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Current Medical Science 2024年第2期44卷 441-449页

作者： Bei-bei WANG li HU Xin-yue HU Dong HAN Jing WU department of Anesthesiology Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan430022China Institute of Anesthesia and Critical Care Medicine Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan430022China Key Laboratory of Anesthesiology and Resuscitation(Huazhong university of Science and Technology) Ministry of EducationWuhan430022China

Objective:This study aimed to explore the risk factors and outcomes of hypokalemia during the recovery period from anesthesia in the gynecological ***:This retrospective cohort study included 208 patients who underwent gynecological surgery at our institution between January 2021 and March *** were collected for each patient,including demographics,disease status,surgical data,and clinical *** bowel preparation,postoperative gastrointestinal function,and electrolyte levels were compared between the two groups using propensity score matching(PSM).Results:The incidence of hypokalemia(serum potassium levelnormal serum potassium ***:Hypokalemia during postanesthesia recovery period occurred in 43.75%of gynecological patients,which resulted from preoperative mechanical bowel preparation;however,it did not directly affect clinical outcomes,including postoperative gastrointestinal function,postoperative complications,and length of hospital stay.

关键词： hypokalemia gynecological surgery postanesthesia recovery perioperative electrolyte disturbances postoperative recovery

On E-Unitary Regular Semigroups

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Acta Mathematica Sinica,English Series 2002年第3期18卷 565-578页

作者： Yong Hua li department of mathematics. South, china normal university. Guangzhou 510631, P. R. china department of mathematics South China Normal University Guangzhou P. R. China

In this paper we define a concept of a PO-sextet and describe a structure of E-unitary regular semigroups.

关键词： Orthodox semigroup E-unitary regular semigroup Sextet-set PO-semigroup

On characterizations of isometries on function spaces

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Science china mathematics 2008年第4期51卷 620-631页

作者： li SongYing~(1+) RUAN YingBin~2 1 department of mathematics university of California Irvine CA 92697 USA 2 School of mathematics and Computer Science Fujian normal university Fuzhou 350007 china 1. department of mathematics University of California Irvine CA 92697 USA 2. School of mathematics and Computer Science Fujian Normal University Fuzhou 350007 China

The paper gives characterization for an isometric isomorphism on little Bloch space, VMOA and holomorphic Besov space over the unit ball B n in ? n .

关键词： ismometry Besov spaces 32A17 47A15

Complex variable method for plane elasticity of icosahedral quasicrystals and elliptic notch problem

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Science china(Physics,Mechanics & Astronomy) 2008年第7期51卷 773-780页

作者： li lianHe1,2 & FAN TianYou1 1 department of Physics, Beijing Institute of Technology, Beijing 100081, china 2 College of mathematics Science, Inner Mongolia normal university, Hohhot 010022, china department of Physics Beijing Institute of Technology Beijing 100081 China College of mathematics Science Inner Mongolia Normal University Hohhot 010022 China

The complex variable method for the plane elasticity theory of icosahedral quasicrystals is developed. Based on the general solution obtained previously, complex representations of stress and displacement components of phonon and phason fields in the quasicrystals are given. With the help of conformal transformation, an analytic solution for the elliptic notch problem of the material is presented. The solution of the Griffith crack problem can be observed as a special case of the results. The stress intensity factor and energy release rate of the crack are also obtained.

关键词： icosahedral quasicrystals plane elasticity elliptic notch complex variable method

De Morgan Algebra of Metric Ⅲ

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模糊系统与数学 1998年第3期 26-29页

作者： li Qingguo (department of Applied mathematics ,hunan university ,changsha , 410082 )

ＤｅＭｏｒｇａｎＡｌｇｅｂｒａｏｆＭｅｔｒｉｃⅢＤｅＭｏｒｇａｎＡｌｇｅｂｒａｏｆＭｅｔｒｉｃⅢＬｉＱｉｎｇｇｕｏ（ＤｅｐａｒｔｍｅｎｔｏｆＡｐｐｌｉｅｄＭａｔｈｅｍａｔｉｃｓ，ＨｕｎａｎＵｎｉｖｅｒｓｉｔｙ，Ｃｈａ... 详细信息

ＤｅＭｏｒｇａｎＡｌｇｅｂｒａｏｆＭｅｔｒｉｃⅢＤｅＭｏｒｇａｎＡｌｇｅｂｒａｏｆＭｅｔｒｉｃⅢＬｉＱｉｎｇｇｕｏ（ＤｅｐａｒｔｍｅｎｔｏｆＡｐｐｌｉｅｄＭａｔｈｅｍａｔｉｃｓ，ＨｕｎａｎＵｎｉｖｅｒｓｉｔｙ，Ｃｈａｎｇｓｈａ，４１００８２）Ａｂｓｔ...

关键词： normal Dense Contraction mapping Fuzzy contraction mapping Fuzzy topology

Combined perturbation bounds:Ⅱ.Polar decompositions

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Science china mathematics 2007年第9期50卷 1339-1346页

作者： Wen li~(1+) Wei-wei SUN~2 1 School of Mathematical Sciences,South china normal university,Guangzhou 510631,china 2 department of mathematics,City university of Hong Kong,Hong Kong,china School of Mathematical Sciences South China Normal University Guangzhou China department of mathematics City University of Hong Kong Hong Kong China

In this paper,we study the perturbation bounds for the polar decomposition A=QH where Q is unitary and H is *** optimal (asymptotic) bounds obtained in previous works for the unitary factor,the Hermitian factor and singular values of A areσ_r^2||ΔQ||_F^2≤||ΔA||_F^2, 1/2||ΔH||_F^2≤||ΔA||_F^2 and ||Δ∑||_F^2≤||ΔA||_F^2,respectively,where∑=diag(σ_1,σ_2,...,σ_r,0,...,0) is the singular value matrix of A andσ_r denotes the smallest nonzero singular *** we present some new combined (asymptotic) perturbation boundsσ_r^2||ΔQ||_F^2+1/2||ΔH||_F^2≤||ΔA||_F^2 andσ_r^2||ΔQ||_F^2+||Δ∑||_F^2≤||ΔA||_F^2 which are optimal for each *** corresponding absolute perturbation bounds are also given.

关键词： polar decomposition perturbation singular value

JACOBI SPECTRAL METHODS FOR MULTIPLE- DIMENSIONAL SINGULAR DIFFERENTIAL EQUATIONS

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Journal of Computational mathematics 2003年第3期21卷 325-338页

作者： li-Han Wang Ben-yu Guo (department of mathematics, Shanghai normal university, Shanghai 200234, china) department of mathematics Shanghai Normal University 上海 200234

Jacobi polynomial approximations in multiple dimensions are investigated. They are applied to numerical solutions of singular differential equations. The convergence analysis and numerical results show their advantages.

关键词： Jacobi approximations Multiple dimensions.

Dynamical understanding of loop soliton solution for several nonlinear wave equations

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Science china mathematics 2007年第6期50卷 773-785页

作者： Ji-bin li department of mathematics, Zhejiang normal university, Jinhua 321004, china Kunming university of Science and Technology, Kunming 650093, china department of mathematics Zhejiang Normal University Jinhua 321004 China Kunming university of Science Technology Kunming 650093 China

It has been found that some nonlinear wave equations have one-loop soliton solutions. What is the dynamical behavior of the so-called one-loop soliton solution? To answer this question, the travelling wave solutions for four nonlinear wave equations are discussed. Exact explicit parametric representations of some special travelling wave solutions are given. The results of this paper show that a loop solution consists of three different breaking travelling wave solutions. It is not one real loop soliton travelling wave solution.

关键词： planar dynamical system homoclinic orbit solitary wave solution one-loop soliton solution periodic wave solution bifurcation nonlinear wave equation 34C37 34C23 74J30 58Z05

Exact traveling wave solutions and dynamical behavior for the (n+1)-dimensional multiple sine-Gordon equation

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Science china mathematics 2007年第2期50卷 153-164页

Using the methods of dynamical systems for the (n + 1)-dimensional multiple sine-Gordon equation, the existences of uncountably infinite many periodic wave solutions and breaking bounded wave solutions are obtained. For the double sine-Gordon equation, the exact explicit parametric representations of the bounded traveling solutions are given. To guarantee the existence of the above solutions, all parameter conditions are determined.

关键词： nonlinear wave bifurcation exact explicit traveling wave solution double sine-Gordon equation multiple sine-Gordon equation 35B10 35L70 35Q51

Comparability and s-Comparability of Modules over Exchange Rings

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Acta Mathematica Sinica,English Series 2001年第3期17卷 481-488页

作者： Huan Yin CHEN department of mathematics,hunan normal university,changsha 410006 P.R.china E-mail:chyzxl@sparc2.hunnu.edu.cnFu An li Institute of mathematics,Academy of mathematics and System Sciences Chinese Academy of Sciences,Beijing 100080,P.R.china E-mail:fal@*** department of mathematics Human Normal University Changsha 410006 P. R. China Institute of mathematics Academy of Mathematics and System Sciences Chinese Academy Sciences Beijing 100080 P. R. China

In this paper,we investigate the comparability structure over exchange *** is shown that the subdirect product of an exchange ring with stable range one and an exchange ring satisfying the comparability is also an exchange ring satisfying the *** provides a new class of exchange rings satisfying the ***,we investigate the s-comparability over exchange *** generalizes the corresponding results of Goodearl and Chen.

关键词： Exchange ring Comparability s-comparability