We theoretically investigate chaotic dynamics in an optomechanical system composed of a whispering-gallery-mode(WGM)microresonator and a *** find that tuning the optical phase using a phase shifter and modifying the c...
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We theoretically investigate chaotic dynamics in an optomechanical system composed of a whispering-gallery-mode(WGM)microresonator and a *** find that tuning the optical phase using a phase shifter and modifying the coupling strength via a unidirectional waveguide(IWG)can induce chaotic *** underlying reason for this phenomenon is that adjusting the phase and coupling strength via the phase shifter and IWG bring the system close to an exceptional point(EP),where field localization dynamically enhances the optomechanical nonlinearity,leading to the generation of chaotic *** addition,due to the sensitivity of chaos to phase in the vicinity of the EP,we propose a theoretical scheme to measure the optical phase perturbations using *** work may offer an alternative approach to chaos generation with current experimental technology and provide theoretical guidance for optical signal processing and chaotic secure communication.
Municipal solid waste incineration bottom ash(MSWIBA)is a complex assemblage of aluminosilicate materials encompassing diverse solid ***,its complexity poses great challenges to their resource *** the sake of the alka...
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Municipal solid waste incineration bottom ash(MSWIBA)is a complex assemblage of aluminosilicate materials encompassing diverse solid ***,its complexity poses great challenges to their resource *** the sake of the alkali activation use of MSWIBA,this work focused on the characterizations and alkaline leaching experiments of various classified MSWIBA after *** the different categories of MSWIBA,waste glass(BA-G)and other unidentified slags(BA-O)were identified as potential precursors for alkali activation *** alkaline leaching experiments proved that alkaline concentration,reaction temperature,reaction time,and raw material classification influenced the leaching process and *** these,the Si/Al chemical bonding environments from the material type played a pivotal *** the materials had Q_(n)(n>2)as the primary bonding structure,steric hindrance by the chain frameworks affected the alkali dissolution process,resulting in gradual disintegration from the outer layers *** the materials dominated by Q1 frameworks,OH-could penetrate the frameworks,leading to their rapid depolymerization and outward ***,the Si/Al bonding environment played a crucial role in alkaline dissolution,providing theoretical guidance for classifying the alkali-activation utilization of MSWIBA and other aluminosilicate solid wastes.
Chlorite(ClO_(2)^(−)or COI)is used to establish the advanced reduction and oxidation process(AROP).The iron/biochar-based particles(iron-based hydrothermal carbon with hinge-like structure,FebHCs,20 mg/L)can be utiliz...
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Chlorite(ClO_(2)^(−)or COI)is used to establish the advanced reduction and oxidation process(AROP).The iron/biochar-based particles(iron-based hydrothermal carbon with hinge-like structure,FebHCs,20 mg/L)can be utilized to activate COI(2 mmol/L)to present selective oxidation in removing triphenylmethane derivatives(15 min,90%).The protonation(H+at~102μmol/L level)played a huge role(k-2nd=0.136c-H+−0.014(R^(2)-adj=0.986),and rapp=−0.0876/c-H++1.017(R^(2)-adj=0.996))to boost the generation of the active species(e.g.,high-valent iron oxidizing species(HVI=O)and chlorine dioxide(ClO_(2))).The protonation-coupled electron transfer promoted Fe-substances in Feb/HCs activating COI(the calculated kobs ranging from 0.066−0.285 min^(−1)).The form of ClO_(2) mainly attributed to proton-coupled electron transfer(1e/1H+).The HVI=O was generated from the electron transfer within the coordination ***,carbon particles in FebHCs serve as the bridge for electron *** above roles contribute to the fracture and formation of coordination-induced bonds between Lx-FeII/III and ClO_(2)^(−)at phase interface to form *** ultrasonic(US)cavitation enhanced the mass transfer of active species in bulk solution,and the HVI=O and ClO_(2) attack unsaturated central carbon atoms of triphenylmethane derivatives to initiate selective ***,the scale-up experiment with continuous flow(k values of approximately 0.2 min^(−1),COD removal efficiency of approximately 80%)and the reactor with COMSOL simulation have also proved the applicability of the *** study offers a novel AROP and new insights into correspondingly heterogeneous interface activation mechanisms.
Aqueous zinc-ion batteries（AZIBs） are gaining attention owing to their affordability,high safety,and high energy density,making them a promising solution for large-scale energy ***,their performance is hampered by t...
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Aqueous zinc-ion batteries（AZIBs） are gaining attention owing to their affordability,high safety,and high energy density,making them a promising solution for large-scale energy ***,their performance is hampered by the instability of both the anode-electrolyte interface and the cathode-electrolyte *** use of sodium gluconate（SG）,an organic sodium salt with multiple hydroxyl groups,as an electrolyte additive is *** and theoretical analyses demonstrate that Na+from SG can intercalate and deintercalate within the associated V2O5cathode during in situ electrochemical *** action supports the layered structure of V2O5,prevents structural collapse and phase transitions,and enhances Zn2+diffusion ***,the gluconate anion disrupts the original Zn2+solvation structure,mitigates water-induced side reactions,and suppresses Zn dendrite *** synchronous regulation of both the V2O5cathode and Zn anode by the SG additive leads to considerable performance ***‖Zn symmetric batteries demonstrate a cycle life exceeding 2800 h at 0.5 mA cm-2and 1 mAh *** Zn‖V2O5full batteries,a high specific capacity of 288.92 mAh g-1and capacity retention of 82.29% are maintained over 1000 cycles at a current density of 2 A *** multifunctional additive strategy offers a new pathway for the practical application of AZIBs.
Optical Coherence Tomography (OCT) imaging is extensively utilized for non-invasive observation of pathological conditions, such as retinal fluid-associated diseases. Accurate fluid segmentation in OCT images is there...
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As humans and robots work closer together than ever,anthropomorphic robotic arms with intuitive human-robot interaction interfaces have drawn massive attention to improving the quality of robot-assisted *** pursuit of...
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As humans and robots work closer together than ever,anthropomorphic robotic arms with intuitive human-robot interaction interfaces have drawn massive attention to improving the quality of robot-assisted *** pursuit of this,we designed a dedicated 7-degrees-of-freedom(DoF)anthropomorphic robotic arm having three compact differential joints and a head-mounted gaze tracker enabling head-pose-tracked 3D gaze ***,two key challenges were addressed to achieve accurate robot-assisted manipulation of the object indicated by the direction of human ***,a novel predictive pupil feature was proposed for 3D gaze *** from most existing features subjected to the common paraxial approximation assumption,the proposed novel predictive pupil feature considered the light refraction at two corneal surfaces with a more realistic eye model,significantly improving the 3D gaze estimation accuracy when the eyeball rotates at large ***,a novel optimization-based approach was developed to efficiently compensate for the posture errors of the designed 7-DoF anthropomorphic robotic arm for accurate *** with the existing Jacobian-based or optimization-based approaches with nominal joint values as iteration initial,the proposed approach computed the optimal iteration initial and realized faster convergence for real-time posture error *** the posture error compensation in real time and 3D gaze estimated accurately,the human can command accurate robot-assisted manipulation using his eyes *** proposed system was successfully tested on five healthy subjects.
Dynamic wireless charging provides a novel solution for extending the range of electric vehicles, but requires stable power transmission to maintain reliability. To reduce dynamic driving power fluctuations, this arti...
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The Telecare Medicine Information System (TMIS) revolutionizes healthcare delivery by integrating medical equipment and sensors, facilitating proactive and cost-effective services. Accessible online, TMIS empowers pat...
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As an important and effective indicator of contact heat transfer,thermal contact resistance is a widespread phenomenon in *** can directly affect product reliability,full-load performance,power consumption and even li...
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As an important and effective indicator of contact heat transfer,thermal contact resistance is a widespread phenomenon in *** can directly affect product reliability,full-load performance,power consumption and even life cycle in energy,aerospace,electronic packaging,cryogenic refrigeration,***,enhancing the interface heat transfer and suppressing thermal contact resistance have become increasingly *** this background,this paper seeks to elaborate on conceptions of thermal contact resistance and the ways to reduce *** reviewing the existing methods of measuring thermal contact resistance and characterizing the interface morphology,we highlight the theoretical underpinnings of thermal contact resistance,including the two-dimensional mathematic characteristics of the contact interface and the theoretical and empirical models for quantifying *** categories of influencing factors,i.e.,thermal,geometrical and mechanical states,are then *** on the macroscopic formation mechanism,the paper summarizes the existing methods for suppressing thermal contact resistance,with close attention paid to polymer composite thermal interfacial materials and metal interfacial materials filled with high thermal conductivity *** light of the findings,this review provides five promising directions for future research on thermal contact *** suggests that the failure modes and service life of interface materials are essential to apply such technologies to suppress thermal contact resistance in *** review will be a guide for future research in thermal contact resistance and for the widespread use of composite interface materials.
Low earth orbit(LEO)satellites with wide coverage can carry the mobile edge computing(MEC)servers with powerful computing capabilities to form the LEO satellite edge computing system,providing computing services for t...
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Low earth orbit(LEO)satellites with wide coverage can carry the mobile edge computing(MEC)servers with powerful computing capabilities to form the LEO satellite edge computing system,providing computing services for the global ground *** this paper,the computation offloading problem and resource allocation problem are formulated as a mixed integer nonlinear program(MINLP)*** paper proposes a computation offloading algorithm based on deep deterministic policy gradient(DDPG)to obtain the user offloading decisions and user uplink transmission *** paper uses the convex optimization algorithm based on Lagrange multiplier method to obtain the optimal MEC server resource allocation *** addition,the expression of suboptimal user local CPU cycles is derived by relaxation *** results show that the proposed algorithm can achieve excellent convergence effect,and the proposed algorithm significantly reduces the system utility values at considerable time cost compared with other algorithms.
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