb monolayer as the channel.The SFET designed solely based on the electric field response without considering the ferroelectricity,has a channel length ranging from 70 nm to 100 nm.The SFET designed based on the ferroelectricity can reduce the channel length to below 2 nm,which is quite below the tolerance of coherent transport in semiconductors.Thus,two-dimensional(2D)FRS can be considered as a promising candidate material for the next generation of SFETs. 展开更多
关键词 Rashba effect Ferroelectricity Spin field-effect transistor Electric field re-sponse AlBi and SiPb monolayers
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Large-scale distortion of the dayside magnetopause under radial interplanetary magnetic field 认领 引用
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作者 Jin Guo San Lu +7 位作者 Quanming Lu Boyi Wang Shimou Wang Junyi Ren Jiuqi Ma Xinliang Gao Rajkumar Hajra Rongsheng Wang 《Science Bulletin》 SCIE EI CAS CSCD 2026年第12期2977-2981,共5页
The solar wind,a continuous stream of charged particles emitted from the Sun's upper atmosphere,exerts a profound influence on celestial bodies throughout the solar system[1].For planets with intrinsic magnetic fi... The solar wind,a continuous stream of charged particles emitted from the Sun's upper atmosphere,exerts a profound influence on celestial bodies throughout the solar system[1].For planets with intrinsic magnetic fields,such as Earth,this particle stream interacts with the planetary magnetic field,forming a protective bubble known as the magnetosphere[2].The magnetopause,the outer boundary of the magnetosphere,serves as a protective shield against atmospheric erosion by limiting direct solar-wind penetration and regulating energy transfer from the solar wind into the magnetosphere[2,3]. 展开更多
关键词 dayside magnetopause stream charged particles magnetic fieldssuch celestial bodies particle stream radial interplanetary magnetic field atmospheric erosion large scale distortion
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Chaotic motions in Newton’s gravity field revealed from energy flow investigations 认领 引用
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作者 Jing Tang Xing 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2026年第7期495-504,共10页
Mathematicians have searched for evidence of motion stability in the Solar System.A predication indicated“Earth’s orbit can become chaotic”.Until now,no theoreticalumerical results have been found for chaotic motio... Mathematicians have searched for evidence of motion stability in the Solar System.A predication indicated“Earth’s orbit can become chaotic”.Until now,no theoreticalumerical results have been found for chaotic motion orbits in Newton’s gravity field.Newton’s gravity field is one of the central-force fields,like electromagnetic/quantum ones,so its motion characteristics revealed can be applied to the research of quantum systems.This paper intends to tackle this historic problem based on the energy flow numerical investigations.We have shown some chaotic motions in Newton’s gravity field.Depending on initial conditions,mechanical-energy H,and angular-momentum,particle motion-paths are hyperbolas(H>0)or parabolas(H=0)as infinite motions.Negative energies(H<0)show ellipse orbits of periodic motions with constant timeaveraged potential/kinetic energies and zero-time-averaged energy flows.Chaotic motion,appearing when H<0 due to small disturbances/initial conditions,behaves periodic one of infinite period:a repeating motion between the two zero-radial-speed circles,and its starting and ending points never coincide,and the characteristics of time-averaged energy-flow variables are the same as the periodical ones when the average time tends to infinity.Therefore,the revealed chaotic motion is a stable infinite long period periodical motion restricted to a finite space.This result can address the prediction of the chaotic Earth’s orbit.New findings will benefit in tackling particle motions in central-force fields of modern physics.The energy-flow theory provides a generalised means to reveal hidden nonlinear phenomena of nature. 展开更多
关键词 Energy-flow theory Motions in gravity fields Periodical motions Chaotic orbit of Earth’motion Chaotic motions in central force fields
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Laser-optical-field-modulation fabricating large-aperture dual-band antireflection windows for MWIR and LWIR imaging 认领 引用 被引量：2
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作者 Yulong Ding Cong Wang +8 位作者 Xianshi Jia Linpeng Liu Zheng Gao Xiang Jiang Shiyu Wang Dejin Yan Nai Lin Zhou Li Ji’an Duan 《International Journal of Extreme Manufacturing》 SCIE EI CAS CSCD 2026年第2期560-574,共15页
Dual-band antireflection(DBAR)windows based on surface microstructures offer a promising solution for mid-wave infrared(MWIR)and long-wave infrared(LWIR)co-aperture composite imaging.However,micro-nano manufacturing t... Dual-band antireflection(DBAR)windows based on surface microstructures offer a promising solution for mid-wave infrared(MWIR)and long-wave infrared(LWIR)co-aperture composite imaging.However,micro-nano manufacturing technology faces significant challenges in efficiently producing highly uniform microstructures with characteristic dimensions of∼1μm across hundreds of millimeters.Here,we report a laser optical field modulation(LOFM)technology for the rapid manufacture of ultra-large-scale arrays of antireflection microholes(ARMHs)on large-aperture and non-perfectly planar windows.LOFM technology,which modulates laser pulses in both temporal and spatial domains,enhances ARMH aspect ratios from 0.1 to 0.8 without reducing manufacturing time,and maintains processing accuracy even with laser focus shifts,thereby addressing inconsistencies in large-area processing.As a proof of concept,approximately 7 billion ARMHs are fabricated on a 100-mm-diameter zinc sulfide(ZnS)window at a rate of 20000 holes per second using LOFM technology assisted by machine learning.The fabricated DBAR ZnS window exhibits ultra-broadband(3.5−14μm),high transmittance(91.1%),wide-angle transmission,wear-resistant,and self-cleaning,making it suitable for environments with multiple interference factors.Dual-band imaging applications demonstrate the significant advantages of DBAR windows in target recognition,multi-scenario robustness,and information acquisition. 展开更多
关键词 laser optical field modulation large-aperture window non-perfectly planar antireflection microstructure dual-band infrared imaging
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Evaluation and application of an innovative portable field endoscope:addressing battlefield and biosafety concerns 认领 引用 被引量：1
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作者 Gang Sun Jia-Qi Zeng +11 位作者 Jun-Ling Wu Shu-Fang Wang Li-Hua Peng Bin Yan Fei Pan Yi Li Guan-Zhou Zhou Xiao-Dong Chen Zi-Kai Wang Xiang-Dong Wang Wan-Yuan Lian Yun-Sheng Yang 《Military Medical Research》 SCIE CAS CSCD 2026年第3期353-364,共12页
Background:At present,no commercially available endoscopic system is specifically designed for use in the battlefield,disaster relief,or unique environments with biosafety concerns.Therefore,this limitation stems from... Background:At present,no commercially available endoscopic system is specifically designed for use in the battlefield,disaster relief,or unique environments with biosafety concerns.Therefore,this limitation stems from challenges such as limited portability,reliance on stable power,complex disinfection processes,and the risk of incomplete sterilization.To address these challenges,we developed a novel portable endoscopic system and evaluated its safety and effectiveness in both routine settings and specialized scenarios,including the global pandemic caused by a novel coronavirus,which represents an environment with biosafety concerns.Methods:After sample size calculation,30 patients underwent esophagogastroduodenoscopy(EGD)or colonoscopy using the YunSendo(the experimental group)and Olympus systems(the control group)in a randomized order.Operation time,image quality,operational performance,lesion detection,and safety were assessed.Ten emergency patients with suspected upper gastrointestinal bleeding received bedside treatment using the YunSendo system during the global pandemic caused by a novel coronavirus.Clinical outcomes in emergency endoscopic treatment were assessed.Results:No significant differences were observed between the YunSendo and Olympus groups in terms of image quality,lesion detection,and overall procedural performance.YunSendo facilitated biopsy and colonic polyp removal;no adverse endoscopy events were reported.YunSendo successfully executed diagnostic and therapeutic procedures in emergencies,with no observed mortality at 1,7,or 30 d,no rebleeding at 1 or 30 d,and no cross-infection rates.Conclusions:The performance of the YunSendo portable endoscopic system was comparable to the Olympus system in terms of key metrics,demonstrating its utility in urgent scenarios.This novel system is particularly promising for medical rescue and military missions and for addressing battlefield and biosafety concerns. 展开更多
关键词 Portable gastrointestinal endoscopy Gastrointestinal bleeding Colonoscopy Endoscopic procedures Field endoscopy
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Cooperative Sensing for 6G ISAC:Concept,Key Technologies,Performance Evaluation,and Field Trial 认领 引用 被引量：1
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作者 Guangyi Liu Lincong Han +7 位作者 Rongyan Xi Liang Ma Zixiang Han Yahui Xue Hanting Zhao Jing Jin Qixing Wang Fei Xu 《Engineering》 SCIE EI CSCD 2026年第1期130-148,共19页
Cooperative integrated sensing and communication(ISAC),an advanced version of ISAC,is becoming an inevitable paradigm in sixth-generation mobile information networks.Based on the foundation of largescale deployed mobi... Cooperative integrated sensing and communication(ISAC),an advanced version of ISAC,is becoming an inevitable paradigm in sixth-generation mobile information networks.Based on the foundation of largescale deployed mobile networks,cooperative ISAC holds promise to realize ubiquitous sensing,thus becoming a significant step in promoting the transformation from connected things to connected intelligence.In this paper,we depict a sweeping panorama of cooperative ISAC,including the concept,key technologies,a performance evaluation framework,and field trials.We start by introducing the application scenarios of cooperative ISAC,which are the motivation for its commercialization.Next,from the perspective of technical development,we trace the evolution of cooperative ISAC,noting that cooperation within sensing and communication is an objective trend.We reveal the four core features of cooperative ISAC-denoted herein as network-enabled,integration,cooperation,and everything-and provide a general system model.Regarding key technologies,we introduce our contributions to antenna array design,cooperative clustering,synchronization,and data fusion,as well as interference management and networking.We also propose an evaluation framework and define several key performance indicators for cooperative ISAC.Through system-level simulations and field trials,we show the practical application feasibility of cooperative ISAC.Finally,we provide guidance on future research directions in cooperative ISAC. 展开更多
关键词 Sixth generation Integrated sensing and communication Cooperative sensing Synchronization Data fusion Field trial
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The War for Fertile Soil:Advancements in Soil Nutrient Field Sensors 认领 引用 被引量：1
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作者 Daming Dong Ning Wang +2 位作者 Hongwu Tian Shixiang Ma Chunjiang Zhao 《Engineering》 SCIE EI CSCD 2026年第5期7-10,共4页
1.Introduction Soil is the foundation of agriculture and of life itself[1],and fertile soil gives birth to crops with rich nutrients.Crops have significant species-specific demands for soil nutrients,including nitroge... 1.Introduction Soil is the foundation of agriculture and of life itself[1],and fertile soil gives birth to crops with rich nutrients.Crops have significant species-specific demands for soil nutrients,including nitrogen(N),phosphorus(P),potassium(K),trace elements,and so forth.Differences in crop nutrient needs are mainly due to the physiological characteristics of the development of different organs and the diversity of metabolic pathways.For example,leafy crops(spinach,lettuce,etc.)require more N for stem and leaf growth,while fruit crops(tomatoes,peppers,soybeans,etc.)rely on more P and K to facilitate the formation of organs such as seeds and fruits.Cereal crops(corn,wheat,etc.)have a prominent demand for N and silicon(Si),which are used for protein synthesis and to increase stem strength,while fruit trees are sensitive to trace elements such as calcium(Ca)and magnesium(Mg),which are used to stabilize cell walls and promote photosynthesis. 展开更多
关键词 soil nutrients field sensors physiological characteristics crop nutrient needs fruit crops cereal crops soil nutrientsincluding metabolic pathways
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Reconstructed organic rice fields:Effects on soil organic carbon,total nitrogen,their mineralization,and rice yield in Japanese Andosols 认领 引用 被引量：1
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作者 Valensi Kautsar Takamori Kanno +5 位作者 Kaho Sakai Riza Kurnia Sabri Keitaro Tawaraya Kazunobu Toriyama Kazuhiko Kobayashi Weiguo Cheng 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2026年第2期493-500,共8页
To examine the impact of anthropogenic land reconstruction,particularly the consolidation of small terraces into larger fields,on soil organic carbon(SOC),total nitrogen(TN)dynamics,rice yield,and its components,soil ... To examine the impact of anthropogenic land reconstruction,particularly the consolidation of small terraces into larger fields,on soil organic carbon(SOC),total nitrogen(TN)dynamics,rice yield,and its components,soil and plant samples were collected from seven newly reconstructed fields in Japanese Andosols in Tochigi,Japan.Samples were obtained from both the former low-and high-elevation sides within each field plot.During harvest season,nine rice plants were randomly selected from each plot(0.675 m2,comprising 3 rows and 3 hills per row),collected from a 3-m stretch along both the east(former low side)and west(former high side)ridges.Soil cores were collected from identical plots at two depths(0–15 and 15–30 cm)and combined into one composite sample per layer.Rice plant samples were air-dried for two weeks until reaching constant moisture content,after which stems and ears were separated and weighed to determine biomass,yield,yield components,and nitrogen uptake.This indicated that land reconstruction significantly affected rice yield and its components between the two sides of all field plots.SOC,TN,and their decomposition following land reconstruction showed notable changes,especially in the 15–30 cm subsurface soil layer.Additionally,grain weight demonstrated significant correlation with SOC,TN,and carbon decomposition in both the 0–15 and 15–30 cm layers,indicating that soil fertility to a depth of 30 cm was crucial for rice productivity after land reconstruction. 展开更多
关键词 Japanese Andosols different soil layers organic rice farming reconstructed fields rice yield
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Comparison of strain and temperature fields between Micro-NPR and PR anchor rods under uniaxial tension 认领 引用
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作者 ZHANG Weilong YANG Dong +2 位作者 TAO Zhigang GUO Yuhan ZHENG Hu 《Journal of Mountain Science》 SCIE CSCD 2026年第1期370-379,共10页
The deformation characteristics and thermal response of anchor rods are crucial for ensuring the stability and safety of surrounding rock support structures.However,existing research has predominantly concentrated on ... The deformation characteristics and thermal response of anchor rods are crucial for ensuring the stability and safety of surrounding rock support structures.However,existing research has predominantly concentrated on the mechanical performance of anchor rods,with limited attention to the coupled evolution of strain and temperature fields during tensile deformation.This knowledge gap hinders a comprehensive understanding of the synergistic mechanical-thermal response mechanisms in anchor rods under loading conditions.To address this limitation,the present study systematically investigated the evolution of strain and temperature fields,along with their correlation,during the test of micro-negative Poisson's ratio(NPR)and ordinary Poisson's ratio(PR)anchor rods.Digital image correlation(DIC)and infrared thermography(IRT)techniques were employed for this exploration.The uniaxial tensile tests were conducted at two different rates,and the ordinary PR anchor rod(Q235 anchor rod)was established as a control group for comparative analysis.The findings reveal that the micro-NPR anchor rod exhibit strain localization at multiple locations during the tensile process,whereas Q235 anchors show local strain concentration in only one region.The standard deviation evolution curves for both the strain and temperature field exhibit two distinct phases in the two anchor rods.The evolution patterns between these two types of curves are basically consistent.The two standard deviation curves for the micro-NPR anchor rod display a wavy increase in the second phase,while for the Q235 anchor rod,they increase steadily until the specimen is damaged.The correlation analysis reveals that the standard deviations of strain and temperature differences for both types of anchor rods are significantly correlated.These findings demonstrate the synergistic evolution mechanism of deformation and thermal response,providing a potential foundation for utilizing thermal monitoring to assess the stability of rock support structures. 展开更多
关键词 Micro-NPR anchor rod Q235 anchor rod Strain field Temperature field Standard deviation Uniaxial tensile
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Probing surface trapping field effects on dielectric nanoparticles 认领 引用
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作者 XINGLEI LONG PENGCHENG ZHANG +5 位作者 YUANHANG TONG MENGHANG SHI ZHENGJUN YE JIAXUAN CHEN WENBIN ZHANG JIAN WU 《Photonics Research》 SCIE EI CAS CSCD 2026年第5期2162-2169,共8页
Charge-interaction-induced surface trapping fields are pivotal in ultrafast dynamics of laser-ionized nanoparticles,steering the surface charge carriers and molecular reactions central to nanoscale catalysis and surfa... Charge-interaction-induced surface trapping fields are pivotal in ultrafast dynamics of laser-ionized nanoparticles,steering the surface charge carriers and molecular reactions central to nanoscale catalysis and surface chemistry.Here,we experimentally investigated the trapping fields built on the surface of the isolated SiO2 nanoparticles irradiated by intense femtosecond laser pulses.Employing reaction nanoscopy,we measured laser-intensity-dependent electron and ion emission,distinguishing nanoparticle events from background gas contributions. 展开更多
关键词 nanoscale catalysis trapping fields surface trapping fields charge interaction induced ultrafast dynamics molecular reactions surface chemistryherewe dielectric nanoparticles
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A strategy for achieving a low-field MRI magnet system with lightweight design and good magnetic field temperature stability 认领 引用
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作者 Peng Shen Jiangqian Guo +7 位作者 Jingzhi Han Ziheng Zhang Xuegang Chen Wenyun Yang Jie Liu Xianghao Ji Dong Zhou Jinbo Yang 《Chinese Physics B》 SCIE EI CAS CSCD 2026年第5期610-616,共7页
We developed a low field MRI magnet system utilizing a hybrid magnetic circuit composed of sintered neodymium iron boron(Nd-Fe-B)magnet and sintered samarium cobalt(Sm-Co)magnet based on the theoretical simulations.Th... We developed a low field MRI magnet system utilizing a hybrid magnetic circuit composed of sintered neodymium iron boron(Nd-Fe-B)magnet and sintered samarium cobalt(Sm-Co)magnet based on the theoretical simulations.The static magnetic field of the magnet system with a magnetic pole plate diameter of 58 cm and a distance of 32 cm between the upper and lower pole plates reaches 0.07 T and exhibits magnetic field inhomogeneity fluctuations of less than 850 ppm over a temperature variation of±4℃around the set point of 24℃.While it merely weighs 384 kg.Our findings indicate that a hybrid magnetic circuit composed of these two types of magnets contributes to both the lightweight design and temperature stability of the MRI magnet system.Finally,we evaluated the imaging effects of this magnet system. 展开更多
关键词 low-field MRI hybrid magnetic circuit lightweight magnetic field temperature stability
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