A novel compact printed ultrawideband (UWB) slot antenna for MIMO/diversity applications is presented in this letter. The consists of two modified coplanar waveguides (CPWs) feeding staircase-shaped radiating elements orthogonal radiation patterns, where a rectangle stub placed at 45° between the CPW to ensure high isolations. By etching split-ring resonator (SRR) slots on radiators respectively, band-notched property achieved. Results show that meets 10-dB impedance bandwidth and 15 dB...

In this work, we report that superhydrophobic coatings can be prepared by a simple spray-coating technique using readily available materials such as polydimethylsiloxane (PDMS) and hydrophilic hydrophobic SiO

Catalysis has been regarded as an effective strategy to mitigate sluggish reaction kinetics and serious shuttle effect of Li-S batteries. Herein, a spherical structure consists ultrathin layered Ti3C2Tx-TiN heterostructures (MX-TiN) through in-situ nitridation method is reported. Through controllable nitridation, highly conductive TiN layer grew on the surface close coupled with interior MXene form unique 2D heterostructures. The heterostructure only several nanometers in thickness enables...

Abstract The application of solid polymer electrolytes (SPEs) in all‐solid‐state(ASS) batteries is hindered by lower Li + ‐conductivity and narrower electrochemical window. Here, three families ester‐based F‐modified SPEs poly‐carbonate (PCE), poly‐oxalate (POE) poly‐malonate (PME) were investigated. these prepared from pentanediol are all higher than the counterparts made butanediol, owing to enhanced asymmetry flexibility. Because stronger chelating coordination with , PME POE around 10 5...

Abstract Trace N, N‐dimethylformamide(DMF) containing composite polymer electrolytes (CPEs) has attracted much attention owing to the dramatically increased Li + ‐conductivity. But amount of DMF is critical and needs be clarified for interfacial stability, since easily reduced by Li‐metal. Herein, influences in poly(ethylene oxide) (PEO) poly(vinylidene fluoride) (PVDF) based CPEs are studied on ‐conductivity stability. In PEO‐based CPEs, a stronger interaction lithium...

Zn-Mn alloys are considered promising biodegradable metals for orthopedic applications due to their large elongation and favorable osteogenicity. However, the corrosion rate of could be improved meet degradation requirement implants. In this study, a Zn-1.5Mn alloy was prepared via high-pressure solid-solution (HPSS) treatment at 5 GPa 380 °C 1 h cast ingots. Microstructural evaluation revealed HPSS caused phase transition from ζ-MnZn13 an ε-MnZn3 phase. The electrode potential difference...

Abstract The first example of cobalt‐catalyzed oxidative C−H/C−H cross‐coupling between two heteroarenes is reported, which exhibits a broad substrate scope and high tolerance level for sensitive functional groups. When the amount Co(OAc) 2 ⋅4 H O reduced from 6.0 to 0.5 mol %, an excellent yield still obtained at elevated temperature with prolonged reaction time. method can be extended arene heteroarene. It worth noting that Ag CO 3 oxidant renewable. Preliminary mechanistic studies by...

Superhydrophobic surface has potential applications in various fields due to its excellent water repellency. In particular, fluorine-free superhydrophobic film attracted extensive attentions. this study, an eco-friendly and rewritable coating is successfully prepared by a simple spray-coating method. Hydrophilic silica nanoparticles are immobilized on substrate water-soluble polyvinyl alcohol (PVA), then the further modified polydimethylsiloxane (PDMS) obtain coating. The contact angle of...

Abstract NiS 1.23 Se 0.77 nanosheets closely attached to the internal surface of hollow mesoporous carbon sphere (HMCS) form a embedded in HMCS (NSSNs@HMCS) composite as anode sodium ion batteries (SIBs) is reported by facile synthesis route. The exhibits superior reversible capacity (520 mAh g −1 at 0.1 A ) , impressive coulombic efficiency (CE) up 95.3%, high rate (353 5.0 ), excellent retention current density (95.6%), and initial (ICE) (95.1%). Firstly, highest ICE for 2 /NiSe ‐based can...

Polymerized-dioxolane(P-DOL) is of potential as a solid-polymer-electrolyte(SPE) due to its high Li+ -conductivity, good compatibility with Li-metal and desired preparation method in situ polymerization cells. In this study, SnF2 was demonstrated not only be an efficient catalyst for the DOL at room temperature, but also effective additive improving interfacial wettability suppressing dendrite through reaction formation LiF/Lix Sn based composite solid electrolyte interlayer(SEI). Using...

It is still a challenging task to perform the semantic segmentation with high accuracy due complexity of real picture scenes. Many methods based on traditional deep learning insufficiently captured and appearance information images, which put limit their generality robustness for various application Thus, in this paper, we proposed novel strategy that reformulated popularly used convolution operation multi-layer convolutional sparse coding block method ease aforementioned deficiency. To...

Smoking is a well-established risk factor for kidney cancer. Analyzing the latest global spatio-temporal trends in cancer burden attributable to smoking critical informing effective public health policies. Using data from 2021 GBD database, we examined deaths, disability-adjusted life years (DALYs), and age-standardized rate (ASR) of across global, regional, national levels. Trends ASRs were assessed through estimated annual percentage change (EAPC). We conducted cross-country analysis...

A novel compact wide-slot ultrawideband (UWB) antenna with dual band-notched characteristics is presented. The consists of an inverted U-shaped slot on the ground plane and a radiation patch similar to that fed by 50-Ω microstrip line. By etching C-shaped extruding L-shaped stub from plane, properties in WiMAX (3.4-3.69 GHz) WLAN (5.15-5.825 are achieved. proposed has size 20×27 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> operates...

We have conducted a thorough study on extracellular biosynthesis of silver nanoparticles (AgNPs) by halotolerant bacterium Bacillus endophyticus SCU-L, which was identified 16S rRNA gene sequencing analysis. This strain selected during an ongoing research programme aimed at finding novel biological method for green nanosynthetic routes using the extremophiles in unexplored hypersaline habitats. The biosynthesized AgNPs were characterized and analyzed with UV-vis spectroscopy, Fourier...

SnS, is a promising anode material for lithium ion batteries (LIBs) and sodium (SIBs), however, undergoes poor cyclic lifespan due to its huge volume changes bad electroconductivity. Here, modified CVD method used directly grow graphene-like carbon film on the surface of SnS nanosheet arrays which are supported by Co-, N-modified porous fibers (CCF@SnS@G). In strategy, confined into integrated matrix containing film, perform greatly improved electrochemical performance. situ TEM experiments...

Object detection is a core part of an intelligent surveillance system and fundamental algorithm in the field identity identification, which great practical importance. Since YOLO series algorithms have good results terms accuracy speed, each subsequent version been surpassing. Thus, this paper, it carries out experiments on three versions popular models such as yolov3, yolov4, yolov5 (yolov5l, yolov5m, yolov5s, yolov5x). The performance model analyzed summarized by training predicting public...

We report a new material and structural configuration for lithium-ion batteries consisting of cobalt nickel nitride coated by thin carbon layer anchoring on nitrogen-doped nanotubes. The anode delivers excellent lithium storage properties.