Chao Zhou

Coupled calculation of transient temperature, pressure and cuttings transport and its applications in drilling

Xiaole Guo, Zheng Duan, Chao Zhou, Xingcai Li et autres

Abstract Hydraulics monitoring is an important component of intelligent drilling. Although wellbore temperature, pressure, and cuttings transport have been investigated separately, few models incorporate all these factors and are used for real-time monitoring. Based on previous studies, this work develops a coupling …

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Convergence Analysis of Controlled Particle Systems Arising in Deep Learning: From Finite to Infinite Sample Size

Huafu Liao, Alpár R. Mészáros, Chenchen Mou, Chao Zhou

Abstract This paper deals with a class of neural SDEs and studies the limiting behavior of the associated sampled optimal control problems as the sample size grows to infinity. The neural SDEs with N samples can be linked to the N -particle …

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A nomogram estimates postoperative urinary tract infection risk after upper urinary tract stone surgery with double-J stents

Ying Liu, Chao Zhou, ji ai, Zhenhao Li et autres

Postoperative urinary tract infection (UTI) is common after upper urinary tract stone surgery in patients with indwelling double-J stents, but dedicated risk-stratification tools for this peri-stent period remain limited. We aimed to develop and related-center validate a nomogram for individualized UTI risk …

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Renal cell carcinoma organoids for precision medicine: bridging the gap between models and patients

Jian Gao, Shiyu Wang, Chao Zhou, Zhenhao Li et autres

Renal cell carcinoma (RCC) poses significant challenges to precision oncology due to its pronounced molecular heterogeneity and complex tumor microenvironment (TME). Traditional two-dimensional (2D) cultures and animal models fall short in capturing patient-specific tumor biology, limiting their translational relevance. In contrast, three-dimensional …

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Renal epidermoid cyst mimicking renal tuberculous abscess: a case report

Jian Gao, Han Zhu, Zhengdao Liu, Mingzhou Li et autres

Renal epidermoid cysts (RECs) are exceedingly rare benign cystic lesions, with only 15 histologically confirmed cases reported worldwide to date. Due to their non-specific clinical and radiological features, they are often misdiagnosed preoperatively as infectious or neoplastic conditions. Here, we report a …

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Global Well-posedness of Hamilton-Jacobi Equations for Linear-Quadratic Mean Field Control Problems

Mengzhen Li, Chenchen Mou, Zhenhua Wu, Chao Zhou

Abstract In this manuscript, we investigate the global well-posedness of the Hamilton-Jacobi equation for linear-quadratic (LQ) mean field control problems with a common noise, along with the corresponding N -particle systems. The mean field control problems considered are not standard LQ mean …

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Electrical aging life assessment of magnesium oxide insulation in heating cables

Wanpeng Zhang, George Zhang, Chao Zhou, Bin Zhang et autres

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Effects of Postweld Heat Treatment on Interfacial Behavior and Mechanical Properties of Joints Welded with Cu/Ni-Cr Alloy

Wanpeng Zhang, Hang Xie, Xiaoquan Yu, George Zhang et autres

Welded cable composed of nickel–chromium (Ni-Cr) alloy and copper is a crucial component in the resistance heating technology used for heavy oil production. Tungsten inert gas (TIG) welding was employed to join the copper and Ni-Cr alloy using copper filler wire, and …

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Market-Making and Hedging with Market Impact using Deep Reinforcement Learning

Siu Hin Tang, Chao Zhou

We use a deep reinforcement learning framework with deep neural networks to approximate the optimal quoting and hedging strategies of a market maker taking into consideration the market friction. The framework can consider a wide range of inventory management and PnL distribution …

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Second order BSDEs with jumps by measurable selection argument

Laurent Denis, Anis Matoussi, Chao Zhou

International audience

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Microstructure and Characteristics of the Welded Joint between Ni-Cr Alloys and Copper

George Zhang, Wanpeng Zhang, Xiaoquan Yu, Hang Xie et autres

In the field of petroleum extraction, the welding technology of the core wire (the hybrid structure of copper and the Ni-Cr alloy) in high-power oilfield heaters is a key process that determines the efficiency of the heater. Using the tungsten inert gas …

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Asymptotically Tight Bounds on the Optimal Pricing Strategy with Patient Customers

Shuaijie Qian, Xizhi Su, Chao Zhou

In “Asymptotically Tight Bounds on the Optimal Pricing Strategy with Patient Customers,” Qian, Su, and Zhou revisit the problem of a monopolist seller’s optimal pricing strategy when dealing with both patient and impatient customers. The authors give asymptotically tight bounds on the …

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