Search results for: Zeng He

Items from 1 to 20 out of 32 results

article

PPC-based reactive hot melt polyurethane adhesive (RHMPA)—Efficient glues for multiple types of substrates

Zeng-He Liu, Ji-Qing Huang, Li-Jie Sun, Dong Lei, more

Chinese Journal of Polymer Science > 2018 > 36 > 1 > 58-64

Tens of billion metric tons of anthropogenic CO₂ discharged from the burning of fossil fuels lead to an enormous environmental and resource burden. It is charming to transform CO₂ to desirable, economical chemicals and materials. Poly(propylene carbonate) (PPC) is an emerging CO₂-based material. Herein, we report the design, synthesis and characterization of the reactive hot melt polyurethane adhesive...

article

Molecular simulation of interfacial reaction between TiAl alloy melts and different coatings

Yan-wei Sui, Cheng Cheng, Kun Feng, Ji-qiu Qi, more

China Foundry > 2017 > 14 > 3 > 205-210

The effect of coatings (Y₂O₃, ZrO₂ and Al₂O₃) on the interfacial reaction of TiAl alloys was studied with molecular dynamics. The binding energy of coatings and the diffusion process of oxygen in the melt were simulated, and then the simulation results were compared with the experimental results. The simulation results indicate that for each of the three simulated coatings, inordinate interfacial...

article

Interactions between gas flow and reversible chemical reaction in porous media

Yuan-yong Jiang, Zeng-he Xu, Meng-zhou Zhang, Li-yuan Bai

Journal of Central South University > 2017 > 24 > 5 > 1144-1154

Taking into consideration the gas compressibility and chemical reaction reversibility, a model was developed to study the interactions between gas flow and chemical reaction in porous media and resolved by the finite volume method on the basis of the gas-solid reaction aA(g) + bB(s) ⇄ cC(g) + dD(s). The numerical analysis shows that the equilibrium constant is an important factor influencing the process...

article

Identification of rock discontinuity sets based on a modified affinity propagation algorithm

Jie Liu, Xing-Dong Zhao, Zeng-he Xu

International Journal of Rock Mechanics and Mining Sciences > 2017 > 94 > C > 32-42

Identification of rock discontinuity sets is an important foundation for stability analysis of rock engineering applications. A modified affinity propagation (AP) algorithm is proposed for identifying rock discontinuity sets based on discontinuity orientations. The method considers all data points as potential clustering centers simultaneously, which could avoid the hard selection on initial clustering...

article

Optimal channels of the Garvey-Kelson mass relations in extrapolation

Man Bao, Zeng He, YiYuan Cheng, YuMin Zhao, more

Science China Physics, Mechanics & Astronomy > 2017 > 60 > 2 > 1-6

Garvey-Kelson mass relations connect nuclear masses of neighboring nuclei within high accuracy, and provide us with convenient tools in predicting unknown masses by extrapolations from existent experimental data. In this paper we investigate optimal “channels” of the Garvey-Kelson relations in extrapolation to the unknown regions, and tabulate our predicted masses by using these optimized channels...

article

Isogeometric analysis of the nonlinear deformation of planar flexible beams with snap-back

Zheng Huang, Zeng He, Wen Jiang, Hou Qiao, more

Acta Mechanica Solida Sinica > 2016 > 29 > 4 > 379-390

Based on the continuity of the derivatives of the Non-Uniform Rational B-Splines (NURBS) curve and the Jaumann strain measure, the present paper adopted the position coordinates of the control points as the degrees of freedom and developed a planar rotation-free Euler-Bernoulli beam element for isogeometric analysis, where the derivatives of the field variables with respect to the arc-length were...

article

Isogeometric Analysis of the Nonlinear Deformation of Planar Flexible Beams with Snap-back

Zheng Huang, Zeng He, Wen Jiang, Hou Qiao, more

Acta Mechanica Solida Sinica > 2016 > 29 > 4 > 379-390

article

Topology optimization of PCLD on plates for minimizing sound radiation at low frequency resonance

Weiguang Zheng, Tieliang Yang, Qibai Huang, Zeng He

Structural and Multidisciplinary Optimization > 2016 > 53 > 6 > 1231-1242

Topology optimization of passive constrained layer damping (PCLD) treatment patched on thin plates with respect to sound radiation at low frequency resonance is investigated. An extended solid isotropic material with penalization (SIMP) model is described using an interface finite element model for viscoelastic layer. Then the given FE mesh for base structure can remain the same during the optimization...

article

An integrated similarity metric for graph-based color image segmentation

Xiang Li, Lianghai Jin, Enmin Song, Zeng He

Multimedia Tools and Applications > 2016 > 75 > 6 > 2969-2987

Graph-based method has become one of the major trends in image segmentation. In this paper, we focus on how to build the affinity matrix which is one of the key issues in graph-based color image segmentation. Four different metrics are integrated in order to build an effective affinity matrix for segmentation. First, the quaternion-based color distance is utilized to measure color differences between...

chapter

A research on methods and applications of case study in public administration

Yuan-zeng He, Cheng Cheng, Qing-shan Xu, Li-hua Yang

2014 International Conference on Management Science & Engineering 21th Annual Conference Proceedings > 1977 - 1982

2014 International Conference on Management Science and Engineering (ICMSE)

Case study is a very common and important research method. It has been widely used in public administration. However, it tends to be questioned, misunderstood and misused in Chinese public administration. The scientific standard of case study method is far beyond establishment in China. In this paper, we try to explain what a case study is and how to use it scientifically, including the definition,...

chapter

Multi-generation product optimal pricing with strategic customer behavior

Zeng He-qi, Zhang Yu-lin

2014 11th International Conference on Service Systems and Service Management (ICSSSM) > 1 - 4

2014 11th International Conference on Service Systems and Service Management (ICSSSM)

This paper uses two generations products as an example to examine the pricing problem of multi-generation product when there're several kinds of customers in the market, and analyzes the effect of percentage of multi-generation product buyers and strategic customers on pricing new generation product and on discount price of old generation product. The study shows that the price of the new generation...

article

Neuro fuzzy model for predicting the dynamic characteristics of beams

Imad O. Bachi, Nabeel Abdulrazzaq, Zeng He

Acta Mechanica Solida Sinica > 2014 > 27 > 1 > 85-96

An adaptive neuro-fuzzy inference system (ANFIS) is introduced to predict the dynamic behavior of beams. The effects of axial forces and large displacements are considered in the analysis. A database of tests for the dynamic characteristics of beams is developed from the experimental tests. The responses of nonlinear vibration force for the single and multiple-stepped beams are calculated from the...

article

Neuro Fuzzy Model for Predicting the Dynamic Characteristics of Beams

Imad O. Bachi, Nabeel Abdulrazzaq, Zeng He

Acta Mechanica Solida Sinica > 2014 > 27 > 1 > 85-96

article

Polyamidoamine dendrimer conjugated chitosan nanoparticles for the delivery of methotrexate

Zhen-Hua Leng, Qian-Fen Zhuang, Yan-Chao Li, Zeng He, more

Carbohydrate Polymers > 2013 > 98 > 1 > 1173-1178

Encapsulating anticancer drugs to synthetic polymer is a promising approach to improve the efficiency and reduce the side effects of anticancer drugs. In this study, novel chitosan derivatives with polyamidoamine moieties (CS-PAMAM) were synthesized and characterized by morphology, particle size, and zeta potential. Then the anticancer drug–methotrexate-encapsulated CS-PAMAM was prepared by hydrophobic–hydrophilic...

article

In vitro investigation of the effect of plasticizers on the blood compatibility of medical grade plasticized poly (vinyl chloride)

Rui Zhong, Hong Wang, Xia Wu, Ye Cao, more

Journal of Materials Science: Materials in Medicine > 2013 > 24 > 8 > 1985-1992

This paper reports the results of an in vitro investigation into the blood response of medical grade poly (vinyl chloride) (PVC), and two types of plasticized PVC in tubing or sheet form, with di-(2-ethylhexyl)phthalate (DEHP) and di(isononyl) cyclohexane-1,2-dicarboxylate (HEXAMOLL^® DINCH) as plasticizer, were selected for assessment of complement activation, coagulation system and platelet activation...

article

Warming-yang moxibustion combined with acupuncture for 30 cases of cancer pain

Guang-qiang YI, Zeng-he LI, Rong-ning HUANG, Shu-zhong WEI, more

World Journal of Acupuncture - Moxibustion > 2012 > 22 > 4 > 41-44

To observe the clinical effect of warming-yang moxibustion combined with acupuncture in the treatment of cancer pain. Thirty patients with malignant tumor accompanied with moderate or severe cancer pain were treated with warming-yang moxibustion technique in combination with acupuncture. Zhōngw n ( CV 12), Guānyuán ( CV 4) and Shénquè ( CV 8) were applied with warming moxibustion, Hég ( LI...

article

Coupled partition of unity method and improved meshless weighted least-square method for two-dimensional interior structure–acoustic problem

Zhijiang Li, Peng Li, Zeng He, Guixiang Liu

Engineering Analysis with Boundary Elements > 2012 > 36 > 2 > 154-160

Conventional element based methods for modeling acoustic problems are limited to low-frequency applications due to the huge computational efforts. For high-frequency applications, probabilistic techniques, such as statistical energy analysis (SEA), are used. For medium-frequency range, currently no adequate and mature simulation methods exist. This paper discusses a two-dimensional (2D) coupled structure–acoustic...

article

An analysis for compressible flows in a packed bed with metathesis gas–solid reaction

Yuanyong Jiang, Zeng-he Xu, Xiaofeng Peng

International Communications in Heat and Mass Transfer > 2011 > 38 > 8 > 1033-1040

Taking into consideration the mass exchange between gas and solid, and the density change of gas mixture due to reaction, a model is proposed for compressible flows in a packed bed with isothermal metathesis gas–solid reaction aA(g)+bB(s)=cC(g)+dD(s), When a≠c, the ratio c/a greatly affects the flows of gas mixture, but for a=c, this coupled model reduces to the non-coupled model. One-dimensional...

article

A meshless Galerkin least-square method for the Helmholtz equation

Zeng He, Peng Li, Gaoyu Zhao, Han Chen

Engineering Analysis with Boundary Elements > 2011 > 35 > 6 > 868-878

The Helmholtz equation always suffers the so-called ‘pollution effect’, which is directly related to the dispersion for high wavenumber. The element-free Galerkin method (EFGM) has been successfully applied to acoustic problems and significantly reduced the dispersion error. Unfortunately, it is computationally expensive. In this paper, a two-dimensional (2-D) dispersion analysis is performed on the...

article

Dispersion and pollution of the improved meshless weighted least-square (IMWLS) solution for the Helmholtz equation

Zeng He, Peng Li, Zhijiang Li, Guixiang Liu

Engineering Analysis with Boundary Elements > 2011 > 35 > 5 > 791-801

The meshless weighted least-square (MWLS) method is a meshless method based on the moving least-square (MLS) approximation. Compared with the Galerkin based meshless methods, the MWLS avoids numerical integrations, which improves the computational efficiency significantly. The MLS may form ill-conditioned system of equations, an accurate solution of which is difficult to obtain. In this paper, by...

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INFONA - science communication portal

Search results for: Zeng He

PPC-based reactive hot melt polyurethane adhesive (RHMPA)—Efficient glues for multiple types of substrates

Molecular simulation of interfacial reaction between TiAl alloy melts and different coatings

Interactions between gas flow and reversible chemical reaction in porous media

Identification of rock discontinuity sets based on a modified affinity propagation algorithm

Optimal channels of the Garvey-Kelson mass relations in extrapolation

Isogeometric analysis of the nonlinear deformation of planar flexible beams with snap-back

Isogeometric Analysis of the Nonlinear Deformation of Planar Flexible Beams with Snap-back

Topology optimization of PCLD on plates for minimizing sound radiation at low frequency resonance

An integrated similarity metric for graph-based color image segmentation

A research on methods and applications of case study in public administration

Multi-generation product optimal pricing with strategic customer behavior

Neuro fuzzy model for predicting the dynamic characteristics of beams

Neuro Fuzzy Model for Predicting the Dynamic Characteristics of Beams

Polyamidoamine dendrimer conjugated chitosan nanoparticles for the delivery of methotrexate

In vitro investigation of the effect of plasticizers on the blood compatibility of medical grade plasticized poly (vinyl chloride)

Warming-yang moxibustion combined with acupuncture for 30 cases of cancer pain

Coupled partition of unity method and improved meshless weighted least-square method for two-dimensional interior structure–acoustic problem

An analysis for compressible flows in a packed bed with metathesis gas–solid reaction

A meshless Galerkin least-square method for the Helmholtz equation

Dispersion and pollution of the improved meshless weighted least-square (IMWLS) solution for the Helmholtz equation

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