Xing Fang

Microstructural evolution mechanisms of polymer-metal composite coatings on steel during sintering

Qi Zhang, Yanxin Wu, Lei Cheng, Yilin Zhao et autres

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A robust M-estimation framework for spatial autoregressive models: loss function design and optimization strategies

Wenxi Zhan, Yu Hu, Wenxian Zeng, Xing Fang

Spatial autoregressive (SAR) models are frequently applied in geographic research to account for spatial dependence. Although robust estimation methods (e.g. M-estimation) within SAR models have been investigated recently, key challenges remain: (1) How should the loss function be rationally designed in M-estimation …

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Enhancing social media engagement: Speech act strategies across influencer types

Xing Fang, Xingyu Huang

Influencers play a critical role in driving audience engagement. This study examines the impact of influencers' speech acts (e.g., expressive, assertive, directive, and interrogative) on audience engagement. Utilizing natural language processing (NLP) and econometric analysis , we analyze a diverse sample of …

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Distance‐Based Agglomeration Externalities and the Survival of Logistics Firms: Evidence From a Publicly Developed Logistics Park

Nannan He, Ming Jian, Xing Fang, Guoqi Li et autres

ABSTRACT Numerous studies have shown that agglomeration externalities play a crucial role in the survival prospects of logistics firms. However, previous studies have largely ignored the role that agglomeration externalities play at a more granular level. Therefore, this paper used Chengdu International …

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Characterization of long-term evolution of leakage rates of O-ring seals in nuclear power plant under high-temperature and high-pressure conditions

Ming Li, Lei He, Dengke Zheng, Xing Fang et autres

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Nonlinear least-squares solutions to the TLS multi-station registration adjustment problem

Yu Hu, Xing Fang, Wenxian Zeng

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Toward a unified approach to the total least-squares adjustment

Yu Hu, Xing Fang, Wenxian Zeng

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On the symmetric transformation with geometric constraints

Wenxi Zhan, Wenxian Zeng, Yibin Yao, Xing Fang et autres

Coordinate transformation is a fundamental issue in the related studies of measurement. However, existing methodologies often need to pay more attention to the available spatial information, leading to suboptimal results. This paper addresses this issue by incorporating geometric constraints into the symmetric …

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Microstructure and mechanical properties of the laser welded air-hardening steel joint

Xing Fang, Yanxin Wu, Xiaoyu Yang, Yonggang Yang et autres

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Total Least Squares Estimation in Hedonic House Price Models

Wenxi Zhan, Yu Hu, Wenxian Zeng, Xing Fang et autres

In real estate valuation using the Hedonic Price Model (HPM) estimated via Ordinary Least Squares (OLS) regression, subjectivity and measurement errors in the independent variables violate the Gauss–Markov theorem assumption of a non-random coefficient matrix, leading to biased parameter estimates and incorrect …

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Center strategies for universal geodetic transformations: modified iteration policy and two alternative models

Wenxi Zhan, Xing Fang, Wenxian Zeng

Although centralized coordinates are applied in geodetic coordinate transformations implicitly or explicitly, the centering strategy has not been comprehensively investigated from the theoretical perspective. We rigorously model and extend the empirically used three center strategies based on different models:Original model: Based on …

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Nonlinear least-squares solution for the multi-station stacking problem in realizing a terrestrial reference frame

Yu Hu, Xing Fang, Wenxian Zeng

Multi-station (or time series) stacking is a fundamental task in the realization of a terrestrial reference frame (TRF), which is, however, rank-deficient in nature due to the arbitrarily selected target frame. In practice, such a model is approximated as a linear form …

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