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heat transfer analysis in peristaltic flow of MHD Jeffrey fluid with variable thermal conductivity

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Applied Mathematics and Mechanics(English Edition) 2015年第4期36卷 499-516页

作者： q.HUssAIN s.AsGHAR T.HAYAT A.ALsAEDI Department of Mathematics COMSATS Institute of Information Technology Nonlinear Analysis and Applied Mathematics (NAAM) Research Group Faculty of ScienceKing Abdul Aziz University Department of Mathematics Quaid-i-Azam University

The effect of an inclined magnetic field in the peristaltic flow of a Jeffrey fluid with variable thermal conductivity is discussed. The temperature dependent thermal conductivity of fluid in an asymmetric channel is taken into account. A dimensionless nonlinear system subject to a long wavelength and a low Reynolds number is solved. The explicit expressions of the stream function, the axial velocity, the pressure gradient, and the temperature are obtained. The effects of all physical parameters on peristaltic transport and heat transfer characteristics are observed from graphical illustrations. The behaviors of θ∈ [0, π/2] and θ∈ [π/2, π] on fluid flow and heat transfer are found to be opposite. Further, the size of trapped bolus is greater for the case of the inclined magnetic field （θ≠ π/2） than that for the case of the transverse magnetic field （θ = π/2）. The heat transfer coefficient decreases when the constant thermal conductivity （Newtonian） fluid is changed to the variable thermal conductivity （Jeffrey） fluid.

关键词： inclined magnetic field variable thermal conductivity Jeffrey fluid peri-staltic transport heat transfer

heat transfer in a porous saturated wavy channel with asymmetric convective boundary conditions

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Journal of Central south University 2015年第1期22卷 392-401页

作者： q.Hussain s.Asghar T.Hayat A.Alsaedi Department of Mathematics COMSATS Institute of Information Technology Department of Mathematics Faculty of Science King Abdulaziz University Department of Mathematics Quaid-I-Azam University 45320

The viscous flow in a wavy channel with convective boundary conditions is investigated. The channel is filled with a porous viscous fluid. Two cases of equal and different external convection coefficients on the walls are taken into account. Effect of viscous dissipation is also considered. The governing equations are derived employing long wavelength and low Reynolds number approximations. Exact closed form solutions are obtained for the simplified equations. Important physical features for peristaltic flow caused by the wavy wave are pumping, trapping and heat transfer rate at the channel walls. These are discussed one by one in depth and detail through graphical illustrations. special attention has been given to the effects of convective boundary conditions. The results show that for Bi1≠Bi2, there exists a critical value of Brinkman number Brc at which the temperatures of both the walls become equal. And, for Bi1>Bi2 and Br>Brc, the temperature of the cold wall exceeds the temperature of hot wall.

关键词： peristalsis heat transfer porous medium convective boundary conditions

Predictive performance of the variation rate of the driving pressure on the outcome of invasive mechanical ventilation in patients with acute respiratory distress syndrome

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Chinese Journal of Traumatology 2024年第2期27卷 107-113页

作者： Hui-Dan Jing Jun-Ying Tian Wei Li Bing-Ling he Hong-Chao Li Fu-Xia Jian Cui shang Feng shen Department of Intensive Care Unit The Affiliated Hospital of Guizhou Medical UniversityGuiyang 550004China Department of Intensive Care Unit Army Medical Center of PLAChongqing400042China College of Foreign Languges Chongqing Medical UniversityChongqing400016China

Purpose:To assess the value of the driving pressure variation rate(ΔP%)in predicting the outcome of weaning from invasive mechanical ventilation in patients with acute respiratory distress ***:In this case-control study,a total of 35 patients with moderate-severe acute respiratory distress syndrome were admitted to the intensive care unit between January 2022 and December 2022 and received invasive mechanical ventilation for at least 48 h were *** were divided into successful weaning group and failed weaning group depending on whether they could be removed from ventilator support within 14 *** measures including driving pressure,PaO2:FiO2,and positive end-expiratory pressure,*** assessed every 24 h from day 0 to day 14 until successful weaning was *** measurement data of non-normal distribution were presented as median(q1,q3),and the differences between groups were compared by Wilcoxon rank sum *** categorical data use the Chi-square test or Fisher's exact test to *** predictive value ofΔP%in predicting the outcome of weaning from the ventilator was analyzed using receiver operating characteristic ***:Of the total 35 patients included in the study,17 were successful vs.18 failed in weaning from a ventilator after 14 days of mechanical *** cut-off values of the medianΔP%measured by Operator 1 *** 2 in the first 4 days were≥4.17%and 4.55%,respectively(phe area under curve of 0.804(sensitivity of 88.2%,specificity of 64.7%)and 0.770(sensitivity of 88.2%,specificity of 64.7%),*** was a significant difference in mechanical ventilation duration between the successful weaning group and the failure weaning group(8(6,13)vs.12(7.5,17.3),p=0.043).The incidence of ventilator-associated pneumonia in the successful weaning group was significantly lower than in the failed weaning group(0.2‰vs.2.3‰,p=0.001).There was a significant difference noted between these

关键词： Driving pressure Driving pressure variation rate Acute respiratory distress syndrome Mechanical ventilation

The LIqUIDUs OF The TERNARY Ag-Cu-si ALLOY sYsTEM

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Acta Metallurgica sinica(English Letters) 1998年第5期11卷 325-328页

作者： Z.G.Liu X.M.Luo G.s.Guo C.X.he G.B.Li q.Y.Zhang Inst of Precious Metals Kunming China

The liquidus of the ternary Ag-Cd-si alloy system in the Ag-Cu rich region was determined by DTA. The ternary Ag-Cd-si system was divided into two ternary systems Ag-Cu-Cuo.76si0.24 and Ag-Cu0.76si0.24-si by the section of Ag-Cu0.76 *** is one ternary eutectic point for both the systems with the composition of 12. 5at. %Ag+71. 7at.%Cu+15.8at. %si and 30at.% Ag+44.7at.%Cu+25.3at.%sirespectivelg and the temperatures of the eutectic points are 740 and 705℃ respectively.

关键词： Ag-Cd-si ternary sytem liquidus

基于肠道菌群的帕金森病早期预测模型建立及生物信息分析

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中华疾病控制杂志 2024年第9期28卷 1096-1103页

作者：何长颖韦雨婷陈佳陆军军医大学军事预防医学系军队卫生统计学教研室重庆400038

目的探究基于肠道菌群对人群未来患帕金森症(parkinson′s disease,PD)的早期预测模型进行构建与评价,并对肠道菌群宏基因KO组进行功能分析,探讨PD的潜在治疗靶点。方法基于Zenodo数据库,一方面对肠道菌群相对丰度数据进行标准分数标准... 详细信息

目的探究基于肠道菌群对人群未来患帕金森症(parkinson′s disease,PD)的早期预测模型进行构建与评价,并对肠道菌群宏基因KO组进行功能分析,探讨PD的潜在治疗靶点。方法基于Zenodo数据库,一方面对肠道菌群相对丰度数据进行标准分数标准化及Zicoseq降维,采用基于自适应最小绝对收缩和选择算法(least absolute shrinkage and selection operator,LAssO)变量选择的logistic回归算法建立预测模型,使用受试者工作特征(receiver operating characteristic,ROC)曲线下面积(area under curve,AUC)和校准曲线评价模型预测效能,采用临床决策曲线(decision curve analysis,DCA)进行临床使用价值的评价;另一方面,对肠道菌群宏基因KO组数据使用limma包鉴定差异表达基因(differentially expressed genes,DEGs),对DEGs进行基因本体(gene ontology,GO)和京都基因与基因组百科全书(Kyoto encyclopedia of genes and genomes,KEGG)分析。通过结合蛋白质相互作用网络(protein-protein interaction networks,PPI)、支持向量机-递归特征消除(support vector machine-recursive feature elimination,sVM-RFE)和随机森林(random forest,RF)对DEGs进行筛选。结果基于自适应LAssO变量选择的logistic回归分析模型的ROC曲线以及校准曲线显示模型预测效果良好。DCA结果显示模型净收益较大。通过PPI网络分析及机器学习方法,最终筛选出6个核心DEGs,即阿拉伯糖转运系统渗透蛋白(L-arabinose operon q,araq)、甘油醛-3-磷酸脱氢酶,Ⅱ型、dCTP脱氨酶(dCTP deaminase,dcd)、颗粒19 kDa蛋白(signal recognition particle 19,sRP19)、加工前体5,核糖核酸酶P/MRP亚基(芽殖酵母)[processing of precursor 5,ribonuclease P/MRP subunit(***),POP5]、肌醇-3-磷酸合酶1(inositol-3-phosphate synthase 1,IsYNA1)。结论基于自适应LAssO变量选择的logistic回归分析模型对PD的预测具有优势,从而实现对PD患者的早发现、早干预、早治疗;相关核心基因的发现为PD的治疗提供科学指导和帮助。

关键词：帕金森病肠道菌群机器学习生物信息学分析

Effects of Current stressing on shear Properties of sn-3.8Ag-0.7Cu solder Joints

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Journal of Materials science & Technology 2010年第8期26卷 737-742页

作者： X.J. Wang q.L. Zeng q.s. Zhu Z.G. Wang J.K. shang shenyang National Laboratory for Materials science Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China Department of Materials science and Engineering University of Illinois at Urbana-Champaign Urbana IL 61801 USA

Effects of electromigration on microstructure, shear strength, and fracture behavior of solder joints were investigated by single-ball shear samples of eutectic sn-3.8Ag-0.7Cu （sAC） joined by Cu plates at two sides. The electromigration tests were conducted at a current density of about 1.1×10^3 A/cm2 and a working temperature of about 83℃. The results showed that the shear strength and flow stress decreased greatly after current stressing. such a decrease was associated with no significant loss of the fracture strain at short electromigration but a great reduction in the fracture strain after long-term current stressing. The variation of the fracture strain with the electromigration time was shown to result from the shift of the fracture surface from the center of the solder towards the intermetallic compound （IMC） interface at the cathode.

关键词： strength Fracture strain Voids solder

Naoxueshu Oral Liquid Accelerates Post-Craniotomy hematoma Absorption in Patients:An Open-Label,Multicenter,and Randomized Controlled Trial

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Chinese Journal of Integrative Medicine 2024年第8期30卷 675-683页

作者： he qiu LIN Fu-xin sU Jin-ye ZHUO Ling-yun ZHU qing sUN Xiao-chuan JIANG Rong-cai YAO Zhi-gang WANG Lei DANG Yan-wei LIU De-zhong LIU Yang FANG Wen-hua WANG Fang-yu LIN Yuan-xiang WANG An-xin WANG Deng-liang KANG De-zhi Department of Neurosurgery Neurosurgery Research InstituteThe First Affiliated Hospital of Fujian Medical UniversityFuzhou350004China Department of Neurosurgery Binhai Branch of National Regional Medical CenterThe First Affiliated HospitalFujian Medical UniversityFuzhou350209China Clinical Research and Translation Center The First Affiliated Hospital of Fujian Medical UniversityFuzhou350004China Fujian Clinical Research Center for Neurological Diseases The First Affiliated Hospital of Fujian Medical UniversityFuzhou350004China Fujian Provincial Institutes of Brain Disorders and Brain sciences The First Affiliated Hospital of Fujian Medical UniversityFuzhou350004China Department of Neurosurgery The Second Affiliated Hospital of Soochow UniversitySuzhouJiangsu Province215000China Department of Neurosurgery The First Affiliated Hospital of Chongqing Medical UniversityChongqing400000China Department of Neurosurgery Tianjin Medical University General HospitalTianjin300000China Department of Neurosurgery The Third Hospital of ShijiazhuangShijiazhuang050000China Department of Neurosurgery The First College of Clinical Medical ScienceChina Three Gorges UniversityYichangHubei Province443000China Department of Neurosurgery Yichang Central People’s HospitalYichangHubei Province443000China Department of Neurosurgery Xiangyang No.1 People’s Hospital Affiliated to Hubei University of MedicineXiangfanHubei Province441100China Department of Neurosurgery Zhoukou Central HospitalZhoukouHenan Province466000China Department of Neurosurgery The Third Hospital of MianyangMianyangSichuan Province621000China Department of Neurology Beijing Tiantan HospitalCapital Medical UniversityBeijing100000China China National Clinical Research Center for Neurological Diseases Beijing Tiantan HospitalCapital Medical UniversityBeijing100000China Department of Clinical Epidemiology and Clinical Trial Capital Medical UniversityBeijing100000China Beijing Municipal Key Laboratory of Clinical

Objective: To investigate whether Naoxueshu Oral Liquid(NXs) could promote hematoma absorption in post-craniotomy hematoma(PCH) patients. Methods: This is an open-label, multicenter, and randomized controlled trial conducted at 9 hospitals in China. Patients aged 18–80 years with post-craniotomy supratentorial hematoma volume ranging from 10 to 30 mL or post-craniotomy infratentorial hematoma volume less than 10 mL, or intraventricular hemorrhage following cranial surgery were enrolled. They were randomly assigned at a 1:1 ratio to the NXs(10 m L thrice daily for 15 days) or control groups using a randomization code table. standard medical care was administered in both groups. The primary outcome was the percentage reduction in hematoma volume from day 1 to day 15. The secondary outcomes included the percentage reduction in hematoma volume from day 1 to day 7, the absolute reduction in hematoma volume from day 1 to day 7 and 15, and the change in neurological function from day 1 to day 7 and 15. The safety was closely monitored throughout the study. Moreover, subgroup analysis was performed based on age, gender, history of diabetes, and etiology of intracerebral hemorrhage(ICH). Results: A total of 120 patients were enrolled and randomly assigned between March 30, 2018 and April 15, 2020. One patient was lost to follow-up in the control group. Finally, there were 119 patients(60 in the NXs group and 59 in the control group) included in the analysis. In the full analysis set(FAs) analysis, the NXs group had a greater percentage reduction in hematoma volume from day 1 to day 15 than the control group [median(q1, q3): 85%(71%, 97%) vs. 76%(53%, 93%), Phe secondary outcomes showed no statistical significance between two groups, either in FAs or per-protocol set(P>0.05). Furthermore, no adverse events were reported during the study. In the FAs analysis, the NXs group exhibited a higher percentage reduction in hematoma volume on day 15 in the following subgroups:

关键词： post-craniotomy hematoma Naoxueshu Oral Liquid hematoma absorption randomized controlled trial Chinese medicine

TheRMAL sTRUCTURAL DIsORDER AND MELTING TRANsITION IN HIGH-ANGLE GRAIN-BOUNDARY: A MOLECULAR-DYNAMICs sTUDY

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Acta Metallurgica sinica(English Letters) 1998年第5期11卷 365-375页

作者： s.J.Zhao Y.C.Wang J.q.You q.B.Yang L.G.Zhou H.q.Ye Xiangtan Univ Xiangtan China

A structural transition in the fcc ∑=5 (120)/[001] high-angle tilt grain-boundary(GB)is investigated by molecular-dynamics simulation. The calculations have been performed at various temperutures and the thermodynamic melting point Tm of the model system is determined by using a many-body potential fitted to copper. A thermal disorder transition in the GB region occurs well below the melting point. Our results indicate that such a transition is a continuous process and there is no evidence of premelting, which is entirely in accord with experiment results and theoretical *** we also observed that melting initiated at the interface and then propagated into the bulk quickly at or above Tm.

关键词： moleculandynamics grainboundary structural transition

支架特异性脂肪衰减指数与PCI术后靶血管血运重建相关

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国际医学放射学杂志 2024年第2期 251-252页

作者： F.Xu C.C.Wang q.Tao J.Zhang M.M.Zhao s.W.shi 潘红利

摘要目的探讨支架特异性血管周围脂肪衰减指数（FAI）在支架植入病人中的临床相关性。方法回顾性纳入162例在支架植入后接受连续冠状动脉CT血管成像

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