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Phase Separation, Wetting and Dewetting in PS/PVME Blend Thin Films:Dependence on Film Thickness and Composition Ratio

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Chinese Journal of Polymer Science 2018年第9期36卷 1084-1092页

作者： Tian Xia ya-Ping qin Ting Huang College of Material Science and Engineering Chongqing University of Technology

The effects of film thickness and composition ratio on the morphology evolution of polystyrene （PS）/poly（vinyl methyl ether）（PVME） blend thin films were investigated. Diverse morphology evolutions including droplet-matrix structure, hole emergence, bicontinuous structure formation, percolation-to-droplet transition could be observed under annealing in two-phase region, depending on film thickness and composition ratio. The mechanism for these morphology variations was related to the complex effects of phase separation, dewetting and preferential wetting. The comparison between the thickness of bottom PVME layer and the twice of gyration radius 2Rg（PVME） played a dominant role in morphology control. Only when the PS/PVME film had specific film thickness and compositional symmetry, phase separation and dewetting could happen in sequence.

关键词： Phase separation Dewetting Wetting

基于精英策略和ABBO算法的输电线路故障诊断模型

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电脑与信息技术 2023年第5期31卷 48-52页

作者：冯艳敏白梅娟侯帅裴东锋孙彭帅秦亚洲河北工程大学信息与电气工程学院河北邯郸056038 国网河北省电力有限公司邯郸供电分公司河北邯郸056002 中国北方车辆研究所北京100072

针对输电线路故障分类问题,提出了一种基于精英策略的生物地理学与算术优化混合算法(ABBO)的输电线路故障诊断模型。首先,为了避免BBO算法的早熟收敛,提出将算术优化算法(AOA)的乘除加减算子代替生物地理学优化算法(BBO)的变异算子以优... 详细信息

针对输电线路故障分类问题,提出了一种基于精英策略的生物地理学与算术优化混合算法(ABBO)的输电线路故障诊断模型。首先,为了避免BBO算法的早熟收敛,提出将算术优化算法(AOA)的乘除加减算子代替生物地理学优化算法(BBO)的变异算子以优化特征属性权重;其次,提出将低于精度阈值的非精英个体进行二次变异的精英策略,以保留优质个体的方式提高算法精度;最后,提出一种基于重力的固定半径的近邻检索方式以改善案例推理中存在的不平衡问题。实验证明,与传统的基于BBO、AOA算法的故障诊断模型相比,该模型能够更加准确的识别故障类型。

关键词：精英策略 BBO 案例推理故障诊断

Perturbed magnetic field of an infinite plate with a centered crack

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Acta Mechanica Sinica 2011年第2期27卷 259-265页

作者： Fei qin yang Zhang ya-Nan Liu College of Mechanical Engineering and Applied Electronics Technology Beijing University of Technology 100124 Beijing China

Deforming a cracked magnetoelastic body in a magnetic field induces a perturbed magnetic field around the crack. The quantitative relationship between this perturbed field and the stress around the crack is crucial in developing a new generation of magnetism-based nondestructive testing technologies. In this paper, an analytical expression of the perturbed magnetic field induced by structural deforma- tion of an infinite ferromagnetic elastic plate containing a centered crack in a weak external magnetic field is obtained by using the linearized magnetoelastic theory and Fourier transform methods. The main finding is that the perturbed magnetic field intensity is proportional to the applied tensile stress, and is dominated by the displacement gradient on the boundary of the magnetoelastic solid. The tangential component of the perturbed magnetic-field intensity near the crack exhibits an antisymmetric distribution along the crack that reverses its direction sharply across its two faces, while the normal component shows a symmetric distribution along the crack with singular points at the crack tips.

关键词： Magnetoelasticity Crack Perturbed magnetic field Fourier transform method Nondestructive testing

Limit state analysis of rigid retaining structures against seismically induced passive failure in heterogeneous soils

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第3期16卷 1095-1105页

作者： Jianfeng zhou Changbing qin College of Civil Engineering Huaqiao UniversityXiamen362021China School of Civil Engineering Chongqing UniversityChongqing400045China Key Laboratory of New Technology for Construction of Cities in Mountain Area Chongqing UniversityChongqing400045China National Joint Engineering Research Center of Geohazards Prevention in the Reservoir Areas Chongqing UniversityChongqing400045China

Soils are not necessarily uniform and may present linearly varied or layered characteristics,for example the backfilled soils behind rigid retaining *** the presence of large lateral thrust imposed by arch bridge,passive soil failure is possible.A reliable prediction of passive earth pressure for the design of such wall is challenging in complicated soil strata,when adopting the conventional limit analysis *** order to overcome the challenge for generating a kinematically admissible velocity field and a statically allowable stress field,finite element method is incorporated into limit analysis,forming finiteelement upper-bound(FEUB)and finite-element lower-bound(FELB)***-static,original and modified pseudo-dynamic approaches are adopted to represent seismic acceleration *** generating feasible velocity and stress fields within discretized elements based on specific criteria,FEUB and FELB formulations of seismic passive earth pressure(coefficient K_(P))can be derived from work rate balance equation and stress *** to an interior point algorithm,optimal upper and lower bound solutions are *** proposed FEUB and FELB procedures are well validated by limit equilibrium as well as lower-bound and kinematic *** studies are carried out to investigate the effects of influential factors on seismic K_(P).Notably,true solution of K_(P) is well estimated based on less than 5%difference between FEUB and FELB solutions under such complex scenarios.

关键词： Retaining wall Passive earth pressure Earthquakes Finite-element limit-analysis methods

Ag-decorated 3D flower-like Bi_(2)MoO_(6)/rGO with boosted photocatalytic performance for removal of organic pollutants

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Rare Metals 2021年第5期40卷 1086-1098页

作者： Xin Liu Wei-ya Huang qin zhou Xi-Rong Chen Kai yang Dan Li Dionysios D.Dionysiou Faculty of Materials Metallurgical and ChemistryJiangxi University of Science and TechnologyGanzhou 341000China Environmental Engineering and Science Program Department of Chemical and Environmental EngineeringUniversity of CincinnatiCincinnatiOH 45221-0012USA College of Science HealthEngineering and EducationMurdoch UniversityMurdoch 6150Australia

A series of unique 3D flower-like Bi_(2)MoO_(6)(BMO)/reduced graphene oxide(rGO)heterostructured composites decorated with varying amounts of Ag nanoparticles(NPs)were *** morphological characteristics,structural features,energy band structures and photoelectrochemical properties were systematically *** the Ag/BMO/rGO ternary composites(AgBGy;y=1%,2%and 3%)demonstrated greater photocatalytic activity towards efficient removal of our selected organic models[methyl orange(MO),rhodamine B(RhB)and phenol],as compared with the BMO/rGO binary composites(BG-x;x=0.25,2,4 and 5).Particularly,AgBG-2%,which was synthesized with the addition of 2 wt% rGO and 2 wt%Ag in BMO,possessed superior photocatalytic *** fitted rate constants(k)for the photocatalytic degradation of RhB,MO and phenol using AgBG-2% were estimated to be 0.0286,0.0301 and 0.0165 min^(-1),respectively,which were over one order of magnitude greater than those obtained using pure *** factors may contribute to the observed enhancement,including greater specific surface area,enhanced light absorption,promoted spatial separation of electronhole(e^(-)-h^(+))pairs and their suppressed recombination,especially benefiting from the synergistic effects among BMO,rGO and Ag *** work suggests that the rational design of BMO/rGO/Ag ternary composite was an effective strategy to boost the photocatalytic activity of the resulting catalyst towards the highly efficient removal of organic pollutants from water.

关键词： Bi_(2)MoO_(6) Reduced graphene oxide Ag nanoparticles 3D flower-like morphology Photocatalytic degradation

Constructing Z-schemeβ-Bi_(2)O_(3)/ZrO_(2)heterojunctions with 3D mesoporous SiO_(2)nanospheres for efficient antibiotic remediation via synergistic adsorption and photocatalysis

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Rare Metals 2022年第6期41卷 2094-2107页

作者： Chong Xu qin zhou Wei-ya Huang Kai yang Yong-Cai Zhang Tong-Xiang Liang Zhao-qing Liu Faculty of Materials Metallurgical and ChemistryJiangxi University of Science and TechnologyGanzhou 341000China School of Chemisiry and Chemical Engineering Yangzhou UniversityYangzhou 225009China College of Rare Eaths Jiangxi University of Science and TechnologyGanzhou 341000China School of Chemistry and Chemical Engineering/Institute of Clean Energy and Materials.Guangzhou Key Laboratory for Clean Energy and Materials/Huangpu Hydrogen Innovation Center Guangzhou UniversityGuangzhou 510006China

A series of Z-schemeβ-Bi_(2)O_(3)/ZrO_(2)hetero-junction composites containing three-dimensional(3D)mesoporous silica nanospheres(MSNs)were synthesized as efficient catalysts for antibiotic *** obtained MSN/β-Bi_(2)O_(3)/ZrO_(2)ternary composites possess novel lamellar cross structure,which is well constructed byβ-Bi_(2)O_(3)nanosheets,3D MSNs,and ZrO_(2)*** optimal sample BZS-2(Bi∶Zr∶Si=1∶0.4∶0.33)shows an adsorptive-photocatalytic removal efficiency of 92.7%towards levofloxacin(LVF)and a total organic carbon(TOC)removal efficiency of 60.0%under simu-lated solar light irradiation for 100 ***-2 can also remove 90.1%and 91.2%of tetracycline hydrochloride(TC)and oxytetracycline hydrochloride(OTC),respectively,and themaximum adsorptioncapacityof TCover BZS-2is almost 10 times that *** ofphotocatalytic activitycan bemainly attributed to the enhanced visible-light adsorption capacity and more efficientseparationof photogenerated electron-hole pairs.A possible Z-scheme photocatalytic mechanism of p BiO/ZrOheterojunctions based on valence band offset(AEvBo)andconduction band offset(EcBo)*** study provides an efficient way to construct novel mesoporous ternary photocatalyst with increased accessible surface area and active sites for treatment of antibiotics by synergistic adsorption and photocatalysis.

关键词： Mesoporous silica nanospheres β-Bi_(2)O_(3) ZiO_(2) Adsorption Photoc atalysis

θ-improved limited tolerance relation model of incomplete information system for evaluation of water conservancy project management modernization

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Water Science and Engineering 2013年第4期6卷 469-477页

作者： Yu-qin GAO Guo-hua FANG ya-qin LIU College of Water Conservancy and Hydropower Engineering Hohai University

The modernization of water conservancy project management is a complicated engineering system involving a management system, a management method, management personnel, the exertion of social, economic, and ecological effects, and so on. However, indices for evaluating the modernization of water conservancy project management are usually unobtainable in practical applications. Conducting appropriate extension of the classical rough set theory and then applying it to an incomplete information system are the key to the application of the rough set theory Based on analysis of some extended rough set models in incomplete information systems, a rough set model based on the θ-improved limited tolerance relation is put forward. At the same time, upper approximation and lower approximation are defined under this improved relation. According to the evaluation index system and management practices, the threshold for θ is defined. An example study indicates the practicability and maneuverability of the model.

关键词： Key words: modernization of water conservancy project management O-improved limitedtolerance relation model," upper and lower approximations," threshold

Southwest Boundary of yangtze and Cathaysia Blocks:Constraints from the Luojiashan Gabbro in Yingyangguan Region,Northeastern Guangxi

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Journal of Earth Science 2024年第5期35卷 1447-1463页

作者： ya qin Zuohai Feng Jiaming Zhu Yonggao Huang Jie Wu Yun zhou Yunfeng Xue Chunzeng Wang Collaborative Innovation Center for Exploration of Nonferrous Metal Deposits and Eficient Utilization of Resources by the Province and Ministry Guilin University of TechnologyGuilin 541004China Jiangsu Tuojia Engineering Design and Research Co. Ltd.Nanjing 211100China China Chemical Geology and Mine Bureau Henan Branch Zhengzhou 450000China University of Maine at Presque Isle Presque IsleMaine 04769USA

The Luojiashan gabbro is a newly discovered mafic pluton emplaced in the Neoproterozoic Yingyangguan Formation in Yingyangguan region of northeastern Guangxi,South *** whole-rock geochemical and zircon geochronological and Hf isotopic analyses are performed on the gabbro and comparisons are made with the coeval mafic-ultramafic sills and dikes located in Longsheng region of northern Guangxi in order to understand the magmatic origin,evolution,and tectonic setting of the Luojiashan gabbro and to address the location of the suture zone of the Southwestern Jiangnan Orogen(SJO).LA-ICP-MS zircon U-Pb ages obtained from the Luojiashan gabbro show that it was emplaced at~770 *** gabbro contains abundant inherited zircons aged at 0.9-1.3 Ga,consistent with age spectrum of the Cathaysia ***-normalized REE pattern,primitive mantle-normalized trace element spider diagram,incompatible element ratios of Nb/Ta,Zr/Hf,La/Nb,Ba/Th,Th/La,and Ba/La,and Th/Yb-Ta/Yb discrimination diagram of the gabbro are indicative of OIB-like geochemical characteristics and of derivation from partially melted garnet peridotite of the asthenospheric *** discrimination based on the trace and rare earth elements also indicate that the Luojiashan gabbro was emplaced in a within-plate extensional rift setting,probably as a result of Rodinia supercontinent dismantling,lithospheric thinning,and underplating and upwelling of the asthenospheric *** on zircon age,Hf isotopic data and comparison between northern and northeastern Guangxi,it is suggested that the Yingyangguan region was tectonically situated in a different tectonic locale from the Longsheng region of northern Guangxi at about 770 Ma during the post-orogenic mafic-ultramafic magmatic event,with the former within the Cathaysia Block and the latter along the southeast margin of yangtze *** suture between the yangtze and Cathaysia blocks must be located between Yingyangguan of northeastern Gua

关键词： geochronology inherited zircon Luojiashan gabbro suture Yingyangguan tectonic

Regulation of Cued Fear Expression via Corticotropin-ReleasingFactor Neurons in the Ventral Anteromedial Thalamic Nucleus

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Neuroscience Bulletin 2021年第2期37卷 217-228页

作者： Yin Lv Peng Chen qing-Hong Shan Xin-ya qin Xiu-Hong Qi Jiang-Ning zhou Hefei National Laboratory for Physical Sciences at the Microscale School of Life SciencesChinese Academy of Sciences Key Laboratory of Brain Function and DiseasesUniversity of Science and Technology of ChinaHefei 230027China Center for Excellence in Brain Science and Intelligence Technology Chinese Academy of SciencesShanghai 200031China

The ventral part of the anteromedial thalamic nucleus(AMv)is in a position to convey information to the cortico-hippocampal-amygdalar circuit involved in the processing of fear ***-releasing-factor(CRF)neurons are closely associated with the regulation of stress and ***,few studies have focused on the role of thalamic CRF neurons in fear *** the present study,using a conditioned fear paradigm in CRF transgenic mice,we found that the c-Fos protein in the AMv CRF neurons was significantly increased after cued fear *** activation of AMv CRF neurons enhanced cued fear expression,whereas inhibition had the opposite effect on the cued fear ***,chemogenetic manipulation of AMv CRF neurons did not affect fear acquisition or contextual fear *** addition,anterograde tracing of projections revealed that AMv CRF neurons project to wide areas of the cerebral cortex and the limbic *** results uncover a critical role of AMv CRF neurons in the regulation of conditioned fear memory.

关键词： Corticotropin-releasing-factor neurons Ventral anteromedial thalamic nucleus Cued fear expression Chemogenetics