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Severity of acute gastrointestinal injury grade is a good predictor of mortality in critically ill patients with acute pancreatitis

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World Journal of Gastroenterology 2020年第5期26卷 514-523页

作者： Ling Ding Hong-Yan chen Jin-Yun Wang Hui-Fang Xiong Wen-hua He Liang Xia Nong-hua Lu Yin Zhu Department of Gastroenterology The First Affiliated Hospital of Nanchang University

BACKGROUND Gastrointestinal(GI)dysfunction is a common and important complication of acute pancreatitis(AP),especially in patients with severe *** this,there is no consensus means of obtaining a precise assessment of GI *** To determine the association between acute gastrointestinal injury(AGI)grade and clinical outcomes in critically ill patients with *** Patients with AP admitted to our pancreatic intensive care unit from May 2017 to May 2019 were *** function was assessed according to the AGI grade proposed by the European Society of Intensive Care Medicine in 2012,which is mainly based on GI symptoms,intra-abdominal pressure,and feeding intolerance in the first week of admission to the intensive care *** logistic regression analysis was performed to assess the association between AGI grade and clinical outcomes in critically ill patients with *** Among the 286 patients included,the distribution of patients with various AGI grades was 34.62%with grade I,22.03%with grade II,32.52%with grade III,and 10.84%with grade *** distribution of mortality was 0%among those with grade I,6.35%among those with grade II,30.11%among those with grade III,and 61.29%among those with grade IV,and AGI grade was positively correlated with mortality(χ2=31.511,P<0.0001).Multivariate logistic regression analysis showed that age,serum calcium level,AGI grade,persistent renal failure,and persistent circulatory failure were independently associated with *** with the Acute Physiology and Chronic Health Evaluation II score(area under the curve:0.739 vs 0.854;P<0.05)and Ranson score(area under the curve:0.72 vs 0.854;P<0.01),the AGI grade was more useful for predicting *** AGI grade is useful for identifying the severity of GI dysfunction and can be used as a predictor of mortality in critically ill patients with AP.

关键词： Acute pancreatitis Gastrointestinal dysfunction Acute gastrointestinal injury Mortality Predictive factor Critically ill

Effects of hypokalemia on transmural dispersion of ventricular repolarization in left ventricular myocardium

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Asian Pacific Journal of Tropical Medicine 2013年第6期6卷 485-488页

作者： Jiang-hua Zhong Shi-Juan Lu Mo-Shui chen Zi-Bin chen Liu Wang Ping-Sheng Wu Department of Cardiology Affiliated South Hospital of South Medical University Department of Cardiology Haikou People's Hospital

Objective:To observe effects of hypokalemia on transmural heterogeneity of ventricular repolarization in left ventricular myocardium of rabbit,and explore the role of hypokalemia in malignant ventricular arrhythmia（MVA）.Methods:A total of 20 rabbits were randomly divided into control group and hypokalemic *** hearts in the control group were simply perfused with modified Tyrode’s solution,and were perfused with hypokalemic Tyrode’s solution in hypokalemic *** fibrillation threshold（VFT）,90%monophasic action potential repolarization duration(APD90) of subepicardial,midmyocardial and subendocardial myocardium,transmural dispersion of repolarization（TDR） and Cx43 protein expression in three layers of myocardium were measured in both ***:VFT in the control group and the hypokalemic group were（13.40±2.95） V,and（7.00±1.49） V,*** was a significant difference between two groups（P90 of three myocardial layers in the hypokalemic group were significantly prolonged than those in the control group（/’90in the hypokalemic group and the control group were（38.10±10\29） ms and（23.7015.68） ms,and TDR were（52.90r 14.55） ms and（36.10±12.44） ms,respectively.△APD90 and TDR in the hypokalemic group were significantly higher than those in the control group(P90 of midmyocardium was more significant in the hypokalemic ***43 protein expression of all three myocardial layers were decreased significantly in the hypokalemic group（P90 was significantly increased {P<0.05).Reduction of Cx43 protein expression was more significant in the ***:Hypokalemic can increase transmural heterogeneity of Cx43 expression and repolarization in left ventricular myocardium of rabbit,and decrease VFT and can induce MVA more easily.

关键词： Hypokalemia Gap junction Repolarization heterogeneity Midmyocardium

Damage of multi-layer spaced metallic target plates impacted by radial layered PELE

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Defence Technology（防务技术） 2020年第1期16卷 201-207页

作者： Chun cheng Zhong-hua Du Xi chen Li-zhi Xu cheng-xin Du Ji-long Han Xiao-dong Wang School of Mechanical Engineering Nanjing University of Science and TechnologyNanjing210094China

Three different kinds of PELE(the penetrator with lateral efficiency) were launched by ballistic artillery to impact the multi-layer spaced metal target *** lmpact velocities of the projectiles were measured by the velocity measuring *** damage degree and process of each laye r of target plate impacted by the three kinds of projectiles were *** experimental results show that all the three kinds of projectiles have the effect of expanding holes on the multi-layer spaced metal target *** the normal structure PELE(without layered) with tungsten alloy jacket and the radial layered PELE with tungsten alloy jacket,the diameters of holes on the seco nd layer of plates are 3.36 times and 3.76 times of the diameter of the projectile,re *** radial layered PELE with W/Zr-based amorphous composite jacket,due to the large number of tungsten wires dispersed after the impact,the diameter of the holes on the four-layer spaced plates can reach 2.4 times,3.04 times,5.36 times and 2.68 times of the diameter of the ***,the normal structure PELE with tungsten alloy jacket and the radial layered PELE whit tungsten alloy jacket formed a large number of fragments impact marks on the third target *** the number of fragments penetrating the third target plate is not as large as that of the normal structure PELE,the area of dispersion of fragments impact craters on the third target plate is larger by the radial layered *** radial layered PELE with W/Zr-based amorphous composite jacket released a lot of heat energy due to the impact of the matrix material,and formed a large area of ablation marks on the last three target plates.

关键词： PELE(the penetrator with lateral efficiency) Multi-layer spaced metal target plates Impact Damage

Boosting the water gas shift reaction on Pt/CeO_(2)-based nanocatalysts by compositional modification: Support doping versus bimetallic alloying

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Journal of Energy Chemistry 2022年第4期31卷 241-249页

作者： Kun Yuan Xiao-chen Sun Hai-Jing Yin Liang Zhou Hai-Chao Liu Chun-hua Yan Ya-Wen Zhang Beijing National Laboratory for Molecular Sciences(BNLMS) State Key Laboratory of Rare Earth Materials Chemistry and ApplicationsPKU-HKU Joint Laboratory in Rare Earth Materials and Bioinorganic ChemistryCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China Beijing National Laboratory for Molecular Sciences(BNLMS) State Key Laboratory for Structural Chemistry of Stable and Unstable SpeciesCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China

The water gas shift reaction is of vital significance for the generation and transition of energy due to the application in hydrogen production and industries such as ammonia synthesis and fuel *** influence of support doping and bimetallic alloying on the catalytic performance of Pt/Ce O_(2)-based nanocatalysts in water gas shift reaction was reported in this *** lanthanide ions and 3d transition metals were respectively introduced into the Ce O_(2)support or Pt to form Pt/Ce O_(2):Ln(Ln=La,Nd,Gd,Tb,Yb)and Pt M/Ce O_(2)(M=Fe,Co,Ni)*** sample of Pt/Ce O_(2):Tb showed the highest activity(TOF at 200℃=0.051 s^(-1))among the Pt/Ce O_(2):Ln and the undoped Pt/Ce O_(2)***,the sample of Pt Fe/Ce O_(2)exhibited the highest activity(TOF at 200℃=0.12 s^(-1))among Pt M/Ce O_(2)*** results of the multiple characterizations indicated that the catalytic activity of Pt/Ce O_(2):Ln catalysts was closely correlated with the amount of oxygen vacancies in doped ceria ***,the different activity of Pt M/Ce O_(2)bimetallic catalysts was owing to the various Pt oxidation states of the bimetals dispersed on *** study of the reaction pathway indicated that both the samples of Pt/Ce O_(2)and Pt/Ce O_(2):Tb catalyzed the reaction through the formate pathway,and the enhanced activity of the latter derived from the increased concentration of oxygen vacancies along with promoted water *** for the sample of Pt Fe/Ce O_(2),its catalytic mechanism was the carboxyl route with a higher reaction rate due to the moderate valence of Pt along with improved CO activation.

关键词： Pt/CeO_(2)catalysts Water–gas shift reaction Support doping Bimetallic alloying

关节镜下双后内侧入路关节外囊壁切除术治疗腘窝囊肿的临床研究

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临床外科杂志 2024年第6期32卷 648-652页

作者：王佳琪赵柏铭王华杨旭陈廖斌武汉大学中南医院关节与运动医学科 430071

目的探讨关节镜下双后内侧入路关节外囊壁切除术治疗腘窝囊肿的临床疗效。方法 2017年3月~2023年1月收治腘窝囊肿病人92例,采用关节镜下双后内侧入路关节外囊壁切除术,根据末次随访MRI复查结果以及Rauschning和Lindgren提出的评价分级... 详细信息

目的探讨关节镜下双后内侧入路关节外囊壁切除术治疗腘窝囊肿的临床疗效。方法 2017年3月~2023年1月收治腘窝囊肿病人92例,采用关节镜下双后内侧入路关节外囊壁切除术,根据末次随访MRI复查结果以及Rauschning和Lindgren提出的评价分级标准评定手术疗效。结果 92例病人中,关节镜检查发现80例(86.96%)病人伴有关节内病变,包括软骨退行性病变52例(56.52%),内侧半月板撕裂48例(52.17%),外侧半月板撕裂28例(30.43%),前交叉韧带损伤17例(18.48%),髌骨软骨软化3例(3.26%),关节内游离体2例(2.17%),胫骨髁间棘骨折1例(1.09%),痛风性关节炎1例(1.09%),滑膜炎3例(3.26%),化脓性关节炎1例(1.09%),平均发病时间11.71个月(0.03~120个月),所有病人均获得术后随访,平均随访时间12.8个月(6~23个月)。随访期间均未出现下肢深静脉血栓、神经血管损伤和感染等严重并发症。末次随访MRI发现2例病人有囊肿残留。Rauschning和Lindgren评价分级结果:术前Ⅰ级13例、Ⅱ级53例、Ⅲ级26例;术后末次随访0级74例、Ⅰ级18例。结论关节镜下双后内侧入路关节外囊壁切除术治疗腘窝囊肿,手术切口小,恢复快,手术时间短,复发率低。

关键词：关节镜腘窝囊肿双后内侧入路关节外囊壁切除

Vibration attenuation of meta-mortar with spring-mass resonators

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Defence Technology（防务技术） 2023年第2期20卷 11-23页

作者： San-feng Liu Hai-long chen Yang Liu Hu-guang He Xi-yue An Feng-nian Jin hua-lin Fan State Key Laboratory for Disaster Prevention&Mitigation of Explosion&Impact Army Engineering University of PLANanjing210007China Research Center of Lightweight Structures and Intelligent Manufacturing State Key Laboratory of Mechanics and Control of Mechanical StructuresNanjing University of Aeronautics and AstronauticsNanjing210016China

Metamaterial based on local resonance has excellent vibration attenuation ability in low *** this research,an attempt was performed to make meta-mortar with spring-mass resonators to attenuate vibration and shock ***-spring-mass resonators and dual-spring-mass resonators were designed and made using lead or aluminum blocks and SWPB springs encased by PMMA(polymethyl methacrylate)or aluminum *** resonators were placed into mortar blocks to make metamortar *** attenuation effect was investigated by sweeping vibration with frequency from 50 Hz to 2000 *** these meta-mortar blocks exhibit excellent vibration attenuation ability in the designed band *** dual-spring-mass resonators,meta-mortar blocks have two distinct vibration attenuation bands.

关键词： Meta-mortar Vibration attenuation Spring-mass resonators

Disturbance observer-based control design for a class of nonlinear stochastic systems with periodically intermittent measurement

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Disturbance observer-based control design for a class of non...

T/CECS 10362—2024《钢-混组合梁界面用环氧砂浆》标准解读

第36届中国控制会议

作者： Kui Ding Wu-hua chen Xiaomei Lu Zhen Ruan College of Mathematics and Information Science Guangxi University

ISBN: (纸本)9781538629185

This paper treats the control problem of a class of nonlinear stochastic systems with unknown external disturbance and periodically intermittent measurement. It is assumed that the external disturbance is generated by an exogenous system with unknown initial condition, and the state information ia available only on some disconnected time intervals. A composite control method using the intermittent state information is proposed, which consists of an intermittent feedback control law and a disturbance observer. The stability property of the closed-loop error system is analyzed using a piecewise-time-dependent Lyapunov function approach. Then, a sufficient condition for the existence of the desired composite controllers is derived in terms of matrix inequalities. Finally, a numerical example is given to illustrate the effectiveness of the proposed result.

关键词： Disturbance observer-based control Periodically intermittent measurement Piecewise time-dependent Lyapunov function Linear matrix inequalities(LMIs)

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新型建筑材料 2024年第9期51卷 146-150页

作者：姚淑芳高硕马海旭侯园园陈英利马亚楠曾兵中国建筑科学研究院有限公司北京100013 建研院检测中心有限公司北京100013

随着新型工业化建造方式的推进,钢-混组合梁结构工程得到快速发展,钢-混组合梁界面用环氧砂浆作为一种新型复合材料以优异的综合性能而备受关注,并在多项重大工程中得以应用。简要介绍了团体标准T/CECS 10362—2024《钢-混组合梁界面用... 详细信息

随着新型工业化建造方式的推进,钢-混组合梁结构工程得到快速发展,钢-混组合梁界面用环氧砂浆作为一种新型复合材料以优异的综合性能而备受关注,并在多项重大工程中得以应用。简要介绍了团体标准T/CECS 10362—2024《钢-混组合梁界面用环氧砂浆》制订的背景和意义、制订过程、主要内容和依据,并详细阐述了该类环氧砂浆各技术指标及对应试验方法的制定原则,有利于该产品的推广和应用。

关键词：环氧砂浆钢-混组合梁结构界面技术指标试验方法

面向隧道结构修复的3D打印混凝土强度检测试验研究

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建筑施工 2024年第10期46卷 1584-1587页

作者：夏俊伟陈华俞俊平姚旭朋盛如意江西省交通投资集团项目建设管理公司江西南昌330200 江西省交通科学研究院有限公司江西南昌330200 同济大学上海200092

3D打印技术为隧道结构修复开辟了新途径,其中3D打印混凝土的性能是关键因素,特别是其超早龄期力学性能。探究了采用超声波波速检测超早龄期3D打印水泥基材料力学性质的可能性,对普通水泥净浆、不掺加外加剂普通砂浆和用于3D打印的掺外... 详细信息

3D打印技术为隧道结构修复开辟了新途径,其中3D打印混凝土的性能是关键因素,特别是其超早龄期力学性能。探究了采用超声波波速检测超早龄期3D打印水泥基材料力学性质的可能性,对普通水泥净浆、不掺加外加剂普通砂浆和用于3D打印的掺外加剂砂浆中的超声波波速特征以及无侧限单轴抗压强度进行试验,研究了终凝后相同时间的超声波波速特征和无侧限单轴抗压强度的发展规律及二者之间的联系。结果表明:在相同测试时间下,超声波波速在不同的超早龄期水泥基材料中表现出明显的差异性,并能够在超声波波速与水泥基材料超早龄期特定力学指标之间构建对应的数理关系,这为采用超声波法检测超早龄期水泥基材料力学特性提供了依据。

关键词： 3D打印混凝土超早龄期超声波波速隧道结构维护外加剂