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NATURAL BOUNDARY ELEMENT METHOD FOR THREE DIMENSIONAL EXTERIOR HARMONIC PROBLEM WITH AN INNER PROLATE SPHEROID BOUNDARY

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Journal of Computational Mathematics 2006年第2期24卷 193-208页

作者： Hong-ying Huang De-hao Yu LSEC ICMSEC Academy of Mathematics and System Sciences Chinese Academy of Sciences Beijing 100080 China

In this paper, we study natural boundary reduction for Laplace equation with Dirichlet or Neumann boundary condition in a three-dimensional unbounded domain, which is the outside domain of a prolate spheroid. We express the Poisson integral formula and natural integral operator in a series form explicitly. Thus the original problem is reduced to a boundary integral equation on a prolate spheroid. The variational formula for the reduced problem and its well-posedness are discussed. Boundary element approximation for the variational problem and its error estimates, which have relation to the mesh size and the terms after the series is truncated, are also presented. Two numerical examples are presented to demonstrate the effectiveness and error estimates of this method.

关键词： Natural boundary reduction Prolate spheroid boundary Finite element Exterior harmonic problem.

Deep eutectic solvent strategy enables an octahedral Ni–Co precursor for creating high-performance NiCo_(2)O_(4) catalyst toward oxygen evolution reaction

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Green Energy & Environment 2022年第6期7卷 1217-1227页

作者： Chenyun Zhang Bingwei Xin Tingting Chen hao ying Zhonghao Li Jingcheng hao Key Laboratory of Colloid and Interface Chemistry Ministry of EducationShandong UniversityJinan250100China College of Chemistry and Chemical Engineering Dezhou UniversityDezhou253023China

Deep eutectic solvents(DESs)have gained much attention in the fabrication of advanced nanoelectrocatalysts due to their amazing template ***,their stabilizing function for easily hydrolyzed inorganic nanomaterials is rarely ***,a DES-mediated strategy was reported to synthesize octahedral Ni–Co precursor(NiCo–NH_(3) complex),which could be directly transformed into NiCo_(2)O_(4) nanooctahedrons after thermal *** NiCo–NH_(3) precursor in octahedral shape was achieved with the DES-mediated crystallization in the choline chloride(ChCl)/*** ChCl/glycerol DES not only tailored the morphology of the as-prepared precursor by template effect but also inhibited its hydrolysis,ensuring the successful fabrication of octahedral NiCo–NH_(3) complex precursor with high *** NiCo–NH_(3) complex precursor was converted to well-defined NiCo_(2)O_(4) nanooctahedrons,where the calcination temperature and time were explored in *** revealed that DES could participate in the conversion process to control the morphology of calcination *** resultant NiCo_(2)O_(4) nanooctahedrons demonstrated excellent electroactivity and remarkable durability for oxygen evolution reaction(OER).The present strategy not only offers an efficient OER electrocatalyst but also enriches the approaches of DESs in designing advanced nanocatalysts.

关键词： Deep eutectic solvents Choline chloride Glycerol Oxygen evolution reaction

Thyroid hormone action in metabolic regulation

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Protein & Cell 2011年第5期2卷 358-368页

作者： Yiyun Song Xuan Yao hao ying Key Laboratory of Nutrition and Metabolism Institute for Nutritional SciencesShanghai Institutes for Biological SciencesGraduate School of the Chinese Academy of SciencesChinese Academy of SciencesShanghai 200031China

Thyroid hormone plays pivotal roles in growth,differentiation,development and metabolic homeostasis via thyroid hormone receptors(TRs)by controlling the expression of TR target *** transcriptional activity of TRs is modulated by multiple factors including various TR isoforms,diverse thyroid hormone response elements,different heterodimeric partners,coregulators,and the cellular location of *** the present review,we summarize recent advance in understanding the molecular mechanisms of thyroid hormone action obtained from human subject research,thyroid hormone mimetics application,TR isoform-specific knock-in mouse models,and mitochondrion study with highlights in metabolic ***,as future perspectives,we share our thoughts about current challenges and possible approaches to promote our knowledge of thyroid hormone action in metabolism.

关键词： thyroid hormone thyroid hormone receptor metabolic regulation central and peripheral effect thyroid diseases

Path-Following Control With Obstacle Avoidance of Autonomous Surface Vehicles Subject to Actuator Faults

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IEEE/CAA Journal of Automatica Sinica 2024年第4期11卷 956-964页

作者： Li-ying hao Gege Dong Tieshan Li Zhouhua Peng the School of Marine Electrical Engineering Dalian Maritime UniversityDalian 116026China the School of Automation Engineering University of Electronic Science and Technology of ChinaChengdu 611731the Navigation CollegeDalian Maritime UniversityDalian 116026 the Yangtze Delta Region Institute(Huzhou) Huzhou 313001China

This paper investigates the path-following control problem with obstacle avoidance of autonomous surface vehicles in the presence of actuator faults,uncertainty and external *** surface vehicles inevitably suffer from actuator faults in complex sea environments,which may cause existing obstacle avoidance strategies to *** reduce the influence of actuator faults,an improved artificial potential function is constructed by introducing the lower bound of actuator efficiency *** nonlinear state observer,which only depends on measurable position information of the autonomous surface vehicle,is used to address uncertainties and external *** using a backstepping technique and adaptive mechanism,a path-following control strategy with obstacle avoidance and fault tolerance is designed which can ensure that the tracking errors converge to a small neighborhood of *** with existing results,the proposed control strategy has the capability of obstacle avoidance and fault tolerance ***,the comparison results through simulations are given to verify the effectiveness of the proposed method.

关键词： Actuator faults autonomous surface vehicle(ASVs) improved artificial potential function nonlinear state observer obstacle avoidance

An Extreme Gale Event in East China under the Arctic Potential Vorticity Anomaly through the Northeast China Cold Vortex

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Advances in Atmospheric Sciences 2023年第12期40卷 2169-2182页

作者： Wei TAO Linlin ZHENG ying hao Gaoping LIU Anhui Meteorology Observatory Hefei 230031China

Arctic changes influence not only temperature and precipitation in the midlatitudes but also contribute to severe *** study investigates an extreme gale event that occurred on 30 April 2021 in East China and was forced by an Arctic potential vorticity(PV)anomaly *** advection steered by storms contributed to the equatorward propagation of Arctic high PV,forming the Northeast China cold vortex(NCCV).At the upper levels,a PV southward intrusion guided the combination of the polar jet and the subtropical jet,providing strong vertical wind shear and downward momentum transportation to the *** PV anomaly cooled the upper troposphere and the northern part of East China,whereas the lower levels over southern East China were dominated by local warm air,thus establishing strong instability and *** addition,the entrainment of Arctic dry air strengthened the surface pressure gradient by evaporation *** the above mechanism has the potential to improve convective weather forecasts under climate *** study suggests that the more frequent NCCV-induced gale events in recent years are partly due to high-latitude waviness and storm activities,and this hypothesis needs to be investigated using more cases.

关键词： PV anomaly Arctic storm Northeast China cold vortex convection extreme gale

Investigating intratumour heterogeneity by single-cell sequencing

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Asian Journal of Andrology 2013年第6期15卷 729-734,I0005页

作者： Shan-Cheng Ren Min Qu ying-hao Sun Department of Urology Shanghai Changhai Hospital Second Military Medical University Shanghai 200433 China

Intratumour heterogeneity is a longstanding field of focus for both researchers and clinicians. It refers to the diversity amongst cells within the same tumour. Two major hypotheses have attempted to explain the existence of intratumour heterogeneity：（i） the clonal evolution （CE） theory and （ii） the cancer stem cell （CSC） model. CE theory emphasizes the evolutionary biological characteristics of the tumour, underscoring the initiation and progression of the disease. In contrast, the CSC model focuses on stem cell differentiation into distinct functions in order to stabilize the tumour microenvironment. Here we consider single-cell sequencing （SCS） as a newly developed technique for application to the investigation of intratumour heterogeneity and assess its relevance within research and clinical environments. Early detection of rare tumour cells, monitoring of circulating tumour cells （CTCs） and control of the occurrence of drug resistance are imoortant goals in early diagnosis, prognosis prediction and individualized medicine.

关键词： clinical applications intratumour heterogeneity single-cell sequencing

Homonyms Discovery in Folksonomy Based on User Community Analysis

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Journal of Electronic Science and Technology 2016年第3期14卷 275-280页

作者： Shi-Min Shan Yi Cui ying-hao He School of Software Dalian University of TechnologyDalian 116024China the school of management dalian university of technologyDalian 116024China

to the capability of reflecting social perception on semantic of resources, folksonomy has been proposed to improve the social learning for education and scholar researching. However, its actual impact is significantly influenced by the semantic ambiguity problem of tags. So, in this paper, we proposed a novel way of detecting homonyms, one of the main sources of tag＇s semantic ambiguity problem, in noisy folksonomies. The study is based on two hypotheses： 1） Users having different interests tend to have different understanding of the same tag. 2） Users having similar interest tend to have common understanding of the same tag. Therefore, we firstly discover user communities according to users＇ interests. Then, tag contexts are discovered in subsets of folksonomy on the basis of user communities. The experimental results show that our method is effective and outperform the method finding tag contexts using all tags in folksonomy with overlapping clustering algorithm especially when various users having different interests are contained by the folksonomyo

关键词： Community detection Folksonomy semantic ambiguity homonym.

BiOCl nanostructures with different morphologies:Tunable synthesis and visible-light-driven photocatalytic properties

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Chinese Chemical Letters 2015年第1期26卷 133-136页

作者： Hong-ying hao Yan-Yan Xu Ping Liu Guo-ying Zhang Tianjin Key Laboratory of Structure and Performance for Functional Molecule Laboratory of Inorganic-Organic Hybrid Functional Material ChemistryMinistry of EducationSchool of ChemistryTianjin Normal University

BiOCl nanostructures including microspheres,microflowers,microplates,and nanoplates,have been synthesized by a simple solvothermal method using bismuth nitrate and sodium chloride as raw materials without adding any *** and morphology of the products were characterized by powder X-ray diffraction,scanning electron microscopy,and transmission electron *** results indicated that the as-prepared microspheres and microflowers were composed of *** with different shape and lateral size,the nanoplates and microplales were all single-crystalline plates with exposed {001） *** was found that the volume ratio of polyethylene glycol 400 and H_2O in the solvent played a key role in the morphology of the products,and the possible growth mechanism was also *** photocatalytic measurements indicated that the BiOCl samples exhibit good photocatalytic properties towards Rhodamine B.

关键词： BiOCl nanostructure Crystal growth Semiconductors Photocatalytic property

One-step synthesis of defected Bi_(2)Al_(4)O_(9)/β-Bi_(2)O_(3) heterojunctions for photocatalytic reduction of CO_(2) to CO

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Green Energy & Environment 2021年第2期6卷 244-252页

作者： ying Liu Jian-guo Guo Yue Wang ying juan hao Rui-hong Liu Fa-tang Li College of Science Hebei University of Science and TechnologyShjiazhuang050018China

Defect and charge transfer efficiency of nano-photocatalysts are important factors which influence their photocatalytic *** this work,oxygen vacancies are successfully introduced in the synthesis process of Bi_(2)Al_(4)O_(9)/β-Bi_(2)O_(3)heterojunctions through one-step in situ selfcombustion ***-resolution transmission electron microscopy (HRTEM),UV-Vis diffuse reflectance spectra (UV-Vis DRS),and electron spin resonance (ESR) measurements confirm the existence of oxygen *** addition,by controlling the ratio of reactants of Bi(NO_(3))_(3)to Al(NO_(3))_(3),the ratio of Bi_(2)Al_(4)O_(9)and β-Bi_(2)O_(3)in the heterojunction can be easily *** responses and surface photovoltage spectroscopy (SPV) indicate that the construction of the Bi_(2)Al_(4)O_(9)/β-Bi_(2)O_(3)heterostructure improves the separation efficiency of the photo-generated electrons and ***_(2)-TPD results imply that the amounts and stability of heterojunctions are enhanced compared with their *** Bi_(2)Al_(4)O_(9)/β-Bi_(2)O_(3)heterojunction with 14 mol%Bi_(2)Al_(4)O_(9)shows the highest photocatalytic ability for reduction of CO_(2)into *** enhanced photoreduction of CO_(2)performance can be ascribed to the synergistic effects of the heterojunction for electron separation and oxygen vacancies for CO_(2)activation.

关键词： Bi_(2)Al_(4)O_(9) β-Bi_(2)O_(3) Heterojunction Defect Photocatalytic reduction of CO_(2)