Curve modeling is one of the basic work in computer aided geometric design and computer graphics. For the implicit conic fitting problem in this paper, the research methods that the objective function based on the min...Curve modeling is one of the basic work in computer aided geometric design and computer graphics. For the implicit conic fitting problem in this paper, the research methods that the objective function based on the minimal algebraic distance and geometric distance are summarized. The advantages and disadvantages of every method are analyzed simply, and the applications of the conic fitting are listed.展开更多
This paper discusses the problem that constructing a curve to satisfy the given endpoint constraints and chord-length parameters. Based on the research of Lu, the curve construction method for the entire tangent angle...This paper discusses the problem that constructing a curve to satisfy the given endpoint constraints and chord-length parameters. Based on the research of Lu, the curve construction method for the entire tangent angles region （α0, α1）∈（-r, r）×（-r, r） is given. Firstly, to ensure the weights are always positive, the three characteristics of cubic rational Bezier curve is proved, then the segment construction idea for the other tangent angles are presented in view of the three characteristics. The curve constructed with the new method satisfies the endpoint constraint and chord-length parameters, it＇s G1 continuous in every segment curve, and the shapes of the curve are well.展开更多
This research contributes to understanding the spillover effect of customer digital transformation along the supply chain.We take a supply chain relationship perspective to explore the influence of customers’digital ...This research contributes to understanding the spillover effect of customer digital transformation along the supply chain.We take a supply chain relationship perspective to explore the influence of customers’digital transformation on suppliers’audit fees and find a significant reduction in such fees when customers undergo digital transformation.An economic mechanism analysis reveals that this transformation reduces audit fees by lowering the risks and costs encountered by auditors.This is achieved by mitigating suppliers’business risks and improving earnings quality.Heterogeneity analysis reveals that the impact of customers’digital transformation on suppliers’audit fees is more pronounced when the supply chain is geographically distant,suppliers with more specific investments and with high levels of market competition.展开更多
文摘Curve modeling is one of the basic work in computer aided geometric design and computer graphics. For the implicit conic fitting problem in this paper, the research methods that the objective function based on the minimal algebraic distance and geometric distance are summarized. The advantages and disadvantages of every method are analyzed simply, and the applications of the conic fitting are listed.
基金Supported by Shandong Province Higher Educational Science and Technology Program(No.J12LN34)Shandong Ji'nan College and Institute Independent Innovation Project(No.201303011,No.201303021,No.201303016)
文摘This paper discusses the problem that constructing a curve to satisfy the given endpoint constraints and chord-length parameters. Based on the research of Lu, the curve construction method for the entire tangent angles region （α0, α1）∈（-r, r）×（-r, r） is given. Firstly, to ensure the weights are always positive, the three characteristics of cubic rational Bezier curve is proved, then the segment construction idea for the other tangent angles are presented in view of the three characteristics. The curve constructed with the new method satisfies the endpoint constraint and chord-length parameters, it＇s G1 continuous in every segment curve, and the shapes of the curve are well.
基金support provided by the Fundamental Research Funds for the Central Universities,Zhongnan University of Economics and Law(202411107).
文摘This research contributes to understanding the spillover effect of customer digital transformation along the supply chain.We take a supply chain relationship perspective to explore the influence of customers’digital transformation on suppliers’audit fees and find a significant reduction in such fees when customers undergo digital transformation.An economic mechanism analysis reveals that this transformation reduces audit fees by lowering the risks and costs encountered by auditors.This is achieved by mitigating suppliers’business risks and improving earnings quality.Heterogeneity analysis reveals that the impact of customers’digital transformation on suppliers’audit fees is more pronounced when the supply chain is geographically distant,suppliers with more specific investments and with high levels of market competition.
