Yanyi Xu

Shanghai University

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Trends

Author Order

Document Type

Co-Authors

Arnab Bisi

Johns Hopkins University

Maqbool Dada

Johns Hopkins University

Yunhu Zhang

Shanghai University

Qijie Zhai

Shanghai University

Changjiang Song

Heilongjiang Academy of Sciences

Hong Zheng

Shanghai University

Suresh Chand

Purdue University West Lafayette

Tianqing Zheng

Institute of Crop Sciences

Doğan A. Serel

Institute of Management Technology

Xincheng Miao

University of Science and Technology Liaoning

Cooperative Institutions

Shanghai University

Chinese Academy of Sciences

University of Queensland

Purdue University West Lafayette

University of Hong Kong

Shanghai University of Engineering Science

Shanghai Research Institute of Materials

Johns Hopkins University

William Carey University

Xiamen University

Author Statistics

Papers

Citation

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Research Field

Evolution of Electromagnetic Fields and Forced Flow in a Metal Melt under the Impact of Hot‐Top Pulsed Magneto‐Oscillation

steel research international (2024)

Yulan Zhou Gang Chen Yunhu Zhang Junjie Wang Yanyi Xu

Hot‐top pulsed magneto‐oscillation (HPMO) is developed as a novel approach to achieve grain refinement and solute homogenization in heavy steel ingots. Through a combination of numerical simulations and melt flow measurements, this study investigates the evolution of electromagnetic fields and forced flow within alloy melts under the influence of HPMO, with a focus on varying electromagnetic parameters such as electric current intensity, frequency, and pulse length. The results of the simulations reveal the formation of double‐circulating flows in opposite directions within the melt. Experimental measurements of the flow field distribution closely align with the simulation outcomes. Furthermore, it is observed that the induced magnetic field inside the melt changes direction once, and the electromagnetic force changes direction three times within a single pulse length period under the influence of HPMO. Notably, the radial electromagnetic force, directed toward the interior of the melt, surpasses the normal electromagnetic force away from the melt. This phenomenon leads to a stable flow of the melt, contributing to grain refinement. The findings presented in this study offer valuable insights into the use of HPMO as a promising technique for improving the quality of heavy steel ingots.

Oscillation (cell signaling)

Magneto

Melt flow index

10.1002/srin.202400008

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Wholesale-price contracts with postponed and fixed retail prices

Operations Research Letters (2012)

Yanyi Xu Arnab Bisi

Postponement

Unimodality

10.1016/j.orl.2012.04.001

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Citations (21)

Investigating the Grain Refinement Mechanisms of Pulsed Electric Current, Ultrasonic and Melt Stirring Solidification of Pure Aluminium

JOM (2021)

Nagasivamuni Balasubramani Yanyi Xu Yunhu Zhang Qijie Zhai Gui Wang

Equiaxed crystals

10.1007/s11837-021-04904-7

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Citations (6)

Investment Decision-Making in Retail Supply Chain with RFID Technology

Guanli xuebao (2013)

Yanyi Xu

This paper conducts a research on RFID technology investment decision-making in a two-level retail supply chain suffering from inventory misplacement and shrinkage.The models of the supply chain with and without RFID technology are constructed and analyzed,in which buy back contracts are introduced to realize supply chain Pareto dominance.Then the cost threshold at which RFID adoption becomes profitable for both partners in retail supply chain is obtained.The results show that buy back contracts can coordinate the supply chain under implementation of RFID.And the higher production costs and inventory costs of commodities,the higher misplacement rate and shrinkage rate,the willingness of supply chain enterprises to invest in RFID will be stronger.

Investment

Dominance (genetics)

Source

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Two-phase bundling strategy with limited capacity

Zhou Ling Yanyi Xu

Bundling, as an effective marketing model, has been gradually applied in all fields since the 1970s. Although there has many researches on bundling, the two-phase bundling strategy is still rare. This study considers a retailer who has a limited capacity of products sells two types of independent products in two periods, which the retailer can choose to sell products separately (pure components, PC) or bundled (pure bundling, PB) in different period. So there are four strategies the retailer can choose, i.e., PC-PC, PB-PB, PC-PB, and PB-PC. The research compares them, and the results show that the best bundling strategy depends on the capacity of two products.

10.1145/3306500.3306508

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Structural properties of the lost sales problem with fractional lead times

Operations Research Letters (2019)

Yanyi Xu Sang-Phil Kim Arnab Bisi Suresh Chand Maqbool Dada

Lead time

Lost sales

Stock (firearms)

Holding cost

Base (topology)

10.1016/j.orl.2019.07.008

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Citations (2)

Erratum: Introductory pricing, market development and profit sharing

Journal of Revenue and Pricing Management (2015)

Chun Qiu Yanyi Xu

Yield management

Profit sharing

10.1057/rpm.2015.35

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A finite-horizon inventory system with partial backorders and inventory holdback

Operations Research Letters (2017)

Yanyi Xu Arnab Bisi Maqbool Dada

Inventory cost

Lost sales

Stock (firearms)

Stockout

10.1016/j.orl.2017.04.007

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Citations (18)

Price Postponement in a Newsvendor Model with Wholesale Price-Only Contracts

Yanyi Xu Arnab Bisi

We consider a variant of the wholesale price-only contract in a simple supply chain consisting of one manufacturer and one retailer, where the manufacturer is the Stackelberg leader and the retailer is the follower. In our model, the manufacturer decides the wholesale price first, and then the retailer chooses his order quantity before the stochastic demand is realized but postpones his pricing decision until after the realization of demand. The existing literature on this model has established structural results under restrictive conditions. In this study, we show that the optimal policies are unique and profit functions are unimodal for both manufacturer and retailer under mild conditions on the demand distribution. We consider both multiplicative and additive demand models. Insights are developed from analyzing the structures of the optimal policies. Our results contribute as well as generalize the existing results in the literature.

Newsvendor model

Stackelberg competition

Postponement

Source

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Citations (1)

Price Postponement in a Decentralized Newsvendor Model under Uncertain Supply and Demand

DEStech Transactions on Social Science Education and Human Science (2017)

Xiaoqin Zhang Yanyi Xu

With the rise of global procurement, economic globalization, on the one hand, promotes the development of supply chain; on the other hand it also increases the risk of supply chain, which makes the supply increasingly uncertain. According to the newsvendor model, we analyze the effect of price postponement in a decentralized newsvendor model with additive and price-dependent demand, wherein the supplier sets the wholesale price, and the retailer determines the order quantity and retail price. Such postponement strategies can be used by the retailer by delaying his retail price until after supply and demand uncertainties are observed. This research demonstrates the existence and uniqueness of the optimal order quantity of the retailer. We further shows that retailer adopts the price postponement strategy can reduce market uncertainty risk for retailers under the price dependent stochastic demand and uncertain supply by numerical simulation. At the same time, with the increase of the supplierâ€™s production cost, the selling price (or expected price) will increase, order quantity will decrease, and the expected profit of the supplier and retailer will decrease under pricing postponement model.

Postponement

Newsvendor model

10.12783/dtssehs/hsc2016/3490

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