Replacement of precious noble metal catalysts with low-cost, non-noble heterogeneous for chemoselective reduction and reductive coupling nitro compounds holds tremendous promise the clean synthesis nitrogen-containing chemicals. We report a robust cobalt-nitrogen/carbon (Co-N x /C-800-AT) catalyst into amines their derivates. The Co-N /C-800-AT was prepared by pyrolysis cobalt phthalocyanine-silica colloid composites subsequent removal silica template nanoparticles. showed extremely high...

Selective hydrogenolysis of the Caryl-O bonds in lignin is a key strategy for generation fuels and chemical feedstocks from biomass. Currently, has been mainly conducted using hydrogen, which flammable not sustainable or economical. Herein, an external hydrogen-free process aryl ethers models dioxasolv over nickel nanoparticles supported on Al2O3, reported. Kinetic studies reveal that transfer activity three model compounds decreased following order: benzyl phenyl ether (α-O-4),...

The conversion of lignin into value-added chemicals is one the important ways for sustainable development. Herein, phytic acid, a biomass-derived chemical, was used as phosphorus source and pore former to synthesize AlPyOx support. After loading Ni, Ni/AlPyOx catalysts were found be highly active in catalytic model compounds high-value-added under mild conditions. benzyl phenyl ether (α-O-4 compound) could completely converted toluene phenol with near-equivalent selectivity at 30 °C 3 MPa...

The construction of efficient enzyme mimetics for the hydrolysis peptide bonds in proteins is challenging due to high stability and importance proteases biology industry. Metal-organic frameworks (MOFs) consisting infinite crystalline lattices with metal clusters organic linkers may provide opportunities protease mimic which has remained unknown. Herein, we report that Cu2(C9H3O6)4/3 MOF (which well known as HKUST-1 denoted Cu-MOF here), possesses an intrinsic mimicking activity similar...

The requirement of a large number samplings limits the performance ghost imaging for moving objects. Conventionally, tracking and objects are done independently; thus, sequential clear images target during its evolution required. In this Letter, we propose to obtain displacement object via cross correlation between unclear rough images. Then, high-quality image can be reconstructed gradually evolution. Our method works well translating rotating

Abstract A new method has been developed for the deoxygenation of vanillin to produce 2‐methoxy‐4‐methylphenol (MMP) as a promising liquid fuel over heterogeneous non‐noble metal catalyst. Cobalt nanoparticles supported on nitrogen‐doped carbon (Co/N‐C‐600) exhibit high activity and stability into MMP under mild conditions (150 °C, 10 bar H 2 ). Nearly quantitative yield is obtained in isopropanol after 8 h at 150 °C pressure. According distribution products with time, mainly proceeds...

Developing new heterogeneous non-noble metal catalysts to replace noble-metal in organic transformations is of high importance modern synthetic chemistry. Herein, nitrogen-doped carbon embedded Co (abbreviated as Co@CN-T-AT, which T represents the pyrolysis temperature, AT acid-leaching process) were prepared through simple graphene oxide-supported cobalt-based zeolitic imidazolate-frameworks, followed by process. The Co@CN-600-AT catalyst demonstrated highest catalytic activity among...

In this study, the mesporous SBA-15 was prepared and used to graft biimidazole groups, which were anchor Ru3+ give rise a new ruthenium catalyst (SBA-15-Biimidazole-Ru). The structure of SBA-15-Biimidazole-Ru well characterized for aerobic oxidation 5-hydroxymethylfurfural (HMF) into 2,5-diformylfuran (DFF). Several important parameters studied found that reaction solvent oxygen pressure showed crucial role in activity as-prepared catalyst. HMF conversion 96.9% DFF yield 88.7% achieved after...

Ghost imaging (GI) usually requires a large number of samplings, which limit the performance especially when dealing with moving objects. We investigated deep learning method for GI, and results show that it can enhance quality images sampling rate even down to 3.7%. With convolutional denoising auto-encoder network trained numerical data, blurry from few samplings be denoised. Then those outputs are used reconstruct both trajectory clear image object via cross-correlation based required...

The application of deep learning has allowed significant progress in medical imaging. However, few studies have focused on the diagnosis benign and malignant spinal tumors using imaging age information at patient level. This study proposes a multi-model weighted fusion framework (WFF) for based magnetic resonance (MRI) images information.The proposed WFF included tumor detection model, sequence classification statistic module sagittal MRI sequences obtained from 585 patients with (270...

Simultaneously tracking and imaging moving objects has been an open problem, due to the requirement on a large amount of information low photon flux during very moment that object can be taken as stationary. Information decomposed into motion centroid image object. The far less than for imaging. Therefore, we propose solve problem by segregating. That is, obtain trajectory gradually achieve process. As example, unify within single system, based ghost with four-quadrant detector. differential...

A nitrogen-doped carbon modified nickel catalyst was used for the hydrogenation of levulinic acid to γ-valerolactone under ambient hydrogen pressure. The showed excellent activity in various solvents and could be recycled at least six runs.

Retrospective study. To investigate the impact of preoperative C2 slope (C2S) on change in sagittal vertical axis (SVA) and postoperative cervical imbalance (CSI) after laminoplasty (LP). Consecutive patients who underwent LP between January 2015 2022 with a minimum 12-month follow-up were reviewed. The clinical variables radiographic measurements assessed. Patients divided into improvement (ΔcSVA ≤ -10 mm), stable (-10 mm ΔcSVA <10 CSI groups (ΔcSVA≥10 mm). Correlation analysis was...

In the domain of remote sensing image small target detection, challenges such as difficulties in extracting features targets, complex backgrounds that easily lead to confusion with and high computational complexity significant resource consumption are prevalent. We propose a lightweight detection algorithm for images combines GSConv PConv, named LI-YOLOv8. Using YOLOv8n baseline algorithm, activation function SiLU CBS at backbone network’s SPPF is replaced ReLU, which reduces...

The application of earth-abundant transition metal catalysts in the mild and selective synthesis secondary amines <italic>via</italic> reductive amination method is very challenging.

With the recent advances of neural models and natural language processing, automatic generation classical Chinese poetry has drawn significant attention due to its artistic cultural value. Previous works mainly focus on generating given keywords or other text information, while visual inspirations for have been rarely explored. Generating from images is much more challenging than text, since contain very rich information which cannot be described completely using several keywords, a good...

Towards improvements in the quality of reconstructed images, errors point spread function a ghost imaging system caused by limited number samplings and imperfect illumination are discussed. We propose an algorithm normalizing with second-order coherence field, which can be reduced, such as non-uniform spatial distribution average intensity, spatially varying profile degree coherence, or power fluctuation.

A highly regioselective protocol for intermolecular thiocyanation-amination of alkynes by N-thiocyano-dibenzenesulfonimide (NTSI) as the SCN and nitrogen sources has been developed. C–S bond C–N are simultaneously constructed in only one step. The reaction under simple mild conditions features a broad substrate scope, atom economy, high yields (up to 94%), excellent functional group tolerance.

Research towards practical applications of ghost imaging attracts more and attention in recent years. Signal-to-noise ratio (SNR) bucket results thus quality images can be greatly affected by environmental noise, such as strong background light. We introduce temporal cross-correlation into typical to improve SNR value, taking profile illumination pulses a prior information. Experimental at sunny noontime verified our method, with the improved for object distance 1.3 km . also show...

Study Design. A retrospective diagnostic test study. Objective. To establish quantitative fusion criteria for ACCF. Summary of Background Data. Currently, the after ACCF remains controversial. Evaluation techniques such as observation continuous bony trabeculae across site, were qualitative and conducted by naked eyes, limiting its accuracy. Dynamic indicators interspinous motion (ISM), have been successfully utilized in anterior cervical discectomy (ACDF) evaluating detecting...