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Predict the evolution of mechanical property of Al-Li alloys in a marine environment

Defence Technology（防务技术） 2024年第1期31卷 557-566页

作者： wei Li Lin Xiang Guang Wu Hongli Si Jinyan Chen Yiming Jin Yan Su Jianquan tao Chunyang Huang State Key Laboratory of Explosion Science and Technology Beijing Institute of TechnologyBeijing100036China Chongqing Innovation Center Beijing Institute of TechnologyChongqing400044China First Research Institute of the Ministry of Public Security for PR China Beijing100036China Southwest Technology and Engineering Research Institute Chongqing400039China

The ocean is one of the essential fields of national defense in the future,and more and more attention is paid to the lightweight research of Marine equipment and *** study it is to develop a Machine learning(ML)-based prediction method to study the evolution of the mechanical properties of Al-Li alloys in the marine *** obtained the mechanical properties of Al-Li alloy samples under uniaxial tensile deformation at different exposure times through Marine exposure *** obtained the strain evolution by digital image correlation(DIC).The strain field images are voxelized using 2D-Convolutional Neural Networks(CNN)autoencoders as input data for Long Short-Term Memory(LSTM)neural ***,the output data of LSTM neural networks combined with corrosion features were input into the Back Propagation(BP)neural network to predict the mechanical properties of Al-Li *** main conclusions are as follows:*** variation law of mechanical properties of2297-T8 in the Marine atmosphere is *** the increase in outdoor exposure test time,the tensile elastic model of 2297-T8 changes slowly,within 10%,and the tensile yield stress changes significantly,with a maximum attenuation of 23.6%.*** prediction model can predict the strain evolution and mechanical response simultaneously with an error of less than 5%.*** study shows that a CNN/LSTM system based on machine learning can be built to capture the corrosion characteristics of Marine exposure *** results show that the relationship between corrosion characteristics and mechanical response can be predicted without considering the microstructure evolution of metal materials.

关键词： Marine environment Al-Li alloy Machine learning Corrosion

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Efficient recovery of tungsten from scheelite concentrates using a sulfur-phosphorus mixed acid leaching system

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Tungsten 2024年第4期6卷 821-832页

作者： Jiang-tao Li Li-Li Gao Zhong-wei Zhao Xu-Heng Liu Xing-Yu Chen School of Metallurgy and Environment Central South University Key Laboratory of Hunan Province for Metallurgy and Material Processing of Rare Metals

In recent years,a new process for leaching scheelite concentrates with sulfur-phosphorus mixed acid has been successfully *** process suffers from the elimination of the retarding effect of calcium sulfate,the selective extraction of tungsten from the H3PW12O40-H2SO4-H3PO4mixture solution,and the removal of introduced ***,in this paper,we investigated the inhibition measures of a calcium sulfate-blocking membrane,the selective extraction of tungsten by ion exchange,and the removal of phosphorus by the magnesium ammonium salt *** results showed that the addition of calcium sulfate whisker seeds and a higher H3PO4concentration inhibited spontaneous diffuse nucleation,promoted crystal growth,and avoided the formation of a dense blocking *** 98 wt.% of the scheelite concentrate was digested by *** selective adsorption of PW12O403-was realized using D301 resin,and the extraction efficiency of tungsten exceeded 99.9%.After desorption with ammonia water,PW12O403-was depolymerized into WO42-and PO43-.99.9 wt.% of phosphorus was removed in the form of MgNH4PO4by the magnesium ammonium salt method,and the residual phosphorus concentration in the solution was lower than 10 mg·*** purification,the highest-grade ammonium paratungstate product was prepared by evaporative crystallization.

关键词： Calcium sulfate Ion exchange Scheelite concentrates Sulfur-phosphorus mixed acid Tungsten

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Vein visualization enhancement by dual-wavelength phase-locked denoising technology

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Journal of Innovative Optical Health Sciences 2024年第3期17卷 73-83页

作者： Lihua Ruan Zhiqin Yin Shibing Zhou weibo Zheng wei Lu tao Zhang Shaowei wang Shanghai Institute of Technical Physics Chinese Academy of Sciences Shanghai 200083P.R.China State Key Laboratory of Infrared Physics Shanghai Institute of Technical PhysicsChinese Academy of SciencesShanghai 200083P.R.China Shanghai Engineering Research Center of Energy-Saving Coatings Shanghai 200083 P.R.China University of Chinese Academy of Sciences Beijing 100049P.R.China Shanghai Tech University Shanghai 201210P.R.China School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210P.R.China School of Information Science and Technology ShanghaiTech UniversityShanghai 201210China

Visual near-infrared imaging equipment has broad applications in various fields such as venipuncture,facial injections,and safety verification due to its noncontact,compact,and portable ***,most studies utilize near-infrared single-wavelength for image acquisition of ***,many substances in the skin,including water,protein,and melanin can create significant background noise,which hinders accurate *** this paper,we developed a dual-wavelength imaging system with phase-locked denoising technology to acquire vein *** signals in the effective region are compared by using the absorption valley and peak of hemoglobin at 700nm and 940nm,*** phase-locked denoising algorithm is applied to decrease the noise and interference of complex surroundings from the *** imaging results of the vein are successfully extracted in complex noise *** is demonstrated that the denoising effect on hand veins imaging can be improved with 57.3%by using our dual-wavelength phase-locked denoising ***,this work proposes a novel approach for venous imaging with dual-wavelengths and phase-locked denoising algorithm to extract venous imaging results in complex noisy environment better.

关键词： Dual-wavelength phase-locked denoising vein visualization enhancement.

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Relationship between preoperative psychological stress and shortterm prognosis in elderly patients with femoral neck fracture

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World Journal of Psychiatry 2024年第6期14卷 838-847页

作者： Wen-Hui Fu Zhi-Long Hu Yuan-Jun Liao Ri-Jiang Chen Jian-Bin Qiu Wu-Tang Que Wan-tao wang wei-Hua Li wei-Bin Lan Department of Orthopedics Longyan First Affiliated Hospital of Fujian Medical UniversityLongyan 361000Fujian ProvinceChina

BACKGROUND Older adults are at high risk of femoral neck fractures(FNFs).Elderly patients face and adapt to significant psychological burdens,resulting in different degrees of psychological stress *** hip replacement is the preferred treatment for FNF in elderly patients;however,some patients have poor postoperative prognoses,and the underlying mechanism is *** speculated that the postoperative prognosis of elderly patients with FNF may be related to preoperative psychological *** To explore the relationship between preoperative psychological stress and the short-term prognosis of elderly patients with *** In this retrospective analysis,the baseline data,preoperative 90-item Symptom Checklist score,and Harris score within 6 months of surgery of 120 elderly patients with FNF who underwent total hip arthroplasty were *** analyzed the indicators of poor short-term postoperative prognosis and the ability of the indicators to predict poor prognosis and compared the correlation between the indicators and the Harris *** Anxiety,depression,garden classification of FNF,cause of fracture,FNF reduction quality,and length of hospital stay were independent influencing factors for poor short-term postoperative prognoses in elderly patients with FNF(P<0.05).The areas under the curve for anxiety,depression,and length of hospital stay were 0.742,0.854,and 0.749,*** sensitivities of anxiety,depression,garden classification of FNF,and prediction of the cause of fracture were 0.857,0.786,0.821,and 0.821,*** specificities of depression,FNF quality reduction,and length of hospital stay were the highest at 0.880,0.783,and 0.761,***,depression,and somatization scores correlated moderately with Harris scores(r=-0.523,-0.625,and-0.554;all P<0.001).CONCLUSION Preoperative anxiety,depression,and somatization are correlated with poor short-term prognosis in elderly patients with FNF and warrant consid

关键词： Psychological stress Old age Femoral neck fracture Hip replacement Short-term prognosis Correlation

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Research on the solid particle erosion wear of pipe steel for hydraulic fracturing based on experiments and numerical simulations

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Petroleum Science 2024年第4期21卷 2779-2792页

作者： Si-Qi Yang Jian-Chun Fan Ming-tao Liu De-Ning Li Jun-Liang Li Li-Hong Han Jian-Jun wang Shang-Yu Yang Si-wei Dai Lai-Bin Zhang State Key Laboratory of Oil and Gas Equipment CNPC Tubular Goods Research Institute Key Laboratory of Oil and Gas Safety and Emergency Technology China University of Petroleum Oil Production Technology Research Institute of Liaohe Oilfield Company Tianjin Gas Storage Branch PetroChina Dagang Oilfield Company Petroleum Production Engineering Research Institute Daqing Oilfield Company

Erosion wear is a common failure mode in the oil and gas industry. In the hydraulic fracturing, the fracturing pipes are not only in high-pressure working environment, but also suffer from the impact of the high-speed solid particles in the fracturing fluid. Beneath such complex conditions, the vulnerable components of the pipe system are prone to perforation or even burst accidents, which has become one of the most serious risks at the fracturing site. Unfortunately, it is not yet fully understood the erosion mechanism of pipe steel for hydraulic fracturing. Therefore, this article provides a detailed analysis of the erosion behavior of fracturing pipes under complex working conditions based on experiments and numerical simulations. Firstly, we conducted erosion experiments on AISI 4135 steel for fracturing pipes to investigate the erosion characteristics of the material. The effects of impact angle, flow velocity and applied stress on erosion wear were comprehensively considered. Then a particle impact dynamic model of erosion wear was developed based on the experimental parameters, and the evolution process of particle erosion under different impact angles, impact velocities and applied stress was analyzed. By combining the erosion characteristics, the micro-structure of the eroded area, and the micro-mechanics of erosion damage, the erosion mechanism of pipe steel under fracturing conditions was studied in detail for the first time. Under high-pressure operating conditions, it was demonstrated through experiments and numerical simulations that the size of the micro-defects in the eroded area increased as the applied stress increased, resulting in more severe erosion wear of fracturing pipes.

关键词： Erosion wear Applied stress Particle impact dynamics Erosion mechanism

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Studying the variable energy band structure for energy storage materials in charge/discharge process

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Chinese Chemical Letters 2024年第2期35卷 584-589页

作者： Xuancheng Chen Yu Huan Ningqiang Sun Yuanhui Su Xuesong Shen Guoqing Li Jiaqi Zhang tao wei University of Jinan Ji'nan 250022China weichai Power Co. Ltd.Weifang 261061China

So far,a clear understanding about the relationship of variable energy band structure with the corresponding charge-discharge process of energy storage materials is still ***,using optical spectroscopy(red-green-blue(RGB)value,reflectivity,transmittance,UV-vis,XPS,UPS)to studyα-Co(OH)_(2) electrode working in KOH electrolyte as the research object,we provide direct experimental evidence that:(1)The intercalation of OH-ions will reduce the valence/conduction band(VB and CB)and band gap energy(Eg)values;(2)The deintercalation of OH-ions corresponds with the reversion of VB,CB and E_(g) to the initial values;(3)The color of Co(OH)_(2) electrode also exhibit regular variations in RGB value during the charge-discharge process.

关键词： Variable energy band structure Energy storage materials Charge-discharge process Optical spectroscopy Supercapacitors

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Expression and significant roles of the long non-coding RNA CASC19/miR-491-5p/HMGA2 axis in the development of gastric cancer

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World Journal of Gastrointestinal Oncology 2024年第8期16卷 3559-3584页

作者： Li-Xiang Zhang Pan-Quan Luo Zhi-Jian wei A-Man Xu tao Guo Department of Gastroenterology The First Affiliated Hospital of Anhui Medical UniversityHefei 230031Anhui ProvinceChina Anhui Provincial Key Laboratory of Digestive Disease Hefei 230031Anhui ProvinceChina Department of General Surgery The First Affiliated Hospital of Anhui Medical UniversityHefei 230031Anhui ProvinceChina Anhui Public Health Clinical Center Hefei 230000Anhui ProvinceChina

BACKGROUND Gastric cancer(GC)is a common malignant tumor,long non-coding RNA and microRNA(miRNA)are important regulators that affect tumor proliferation,metastasis and chemotherapy resistance,and thus participate in tumor ***19 is a new bio-marker which can promote tumor invasion and ***,the mechanism by which CASC19 affects the progression of GC through miRNA is not *** To explore the role of the CASC19/miR-491-5p/HMGA2 regulatory axis in *** To explore the expression and prognosis of CASC19 in GC through clinical samples,and investigate the effects of inhibiting CASC19 on the proliferation,migration,invasion and other functions of GC cells through cell counting Kit-8(CCK-8),ethynyldeoxyuridine,Wound healing assay,Transwell,Western blot and flow cytometry *** effect of miR-491-5p and HMGA2 in GC were also *** regulatory relationship between CASC19 and miR-491-5p,miR-491-5p and HMGA2 were validated through Dual-luciferase reporter gene assay and reverse transcription *** CCK-8,Transwell,Wound healing assay,flow cytometry and animal experiments verify the role of CASC19/miR-491-5p/HMGA2 regulatory *** The expression level of CASC19 is related to the T stage,N stage,and tumor size of *** of the expression of CASC19 can inhibit the ability of proliferation,migration,invasion and EMT conversion of GC cells,and knocking down the expression of CASC19 can promote the apoptosis of GC *** the expression of miR-491-5p can inhibit the proliferation of GC cells,miR-491-5p mimics can inhibit EMT conversion,and promote the apoptosis of GC cells,while decreasing the expression of miR-491-5p can promote the proliferation and EMT conversion and inhibit the apoptosis of GC *** expression of HMGA2 in GC tissues is higher than that in adjacent *** the same time,the expression level of HMGA2 is related to the N and T stages of the *** the level of HMGA2 can pr

关键词： Gastric cancer Long non-coding RNA CASC19 miR-491-5p HMGA2 Prognosis

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Sono-photocatalytic amination of quinoxalin-2(1H)-ones with aliphatic amines

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Chinese Chemical Letters 2024年第10期35卷 295-298页

作者： Wen-tao Ouyang Jun Jiang Yan-Fang Jiang Ting Li Yuan-Yuan Liu Hong-tao Ji Li-Juan Ou wei-Min He School of Chemistry and Chemical Engineering University of South China National Engineering Research Center of Low-Carbon Processing and Utilization of Forest Biomass Nanjing Forestry University School of Materials Science and Engineering Hunan Institute of Technology

The first example of sono-photocatalytic bond formation was reported. With both visible light and ultrasound wave as the energy, various 3-aminoquinoxalin-2(1H)-ones were efficiently obtained with good functional group tolerance in the absence of any additive or external photocatalyst. Compared with the conventional photocatalysis, sono-photocatalysis not only dramatically improved the reaction rates and yields, but also reduced energy consumption.

关键词： Aliphatic amines Amination External photocatalyst-free Quinoxalin-2(1H)-ones Sono-photocatalysis

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Enhanced organic degradation and microbial community cooperation by inoculating Bacillus licheniformis in low temperature composting

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Journal of Environmental Sciences 2024年第9期143卷 189-200页

作者： Jing Su Kaiyun Zhou Wenjie Chen Shaoqi Xu Ziwei Feng Yuan Chang Xiaoyan Ding Yi Zheng Xingling tao Ake Zhang Yue wang Ji Li Guochun Ding Yuquan wei Nanjing Institute of Environmental Sciences Ministry of Ecology and EnvironmentNanjing 210042China College of Resources and Environmental Science Beijing Key Laboratory of Biodiversity and Organic FarmingChina Agricultural UniversityBeijing 100193China Organic Recycling Institute(Suzhou)of China Agricultural University Wuzhong DistrictSuzhou 215128China Fuyang Academy of Agricultural Sciences Fuyang 236065China

Microbial activity and interaction are the important driving factors in the start-up phase of food waste composting at low *** aim of this study was to explore the effect of inoculating Bacillus licheniformis on the degradation of organic components and the potential microbe-driven mechanism from the aspects of organic matter degradation,enzyme activity,microbial community interaction,and microbial metabolic *** results showed that after inoculating ***,temperature increased to 47.8℃ on day2,and the degradation of readily degraded carbohydrates(RDC)increased by 31.2%,and the bioheat production increased by 16.5%.There was an obvious enhancement of extracellular enzymes activities after inoculation,especially amylase activity,which increased by 7.68 times on day *** inoculated *** colonized in composting as key genus in the start-up *** network analysis and Mantel test indicated that inoculation drove the cooperation between microbial network modules who were responsible for various organic components(RDC,lipid,protein,and lignocellulose)degradation in the start-up *** function prediction suggested that carbohydrate metabolisms including starch and sucrose metabolism,glycolysis/gluconeogenesis,pyruvate metabolism,etc.,were improved by increasing the abundance of related functional genes after *** conclusion,inoculating *** accelerated organic degradation by driving the cooperation between microbial network modules and enhancing microbial metabolism in the start-up phase of composting.

关键词： Microbial agent Organic matter degradation Microbial interaction Food waste Low temperature composting

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Small modifications of endo-functionalized cavities lead to large changes in molecular interaction in water

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Science China Chemistry 2024年

作者： Song-Meng wang Hao Nian Yan-Fang wang Li-Shuo Zheng Yu-tao Zheng Yi-wei Dong Li-Ping Huang Xiao-Ping wang wei Jiang Liu-Pan Yang Department of Chemistry Southern University of Science and Technology School of Chemistry and Pharmaceutical Sciences State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources Guangxi Normal University School of Pharmaceutical Science Hengyang Medical School University of South China

Studying molecular recognition in aqueous environments is crucial for understanding biological processes. Herein, we present a series of N-doped endo-functionalized anthracene-based cavities by introducing inward-directed pyridine units. The subtle modifications can significantly affect the binding properties of these receptors, which is similar to the mutations in biological systems. Combining theoretical calculations and molecular recognition experiments demonstrated that these “mutations” have an impact on the hydrophobicity and charge distribution of the hosts, consequently significantly influencing molecular *** is crucial for understanding the intricate mechanisms of molecular-level interactions in biological receptors.

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