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Measurement and correlation of supercritical CO
Hiroshi MACHIDA, Ryosuke TAGUCHI, Yoshiyuki SATO, Louw J. FLOURUSSE, Cor J. PETERS, Richard L. SMITH
《化学科学与工程前沿(英文)》 2009年 第3卷 第1期 页码 12-19 doi: 10.1007/s11705-009-0151-3
关键词: compact processes chiral ionic liquids separations thermodynamic properties equations of state
A review on membrane distillation in process engineering: design and exergy equations, materials and
《化学科学与工程前沿(英文)》 2022年 第16卷 第5期 页码 592-613 doi: 10.1007/s11705-021-2105-3
关键词: membrane distillation recent developments heat and mass transfer wetting membrane material
Parametric equations for notch stress concentration factors of rib–deck welds under bending loading
《结构与土木工程前沿(英文)》 2021年 第15卷 第3期 页码 595-608 doi: 10.1007/s11709-021-0720-1
关键词: notch stress concentration factor rib–deck weld parametric analysis regression analysis parametric equation
Solving nonlinear differential equations of Vanderpol, Rayleigh and Duffing by AGM
null
《机械工程前沿(英文)》 2014年 第9卷 第2期 页码 177-190 doi: 10.1007/s11465-014-0288-8
In the present paper, three complicated nonlinear differential equations in the field of vibration, which are Vanderpol, Rayleigh and Duffing equations, have been analyzed and solved completely by Algebraic Method (AGM). Investigating this kind of equations is a very hard task to do and the obtained solution is not accurate and reliable. This issue will be emerged after comparing the achieved solutions by numerical method (Runge-Kutte 4th). Based on the comparisons which have been made between the gained solutions by AGM and numerical method, it is possible to indicate that AGM can be successfully applied for various differential equations particularly for difficult ones. The results reveal that this method is not only very effective and simple, but also reliable, and can be applied for other complicated nonlinear problems.
关键词: Algebraic Method (AGM) Angular Frequency Vanderpol Rayleigh Duffing
黄志洵
《中国工程科学》 2005年 第7卷 第3期 页码 6-12
2004年6月,位于西非Oklo的美国Los Alamos实验室的核工业反应堆对实验数据做再分析后得出结论说,近20亿年内精细结构常数减小了4.5×10-8。常数不常,意味着光速有很小的变化。这是最新的与狭义相对论不符的实验报告。另一方面,光子如有质量,Maxwell方程组将被Proca方程组所取代,而磁矢位(势)A将成为可观测量。而过去和现在都有许多方法测量光子的质量。
文章的主要目的是在Proca理论框架内研究电磁波波速,发现即使在自由空间(真空)条件下也会出现超光速传播;同时又对波导与Proca波的截止现象做了比较,给出了相应的结果。
关键词: 狭义相对论 Maxwell方程组 Proca方程组 电磁波波速 光子的静止质量
周丰峻,郑磊,孙云厚,张鏖,夏明
《中国工程科学》 2017年 第19卷 第6期 页码 18-26 doi: 10.15302/J-SSCAE-2017.06.004
本文基于点源爆炸理论,建立了面源、线源和点源TNT装药强爆炸解,填补了面源与线源强爆炸解的空白;采用真实空气状态方程进行分析计算,研究了真实空气条件下球形TNT装药爆炸近区冲击波的传播特性。通过算例分析,计算结果与已有文献资料数据吻合较好。本文的研究成果对爆炸力学和防护工程研究起到了重要的参考作用。
M. R. AKBARI,D. D. GANJI,M. NIMAFAR,A. R. AHMADI
《机械工程前沿(英文)》 2014年 第9卷 第4期 页码 390-401 doi: 10.1007/s11465-014-0313-y
In this paper, we aim to promote the capability of solving two complicated nonlinear differential equations: 1) Static analysis of the structure with variable cross section areas and materials with slope-deflection method; 2) the problem of one dimensional heat transfer with a logarithmic various surface A(x) and a logarithmic various heat generation G(x) with a simple and innovative approach entitled “Akbari-Ganji’s method” (AGM). Comparisons are made between AGM and numerical method, the results of which reveal that this method is very effective and simple and can be applied for other nonlinear problems. It is significant that there are some valuable advantages in this method and also most of the differential equations sets can be answered in this manner while in other methods there is no guarantee to obtain the good results up to now. Brief excellences of this method compared to other approaches are as follows: 1) Differential equations can be solved directly by this method; 2) without any dimensionless procedure, equation(s) can be solved; 3) it is not necessary to convert variables into new ones. According to the aforementioned assertions which are proved in this case study, the process of solving nonlinear equation(s) is very easy and convenient in comparison to other methods.
关键词: AGM extended surface heat transfer slope-deflection method
Advances in tissue state recognition in spinal surgery: a review
Hao Qu, Yu Zhao
《医学前沿(英文)》 2021年 第15卷 第4期 页码 575-584 doi: 10.1007/s11684-020-0816-3
关键词: spinal surgery tissue state recognition image force sensing bioelectrical impedance
Effectiveness of state incentives for promoting wind energy: A panel data examination
Deepak SANGROYA,Jogendra NAYAK
《能源前沿(英文)》 2015年 第9卷 第3期 页码 247-258 doi: 10.1007/s11708-015-0364-8
关键词: India wind energy development state incentives econometric analysis panel data
M. R. AKBARI,M. NIMAFAR,D. D. GANJI,M. M. AKBARZADE
《机械工程前沿(英文)》 2014年 第9卷 第4期 页码 402-408 doi: 10.1007/s11465-014-0316-8
The kinematic assumptions upon which the Euler-Bernoulli beam theory is founded allow it to be extended to more advanced analysis. Simple superposition allows for three-dimensional transverse loading. Using alternative constitutive equations can allow for viscoelastic or plastic beam deformation. Euler-Bernoulli beam theory can also be extended to the analysis of curved beams, beam buckling, composite beams and geometrically nonlinear beam deflection. In this study, solving the nonlinear differential equation governing the calculation of the large rotation deviation of the beam (or column) has been discussed. Previously to calculate the rotational deviation of the beam, the assumption is made that the angular deviation of the beam is small. By considering the small slope in the linearization of the governing differential equation, the solving is easy. The result of this simplification in some cases will lead to an excessive error. In this paper nonlinear differential equations governing on this system are solved analytically by Akbari-Ganji’s method (AGM). Moreover, in AGM by solving a set of algebraic equations, complicated nonlinear equations can easily be solved and without any mathematical operations such as integration solving. The solution of the problem can be obtained very simply and easily. Furthermore, to enhance the accuracy of the results, the Taylor expansion is not needed in most cases via AGM manner. Also, comparisons are made between AGM and numerical method (Runge-Kutta 4th). The results reveal that this method is very effective and simple, and can be applied for other nonlinear problems.
关键词: AGM critical load of columns large deformations of beam nonlinear differential equation
方俊,疏学明,袁宏永,郑昕
《中国工程科学》 2004年 第6卷 第1期 页码 37-43
对稳定线性热分层环境下湍浮力羽流无量纲积分方程首次采用数值解法进行求解,得出浮力通量、动量通量等参量在轴线上的变化规律以及羽流中性浮力点的高度和羽流最大上升高度。2种不同尺度空间及不同烟气羽流出口条件的实验表明,实际火灾烟气羽流最大上升高度与理论计算结果及文献经验公式相符,从而表明积分模型数值解的有效性,并为高大空间火灾烟气输运规律研究及探测技术发展提供了理论及实验依据。
Digital image correlation-based structural state detection through deep learning
《结构与土木工程前沿(英文)》 2022年 第16卷 第1期 页码 45-56 doi: 10.1007/s11709-021-0777-x
关键词: structural state detection deep learning digital image correlation vibration signal steel frame
Biological pretreatment of corn stover by solid state fermentation of
Jian ZHANG, Xin REN, Wenqun CHEN, Jie BAO
《化学科学与工程前沿(英文)》 2012年 第6卷 第2期 页码 146-151 doi: 10.1007/s11705-012-1220-6
关键词:
biological pretreatment
数据驱动的随机微分方程辨识 Article
王亚森, 方华臻, 金骏阳, 马贵君, 何心, 代星, 岳作功, 程骋, 张海涛, 浦栋麟, 伍冬睿, 袁烨, Jorge Gonçalves, Jürgen Kurths, 丁汉
《工程(英文)》 2022年 第17卷 第10期 页码 244-252 doi: 10.1016/j.eng.2022.02.007
随机微分方程(SDE)是一种广泛用于描述受不同来源噪声干扰的复杂过程或现象的数学模型。由于数据固有的强随机性和系统动力学的复杂性,控制系统的SDE的辨识通常是一个挑战。辨识SDE的现有参数化方法的实用性通常受到数据资源不足的限制。本研究提出了一种通过稀疏贝叶斯学习(SBL)技术从候选基函数空间中搜索简洁但物理必需的表示形式来辨识SDE的新框架。更重要的是,利用SBL的解析可处理性开发了一种可以通过少量数据来高效地构建辨识SDE的线性回归模型的方法。本文利用股票和石油价格、轴承变化和风速的真实数据,以及包括广义维纳(Wiener)过程和朗之万方程在内的著名随机动力系统的仿真数据,验证了所提出框架的有效性。该框架旨在帮助专家从自然科学、经济学和工程领域的随机现象中提取随机数学模型,用于分析、预测和决策。
Mehdi VEISKARAMI, Ali GHORBANI, Mohammadreza ALAVIPOUR
《结构与土木工程前沿(英文)》 2012年 第6卷 第4期 页码 365-378 doi: 10.1007/s11709-012-0178-2
关键词: constitutive model granular material rockfill plasticity disturbed state concept stress level
标题 作者 时间 类型 操作
Measurement and correlation of supercritical CO
Hiroshi MACHIDA, Ryosuke TAGUCHI, Yoshiyuki SATO, Louw J. FLOURUSSE, Cor J. PETERS, Richard L. SMITH
期刊论文
A review on membrane distillation in process engineering: design and exergy equations, materials and
期刊论文
Parametric equations for notch stress concentration factors of rib–deck welds under bending loading
期刊论文
Significant progress in solution of nonlinear equations at displacement of structure and heat transfer
M. R. AKBARI,D. D. GANJI,M. NIMAFAR,A. R. AHMADI
期刊论文
Effectiveness of state incentives for promoting wind energy: A panel data examination
Deepak SANGROYA,Jogendra NAYAK
期刊论文
Scrutiny of non-linear differential equations Euler-Bernoulli beam with large rotational deviation by
M. R. AKBARI,M. NIMAFAR,D. D. GANJI,M. M. AKBARZADE
期刊论文
Biological pretreatment of corn stover by solid state fermentation of
Jian ZHANG, Xin REN, Wenqun CHEN, Jie BAO
期刊论文
数据驱动的随机微分方程辨识
王亚森, 方华臻, 金骏阳, 马贵君, 何心, 代星, 岳作功, 程骋, 张海涛, 浦栋麟, 伍冬睿, 袁烨, Jorge Gonçalves, Jürgen Kurths, 丁汉
期刊论文