级数展开
级数展开的相关文献在1983年到2022年内共计133篇,主要集中在数学、力学、物理学
等领域,其中期刊论文82篇、会议论文4篇、专利文献9568篇;相关期刊74种,包括绍兴文理学院学报、徐州工程学院学报(社会科学版)、企业技术开发(下半月)等;
相关会议4种,包括中国声学学会第十一届青年学术会议、第八届全国信号与信息处理联合学术会议、全国第十二次“边值问题、积分方程以及相关问题”会议等;级数展开的相关文献由285位作者贡献,包括丁大志、樊振宏、陈如山等。
级数展开
-研究学者
- 丁大志
- 樊振宏
- 陈如山
- 李正权
- 沈连丰
- 王兵
- 常莉红
- 李瑾
- A·郭
- B·崔帕西
- V·T·阿诺德
- 于法传
- 于燕燕
- 亢战
- 任黎
- 何姿
- 刘世清
- 刘东亮
- 刘建坤
- 刘振宇
- 刘易斯
- 刘晓晶
- 刘洋
- 刘湃
- 刘苗苗
- 卢洁
- 卫鹏
- 吴琼
- 吴须大
- 周前
- 周正模
- 和鹏飞
- 喻增威
- 夏海军
- 夏玮玮
- 姚青松
- 姜晖
- 孙垚垚
- 孙梦显
- 宋铁成
- 尹睿
- 山尾泰
- 巩敦卫
- 康信文
- 张勇
- 张彤
- 张扬
- 张晓阳
- 张秋虎
- 彭嫦姿
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王可心;
严兴杰;
尹坤
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摘要:
介绍了3种求解带有Caputo型导数的时间-空间分数阶扩散方程的方法.通过分离变量和级数展开求数值解,将Fourier变换和Laplace变换用于求解析解,并把时间和空间定义域上的分数阶导数分别限制在0<γ≤1,0<β≤2.%In this article,we suggest three methods to address the time-space fractional diffusion equations within Caputo fractional derivative,the separation of variables and the series expansion method for numerical solution,Fourier transform and Laplace transform for analytical solution.The orders of derivative are restricted by 0 < γ ≤ 1,1 < β≤ 2 for the time and space domains,respectively.
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肖翼忻1;
霍学深1;
申文斌12
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摘要:
全球范围地表浅层质量分布的重力正演,在计算评估布格异常、地壳均衡补偿、超高精度地球重力场构建及地球内部结构反演时具有重要意义。本文在考虑质量分布的三维各向异性的重力正演方法的基础上,考察GEMMA地壳结构模型下各个大地构造分区的重力正演各阶结果对总体重力正演结果的贡献率。以仅考虑重力正演算法的误差因素的影响量级为0.1 mGal精度为判断准则,通过考察在空域下各个大地构造分区按照级数展开阶数的结果与总体重力正演的结果的差值,结果表明,其中地壳厚度较浅的大地构造分区(洋壳、大洋中脊)所需截断阶次为6阶,而地壳厚度较厚的大地构造分区(造山带、盆地、火成岩省、地盾、地台)所需截断阶次为12阶。
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肖军;
李小珍;
刘德军;
刘晨光;
肖林
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摘要:
An analytical solution method was proposed to solve the problem of shear lag.A new shear lag warping function for the shear distribution of different cosine was constructed based on the solution of the governing equations.The trigonometric series were used to expand the shear distribution function under any given external loads,and the normal stress corresponding to each shear component was obtained separately.Finally,the superposition of normal stress was obtained and the distributions of shear lag were calculated.The energy variation method was used to derive the solution formulas based on the arbitrary warping displacement functions of shear lag effect,and a general solution procedure was developed.A rectangular simply supported box beam without cantilever plate under concentrated load and a box beam with cantilever plate under distributed load were analyzed.The calculation results show that the solution method proposed in this study could adapt well with different types of loads compared with the existing methods,and it could be effectively used for shear lag analysis of box beams subjected to arbitrary loads.%针对剪力滞问题,提出了一种解析的求解方法.通过对控制微分方程解的形式进行研究,构造出一种针对不同余弦剪力分布的剪滞翘曲函数;进而对任意给定的外荷载作用下的剪力分布进行级数展开,并单独求取各剪力分量对应的正应力;最终通过对正应力进行叠加并求取剪力滞分布.采用能量变分法推导了基于任意剪滞翘曲位移函数的求解公式,并编制了通用求解程序.分别以矩形简支箱梁(不带悬臂板)受集中荷载和带悬臂箱梁受均布荷载为例,进行了计算对比.研究表明:相比于已有方法,所提出的方法对不同荷载作用形式具有更好的适应性,且由于是采用级数展开的思想,适用于任意荷载作用情况下的剪力滞分析.
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裘松良;
王晓宇;
李晴晴
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摘要:
In this paper, the authors present several kinds of series expansions of the Ramanuj an constant R(a)=-2γ-ψ(a)-ψ(1-a),and monotonicity and convexity properties of certain combinations defined in terms of R(a)and polynomials,according to different application needs.By these results,several asymptotically sharp upper and lower bounds are obtained for R(a),and some known related results can be easily improved.In addition,several identities satisfied by the Riemann zeta function are provided.%根据不同的应用需求,给出了 Ramanuj an常数R(a)=-2γ-ψ(a)-ψ(1-a)的几类级数展开式、R(a)与多项式的一些组合的单调性和凹凸性,并利用这些结果获得了R(a)的渐近精确的上下界。运用这些级数展开式,关于R(a)的一些已知结果很容易得到改进。此外还给出了 Riemann zeta函数满足的几个恒等式。
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过家春;
申文斌;
边少锋;
纪兵
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摘要:
Formulas for the approximate calculation of the triaxial ellipsoid surface area (including the special cases of the oblate or rotational ellipsoids) were derived by series expansion.These formulas are symmetric and have more concise structures by introducing the eccentricity and the third flatting.In this way,the theory for calculating the surface area of all kinds of ellipsoids is improved.Analysis and numerical verification show that the new formulas provided in this study can significantly improve precision and are potential in various applications.%推导出了一组三轴椭球表面积近似计算的级数展开公式,并对应地给出了三轴椭球退化为扁椭球和旋转椭球时的表面积公式.该组公式通过引入偏心率、第三扁率等扁率,使公式结构上更为简洁,具有对称性,进一步完善了椭球表面积的计算理论.验算分析表明,相比于传统的近似公式,给出的近似计算公式的精度显著提高,具有实用价值.
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过家春;
李厚朴;
庄云玲;
李大军;
吴艳兰
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摘要:
推导了以归化纬度、地心纬度解算子午线弧长的展开公式,同时又根据拉格朗日反演定理,得到了由子午线弧长反解归化纬度、地心纬度的直接公式.该组公式与子午线弧长正反解公式的大地纬度表达在结构形式上保持一致,进一步揭示了子午线弧长同3种纬度变量之间的内在联系.分析表明,基于归化纬度的子午线弧长解算与大地主题解算方法具有理论上的统一性,正反解精度均高于传统基于大地纬度的展开.%Formulas for direct solutions of meridian written by the reduced and geocentric latitudes respectively were derived by series expansion.Meanwhile,according to Lagrange inversion theorem, formulas for inverse solutions of the issue were also expressed in terms of the same latitudes.These two formulas were structurally consistent with that expressed by geodetic latitude ones.In these sets of formulas,internal connection between meridian and three different types of latitude were realized.Analysis and numerical calculation showed that the direct and inverse meridional solution with reduced latitude was of higher precision than that with geodetic latitude,and furthermore,there had a unified theory between meridian theory and classical geodetic problems expressed by reduced latitude.
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常莉红;
李星
- 《全国第十二次“边值问题、积分方程以及相关问题”会议》
| 2005年
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摘要:
研究了无限大压电复合材料中双周期圆柱形夹杂的反平面问题.利用双周期Riemann边值问题的解析函数理论和级数展开的分析方法,借助Eshelby夹杂原理研究了压电复合材料中双周期圆柱形夹杂的反平面问题,获得了夹杂和基体内电弹性场的复式表达式,并利用数值算例分析了双周期夹杂对应力和电位移的影响。
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