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In situ Mineralization of Biomass-derived Hydrogels Boosts Capacitive Electrochemical Energy storage in Free-standing 3d Carbon Aerogels

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Energy & Environmental Materials 2024年第2期7卷 359-371页

作者： Anjali Achazhiyath Edathil Babak rezaei Kristoffer Almdal stephan sylνest Keller National Centre for Nano Fabrication and Characterization DTU NanolabTechnical University of Denmark2800LyngbyDenmark dTU Chemistry Technical University of Denmark2800LyngbyDenmark

Here,a novel fabrication method for making free-standing 3d hierarchical porous carbon aerogels from molecularly engineered biomass-derived hydrogels is *** situ formed flower-like CaCO_(3)molecularly embedded within the hydrogel network regulated the pore structure during in situ mineralization assisted one-step activation graphitization(iMAG),while the intrinsic structural integrity of the carbon aerogels was *** homogenously distributed minerals simultaneously acted as a hard template,activating agent,and graphitization *** decomposition of the homogenously distributed CaCO_(3)during iMAG followed by the etching of residual CaO through a mild acid washing endowed a robust carbon aerogel with high porosity and excellent electrochemical *** 0.5 mA cm^(-2),the gravimetric capacitance increased from 0.01 F g^(-1)without mineralization to 322 F g^(-1)with iMAG,which exceeds values reported for any other free-standing or powder-based biomass-derived carbon *** outstanding cycling stability of~104%after 1000 cycles in 1 M HClO4 was *** assembled symmetric supercapacitor device delivered a high specific capacitance of 376 F g^(-1)and a high energy density of 26 W h kg^(-1)at a power density of 4000 W kg^(-1),with excellent cycling performance(98.5%retention after 2000 cycles).In combination with the proposed 3d printed mold-assisted solution casting(3dMAsC),iMAG allows for the generation of free-standing carbon aerogel architectures with arbitrary ***,the novel method introduces flexibility in constructing free-standing carbon aerogels from any ionically cross-linkable biopolymer while maintaining the ability to tailor the design,dimensions,and pore size distribution for specific energy storage applications.

关键词： biomass carbon aerogel sustainable energy materials free-standing supercapacitors

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Energy-efficient joint UAV secure communication and 3d trajectory optimization assisted by reconfigurable intelligent surfaces in the presence of eavesdroppers

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defence Technology（防务技术） 2024年第1期31卷 537-543页

作者： Huang Hailong Mohsen Eskandari Andrey V.savkin Wei ni The department of Aeronautical and Aviation Engineering The Hong Kong Polytechnic UniversityHong KongChina school of Electrical Engineering and Telecommunications University of New South WalesSydney2052Australia data61 CSIROAustralia

We consider a scenario where an unmanned aerial vehicle(UAV),a typical unmanned aerial system(UAs),transmits confidential data to a moving ground target in the presence of multiple *** friendly reconfigurable intelligent surfaces(RIss) help to secure the UAV-target communication and improve the energy efficiency of the *** formulate an optimization problem to minimize the energy consumption of the UAV,subject to the mobility constraint of the UAV and that the achievable secrecy rate at the target is over a given *** present an online planning method following the framework of model predictive control(MPC) to jointly optimize the motion of the UAV and the configurations of the *** effectiveness of the proposed method is validated via computer simulations.

关键词： Unmanned aerial systems(UAss) Unmanned aerial vehicle(UAV) Communication security Eaves-dropping Reconfigurable intelligent surfaces(RIs) Autonomous navigation and placement Path planning Model predictive control

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Replica symmetry breaking in 1d Rayleigh scattering system:theory and validations

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Light(science & Applications) 2024年第9期13卷 1757-1765页

作者： Yifei Qi Longqun ni Zhenyu Ye Jiaojiao Zhang Xingyu Bao Pan Wang Yunjiang Rao Ernesto P.Raposo Anderson s.L.Gomes Zinan Wang Key Lab of Optical Fiber sensing&Communications University of Electronic Science and Technology of China(UESTC)ChengduChina Laboratório de Física Teórica e Computacional Departamento de FísicaUniversidade Federal de Pernambuco50670-901 RecifePernambucoBrazil departamento de Física Universidade Federal de PernambucoRecifePernambucoBrazil

spin glass theory,as a paradigm for describing disordered magnetic systems,constitutes a prominent subject of study within statistical *** symmetry breaking(RsB),as one of the pivotal concepts for the understanding of spin glass theory,means that under identical conditions,disordered systems can yield distinct states with nontrivial *** fiber laser(RFL)based on Rayleigh scattering(Rs)is a complex disordered system,owing to the disorder and stochasticity of *** this work,for the first time,a precise theoretical model is elaborated for studying the photonic phase transition via the platform of Rs-based RFL,in which we clearly reveal that,apart from the pump power,the photon phase variation in RFL is also an analogy to the temperature term in spin-glass phase transition,leading to a novel insight into the intrinsic mechanisms of photonic phase *** addition,based on this model and real-time high-fidelity detection spectral evolution,we theoretically predict and experimentally observe the mode-asymmetric characteristics of photonic phase transition in Rs-based *** finding contributes to a deeper understanding of the photonic RsB regime and the dynamics of Rs-based RFL.

关键词： transition. symmetry breaking

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Production of Functional Materials derived from Regenerated silk Fibroin by Utilizing 3d Printing and Biomimetic Enzyme-induced Mineralization

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Chinese Journal of Polymer science 2024年第3期42卷 299-310,I0005页

作者： ni Chen Fei-Yu Luo Gong-Wen Yang Jin-Rong Yao Xin Chen Zheng-Zhong shao state Key Laboratory of Molecular Engineering of Polymers Laboratory of Advanced Materials and Department of Macromolecular ScienceFudan UniversityShanghai 200433China

Critical-sized bone defects, commonly encountered in clinical orthopedic surgery, present a significant challenge. One of the promising solutions is to prepare synthetic bone substitute materials with precise structural control, mechanical compatibility, and enhanced osteogenic induction performance, nevertheless the successful preparation of such materials remains difficult. In this study, a two-step technique,integrating an extrusion-based printing process with biomimetic mineralization induced by alkaline phosphatase(ALP), was developed. Initially,a pre-cured hydrogel of regenerated silk fibroin(RsF) with a small quantity of hydroxypropyl cellulose(HPC) and ALP was prepared through heating the mixed aqueous solution. This pre-cured hydrogel demonstrated thixotropic property and could be directly extruded into predetermined structures through a 3d-printer. subsequently, the 3d-printed RsF-based materials with ALP underwent biomimetic in situ mineralization in calcium glycerophosphate(Ca-GP) mineralizing solution, utilizing the polymer chains of RsF as templates and ALP as a trigger for cleaving phosphate bonds of Ca-GP. The resulting 3d-printed RsF-mineral composites including hydrogel and sponge possessed adjustable compression modulus of megapascal grade and variable hydroxyapatite content, which could be controlled by manipulating the duration of the mineralization ***, these 3d-printed RsF-mineral composites demonstrated non-cytotoxicity towards rat bone marrow mesenchymal stem cells. Therefore, they may hold great potential for applications involving the replacement of tissues characterized by osteoinductivity and intricate structures.

关键词： silk protein Alkaline phosphatase Extrusion-based printing Biomineralization

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Treatment of acute dacryocystitis by translacrimal canalicular drainage and d-silicone intubation

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International Journal of Ophthalmology(English edition) 2024年第9期17卷 1628-1632页

作者： Jin-Jing He Jing-Wen Gong Jia-ni Zhou Jin Jiang Center for Rehabilitation Medicine Department of OphthalmologyZhejiang Provincial People’s Hospital(Affiliated People’s Hospital)Hangzhou Medical CollegeHangzhou 310000Zhejiang ProvinceChina Xianju People’s Hospital Zhejiang Southeast Campus of Zhejiang Provincial People’s HospitalAffiliated Xianju’s HospitalHangzhou Medical CollegeTaizhou 317300Zhejiang ProvinceChina

AIM:To demonstrate the outcomes of translacrimal canalicular drainage using a lacrimal probe and intranasal drainage by d-silicone intubation for acute dacryocystitis(Ad).METHOds:This retrospective study included 23 patients with Ad and had undergone abscess decompression with the use of lacrimal probe and intranasal drainage by d-silicone intubation between January 2019 and december *** received abscess decompression and systemic antibiotic-corticosteroid from the time of diagnosis.d-silicone tube was inserted within 10d after diagnosis and removed 3-6mo after *** procedure and outcomes of this method were ***:All patients showed improvement of signs and symptoms of Ad within *** intraoperative and postoperative complications were *** recurrence of lacrimal sac abscesses occurred after d-silicone tube ***:Lacrimal probe and d-silicone intubation appear to be a feasible,minimally invasive,safe,and effective method,which could be a reasonable choice in the treatment of Ad.

关键词： acute dacryocystitis treatment translacrimal canalicular drainage d-silicone intubation

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Forgeron des futurs Un salon de l'emploi connecte les entreprises chinoises en Afrique du sud avec les chercheurs d'emiploi locaux

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中国与非洲（法文版） 2024年第5期16卷 40-41页

作者： ni YANsHUO 不详

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Heterogeneous bimetallic oxides/phosphides nanorod with upshifted d band center for efficient overall water splitting

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Chinese Chemical Letters 2024年第9期35卷 414-420页

作者： Ji Chen Yifan Zhao shuwen Zhao Hua Zhang Youyu Long Lingfeng Yang Min Xi Zitao ni Yao Zhou Anran Chen school of Materials and Energy Yunnan UniversityKunming 650091China school of Engineering The University of EdinburghSouth BridgeEdinburgh EH89YLUnited Kingdom Electron Microscopy Center Yunnan UniversityKunming 650091China school of Internet of Things Engineering Jiangnan UniversityWuxi 214122China

Electrocatalytic water splitting is the most directly available route to generate renewable and sustainable ***,we report the design of a composite material in which arrays of square pillar-like niMoO4nanorods coated with N,P-doped carbon layers are uniformly contained in numerous nested nanoparticle *** catalysts have superior catalytic activity,requiring only 59 mV and 187 mV for HER and OER to attain a current density of 10 mA/cm^(2),*** assembled two-electrode electrolytic cell required a voltage of 1.48 V to reach 10 mA/cm^(2),along with excellent long-term *** calculations reveal that electrons aggregate and redistribute at the heterogeneous interface,with the d-band centers of the ni and Fe atoms being positively shifted compared to the Fermi level,effectively optimizing the adsorption of intermediates and reducing the Gibbs free energy,thus accelerating the catalytic ***,an integrated solar-driven water-splitting system demonstrated a high and stable solar-to-hydrogen efficiency of 18.20%.This work provides new possibilities for developing non-precious metal-based bifunctional electrocatalysts for large-scale water splitting applications.

关键词： Hydrogen evolution reaction Bimetallic oxides Bimetallic phosphides Overall water splitting solar-to-hydrogen efficiency

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Vitamin d and selenium for type 2 diabetes mellitus with Hashimoto’s thyroiditis:dosage and duration insights

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World Journal of diabetes 2024年第8期15卷 1824-1828页

作者： Yun-Feng Yu Xue-Li shangguan dan-ni Tan Li-Na Qin Rong Yu school of Traditional Chinese Medicine Hunan University of Chinese MedicineChangsha 410208Hunan ProvinceChina

This letter discusses the publication by Feng et ***,selenium,and vitamin d are closely associated with thyroid hormone production in humans;however,the efficacy of selenium and vitamin d supplementation for type 2 diabetes mellitus(T2dM)patients with Hashimoto’s thyroiditis(HT)remains *** the retrospective study we discuss herein,the authors highlighted significant improvements in thyroid function,thyroid antibodies,blood glucose,and blood lipid in T2dM patients with HT following addition of vitamin d and selenium to their antidiabetic regimens,underscoring the value of these *** team is currently engaged in research exploring the relationship between micronutrients and HT,and we have obtained invaluable insights from the aforementioned *** on this research and current literature,we recommend a regimen of 4000 IU/day of vitamin d and 100-200μg/day of selenium for over three months to six months for patients with HT,particularly for those with concurrent T2dM.

关键词： Vitamin d selenium Type 2 diabetes mellitus Hashimoto’s thyroiditis dosage duration

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Flexible ultra-thin super-resolution endoscopy

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science China(Physics,Mechanics & Astronomy) 2024年第3期67卷 171-172页

作者： George s.d.Gordon department of Electrical and Electronic Engineering University of NottinghamNottingham NG7 2RDUK

In recent years, multimode fiber(MMF) has become an important tool for high-resolution endoscopic imaging in narrow channels(e.g., in the brain via needles or inside blood vessels) due to its high mode density and fine diameter, typically stacle to widespread deployment in applications is that realistic perturbations, including bending, twisting and changes in temperature, cause unacceptable image degradation.

关键词： fiber resolution typically

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Theoretical Modeling and surface Roughness Prediction of Microtextured surfaces in Ultrasonic Vibration-Assisted Milling

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Chinese Journal of Mechanical Engineering 2024年第2期37卷 163-183页

作者： Chenbing ni Junjie Zhu Youqiang Wang dejian Liu Xuezhao Wang Lida Zhu school of Mechanical and Automotive Engineering Qingdao University of TechnologyQingdao 266525China school of Mechanical Engineering and Automation Northeastern UniversityShenyang 110819China

Textured surfaces with certain micro/nano structures have been proven to possess some advanced functions,such as reducing friction,improving wear and increasing *** prediction of micro/nano surface textures is of great significance for the design,fabrication and application of functional textured *** this paper,based on the kinematic analysis of cutter teeth,the discretization of ultrasonic machining process,transformation method of coordinate systems and the cubic spline data interpolation,an integrated theoretical model was established to characterize the distribution and geometric features of micro textures on the surfaces machined by different types of ultrasonic vibration-assisted milling(UVAM).Based on the theoretical model,the effect of key process parameters(vibration directions,vibration dimensions,cutting parameters and vibration parameters)on tool trajectories and microtextured surface morphology in UVAM is ***,the effect of phase difference on the elliptical shape in 2d/3d ultrasonic elliptical vibration-assisted milling(UEVAM)was *** to conventional numerical models,the method of the cubic spline data interpolation is applied to the simulation of microtextured surface morphology in UVAM,which is more suitable for characterizing the morphological features of microtextured surfaces than traditional methods due to the presence of numerous micro *** prediction of surface roughness indicates that the magnitude of ultrasonic amplitude in z-direction should be strictly limited in 1d rotary UVAM,2d and 3d UEVAM due to the unfavorable effect of axial ultrasonic vibration on the surface *** study can provide theoretical guidance for the design and fabrication of microtextured surfaces in UVAM.

关键词： Theoretical modeling Microtextured surface Ultrasonic vibration-assisted milling Cubic spline interpolation surface roughness

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