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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

Frontiers of Chemical Science and Engineering 2009, Volume 3, Issue 1,   Pages 12-19 doi: 10.1007/s11705-009-0151-3

Abstract: CO , on the other hand, especially in its supercritical state, is a green solvent that can be used advantageouslypressure CO - ionic liquid solubility data and report new correlations for CO -ionic liquid systems with equationsof state that have some industrial applications including: (1) general, (2) fuel desulfurization, (3In the correlation of the CO ionic liquid phase behavior, the Peng-Robinson and the Sanchez-Lacombe equationsof state were considered and are compared.

Keywords： compact processes     chiral ionic liquids     separations     thermodynamic properties     equations of state    

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A review on membrane distillation in process engineering: design and exergy equations, materials and

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 5,   Pages 592-613 doi: 10.1007/s11705-021-2105-3

Abstract: One of the problems that most afflicts humanity is the lack of clean water. Water stress, which is the pressure on the quantity and quality of water resources, exists in many places throughout the World. Desalination represents a valid solution to the scarcity of fresh water and several technologies are already well applied and successful (such as reverse osmosis), producing about 100 million m3·d−1 of fresh water. Further advances in the field of desalination can be provided by innovative processes such as membrane distillation. The latter is of particular interest for the treatment of waste currents from conventional desalination processes (for example the retentate of reverse osmosis) as it allows to desalt highly concentrated currents as it is not limited by concentration polarization phenomena. New perspectives have enhanced research activities and allowed a deeper understanding of mass and heat transport phenomena, membrane wetting, polarization phenomena and have encouraged the use of materials particularly suitable for membrane distillation applications. This work summarizes recent developments in the field of membrane distillation, studies for module length optimization, commercial membrane modules developed, recent patents and advancement of membrane material.

Keywords： membrane distillation     recent developments     heat and mass transfer     wetting     membrane material    

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Parametric equations for notch stress concentration factors of rib–deck welds under bending loading

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 3,   Pages 595-608 doi: 10.1007/s11709-021-0720-1

Abstract: The effective notch stress approach for evaluating the fatigue strength of rib–deck welds requires notch stress concentration factors obtained from complex finite element analysis. To improve the efficiency of the approach, the notch stress concentration factors for three typical fatigue-cracking modes (i.e., root–toe, root–deck, and toe–deck cracking modes) were thoroughly investigated in this study. First, we developed a model for investigating the effective notch stress in rib–deck welds. Then, we performed a parametric analysis to investigate the effects of multiple geometric parameters of a rib–deck weld on the notch stress concentration factors. On this basis, the multiple linear stepwise regression analysis was performed to obtain the optimal regression functions for predicting the notch stress concentration factors. Finally, we employed the proposed formulas in a case study. The notch stress concentration factors estimated from the developed formulas show agree well with the finite element analysis results. The results of the case study demonstrate the feasibility and reliability of the proposed formulas. It also shows that the fatigue design curve of FAT225 seems to be conservative for evaluating the fatigue strength of rib–deck welds.

Keywords： notch stress concentration factor     rib–deck weld     parametric analysis     regression analysis     parametric equation    

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Solving nonlinear differential equations of Vanderpol, Rayleigh and Duffing by AGM

M. R. AKBARI,D. D. GANJI,A. MAJIDIAN,A. R. AHMADI

Frontiers of Mechanical Engineering 2014, Volume 9, Issue 2,   Pages 177-190 doi: 10.1007/s11465-014-0288-8

Abstract:

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 AlgebraicInvestigating this kind of equations is a very hard task to do and the obtained solution is not accuratenumerical method, it is possible to indicate that AGM can be successfully applied for various differential equations

Keywords： Algebraic Method (AGM)     Angular Frequency     Vanderpol     Rayleigh     Duffing    

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Some Scientific Problems in Proca's Theory Study

Huang Zhixun

Strategic Study of CAE 2005, Volume 7, Issue 3,   Pages 6-12

Abstract: In other-wise, for a massive photon the Maxwell equations get replaced by the Proca equations.

The main, linear extensions of Maxwell equations are the Proca equations (1936) and the Ohmaraequations (1956).

Keywords： special relativity     Maxwell equations     Proca equations     velocity of EM-waves     rest mass of photon    

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Research on Propagation Characteristic in Close-in Field of Shock Wave of TNT Charge Explosion

Zhou Fengjun,Zheng Lei,Sun Yunhou,Zhang Ao and Xia Ming

Strategic Study of CAE 2017, Volume 19, Issue 6,   Pages 18-26 doi: 10.15302/J-SSCAE-2017.06.004

Abstract: of a shock wave of the TNT spherical charge explosion in real air condition by using the dimensional stateequations of real air and the detonation products of a TNT spherical charge.

Keywords： charge blasting of TNT     state equations of real air     plate source charge     line source charge     point source    

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Development of component stiffness equations for thread-fixed one-side bolt connections to an enclosed

Frontiers of Structural and Civil Engineering 2024, Volume 18, Issue 4,   Pages 568-586 doi: 10.1007/s11709-024-1064-4

Abstract: The derivation and validation of analytical equations for predicting the tensile initial stiffness ofFinally, the validity of the above stiffness equations is verified by a series of finite element (FE)The proposed component stiffness equations are an effective supplement to the component-based method.

Keywords： initial stiffness     component based method     thread-fixed one-side bolt     rectangular hollow sections     analytical equation    

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Gas pressure-sensitive regulation of exciton state of monolayer tungsten disulfide

Frontiers of Chemical Science and Engineering doi: 10.1007/s11705-024-2483-4

Abstract: Over the past few decades, significant progress has been made in thin-film optoelectronic devices based on transition metal dichalcogenides. However, the exciton states’ sensitivity to the environment presents challenges for device applications. This study reports the evolution of photoinduced exciton states in monolayer tungsten disulfide in a low-pressure environment to help elucidate the physical mechanism of the transition between neutral and charged excitons. At 222 mTorr, the transition rate between excitons comprises two components: 0.09 s–1 and 1.68 s–1. Based on this phenomenon, we developed a pressure-tuning method that allows for a tuning range of approximately 40% of exciton weight. Our study demonstrates that the intensity of neutral exciton emission from monolayer tungsten disulfide follows a power-law distribution in relation to pressure, indicating a highly sensitive pressure dependence. We provide a nondestructive and highly sensitive method for exciton conversion through in situ optical manipulation. This highlights the potential development of monolayer tungsten disulfide for pressure sensors and explains the impact of environmental factors on the product quality in photovoltaic devices. In addition, it demonstrates the promising future of monolayer transition metal dichalcogenides in applications such as photovoltaic devices and miniature biochemical sensors.

Keywords： neutral exciton state     charged exciton state     transition metal dichalcogenides     pressure sensitive    

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Advances in tissue state recognition in spinal surgery: a review

Hao Qu, Yu Zhao

Frontiers of Medicine 2021, Volume 15, Issue 4,   Pages 575-584 doi: 10.1007/s11684-020-0816-3

Abstract: In the past, tactile sensation was the primary method used by surgeons to understand the state of theTherefore, it has become the focus of spinal surgery research so as to strengthen the objectivity of tissue stateThis article reviews the progress of different tissue state recognition methods in spinal surgery and

Keywords： spinal surgery     tissue state recognition     image     force sensing     bioelectrical impedance    

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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

Frontiers of Mechanical Engineering 2014, Volume 9, Issue 4,   Pages 390-401 doi: 10.1007/s11465-014-0313-y

Abstract: p>In this paper, we aim to promote the capability of solving two complicated nonlinear differential equationssignificant that there are some valuable advantages in this method and also most of the differential equationsBrief excellences of this method compared to other approaches are as follows: 1) Differential equations

Keywords： AGM     extended surface     heat transfer     slope-deflection method    

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Digital image correlation-based structural state detection through deep learning

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 1,   Pages 45-56 doi: 10.1007/s11709-021-0777-x

Abstract: This paper presents a new approach for automatical classification of structural state through deep learningand classification blocks into an intelligent and compact learning system and detect the structural stateof a steel frame; the input was a series of vibration signals, and the output was a structural stateIt is demonstrated that: 1) the CNN can extract the structural state information from the vibration signals

Keywords： structural state detection     deep learning     digital image correlation     vibration signal     steel frame    

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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

Frontiers of Mechanical Engineering 2014, Volume 9, Issue 4,   Pages 402-408 doi: 10.1007/s11465-014-0316-8

Abstract: Using alternative constitutive equations can allow for viscoelastic or plastic beam deformation.In this paper nonlinear differential equations governing on this system are solved analytically by Akbari-GanjiMoreover, in AGM by solving a set of algebraic equations, complicated nonlinear equations can easily

Keywords： AGM     critical load of columns     large deformations of beam     nonlinear differential equation    

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Solution of Integral Equations and Experimental Analysis of Fire Smoke Plumes in Stably Linearly Thermally

Fang Jun,Shu Xueming,Yuan Hongyong,Zheng Xin

Strategic Study of CAE 2004, Volume 6, Issue 1,   Pages 37-43

Abstract:

Through numerical solution of the dimensionless integral equations of the turbulent buoyant plume

Keywords： stably linearly thermally stratified environment     fire smoke plume     solution of integral equations     experimental    

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Effectiveness of state incentives for promoting wind energy: A panel data examination

Deepak SANGROYA,Jogendra NAYAK

Frontiers in Energy 2015, Volume 9, Issue 3,   Pages 247-258 doi: 10.1007/s11708-015-0364-8

Abstract: The Indian government, as well as different state governments, are adopting policy instruments such asThis paper evaluates the effectiveness of state level incentives for the development of wind energy in

Keywords： India     wind energy development     state incentives     econometric analysis     panel data    

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Multi-state system reliability: An emerging paradigm for sophisticated engineered systems

Frontiers of Engineering Management doi: 10.1007/s42524-024-0140-8

Abstract: Multi-state system reliability: An emerging paradigm for sophisticated engineered systems

Keywords： paradigm systems    

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Title Author Date Type Operation

Measurement and correlation of supercritical CO

Hiroshi MACHIDA, Ryosuke TAGUCHI, Yoshiyuki SATO, Louw J. FLOURUSSE, Cor J. PETERS, Richard L. SMITH

Journal Article

A review on membrane distillation in process engineering: design and exergy equations, materials and

Journal Article

Parametric equations for notch stress concentration factors of rib–deck welds under bending loading

Journal Article

Solving nonlinear differential equations of Vanderpol, Rayleigh and Duffing by AGM

M. R. AKBARI,D. D. GANJI,A. MAJIDIAN,A. R. AHMADI

Journal Article

Some Scientific Problems in Proca's Theory Study

Huang Zhixun

Journal Article

Research on Propagation Characteristic in Close-in Field of Shock Wave of TNT Charge Explosion

Zhou Fengjun,Zheng Lei,Sun Yunhou,Zhang Ao and Xia Ming

Journal Article

Development of component stiffness equations for thread-fixed one-side bolt connections to an enclosed

Journal Article

Gas pressure-sensitive regulation of exciton state of monolayer tungsten disulfide

Journal Article

Advances in tissue state recognition in spinal surgery: a review

Hao Qu, Yu Zhao

Journal Article

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

Journal Article

Digital image correlation-based structural state detection through deep learning

Journal Article

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

Journal Article

Solution of Integral Equations and Experimental Analysis of Fire Smoke Plumes in Stably Linearly Thermally

Fang Jun,Shu Xueming,Yuan Hongyong,Zheng Xin

Journal Article

Effectiveness of state incentives for promoting wind energy: A panel data examination

Deepak SANGROYA,Jogendra NAYAK

Journal Article

Multi-state system reliability: An emerging paradigm for sophisticated engineered systems

Journal Article