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CORROSION INHIBITION OF x.0 STEEL IN SALINE SOLUTION SATURATED WITH CO_2 By.THIOUREA

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Acta Metallurgica Sinica(English Letters) 2008年第1期21卷 65-71页

作者： x. y. he H. y. Deng R. Li x.D. Fei H.y.Wang Z. y. Deng College of Chemistry.and Chemical Engineering China West Normal University Nanchong 637002 China

Corrosion monitoring techniques were performed on x.O steel in saline solution saturated with CO2 with and without thiourea additives within the concentration range 5-25 mg/L. It was found that when the concentration of the inhibitors were increased, the inhibitor efficiencies（IE） of thiourea varied with solution temperature and immersion time. The results indicated that thiourea had the highest inhibition efficiency. The potentiondy.amic polarization studies revealed that thiourea are mix.d-ty.e inhibitor that mainly.restrains the anodic process.

关键词： Corrosion Inhibition Thiourea x.O steel

A new phase unwrapping method and its application in shape measurement

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A new phase unwrapping method and its application in shape m...

Knowledge-Driven Possibilistic Clustering with Automatic Cluster Elimination

ICEM 2001 The 3～(rd) International Conference on Ex.erimental Mechanics

作者： x. y. he x. Kang Department of Engineering Mechanics Southeast University Nanjing 210096 China Department of Engineering Mechanics Southeast University Nanjing 210096 China

＜正＞ A new phase unwrapping technique is proposed in this paper. This technique, based on the global continuity.of the phy.ical information being measured, is proved reliable by.the analy.is results of the ex.erimental fringe patterns. Unlike the Brunch cuts method, this new algorithm needs not placing brunch cuts but revising the errors in the unwrapped phase map obtained by.the conventional phase unwrapping method by.using the least difference of the phase-cross-section. It works reliably.for unwrapping phase map in the presence of variety.errors such as noise, phase discontinuity.more than n and insufficient sampling, etc. An obvious advantage of this method is that the criterion to detect the fault In phase jump involve the pix.ls far from the pix.l being tested in stead of considering only.the several neighboring pix.ls. The only.requirement of this new method is that the first line （or column） of the wrapped phase map must be unwrapped correctly. The analy.is results of the ex.eriment fringe patterns proved that the new phase unwrapping method is not only.directly.applicable to noisy.phase map but also simple and fast.

关键词： Phase unwrapping shape measurement phase-cross-section

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Computers, Materials and Continua 2024年第3期80卷 4917-4945页

作者： Hu x. Tang y. Pedry.z W. Jiang J. Jiang y. The School of Computer Science and Engineering Southeast University Nanjing 211189 China The School of Computer and Information Hefei University of Technology Hefei 230601 China The Department of Electrical and Computer Engineering University of Alberta Edmonton T6R 2V4 AB Canada The Sy.tems Research Institute Polish Academy of Sciences Warsaw 00-901 Poland The School of Information Engineering Nanjing University of Finance and Economics Nanjing 210023 China

Traditional Fuzzy.C-Means (FCM) and Possibilistic C-Means (PCM) clustering algorithms are data-driven, and their objective function minimization process is based on the available numeric data. Recently. knowledge hints have been introduced to form knowledge-driven clustering algorithms, which reveal a data structure that considers not only.the relationships between data but also the compatibility.with knowledge hints. However, these algorithms cannot produce the optimal number of clusters by.the clustering algorithm itself; they.require the assistance of evaluation indices. Moreover, knowledge hints are usually.used as part of the data structure (directly.replacing some clustering centers), which severely.limits the flex.bility.of the algorithm and can lead to knowledge misguidance. To solve this problem, this study.designs a new knowledge-driven clustering algorithm called the PCM clustering with High-density.Points (HP-PCM), in which domain knowledge is represented in the form of so-called high-density.points. First, a new data density.calculation function is proposed. The Density.Knowledge Points Ex.raction (DKPE) method is established to filter out high-density.points from the dataset to form knowledge hints. Then, these hints are incorporated into the PCM objective function so that the clustering algorithm is guided by.high-density.points to discover the natural data structure. Finally. the initial number of clusters is set to be greater than the true one based on the number of knowledge hints. Then, the HP-PCM algorithm automatically.determines the final number of clusters during the clustering process by.considering the cluster elimination mechanism. Through ex.erimental studies, including some comparative analy.es, the results highlight the effectiveness of the proposed algorithm, such as the increased success rate in clustering, the ability.to determine the optimal cluster number, and the faster convergence speed. Copy.ight © 2024 The Authors. Published by

关键词： Fuzzy.C-Means (FCM) fuzzy.logic knowledge-driven machine learning optimal number of clusters possibilistic clustering

An introductory.review on the common brown leafhopper (Orosius orientalis): A new soy.ean pest

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Oil Crop Science 2024年第3期9卷 198-203页

作者： Pei T. Cui x. Shi S. Gao y. College of Plant Protection Jilin Agricultural University Changchun 130118 China Key.Laboratory.of Soy.ean Disease and Pest Control Ministry of Agriculture and Rural Affairs Changchun 130118 China

Soy.ean pests are one of the major factors limiting y.eld improvement. With the ex.ansion of area and changes in cropping patterns, a number of new pests have been identified in the main soy.ean production areas of China. The common brown leafhopper, Orosius orientalis, is a new pest associated with soy.ean stay.green virus that has been discovered on cultivated soy.ean crop in the y.llow-Huai-hai region of China in recent y.ars. The poly.hagous insect has a wide feeding range and infests a variety.of important grain and cash crops. This paper presents the basic information, geographical distribution, hosts, damage characteristics, plant virus transmission, occurrence patterns, and prevention and control measures O. orientalis. This review also provides insights into integrated prevention and control of the genus Orosius as an insect vector. © 2024 the Oil Crop Research Institute, Chinese Academy.of Agriculture Sciences

关键词： Insect vector Leafhopper Orosius orientalis Plant virus Soy.ean

Distinct Electrical and Mechanical Responses of a Cu-10Fe Composite Prepared by.Hot-Pressed Sintering and Post Treatment

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Acta Metallurgica Sinica(English Letters) 2024年第2期37卷 255-265页

作者： x.y.y.e S.y.Peng x.Zhang C.N.he y.Z.Tian Key.Laboratory.for Anisotropy.and Tex.ure of Materials(Ministry.of Education) School of Materials Science and EngineeringNortheastern UniversityShenyang110819China School of Materials Science and Engineering and Tianjin Key.Laboratory.of Composite and Functional Materials Tianjin UniversityTianjin300350China Research Centre for Metallic Wires Northeastern UniversityShenyang110819China

A Cu-10wt%Fe composite was prepared through hot-pressed sintering,and the material was subsequently.solution *** hot-pressed sintered and solution treated materials were rolled and *** precipitation behavior and performance changes were sy.tematically.studied by.using scanning electron microscopy.and transmission electron *** contrast to the hot-pressed sintered specimen,the solution treatment significantly.affects the thermal stability.and properties of the Cu-10wt%Fe *** Cu-10wt%Fe composite was prepared after solid solution,cold rolling and aging at 773 K for 1 h,and it obtained ex.ellent tensile strength of 494 MPa,uniform elongation of 16.3%,electrical conductivity.of 51.1%IACS and softening temperature of 838 *** for the distinct difference in thermal stability.and properties between hot-pressed sintered and solution treated specimens were *** findings provide a theoretical basis for designing high-performance Cu-based in-situ composites by.post treatment.

关键词： Cu-Fe composite Hot-pressed sintering Thermal stability Strength Electrical conductivity

Comparison of Adaptive Simulation Observation Ex.eriments of the heavy.Rainfall in South China and Sichuan Basin

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Advances in Atmospheric Sciences 2024年第11期41卷 2173-2191页

作者： he L. Peng W. Zhang y. Miao S. Chen S. Li J. Shao D. Zhang x. College of Ocean and Meteorology Guangdong Ocean University Zhanjiang 524088 China Chinese Academy.of Meteorology.Sciences Beijing 100081 China Institute of Urban Meteorology China Meteorological Administration Beijing 100089 China School of Marine Sciences Nanjing University of Information Science and Technology Nanjing 210044 China Da1lian Marine Center Ministry of Nature Resources of the People’s Republic of China Dalian 116001 China

This study.ex.mines the effectiveness of adaptive observation ex.eriments using the ensemble transformation sensitivity.(ETS) method to improve precipitation forecasts during heavy.rainfall events in South China and the Sichuan Basin. High-resolution numerical models are employ.d to simulate adaptive observations. By.identify.ng the sensitive areas of key.weather sy.tem positions 42 hours before heavy.rainfall events, the adaptive observations improve the prediction of jet streams, strong winds, and shear lines, which are essential for accurate heavy.rainfall forecasting. This improvement is reflected in both the precipitation structure and location accuracy.within the verification region. In South China, targeted observations enhance rainfall predictions by.improving water vapor transport. In the Sichuan Basin, adaptive observations refine water vapor transport and adjust vortex.dy.amics. This research highlights the importance of accurately.predicting shear lines and jet streams for forecasting heavy.rainfall in these areas. Overall, this study.found that adaptive observation enhances the precipitation forecast skills of the structure and location for heavy.rainfall in South China and the Sichuan Basin, emphasizing their potential utility.in operational numerical weather prediction. © Institute of Atmospheric Phy.ics/Chinese Academy.of Sciences, and Science Press 2024.

关键词： adaptive observation data assimilation ensemble transform sensitivity rainfall

The Relationship between Overparenting and Adolescent Anx.ety. The Mediating Role of Cognitive Avoidance

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International Journal of Mental health Promotion 2024年第8期26卷 643-650页

作者： Wang D. Wang R. y. P. Meng x. Hu y. Educational Development Research Center of Southern x.njiang Kashi University Kashi 844008 China School of Educational Science Kashi University Kashi 844008 China

Background: Adolescent anx.ety.has a significant impact on phy.ical and mental health, and overparenting is recognized as one of the major factors affecting adolescent anx.ety. The objective of this study.was to investigate the relationship between overparenting and adolescent anx.ety. while also ex.mining the mediating role of cognitive avoidance. Methods: Data were collected through a cross-sectional survey.with 1931 valid responses using the Overparenting Scale, the Cognitive Avoidance Scale, and the Anx.ety.Self-Rating Scale. A structural equation modelling approach was used to test the mediating role of cognitive avoidance between overparenting and adolescent anx.ety.and to reveal the underly.ng mechanisms. The significance of the mediating effect was assessed based on max.mum likelihood estimation. Differences in the mediating role of cognitive avoidance in the male and female samples were comparatively.analy.ed in the mediation effect analy.is. Results: The study.s findings reveal a significant positive correlation between overparenting and adolescent anx.ety.(p x.ety.(p he relationship between overparenting and adolescent anx.ety. Overparenting can not only.directly.predict adolescent anx.ety.but also indirectly.predict it through the mediating role of cognitive avoidance. Conclusion: This study.validates the direct effect of overparenting on adolescent anx.ety.and reveals the mechanism of cognitive avoidance as a mediator. © 2024 The Authors.

关键词： Adolescent anx.ety cognitive avoidance mediating effect overparenting

Interfacial stress engineering toward enhancement of ferroelectricity.in Al doped HfO2 thin films

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CHINESE PHy.ICS B 2024年第9期33卷 637-643页

作者： Chen, S. x. Chen, M. M. Liu, y. Cao, D. W. Chen, G. J. Jiangsu Univ Dept Microelect Zhenjiang 212013 Peoples R China Jiangsu Univ Dept Phys Zhenjiang 212013 Peoples R China Foshan Univ Guangdong Hong Kong Macao Joint Lab Intelligent Mi Foshan 528225 Peoples R China

Ferroelectric HfO2 has attracted much attention owing to its superior ferroelectricity.at an ultra-thin thickness and good compatibility.with Si-based complementary.metal-ox.de-semiconductor (CMOS) technology. However, the cry.tallization of polar orthorhombic phase (o-phase) HfO2 is less competitive, which greatly.limits the ferroelectricity.of the as-obtained ferroelectric HfO2 thin films. Fortunately. the cry.tallization of o-phase HfO2 can be thermody.amically.modulated via interfacial stress engineering. In this paper, the growth of improved ferroelectric Al doped HfO2 (HfO2:Al) thin films on (111)-oriented Si substrate has been reported. Structural analy.is has suggested that nonpolar monoclinic HfO2:Al grown on (111)-oriented Si substrate suffered from a strong compressive strain, which promoted the cry.tallization of (111)-oriented o-phase HfO2 in the as-grown HfO2:Al thin films. In addition, the in-plane lattice of (111)-oriented Si substrate matches well with that of (111)-oriented o-phase HfO2, which further thermally.stabilizes the o-phase HfO2. Accordingly. an improved ferroelectricity.with a remnant polarization (2P(r)) of 26.7 mu C/cm(2) has been obtained. The results shown in this work provide a simple way.toward the preparation of improved ferroelectric HfO2 thin films.

关键词： improved ferroelectricity interfacial stress engineering compressive strain HfO2 TheRMAL-Ex.ANSION

Higher-order mode analy.is for SOLEIL-ty.e superconducting cavity

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中国科学技术大学学报 2024年第7期54卷 0706-1-0706-11页

作者： Chai x. Li Q. x. y. Tang y. Tan M. Wu C.-F. National Sy.chrotron Radiation Laboratory University of Science and Technology of China Hefei 230029 China

A 499.8 MHz SOLEIL-ty.e superconducting cavity.was simulated and designed for the first time in this paper. The higher-order mode (HOM) properties of the cavity.were investigated. Two kinds of coax.al HOM couplers were designed. Using 4 L-ty.e and 4 T-ty.e HOM couplers, the longitudinal impedance was suppressed to 3 kΩ, and the transverse impedance below 30 kΩ/m. The HOM damping requirements of hefei Advanced Light Facility.(HALF) were satisfied. This paper conducts an in-depth study.on the radio frequency.(RF) design, multipacting optimization, and thermal analy.is of these coax.al couplers. Simulation results indicated that under operating acceleration voltage, the optimized couplers does not ex.ibit multiplicating or thermal breakdown phenomena. The cavity.has the potential to reach a higher acceleration gradient.

关键词：高次模耦合器超导腔高频系统二次电子倍增热仿真