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On solving equations of algebraic sum of equal powers

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Science china mathematics 2006年第9期49卷 1153-1157页

It is well known that a system of equations of sum of equal powers can be converted to an algebraic equation of higher degree via Newton's identities. This is the Viete-Newton theorem. This work reports the generalizations of the Viete-Newton theorem to a system of equations of algebraic sum of equal powers. By exploiting some facts from algebra and combinatorics,it is shown that a system of equations of algebraic sum of equal powers can be converted in a closed form to two algebraic equations, whose degree sum equals the number of unknowns of the system of equations of algebraic sum of equal powers.

关键词： algebraic sum of equal powers, Newton's identities, system of equations,roots of a polynomial.

FOURIER-CHEBYSHEV COEFFICIENTS AND GAUSS-TURAN QUADRATURE WITH CHEBYSHEV WEIGHT

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Journal of Computational mathematics 2003年第2期21卷 189-194页

作者： shijun yang xinghua wang (department of mathematics, zhejiang university, hangzhou 310028, china) department of mathematics Zhejiang University Hangzhou 310028

The main purpose of this paper is to derive an explicit expression for Fourier-Chebyshevcoefficientwhich is initiated by *** and***.

关键词： Fourier-Chebyshev coefficient Gauss-Turan quadrature

Some results on numerical divided difference formulas

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Science china mathematics 2005年第11期48卷 1441-1450页

作者： wang xinghua,wang Heyu & Ming-Jun Lai department of mathematics, zhejiang university, hangzhou 310028, china Computing Center, zhejiang university, hangzhou 310012, china department of mathematics, university of Georgia, Athens, GA 30602-7403, USA department of mathematics Zhejiang University Hangzhou China Computing Center Zhejiang University Hangzhou China department of mathematics University of Georgia Athens USA

The remainder estimates of numerical divided difference formula are given for the functions of lower and higher smoothness, respectively. Then several divided difference formulas with super-convergence are derived wit... 详细信息

关键词： numerical divided difference remainder estimate functions of lower smoothness sufficiently smooth functions super convergence.

Lipschitz continuity of best approximations and Chebyshev centers

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Chinese Science Bulletin 1998年第3期43卷 185-188页

作者： LI Chong 1 and wang xinghua 2 1. Center for Mathematical Sciences, zhejiang university, hangzhou 310027, china 2. department of mathematics, hangzhou university, hangzhou 310028, china Center for Mathematical Sciences Zhejiang University Hangzhou China department of mathematics Hangzhou University Hangzhou China

The Lipschitz continuity results are given for best approximations and Chebyshev centers. Consequently, the open problem presented by Septycki and Vleck is solved completely.

关键词： best approximation Chebyshev center uniform convexity.

Local and global behavior for algorithms of solving equations

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Chinese Science Bulletin 2001年第6期46卷 441-448,529页

作者： wang xinghua & LI Chongdepartment of mathematics, zhejiang university, hangzhou 310028, china Academy of mathematics and System Sciences, Chinese Academy of Sciences, Beijing 100080, china department of Applied mathematics, Southeast university, Nanjing 210096, china department of mathematics Zhejiang University Hangzhou China Academy of mathematics and System Sciences Chinese Academy of Sciences Beijing China department of Applied mathematics Southeast University Nanjing China

The theory of 'point estimate' and the concept of 'general convergence', which were put forward by Smale in order to investigate the complexity of algorithms for solving equations, have been producing a deep impact on the research about the local behavior, the semi-local behavior and the global behavior of iteration methods. The criterion of point estimate introduced by him not only provides a tool for quantitative analysis of the local behavior but also motivates the establishing of the unified determination for the semi-local behavior. Studying the global behavior in the view of discrete dynamical system will lead to many profound research subjects and open up a rich and colorful prospect. In this review, we will make a summarization about the research progress and some applications in nonsmooth optimizations.

关键词： Banach space nonlinear operator equation point esti-mate Sullivan domain nonsmooth optimization.

Defect Engineering and Carbon Supporting to Achieve Ni‑Doped CoP_(3) with High Catalytic Activities for Overall Water Splitting

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Nano-Micro Letters 2024年第11期16卷 569-584页

作者： Daowei Zha Ruoxing wang shijun Tian Zhong‑Jie Jiang Zejun Xu Chu Qin Xiaoning Tian Zhongqing Jiang department of Physics Zhejiang Sci-Tech UniversityHangzhou 310018People’s Republic of China department of Materials and Chemical Engineering Ningbo University of TechnologyNingbo 315211People’s Republic of China Guangzhou Key Laboratory for Surface Chemistry of Energy Materials Guangdong Engineering and Technology Research Center for Surface Chemistry of Energy MaterialsCollege of Environment and EnergySouth China University of TechnologyGuangzhou 510006People’s Republic of China

This work reports the use of defect engineering and carbon supporting to achieve metal-doped phosphides with high activities and stabilities for the hydrogen evolution reaction(HER)and the oxygen evolution reaction(OER)in alkaline ***,the nitrogen-doped carbon nanofiber-supported Ni-doped CoP_(3) with rich P defects(Pv·)on the carbon cloth(p-NiCoP/NCFs@CC)is synthesized through a plasma-assisted phosphorization *** p-NiCoP/NCFs@CC is an efficient and stable catalyst for the HER and the *** only needs overpotentials of 107 and 306 mV to drive 100 mA cm^(-2) for the HER and the OER,*** catalytic activities are higher than those of other catalysts reported *** high activities of the p-NiCoP/NCFs@CC mainly arise from its peculiar structural *** density functional theory calculation indicates that the Pv·richness,the Ni doping,and the carbon supporting can optimize the adsorption of the H atoms at the catalyst surface and promote the strong electronic couplings between the carbon nanofiber-supported p-NiCoP with the surface oxide layer formed during the OER *** gives the p-NiCoP/NCFs@CC with the high activities for the HER and the *** used in alkaline water electrolyzers,the p-NiCoP/NCFs@CC shows the superior activity and excellent stability for overall water splitting.

关键词： Plasma Electrocatalysis Hydrogen evolution reaction Oxygen evolution reaction Water splitting

The Chinese guideline for management of snakebites

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World Journal of Emergency Medicine 2024年第5期15卷 333-355页

作者： Rongde Lai Shijiao Yan shijun wang Shuqing yang Zhangren Yan Pin Lan Yonggao wang Qi Li Jinlong wang Wei wang Yuefeng Ma Zijing Liang Jianfeng Zhang Ning Zhou Xiaotong Han Xinchao Zhang Mao Zhang Xiaodong Zhao Guoqiang Zhang Huadong Zhu Xuezhong Yu Chuanzhu Lyu Emergency department the First Affi liated Hospital of Guangzhou Medical UniversityGuangzhou 510120China School of Public Health Hainan Medical UniversityHaikou 571199China Surgery department of Traditional Chinese Medicine the Affi liated People’s Hospital of Fujian University of Traditional Chinese MedicineFuzhou 350004China Emergency department Chongqing University Central Hospital/Chongqing Emergency Medical CenterChongqing 400014China department of Surgery of Traditional Chinese Medicine Affi liated Hospital of Jiangxi University of Chinese MedicineNanchang 330006China department of Emergency Medicine the Fifth Affi liated Hospital of Wenzhou Medical University/Lishui Central HospitalLishui Hospital of Zhejiang UniversityLishui 323000China General Surgery department the First Affi liated Hospital of Zhejiang Chinese Medical UniversityHangzhou 310006China Emergency department Shengli Clinical Medical College of Fujian Medical UniversityFuzhou 350001China Emergency department Chongqing University Fuling HospitalChongqing UniversityChongqing 408000China Emergency department the First Affi liated Hospital of Guangxi Medical UniversityNanning 530021China Emergency department the Second Affi liated Hospital of Zhejiang University School of MedicineHangzhou 310009China Emergency department Wuming Hospital of Guangxi Medical UniversityNanning 530021China Emergency department Central People's Hospital of ZhanjiangZhanjiang 524037China Emergency department Hunan Provincial People's HospitalChangsha 410005China Emergency department National Geriatrics Center of Beijing HospitalBeijing 100020China Emergency department the Fourth Medical Center of the PLA General HospitalBeijing 100048China Emergency department China-Japan Friendship HospitalBeijing 100029China Emergency department Peking Union Medical College HospitalBeiJing 100730China Emergency department Sichuan Academy of Medical Sciences/Sichuan Provincial People's HospitalChengdu 610072China Research Unit of Island Emergency

In 2009,the World Health Organization included snakebite on the list of neglected tropical diseases,acknowledging it as a common occupational hazard for farmers,plantation workers,and others,causing tens of thousands of deaths and chronic physical disabilities every *** guideline aims to provide practical information to help clinical professionals evaluate and treat snakebite *** recommendations are based on clinical experience and clinical research *** guideline focuses on the following topics:snake venom,clinical manifestations,auxiliary examination,diagnosis,treatments,and prevention.

关键词： Snakebite Envenomation Management Prevention

Methods of Studying Petroleum Systems in Residual Basins-A Case Study of Mesozoic and Palaeozoic MarineBasins in Southern china

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Acta Geologica Sinica(English Edition) 2002年第2期76卷 205-220页

作者： ZHAO Zongju, ZHU Yan, yang Shufeng, wang Genghai,XU Yunjun, FENG Jialiang and DENG Hongying department of Geoscience, zhejiang university, hangzhou 310027, zhejiang hangzhou Institute of Petroleum Geology, hangzhou 310023, zhejiang Zhou Jian Fei Zhenbi zhejiang Univ Dept Geosci Hangzhou 310027 Peoples R China hangzhou Inst Petr Geol Hangzhou 310023 Peoples R China

Through an integrated study of Mesozoic and Palaeozoic petroleum geology insouthern china and a summing-up of the results of exploration, the authors tentatively put forward aset of methods of studying petroleum systems in modified residual basins or superposed basins. Itscore idea is to put emphasis on the study of the dynamic evolution of petroleum systems. Thetempo-spatial evolution, hydrocarbon-generating processes and hydrocarbon-generating intensities andamounts of resources in different geological stages of chief source rocks are mainly deducedbackward by 3-D basin modelling. The regularities of formation and destruction of oil and gasaccumulations are summarized by analyzing the fossil and existing oil and gas accumulations, thedirection of migration is studied by palaeo-structural analysis, and the dynamic evolution ofPalaeozoic and Mesozoic petroleum systems in southern china is studied according to stages of majortectonic movements. The authors suggest that the realistic exploration targets of Palaeozoic andMesozoic petroleum systems in southern china are secondary and hydrocarbon-regeneration petroleumsystems, while the existing primary petroleum systems are rare. They propose that the favourableareas for exploration of Palaeozoic and Mesozoic petroleum systems in southern china are the frontarea of the Daba Mountains and the steep anticlinal zone on the western side of the Shizhusynclinorium in northeastern Sichuan, the Funin-Yancheng-Hai'an-xinghua-Baoying area in the northernJiangsu basin, the Qianjiang-Xiantao-Paizhou-Chacan 1 well area in the southern part of the Chenhuarea of the Jianghan basin, the South Poyang basin in Jiangxi and the North subbasin of the Chuxiongbasin. This view has been supported by the discovery of the Zhujiadun gas field in the Yanchengsubbasin of the northern Jiangsu basin and the Kaixiantaixi oil-bearing structure in the southernpart of the Chenhu area of the Jianghan basin.

关键词： residual basin superposed basin petroleum system marine basin southern china

Chinese expert consensus on the diagnosis and treatment of balanoposthitis

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Chinese Medical Journal 2024年第13期137卷 1519-1521页

作者： Li Zhang Amer A.A.Abdulrahman Hao Guo Jia’an Zhang xinghua Gao Weihua Pan Gang wang Jinhua Xu Yuling Shi Liuqing Chen Hongxiang Chen Songmei Geng Yuping Ran Hongwei wang Xiaoyong Man Jianmin Chang Furen Zhang Litao Zhang Guangwen Yin Jianzhong Zhang Wei Lai Zhibin Niu Hongkun Jiang Haibo Liu Yaolong Chen Jianjian wang department of Dermatology The First Hospital of China Medical UniversityShenyangLiaoning 110001China Key Laboratory of Immunodermatology Ministry of Education and NHCNational Joint Engineering Research Center for Theranostics of Immunological Skin DiseasesShenyangLiaoning 110001China department of Dermatology Chinese Academy of Medical Science and Peking Union Medical CollegeNanjingJiangsu 210042China department of Dermatology Second Affiliated Hospital of Naval Medical UniversityShanghai 200003China department of Dermatology Xijing HospitalFourth Military Medical UniversityXi’anShaanxi 710032China department of Dermatology Huashan HospitalFudan UniversityShanghai 200040China department of Dermatology Shanghai Skin Disease HospitalTongji University School of MedicineShanghai 200443China department of Dermatology Wuhan No.1 HospitalWuhanHubei 430022China department of Dermatology Huazhong University of Science and Technology Union Shenzhen HospitalShenzhenGuangdong 518052China department of Dermatology Second Affiliated Hospital of Xi’an Jiaotong UniversityXi’anShaanxi 710004China department of Dermatovenereology West China HospitalSichuan UniversityChengduSichuan 610041China department of Dermatology Huadong HospitalFudan UniversityShanghai 200040China department of Dermatology Second Affiliated HospitalZhejiang University School of MedicineHangzhouZhejiang 310009China department of Dermatology Beijing HospitalBeijing 100730China Shandong Provincial Hospital for Skin Diseases&Shandong Provincial Institute of Dermatology and Venereology Shandong First Medical University&Shandong Academy of Medical SciencesJinanShandong 250061China department of Dermatology Tianjin Academy of Traditional Chinese Medicine Affiliated HospitalTianjin 300120China department of Dermatology The First Affiliated Hospital of Zhengzhou UniversityZhengzhouHenan 450052China department of Dermatology Peking University People’s HospitalBeijing 100044 China department of Dermatology Third Affi

Balanoposthitis(BP),a common male genitalia inflammation,is managed by clinicians from different specialties,including urology,pediatrics,dermatology,and *** to this diverse array of clinicians involved,there exists a lack of consistent,evidence-based recommendations for *** development of the consensus engaged 19 representative hospitals and it adhered to rigorous protocols,encompassing international registration(IPGRP-2021CN003)and the application of evidence grading criteria and recommendation standards[Appendix S1,Supplementary File,http://***/CM9/C42].Over the period from December 2020 to October 2022,consensus on 12 clinical issues was reached through comprehensive evidence searches and two iterations of Delphi surveys[Supplementary File,http://***/CM9/C42].

关键词： Delphi diagnosis rigorous