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In this article, the nonlinear heat equilibrium problems are solved by the local multiquadric (MQ) radial basis function (RBF) collocation method. The system of nonlinear algebraic equations is solved by iteration based on the residual norm-based algorithm, in which the direction of evolution is determined by a linear equation. In addition, the role of the collocation point and source point is clearly defined such that in our proposed method the field value of any interested point can be expressed. Six numerical examples are shown to check the performance of the proposed method. As the number of supporting points (mp) increases, the accuracy of numerical solution increases. Among all examples, mp = 50 can perform well. In addition, the selection of shape parameter, c, affects the accuracy. However, as c < 2 the maximum relative absolute error percentage is less than 1%.
Weichung Yeih. Solving the Nonlinear Heat Equilibrium Problems Using the Local Multiquadric Radial Basis Function Collocation Method. Mathematics 2020, 8, 1289 .
AMA StyleWeichung Yeih. Solving the Nonlinear Heat Equilibrium Problems Using the Local Multiquadric Radial Basis Function Collocation Method. Mathematics. 2020; 8 (8):1289.
Chicago/Turabian StyleWeichung Yeih. 2020. "Solving the Nonlinear Heat Equilibrium Problems Using the Local Multiquadric Radial Basis Function Collocation Method." Mathematics 8, no. 8: 1289.
In this paper, a spacetime meshless method utilizing Trefftz functions for modeling subsurface flow problems with a transient moving boundary is proposed. The subsurface flow problem with a transient moving boundary is governed by the two-dimensional diffusion equation, where the position of the moving boundary is previously unknown. We solve the subsurface flow problems based on the Trefftz method, in which the Trefftz basis functions are obtained from the general solutions using the separation of variables. The solutions of the governing equation are then approximated numerically by the superposition theorem using the basis functions, which match the data at the spacetime boundary collocation points. Because the proposed basis functions fully satisfy the diffusion equation, arbitrary nodes are collocated only on the spacetime boundaries for the discretization of the domain. The iterative scheme has to be used for solving the moving boundaries because the transient moving boundary problems exhibit nonlinear characteristics. Numerical examples, including harmonic and non-harmonic boundary conditions, are carried out to validate the method. Results illustrate that our method may acquire field solutions with high accuracy. It is also found that the method is advantageous for solving inverse problems as well. Finally, comparing with those obtained from the method of fundamental solutions, we may obtain the accurate location of the nonlinear moving boundary for transient problems using the spacetime meshless method with the iterative scheme.
Cheng-Yu Ku; Chih-Yu Liu; Jing-En Xiao; Weichung Yeih; Chia-Ming Fan. A Spacetime Meshless Method for Modeling Subsurface Flow with a Transient Moving Boundary. Water 2019, 11, 2595 .
AMA StyleCheng-Yu Ku, Chih-Yu Liu, Jing-En Xiao, Weichung Yeih, Chia-Ming Fan. A Spacetime Meshless Method for Modeling Subsurface Flow with a Transient Moving Boundary. Water. 2019; 11 (12):2595.
Chicago/Turabian StyleCheng-Yu Ku; Chih-Yu Liu; Jing-En Xiao; Weichung Yeih; Chia-Ming Fan. 2019. "A Spacetime Meshless Method for Modeling Subsurface Flow with a Transient Moving Boundary." Water 11, no. 12: 2595.
This paper presents a study for solving the modified Helmholtz equation in layered materials using the multiple source meshfree approach (MSMA). The key idea of the MSMA starts with the method of fundamental solutions (MFS) as well as the collocation Trefftz method (CTM). The multiple source collocation scheme in the MSMA stems from the MFS and the basis functions are formulated using the CTM. The solution of the modified Helmholtz equation is therefore approximated by the superposition theorem using particular nonsingular functions by means of multiple sources located within the domain. To deal with the two-dimensional modified Helmholtz equation in layered materials, the domain decomposition method was adopted. Numerical examples were carried out to validate the method. The results illustrate that the MSMA is relatively simple because it avoids a complicated procedure for finding the appropriate position of the sources. Additionally, the MSMA for solving the modified Helmholtz equation is advantageous because the source points can be collocated on or within the domain boundary and the results are not sensitive to the location of source points. Finally, compared with other methods, highly accurate solutions can be obtained using the proposed method.
Cheng-Yu Ku; Jing-En Xiao; Weichung Yeih; Chih-Yu Liu; Ku; Xiao; Yeih; Liu. On Solving Modified Helmholtz Equation in Layered Materials Using the Multiple Source Meshfree Approach. Mathematics 2019, 7, 1114 .
AMA StyleCheng-Yu Ku, Jing-En Xiao, Weichung Yeih, Chih-Yu Liu, Ku, Xiao, Yeih, Liu. On Solving Modified Helmholtz Equation in Layered Materials Using the Multiple Source Meshfree Approach. Mathematics. 2019; 7 (11):1114.
Chicago/Turabian StyleCheng-Yu Ku; Jing-En Xiao; Weichung Yeih; Chih-Yu Liu; Ku; Xiao; Yeih; Liu. 2019. "On Solving Modified Helmholtz Equation in Layered Materials Using the Multiple Source Meshfree Approach." Mathematics 7, no. 11: 1114.
In this article, a newly developed multiple-source meshless method (MSMM) capable of solving inverse heat conduction problems in two dimensions is presented. Evolved from the collocation Trefftz method (CTM), the MSMM approximates the solution by using many source points through the addition theorem such that the ill-posedness is greatly reduced. The MSMM has the same superiorities as the CTM, such as the boundary discretization only, and is advantageous for solving inverse problems. Several numerical examples are conducted to validate the accuracy of solving inverse heat conduction problems using boundary conditions with different levels of noise. Moreover, the domain decomposition method is adopted for problems in the doubly-connected domain. The results demonstrate that the proposed method may recover the unknown data with remarkably high accuracy, even though the over-specified boundary data are assigned a portion that is less than 1/10 of the overall domain boundary.
Cheng-Yu Ku; Jing-En Xiao; Wei-Po Huang; Weichung Yeih; Chih-Yu Liu. On Solving Two-Dimensional Inverse Heat Conduction Problems Using the Multiple Source Meshless Method. Applied Sciences 2019, 9, 2629 .
AMA StyleCheng-Yu Ku, Jing-En Xiao, Wei-Po Huang, Weichung Yeih, Chih-Yu Liu. On Solving Two-Dimensional Inverse Heat Conduction Problems Using the Multiple Source Meshless Method. Applied Sciences. 2019; 9 (13):2629.
Chicago/Turabian StyleCheng-Yu Ku; Jing-En Xiao; Wei-Po Huang; Weichung Yeih; Chih-Yu Liu. 2019. "On Solving Two-Dimensional Inverse Heat Conduction Problems Using the Multiple Source Meshless Method." Applied Sciences 9, no. 13: 2629.
In this paper, an approach to improve the method of angular basis function (MABF) proposed by Young et al. (2015) is proposed. Instead of using lnr in the method of fundamental solution (MFS), the MABF adopts θ to construct the solution. However, since the nature of θ introduces multiple values along the branch cut such that to avoid the branch cut passing through the domain is an important issue (Li et al., 2018). Noticing this difficulty, Alves et al. (2018) first proposed a remedy which used a pair of two points to restrict the discontinuity appearing only along the line segment between two points, and they named this approach as cracklets. In this article, the two-point angular basis function (cracklets) is investigated deeply. We explain why for a multiply connected domain with a logarithm singular solution the cracklets will encounter failure. To resolve this difficulty, one can adopt the proposed method (cracklets) with the MFS or one can use domain decomposition method to separate the domain into several singly connected domains. Seven numerical examples are provided to show the validity of this method, and examples for dealing with the multiply connected domain are focused to support our claims.
Chung-Lun Kuo; Weichung Yeih; Cheng-Yu Ku; Chia-Ming Fan. The method of two-point angular basis function for solving Laplace equation. Engineering Analysis with Boundary Elements 2019, 106, 264 -274.
AMA StyleChung-Lun Kuo, Weichung Yeih, Cheng-Yu Ku, Chia-Ming Fan. The method of two-point angular basis function for solving Laplace equation. Engineering Analysis with Boundary Elements. 2019; 106 ():264-274.
Chicago/Turabian StyleChung-Lun Kuo; Weichung Yeih; Cheng-Yu Ku; Chia-Ming Fan. 2019. "The method of two-point angular basis function for solving Laplace equation." Engineering Analysis with Boundary Elements 106, no. : 264-274.
Chihyu Liu; Cheng Yu Ku; Jingen Xiao; Weichung Yeih. A Novel Spacetime Collocation Meshless Method for Solving Two-Dimensional Backward Heat Conduction Problems. Computer Modeling in Engineering & Sciences 2019, 118, 229 -252.
AMA StyleChihyu Liu, Cheng Yu Ku, Jingen Xiao, Weichung Yeih. A Novel Spacetime Collocation Meshless Method for Solving Two-Dimensional Backward Heat Conduction Problems. Computer Modeling in Engineering & Sciences. 2019; 118 (1):229-252.
Chicago/Turabian StyleChihyu Liu; Cheng Yu Ku; Jingen Xiao; Weichung Yeih. 2019. "A Novel Spacetime Collocation Meshless Method for Solving Two-Dimensional Backward Heat Conduction Problems." Computer Modeling in Engineering & Sciences 118, no. 1: 229-252.
In this study, the influence of three mixture variables named Sand/Aggregate ratio, Liquid/Binder ratio, and Paste/Aggregate ratio on the cementitious properties were studied. The durability of cementitious including absorption, absorption rate, resistivity, rapid chloride permeability index, and carbonation rate were examined. Results showed that the alkali-activated slag cementitious has superior durability. The trends of influences on the composites properties for these three mixture variables are similar to those for the ordinary Portland cement concrete. It means that the experiences for making the ordinary Portland cement concrete should be able to be used for the alkali-activated slag cementitious. This paper also provides a lot of data for the alkali-activated slag cementitious for future development of the mix design.
Chi-Che Hung; Yuan-Chieh Wu; Wei-Ting Lin; Jiang-Jhy Chang; Wei-Chung Yeih. Effect of Mixture Variables on Durability for Alkali-Activated Slag Cementitious. Materials 2018, 11, 2252 .
AMA StyleChi-Che Hung, Yuan-Chieh Wu, Wei-Ting Lin, Jiang-Jhy Chang, Wei-Chung Yeih. Effect of Mixture Variables on Durability for Alkali-Activated Slag Cementitious. Materials. 2018; 11 (11):2252.
Chicago/Turabian StyleChi-Che Hung; Yuan-Chieh Wu; Wei-Ting Lin; Jiang-Jhy Chang; Wei-Chung Yeih. 2018. "Effect of Mixture Variables on Durability for Alkali-Activated Slag Cementitious." Materials 11, no. 11: 2252.
This paper presents a novel space–time meshless method for solving the backward heat conduction problem (BHCP). A numerical approximation is obtained using the Trefftz basis function of the heat equation. The Trefftz method, which differs from conventional collocation methods based on a set of unstructured points in space, is used in this study to collocate boundary points in the space–time coordinate system such that the initial and boundary conditions can both be treated as boundary conditions on the space–time domain boundary. Because the solution in time on the boundary of the domain is unknown, the BHCP can be transformed into an inverse boundary value problem. The numerical solution is obtained by superpositioning the Trefftz base functions that automatically satisfy the governing equation. The validity of the proposed method is established for several test problems, including the one-dimensional BHCP and two-dimensional BHCP. The accuracy of the proposed method is compared with that of a conventional time-marching scheme based on the finite difference method. The results demonstrate that highly accurate numerical solutions can be obtained and errors may not accumulate over the entire time domain. Moreover, the boundary data on the inaccessible boundary can be recovered even when the partial data on the final time boundary are absent.
Cheng-Yu Ku; Chih-Yu Liu; Weichung Yeih; Chein-Shan Liu; Chia-Ming Fan. A novel space–time meshless method for solving the backward heat conduction problem. International Journal of Heat and Mass Transfer 2018, 130, 109 -122.
AMA StyleCheng-Yu Ku, Chih-Yu Liu, Weichung Yeih, Chein-Shan Liu, Chia-Ming Fan. A novel space–time meshless method for solving the backward heat conduction problem. International Journal of Heat and Mass Transfer. 2018; 130 ():109-122.
Chicago/Turabian StyleCheng-Yu Ku; Chih-Yu Liu; Weichung Yeih; Chein-Shan Liu; Chia-Ming Fan. 2018. "A novel space–time meshless method for solving the backward heat conduction problem." International Journal of Heat and Mass Transfer 130, no. : 109-122.
The purpose of this study is to discuss the properties of low water/cement ratio and high compressive strength pervious concrete. Two sizes of air-cooling electric arc furnace slag (EAFS), for the same size of 0.24 - 0.48 cm and 0.48 - 0.96 cm, were prepared as the coarse aggregates. Two water-to-cement ratios and three filled percentages (70, 80, and 90%) of voids by cement pastes were selected as variables. The unit weight, connected porosity, water permeability coefficient, compressive strength, and flexural strength of pervious concrete were conducted. Test results show that the pervious concrete with higher filled percentage of voids by cement paste has higher unit weight, compressive strength, and flexural strength and smaller connected porosity and water permeability coefficient. The lower the water/cement ratio and EAFS size, the superior the properties. At the water/cement ratio of 0.25, pervious concrete with EAFS size of 0.24 – 0.48 cm and 90% filled percentage of voids by cement pastes had the highest compressive strength of 35 MPa and flexural strength of 7 MPa.
Mao Chieh Chi; Jiang Jhy Chang; Wei Chung Yeih. Properties of Low Water/Cement Ratio and High Compressive Strength Pervious Concrete. Materials Science Forum 2018, 932, 136 -140.
AMA StyleMao Chieh Chi, Jiang Jhy Chang, Wei Chung Yeih. Properties of Low Water/Cement Ratio and High Compressive Strength Pervious Concrete. Materials Science Forum. 2018; 932 ():136-140.
Chicago/Turabian StyleMao Chieh Chi; Jiang Jhy Chang; Wei Chung Yeih. 2018. "Properties of Low Water/Cement Ratio and High Compressive Strength Pervious Concrete." Materials Science Forum 932, no. : 136-140.
A novel boundary-type meshless method for modeling geofluid flow in heterogeneous geological media was developed. The numerical solutions of geofluid flow are approximated by a set of particular solutions of the subsurface flow equation which are expressed in terms of sources located outside the domain of the problem. This pioneering study is based on the collocation Trefftz method and provides a promising solution which integrates the T-Trefftz method and F-Trefftz method. To deal with the subsurface flow problems of heterogeneous geological media, the domain decomposition method was adopted so that flux conservation and the continuity of pressure potential at the interface between two consecutive layers can be considered in the numerical model. The validity of the model is established for a number of test problems. Application examples of subsurface flow problems with free surface in homogenous and layered heterogeneous geological media were also carried out. Numerical results demonstrate that the proposed method is highly accurate and computationally efficient. The results also reveal that it has great numerical stability for solving subsurface flow with nonlinear free surface in layered heterogeneous geological media even with large contrasts in the hydraulic conductivity.
Jing-En Xiao; Cheng-Yu Ku; Liu Chih-Yu; Wei-Chung Yeih. A Novel Boundary-Type Meshless Method for Modeling Geofluid Flow in Heterogeneous Geological Media. Geofluids 2018, 2018, 1 -13.
AMA StyleJing-En Xiao, Cheng-Yu Ku, Liu Chih-Yu, Wei-Chung Yeih. A Novel Boundary-Type Meshless Method for Modeling Geofluid Flow in Heterogeneous Geological Media. Geofluids. 2018; 2018 ():1-13.
Chicago/Turabian StyleJing-En Xiao; Cheng-Yu Ku; Liu Chih-Yu; Wei-Chung Yeih. 2018. "A Novel Boundary-Type Meshless Method for Modeling Geofluid Flow in Heterogeneous Geological Media." Geofluids 2018, no. : 1-13.
In this paper, a novel meshless method for the transient modeling of subsurface flow in unsaturated soils was developed. A linearization process for the nonlinear Richards equation using the Gardner exponential model to analyze the transient flow in the unsaturated zone was adopted. For the transient modeling, we proposed a pioneering work using the collocation Trefftz method and utilized the coordinate system in Minkowski spacetime instead of that in the original Euclidean space. The initial value problem for transient modeling of subsurface flow in unsaturated soils can then be transformed into the inverse boundary value problem. A numerical solution obtained in the spacetime coordinate system was approximated by superpositioning Trefftz basis functions satisfying the governing equation for boundary collocation points on partial problem domain boundary in the spacetime coordinate system. As a result, the transient problems can be solved without using the traditional time-marching scheme. The validity of the proposed method is established for several test problems. Numerical results demonstrate that the proposed method is highly accurate and computationally efficient. The results also reveal that it has great numerical stability for the transient modeling of subsurface flow in unsaturated soils.
Cheng-Yu Ku; Chih-Yu Liu; Jing-En Xiao; Weichung Yeih. Transient Modeling of Flow in Unsaturated Soils Using a Novel Collocation Meshless Method. Water 2017, 9, 954 .
AMA StyleCheng-Yu Ku, Chih-Yu Liu, Jing-En Xiao, Weichung Yeih. Transient Modeling of Flow in Unsaturated Soils Using a Novel Collocation Meshless Method. Water. 2017; 9 (12):954.
Chicago/Turabian StyleCheng-Yu Ku; Chih-Yu Liu; Jing-En Xiao; Weichung Yeih. 2017. "Transient Modeling of Flow in Unsaturated Soils Using a Novel Collocation Meshless Method." Water 9, no. 12: 954.
The amount of circulating fluidized bed combustion (CFBC) ash is increasing and the disposal cost of CFBC ash have also been increasing annually. Hence, developing a better utilization of CFBC fly ash with the by-products ground granulated blast furnace slag (GGBFS) and coal fly ash is an urgent and important task. In this study, seven mixes with different blended cements were prepared to cast mortar specimens. Flow test, setting times test, water absorption rate, compressive strength test and flexural strength test were performed to investigate the properties of mortars. Test results show that the addition of coal fly ash, CFBC fly ash, and GGBFS improves the workability.When the amount of cement replacement by CFBC fly ash, GGBFS, and coal fly ash was recommended less than 20% simultaneously, the compressive strength is higher than that of plain cement mortar. However, CFBC fly ash would results in a lower strength when adding up to 30%. Thus, the amount of CFBC fly ash replacement cement was recommended to be limited below 20% and the total amount of cement replacement was limited below 60%.
Maochieh Chi; Jiang-Jhy Chang; Weichung Yeih. Effects of Circulated Fluidized-Bed Fly Ash, Ground Granulated Blast-Furnace Slag and Coal Fly Ash on Properties of Mortars. DEStech Transactions on Environment, Energy and Earth Sciences 2017, 1 .
AMA StyleMaochieh Chi, Jiang-Jhy Chang, Weichung Yeih. Effects of Circulated Fluidized-Bed Fly Ash, Ground Granulated Blast-Furnace Slag and Coal Fly Ash on Properties of Mortars. DEStech Transactions on Environment, Energy and Earth Sciences. 2017; (icnerr):1.
Chicago/Turabian StyleMaochieh Chi; Jiang-Jhy Chang; Weichung Yeih. 2017. "Effects of Circulated Fluidized-Bed Fly Ash, Ground Granulated Blast-Furnace Slag and Coal Fly Ash on Properties of Mortars." DEStech Transactions on Environment, Energy and Earth Sciences , no. icnerr: 1.
The purpose of this study is to determine the effects of aggregate size as well as the paste volume on unit weight, connected porosity, water permeability coefficient, compressive strength, and flexural strength of pervious concrete. Four aggregate sizes and four filled percentages of voids by cement pastes were selected as variables. Test results show that the unit weight, compressive strength, and flexural strength of pervious concrete increased with an increase of the filled percentage of voids by cement pastes, but decreased the connected porosity and water permeability coefficient. Pervious concrete with aggregate size of 0.24 – 0.4cm and 90% filled percentage of voids by cement pastes had the highest compressive strength of 25 MPa. Meanwhile, the water permeability of this mixture was higher than 0.01 cm/s which can be classified as the pervious concrete according to the Japan Road Association (JRA).
Mao-Chieh Chi; Ran Huang; Jiang-Jhy Chang; Wei-Chung Yeih. Effects of Particle Sizes and Cement Pastes on Mechanical Properties of Pervious Concrete. DEStech Transactions on Materials Science and Engineering 2017, 1 .
AMA StyleMao-Chieh Chi, Ran Huang, Jiang-Jhy Chang, Wei-Chung Yeih. Effects of Particle Sizes and Cement Pastes on Mechanical Properties of Pervious Concrete. DEStech Transactions on Materials Science and Engineering. 2017; (ammme):1.
Chicago/Turabian StyleMao-Chieh Chi; Ran Huang; Jiang-Jhy Chang; Wei-Chung Yeih. 2017. "Effects of Particle Sizes and Cement Pastes on Mechanical Properties of Pervious Concrete." DEStech Transactions on Materials Science and Engineering , no. ammme: 1.
In this article, the accuracy of the collocation Trefftz method (CTM) for solving two- and three-dimensional heat equations is investigated. The numerical solutions are approximated by superpositioning T-complete functions formulated using cylindrical harmonics. To avoid the ill-conditioning of the CTM, the characteristic lengths and the multiple-scale Trefftz method are adopted. The results reveal that for two-dimensional problems, the CTM can provide highly accurate numerical solutions, with the accuracy increasing with the order of the terms. For three-dimensional problems, highly accurate numerical solutions can be obtained using a certain order of terms, where the order is determined by performing an accuracy assessment.
Cheng-Yu Ku; Jing-En Xiao; Liu Chih-Yu; Weichung Yeih. On the accuracy of the collocation Trefftz method for solving two- and three-dimensional heat equations. Numerical Heat Transfer, Part B: Fundamentals 2016, 69, 1 -17.
AMA StyleCheng-Yu Ku, Jing-En Xiao, Liu Chih-Yu, Weichung Yeih. On the accuracy of the collocation Trefftz method for solving two- and three-dimensional heat equations. Numerical Heat Transfer, Part B: Fundamentals. 2016; 69 (4):1-17.
Chicago/Turabian StyleCheng-Yu Ku; Jing-En Xiao; Liu Chih-Yu; Weichung Yeih. 2016. "On the accuracy of the collocation Trefftz method for solving two- and three-dimensional heat equations." Numerical Heat Transfer, Part B: Fundamentals 69, no. 4: 1-17.
In this paper, the numerical solutions for groundwater flow in unsaturated layered soil using the Richards equation are presented. A linearisation process for the nonlinear Richards equation to deal with groundwater flow in unsaturated layered soil is derived. To solve one-dimensional flow in the unsaturated zone of layered soil profiles, flux conservation and the continuity of pressure potential at the interface between two consecutive layers are considered in the numerical model. In addition, a novel method, named the dynamical Jacobian-inverse free method, incorporated with a two-side equilibration algorithm for solving ill-conditioned systems with extreme contrasts in hydraulic conductivity is proposed. The validity of the model is established in numerous test problems by comparing the numerical results with the analytical solutions. The results show that the proposed method can improve convergence and numerical stability for solving groundwater flow in unsaturated layered soil with extreme contrasts in hydraulic conductivity.
Chih-Yu Liu; Cheng-Yu Ku; Chi-Chao Huang; Der-Guey Lin; Wei-Chung Yeih. Numerical Solutions for Groundwater Flow in Unsaturated Layered Soil with Extreme Physical Property Contrasts. International Journal of Nonlinear Sciences and Numerical Simulation 2015, 16, 325 -335.
AMA StyleChih-Yu Liu, Cheng-Yu Ku, Chi-Chao Huang, Der-Guey Lin, Wei-Chung Yeih. Numerical Solutions for Groundwater Flow in Unsaturated Layered Soil with Extreme Physical Property Contrasts. International Journal of Nonlinear Sciences and Numerical Simulation. 2015; 16 (7-8):325-335.
Chicago/Turabian StyleChih-Yu Liu; Cheng-Yu Ku; Chi-Chao Huang; Der-Guey Lin; Wei-Chung Yeih. 2015. "Numerical Solutions for Groundwater Flow in Unsaturated Layered Soil with Extreme Physical Property Contrasts." International Journal of Nonlinear Sciences and Numerical Simulation 16, no. 7-8: 325-335.
Chung-Lun Kuo; Weichung Yeih; Chein-Shan Liu; Jiang-Ren Chang. Solving Helmholtz equation with high wave number and ill-posed inverse problem using the multiple scales Trefftz collocation method. Engineering Analysis with Boundary Elements 2015, 61, 145 -152.
AMA StyleChung-Lun Kuo, Weichung Yeih, Chein-Shan Liu, Jiang-Ren Chang. Solving Helmholtz equation with high wave number and ill-posed inverse problem using the multiple scales Trefftz collocation method. Engineering Analysis with Boundary Elements. 2015; 61 ():145-152.
Chicago/Turabian StyleChung-Lun Kuo; Weichung Yeih; Chein-Shan Liu; Jiang-Ren Chang. 2015. "Solving Helmholtz equation with high wave number and ill-posed inverse problem using the multiple scales Trefftz collocation method." Engineering Analysis with Boundary Elements 61, no. : 145-152.
Maochieh Chi; Jiang-Jhy Chang; Weichung Yeih. Physical and Mechanical Properties of Concrete with Circulated Fluidized Bed Combustion Fly Ash, Ground Granulated Blast Furnace Slag and Coal Fly Ash. Proceedings of the 5th International Conference on Advanced Design and Manufacturing Engineering 2015, 1 .
AMA StyleMaochieh Chi, Jiang-Jhy Chang, Weichung Yeih. Physical and Mechanical Properties of Concrete with Circulated Fluidized Bed Combustion Fly Ash, Ground Granulated Blast Furnace Slag and Coal Fly Ash. Proceedings of the 5th International Conference on Advanced Design and Manufacturing Engineering. 2015; ():1.
Chicago/Turabian StyleMaochieh Chi; Jiang-Jhy Chang; Weichung Yeih. 2015. "Physical and Mechanical Properties of Concrete with Circulated Fluidized Bed Combustion Fly Ash, Ground Granulated Blast Furnace Slag and Coal Fly Ash." Proceedings of the 5th International Conference on Advanced Design and Manufacturing Engineering , no. : 1.
Weichung Yeih; Tun Chi Fu; Jiang Jhy Chang; Ran Huang. Properties of pervious concrete made with air-cooling electric arc furnace slag as aggregates. Construction and Building Materials 2015, 93, 737 -745.
AMA StyleWeichung Yeih, Tun Chi Fu, Jiang Jhy Chang, Ran Huang. Properties of pervious concrete made with air-cooling electric arc furnace slag as aggregates. Construction and Building Materials. 2015; 93 ():737-745.
Chicago/Turabian StyleWeichung Yeih; Tun Chi Fu; Jiang Jhy Chang; Ran Huang. 2015. "Properties of pervious concrete made with air-cooling electric arc furnace slag as aggregates." Construction and Building Materials 93, no. : 737-745.
The prevention of urban floods and heat islands has become key emerging topics following recent climate changes. Pervious concrete can be used to effectively promote rainwater run-off into the ground, conserve base water, control floods, and regulate temperature. In addition, integrating and applying recycled aggregates, such as slag, in pervious concrete is an emerging development trend for enhancing the protection of environmental sustainability. In this study, we investigated various quality characteristics of pervious concrete. We adopted the design of experiment method as the research method, in which orthogonal arrays, factor response analysis, and analysis of variance were used to analyze data, and water-cement ratio, aggregate size, aggregate type, and cement paste filler ratio were the control factors. The analysis results obtained in this study can serve as a reference for pervious concrete proportioning designs.
Tun Chi Fu; Ran Huang; Wei Chung Yeih; Jiang Jhy Chang; Pin Chan Lee. Study of the Pervious Concrete Properties Using the Experimental Design Method. Advanced Materials Research 2015, 1089, 253 -264.
AMA StyleTun Chi Fu, Ran Huang, Wei Chung Yeih, Jiang Jhy Chang, Pin Chan Lee. Study of the Pervious Concrete Properties Using the Experimental Design Method. Advanced Materials Research. 2015; 1089 ():253-264.
Chicago/Turabian StyleTun Chi Fu; Ran Huang; Wei Chung Yeih; Jiang Jhy Chang; Pin Chan Lee. 2015. "Study of the Pervious Concrete Properties Using the Experimental Design Method." Advanced Materials Research 1089, no. : 253-264.
Specimens were prepared by altering parameters such as aggregate sizes, binder materials, and the amounts of binder used and were subsequently tested by using permeability, porosity, mechanical strength, and soundness tests. The results indicated that the water permeability coefficient and connected porosity decreased as the amount of binder used increased and increased with increasing aggregate size. In the mechanical strength test, the compressive, splitting tensile, and flexural strengths increased as the amount of binder used increased and decreased with the increase of aggregate size. Highly viscous binder enhanced compressive strength, water permeability, and the resistance to sulfate attacks. In the mechanics and sulfate soundness tests, the mix proportion of alkali-activated slag paste used in this study exhibited a superior performance than the Portland cement pervious concrete (the control) did, but the difference in water permeability between the two types of concrete was insignificant. The mix proportions of cement paste containing 20% and 30% silica fume exhibited less mechanical strength than the control did. Moreover, compared with the control, the cement paste containing silica fume demonstrated poor resistance to sulfate attacks, and the difference in the water permeability between such specimen and the control was not noticeable.
Tun Chi Fu; Weichung Yeih; Jiang Jhy Chang; Ran Huang. The Influence of Aggregate Size and Binder Material on the Properties of Pervious Concrete. Advances in Materials Science and Engineering 2014, 2014, 1 -17.
AMA StyleTun Chi Fu, Weichung Yeih, Jiang Jhy Chang, Ran Huang. The Influence of Aggregate Size and Binder Material on the Properties of Pervious Concrete. Advances in Materials Science and Engineering. 2014; 2014 ():1-17.
Chicago/Turabian StyleTun Chi Fu; Weichung Yeih; Jiang Jhy Chang; Ran Huang. 2014. "The Influence of Aggregate Size and Binder Material on the Properties of Pervious Concrete." Advances in Materials Science and Engineering 2014, no. : 1-17.