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A NOTE ON THE GENERAL STABILIZATION OF DISCRETE FEEDBACK CONTROL FOR NON-AUTONOMOUS HYBRID NEUTRAL STOCHASTIC SYSTEMS WITH A DELAY

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Acta Mathematica Scientia 2024年第3期44卷 1145-1164页

作者：冯立超张春艳曹进德武志辉 College of Science North China University of Science and TechnologyTangshan063210China School of Mathematics Southeast UniversityNanjing210096China Department of Mathematics Harbin University of Science and TechnologyHarbin150080China

Discrete feedback control was designed to stabilize an unstable hybrid neutral stochastic differential delay system(HNSDDS) under a highly nonlinear constraint in the H_∞ and exponential forms.Nevertheless,the existing work just adapted to autonomous cases,and the obtained results were mainly on exponential stabilization.In comparison with autonomous cases,non-autonomous systems are of great interest and represent an important challenge.Accordingly,discrete feedback control has here been adjusted with a time factor to stabilize an unstable non-autonomous HNSDDS,in which new Lyapunov-Krasovskii functionals and some novel technologies are adopted.It should be noted,in particular,that the stabilization can be achieved not only in the routine H_∞ and exponential forms,but also the polynomial form and even a general form.

关键词： hybrid neutral stochastic differential delay system discrete feedback control general stabilization polynomial stabilization

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低压涡轮在工作剖面内的多学科耦合仿真

工程热物理学报 2024年第5期45卷 1374-1384页

作者：张云达邹正平姚李超北京航空航天大学能源与动力工程学院航空发动机气动热力国家级重点实验室北京100191 北京航空航天大学航空发动机研究院北京102206

在涡轮的典型工作剖面内,采用计算流体力学和两种多学科耦合求解方式对某二级低压涡轮部件进行仿真,比较不同求解方式所预测的涡轮气动热力参数之间的差异,分析工作剖面内局部几何的形变规律以及局部形变对流场的影响,结果表明:多学科... 详细信息

在涡轮的典型工作剖面内,采用计算流体力学和两种多学科耦合求解方式对某二级低压涡轮部件进行仿真,比较不同求解方式所预测的涡轮气动热力参数之间的差异,分析工作剖面内局部几何的形变规律以及局部形变对流场的影响,结果表明:多学科耦合作用对低叶高位置叶型负荷分布产生一定的影响,具体影响规律与不同工况密切相关。考虑固体域热传导和形变的多学科耦合求解方式所预测的效率值更高。随着涡轮功率的提升,级间轮缘间歇和封严篦齿间隙的改变会导致更多封严冷气聚集在前腔中,影响盘腔内的流动结构,削弱了燃气入侵现象,实现盘腔内更好的冷却和封严效果。

关键词：多学科耦合低压涡轮工作剖面

Novel per-oral cholangioscopy for treatment of occult accessory hepatic duct stones

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Gastroenterology Report 2023年第1期11卷 574-575页

作者： Tingting Yu Yaoting Li Hongfei He Senlin Hou lichao zhang Department of Biliopancreatic Endoscopic Surgery The Second Hospital of Hebei Medical UniversityShijiazhuangHebeiP.R.China

Introduction The accessory hepatic duct is a variation of the biliary tree and is considered to be an important factor contributing to bile duct injury during surgery[1].Accessory hepatic duct stones are a rare form of cholelithiasis.The angle at which the accessory hepatic duct opens into the common bile duct makes it difficult to remove stones using conventional endoscopic retrograde cholangiopancreatography(ERCP).We reported a rare and insidious case of an accessory hepatic duct stone.The patient’s abdominal computed tomography(CT)did not reveal any abnormalities,but endoscopic ultrasound revealed a stone in the bile duct opening into a branch of the common bile duct.The patient underwent ERCP,and cholangiography showed no abnormalities.However,the accessory hepatic duct opening was found in the common bile duct and the accessory hepatic duct stones were successfully removed using the EyeMax Choledochoscope System Digital Controller(Nanjing,China).

关键词： hepatic stones surgery

ERCP combined with colonoscopy in the treatment of biliary-colonic fistula:case report and literature review

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Gastroenterology Report 2023年第1期11卷 533-535页

作者： Hongfei He Tingting Yu Yaoting Li Senlin Hou lichao zhang Biliopancreatic Endoscopic Surgery Department The Second Hospital of Hebei Medical UniversityShijiazhuangHebeiP.R.China

Introduction Internal biliary fistula is a potentially serious complication of laparoscopic cholecystectomy[1].Biliary-colonic fistula is a rare type of internal biliary fistula.Formation of a biliary-colonic fistula can occur as the result of surgical injury,stone obstruction,and biliary hypertension.More infrequent causes include intestinal ulcer and malignant tumor.The formation of a fistula also has the effect of infection and inflammation.While very few cases of biliary-colonic fistulas have been reported,these cases typically present with the aforementioned clinical presentations[2,3].In the present case,a biliary-colonic fistula resulting from bile-duct injury after laparoscopic cholecystectomy was identified by endoscopic retrograde cholangiopancreatography(ERCP).We innovatively adopted ERCP combined with colonoscopy to clamp the sinus tract for the patient.

关键词： fistula biliary colonic

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基于计算叙事模型的虚假健康信息特征研究

情报杂志 2024年第2期43卷 152-161页

作者：孔杉杉张军冯立超山东理工大学管理学院淄博255000

[研究目的]面对海量健康信息,如何快速准确辨别信息真伪尤为重要。基于计算叙事模型对虚假健康信息的特征进行量化分析,为准确判别虚假健康信息提供方法支持。[研究方法]基于叙事学理论,构建社交媒体上虚假健康信息的计算叙事模型,从叙... 详细信息

[研究目的]面对海量健康信息,如何快速准确辨别信息真伪尤为重要。基于计算叙事模型对虚假健康信息的特征进行量化分析,为准确判别虚假健康信息提供方法支持。[研究方法]基于叙事学理论,构建社交媒体上虚假健康信息的计算叙事模型,从叙事内容、叙事逻辑和叙事链接三方面刻画虚假健康信息的特征,提出了基于语义角色标注的特征降维提取方法,从虚假健康信息文本中构建计算叙事网络,并通过网络结构分析比较不同类型虚假健康信息的特征差异。[研究结论]实证结果显示,叙事网络能刻画虚假健康信息的叙事策略和意图,并适用于不同类型虚假健康信息特征量化和分析。网络中的语义团块表示了叙事活动中的重要概念,叙事内容展示了不同健康领域中引人瞩目的问题。虚假健康信息的说服过程贯穿了行为诱导、夸张、心理认同等多种叙事逻辑,且多种逻辑之间通过结构洞和集聚型链接模式相辅相成。

关键词：虚假健康信息虚假信息特征叙事模型计算叙事叙事逻辑叙事链接模式叙事学理论

Genome resources for the elite bread wheat cultivar Aikang 58 and mining of elite homeologous haplotypes for accelerating wheat improvement

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Molecular Plant 2023年第12期16卷 1893-1910页

作者： Jizeng Jia Guangyao Zhao Danping Li Kai Wang Chuizheng Kong Pingchuan Deng Xueqing Yan Xueyong zhang Zefu Lu Shujuan Xu Yuannian Jiao Kang Chong Xu Liu Dangqun Cui Guangwei Li Yijing zhang Chunguang Du Liang Wu Tianbao Li Dong Yan Kehui Zhan Feng Chen Zhiyong Wang lichao zhang Xiuying Kong Zhengang Ru Daowen Wang Lifeng Gao College of Agronomy Collaborative Innovation Center of Henan Grain CropsState Key Laboratory of Wheat and Maize Crop Scienceand Center for Crop Genome EngineeringHenan Agricultural UniversityZhengzhou 450046HenanChina State Key Laboratory of Crop Gene Resources and Breeding the National Key Facility for Crop Gene Resources and Genetic ImprovementInsttute of Crop SciencesChinese Academy of Agricultural SciencesBeijing 100081China School of Life Science and Technology Henan Institute of Science and TechnologyXinxiangHenan 453003China xi'An Shansheng Biosciences Co. Ltd.Xi'an 71000China Zhejang Provincial Key Laboratory of Crop Genetic Resources College of Agriculture and BiotechnologyZhejang UniversityHangzhouZhejiang 310058China State Key Laboratory of Systematic and Evolutionary Botany Institute of BotanyChinese Academy of SciencesBeijing 100093China University of Chinese Academy of Sciences Bejing 100049China Key Laboratory of Plant Molecular Physiology Institute of BotanyChinese Academy of SciencesBejing 100093China State Key Laboratory of Genetic Engineering Colaborative Innovation Centerof Genetics and DevelopmentDeparment of BiochemistryInstitute of Plant BiologySchool of Life SciencesFudan UniversityShanghai 200438China Hainan Yazhou Bay Seed Laboratory Hainan Institute of Zhejiang UniversitySanyaHainan 56200China State Key Laboratory of Crop Stress Biology in Arid Areas College of AgronomyNorthwest&F UniversityYanglingShaanxi 612100China

Despite recent progress in crop genomics studies,the genomic changes brought about by modern breeding selection are still poorly understood,thus hampering genomics-assisted breeding,especially in polyploid crops with compound genomes such as common wheat(Triticum aestivum).In this work,we constructed genome resources for the modern elite common wheat variety Aikang 58(AK58).Comparative genomics between AK58 and the landrace cultivar Chinese Spring(CS)shed light on genomic changes that occurred through recent varietal improvement.We also explored subgenome diploidization and divergence in common wheat and developed a homoeologous locus-based genome-wide association study(HGWAS)approach,which was more effective than single homoeolog-based GWAS in unraveling agronomic trait-associated loci.A total of 123 major HGWAs loci were detected using a genetic population derived from AK58 and cs.Elite homoeologous haplotypes(HHs),formed by combinations of subgenomic homoeologs of the associated loci,were found in both parents and progeny,and many could substantially improve wheat yield and related traits.We built a website where users can download genome assembly sequence and annotation data for AK58,perform blast analysis,and run JBrowse.Our work enriches genome resources for wheat,provides new insights into genomic changes during modern wheat improve-.ment,and suggests that efficientmining of elite HHs can make a substantial contribuutionto genomics-assisted breeding in common wheat and other polyploid crops.

关键词： common wheat genome sequencing subgenome diploidization and divergence homoeologous Iocus-based GWAs homoeologous haplotypes polyploid crops

Analysis of the relationship between bile duct and duodenal microbiota reveals that potential dysbacteriosis is the main cause of primary common bile duct stones

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Synthetic and Systems Biotechnology 2021年第4期6卷 414-428页

作者： Zhitang Lyu Tingting Yu lichao zhang Xiaona Xu Yijun zhang Jihong Li Zhirong Li Wei zhang Senlin Hou School of Life Sciences Institute of Life Science and Green DevelopmentHebei UniversityBaodingPR China The Second Hospital of Hebei Medical University ShijiazhuangPR China Key Laboratory of Microbial Diversity Research and Application of Hebei Province BaodingPR China Engineering Laboratory of Microbial Breeding and Preservation of Hebei Province BaodingPR China

Bacteria play an important role in the formation of primary Common Bile Duct(CBD)stones.However,the composition and function of the microbiota of bile duct in patients with primary CBD stones remained to be explored.We utilized the 16S rRNA gene high-throughput sequencing technology to analyze the microbial diversity and community composition of biliary and duodenal microbiota in 15 patients with primary CBD stones and 4 patients without biliary tract diseases.Alpha diversity analysis showed that the microbiota richness was similar in bile and intestinal fluid;Beta diversity analysis showed that there were differences in the composition between biliary microbiota and the duodenal microbiota,but the abundance of the main groups showed similarities.The composition of the biliary microbiota from gallstone patients was more complex,as was the duodenal microbiota.Proteobacteria and Firmicutes were the dominant bacteria at phylum level,accounting for at least 75%of the total reads in each subgroup.Pseudomonas and Escherichia􀀀Shigella were the major genus among subgroups,but Escherichia-Shigella had increased abundance in duodenal microbiota with primary choledocholithiasis,which may play an important role in stone formation.It is noteworthy that Clostridiumsensu_stricto,Lachnospiraceae_UCG-008,Butyrivibrio and Roseburia which could produce short chain fatty acids(SCFAs),were significantly decreased in biliary microbiota with primary CBD stones(p<0.05).Our study provided new insights into the compositional of normal biliary microbiota.The micro-ecology of biliary and duodenal in patients with stones is complex and closely related,and there is a potential for dysbacteriosis.The decrease in abundance of certain major acid-producing bacteria affects the health of the biliary tract and thus leads to the formation of stones.

关键词： Primary common bile duct stones ERCP Dysbacteriosis Bile duct microbiota Duodenal microbiota 16S rRNA gene high-throughput sequencing Short chain fatty acids

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吊放声呐拖曳系统带速回收动力学建模与仿真

舰船科学技术 2024年第11期46卷 160-164页

作者：安莉丁立超张艳来中国船舶集团有限公司第七一五研究所浙江杭州310023 北京航空航天大学北京100191

吊放声呐是航空反潜重要的搜潜设备,吊放声呐采用带速回收的模式可减少作业时间,有效提高反潜作战效能。带速回收过程吊放电缆所受最大拉力、吊放电缆的偏转角以及水下分机的偏角对吊放声呐系统设计影响较大。建立带速回收过程的动力学... 详细信息

吊放声呐是航空反潜重要的搜潜设备,吊放声呐采用带速回收的模式可减少作业时间,有效提高反潜作战效能。带速回收过程吊放电缆所受最大拉力、吊放电缆的偏转角以及水下分机的偏角对吊放声呐系统设计影响较大。建立带速回收过程的动力学模型,根据风洞试验结果,对模型进行标定完善,并对吊放声呐的带速回收过程进行仿真。仿真结果表明,带速回收过程吊放电缆最大拉力基本保持稳定,吊放电缆偏转角与水下分机偏转角变化趋势一致,角度相差不大,同时风速对吊放电缆最大拉力影响很小,在一定范围内风速与吊放电缆偏转角负相关,有利于回收。

关键词：吊放声呐带速回收拖曳系统动力学建模

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底吹氩钢包内废钢熔化行为的数值模拟

工程科学学报 2024年第5期46卷 822-834页

作者：张利超方庆周文浩王家辉余刚张华倪红卫武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室武汉430081 湖南华菱湘潭钢铁有限公司湘潭411101

以某厂70 t钢包为研究对象,采用数值模拟的方法对比了吹氩量对钢包内不同比表面积和预热温度的废钢熔化行为.结果表明:废钢熔化速度随着比表面积的增加而加快;底吹氩气可显著加速废钢熔化,但随着比表面积的增加吹气的促进效果逐步减弱.... 详细信息

以某厂70 t钢包为研究对象,采用数值模拟的方法对比了吹氩量对钢包内不同比表面积和预热温度的废钢熔化行为.结果表明:废钢熔化速度随着比表面积的增加而加快;底吹氩气可显著加速废钢熔化,但随着比表面积的增加吹气的促进效果逐步减弱.有底吹氩时,比表面积为120、130.22和160.81 m^(2)·m^(-3)的废钢中心温度上升速率相较于无底吹氩时分别提高了7.06、6.51和3.73 K·s^(-1),熔化速率分别增加了0.92、0.88和0.28 cm^(3)·s^(-1),熔化时间分别缩短了17、15和3 s.板形废钢初始温度由300升到1000 K时,其熔化速度由2.97提高到3.26 cm^(3)·s^(-1),熔化时间缩短了3 s.底吹氩流量显著影响废钢熔化速度,当氩气流量由100增至200 L·min^(-1)时,比表面积为120、130.22和160.81 m^(2)·m^(-3)的废钢熔化时间分别由44减小到35 s、42减小到34 s及34减小到31 s.

关键词：钢包废钢熔化底吹氩比表面积数值模拟