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Biopolymers-based skin-interfaced triboelectric sensors

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Nano Research 2023年第9期16卷 11753-11782页

作者： Shujia Xu Pedro Henrique de Souza Barbosa Wenzhuo wu School of Industrial Engineering Purdue UniversityWest LafayetteIN 47907USA Flex Laboratory Purdue UniversityWest LafayetteIN 47907USA Regenstrief Center for Healthcare Engineering Purdue UniversityWest LafayetteIN 47907USA Birck Nanotechnology Center Purdue UniversityWest LafayetteIN 47907USA The Center for Education and Research in Information Assurance and Security(CERIAS) Purdue UniversityWest LafayetteIN 47907USA

Rapid advances in artificial intelligence,robotics,and remote healthcare have increased the demand for sustainable and highperformance wearable *** devices are gaining traction due to their self-powered operation capability and potential as wearable energy ***-interfaced triboelectric sensors(SITSs)can detect various mechanical signals and monitor physiological signals in ***-based SITSs are ideal for skin-interfaced applications since they are biocompatible and *** review focuses on the recent advancements of SITS made from biocompatible polymer materials,such as plant-based,animal-based,and synthetic polymers,and highlights their potential for various applications,including human–machine interface(HMI)and physiological *** addition,the fundamentals,challenges,and prospects of SITS based on biocompatible polymers are discussed.

关键词： skin interfaced triboelectric sensors wearable devices biopolymers

Vortex-Induced Vibrations of A Free-Spanning Pipe Based on A Nonlinear Hysteretic Soil Model at the Shoulders

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China Ocean Engineering 2020年第3期34卷 328-340页

作者： GAO Xi-feng XIE wu-de XU Wan-hai State Key Laboratory of Hydraulic Engineering Simulation and Safety Tianjin UniversityTianjin 300072China

The pipe-soil interactions at shoulders can significantly affect the vortex-induced vibrations (VIV) of free-spanning pipes in the subsea. In this paper, the seabed soil reacting force on the pipe is directly calculated with a nonlinear hysteretic soil model. For the VIV in the middle span, a classic van der Pol wake oscillator is adopted. Based on the Euler-Bernoulli beam theory, the vibration equations of the pipe are obtained which are different in the middle span and at the two end shoulders. The static configuration of the pipe is firstly calculated and then the VIV is *** present model is validated with the comparisons of VIV experiment, pipe-soil interaction experiment and the simulation results of VIV of free-spanning pipes in which the seabed soil is modelled with spring-dashpots. With the present model, the influence of seabed soil on the VIV of a free-spanning pipe is analyzed. The parametric studies show that when the seabed soil has a larger suction area, the pipe vibrates with smaller bending stresses and is *** with the increase of the shear strength of the seabed soil, the bending stresses increase and the pipe faces more danger.

关键词： free-spanning pipe vortex-induced vibrations nonlinear hysteretic soil model bending stresses

Ethanol-assisted synthesis of a Ni single-atom catalyst with poriferous 3D framework for efficient cascade CO_(2)electroreduction

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Rare Metals 2024年第9期43卷 4612-4619页

作者： Feng wu Shi-Qi Wang Sebastian Kunze Xiao-Ping Gao Pei-Qun Yin Yu-En wu Division of Life Sciences and Medicine Department of EndocrinologySchool of Chemistry and Materials ScienceThe First Affiliated Hospital of USTCUniversity of Science and Technology of ChinaHefei 230026China Department of Chemistry Seoul National UniversitySeoul 08826South Korea School of Biomedical Engineering Anhui Medical UniversityHefei 230032China

The electroreduction of carbon dioxide to generate multicarbon products is significant for achieving a carbon-neutral ***,the selectivity for multi-carbon products faces several challenges,such as the intricate nature of the multistep hydrogenation processes,slow reaction kinetics and the bicarbonate precipitate issue caused by alkaline *** factors hinder the extensive utilization of this ***,we successfully developed and implemented a tandem electrolyzer cascade to separate and optimize the complex elementary reactions involved in the process of multi-carbon production.

关键词： reaction. synthesis catalyst

PERIODICAL PRESSURE-DRIVEN FLOWS IN MICROCHANNEL WITH WALL SLIP VELOCITY AND ELECTRO-VISCOUS EFFECTS

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Journal of Hydrodynamics 2010年第6期22卷 829-837页

作者： WANG Lei wu Jian-kang Department of Mechanics Huazhong University of Science and Technology National Laboratory forOptoelectronics Wuhan 430074 China

In a microfluidic system, the flow slip velocity on a solid wall can be the same order of magnitude as the average velocity in the microchannel. The flow-electricity interaction in a complex microfluidic system subjected to a joint action of wall slip and electro-viscosity is an important topic. An analytical solution for the periodical pressure-driven flow in a two-dimensional uniform microchannel, with consideration of wall slip and electro-viscous effect is obtained based on the Poisson-Boltzmann equation for the Electric Double Layer （EDL） and the Navier-Stokes equations for the liquid flow. The analytic solutions agree well with the numerical solutions. The analytical results indicate that the periodical flow velocity and the Flow-Induced Electric Field （FIEF） strongly depend on the frequency Reynolds number （Re = （wh2/v ）, that is a function of the frequency, the channel size and the kinetic viscosity of fluids. For Re 〈 1, the flow velocity and the FIEF behave similarly to those in a steady flow, whereas they decrease rapidly with Re as Re 〉 1. In addition, the electro-viscous effect greatly influences the periodical flow velocity and the FIEF, particularly, when the electrokinetic radius kH is small. Furthermore, the wall slip velocity amplifies the FIEF and enhances the electro-viscous effect on the flow.

关键词： electrokinetic flow frequency Reynolds number wall slip electro-viscous effects Flow-Induced Electric Field (FIEF)

Nanoparticle-Mediated Lipid Metabolic Reprogramming of T Cells in Tumor Microenvironments for Immunometabolic Therapy

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Nano-Micro Letters 2021年第2期13卷 180-206页

作者： Dongyoon Kim Yina wu Qiaoyun Li Yu-Kyoung Oh College of Pharmacy and Research Institute of Pharmaceutical Sciences Seoul National UniversitySeoul 08826Republic of Korea

We report the activation of anticancer effector functions of T cells through nanoparticle-induced lipid metabolic *** was encapsulated in amphiphilic polygamma glutamic acid-based nanoparticles(F/ANs),and the surfaces of F/ANs were modified with an anti-CD3e f(ab′)2 fragment,yielding aCD3/F/*** in vitro study reveals enhanced delivery of aCD3/F/ANs to T cells compared with plain F/***3/F/AN-treated T cells exhibited clear mitochondrial cristae,a higher membrane potential,and a greater mitochondrial oxygen consumption rate under glucose-deficient conditions compared with T cells treated with other nanoparticle *** proliferatoractivated receptor-αand downstream fatty acid metabolismrelated genes are expressed to a greater extent in aCD3/F/AN-treated T *** of fatty acid metabolism by aCD3/F/ANs supports the proliferation of T cells in a glucose-deficient environment mimicking the tumor ***-time video recordings show that aCD3/F/AN-treated T cells exerted an effector killing effect against B16F10 melanoma *** vivo administration of aCD3/F/ANs can increase infiltration of T cells into tumor *** treatment of tumor-bearing mice with aCD3/F/ANs enhances production of various cytokines in tumor tissues and prevented tumor *** findings suggest the potential of nanotechnology-enabled reprogramming of lipid metabolism in T cells as a new modality of immunometabolic therapy.

关键词： Metabolic reprogramming T cells Fatty acid metabolism Immunometabolic therapy Mitochondrial function

Deep unfolding multi-scale regularizer network for image denoising

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Computational Visual Media 2023年第2期9卷 335-350页

作者： Jingzhao Xu Mengke Yuan Dong-Ming Yan Tieru wu School of Mathematics Jilin UniversityChangchun 130012China National Laboratory of Pattern Recognition Institute of AutomationChinese Academy of SciencesBeijing 100190China School of Artificial Intelligence University of Chinese Academy of SciencesBeijing 100049China.

Existing deep unfolding methods unroll an optimization algorithm with a fixed number of steps,and utilize convolutional neural networks(CNNs)to learn data-driven ***,their performance is limited for two main ***,priors learned in deep feature space need to be converted to the image space at each iteration step,which limits the depth of CNNs and prevents CNNs from exploiting contextual ***,existing methods only learn deep priors at the single full-resolution scale,so ignore the benefits of multi-scale context in dealing with high level *** address these issues,we explicitly consider the image denoising process in the deep feature space and propose the deep unfolding multi-scale regularizer network(DUMRN)for image *** core of DUMRN is the feature-based denoising module(FDM)that directly removes noise in the deep feature *** each FDM,we construct a multi-scale regularizer block to learn deep prior information from multi-resolution *** build the DUMRN by stacking a sequence of FDMs and train it in an end-to-end *** results on synthetic and real-world benchmarks demonstrate that DUMRN performs favorably compared to state-of-theart methods.

关键词： image denoising deep unfolding network multi-scale regularizer deep learning

LESO-based Position Synchronization Control for Networked Multi-Axis Servo Systems With Time-Varying Delay

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IEEE/CAA Journal of Automatica Sinica 2020年第4期7卷 1116-1123页

作者： Qi wu Li Yu Yao-Wei Wang Wen-An Zhang the College of Information Engineering Zhejiang University of TechnologyZhejiang Provincial United Key Laboratory of EmbeddedHangzhou 310023China

The position synchronization control(PSC) problem is studied for networked multi-axis servo systems(NMASSs) with time-varying delay that is smaller than one sampling period. To improve the control performance of the system, time-varying delays, modeling uncertainties, and external disturbances are first modeled as a lumped disturbance. Then, a linear extended state observer(LESO) is devised to estimate the system state and the lumped disturbance, and a linear feedback controller with disturbance compensation is designed to perform individual-axis tracking control. After that, a cross-coupled control approach is used to further improve synchronization performance. The bounded-input-bounded-output(BIBO) stability of the closedloop control system is analyzed. Finally, both simulation and experiment are carried out to demonstrate the effectiveness of the proposed method.

关键词： Active-disturbance rejection controller extended state observer networked motion control system(NMCS) timevarying delays

Biochemical and physiological bases for utilization of dietary amino acids by young Pigs

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Journal of Animal Science and Biotechnology 2013年第2期4卷 90-101页

作者： Reza Rezaei Weiwei Wang Zhenlong wu Zhaolai Dai Junjun Wang Guoyao wu Department of Animal Science Texas A&M University College Station State Key Laboratory of Animal Nutrition China Agricultural University

Protein is quantitatively the most expensive nutrient in swine diets. Hence it is imperative to understand the physiological roles played by amino acids in growth, development, lactation, reproduction, and health of pigs to improve their protein nutrition and reduce the costs of pork production. Due to incomplete knowledge of amino acid biochemistry and nutrition, it was traditionally assumed that neonatal, post-weaning, growing-finishing, and gestating pigs could synthesize sufficient amounts of all ＂nutritionally nonessential amino acids＂（NEAA） to support maximum production performance. Therefore, over the past 50 years, much emphasis has been placed on dietary requirements of nutritionally essential amino acids as building blocks for tissue proteins. However, a large body of literature shows that NEAA, particularly glutamine, glutamate, arginine and proline regulate physiological functions via cell signaling pathways, such as mammalian target of rapamycin, AMP-activated protein kinase, extracellular signal-related kinase, Jun kinase, mitogen-activated protein kinase, and NEAA-derived gaseous molecules （e.g., nitric oxide, carbon monoxide, and hydrogen sulfide）. Available evidence shows that under current feeding programs, only 70% and 55% of dietary amino acids are deposited as tissue proteins in 14-day-old sow-reared piglets and in 30-day-old pigs weaned at 21 days of age, respectively. Therefore, there is an urgent need to understand the robes and dietary requirements of NEAA in swine nutrition. This review highlights the basic biochemistry and physiology of absorption and utilization of amino acids in young pigs to enhance the efficacy of utilization of dietary protein and to minimize excretion of nitrogenous wastes from the body.

关键词： Amino acids Metabolism Nutrition Pigs

Influence of Cr_(2)_(3)content on viscosity and rheological behavior of Cr_(2)O_(3)-containing slags

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Journal of Iron and Steel Research International 2022年第4期29卷 601-611页

作者： Fang Yuan Zheng Zhao Yan-ling Zhang Tuo wu State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

The rheological behavior of Cr_(2)_(3)-containing slags was investigated using a rotating cylinder viscometer and the solid fraction and phases of Cr_(2)_(3)in molten slags were also calculated and observed at different ***,the viscosities of CaO–SiO2–Cr_(2)_(3)(–10%Al2O3)slags were measured from 1703 to 1953 K and the influence of Cr_(2)_(3)content on the viscosity and rheological behavior of molten slags was *** calculation revealed that the solid fraction of the molten slags varied with the Cr_(2)_(3)content and maximum temperature,and the fluid properties transitioned from Newtonian to non-Newtonian behavior when the solid fraction reached 5%.Moreover,the increase in Cr_(2)_(3)content led to an increase in the viscosity as the slags displayed Newtonian flow characteristics and a decrease in the viscosity when slags exhibited non-Newtonian flow *** viscosity results of Cr_(2)_(3)-containing slag from 1703 to 1953 K and from 1703 to 1813 K were also discussed with the morphologies.

关键词： Viscosity Rheology behavior Cr_(2)_(3)-containing slag Morphology