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基于玻璃化转变温度的沥青混合料低温性能研究

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华南理工大学学报（自然科学版） 2010年第10期38卷 89-93页

作者：尹应梅张肖宁邹桂莲华南理工大学土木与交通学院广东广州510640 广东工业大学土木与交通工程学院广东广州510006

鉴于目前尚未有公认、合理的沥青和沥青混合料低温性能评价指标,提出采用玻璃化转变温度来进行评价.采用动态剪切流变仪AR-2000对不同沥青和沥青混合料在线粘弹范围内进行了动态频率扫描;应用时温等效原理对频率扫描结果分析得到不同材... 详细信息

鉴于目前尚未有公认、合理的沥青和沥青混合料低温性能评价指标,提出采用玻璃化转变温度来进行评价.采用动态剪切流变仪AR-2000对不同沥青和沥青混合料在线粘弹范围内进行了动态频率扫描;应用时温等效原理对频率扫描结果分析得到不同材料的玻璃化转变温度,并用沥青混合料低温弯曲试验进行验证.结果表明,由动态频率扫描测试得到的玻璃化转变温度符合路面实际情况,且物理意义明确,沥青和沥青混合料的玻璃化转变温度与混合料低温弯曲破坏应变相关性良好.因此,玻璃化转变温度可用于评价沥青和沥青混合料的低温性能.

关键词：沥青混合料玻璃化转变温度主曲线低温性能动态剪切流变仪

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甲基纤维素(MC)疏水作用的电化学研究

化学学报 2005年第17期63卷 1621-1625,F0008页

作者：沈鸿强尹屹梅张洪斌上海交通大学化学化工学院高分子科学与工程系上海200240

应用电化学循环伏安法,以电活性小分子亚甲基蓝(MB)为探针,研究了不同温度下修饰在玻碳电极表面的甲基纤维素(MC)凝胶的疏水性.研究发现,在45～70℃温度范围内,MB在MC凝胶修饰电极上的式电位E0′较相应的裸电极均正移,氧化峰电流ipa和... 详细信息

应用电化学循环伏安法,以电活性小分子亚甲基蓝(MB)为探针,研究了不同温度下修饰在玻碳电极表面的甲基纤维素(MC)凝胶的疏水性.研究发现,在45～70℃温度范围内,MB在MC凝胶修饰电极上的式电位E0′较相应的裸电极均正移,氧化峰电流ipa和还原峰电流ipc分别较相应裸电极增大,且随温度升高而增大.这些结果表明MC分子之间发生了疏水相互作用,且随温度的升高,疏水作用增强.此外,在上述温度下,MC凝胶修饰电极上峰电流的比值ipc/ipa均小于1,为0.70,且没有观察到MB单独的吸附峰,因此MB分子在凝胶修饰电极上发生了弱吸附.本文研究显示电化学方法是研究该类多糖凝胶机理的一个补充手段.

关键词：甲基纤维素亚甲基蓝疏水作用循环伏安法多糖电化学研究电化学循环伏安法凝胶机理温度范围修饰电极

Original article：Extracorporeal membrane oxygenation during double-lung transplantation： single center experience

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Chinese Medical Journal 2010年第3期123卷 269-273页

作者： XU Ling-feng LI Xin GUO Zhen XU mei-yin GAO Cheng-xin ZHU Jin-hong JI Bing-yang Department of Cardiopulmonary Bypass Department of Anesthesiology Department of Thoracic Surgery Department of Cardiopulmonary Bypass Beijing Anzhen Hospital Capital Medical University Beijing 100029 China

Background For patients with end-stage lung diseases, lung transplantation is the final therapeutic option. Sequential double-lung transplantation is recognized as an established procedure to avoid cardiopulmonary bypass （CPB）. But some of the sequential double-lung transplantations require CPB support during the surgical procedure for various reasons. However, conventional CPB may increase the risk of bleeding and early allograft dysfunction. Extracorporeal membrane oxygenation （ECMO） is more advantageous than conventional CPB during the perioperative period of transplantation. Replacing traditional CPS with ECMO is promising for those patients needing cardiopulmonary support during a sequential double-lung transplantation procedure. This study aimed to summarize the preliminary experience of ECMO practice in lung transplantation.Methods Between November 2002 and October 2008, twelve patients with end-stage lung diseases undergoing sequential double-lung transplantation were subjected to ECMO during the surgical procedure. Eleven patients were prepared for the procedure via transverse thoracostomy （clamshell） and cannulated through the ascending aorta and right atrium for ECMO. The first patient who underwent bilateral thoracotomy for bilateral sequential lung transplantation required emergency ECMO via the femoral artery and vein during the second lung implantation. The Medtronic centrifugal pump and ECMO package （CBIV97R1, Medtronic, Inc., USA） were used for all of the patients. Results During ECMO, the blood flow rate was set between 1.8-2.0 ***-1 to keep hemodynamic and oxygen saturation stable; colloid oncotic pressure was maintained at more than 18 mmHg with albumin and hematocrit （HCT） kept at 28% or more. Two patients died early in this series and the other 10 patients were weaned from ECMO successfully. The duration of ECMO was 1.38-67.00 hours, and postoperative intubation was 10,5-67.0 hours. Conclusions As an established technique of cardiopulmon

关键词： sequential double-lung transplantations extracorporeal membrane oxygenation cardiopulmonary bypass

RCEP时代亚太经贸格局重构与中国的战略选择

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华南师范大学学报（社会科学版） 2021年第4期 5-18,205页

作者：于津平印梅南京大学商学院南京210093 南通大学经济与管理学院南通226019

历经漫长艰辛、一波三折的谈判,15个成员国凭借坚实的合作基础与经济依赖主动选择了同舟共济应对全球疫情危机以及多边体制滑向低效无序的趋势,在新的区域一体化框架下实现自身的利益诉求。RCEP签署的意义不仅在于经济层面,还在于战略... 详细信息

历经漫长艰辛、一波三折的谈判,15个成员国凭借坚实的合作基础与经济依赖主动选择了同舟共济应对全球疫情危机以及多边体制滑向低效无序的趋势,在新的区域一体化框架下实现自身的利益诉求。RCEP签署的意义不仅在于经济层面,还在于战略层面。RCEP开创了亚太区域多方面合作的新契机,将深刻改变亚太乃至全球经贸格局,也为中国参与全球经济治理,形成国际、国内新发展格局提供巨大助力。RCEP是中国目前深化亚太区域合作的最佳平台,中国要抓住机遇营造共同的利益愿景,在秉承互惠互利、求同存异、平等共赢的原则上助推RCEP进一步深化发展,巩固并强化与其他成员的利益纽带,对接RCEP与“一带一路”倡议,合纵连横整合资源,在亚太经贸格局重构中确立引领地位,彰显重要影响力。

关键词： RCEP 经贸格局重构利益纽带亚太自贸区

Analgesic and Anti-Inflammatory Effects of Herbal Mixture Extracts in Mice

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Pharmacology & Pharmacy 2018年第1期9卷 1-9页

作者： mei-yin Chien Cheng-Hung Chuang Yi-Ting Lin Chih-Min Yang Chao-Hsiang Chen Ko Da Pharmaceutical Co. Ltd. Taiwan School of Dentistry College of Oral Medicine Taipei Medical University Taiwan Department of Nutrition Master Program of Biomedical Nutrition Hungkuang University Taiwan Graduate Institute of Pharmacognosy Taipei Medical University Taiwan

Herbal mixture extracts (HME) comprised of Semen Sojae Nigrum, Fructus Cnidii, Radix Glycyrrhizae, and Cornu Cervi. Herein, we employed three mouse models, including hot-plate test, acetic acid (AA)-induced writhing test and AA-induced vascular permeability test, to determine analgesic and anti-inflammatory effects of HME. Results revealed that HME exhibited analgesic effects in hot-plate test and in AA-induced writhing test, as evidenced by increasing the latency to lick paws and decreasing AA-induced writhing counts, respectively. HME also significantly and dose-dependently decreased AA-induced vascular permeability, indicating HME exhibited anti-inflammatory effects. Similar improvement can be observed in aspirin treatment that used as positive control in this study. Most of medicinal effects of Fructus Cnidii are considered to attribute to coumarins, such as osthol (OST) and imperatorin (IMP) with several pharmacological activities. We then used OST and IMP as bioactive components in HME. The content of OST and IMP in HME was 3.57 ± 0.10 mg/g and 1.20 ± 0.02 mg/g, respectively, from three independent batches. Only OST possessed inhibitory effects in three mouse models, suggesting that OST may partially involve in protective effects of HME. These results demonstrated that HME has a potential on anti-analgesic effects and anti-inflammatory actions.

关键词： Analgesic Effects Herbal Mixture Extracts Inflammation Mice

Acute-on-chronic liver failure in a multi-ethnic Asian city:A comparison of patients identified by Asia-Pacific Association for the Study of the Liver and European Association for the Study of the Liver definitions

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World Journal of Hepatology 2017年第28期9卷 1133-1140页

作者： Anandraj Selva Rajoo Seng-Gee Lim Wah Wah Phyo Thandar Tun Yock-Young Dan yin-mei Lee How-Cheng Low Kieron Lim Poh-Seng Tan Guan-Huei Lee Yong Loo Lin School of Medicine National University of SingaporeSingapore 119077Singapore Institute of Molecular and Cell Biology ASTARSingapore 138668Singapore Division of Gastroenterology and Hepatology Department of MedicineNational University HospitalSingapore 119228Singapore Department of Hepatology Mandalay General Hospital30th StChan Aye Tharsan TownshipMandalayMyanmar

AIM To explore the applicability of the Asia-Pacific Association for the Study of the Liver(APASL) and European Association for the Study of the Liver(EASL) guidelines for acute-on-chronic liver failure(ACLF) in profiling patients and determining the *** Patients admitted to a tertiary hospital in Singapore with acute decompensation of liver disease from January 2004to July 2014 are screened for ACLF according to the APASL and EASL criteria. The patients' data(including basic demographics, information about existing chronic liver disease, information about the acute decompensation, relevant laboratory values during admission, treatment, and outcome) are retrospectively analyzed to determine the background, precipitating factors and *** A total of 458 liver patients is analyzed, and 78 patients with ACLF are identified. Sixty-three patients(80.8%) meet the APASL criteria, 64 patients(82.1%) meet the EASL criteria, and 49 patients(62.8%) fulfilled both criteria. The most common causes of acute liver injury are bacterial infections(59.0%), hepatitis B flare(29.5%), and variceal bleeding(24.4%). The common aetiologies of the underlying chronic disease included hepatitis B(43.6%), alcoholic(20.5%) and cryptogenic(11.5%) liver disease. The overall mortality rate is 61.5%. Increased age, the number of organ failures(as per CLIF-SOFA score), peak creatinine, INR, and amylase levels are associated with increased mortality or the need for liver transplantation. 14.3% of patients undergo liver transplantation with a 100% 1-year survival rate. CONCLUSION Both APASL and EASL criteria have identified ACLF patients with high three-month mortality, but those who fulfill APASL criteria alone have a better survival.

关键词： Acute-on-chronic liver failure Survival Prognosis Liver decompensation Liver cirrhosis

基于三维梁理论的电磁轨道炮复合身管抗弯性能分析

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兵工学报 2017年第8期38卷 1476-1482页

作者：尹冬梅肖宏成栗保明南京理工大学瞬态物理国家重点实验室江苏南京210094

基于复合材料的三维厚壁梁理论,考虑梁的三维应变、挠曲等效应,建立了圆形电磁轨道炮身管纤维缠绕复合外壳的等效抗弯刚度计算模型。采用组合梁的等效抗弯刚度计算法,对纤维缠绕的轨道炮身管的整体抗弯刚度进行了分析,并与层合板理论法... 详细信息

基于复合材料的三维厚壁梁理论,考虑梁的三维应变、挠曲等效应,建立了圆形电磁轨道炮身管纤维缠绕复合外壳的等效抗弯刚度计算模型。采用组合梁的等效抗弯刚度计算法,对纤维缠绕的轨道炮身管的整体抗弯刚度进行了分析,并与层合板理论法、有限元法做了对比。结果显示,3种计算方法在缠绕角度较大时,计算结果一致性较好。分析了纤维缠绕角度的变化、不同径向位置的碳纤维缠绕角度变化以及不同内膛绝缘材料对身管轴向抗弯刚度的影响。研究结果表明:身管的轴向抗弯刚度在缠绕角度较小时,随着缠绕角度的增大,呈明显的下降趋势,并且其受内层碳纤维的缠绕角度影响要比外层碳纤维的要大;高密度、高弹性模量的内膛绝缘材料并不一定就能提高身管的轴向抗弯刚度。

关键词：兵器科学与技术三维梁理论电磁轨道炮身管层合板理论抗弯刚度

全球价值链、汇率变动与出口贸易——基于双边视角的分析

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国际商务（对外经济贸易大学学报） 2019年第4期 129-142页

作者：印梅张艳艳南通大学经济与管理学院江苏南通226000 南京大学商学院江苏南京210000

以双边汇率与贸易数据为研究对象,分析了全球价值链是否弱化汇率对出口的影响及其影响机制,发现全球价值链通过后向参与的对冲效应与前向参与的竞争效应来削弱出口的汇率弹性,其削弱程度受全球价值链参与度以及进口投入来源分布与出口... 详细信息

以双边汇率与贸易数据为研究对象,分析了全球价值链是否弱化汇率对出口的影响及其影响机制,发现全球价值链通过后向参与的对冲效应与前向参与的竞争效应来削弱出口的汇率弹性,其削弱程度受全球价值链参与度以及进口投入来源分布与出口市场分布契合情况的影响。2005年汇率制度改革后,我国全球价值链后向参与度对汇率弹性的弱化效应已然下降,前向效应是削弱人民币汇率与出口联系的主要因素。相对而言,对发展中国家出口中的后向效应要强于对发达国家(地区)出口中的后向效应。建议政府相关部门审慎对待全球价值链对货币政策效果产生的影响,以避免作出过于乐观的政策预期。

关键词：全球价值链人民币汇率中间品投入

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基于改进模糊聚类的烟草品质集成评价模型

湖南农业大学学报（自然科学版） 2016年第4期42卷 359-364页

作者：尹梅周国雄湖南工程职业技术学院信息工程系湖南长沙410151 中南林业科技大学计算机与信息工程学院湖南长沙410004

针对烟草化学成分与烟草品质之间难以建立确定的数学模型的问题,提出了一种基于改进模糊聚类的烟草品质评价方法。该方法以烟叶样品的化学成分的差异性为依据,以模型分类结果与专家评吸结果的一致性为目标,利用模拟退火算法对现有的模... 详细信息

针对烟草化学成分与烟草品质之间难以建立确定的数学模型的问题,提出了一种基于改进模糊聚类的烟草品质评价方法。该方法以烟叶样品的化学成分的差异性为依据,以模型分类结果与专家评吸结果的一致性为目标,利用模拟退火算法对现有的模糊聚类算法进行优化改进,建立基分类器;在此基础上,利用Ada Boost将基分类器对于不同样本集的多个分类结果进行集成,形成最终的烟草品质评价模型。以130组烟叶作为烟草样本,测定了各烟叶样品中总糖、还原糖、总氮、烟碱、氧化钾、氯离子、蛋白质7种化学成分含量,并采用改进的模糊聚类方法与神经网络算法、模糊聚类算法进行对比试验,该方法的误检率为6.7%,具有提升小样本数据的辨识能力,优于所比较的其他2种方法。

关键词：模糊聚类模拟退火专家评吸烟草品质评价