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Horizontal-to-vertical spectral ratio inversion method based on multimodal forest optimization algorithm

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Global Geology 2024年第3期27卷 167-176页

作者： CHEN Xuanning HAN Fuxing gao zhenghui SUN Zhangqing HAN Jiangtao College of Geo-Exploration Science and Technology Jilin UniversityChangchun 130026China

The exploration of urban underground spaces is of great significance to urban planning,geological disaster prevention,resource exploration and environmental ***,due to the existing of severe interferences,conventional seismic methods cannot adapt to the complex urban environment *** adopting the single-node data acquisition method and taking the seismic ambient noise as the signal,the microtremor horizontal-to-vertical spectral ratio(HVSR)method can effectively avoid the strong interference problems caused by the complex urban environment,which could obtain information such as S-wave velocity and thickness of underground formations by fitting the microtremor HVSR ***,HVSR curve inversion is a multi-parameter curve fitting *** conventional inversion methods can easily converge to the local minimum,which will directly affect the reliability of the inversion ***,the authors propose a HVSR inversion method based on the multimodal forest optimization algorithm,which uses the efficient clustering technique and locates the global optimum *** on synthetic data show that the inversion results of the proposed method are consistent with the forward *** the adaption and stability to the abnormal layer velocity model are *** results of the real field data are also verified by the drilling information.

关键词： microtremor HVSR method multimodal forest optimization algorithm HVSR curve inversion

Horizontal-to-vertical spectral ratio inversion method based on multimodal forest optimization algorithm

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渤海湾盆地埕北凹陷古近系沉积体系及砂体成因类型

世界地质·英文版 2024年第3期 167页

作者： CHEN Xuanning HAN Fuxing gao zhenghui SUN Zhangqing HAN Jiangtao

来源：博看期刊评论

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古地理学报 2024年第4期26卷 834-845页

作者：许鹏连豪杰毕力格胡贺伟郜政辉姜福杰邵龙义中国石油大学(北京)地球科学学院北京102249 中海石油(中国)有限公司天津分公司天津300452 中国矿业大学(北京)地球科学与测绘工程学院北京100083

埕北凹陷是渤海湾盆地渤中坳陷内部的次级构造,其勘探潜力一直受制于对区内砂体成因类型及储集层分布规律的认识。利用钻井岩心、测井曲线及地震反射剖面等资料,对该凹陷古近系沉积特征、砂体成因类型和分布规律进行分析。研究区古近系... 详细信息

埕北凹陷是渤海湾盆地渤中坳陷内部的次级构造,其勘探潜力一直受制于对区内砂体成因类型及储集层分布规律的认识。利用钻井岩心、测井曲线及地震反射剖面等资料,对该凹陷古近系沉积特征、砂体成因类型和分布规律进行分析。研究区古近系发育扇三角洲、辫状河三角洲和湖泊等沉积相,扇三角洲主要发育在凹陷东北侧的陡坡带,岩性以具块状构造的含砾粗砂岩为主,地震反射特征主要表现为楔状的前积退积和杂乱反射,测井相主要表现为低幅齿型、齿状箱型和钟型;辫状河三角洲主要发育在凹陷西南侧的缓坡带,岩性以具交错层理的砂岩为主,地震反射特征主要表现为S形前积和叠瓦状前积,测井相主要表现为箱型、钟型和漏斗型;湖底扇受重力流控制,主要发育在凹陷中心的半深湖-深湖区,地震反射特征主要表现为蠕虫状前积反射;滩坝主要发育在湖泊边缘或中央局部隆起区,因受波浪作用控制,沉积特征表现为席状砂质沉积被泥岩包围,地震反射特征主要表现为透镜状反射,测井相主要表现为指状和漏斗型。纵向上,沙三段以辫状河三角洲、扇三角洲和湖泊沉积相为主,沙一二段以辫状河三角洲、扇三角洲和湖泊沉积为主,东三段以辫状河三角洲、扇三角洲和湖泊沉积为主,东二段以辫状河三角洲和湖泊沉积为主,扇三角洲发育规模较小。埕北凹陷古近系砂体的生成和发育主要受构造活动、源区物源供给、微古地貌形态和湖平面变化等因素控制,主要发育扇三角洲砂体、辫状河三角洲砂体、湖底扇砂体和滩坝砂体。

关键词：渤海湾盆地埕北凹陷古近系沉积相砂体成因类型

Three-dimensional dynamic sea surface modeling based on ocean wave spectrum

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Acta Oceanologica Sinica 2021年第10期40卷 38-48页

作者： Zhimiao Chang Fuxing Han Zhangqing Sun zhenghui gao Lili Wang College of Geoexploration Science and Technology Jilin UniversityChangchun 130026China Geophysical Exploration and Research Institute of Jilin Oilfield Songyuan 138006China

In conventional marine seismic exploration data processing,the sea surface is usually treated as a horizontal free ***,the sea surface is affected by wind and waves and there often exists dynamic small-range *** dynamic fluctuations will change the energy propagation path and affect the final imaging *** theoretical research,different sea surface conditions need to be described,so it is necessary to study the modeling method of dynamic undulating sea *** from the commonly used sea surface mathematical simulation methods,this paper mainly studies the realization process of simple harmonic wave and Gerstner wave sea surface simulation methods based on ocean wave spectrum,and compares their advantages and *** at the shortcomings of the simple harmonic method and Gerstner method in calculational speed and sea surface simulation effect,a method based on wave equation and using dynamic boundary conditions for sea surface simulation is *** calculational speed of this method is much faster than the commonly used simple harmonic method and Gerstner wave *** addition,this paper also compares the new method with the more commonly used higher-order spectral methods to show the characteristics of the improved wave equation method.

关键词： sea surface simulation simple harmonic Gerstner wave wave equation ocean wave spectrum high-order spectral method

Achieving exceptional activity and durability toward oxygen reduction based on a cobalt-free perovskite for solid oxide fuel cells

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Journal of Energy Chemistry 2021年第11期30卷 653-659,I0016页

作者： Feifei Dong zhenghui gao Bingkai Zhang Lu Li Ziqi Kong Zilin Ma Meng Ni Zhan Lin Guangzhou Key Laboratory of Clean Transportation Energy Chemistry School of Chemical Engineering and Light IndustryGuangdong University of TechnologyGuangzhou Higher Education Mega CenterGuangzhou 510006GuangdongChina Building Energy Research Group Department of Building and Real EstateThe Hong Kong Polytechnic UniversityHung HomKowloonHong Kong 999077China

In response to the shortcomings of cobalt-rich cathodes, iron-based perovskite oxides appear as promising alternatives for solid oxide fuel cells (SOFCs). However, their inferior electrochemical performance at reduced temperatures (<700 ℃) becomes a major bottleneck for future progress. Here, a novel cobalt-free perovskite Ba_(0.75)Sr_(0.25)Fe_(0.875)Ga_(0.125)O_(3−δ) (BSFG) is developed as an efficient oxygen reduction electrode for SOFCs, featuring cubic-symmetry structure, large oxygen vacancy concentration and fast oxygen transport. Benefiting from these merits, cells incorporated with BSFG achieve exceptionally high electrochemical performance, as evidenced by a low polarization area-specific resistance of 0.074 Ω cm^(2) and a high peak power density of 1145 mW cm^(−2) at 600 ℃. Meanwhile, a robust short-term performance stability of BSFG cathode can be ascribed to the stable crystalline structure and favorable thermal expansion behavior. First-principles computations are also conducted to understanding the superior activity and durability toward oxygen reduction reaction. These pave the way for rationally developing highly active and robust cobalt-free perovskite-type cathode materials for reduced-temperature SOFCs.

关键词： Solid oxide fuel cell Cathode Perovskite Oxygen reduction reaction Cobalt-free

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砀山酥梨炭疽病病原鉴定和检测及致病性分析

植物病理学报 2024年第3期54卷 648-653页

作者：周贝贝高正辉杨雪石旺鹏齐永杰马娜阚丽平徐义流中国农业大学植物保护学院北京100193 安徽省农业科学院园艺研究所合肥230001 安徽省农业科学院植物保护与农产品质量安全研究所合肥230001 园艺作物种质创制及生理生态安徽省重点实验室合肥230001 农业农村部园艺作物种质创制与利用重点实验室(部省共建) 合肥230001

0引言。梨炭疽病亦称苦腐病、晚腐病,自2008年在黄河故道梨产区爆发以来普遍发生,近年受气候变化、菌源累积、管理方式等因素影响,已成为安徽省砀山县及周边梨产区的主要病害之一。此病主要危害果实引起果腐,严重影响梨的产量和品质,给... 详细信息

0引言。梨炭疽病亦称苦腐病、晚腐病,自2008年在黄河故道梨产区爆发以来普遍发生,近年受气候变化、菌源累积、管理方式等因素影响,已成为安徽省砀山县及周边梨产区的主要病害之一。此病主要危害果实引起果腐,严重影响梨的产量和品质,给砀山县梨产业造成了极大的经济损失[1]。

关键词：梨产区病原鉴定黄河故道果腐晚腐病苦腐病菌源梨炭疽病

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Diversity of metabolite accumulation patterns in inner and outer seed coats of pomegranate:exploring their relationship with genetic mechanisms of seed coat development

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Horticulture Research 2020年第1期7卷 2634-2647页

作者： Gaihua Qin Chunyan Liu Jiyu Li Yongjie Qi zhenghui gao Xiaoling Zhang Xingkai Yi Haifa Pan Ray Ming Yiliu Xu Key Laboratory of Genetic Improvement and Ecophysiology of Horticultural Crops Anhui ProvinceHorticultural Research InstituteAnhui Academy of Agricultural SciencesHefei 230001China Key Laboratory of Fruit Quality and Development Biology Anhui Academy of Agricultural SciencesHefei 230001China FAFU and UIUC-SIB Joint Center for Genomics and Biotechnology Fujian Agriculture and Forestry UniversityFuzhou 350002China Department of Plant Biology University of Illinois at Urbana-ChampaignUrbanaIL 61822USA

The expanded outer seed coat and the rigid inner seed coat of pomegranate seeds,both affect the sensory qualities of the fruit and its acceptability to *** seeds are also an appealing model for the study of seed coat differentiation and *** conducted nontarget metabolic profiling to detect metabolites that contribute to the morphological differentiation of the seed coats along with transcriptomic profiling to unravel the genetic mechanisms underlying this *** of metabolites in the lignin biosynthetic pathway accumulating in seed coat layers at different developmental stages revealed that monolignols,including coniferyl alcohol and sinapyl alcohol,greatly accumulated in inner seed coats and monolignol glucosides greatly accumulated in outer seed *** expression of genes involved in monolignol biosynthesis and transport might explain the spatial patterns of biosynthesis and accumulation of these *** constituents and flavonoids in particular accumulated in the inner seed coat,and candidate genes that might be involved in their accumulation were also *** encoding transcription factors regulating monolignol,cellulose,and hemicellulose metabolism were chosen by coexpression *** results provide insights into metabolic factors influencing seed coat differentiation and a reference for studying seed coat developmental biology and pomegranate genetic improvement.

关键词： outer mechanisms alcohol

Existence and Uniqueness of Solutions to Impulsive Fractional Integro-Differential Equations with Nonlocal Conditions

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Applied Mathematics 2013年第6期4卷 859-863页

作者： zhenghui gao Liu Yang Gang Liu Department of Mathematics and Computational Science Hengyang Normal University Hengyang China

In this article, by using Schaefer fixed point theorem, we establish sufficient conditions for the existence and uniqueness of solutions for a class of impulsive integro-differential equations with nonlocal conditions... 详细信息

关键词： Caputo Fractional Derivative Impulses Nonlocal Conditions Existence Uniqueness Fixed Point

Research on ray tracing in VTI medium based on different models

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Global Geology 2015年第4期18卷 245-251页

作者： JI Songda SUN Jianguo gao zhenghui SUN Hui WANG Qianlong HUANG Xinguo College of Geo-Exploration Science and Technology Jilin University

The study on seismic anisotropy is one of the difficult problems in the field of geophysics *** a method of ray theory,the seismic anisotropy ray tracing is an important means to study the anisotropic seismic wave propagation. The traditional ray tracing system formulated in terms of elastic parameters in the anisotropy is more complicated than that in the isotropic case. Considering the difficulty,a kind of ray tracing system formulated in terms of phase velocity and group velocity is introduced. The new method is similar to the expressions for isotropic media,and avoids the trouble of determining the eigenvalue vector at each time. Besides the ray tracing numerical simulation of different models of vertical transversely isotropic( VTI) medium is carried out,in order to verify the accuracy and applicability of the method and further study the characteristics of wave field propagation in different VTI mediums. The study is certainly valuable in reference for later processing of the anisotropic seismic data.

关键词： VTI medium ray tracing phase velocity model trial