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Quadric SFDI for Laplacian Discretisation in Lagrangian Meshless Methods

Journal of Marine Science and Application 2020年第3期19卷 362-380页

作者： Shiqiang Yan Q.W.Ma Jinghua Wang School of Mathematics Computer Science and EngineeringUniversity of LondonEC1V 0HBLondonUK

In the Lagrangian meshless(particle)methods,such as the smoothed particle hydrodynamics(SPH),moving particle semi-implicit(MPS)method and meshless local Petrov-Galerkin method based on Rankine source solution(MLPG_R),the Laplacian discretisation is often required in order to solve the governing equations and/or estimate physical quantities(such as the viscous stresses).In some meshless applications,the Laplacians are also needed as stabilisation operators to enhance the pressure *** particles in the Lagrangian methods move following the material velocity,yielding a disordered(random)particle distribution even though they may be distributed uniformly in the initial *** schemes have been developed for a direct estimation of second derivatives using finite difference,kernel integrations and weighted/moving least square *** of the schemes suffer from a poor convergent *** have a better convergent rate but require inversions of high order matrices,yielding high computational *** paper presents a quadric semi-analytical finite-difference interpolation(QSFDI)scheme,which can achieve the same degree of the convergent rate as the best schemes available to date but requires the inversion of significant lower-order matrices,i.e.3×3 for 3D cases,compared with 6×6 or 10×10 in the schemes with the best convergent *** patch tests have been carried out for either estimating the Laplacian of given functions or solving Poisson’s *** convergence,accuracy and robustness of the present schemes are compared with the existing *** will show that the present scheme requires considerably less computational time to achieve the same accuracy as the best schemes available in literatures,particularly for estimating the Laplacian of given functions.

关键词： Laplacian discretisation Lagrangian meshless methods QSFDI Random/disordered particle distribution Poisson’s equation patch tests

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Chinese Expert Consensus on Clinical Application of patch Test (Revised 2020)

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International Journal of Dermatology and Venereology 2020年第3期3卷 142-147页

作者： Bang-Tao Chen Fei Hao Hong Fang Heng Gu Hong-Zhong Jin Wei Lai Cheng-Xin Li Lin-Feng Li Wei Liu Yan Lu Xin Shi Juan Tao Gang Wang Li-Ping Wen Ting Xiao Jin-Hua Xu Fu-Ren Zhang Li-Tao Zhang Zuo-Tao Zhao Hua Zhong Ying Zou The Allergic Disease Committee of Chinese Dermatologist Association Department of Dermatology The Third Affiliated Hospital of Chongqing Medical UniversityCongqing 401120China Department of Dermatology The First Affiliated HospitalZhejiang University School of MedicineHangzhouZhejiang 310006China Hospital for Skin Diseases(Institute of Dermatology) Chinese Academy of Medical Sciences and Peking Union Medical CollegeNanjingJiangsu 210042China Department of Dermatology Peking Union Medical College HospitalBeijing 100730China Department of Dermatology The Third Affiliated Hospital of Sun Yat-sen UniversityGuangzhouGuangdong 51063China Department of Dermatology First Medical Center of Chinese People’s Liberation Army General HospitalBeijing 100036China Department of Dermatology Beijing Friendship Hospital of Capital Medical UniversityBeijing 10005China Department of Dermatology Special Medicine Center of Air ForceBeijing 100621China Department of Dermatology The First Affiliated Hospital of Nanjing Medical UniversityNanjingJiangsu 210029China Department of Dermatology Second Affiliated Hospital of Suzhou UniversitySuzhouJingsu 21500China Department of Dermatology Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanHubei 430022China Xijing Hospital Fourth Military Medical UniversityXi’anShaanxi 710032China Department of Dermatology The First Hospital of China Medical UniversityShenyangLiaoning 110001China Department of Dermatology Huashan Hospital Affiliated with Fudan UniversityShanghai 200040China Department of Dermatology Dermatology Hospital of Shandong ProvinceJinanShandong 250000China Department of Dermatology Tianjin Academy of Traditional Chinese Medicine Affiliated HospitalTianjing 300120China Department of Dermatology First Hospital of Beijing UniversityBeijing 100034China Distinct Healthcare Chongqing 401147China Department of Dermatology Shanghai Dermatology HospitalShanghai 200443China 不详

Allergic contact dermatitis is a common clinical allergic *** patch test is the gold standard for finding and clarifying contact *** the deepening understanding of the epidemiology,pathogenesis,and clinical manifestations of contact dermatitis,as well as the increased requirements for the standardized application of patch tests,the relevant consensus needs to be continuously *** consensus is updated on the basis of the version issued in *** this revised version,it refines the selection of clinical indications,improves the judgment end interpretation of results,adds delayed detection and patient education,and so on,which aims to further standardize clinical applications and improve the value of patch test.

关键词： allergens allergic contact dermatitis Chinese expert consensus patch tests

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