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Whether to Delay the Release of eBooks or Not? An Analysis of Optimal Publishing Strategies for Book Publishers SSCI
期刊论文 | 2019 , 14 (2) , 124-137 | JOURNAL OF THEORETICAL AND APPLIED ELECTRONIC COMMERCE RESEARCH
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Abstract :

The eBooks market has been growing rapidly in recent years. At the same time, evidence shows that eBooks are cannibalizing the market for physical books. To alleviate the cannibalization effect between eBooks and physical books, publishers may choose to delay the release of eBooks or physical books for a period of time. Adopting a stylized two-period model, this paper investigates three publishing strategies for a monopolistic publisher: delaying the release of eBooks, delaying the release of physical books, and releasing them simultaneously. We find that the publisher should delay the format that has significantly less market potential. Furthermore, the one that has greater market potential should be priced higher. In addition, a stronger substitution effect between eBooks and physical books favors delaying strategies. Finally, the smaller marginal cost for eBooks than physical books renders the strategy to delay the release of physical books more popular.

Keyword :

Substitution effect eBook Pricing strategies Publishing strategies Cannibalization

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GB/T 7714 Li, Fan , Li, Shengli , Gu, Jiarong . Whether to Delay the Release of eBooks or Not? An Analysis of Optimal Publishing Strategies for Book Publishers [J]. | JOURNAL OF THEORETICAL AND APPLIED ELECTRONIC COMMERCE RESEARCH , 2019 , 14 (2) : 124-137 .
MLA Li, Fan 等. "Whether to Delay the Release of eBooks or Not? An Analysis of Optimal Publishing Strategies for Book Publishers" . | JOURNAL OF THEORETICAL AND APPLIED ELECTRONIC COMMERCE RESEARCH 14 . 2 (2019) : 124-137 .
APA Li, Fan , Li, Shengli , Gu, Jiarong . Whether to Delay the Release of eBooks or Not? An Analysis of Optimal Publishing Strategies for Book Publishers . | JOURNAL OF THEORETICAL AND APPLIED ELECTRONIC COMMERCE RESEARCH , 2019 , 14 (2) , 124-137 .
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Vibration localization for a rotating mistuning bladed disk with the Coriolis effect by a state-space decoupling method EI Scopus SCIE
期刊论文 | 2019 , 233 (3) , 1011-1020 | Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering
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Abstract :

Slight deviations of blades due to manufacturing tolerances can cause mistuning of bladed disk leading to localized vibration, which can accelerate fatigue. Moreover, the rotating blades are subjected to the Coriolis effect and the influence of the Coriolis force on the natural frequencies of high-speed rotational bladed disks such as those of an aero-engine become more apparent. In this paper, the effect of Coriolis force on the forced response localization of a mistuned bladed disk are investigated, for conditions where the natural frequency located in the first and second modal families of the bladed disk. Mistuning is introduced by varying the Young’s modulus of each blade. Due to the asymmetric Coriolis matrix, it is not possible to directly decouple the system. A state-space decoupling method is developed to decouple the system to effectively calculate the forced response of bladed disk with the consideration of the Coriolis effect. The results show that response localization factor is increased by 13.09% considering the Coriolis force compared to the system without considering the Coriolis effect, in the case of where the first modal family is considered. In addition, the response localization factor with the consideration of the Coriolis force is decreased by 30.85% compared to the system without considering the Coriolis force, when the second modal family is considered. It indicates that the forced response localization with the consideration of the Coriolis effect will be changed obviously with the rotational speed increasing, when the concerning natural frequency is located in the first and second modal families. Furthermore, the effect of Coriolis force causes changes in the resonant frequencies and resonant amplitude, but does not introduce additional resonant peaks for the case of the mistuned bladed disk. © 2017, © IMechE 2017.

Keyword :

Coriolis effect Forced response Localization factor localization vibration Manufacturing tolerances Mistuned bladed disks Resonant amplitude Vibration localization

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GB/T 7714 Kan, Xuanen , Xu, Zili . Vibration localization for a rotating mistuning bladed disk with the Coriolis effect by a state-space decoupling method [J]. | Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering , 2019 , 233 (3) : 1011-1020 .
MLA Kan, Xuanen 等. "Vibration localization for a rotating mistuning bladed disk with the Coriolis effect by a state-space decoupling method" . | Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 233 . 3 (2019) : 1011-1020 .
APA Kan, Xuanen , Xu, Zili . Vibration localization for a rotating mistuning bladed disk with the Coriolis effect by a state-space decoupling method . | Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering , 2019 , 233 (3) , 1011-1020 .
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General parameterized proximal point algorithm with applications in statistical learning EI Scopus SCIE
期刊论文 | 2019 , 96 (1) , 199-215 | International Journal of Computer Mathematics
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Abstract :

In the literature, there are a few researches to design some parameters in the proximal point algorithm (PPA), especially for the multi-objective convex optimizations. Introducing some parameters to PPA can make it more flexible and attractive. Mainly motivated by our recent work [Bai et al. A parameterized proximal point algorithm for separable convex optimization. Optim Lett. (2017) doi:10.1007/s11590-017-1195-9], in this paper we develop a general parameterized PPA with a relaxation step for solving the multi-block separable structured convex programming. By making use of the variational inequality and some mathematical identities, the global convergence and the worst-case (Formula presented.) convergence rate of the proposed algorithm are established. Preliminary numerical experiments on solving a sparse matrix minimization problem from statistical learning validate that our algorithm is more efficient than several state-of-the-art algorithms. © 2018 Informa UK Limited, trading as Taylor & Francis Group

Keyword :

complexity Minimization problems Numerical experiments Proximal point algorithm relaxation step State-of-the-art algorithms Statistical learning Variational inequalities

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GB/T 7714 Bai, Jianchao , Li, Jicheng , Dai, Pingfan et al. General parameterized proximal point algorithm with applications in statistical learning [J]. | International Journal of Computer Mathematics , 2019 , 96 (1) : 199-215 .
MLA Bai, Jianchao et al. "General parameterized proximal point algorithm with applications in statistical learning" . | International Journal of Computer Mathematics 96 . 1 (2019) : 199-215 .
APA Bai, Jianchao , Li, Jicheng , Dai, Pingfan , Li, Jiaofen . General parameterized proximal point algorithm with applications in statistical learning . | International Journal of Computer Mathematics , 2019 , 96 (1) , 199-215 .
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Investigation of characteristics of discharge pressure pulsation in a twin-screw refrigeration compressor EI Scopus SCIE
期刊论文 | 2019 , 233 (6) , 2206-2224 | Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science
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Abstract :

In this paper, characteristics of discharge pressure pulsation in a twin-screw refrigeration compressor are investigated. A thermodynamic model is developed and validated using data from a comprehensive experimental study. This validated model is then applied to investigate effects of key parameters including condensing temperature, compressor rotational speed, super-feed pressure, part-load operation, and design parameters on the discharge pressure pulsation. The results showed that the discharge pressure pulsation was mainly due to periodic variations of mass and energy flow from the working volumes to the discharge chamber. As the condensing temperature increased or decreased from the design condition, the compressor was in either over- or undercompression leading to an increase in the amplitude of the pressure pulsation. The gas super-feed pressure could increase the pressure pulsation at condensing temperatures below the design value and reduce the pressure pulsation at condensing temperatures above the design value. The analysis also demonstrated that the pressure pulsation was lower at part-load conditions. However, the compressor rotational speed increased both the amplitude and frequency of the pressure pulsation. Theoretical analysis of design parameters indicated that a large discharge volume with a high number of lobes could lower the pressure pulsation. These analyses provide useful information for the compressor design and optimization. © 2018, IMechE 2018.

Keyword :

Condensing temperature Discharge pressures Part load conditions Part load operation Pressure pulsation Refrigeration compressors Thermodynamic model Twin screw

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GB/T 7714 Chen, Wenqing , Wu, Xiaokun , Xing, Ziwen et al. Investigation of characteristics of discharge pressure pulsation in a twin-screw refrigeration compressor [J]. | Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science , 2019 , 233 (6) : 2206-2224 .
MLA Chen, Wenqing et al. "Investigation of characteristics of discharge pressure pulsation in a twin-screw refrigeration compressor" . | Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 233 . 6 (2019) : 2206-2224 .
APA Chen, Wenqing , Wu, Xiaokun , Xing, Ziwen , Wang, Xiaolin . Investigation of characteristics of discharge pressure pulsation in a twin-screw refrigeration compressor . | Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science , 2019 , 233 (6) , 2206-2224 .
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An intrinsic kinetics model to predict complex ash effects (ash film, dilution, and vaporization) on pulverized coal char burnout in air (O2/N2) and oxy-fuel (O2/CO2) atmospheres EI Scopus SCIE
期刊论文 | 2019 , 37 (3) , 2781-2790 | Proceedings of the Combustion Institute
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Abstract :

During coal combustion, char chemical reaction is the slowest step, particularly in the last burnout stage, where the char consists of small amounts of carbon in a predominant ash framework. Existing kinetics models tend to deviate from experimental measurements of late char burnout due to the incomplete treatment of ash effects. Ash can improve pore evolution through vaporization, hinder oxygen transport by forming an ash film, and reduce active carbon sites and available surface per unit volume by penetrating into the char matrix. In this work, a sophisticated kinetics model, focusing on these three ash evolution mechanisms (ash vaporization, ash film, and ash dilution) during pulverized coal (PC) char combustion, is developed by integrating them into a thorough mechanistic picture. Further, a detailed comparison of the three distinct ash effects on PC char conversion during air (O2/N2) and oxy-fuel (O2/CO2) combustion is performed. For the modeled coal, the mass of ash vaporization is approximate 3 orders less than the mass of ash remaining, which participates in ash dilution and ash film formation, both in O2/N2and O2/CO2atmospheres. The influence of these phenomena on burnout time follows the order: ash dilution > ash film > ash vaporization. The influence of ash vaporization on burnout time is minor, but through interactions with the ash dilution and ash film forming processes it can have an impact at high extents of burnout, particularly in O2/CO2atmospheres. In O2/N2atmospheres the residual ash predominately exists as an ash film, whereas it mainly exists as diluted ash in the char matrix in O2/CO2atmospheres. The residual ash particle is encased by a thick film when the ash film forming fraction is high (low ash dilution fraction). These results provide in-depth insights into the conversion of PC char and further utilization of the residual ash. © 2018 Elsevier Ltd.

Keyword :

Ash vaporization Char combustion Evolution mechanism Further utilization Intrinsic kinetics Kinetics modeling Oxygen transport Pulverized coals

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GB/T 7714 Niu, Yanqing , Liu, Siqi , Shaddix, Christopher R. et al. An intrinsic kinetics model to predict complex ash effects (ash film, dilution, and vaporization) on pulverized coal char burnout in air (O2/N2) and oxy-fuel (O2/CO2) atmospheres [J]. | Proceedings of the Combustion Institute , 2019 , 37 (3) : 2781-2790 .
MLA Niu, Yanqing et al. "An intrinsic kinetics model to predict complex ash effects (ash film, dilution, and vaporization) on pulverized coal char burnout in air (O2/N2) and oxy-fuel (O2/CO2) atmospheres" . | Proceedings of the Combustion Institute 37 . 3 (2019) : 2781-2790 .
APA Niu, Yanqing , Liu, Siqi , Shaddix, Christopher R. , Hui, Shi'en . An intrinsic kinetics model to predict complex ash effects (ash film, dilution, and vaporization) on pulverized coal char burnout in air (O2/N2) and oxy-fuel (O2/CO2) atmospheres . | Proceedings of the Combustion Institute , 2019 , 37 (3) , 2781-2790 .
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Transient responses of a hollow cylinder under thermal and chemical shock based on generalized diffusion-thermoelasticity with memory-dependent derivative EI Scopus SCIE
期刊论文 | 2019 , 42 (3) , 313-331 | Journal of Thermal Stresses
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Abstract :

The accurate description of the interactions of temperature, concentration and strain fields is of great importance for the fabrication of micro/nano-electromechanical devices. This article aims to conduct an analytical study of transient responses of a hollow cylinder under thermal and chemical shock in the context of generalized diffusion–thermoelasticity with memory-dependent derivative. The outer surface of the cylinder is assumed to be traction free and subjected to transient thermal and chemical shock loadings, while its inner surface is taken to be in contact with a rigid surface and is thermally isolated. The governing equations are obtained and solved by using Laplace transformation methods. The dimensionless results of temperature, chemical potential, displacement, stress, concentration, heat flux, and diffusion flux along the radial direction of the cylinder are obtained and illustrated graphically. Parametric studies are also performed to evaluate the influences of time delay and kernel function on transient thermoelasto-diffusive responses. © 2018, © 2018 Taylor & Francis Group, LLC.

Keyword :

Analytical studies Generalized diffusion Governing equations Hollow cylinders Kernel function Laplace transformations Parametric study Radial direction

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GB/T 7714 Li, Chenlin , Guo, Huili , Tian, Xiaogeng . Transient responses of a hollow cylinder under thermal and chemical shock based on generalized diffusion-thermoelasticity with memory-dependent derivative [J]. | Journal of Thermal Stresses , 2019 , 42 (3) : 313-331 .
MLA Li, Chenlin et al. "Transient responses of a hollow cylinder under thermal and chemical shock based on generalized diffusion-thermoelasticity with memory-dependent derivative" . | Journal of Thermal Stresses 42 . 3 (2019) : 313-331 .
APA Li, Chenlin , Guo, Huili , Tian, Xiaogeng . Transient responses of a hollow cylinder under thermal and chemical shock based on generalized diffusion-thermoelasticity with memory-dependent derivative . | Journal of Thermal Stresses , 2019 , 42 (3) , 313-331 .
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Towards a kinetic understanding of the NOx sensitization effect on unsaturation hydrocarbons: A case study of ethylene/nitrogen dioxide mixtures EI Scopus SCIE
期刊论文 | 2019 , 37 (1) , 719-726 | Proceedings of the Combustion Institute
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Abstract :

Ignition delay time (IDT) measurements for ethylene (C2H4)/nitrogen dioxide (NO2)/oxygen/argon mixtures with various blending ratios of NO2/C2H4 = 0/100, 15/85 and 50/50 were performed in a shock tube. The sensitization effect of NO2 on C2H4 ignition was investigated at pressures ranging from 1.2 to 10 atm, in the temperature range 920-1780 K, and at equivalence ratios from 0.5 to 2.0. Similar to our recent studies of NO2 effects on CH4 and C2H6 ignition (Deng et al., 2016; Deng et al., 2017), the effect of NO2 addition on measured IDTs of the unsaturated hydrocarbon C2H4 also exhibits both temperature- and pressure- dependences. NO2 addition generally promotes the reactivity of ethylene and the promotion effect is more pronounced for the mixtures with high NO2 content at higher pressures (p > 4.0 atm), at lower temperatures (T < 1200 K) and for fuel-rich mixtures. However, NO2 shows only a limited effect at lower pressures (p < 4.0 atm) and at higher temperatures (T > 1250 K). A detailed kinetic mechanism of C2H4/NO2 was proposed by refining critical reactions through incorporating ab-initio calculations from this study and recently published rate constant data. This mechanism is capable of reproducing the new data reported in this work and literature ones as well and has thus been used to perform sensitivity and flux analyses to kinetically interpret the interaction of NO2 with C2H4. © 2018 The Combustion Institute.

Keyword :

Ab initio calculations Auto-ignition Detailed kinetic mechanisms Ignition delay time Kinetic analysis Nitrogen dioxides Temperature and pressures Unsaturated hydrocarbons

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GB/T 7714 Deng, Fuquan , Zhang, Yingjia , Sun, Wuchuan et al. Towards a kinetic understanding of the NOx sensitization effect on unsaturation hydrocarbons: A case study of ethylene/nitrogen dioxide mixtures [J]. | Proceedings of the Combustion Institute , 2019 , 37 (1) : 719-726 .
MLA Deng, Fuquan et al. "Towards a kinetic understanding of the NOx sensitization effect on unsaturation hydrocarbons: A case study of ethylene/nitrogen dioxide mixtures" . | Proceedings of the Combustion Institute 37 . 1 (2019) : 719-726 .
APA Deng, Fuquan , Zhang, Yingjia , Sun, Wuchuan , Huang, Wenlin , Zhao, Qian , Qin, Xiaokang et al. Towards a kinetic understanding of the NOx sensitization effect on unsaturation hydrocarbons: A case study of ethylene/nitrogen dioxide mixtures . | Proceedings of the Combustion Institute , 2019 , 37 (1) , 719-726 .
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Domain Adaption via Feature Selection on Explicit Feature Map EI Scopus SCIE
期刊论文 | 2019 , 30 (4) , 1180-1190 | IEEE Transactions on Neural Networks and Learning Systems
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Abstract :

In most domain adaption approaches, all features are used for domain adaption. However, often, not every feature is beneficial for domain adaption. In such cases, incorrectly involving all features might cause the performance to degrade. In other words, to make the model trained on the source domain work well on the target domain, it is desirable to find invariant features for domain adaption rather than using all features. However, invariant features across domains may lie in a higher order space, instead of in the original feature space. Moreover, the discriminative ability of some invariant features such as shared background information is weak, and needs to be further filtered. Therefore, in this paper, we propose a novel domain adaption algorithm based on an explicit feature map and feature selection. The data are first represented by a kernel-induced explicit feature map, such that high-order invariant features can be revealed. Then, by minimizing the marginal distribution difference, conditional distribution difference, and the model error, the invariant discriminative features are effectively selected. This problem is NP-hard to be solved, and we propose to relax it and solve it by a cutting plane algorithm. Experimental results on six real-world benchmarks have demonstrated the effectiveness and efficiency of the proposed algorithm, which outperforms many state-of-the-art domain adaption approaches. IEEE

Keyword :

Adaptation models Distribution distance Domain adaptions Kernel Transfer learning

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GB/T 7714 Deng, Wan-Yu , Lendasse, Amaury , Ong, Yew-Soon et al. Domain Adaption via Feature Selection on Explicit Feature Map [J]. | IEEE Transactions on Neural Networks and Learning Systems , 2019 , 30 (4) : 1180-1190 .
MLA Deng, Wan-Yu et al. "Domain Adaption via Feature Selection on Explicit Feature Map" . | IEEE Transactions on Neural Networks and Learning Systems 30 . 4 (2019) : 1180-1190 .
APA Deng, Wan-Yu , Lendasse, Amaury , Ong, Yew-Soon , Tsang, Ivor Wai-Hung , Chen, Lin , Zheng, Qing-Hua . Domain Adaption via Feature Selection on Explicit Feature Map . | IEEE Transactions on Neural Networks and Learning Systems , 2019 , 30 (4) , 1180-1190 .
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A Novel Buck-Boost Converter with Low Electric Stress on Components EI Scopus SCIE
期刊论文 | 2019 , 66 (4) , 2703-2713 | IEEE Transactions on Industrial Electronics
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Abstract :

A novel buck-boost converter with low electric stress on components and negative output voltage is proposed. The operational principle, steady-state analysis, and small-signal modeling of the proposed buck-boost converter in continuous conduction mode are presented. Comparisons among another five buck-boost converters and the proposed buck-boost converter are presented. It is found that the proposed converter's voltage gain is smaller than the other converters' in step-down mode. Also, based upon the comparisons among the same kind and same number of components, the voltage and current stresses on the power switch of the proposed buck-boost converter are less than or equal to those of the comparative converters, and the voltage stress on the charge pump capacitor and the switching device power rating of the proposed buck-boost converter are always lower than those of other comparative converters. The efficiency of the proposed buck-boost converter is highest among those converters having the same number of elements. These advantages make component selection for the proposed converter much easier, and it can be used directly in applications needing a negative voltage source. Finally, simulation results and circuit experiments are given for validating the effectiveness of the proposed buck-boost converter. IEEE

Keyword :

Buck boost converter Continuous conduction mode Electric stress Number of components Operational principles Steady state Steady-state analysis Switching device power

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GB/T 7714 Li, Jing , Liu, Jinjun . A Novel Buck-Boost Converter with Low Electric Stress on Components [J]. | IEEE Transactions on Industrial Electronics , 2019 , 66 (4) : 2703-2713 .
MLA Li, Jing et al. "A Novel Buck-Boost Converter with Low Electric Stress on Components" . | IEEE Transactions on Industrial Electronics 66 . 4 (2019) : 2703-2713 .
APA Li, Jing , Liu, Jinjun . A Novel Buck-Boost Converter with Low Electric Stress on Components . | IEEE Transactions on Industrial Electronics , 2019 , 66 (4) , 2703-2713 .
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Effect of geometry error on accuracy of large-diameter pads used for CMP dressing EI Scopus SCIE
期刊论文 | 2019 , 100 (5-8) , 1505-1520 | International Journal of Advanced Manufacturing Technology
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Abstract :

Large-diameter polishing pads play an important role in chemical mechanical polishing (CMP) and are vital to large-aperture plane optics. The surface profile of a wafer is closely related to the profile accuracy of the polyurethane pad. To attain a high-precision surface, the polishing pad is dressed using a diamond dresser. In the present study, a pad dressing model was proposed as a means of analysing how any geometry errors in the polishing machine affect the profile accuracy by observing the trajectory of the moving dresser tool. Based on the spherical surface generation method, the influence of any tilt and motion error on the profile accuracy of the pad was studied. To verify the accuracy of the model, a variety of analyses and dressing experiments were performed using PPS100 and KPJ1700 CMP machines. The results of these experiments showed that the proposed model could effectively predict the profile accuracy of the pad after the dressing process. However, because of uncertainty in the measurements, there was a degree of error between the predicted and measured values, although this was never > 5%. Moreover, the results demonstrated that the main geometry error was the dressing spindle’s tilt angle which, if minimised, resulted in a higher dressing profile accuracy for the polyurethane pad. © 2018, Springer-Verlag London Ltd., part of Springer Nature.

Keyword :

Chemical mechanical polishing(CMP) Geometry errors Measured values Polishing pads Polyurethane pads Profile accuracies Spherical surface Surface profiles

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GB/T 7714 Ban, X.X. , Zhao, H.Y. , Zhao, S.J. et al. Effect of geometry error on accuracy of large-diameter pads used for CMP dressing [J]. | International Journal of Advanced Manufacturing Technology , 2019 , 100 (5-8) : 1505-1520 .
MLA Ban, X.X. et al. "Effect of geometry error on accuracy of large-diameter pads used for CMP dressing" . | International Journal of Advanced Manufacturing Technology 100 . 5-8 (2019) : 1505-1520 .
APA Ban, X.X. , Zhao, H.Y. , Zhao, S.J. , Xie, R.Q. , Gu, Y.W. , Zhu, X.L. et al. Effect of geometry error on accuracy of large-diameter pads used for CMP dressing . | International Journal of Advanced Manufacturing Technology , 2019 , 100 (5-8) , 1505-1520 .
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