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Degradation research of protective coating on AZ91D Mg alloy components via simulated contamination

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Journal of Magnesium and Alloys 2016年第3期4卷 220-229页

作者： Bao-sheng Liu Ya-fei Kuang yue-sheng chai Da-qing Fang Min-gang Zhang Ying-hui Wei College of Materials Science and Engineering Taiyuan University of Science and TechnologyTaiyuanShanxi 030024China Engineering Research Center for Magnesium Alloys of Shanxi Province Taiyuan University of Science and TechnologyTaiyuanShanxi 030024China College of Materials Science and Engineering Taiyuan University of TechnologyTaiyuanShanxi 030024China

Accelerated environmental(hygrothermal)exposure experiments are performed on organic paints coated on commercial die-cast AZ91D Mg alloys to investigate the effects of contamination on ***,artificial human perspiration spray is used to contaminate the substrate *** occurred only for paints that are spread on surfaces with the perspiration *** blisters gradually form at longer test times,and the volume of blistering *** electron microscopy indicates that blistering is initiated by contamination and/or substrate corrosion at the interface of the organic paints and the *** is characterized for two samples exposed to the hygrothermal environments for various times,and is found to be initially empty in the early *** chloride contaminants from the perspiration lead to in situ adhesion ***,the paints volume expands,and the associated compressive stress causes it to *** long-term test exposure,chloride anions corrode the substrate under the films,and MgO,Mg(OH)_(2),and Mg_(2)(OH)_(3)Cl corrosion products fill the ***,a model of blistering evolution is discussed.

关键词： Mg alloys Organic paints Artificial human perspiration Blistering Corrosion

Giant magneto-impedance effect of two paralleled amorphous microwires

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Rare Metals 2016年第4期35卷 344-348页

作者： Shu-Ling Zhang yue-sheng chai Da-Qing Fang Lu-Cai Wang Da-Wei Xing Jian-Fei Sun School of Materials Science and Engineering Taiyuan University of Science and Technology School of Materials Science and Engineering Harbin Institute of Technology

Giant magneto-impedance （GMI） is effectively enhanced by the mutual magnetic interaction between two amorphous microwires. A comparative study on GMI properties of a single wire and two wires arranged in par- allel mode was reported in this work. Two-peak （TP） of impedance characteristic is presented when the dc external field changed from 0 to 320 A,m-＇ in two-wire system, which is attributed to successive magnetization process in two wires induced by their magnetic interaction. And the evolution of single peak to TP phenomenon, when the distance between two wires is upto 8 ram, evidences a distance dependence of transformation from successive magnetization to simultaneous via a corresponding dis- tance dependence of magnetostatic interactions. It is pro- posed that the recombination of magnetic interaction and the shielding effect results in a distance dependency of GMI response. When the distance is 8 ram, the magneti- zation process is close to synchronous between two wires, which give rises to higher circular permeability and better GMI response. The impedance ratio AZ/Z increases from 74.5 % of single wire to 172.4 % at 10 MHz. However, when the distance is upto 12 mm, the magnetic interaction is weak and magnetization process is completely independent, and GMI response decreases, relatively. This indicates that the GMI response could be effectively improved in a two-wire connection with an optical distance, which is promising and useful for the application of high-performance GMI sensors.

关键词： Amorphous microwire Magnetic interaction Giant magneto-impedance Magnetization

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Crevice corrosion of reinforcing steel in carbonated simulated concrete pore solutions contaminated by chloride

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Journal of Iron and Steel Research International 2025年第1期32卷 293-311页

作者： Peng-peng Wu Yuan-pei Gong Shao-hua Zhang yue-zhong Zhang Bao-sheng Liu Guang-ling Song College of Materials Science and Engineering Taiyuan University of Science and TechnologyTaiyuan030024ShanxiChina College of Chemical Engineering and Technology Taiyuan University of Science and TechnologyTaiyuan030024ShanxiChina Department of Ocean Science and Engineering Southern University of Science and TechnologyShenzhen518055GuangdongChina School of Mechanical and Mining Engineering Centre for Advanced Materials Processing and Manufacturing(AMPAM)The University of QueenslandSt LuciaQLD4072Australia State Key Laboratory of Physical Chemistry of Solid Surfaces Xiamen UniversityXiamen361005FujianChina

The crevice corrosion of the reinforcing steel in the carbonated simulated concrete pore solutions(SCPSs)containing 0.04 mol/L chloride was *** comparison,the steel without crevice covered on its surface was also *** showed that the crevice corrosion in the uncarbonated SCPS was not triggered and the steel remained passivity by suppressing the anodic dissolution in the crevice *** SCPS was carbonated to have pH values of 10.5 and 11.5,the crevice corrosion was easier to be activated than the widely reported pitting corrosion owing to the rapid oxygen depletion within the crevice,but the crevice corrosion damage might be alleviated to a certain extent due to the relative compact surface film formed inside the *** further carbonation led to the activation dissolution of both the crevice interior and exterior,causing the more serious corrosion *** process of the crevice corrosion was systematically analyzed by combining the electrochemical measurement results and Evens polarization diagram.

关键词： Crevice corrosion Reinforcing steel Carbonation Electrochemical test Rust Evens polarization diagram

Significant spatiotemporal pattern of nitrous oxide emission and its influencing factors from a shallow eutropic lake in Inner Mongolia,China

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Journal of Environmental Sciences 2025年第3期149卷 488-499页

作者： Guohua Li sheng Zhang Xiaohong Shi shengnan Zhao Liyang Zhan Xueru Pan Fan Zhang Haifeng Yu yue Sun Lauri Arvola Jussi Huotari Water Conservancy and Civil Engineering College Inner Mongolia Agricultural UniversityHohhot 010018China Inner Mongolia Water Resource Protection and Utilization Key Laboratory Hohhot 010018China State Gauge and Research Station of Wetland Ecosystem Wuliangsuhai LakeBayan Nur 014404China Key Laboratory of Global Change and Marine-Atmospheric Chemistry Third Institute of OceanographyMinistry of Natural ResourcesXiamen 361005China Faculty of Biological and Environmental Sciences Ecosystems and Environment Research ProgrammeLammi Biological StationUniversity of HelsinkiLammi FI-16900Finland Masinotek Oy Ensimmainen Savu 2Vantaa FI-01510Finland

Eutrophic shallow lakes are generally considered as a contributor to the emission of nitrous oxide(N_(2)O),while regional and global estimates have remained *** due to a lack of data and insufficient understanding of the multiple contributing *** study characterized the spatiotemporal variability in N_(2)O concentrations and N_(2)O diffusive fluxes and the contributing factors in LakeWuliangsuhai,a typical shallow eutrophic and seasonally frozen lake in Inner Mongolia with cold and arid *** N_(2)O concentrations of the lake exhibited a range of 4.5 to 101.2 nmol/L,displaying significant spatiotemporal *** lowest and highest concentrations were measured in summer and winter,*** spatial distribution of N_(2)Ofluxwas consistent with that of N_(2)O ***,the hotspots of N_(2)O emissions were detected within close to the main inflow of *** wide spatial and temporal variation in N_(2)O emissions indicate the complexity and its relative importance of factors influencing emissions.N_(2)O emissions in different lake zones and seasons were regulated by diverse *** influencing the spatial and temporal distribution of N_(2)O concentrations and fluxes were identified as WT,WD,DO,Chl-a,SD and ***,the same factor demonstrated opposing effects on N_(2)O emission in various seasons or *** research improves our understanding of N_(2)O emissions in shallow eutrophic lakes in cold and arid areas.

关键词： Nitrous oxide Spatial and temporal variation Controlling factors Shallow lakes

Autocyclic switching processes and architecture of lobes in river-dominated lacustrine deltas

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Journal of Palaeogeography 2025年第1期14卷 126-140页

作者： Zhen-Hua Xu sheng-He Wu Piret Plink-Bj?rklund Tao Zhang Da-Li yue Qi-Hao Qian Qing Li Wen-Jie Feng National Key Laboratory of Petroleum Resources and Engineering China University of Petroleum (Beijing) College of Geosciences China University of Petroleum (Beijing) Department of Geology and Geological Engineering Colorado School of Mines Gas Production Plant 2 PetroChina Changqing Oilfield Company PetroChina Research Institute of Petroleum Exploration and Development College of Geosciences Yangtze University

River-dominated lacustrine deltas typically consist of multiple lobes due to autogenic lobe switching that occurs over short time scales. However, the switching patterns of multiple lobes in these deltas remain poorly understood, and the architectural features attributed to lobe switching are also lacking. By integrating Delft3D simulations, flume experiments, and modern deposit analysis, we proposed that autogenic lobe switching follows a cyclic pattern. Autocyclicity begins with the formation of an offshore lobe and concludes after a series of longshore lobe growth events, marked by longshore avulsions occurring along the sides of offshore distributary *** avulsions follow a sequence that usually occurs earlier distally than proximally and subsequently occurs on one longshore side and then on the other side. Each lobe begins with rapid growth, which gradually slows and then stops once a channel avulsion is influenced by the backwater effect that triggers lobe switching. Three signals indicate lobe switching: a decrease in progradation rate, foreset slope steepening coupled with topset slope gentling, and the deposition of mud-dominated sediments. The number of autocyclic events never exceeds *** first two autocyclicities contribute to more than 55% of delta length and 70% of delta area. The lobes are separated by 1-6 stages of mud-dominated accretion beds that exhibit a downstream-inclined shape and convexup or lateral overlapping pattern. This study conducts a coupled growth-geometric assessment to establish an architectural pattern for river-dominated lacustrine deltas. This architectural pattern offers valuable insights into predicting sandy lobe distribution in river-dominated lacustrine delta reservoirs, and the architecture of muddy accretion beds aids in predicting the rule of oil-water movement and distribution of remaining oil.

关键词： Autocyclic lobe switching River-dominated lacustrine delta Architecture Avulsion sequence Backwater effect

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融合多策略改进的白鲸优化算法

计算机工程与应用 2025年第5期61卷 76-93页

作者：柴岩常晓萌任生辽宁工程技术大学理学院辽宁阜新123000

为进一步提升白鲸优化算法(BWO)的寻优能力和收敛速度,提出一种融合多策略改进的白鲸优化算法(multi-strategy improved beluga whale optimization,MIBWO)。针对算法初期因随机生成个体的遍历性较差使得算法易陷入局部的劣势,利用PWLC... 详细信息

为进一步提升白鲸优化算法(BWO)的寻优能力和收敛速度,提出一种融合多策略改进的白鲸优化算法(multi-strategy improved beluga whale optimization,MIBWO)。针对算法初期因随机生成个体的遍历性较差使得算法易陷入局部的劣势,利用PWLCM混沌映射增加种群多样性以及准反向学习生成的反向解增强初始解的质量,为算法寻优性能奠定基础;构造一种动态限制局部扰动搜索机制,引入非线性收敛因子扰动个体增加求解精度与速度,为避免收敛因子在迭代后期过快收敛,利用动态平衡搜索策略以避免陷入局部最优;提出一种差异性种群进化策略对鲸鱼坠落阶段进行最优值位置扰动更新,有效提升收敛精度。理论分析和数值实验证明MIBWO算法具有较强的寻优性能,MIBWO算法在PV辨识问题体现了良好的寻优性能、收敛速度及鲁棒性并具有一定的实际工程应用前景。

关键词：白鲸优化算法 PWLCM混沌映射准反向学习非线性收敛因子动态平衡搜索策略差异性种群进化策略 PV辨识问题

维普期刊数据库

Relationship between parenting stress and behavioral and emotional problems in preschool children: A mediation effect analysis

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World Journal of Psychiatry 2025年第1期15卷 128-136页

作者： Zhi-Wei Fu yue-Jing Li Ran Yu Rui-Qing Guo Li-Xia Gao sheng-Xia Zhao Department of Children's Health Shijiazhuang Maternity and Child Healthcare HospitalShijiazhuang 050000Hebei ProvinceChina

BACKGROUND Emotional reactions,such as anxiety,irritability,and aggressive behavior,have attracted clinical attention as behavioral and emotional problems in preschool-age *** To investigate the current status of family rearing,parental stress,and behavioral and emotional problems of preschool children and to analyze the mediating effect of the current status of family rearing on parental stress and behavioral/emo-tional *** We use convenience sampling to select 258 preschool children in the physical examination center of our hospital from October 2021 to September *** children and their parents were evaluated using a questionnaire ***'s correlation was used to analyze the correlation between child behavioral and emotional problems and parental stress and family rearing,and the structural equation model was constructed to test the mediating *** The score for behavioral/emotional problems of 258 preschool children was(27.54±3.63),the score for parental stress was(87.64±11.34),and the score for parental family rearing was(31.54±5.24).There was a positive correlation between the behavioral and emotional problems of the children and the“hostile/mandatory”parenting style;meanwhile,showed a negative correlation with the“support/participation”parenting style(all P<0.05).The intermediary effect value between the family upbringing of parents in parental stress and children's behavior problems was 29.89%.CONCLUSION Parental family upbringing has a mediating effect between parental stress and behavioral and emotional problems of *** paying attention to the behavioral and emotional problems of preschool-age children,clinical medical staff should provide correct and reasonable parenting advice to their parents to promote the mental health of preschool-age children.

关键词： Preschool children Parenting stress Children's behavioral and emotional problems Family rearing Mediating effect

Sympathetic Solar Eruption on 2024 February 9

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Research in Astronomy and Astrophysics 2025年第1期25卷 184-193页

作者： Shu-yue Li Qing-Min Zhang Bei-Li Ying Li Feng Ying-Na Su Mu-sheng Lin Yan-Jie Zhang School of Science Nanjing University of Posts and Telecommunications Key Laboratory of Dark Matter and Space Astronomy Purple Mountain Observatory School of Astronomy and Space Science University of Science and Technology of China

In this paper,we perform a follow-up investigation of the solar eruption originating from active region 13575 on2024 February *** primary eruption of a hot channel generates an X3.4 class flare,a full-halo coronal mass ejection （CME）,and an extreme-ultraviolet （EUV） *** between the wave and a quiescent prominence（QP） leads to a large-amplitude,transverse oscillation of *** the transverse oscillation,QP loses equilibrium and rises *** ascending motion of the prominence is coherently detected and tracked up to～1.68 R⊙by the Solar Ultra Violet Imager onboard the GOES-16 spacecraft and up to～2.2 R⊙by the Solar Corona Imager（SCI＿UV） of the Lyα Solar Telescope onboard the ASO-S *** velocity increases linearly from 12.3 to68.5 km s-1at 18:30 *** sympathetic eruption of QP drives the second CME with a typical three-part *** bright core comes from the eruptive prominence,which could be further observed up to～3.3 R⊙by the Large Angle Spectroscopic Coronagraph onboard the Solar and Heliospheric Observatory *** leading edge of the second CME accelerates continuously from～120 to～277 km *** EUV wave plays an important role in linking the primary eruption with the sympathetic eruption.

关键词： Sun: coronal mass ejections (CMEs) Sun: filaments, prominences Sun: flares

Efficacy of ultrasound cyclo-plasty in patients with refractory glaucoma

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International Journal of Ophthalmology(English edition) 2025年第3期18卷 420-423页

作者： Hui-Min Zhong Xiao-Hong Liu Shou-yue Huang Hui-Ping Yao Yi-sheng Zhong Jing Wang Department of Ophthalmology Ruijin Hospital Affiliated Medical SchoolShanghai Jiao Tong UniversityShanghai 200025China Department of Ophthalmology Shanghai General Hospital(Shanghai First People’s Hospital)Shanghai Jiao Tong UniversityShanghai 200080China

AIM:To assess the efficacy and safety of ultrasound cycloplasty(UCP)in lowering intraocular pressure(IOP)among Chinese patients suffering from refractory ***:In this 12-month retrospective study,28 patients with refractory glaucoma(IOP≥25 mm Hg)were treated with 8-second UCP using either 8 or 10 probe *** principal measure of efficacy was the decrease in IOP at the following intervals after UCP:1d,1,3,6,and 12mo,with each measurement compared to ***:Mean IOP(in mm Hg)was reduced from 46.8±8.9 to 24.5±3.2,27.0±4.8,29.1±4.6,26.1±4.5,and 28.3±4.8 at 1d,1,3,6,and 12mo postoperatively,*** to baseline,IOP reductions at these time points were 45.0%,39.9%,35.3%,41.4%,and 36.7%,*** patients experienced relief from ocular pain after *** cases of choroidal detachment or hypotony was ***:UCP is effective in reducing IOP among Chinese patients with refractory glaucoma and shows a favorable safety profile.

关键词： ultrasound cyclo-plasty refractory glaucoma intraocular pressure