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L^s- norm Estimates of Solutions for theImhomogeneous Cauchy- Riemann Equation
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作者 吕永敬 马忠泰 《Chinese Quarterly Journal of Mathematics》 CSCD 1998年第2期10-15, ,共6页
In this paper,we discussed the local integral solution operators of imhomogeneous Cauchy Riemann equations on an open set with piecewise C k boundary in C n,as a generalization of the solution opertators for Leray map... In this paper,we discussed the local integral solution operators of imhomogeneous Cauchy Riemann equations on an open set with piecewise C k boundary in C n,as a generalization of the solution opertators for Leray map S(z,ζ) which do not depends holomorphic on z∈D in Koppelman formula is obtained and the L s norm estimates for the solution operators are the same as that [10] in forms. 展开更多
关键词 imhomogeneous Cauch Riemann equations L^s norm estimates Koppelman formula
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_b-EQUATION ON COMPLEX MANIFOLDS
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作者 钟同德 《Acta Mathematica Scientia》 SCIE CSCD 1997年第3期262-268,共7页
By using Koppelman-Leray kernel and under suitable condition the integral representation formula of equation on complex manifolds is obtained.
关键词 complex manifolds Strictly pseudoconvex domain -equation
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非均匀电离层中VLF辐射源在海面上产生的场 被引量:10
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作者 李凯 潘威炎 苗永瑞 《电波科学学报》 EI CSCD 1998年第3期265-269,共5页
用于对潜通讯的星载的ELF/VLF发射无线处于300~400km高度的电离层F2层。本文将星载的天线理想化为一偶极子,电离层看成随高度变化的非均匀各向异性等离子体,分析计算了VLF发射天线在海面上产生的场。
关键词 偶极子 非均匀 等离子体 电离层 VLF发射天线
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轻金属焊接中组织、性能和寿命演变相关基础问题 被引量:8
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作者 李晓延 巩水利 张建勋 《机械强度》 EI CAS CSCD 北大核心 2008年第6期965-972,共8页
以铝合金和钛合金的焊接为例,介绍焊缝、热影响区中的组织特征及其演变,重点介绍晶粒长大、织构和晶格畸变的规律及其影响;从焊接变形、接头硬度变化等角度分析焊接方法和工艺的影响;从焊接接头断裂行为及断裂韧度变化等方面探讨断裂机... 以铝合金和钛合金的焊接为例,介绍焊缝、热影响区中的组织特征及其演变,重点介绍晶粒长大、织构和晶格畸变的规律及其影响;从焊接变形、接头硬度变化等角度分析焊接方法和工艺的影响;从焊接接头断裂行为及断裂韧度变化等方面探讨断裂机理及评价方法;从疲劳失效机理、疲劳强度评价及寿命评估等方面讨论轻金属焊接接头及构件寿命分析的方法;最后,对轻金属焊接中组织、性能及寿命变化特征研究方面存在的问题和可能的研究途径进行讨论。 展开更多
关键词 轻金属 焊接 不均匀性
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粘土胶SMD的注入特性与地层渗透率的关系 被引量:7
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作者 王业飞 汪庐山 +2 位作者 李继勇 纪树杰 邵红云 《油田化学》 CAS CSCD 北大核心 2001年第2期144-147,共4页
通过测定不同渗透率均质填砂模型注入粘土胶SMD的压力随注入量的变化 ,将SMD在地层的注入特性概括为 3种情形 ,随渗透率增加 ,SMD的作用逐步由渗滤面调剖向深部调剖再向驱油转化。基于该结果 ,用地层的不均质性导致SMD沿高渗透层突进解... 通过测定不同渗透率均质填砂模型注入粘土胶SMD的压力随注入量的变化 ,将SMD在地层的注入特性概括为 3种情形 ,随渗透率增加 ,SMD的作用逐步由渗滤面调剖向深部调剖再向驱油转化。基于该结果 ,用地层的不均质性导致SMD沿高渗透层突进解释了现场试验中的驱油效果及油井出胶现象。在填砂模型实验中使用添加高锰酸钾的紫色水溶液和添加碳粉的SMD ,证实了如下情况 :SMD对高渗透层的封堵强度弱 ,对中低渗透层产生堵塞 ,窜胶以后地层内形成SMD窜流层 ,导致注入水和SMD的波及系数降低 ,二次窜胶时间缩短。 展开更多
关键词 粘土胶 驱油剂 注入特性 渗流特性 岩心驱替 非均质油藏 胜坨七断块
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调剖剂在非均质多孔介质中的分流和封堵特性 被引量:4
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作者 肖磊 马宝岐 谌凡更 《油田化学》 CAS CSCD 北大核心 1995年第2期139-142,共4页
通过不同渗透率的多管平行岩心分流试验研究了调剖剂在非均质体系中的流动及封堵特性,由研究结果得出结论:注入压力是现场调剖成功的一个关键因素;宜选择渗透率级差大的注水井进行调剖。
关键词 调剖剂 非均质地层 注水井 调剖 油田注水 封堵
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非齐次特征值的盖尔圆盘放大与缩小的方法 被引量:1
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作者 尹海丽 李志敏 《青岛理工大学学报》 CAS 2006年第6期135-138,共4页
物理、力学和工程技术中的很多问题在数学上都归结为求矩阵的特征值问题,但非齐次特征值问题在实际中也有着广泛的应用,讨论了如何将非齐次特征值问题转化为齐次特征值问题,进而探讨了利用盖尔圆盘的放大缩小方法实现对非齐次特征值的估计.
关键词 非齐次特征值 盖尔圆 齐次特征值
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非齐次-方程典则解的延拓性质
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作者 马忠泰 吕永敬 《山东师范大学学报(自然科学版)》 CAS 2003年第1期1-3,共3页
利用最近关于解的延拓的某些研究 ,讨论了非齐次Cauchy -Riemann方程的典则解的特征和Cn中Hartogs延拓现象 ,得到了Cauchy -Riemann方程的典则解的一些新的延拓结果 .
关键词 非齐次Canchy-Riemann方程 典则解 非齐次δ—方程 Hartogs延拓现象 恒等定理
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非齐次-方程典则解的正则性
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作者 马忠泰 《山东师范大学学报(自然科学版)》 CAS 2000年第3期241-244,共4页
利用构造论方法和Rung理论 ,不仅给出了单复变量空间C中非齐次 -方程的典则解对参数的依赖性 ,而且给出了多复变量空间Cn 中非齐次 -方程的典则解的正则性的归纳法证明 .
关键词 非齐次э^--方程 典则解 参数依赖性 正则性
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求解非齐次特征值问题的迭代算法 被引量:3
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作者 李海宁 李志敏 王斌 《青岛建筑工程学院学报》 2005年第2期94-98,共5页
给出了非齐次特征值问题的几个有效的迭代算法,这些数值方法在计算机中容易实现.
关键词 非齐次特征值 非齐次特征向量 迭代法
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APPLICATION OF SIMILARITY PRINCIPLE TO STRATIFICATION THEORY STUDY IN GRAVITY CONCENTRATION 被引量:1
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作者 WEI Dezhou SUN Yubo Northeast University of Technology,Shenyang,China WEI Dezhou,Lecturer,Dept.of Mineral Engineering,Northeast University of Technology,Shenyang 110006,China 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 1990年第8期91-99,共9页
The stratification processes have been studied by the application of the similarity principle, and the similarity criteria has also been derived.Two possible π-equations were deduced from the experimental results.The... The stratification processes have been studied by the application of the similarity principle, and the similarity criteria has also been derived.Two possible π-equations were deduced from the experimental results.The approach of the π-equation to predict separating results and to control the separating processes is presented with examples. 展开更多
关键词 similarity principle π-equation gravity concentration gravitative stratification
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HOMOTOPY FORMULA FOR A LOCAL q-CONCAVE WEDGE IN STEIN MANIFOLDS AND IT'S APPLICATIONS 被引量:1
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作者 钟同德 《Acta Mathematica Scientia》 SCIE CSCD 1998年第4期435-439,共5页
A homotopy formula for a loced q-concave wedge in Stein manifolds is obtained, by using this formula the -equation on local q-concave wedges is solved, and an extension problem on local q-concave wedges is discussed.
关键词 stein manifold Local q-concave wedge Homotopy formula -equation Holomorphic extension.
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The Integral Representations and Their Applications on the Analytic Varieties of Bounded Domains in Stein Manifolds
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作者 CHEN Shu-jin 《Chinese Quarterly Journal of Mathematics》 2021年第4期331-355,共25页
In this paper,we first obtain a unified integral representation on the analytic varieties of the general bounded domain in Stein manifolds(the two types bounded domains in[3]are regarded as its special cases).Secondly... In this paper,we first obtain a unified integral representation on the analytic varieties of the general bounded domain in Stein manifolds(the two types bounded domains in[3]are regarded as its special cases).Secondly we get the integral formulas of the solution of∂-equation.And we use a new and unique method to give a uniform estimate of the solution of∂-equation,which is different from Henkin's method. 展开更多
关键词 -equation Uniform estimation General bounded domain Stein manifold Analytic varieties Integral representation
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The Solitary Wave Solutions of Important Model in Particle Physics and Engineering According to Two Different Techniques
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作者 Maha S. M. Shehata Emad H. M. Zahran 《American Journal of Computational Mathematics》 2019年第4期317-327,共11页
In this paper, we utilized the Jaulent-Miodek equation which is one of important models in particle physics and engineering. The exact traveling wave solutions for this equation “involving parameters” according to t... In this paper, we utilized the Jaulent-Miodek equation which is one of important models in particle physics and engineering. The exact traveling wave solutions for this equation “involving parameters” according to two different techniques are constructed. When these parameters are taken as special values, the solitary wave solutions are derived from it. A comparison between the obtained results using these two different methods with that obtained by previous authors is demonstrated. 展开更多
关键词 The Extended JACOBIAN ELLIPTIC Function Expansion METHOD The Ricatti-Bernolli Sub ODE METHOD The Jaulent-Miodek (JM)-equation TRAVELING Wave Solutions
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THE EXPLICIT SOLUTIONS OF C_(p,q)^(k+α)-FORM FOR THE -EQUATIONS ON PSEUDOCONVEX OPEN SETS 被引量:3
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作者 马忠泰 《Acta Mathematicae Applicatae Sinica》 SCIE CSCD 1997年第2期130-135,共6页
In this paper, we study the integral solution operators for the -equations on pseudoconvex domains. As a generalization of [1] for the -dequations on pseudoconvex domains with boundary of class C∞, we obtain the ex... In this paper, we study the integral solution operators for the -equations on pseudoconvex domains. As a generalization of [1] for the -dequations on pseudoconvex domains with boundary of class C∞, we obtain the explicit integral operator solutions of C -form for the -equations on pseudoconvex open sets with boundary of Ck (k≥0) and the sup-norm estimates of which solutions have similar as that [1] in form. 展开更多
关键词 Holomorphic vector bundle pseudoconvex open set with C^k boundary -equations space C_(p q)^(k+α)(D)
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Homotopy formulas and ■-equation on local q-convex domains in Stein manifolds
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作者 钟同德 《Science China Mathematics》 SCIE 1997年第8期817-824,共8页
The homotopy formulas of (r,s) differential forms and the solution of equation of type (r,s) on local q-convex domains in Stein manifolds are obtained.The homotopy formulas on local q-convex domains have important app... The homotopy formulas of (r,s) differential forms and the solution of equation of type (r,s) on local q-convex domains in Stein manifolds are obtained.The homotopy formulas on local q-convex domains have important applications in uniform estimates of equation and holomorphic extension of CR-manifolds. 展开更多
关键词 Stein manifold Koppelman-Leray-Norguet formula local q-convex domain homotopy formula -equation
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█_(b)-Equation on Stein Manifolds
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作者 钟同德 《Chinese Science Bulletin》 SCIE 1993年第17期1419-1423,共5页
G. M. Khenkin obtained the solution of (p, q)-form ■_b-equation of strictly pseudoconvex complex manifolds. In this note, we study the solution of (p, q)
关键词 Stein manifolds strictly pseudoconvex domain █_(b)-equation
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The Koppelman-Leray formula on complex Finsler manifolds 被引量:3
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作者 QIU Chunhui & ZHONG Tongde School of Mathematical Sciences, Xiamen University, Xiamen 361005, China Academy of Mathematics and System Sciences, Chinese Academy of Sciences, Beijing 100080, China 《Science China Mathematics》 SCIE 2005年第6期847-863,共17页
By means of the invariant integral kernel (the Berndtsson kernel), the complex Finsler metric and the non-linear connection associated with the Chern-Finsler connection to research into the integral representation the... By means of the invariant integral kernel (the Berndtsson kernel), the complex Finsler metric and the non-linear connection associated with the Chern-Finsler connection to research into the integral representation theory on complex Finsler manifolds, theKoppelman and Koppelman-Leray formulas are obtained, and the - -equations are solved. 展开更多
关键词 COMPLEX FINSLER manifold Chern-Finsler connection INVARIANT integral kernel Koppelman-Lerayformulas - -equation.
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Hankel operators on exponential Bergman spaces 被引量:2
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作者 Zhangjian Hu Jordi Pau 《Science China Mathematics》 SCIE CSCD 2022年第2期421-442,共22页
We completely describe the boundedness and compactness of Hankel operators with general symbols acting on Bergman spaces with exponential type weights.
关键词 weighted Bergman space Hankel operator ?-equation
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Integral formulas and the Ohsawa-Takegoshi extension theorem 被引量:1
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作者 Bo Berndtsson 《Science China Mathematics》 SCIE 2005年第z1期61-73,共13页
We construct a semiexplicit integral representation of the canonical solution to the (-δ)-equation with respect to a plurisubharmonic weight function in a pseudoconvex domain. The construction is based on a construct... We construct a semiexplicit integral representation of the canonical solution to the (-δ)-equation with respect to a plurisubharmonic weight function in a pseudoconvex domain. The construction is based on a construction related to the Ohsawa-Takegoshi extension theorem combined with a method to construct weighted integral representations due to M. Andersson. 展开更多
关键词 -equation integral representation
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