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Fibrin gel-assisted stone extraction in retrograde intrarenal surgery

BJU INTERNATIONAL 2022年第2期129卷 170-173页

作者： Yu, Yue Xi, Haibo chen, Yujun Li, xuwen Liu, Wei Hu, Jieping Deng, Jun Liu, Xiaoqiang Lin, Longhui Li, chen Wang, Mengzhen Fu, Bin Wang, Gongxian Kuang, Renrui Zhou, Xiaochen Nanchang Univ Affiliated Hosp 1 Dept Urol Nanchang Jiangxi Peoples R China

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The Pararectus approach in acetabular fractures treatment: functional and radiologcial results

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BMC MUSCULOSKELETAL DISORDERS 2022年第1期23卷 370-370页

作者： Liu, Guoming chen, Jinli Liang, chengzhi Zhang, chengdong Li, xuwen Hu, Yanling Qingdao Univ Dept Orthoped Affiliated Hosp Qingdao 266003 Shandong Peoples R China

Background The surgical treatment of complex acetabular fractures is one of the most challenging procedures for orthopedic surgeons. The Pararectus approach, as a reasonable alternative to the existing surgical procedures, was performed for the treatment of acetabular fractures involving the anterior column. This study aimed to evaluate outcome using the Pararectus approach for acetabular fractures involving anterior columns. Methods Thirty-seven with displaced acetabular fractures involving anterior columns were treated between July 2016 and October 2019 using the Pararectus approach. The functional outcomes (using the Merle d Aubigne and Postel scoring system, WOMAC and modified Harris scoring), the quality of surgical reduction (using the Matta criteria), and postoperative complications were assessed during approximately 26 months follow-up period. Results Thirty-seven patients (mean age 53 years, range: 30-71;28 male) underwent surgery. Mean intraoperative blood loss was 840 ml (rang: 400-2000 ml) and mean operating time was 210 min (rang: 140-500 min). The modified Merle d Aubigne score was excellent and good in 27 cases (73%), fair in 6 cases (16%), and poor in 3 cases (11%). The mean score was 88.5 (range:77-96) for the modified Harris Hip scores, and 22 (range:7-35) for the WOMAC scores after operation. Postoperative functional outcomes were significantly improved compared with preoperative outcomes (P < 0.0001). The quality of reduction was anatomical in 21 cases (57%), satisfactory in 9 cases (24%), and unsatisfactory in 7 cases (19%). At follow-up, four patients developed a DVT, and heterotopic bone formation was observed in one patient. The hip osteoarthritis was not observed. Conclusion The Pararectus approach achieved good functional outcomes and anatomical reduction in the treatment of acetabular fractures involving anterior column with minimal access morbidity.

关键词： Acetabular fracture Pararectus approach Surgical exposure Outcome Radiological results

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Submarine Continental Slopes Stability Prediction of Natural Gas HydratesBased on Machine Learning

Submarine Continental Slopes Stability Prediction of Natural...

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Offshore Technology Conference, OTC 2025

作者： chen, Yu He, Yufa Wang, Yixuan Zhou, Yunjian Fu, Qiang Qin, xuwen Liu, Dingyuan Tian, Zheng Zhang, Kexin CNOOC Research Institute Ltd State Key Laboratory of Offshore Natural Gas Hydrates Beijing China Huairou Laboratory Beijing China China Aero Geophysical Survey and Remote Sensing Center for Natural Resources Beijing China

ISBN: (纸本)9781959025610

In the process of extracting naturally-occurring oceanic gas hydrates, the dissociation of hydrates can causea reduction in soil strength. This reduction has the potential to trigger slope failure and submarine landslides,which present a catastrophic threat to offshore facilities and hydrate production. This research aims to create a robust and accurate machine-learning model that can efficiently predict stability of submarine continental slopes where gas hydrates are widespread. By collecting and analyzing 144 relevant cases, a comprehensive dataset was constructed, incorporating slope basic data, overlying and underlying layer data, and geological parameters of the hydrate layer. After conducting a correlation coefficient analysis between the characteristic parameters of the dataset and the output, the key characteristic parameters were determined. To model the dataset and assess its performance, four machine learning techniques were employed: Random Forest(RF), XGBoost, K-Nearest Neighbors (KNN), and Support Vector Machine (SVM). Formation physical parameters, geotechnical parameters, and NGH parameters were taken as input parameters, and the stability of NGH slopes was taken as prediction indicator. Evaluation metrics such as the ROC and confusion matrix were employed to comprehensively evaluate these models’ classification ability. Among these algorithms,the RF algorithm achieves the best prediction accuracy and AUC value, demonstrating its potential in submarine continental slopes stability prediction of natural gas hydrates. Additionally, sensitive analysis using Gini impurity calculations revealed that hydrate decomposition degree is the most significant factor affecting slope stability, followed by the burial depth and thickness of the hydrate layer. The slope angle,cohesion, and internal friction angle also have significant impacts. This study provides a new perspective for predicting submarine continental slopes stability with NGH and offers a scientific

关键词： Landslides

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考虑齿轮啮合的某舰炮随动系统动力学特性分析研究

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振动与冲击 2023年第20期42卷 293-299页

作者：陈宇谢明亮景旭文邹晓峰刘金锋闫德俊江苏科技大学机械工程学院江苏镇江212100 中船黄埔文冲船舶有限公司广东省舰船先进焊接技术企业重点实验室广州510720

为研究齿轮间接触碰撞及啮合间隙等对舰炮随动系统性能及振动特性的影响,建立了考虑齿轮啮合、随动系统等多非线性因素的舰炮机电液耦合动力学模型。其中,基于改进的Lankarani-Nikravesh接触算法及齿轮间时变啮合刚度计算方法,建立了考... 详细信息

为研究齿轮间接触碰撞及啮合间隙等对舰炮随动系统性能及振动特性的影响,建立了考虑齿轮啮合、随动系统等多非线性因素的舰炮机电液耦合动力学模型。其中,基于改进的Lankarani-Nikravesh接触算法及齿轮间时变啮合刚度计算方法,建立了考虑时变啮合刚度的齿轮传动多体接触动力学模型。数值计算结果表明,随动系统中齿轮啮合会使舰炮的振动频率变高,降低随动系统的控制性能,但比例积分微分(proportional-integral-derivative,PID)控制器可在一定程度上抑制齿轮间接触非线性的不利影响。该研究可为舰炮炮控性能的预测和优化提高提供参考。

关键词：舰炮随动系统齿轮啮合间隙接触动力学仿真

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Focusing Quantum Many-body Dynamics: The Rigorous Derivation of the 1D Focusing Cubic Nonlinear Schrodinger Equation

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ARCHIVE FOR RATIONAL MECHANICS AND ANALYSIS 2016年第2期221卷 631-676页

作者： chen, xuwen Holmer, Justin Univ Rochester Dept Math Hylan Bldg Rochester NY 14627 USA Brown Univ Dept Math 151 Thayer St Providence RI 02912 USA

We consider the dynamics of N bosons in 1D. We assume that the pair interaction is attractive and given by N beta-1V(N-beta.) where integral V infinity limit of the N-body dynamic and hence justify the mean-field lim... 详细信息

We consider the dynamics of N bosons in 1D. We assume that the pair interaction is attractive and given by N beta-1V(N-beta.) where integral V <= 0. We develop new techniques in treating the N-body Hamiltonian so that we overcome the difficulties generated by the attractive interaction and establish new energy estimates. We also prove the optimal 1D collapsing estimate which reduces the regularity requirement in the uniqueness argument by half a derivative. We derive rigorously the 1D focusing cubic NLS with a quadratic trap as the N -> infinity limit of the N-body dynamic and hence justify the mean-field limit and prove the propagation of chaos for the focusing quantum many-body system.

关键词： Quantum theory Schrödinger equation Many-body problem Bosons Hamiltonian systems

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Code Conversion Method on Process-in-Memory Platform 3

Code Conversion Method on Process-in-Memory Platform

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3rd International Conference on Applied Mathematics, Modeling and Simulation (AMMS)

作者： Liu, Jinhui Zhao, chen Du, Fangzhou Liu, xuwen Xidian Univ Dept Comp Sci & Technol Xian 710126 Shaanxi Peoples R China

Process-in-Memory (PIM) has become a favorable solution for data intensive applications with its advantages of placing processing units in or near memory, reducing the movement of data between memory and processing unit. However, most recent PIM platforms have relatively large limitations in terms of computing flexibility and types of computing, and programming is complicated, which cannot provide a unified programming framework. Therefore, it becomes a challenge to deploy the code to the hardware, which severely restricts the application development on the PIM platform. This paper presents a method of code conversion based on the PIM platform, which allows users to develop applications on the PIM platform with the high-level programming language, makes the PIM platform more accessible in the development of data intensive applications.

关键词： PIM code conversion method NNs Algorithm library

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Emerging roles and therapeutic implications of lipid droplet protein perilipin 2 in liver disease

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Genes & Diseases 2025年

作者： xuwen Xiang Jing chen Lin Che Department of Child Health Department of Pediatrics Women and Children's Hospital School of Medicine Xiamen University Xiamen Fujian 361003 China State Key Laboratory of Oncology in South China Guangdong Provincial Clinical Research Center for Cancer Sun Yat-sen University Cancer Center Guangzhou Guangdong 510060 China

Lipid droplets (LDs) are dynamic organelles that store neutral lipids when energy is in excess and serve as an energy reservoir during energy deprivation. Altered hepatic lipid metabolism is a critical factor influencing the development of liver disease, such as viral hepatitis, fatty liver disease, and hepatocellular carcinoma. Perilipin 2 (PLIN2) is a protein associated with the metabolism of intracellular LDs and is closely related to the clinical outcome of liver disease. While the impact of PLIN2 on the pathogenesis of liver disease is gradually being recognized, the mechanism of action remains unclear. In this review, we highlight recent advances in the understanding of PLIN2's role in the pathogenesis of liver disease through LD biogenesis, LD contact sites, LD dynamics, and lipophagy. Furthermore, we discuss the current opportunities for PLIN2-targeted therapy for liver disease.

关键词： Lipid droplets Liver disease Perilipin 2 Small molecular inhibitors Therapeutic target

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Advanced treatment of phosphorus-containing tail water by Fe-Mg-Zr layered double hydroxide beads: Performance and mechanism

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JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021年 296卷 113203-113203页

作者： Zhang, Yangzhong Qin, Jiafu Wang, Xiaojun chen, Zhenguo Zheng, xuwen chen, Yongxing South China Univ Technol Sch Environm & Energy Guangzhou 510006 Peoples R China South China Univ Technol Sch Chem & Chem Engn Guangzhou 510006 Peoples R China

The adsorption process for low concentration phosphorus wastewater treatment has advantages of simple convenience, stable performance and less sludge, while most of current adsorbents fail to be separated for reuse. Meanwhile, few people pay attention to the removal of low concentration phosphorus from tail water by adsorbents. In this study, a newly efficient Fe-Mg-Zr layered double hydroxide beads were prepared by simple insitu crosslinking method and applied for low concentration phosphorus adsorption from real tail water. The maximum adsorption capacity of Fe-Mg-Zr beads was 21.61 mg/g, showing more practical application value for phosphorus removal. Fixed bed experiments showed that 5.0 g adsorbent could removed 2.12 mg phosphorus from tail wastewater containing 1.03 mg/L phosphorus. The beads adsorbent can be reused with excellent adsorption performance even after five cycles of adsorption-desorption operation. After detailed analyses, it was found that ligand exchange and ion exchange were the dominant mechanisms for phosphorus adsorption by this beads. Overall, the material has the advantages of simple preparation, good adsorption performance, easy separation and recycle, indicating a great potential for low concentration phosphorus wastewater treatment.

关键词： Fe-Mg-Zr beads Adsorption Phosphorus-containing tail water Recycling

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Correlation Structures, Many-Body Scattering Processes, and the Derivation of the Gross-Pitaevskii Hierarchy

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INTERNATIONAL MATHEMATICS RESEARCH NOTICES 2016年第10期2016卷 3051-3110页

作者： chen, xuwen Holmer, Justin Univ Rochester Dept Math Hylan Bldg Rochester NY 14627 USA Brown Univ Dept Math 151 Thayer St Providence RI 02912 USA

We consider the dynamics of N bosons in three dimensions. We assume that the pair interaction is given by N3 beta-1V(N-beta center dot). By studying an associated many-body wave operator, we introduce a Bogoliubov-Born-Green-Kirkwood-Yvon (BBGKY) hierarchy which takes into account all of the interparticle singular correlation structures developed by the many-body evolution from the beginning. Assuming energy conditions on the N-body wave function, for beta is an element of (0, 1], we derive the Gross-Pitaevskii hierarchy with 2-body interaction. In particular, we establish that, in the N ->infinity limit, all k-body scattering processes vanish if k >= 3 and thus provide a direct answer to a question raised by Erdos et al. [30]. Moreover, this new BBGKY hierarchy shares the limit points with the ordinary BBGKY hierarchy strongly for beta is an element of (0, 1) and weakly for beta = 1. Since this new BBGKY hierarchy converts the problem from a two-body estimate to a weaker three-body estimate for which we have the estimates to achieve beta < 1, it then allows us to prove that all limit points of the ordinary BBGKY hierarchy satisfy the space-time bound conjectured by Klainerman and Machedon [48] for beta is an element of (0, 1).

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High-performance carbon-electrode-based self-powered optoelectronic synaptic devices

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Science China(Information Sciences) 2024年第5期67卷 339-340页

作者： Wen HUANG xuwen XIA Huixing ZHANG Tenglong GUO Pengjie HANG Bin LI Jiawei TANG Biao LI chen ZHU Lei WANG Deren YANG Xuegong YU Xing'ao LI Jiangsu Provincial Engineering Research Center of Low Dimensional Physics and New Energy & School of Science Nanjing University of Posts and Telecommunications College of Integrated Circuit Science and Engineering Nanjing University of Posts and Telecommunications State Key Laboratory of Silicon and Advanced Semiconductor Materials Zhejiang University

A two-terminal self-powered optoelectronic structure could mimic synaptic functions of a human brain synapse unit(Figure 1(a)) based on the photovoltaic effects [1], demonstrating the potential for decreasing energy consumption for future computing. However, current self-powered optoelectronic synaptic devices face issues of stability and cost,which mainly arise from noble metal electrodes and independent hole transport layers used in these structures. Substituting low-cost carbon for these metal electrodes and carrier transport layers may promise to solve these challenges.

关键词： electrode devices carbon high based optoelectronic performance self-powered synaptic

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