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工程塑料应用 2010年第10期38卷 55-57页

作者：杨中文刘西文湖南科技职业学院长沙410118

采用聚乙烯、(乙烯/乙烯醇)共聚物通过流延共挤技术生产出高阻隔纳米抗菌包装膜,考察了包装膜的抗菌性及阻隔性。结果表明,该包装膜具有较好的抗菌性及高阻隔性,与传统铝塑复合槟榔包装相比,可提高槟榔保质期及降低成本。

关键词：高阻隔纳米抗菌聚乙烯 (乙烯/乙烯醇)共聚物包装应用

Potential prebiotic effects of nonabsorptive components of Keemun and Dianhong black tea:an in vitro study

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Food Science and Human Wellness 2022年第3期11卷 648-659页

作者： Wenjing Liao Wenjiao Li Suyu liu Dong Tang Yunxi Chen Yijun Wang zhongwen Xie Jinbao Huang State Key Laboratory of Tea Plant Biology and Utilization Key Laboratory of Food Nutrition and SafetySchool of Tea&Food Science and TechnologyAnhui Agricultural UniversityHefei 230036China

Black tea is a healthy and popular tea ***,its main bioactive compounds(theaflavins and thearubigins)are not easily *** aim of this study was to investigate the modulation of intestinal microbiota by the nonabsorptive components of Keemun black tea(KBT)and Dianhong black tea(DBT),and fructooligosaccharide(FOS)was selected for use in the control ***,DBT,and FOS significantly increased total short-chain acid ***,FOS treatment predominantly increased the production of acetic acids and black tea treatments increased the production of acetic,propionic,and butyric acids at similar ***,FOS exerted a strong bifidogenic effect after 24 h of fermentation;KBT and DBT increased the abundance of the beneficial genus Bacteroides and *** summary,the nonabsorptive components of KBT and DBT could serve as novel prebiotics,the underlying mechanisms of which are quite different from those of FOS.

关键词： Black tea Intestinal microbiota Anaerobic fermentation Short-chain fatty acid

An Evaluation Method of Human Gut Microbial Homeostasis by Testing Specific Fecal Microbiota

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Engineering 2023年第10期29卷 110-119页

作者： zhongwen Wu Xiaxia Pan Yin Yuan Pengcheng Lou Lorina Gordejeva Shuo Ni Xiaofei Zhu Bowen liu Lingyun Wu Lanjuan Li Bo Li State Key Laboratory for Diagnosis and Treatment of Infectious Diseases National Clinical Research Center for Infectious DiseasesCollaborative Innovation Center for Diagnosis and Treatment of Infectious DiseasesThe First Affiliated HospitalCollege of MedicineZhejiang UniversityHangzhou 310003China Jinan Microecological Biomedicine Shandong Laboratory Jinan 250000China Research Units of Infectious Disease and Microecology Chinese Academy of Medical SciencesBeijing 100730China School of Medicine Zhejiang UniversityHangzhou 310000China Department of Orthopedic Surgery and Shanghai Institute of Microsurgery on Extremities Shanghai Sixth People’s Hospital Affiliated to Shanghai Jiaotong University School of MedicineShanghai 200233China Department of Infectious Diseases Hangzhou Ninth People’s HospitalHangzhou 310003China Department of Radiation Oncology The First Affiliated HospitalZhejiang University School of MedicineHangzhou 310003China

Research on microecology has been carried out with broad perspectives in recent decades,which has enabled a better understanding of the gut microbiota and its roles in human health and *** is of great significance to routinely acquire the status of the human gut microbiota;however,there is no method to evaluate the gut microbiome through small amounts of fecal *** this study,we found ten predominant groups of gut bacteria that characterized the whole microbiome in the human gut from a large-sample Chinese cohort,constructed a real-time quantitative polymerase chain reaction(qPCR)method and developed a set of analytical approaches to detect these ten groups of predominant gut bacterial species with great maneuverability,efficiency,and quantitative *** ranges for the ten predominant gut bacterial groups were established,and we found that the concentration and pairwise ratios of the ten predominant gut bacterial groups varied with age,indicating gut microbial *** comparing the detection results of liver cirrhosis(LC)patients with those of healthy control subjects,differences were then analyzed,and a classification model for the two groups was built by machine *** the six established classification models,the model established by using the random forest algorithm achieved the highest area under the curve(AUC)value and sensitivity for predicting *** research enables easy,rapid,stable,and reliable testing and evaluation of the balance of the gut microbiota in the human body,which may contribute to clinical work.

关键词： Gut microbiota Machine learning Microbial dysbiosis Quantitative polymerase chain reaction Chinese cohort

Key theoretical and technical issues and countermeasures for effective development of Gulong shale oil, Daqing Oilfield, NE China

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Petroleum Exploration and Development 2023年第3期50卷 638-650页

作者： YUAN Shiyi LEI Zhengdong LI Junshi YAO zhongwen LI Binhui WANG Rui liu Yishan WANG Qingzhen CNPC Advisory Center Beijing 100724China PetroChina Research Institute of Petroleum Exploration&Development Beijing 100083China PetroChina Daging Oilfield Co. Ltd.Daging 163002China

Aiming at the four issues of underground storage state,exploitation mechanism,crude oil flow and efficient recovery,the key theoretical and technical issues and countermeasures for effective development of Gulong shale oil are put *** key exploration and research on fluid occurrence,fluid phase change,exploitation mechanism,oil start-up mechanism,flow regime/pattern,exploitation mode and enhanced oil recovery(EOR)of shale reservoirs with different storage spaces,multi-scale occurrence states of shale oil and phase behavior of fluid in nano confined space were provided,the multi-phase,multi-scale flow mode and production mechanism with hydraulic fracture-shale bedding fracture-matrix infiltration as the core was clarified,and a multi-scale flow mathematical model and recoverable reserves evaluation method were preliminarily *** feasibility of development mode with early energy replenishment and recovery factor of 3o%was *** on these,the researches of key theories and technologies for effective development of Gulong shale oil are proposed to focus on:(1)in-situ sampling and non-destructive testing of core and fluid;(2)high-temperature,high-pressure,nano-scale laboratory simulation experiment;(3)fusion of multi-scale multi-flow regime numerical simulation technology and large-scale application software;(4)waterless(CO_(2))fracturing technique and the fracturing technique for increasing the vertical fracture height;(5)early energy replenishment to enhance oil recovery;(6)lifecycle technical and economic ***,a series of exploitation tests should be performed on site as soon as possible to verify the theoretical understanding,optimize the exploitation mode,form supporting technologies,and provide a generalizable development model,thereby supporting and guiding the effective development and production of Gulong shale oil.

关键词： Gulong shale oil continental shale oil nano confined space production mechanism flow mode early energy replenishment enhanced oil recovery

气象要素对半干旱区春玉米干物重的影响及其胁迫效应研究

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农学学报 2024年第7期14卷 94-100页

作者：周忠文刘英邱宁刚张天峰张文杜军中国气象局沈阳大气环境研究所沈阳110016 甘肃省庆阳市气象局甘肃庆阳745000 甘肃省宁县气象局甘肃宁县745200

本研究旨在深入理解气候变化对旱作玉米生长发育和产量形成的影响及其胁迫机制,以期为半干旱区春玉米适应极端气候、实施防灾减灾策略提供科学依据。基于1994—2022年连续29 a玉米干物质观测资料及气象因子资料,本研究运用线性回归、多... 详细信息

本研究旨在深入理解气候变化对旱作玉米生长发育和产量形成的影响及其胁迫机制,以期为半干旱区春玉米适应极端气候、实施防灾减灾策略提供科学依据。基于1994—2022年连续29 a玉米干物质观测资料及气象因子资料,本研究运用线性回归、多项式函数、相关分析等方法,探讨了气象要素对玉米干物质积累的影响及其胁迫效应。研究发现,在过去29 a间,玉米干物重的年际间波动显著,且气候变化对干物质积累与生长率的影响不一致。气象因素在玉米营养生长期对其干物重影响较小,而在生殖生长期影响较大。其中,降水量被确认为影响半干旱区玉米干物重的最重要气象因素。积温和日照条件基本能满足玉米生长发育需求,而干物重积累主要受七叶期—抽雄期降水量、抽雄—乳熟期≥10℃积温及抽雄—成熟期的日照时数的影响。伏旱和初秋连阴雨是陇东玉米主要胁迫因素。拔节期后的光照、温度和水分合理配合程度决定了干物重的水平,而开花后10 d开始到开花后60 d是有效干物重增长关键期,灌浆速度和灌浆期的持续时间直接影响有效干物重的积累。本研究结果可为西北黄土高原旱作玉米在气候变化背景下的适应性管理提供参考。

关键词：气象要素半干旱区春玉米干物重影响胁迫

RETM热稳定剂在PVC-U透明片中的应用

同方期刊数据库博看期刊评论

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塑料科技 2008年第1期36卷 84-87页

作者：杨中文刘西文湖南科技职业学院湖南长沙410118

将马来酸单酯稀土(RETM)热稳定剂用于硬聚氯乙烯(PVC-U)透明片中,并对其热稳定性、加工性能、透明性等进行了研究,结果表明:RETM与适量的硬脂酸锌配合,且用量比为3/2时,其初、长期热稳定效果均较佳。RETM能促进PVC-U体系凝胶化,改善其... 详细信息

将马来酸单酯稀土(RETM)热稳定剂用于硬聚氯乙烯(PVC-U)透明片中,并对其热稳定性、加工性能、透明性等进行了研究,结果表明:RETM与适量的硬脂酸锌配合,且用量比为3/2时,其初、长期热稳定效果均较佳。RETM能促进PVC-U体系凝胶化,改善其加工性能,制得的透明片透光率高,雾度小,其效果优于硬脂酸稀土,而与京锡8831基本相当,因此可以代替昂贵的有机锡热稳定剂在PVC-U透明片中应用。

关键词：马来酸单酯稀土硬聚氯乙烯透明片热稳定性加工性能

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305酯在船用PVC电缆料中应用研究

现代塑料加工应用 2007年第6期19卷 41-43页

作者：杨中文刘西文湖南科技职业学院湖南长沙410118

用305酯（双季戊四醇酯）增塑剂与其他添加剂配合使用，部分取代TOTM（偏苯三酸三辛酯）生产船用105℃PVC（聚氯乙烯）电线电缆料，并对其电性能，浸水后电性能等进行测试分析。结果表明，305酯为主增塑剂剂时，与4～5份的TCP（磷酸三... 详细信息

用305酯（双季戊四醇酯）增塑剂与其他添加剂配合使用，部分取代TOTM（偏苯三酸三辛酯）生产船用105℃PVC（聚氯乙烯）电线电缆料，并对其电性能，浸水后电性能等进行测试分析。结果表明，305酯为主增塑剂剂时，与4～5份的TCP（磷酸三甲酚酯）并用可以显著改善电缆料浸水电性能。在配方中应用二盐基性苯二甲酸铅和二盐基硬脂酸铅作稳定系统，更能保证电线电缆料浸水电性能的稳定。

关键词：增塑剂船聚氯乙烯电缆料浸水电性能磷酸三甲酚酯

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注射成型因素对聚丙烯制品光泽度的影响

现代塑料加工应用 2010年第5期22卷 52-54页

作者：刘西文杨中文湖南科技职业学院湖南长沙410118

通过一次因子法确定Taguchi法的试验因子,再采用Taguchi法对试验因子进行权重分析与优化。结果表明,在注射成型过程中,对聚丙烯(PP)制品光泽度影响因子的权重大小顺序是熔体温度、模具温度、保压压力、注射速度。对于PP最佳光泽度的注... 详细信息

通过一次因子法确定Taguchi法的试验因子,再采用Taguchi法对试验因子进行权重分析与优化。结果表明,在注射成型过程中,对聚丙烯(PP)制品光泽度影响因子的权重大小顺序是熔体温度、模具温度、保压压力、注射速度。对于PP最佳光泽度的注射成型工艺控制方案为熔体温度205℃、模具温度65℃、保压压力5MPa、注射速度50%。

关键词：聚丙烯光泽度试验因子熔体温度模具温度正交设计

直接抽吸和支架取栓对急性基底动脉闭塞患者预后及认知功能的疗效比较

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吉林医药学院学报 2024年第2期45卷 105-111页

作者：刘露刘玉峰张笑然支中文汪雨倩潘虹赵连东陈春徐州医科大学附属淮安医院神经内科江苏淮安223002

目的比较直接抽吸技术(a direct aspiration first-pass thrombectomy,ADAPT)和支架取栓(stent retriever thrombectomy,SR)对急性基底动脉闭塞(acute basilar artery occlusion,ABAO)患者的预后及认知的影响。方法前瞻性纳入神经内科2019年8月-2022年12月间诊断为ABAO患者共90例。根据机械取栓治疗的类型,将患者分为ADAPT组(44例)和SR组(46例)。比较两组患者一般临床资料、手术相关指标、临床预后、不良事件及认知功能。预后评估利用7 d NIHSS评分和90 d mRS评分;认知功能评估利用卒中后6个月MoCA评分;安全性评估利用不良事件发生率和死亡率。采用单因素分析及多因素Logistic回归模型分析影响ABAO患者发生不良临床预后和卒中后认知障碍(poststroke cognitive impairment,PSCI)的独立危险因素。结果ADAPT组与SR组患者间的血管成功再通率、术后7 d NIHSS评分、90 d良好结局率(mRS评分≤2分)、6个月后PSCI发生率、不良事件发生率比较,差异均无统计学意义(均P>0.05)。但较SR组,ADAPT组患者的血管再通尝试次数更少,穿刺至血管开通时间和发病至血管再通时间更短(均P<0.05)。多因素Logistic回归分析显示,糖尿病史(OR=18.922,95%CI:2.787~128.474;P=0.003)、基线高NIHSS评分(OR=1.195,95%CI:1.088~1.316;P=0.000)和低pc-ASPECTS评分(OR=0.298,95%CI:0.154~0.576;P=0.000)是ABAO患者临床预后不良的独立危险因素。高龄(OR=1.150,95%CI:1.034~1.279;P=0.010)、较长的发病至血管再通时间(OR=1.006,95%CI:1.000~1.012;P=0.035)、基线高NIHSS评分(OR=1.120,95%CI:1.039~1.208;P=0.003)和低pcASPECTS评分(OR=0.571,95%CI:0.355~0.918;P=0.021)是ABAO患者发生PSCI的独立危险因素。结论与SR技术对比,ABAO患者行ADAPT治疗具有相同的临床疗效和安全性,但是行ADAPT可减少再通尝试次数,获得更短的血管开通时间。糖尿病、基线高NIHSS评分和低pc-ASPECTS评分与ABAO患者不良的临床预后独立相关。高龄、较长的发病至血管再通时间、基线高NIHSS评分和低pc-ASPECTS评分与ABAO患者PSCI的发生独立相关。

关键词：卒中基底动脉闭塞机械取栓 ADAPT 支架取栓临床预后

计及综合需求响应的综合能源系统主从博弈优化调度策略

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东北电力大学学报 2024年第4期44卷 46-55,85页

作者：严干贵陈佰会王佳琪严涵刘威扬闫忠文现代电力系统仿真控制与绿色电能新技术教育部重点实验室(东北电力大学) 吉林吉林130012

在面对不断增多的利益相关方和区域综合能源系统的物理耦合的背景下,提出了一种创新的调度策略,该策略考虑到多方的需求响应,并采用了多主体博弈的方式进行优化。首先,深入研究了各微网中不同负荷的实际特性和用户的响应行为,并建立了... 详细信息

在面对不断增多的利益相关方和区域综合能源系统的物理耦合的背景下,提出了一种创新的调度策略,该策略考虑到多方的需求响应,并采用了多主体博弈的方式进行优化。首先,深入研究了各微网中不同负荷的实际特性和用户的响应行为,并建立了相应的多负荷综合需求响应模型;然后,将系统运营商作为上层领导者,微网负荷聚合商、集中式储能电站和风电场作为下层跟随者,构建了一个多主体主从博弈模型。在上层模型中,其目标是使系统运营商的售能收益最大化,通过优化来确定各微网的售能单价和补偿价格;而在下层模型中,致力于最小化各方的综合成本,通过优化来确定风电场的供能情况、各微网内多设备之间的能源出力情况以及储能电站的充放能策略。为了解决这个复杂的问题,最终采用了粒子群算法来求解上层主体模型,并使用Cplex求解器来求解下层从体模型,这两层模型相互影响,最终得到了博弈后的均衡策略。

关键词：主从博弈优化运行综合需求响应综合能源系统