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Multi-performance evaluation of high-throughput accelerated corrosion test for high-strength low-alloy 921A steel

Journal of Iron and Steel Research International 2024年第5期31卷 1260-1278页

作者： Cong-cong Du Ming-hua Qin Zhan-fang Wu Dong-ling li Lei Zhao xiang-yang li Hai-zhou Wang Beijing Advanced Innovation Center for Materials Genome Engineering National Center for Materials Service SafetyUniversity of Science and Technology BeijingBeijing100083China China Iron and Steel Research Institute Group Co. Ltd.Beijing100081China Beijing Advanced Innovation Center for Materials Genome Engineering Central Iron and Steel Research InstituteBeijing100081China

The corrosion behavior of high-strength low-alloy 921A steel in a simulated marine atmospheric environment was studied using a high-throughput experimental *** corrosion behavior,corrosion morphology,and corrosion products of 921A steels were analyzed using various techniques,including corrosion mass loss method,polarization curve,white-light interferometry,scanning electron microscopy,energy-dispersive spectrometry,microbeam X-ray fluorescence spectrometry,X-ray diffraction technique,and X-ray photoelectron *** test results indicated that 921A steel exhibits better corrosion resistance than Q450NQR1 steel in simulated harsh atmospheric environments,as evidenced by a lower corrosion mass loss rate throughout the corrosion *** corrosion products of both steels consisted ofα-FeOOH,Fe_(3)O_(4),andγ-FeOOH,withα-FeOOH being more prevalent in the rust layer of 921A steel than in Q450NQR1 *** inner rust layer of 921A steel also exhibited an appositional enrichment region of Cr,Ni,Mo,and V,leading to its superior corrosion resistance compared to that of Q450NQR1 *** efficacy of high-throughput accelerated corrosion experimental methods was highlighted for evaluating the corrosion resistance of steel materials in harsh environmental *** findings suggest that 921A steel exhibits better corrosion resistance compared to Q450NQR1 steel and has the potential to be more suitable in harsh marine atmospheric *** characterization of the rust layer structures and composition reveals the parallel enrichment of certain elements in the inner rust layer of 921A steel,which enhances its corrosion resistance.

关键词： Atmospheric corrosion High-throughput experimental method High-strength low-alloy steel Corrosion characteristics Rust layer Element enrichment

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Molecular mechanisms of Buqing granule for the treatment of diabetic retinopathy:Network pharmacology analysis and experimental validation

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World Journal of Diabetes 2024年第9期15卷 1942-1961页

作者： Yi-Fan yang ling Yuan xiang-yang li Qian liu Wen-Jie Jiang Tai-Qiang Jiao Jia-Qing li Meng-Yi Ye yang Niu Yi Nan Key Laboratory of Ningxia Minority Medicine Modernization Ministry of Education Ningxia Medical UniversityYinchuan 750004Ningxia Hui Autonomous RegionChina College of Pharmacy Ningxia Medical UniversityYinchuan 750004Ningxia Hui Autonomous RegionChina Traditional Chinese Medicine College Ningxia Medical UniversityYinchuan 750004Ningxia Hui Autonomous RegionChina School of Clinical Medicine Ningxia Medical UniversityYinchuan 750004Ningxia Hui Autonomous RegionChina

BACKGROUND Diabetic retinopathy(DR)is a common microvascular complication of diabetes *** blindness rate is high;therefore,finding a reasonable and safe treatment plan to prevent and control DR is ***,there are abundant and diverse research results on the treatment of DR by Chinese medicine Traditional Chinese medicine compounds are potentially advantageous for DR prevention and treatment because of its safe and effective therapeutic *** To investigate the effects of Buqing granule(BQKL)on DR and its mechanism from a systemic perspective and at the molecular level by combining network pharmacology and in vivo *** This study collected information on the drug targets of BQKL and the therapeutic targets of DR for intersecting target gene analysis and protein-protein interactions(PPI),identified various biological pathways related to DR treatment by BQKL through Gene Ontology and Kyoto Encyclopedia of Genes and Genomes enrichment analyses,and preliminarily validated the screened core targets by molecular ***,we constructed a diabetic rat model with a high-fat and high-sugar diet and intraperitoneal streptozotocin injection,and administered the appropriate drugs for 12 weeks after the model was successfully *** mass and fasting blood glucose and lipid levels were measured,and pathological changes in retinal tissue were detected by hematoxylin and eosin *** was used to detect the oxidative stress index expression in serum and retinal tissue,and immunohistochemistry,real-time quantitative reverse transcription PCR,and western blotting were used to verify the changes in the expression of core *** Six potential therapeutic targets of BQKL for DR treatment,including Caspase-3,c-Jun,TP53,AKT1,MAPK1,and MAPK3,were screened using *** analysis indicated that the MAPK signaling pathway might be the core target pathway of BQKL in DR *** docking prediction indica

关键词： Diabetic retinopathy Network pharmacology Animal models Oxidative stress Inflammatory

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Nonlinear amplitude inversion using a hybrid quantum genetic algorithm and the exact zoeppritz equation

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Petroleum Science 2022年第3期19卷 1048-1064页

作者： Ji-Wei Cheng Feng Zhang xiang-yang li College of Geophysics State Key Laboratory of Petroleum Resources and ProspectingChina University of Petroleum(Beijing)Beijing102249China British Geological Survey EdinburghUK

The amplitude versus offset/angle(AVO/AVA)inversion which recovers elastic properties of subsurface media is an essential tool in oil and gas *** general,the exact Zoeppritz equation has a relatively high accuracy in modelling the reflection ***,amplitude inversion based on it is highly nonlinear,thus,requires nonlinear inversion techniques like the genetic algorithm(GA)which has been widely applied in *** quantum genetic algorithm(QGA)is a variant of the GA that enjoys the advantages of quantum computing,such as qubits and superposition of ***,however,suffers from limitations in the areas of convergence rate and escaping local *** address these shortcomings,in this study,we propose a hybrid quantum genetic algorithm(HQGA)that combines a self-adaptive rotating strategy,and operations of quantum mutation and *** the selfadaptive rotating strategy improves the flexibility and efficiency of a quantum rotating gate,the operations of quantum mutation and catastrophe enhance the local and global search abilities,*** the exact Zoeppritz equation,the HQGA was applied to both synthetic and field seismic data inversion and the results were compared to those of the GA and QGA.A number of the synthetic tests show that the HQGA requires fewer searches to converge to the global solution and the inversion results have generally higher *** application to field data reveals a good agreement between the inverted parameters and real logs.

关键词： Nonlinear inversion AVO/AVA inversion Hybrid quantum genetic algorithm(HQGA)

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Thermodynamic Research on Precipitates in Low Carbon Nb-Microalloyed Steels Produced by Compact Strip Production

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Journal of Materials Science & Technology 2007年第2期23卷 267-272页

作者： Song xiang Guoquan liU yang li Changrong li Andong WANG School of Material Science and Engineering University of Science and Technology Beijing Beijing 100083 China

Microalloying element Nb in low carbon steels produced by compact strip production （CSP） process plays an important role in inhibiting recrystallization, decreasing the transformation temperature and grain *** decreasing the rolling temperature, dislocations can be pinned by carbonitrides and the strength is increased. Based on the two sublattice model, with metal atom sublattice and interstitial atom sublattice,a thermodynamic model for carbonitride was established to calculate the equilibrium between matrix and carbonitride. In the steel produced by CSP, the calculation results showed that the starting temperature of precipitation of Ti and Nb are 1340℃ and 1040℃, respectively. In the range of 890-950℃, Nb rapidly precipitated. And the maximum of the atomic fraction of Nb in carbonitride was about 0.68. The morphologies and energy spectrum of the precipitates showed that （NbTi）（CN） precipitated near the dislocations. The experiment results show that Nb rapidly precipitated when the temperature was lower than 970℃, and the atomic fraction of Nb in carbonitride was about 60%-80%. The calculation results are in agreement with the experiment data. Therefore the thermodynamic model can be a useful assistant tool in the research on the precipitates in the low carbon steels produced by CSP.

关键词： Compact strip production Niobium Low carbon microalloyed steels Precipitation Thermodynamic model

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Effect of tongue clearance on hydraulic performance of double support vortex pump

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Defence Technology（防务技术） 2019年第4期15卷 645-654页

作者： xiang-yang li Wan-qiang Chen Sheng-dun Zhao Pump Equipment Engineering Research Center of Shaanxi Province Xi'an Aeronautical University Xi'an 710077 China School of Mechanical Engineering Xi'an Jiaotong University Xi'an 710049 China

In order to study influence of tongue clearance on the hydraulic performance of double support vortex pump,three dimensional flow model with symmetric variable size tongue clearance was established by changing section parameter of tongue clearance,and applied to numerically simulate the steady inner flow in a vortex pump based on fixed working conditions and impeller through ANSYS *** numerical results show the influence of tongue channel with two sections(non-uniform and uniform sections)on flow field characteristics in vortex ***,the variation of tongue channel section changes the vortex structure distribution in circumferential flow *** the spiral forward vortex structure in the circumferential direction shifts to large radius side with increasing tongue ***,the circumferential velocity gradient and axial pressure gradient both diminish with the increase of the tongue section,and the inlet/outlet pressure difference and velocity distribution also reduce with increasing tongue channel ***,for vortex pump with non-uniform section of tongue channel,the head diminishes and the efficiency remains constant approximately with the increase of the tongue width,while the head and the efficiency both diminish for uniform section of tongue channel.

关键词： Vortex pump Tongue clearance Non-uniform flow passage Numerical simulation

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Investigation of the shock compression behaviors of Al/PTFE composites with experimental and a 3D mesoscale-model

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Defence Technology（防务技术） 2022年第1期18卷 62-71页

作者： xiang-li yang Yong He Yuan He Chuan-ting Wang Jie Zhou Departnentsof Mecharical Engneering Nanjing Uriversity of Science&Technology NanjingJiangsu210094PR China Hubei Aeros pace Flight Vehide Institute Wuhan 430040PR China

The responses of Al/PTIFE reactive materials(RMs)under shock compression were investigated by a single-stage gas gun.A 3D mesoscale-model was established based on micro-computed tomography(micro-CT)slice images and confirmed with experimental *** the high-pressure stage,the com-posites reacted partially,whereas there were no deviations between the partially reacted Hugoniot and the inert simulation *** simulation reveals that the Teflon matrix melting on the high shock *** and decomposition of the PTFE accelerated the diffusion of the ***,the reactions of the Al/PTFE composites are more like a combustion rather than a detonation.

关键词： AI/PTFE reactive materials 3D mesoscale-model Shock-assisted reaction Shock Hugoniot

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A physical model study of shale seismic responses and anisotropic inversion

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Petroleum Science 2021年第4期18卷 1059-1068页

作者： Pin-Bo Ding Fei Gong Feng Zhang xiang-yang li State Key Laboratory of Petroleum Resource and Prospecting China University of Petroleum(Beijing)Beijing102249China CNPC Key Laboratory of Geophysical Exploration China University of Petroleum(Beijing)Beijing102249China

The seismic responses of the shale properties are critical for shale gas reservoir evaluation and *** has been widely reported that the clay minerals have substantial influences on the seismic wave anisotropy and ***,knowing the seismic responses of the clay-rich shales and estimation of shale elastic properties are significant for the shale gas industry.A physical model containing two groups of shale blocks as the target formations is constructed in *** group S contains six shale blocks with different clay contents,and the group N contains six shale blocks with different *** acquired 2D seismic data is used to analyze the seismic responses of two corresponding seismic *** anisotropic three-term inversion method is applied to one of the seismic inline to estimate the elastic properties the target shale *** inversed attributes can be used to reveal the effects of shale clay *** study shows the substantial significance of using a physical model to observe the seismic responses of shale *** inversion results indicate that the anisotropic three-term inversion method could provide accurate results of elastic properties as well as the P-wave anisotropy parameter for shale formations.

关键词： Physical model Shale Clay AVO Anisotropy

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Comparison of the predictive value of anthropometric indicators for the risk of benign prostatic hyperplasia in southern China

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Asian Journal of Andrology 2023年第2期25卷 265-270页

作者： Meng-Jun Huang Yan-Yi yang Can Chen Rui-xiang Luo Chu-Qi Wen yang li ling-Peng Zeng xiang-yang li Zhuo Yin Department of Urology The Second Xiangya Hospital of Central South UniversityChangsha 410011China Health Management Center The Second Xiangya Hospital of Central South UniversityChangsha 410011China

This study aimed to compare the predictive value of six selected anthropometric indicators for benign prostatic hyperplasia(BPH).Males over 50 years of age who underwent health examinations at the Health Management Center of the Second xiangya Hospital,Central South University(Changsha,China)from June to December 2020 were enrolled in this *** characteristic data were collected,including basic anthropometric indices,lipid parameters,six anthropometric indicators,prostate-specific antigen,and total prostate *** odds ratios(ORs)with 95%confidence intervals(95%CIs)for all anthropometric parameters and BPH were calculated using binary logistic *** assess the diagnostic capability of each indicator for BPH and identify the appropriate cutoff values,receiver operating characteristic(ROC)curves and the related areas under the curves(AUCs)were *** six indicators had diagnostic value for BPH(all P≤0.001).The visceral adiposity index(VAI;AUC:0.797,95%CI:0.759–0.834)had the highest AUC and therefore the highest diagnostic *** was followed by the cardiometabolic index(CMI;AUC:0.792,95%CI:0.753–0.831),lipid accumulation product(LAP;AUC:0.766,95%CI:0.723–0.809),waist-to-hip ratio(WHR;AUC:0.660,95%CI:0.609–0.712),waist-to-height ratio(WHtR;AUC:0.639,95%CI:0.587–0.691),and body mass index(BMI;AUC:0.592,95%CI:0.540–0.643).The sensitivity of CMI was the highest(92.1%),and WHtR had the highest specificity of 94.1%.CMI consistently showed the highest OR in the binary logistic regression ***,WHtR,WHR,VAI,CMI,and LAP all influence the occurrence of BPH in middle-aged and older men(all P≤0.001),and CMI is the best predictor of BPH.

关键词： benign prostate hyperplasia obesity index predictive value risk prediction

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APF-GAN:Exploring asymmetric pre-training and fine-tuning strategy for conditional generative adversarial network

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Computational Visual Media 2024年第1期10卷 187-192页

作者： Yuxuan li lingfeng yang xiang li College of Computer Science Nankai UniversityTianjinChina School of Computer Science and Engineering Nanjing University of Science and TechnologyNanjingChina

The use of generative adversarial network(GAN)-based models for the conditional generation of image semantic segmentation has shown promising results in recent ***,there are still some limitations,including limited diversity of image style,distortion of detailed texture,unbalanced color tone,and lengthy training *** address these issues,we propose an asymmetric pre-training and fine-tuning(APF)-GAN model.

关键词： tuning network asymmetric

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不同杀虫剂防治苜蓿蚜虫效果及对捕食性天敌影响

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山东农业大学学报（自然科学版） 2024年第4期55卷 587-592页

作者：刘锦陈鹏迟宝杰翟孟圆杨向黎刘永杰山东农业工程学院林业工程学院山东济南250100 山东农业大学植物保护学院山东泰安271018

为明确不同杀虫剂对紫花苜蓿蚜虫及其捕食性天敌的影响,本研究比较了吡虫啉、啶虫脒、烯啶虫胺、氟啶虫胺腈、吡蚜酮和螺虫乙酯6种杀虫剂施药后不同时间对苜蓿蚜虫的防治效果及其对捕食性天敌的影响。结果表明,喷药后至10d,6种杀虫剂的... 详细信息

为明确不同杀虫剂对紫花苜蓿蚜虫及其捕食性天敌的影响,本研究比较了吡虫啉、啶虫脒、烯啶虫胺、氟啶虫胺腈、吡蚜酮和螺虫乙酯6种杀虫剂施药后不同时间对苜蓿蚜虫的防治效果及其对捕食性天敌的影响。结果表明,喷药后至10d,6种杀虫剂的防治效果均在85%以上,之后防效均出现不同程度下降,喷药后20d~35d,吡虫啉、啶虫脒、烯啶虫胺和氟啶虫胺腈4种杀虫剂防效为19.17%~40.13%,吡蚜酮和螺虫乙酯防效为58.01%~71.32%,吡蚜酮和螺虫乙酯持续防控效果显著高于前4种杀虫剂。蚜虫和天敌发生动态趋势表明,喷药后蚜虫数量均迅速下降至低水平并保持到4月底;5月上旬吡虫啉、啶虫脒、烯啶虫胺和氟啶虫胺腈4种杀虫剂处理区蚜虫数量开始快速上升,同一调查时间蚜虫数量均显著大于吡蚜酮和螺虫乙酯处理区数量,而天敌数量和益害比却均显著小于吡蚜酮和螺虫乙酯处理区;吡蚜酮和螺虫乙酯防控蚜虫的同时可避免杀伤天敌,自然天敌捕食蚜虫亦抑制蚜虫数量增长,二者协同控制蚜虫危害作用时间长,为苜蓿蚜虫高效绿色防控提供科学依据。

关键词：紫花苜蓿蚜虫捕食性天敌益害比防治效果

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