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Suture ligation for submucosal hemostasis during hand-sewn sideto-side duodeno-ileostomy in simultaneous pancreas and kidney transplantation

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World Journal of Gastrointestinal Surgery 2021年第9期13卷 988-999页

作者： Hui Wang Ying-Xin Fu Wen-Li Song chun-bai mo Gang Feng Jie Zhao Guang-Hui Pei Xiao-Feng Shi Zhen Wang Yu Cao Ye-Qi Nian Zhong-Yang Shen Department of Kidney and Pancreas Transplant Tianjin First Central HospitalSchool of MedicineNankai UniversityTianjin 300192China

BACKGROUND Enteric anastomotic(EA)bleeding is a potentially life-threatening surgical complication associated with enteric anastomosis during simultaneous pancreas and kidney transplantation(SPKT).AIM To investigate whether suture ligation(SL)for submucosal hemostasis during hand-sewn enteric anastomosis could decrease the morbidity of early EA bleeding in *** We compared the outcomes of 134 patients classified into SL(n=44)and no SL(NSL)groups(n=90).This study adheres to the declarations of Istanbul and Helsinki and all donors were neither paid nor *** During the first postoperative week,the EA bleeding rate in the SL group was lower than that in the NSL group(2.27%vs 15.56%;P=0.021);no relationship was found between EA bleeding and donor age,mean pancreatic cold ischemia time,platelet count,prothrombin time international normalized rate,activated partial thromboplastin time,and thrombin *** leakage was observed in one case in the SL group at postoperative day(POD)14 and in one case at POD 16 in the NSL group(P=0.754).No significant difference was found between the two groups in the patient survival,pancreas graft survival,or kidney graft *** SL for submucosal hemostasis during hand-sewn enteric anastomosis in SPKT can decrease the morbidity of early EA bleeding without increasing the anastomotic leakage rate.

关键词： Anastomosis Gastrointestinal bleeding Hemostasis Ligation Pancreas Transplantation

Ideal Bi‑Based Hybrid Anode Material for Ultrafast Charging of Sodium‑Ion Batteries at Extremely Low Temperatures

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Nano-Micro Letters 2025年第3期17卷 152-167页

作者： Jie bai Jian Hui Jia Yu Wang chun Cheng Yang Qing Jiang Key Laboratory of Automobile Materials(Jilin University) Ministry of EducationSchool of Materials Science and EngineeringJilin UniversityChangchun 130022People’s Republic of China

Sodium-ion batteries have emerged as competitive substitutes for low-temperature applications due to severe capacity loss and safety concerns of lithium-ion batteries at−20°C or ***,the key capability of ultrafast charging at ultralow temperature for SIBs is rarely ***,a hybrid of Bi nanoparticles embedded in carbon nanorods is demonstrated as an ideal material to address this issue,which is synthesized via a high temperature shock *** a hybrid shows an unprecedented rate performance(237.9 mAh g^(−1)at 2 A g^(−1))at−60℃,outperforming all reported SIB anode *** with a Na_(3)V_(2)(PO_(4))_(3)cathode,the energy density of the full cell can reach to 181.9 Wh kg^(−1)at−40°*** on this work,a novel strategy of high-rate activation is proposed to enhance performances of Bi-based materials in cryogenic conditions by creating new active sites for interfacial reaction under large current.

关键词： Bi nanoparticles High temperature shock High-rate activation Ultrafast charging Low-temperature sodium-ion batteries

异丙肾上腺素预处理对大鼠胰腺移植后缺血再灌注损伤的抑制作用

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世界华人消化杂志 2010年第9期18卷 871-876页

作者：裴广辉梁健宋文利王智平莫春柏天津市第一中心医院移植外科天津市300192 中国医科大学附属第四医院肝胆胰外科辽宁省沈阳市110032

目的:探讨减轻大鼠胰腺移植后缺血再灌注损伤的保护作用机制.方法:IPC后动态检测大鼠胰腺组织热休克蛋白表达.建立大鼠胰腺移植缺血再灌注模型,选择表达热休克蛋白高峰时段供体大鼠胰腺移植作为实验组,未预处理供体大鼠胰腺移植作为对照... 详细信息

目的:探讨减轻大鼠胰腺移植后缺血再灌注损伤的保护作用机制.方法:IPC后动态检测大鼠胰腺组织热休克蛋白表达.建立大鼠胰腺移植缺血再灌注模型,选择表达热休克蛋白高峰时段供体大鼠胰腺移植作为实验组,未预处理供体大鼠胰腺移植作为对照组.移植后6h,采集静脉血及移植胰腺.热休克蛋白70(HSP70)分别用Westernblot法及免疫组织化学法检测.免疫组织化学法测定肿瘤坏死因子-α(TNF-α)表达.流式细胞仪检测胰腺细胞凋亡率.碘淀粉比色法检测血淀粉酶水平.结果:IPC后供体大鼠胰腺中HSP70的表达在24h达到高峰,与其他各时段比较具有显著差异(0.92±0.25vs0.24±0.04,0.34±0.06,0.58±0.07,0.62±0.11,0.25±0.09,均P0.05).HSP70主要表达于胰腺腺泡细胞及血管壁.对照组胰腺组织中TNF-α、细胞凋亡率、中性粒细胞、血淀粉酶的水平明显升高,与假手术组相比差异显著(均P<0.01).实验组降低了胰腺组织中TNF-α、细胞凋亡率、白细胞数、血淀粉酶的水平,与对照组比较差异具有统计学意义(11929±1220vs46111±3127,26.7%±4.5%vs37.4%±4.7%,3308±531vs6668±1506,1057IU/L±148IU/Lvs1408IU/L±195IU/L,均P<0.05).结论:IPC减轻了大鼠胰腺移植后缺血再灌注损伤,IPC保护作用与HSP70的诱导生成有关.

关键词：异丙肾上腺素预处理胰腺移植缺血再灌注损伤热休克蛋白70

Comprehensive modeling strategy for thermomechanical tribological behavior analysis of railway vehicle disc brake system

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Friction 2024年第1期12卷 74-94页

作者： Jiabao YIN chun LU Jiliang mo School of Mechanical Engineering Southwest Jiaotong UniversityChengdu 610031China Technology and Equipment of Rail Transit Operation and Maintenance Key Laboratory of Sichuan Province Chengdu 610031China

A comprehensive modeling strategy for studying the thermomechanical tribological behaviors is proposed in this *** wear degradation considering the influence of temperature(T)is predicted by Archard wear model with the help of the UMESHmoTION subroutine and arbitrary Lagrangian–Eulerian(ALE)remeshing *** the proposed method,the thermomechanical tribological behaviors of railway vehicle disc brake system composed of forged steel brake disc and Cu-based powder metallurgy(PM)friction block are studied *** effectiveness of the proposed methodology is validated by experimental test on a self-designed scaled brake test bench from the perspectives of interface temperature,wear degradation,friction noise and vibration,and contact status *** work can provide an effective way for the investigation of thermomechanical tribological behaviors in the engineering field.

关键词： tribological behaviors thermomechanical field wear prediction finite element simulation disc brake system railway vehicle

Effect of stress-relief annealing on thermal fatigue cracks for die-casting die steels

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Journal of Iron and Steel Research International 2024年第5期31卷 1164-1176页

作者： Zhi-xiong bai Xiao-chun Wu School of Materials Science and Engineering Shanghai UniversityShanghai200444China

The effect of stress-relief annealing at different stages of thermal fatigue tests on crack growth was investigated using a self-built thermal cycle *** results showed that annealing could limit crack expansion *** reduced dislocation density and released the accumulation of residual *** addition,the strain accumulation in carbides was reduced by this *** was also found that double annealing was even more effective at inhibiting crack expansion compared to single stress-relief *** 1000 cycles,the maximum crack length was reduced by 31.1%and 45.2%for the samples after using the optimal single and double annealing processes,*** single stress-relief annealing,earlier annealing provides more benefit in delaying crack ***,effective double stress-relief annealing requires a suitable time interval between the annealing ***,after 800 cycles,surface hardness decreased significantly accompanied by an increase in the size and number of carbides,and cracks expanded predominantly along grain boundaries.

关键词： Thermal fatigue Steel Carbide Stress-relief annealing Dislocation Residual stress

Statistical Measure for Risk-seeking Stochastic Wind Power Offering Strategies in Electricity Markets

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Journal of modern Power Systems and Clean Energy 2022年第5期10卷 1437-1442页

作者： Dongliang Xiao Haoyong Chen chun Wei Xiaoqing bai School of Electric Power South China University of TechnologyGuangzhou 510641China College of Information Engineering Zhejiang University of TechnologyHangzhouChina School of Electrical Engineering Guangxi UniversityNanningChina

This study proposes a statistical measure and a stochastic optimization model for generating risk-seeking wind power offering strategies in electricity markets. Inspired by the value at risk(VaR) to quantify risks in the worst-case scenarios of a profit distribution, a statistical measure is proposed to quantify potential high profits in the best-case scenarios of a profit distribution,which is referred to as value at best(VaB)in the best-case scenarios. Then, a stochastic optimization model based on VaB is developed for a risk-seeking wind power producer, which is formulated as a mixed-integer linear programming problem. By adjusting the parameters in the proposed model, the wind power producer can flexibly manage the potential high profits in the best-case scenarios from the probabilistic perspective. Finally, the proposed statistical measure and riskseeking stochastic optimization model are verified through case studies.

关键词： Electricity market risk-seeking statistical measure stochastic optimization wind power

Experimental research on nonlinear characteristics of natural convection in a 3-D shallow cavity

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Science China(Technological Sciences) 2011年第12期54卷 3304-3310页

作者： ZHAN NaiYan GAO Qing bai Li YANG mo College of Automotive Engineering Jilin University Changchun 130022 China Scool of Municipal and Environmental Engineering Jilin Institute of Architectural and Civil Engineering Changchun 130021 China College of Power Engineering University of Shanghai for Science and Technology Shanghai 200093 China

Experiments were conducted to study the temperature field,flow field,3-D characteristics and self-sustained oscillation of the natural air convection in a 3-D shallow cavity which was heated from underneath. The experiments were conducted by the methods of laser holographic interferometry photography and smoke visualization. To ensure the temperature of both plates to be constant and the accuracy of laser interferometer,the instrument was calibrated and error has was analyzed. The results showed that the flow field was stable at lower Rayleigh numbers. When the Rayleigh number increased,the flow field became instable and the isotherms distorted. The rolls merged at Ra=12500 and formed along both axes when Ra was over 18500. The air rose from the middle and descended in the circumference while the flow field and heat transfer converted to 3-D characteristic from 2-D characteristic. When the Rayleigh number increased,the flow field became more instable. The rolls became irregular and time dependent when Ra≥Rac(=30500) ,which is nonlinear. When lateral walls were heated or cooled,the rolls merged along the long axis and two rolls formed along the short axis. Three rolls formed occasionally in the process.

关键词： interferometric tomography smoke visualization critical Rayleigh number 3-D characteristic oscillation and chaos

From atomistic modeling to materials design:computation-driven material development in lithium-ion batteries

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Science China Chemistry 2024年第1期67卷 276-290页

作者： Xiangrong Li Xiang Chen Qiang bai Yifei mo Yizhou Zhu Research Center for Industries of the Future and School of Engineering Westlake UniversityHangzhou 310030China Department of Chemical Engineering Tsinghua UniversityBeijing 100084China College of Materials Science and Engineering Taiyuan University of TechnologyTaiyuan 030024China Department of Materials Science and Engineering University of MarylandCollege Park 20742United States

As an advanced energy storage system,lithium-ion batteries play an essential role in modern *** their ubiquitous success,there is a great demand for continuous improvements of the battery performance,including higher energy density,lower safety risk,longer cycling life,and lower *** performance improvement requires the design and development of novel electrode and electrolyte materials that exhibit desirable properties and satisfy strict *** modeling can provide a unique perspective to fundamentally understand and rationally design battery *** this paper,we review a few recent successful examples of computation-driven discovery and design in electrode and electrolyte ***,we highlight how atomistic modeling can reveal the underlying mechanisms,predict the important properties,and guide the design and engineering of electrode and electrolyte *** have a conclusion with a discussion of the unique capability of atomistic modeling in battery material development and provide a perspective on future challenges and directions for computation-driven battery material developments.

关键词： materials design computation modeling batteries electrolyte electrode

The Pos/neg-weighted 2-medians in Balanced Trees with Subtree-shaped Customers

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Acta Mathematicae Applicatae Sinica 2016年第4期32卷 891-898页

作者： chun-song bai Li-ying KANG Department of Mathematics Fuyang Normal College Department of Mathematics Shanghai University

This paper deals with the pos/neg-weighted p-median problem on tree graphs where all customers are modeled as subtrees. We present a polynomial algorithm for the 2-median problem on an arbitrary tree. Then we improve the time complexity to O（n logn） for the problem on a balanced tree, where n is the number of the vertices in the tree.

关键词： Location problems subtree-shaped customers obnoxious facilities