检索结果-南通市图书馆

A TRUST REGION-TYPE METHOD FOR SOLVINGMONOTONE VARIATIONAL INEQUALITY

在线全文

学校读者我要写书评

暂无评论

Journal of Computational Mathematics 2000年第1期18卷 13-24页

作者： Xi-ming Liang Cheng-Xian Xu ji-xin Qian Institute of Industrial Process Control National Lab of Industrial Control TechnologyZhejiang UniversityHangzhou 310027China School of Science Xi’an Jiaotong UniversityXi’an 710049China

Presents a study which proposed to introduce a trust region-type modification of Newton method for the monotone inequality problem using merit function. Concepts of monotone mapping; Proof of convergence of algorithm ... 详细信息

关键词： variational inequality problem trust region method global convergence quadratic convergence

Detection and analysis of serum bile acid profile in patients with colonic polyps

在线全文

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2024年第13期12卷 2160-2172页

作者： xin ji Hong Chen School of Medicine Southeast UniversityNanjing 210009Jiangsu ProvinceChina Department of Gastroenterology Zhongda Hospital Southeast UniversityNanjing 210009Jiangsu ProvinceChina

BACKGROUND Analyzing the variations in serum bile acid(BA)profile can provide a certain biological basis for early warning and prevention of various *** is currently no comprehensive study on the relationship between the serum BA profile and colonic *** To study the serum BA profile detection results of patients with colonic polyps,and analyze the correlation between BA and colonic *** From January 1,2022,to June 1,2023,204 patients with colonic polyps who were diagnosed and treated at Zhongda Hospital Southeast University were chosen as the study subjects,and 135 non-polyp people who underwent physical examination were chosen as the control *** all patients'clinical information,typical biochemical indicators,and BA *** Compared with the control group,the serum levels of taurocholic acid,glycocholic acid,glycochenodeoxycholic acid,and taurochenodeoxycholic acid in the colonic polyp group were significantly higher than those in the control group,while the content of deoxycholic acid(DCA)was lower than that in the control group(P<0.05).When colonic polyps were analyzed as subgroups,it was shown that there was a strong correlation between changes in the BA profile and polyp diameter,location,morphology,pathological kind,*** The serum BA profile showed significant changes in patients with colonic polyps,with a significant increase in primary conjugated BA content and a decrease in secondary free bile acid DCA *** is a certain correlation between primary free BA and pathological parameters of polyps.

关键词： Serum Bile acid profile Colonic polyps Bile acid metabolism

Salinity Acclimation Induces Reduced Energy Metabolism,Osmotic Pressure Regulation and Transcriptional Reprogramming in Hypotrichida Ciliate Gastrostyla setifera

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Ocean University of China 2024年第2期23卷 539-549页

作者： ji xin BI Luping ZOU Songbao LI Wenlu ji Daode ZHANG Qianqian School of Ocean Yantai UniversityYantai 264005China Key Laboratory of Coastal Environmental Processes and Ecological Remediation Yantai Institute of Coastal Zone ResearchChinese Academy of SciencesYantai 264003China Zhejiang Institute of Freshwater Fisheries Huzhou 313001China Muping Coastal Environment Research Station Yantai Institute of Coastal Zone ResearchChinese Academy of SciencesYantai 264117China

Coastal and estuarine protists are frequently exposed to salinity *** the tolerance and stress responses of microalgae to salinity have been extensively studied,there have been scarce studies on the physiological response of heterotrophic protists to salinity *** this study,we investigated the physiological response of the heterotrophic ciliate Gastrostyla setifera to a salinity of 3,via a transcriptomic *** first transcriptome of genus Gastrostyla was obtained utilizing a group of manually isolated ciliate individuals(cells)and RNA-seq *** completeness of the transcriptome was *** expressed gene(DEG)analysis was performed among the transcriptomes of *** acclimated in saline water(salinity 3)and those cultured in fresh *** results demonstrated a significant alternation in gene transcription,in which the ciliate exhibits a transcripttomic acclimation in responding salinity *** up-regulated DEGs were enriched in the pathways of cytoskeleton proteins,membrane trafficking,protein kinases and protein *** may represent enhanced functions of ion transport,stress response and cell *** involved in energy metabolism and biosynthesis were markedly down-regulated,reflecting decreased cell ***,we detected significantly down-regulated genes involved in several pathways of amino acid catabolism,which may lead to accumulation of amino acids in the ciliate *** acid could act as compatible solutes in the cytoplasm to maintain the osmotic balance in saline ***,this work is an initial exploration to the molecular basis of the heterotrophic protist responding to salinity *** result sheds light on the mechanisms of enhancement of cell protection,reduction of cell activity,and osmotic pressure regulation in ciliates acclimated to salinity.

关键词： salinity stress heterotrophic protist ciliate Gastrostyla setifera transcriptome differentially expressed gene

菌酶复合制剂对湖羊生长性能、血清指标和粪便微生物的影响

在线全文

学校读者我要写书评

暂无评论

农业生物技术学报 2025年第1期33卷 134-145页

作者：祁帅仓振牛伟强李鹏张积鑫茆达干南京农业大学动物科技学院启东瑞鹏牧业有限公司

肉羊(Ovis aries)高度集约化养殖易导致氧化应激，机体抵抗力下降，胃肠菌群紊乱，影响生长性能。饲粮中添加菌酶复合制剂可改善肠道菌群结构，提高营养物质消化率和动物生长性能。为了探究菌酶复合制剂对湖羊生长性能、血清指标和粪便... 详细信息

肉羊(Ovis aries)高度集约化养殖易导致氧化应激，机体抵抗力下降，胃肠菌群紊乱，影响生长性能。饲粮中添加菌酶复合制剂可改善肠道菌群结构，提高营养物质消化率和动物生长性能。为了探究菌酶复合制剂对湖羊生长性能、血清指标和粪便微生物的影响，将48只2月龄的健康湖羊公羔((18.00±2.00) kg)随机分为4组，对照组饲喂基础日粮，实验组1、2、3分别添加0.1%、0.2%、0.3%菌酶复合制剂，预饲期7 d，正式期60 d。结果表明，与对照组相比，在31～60 d和1～60 d实验1和2组平均日增重(average daily gain, ADG)显著提高(P<0.05)，实验各组料重比(feed to gain ratio, F/G)均显著下降(P<0.05)；实验各组的血清白蛋白(albumin, ALB)和葡萄糖(glucose, GLU)含量均显著升高(P<0.05)，实验1组的高密度脂蛋白(high density lipoprotein, HDL)含量显著升高(P<0.05)；实验各组的超氧化物歧化酶(superoxidized dismutase, SOD)、过氧化氢酶(catalase, CAT)和谷胱甘肽过氧化物酶(glutathione peroxidase, GSH-Px)活性均显著升高(P<0.05)；实验各组的免疫球蛋白(immunoglobulin, Ig) IgA和IgG含量显著升高(P<0.05)，实验3组IgM含量显著升高(P<0.05)；实验2组的中性洗涤纤维(neutral detergent fibre, NDF)和酸性洗涤纤维(acid detergent fibre, ADF)表观消化率显著升高(P<0.05)；在门水平上，疣微菌门(Verrucomicrobiota)丰度显著提高(P<0.05)，蓝藻菌门(Cyanobacteria)和弯曲杆菌门(Campylobacterota)丰度显著降低(P<0.05)；在属水平上，另枝菌属(Alistipes)和普雷沃氏菌科UCG-001(Prevotellaceae＿UCG-001)丰度显著提高(P<0.05)，念珠菌＿糖单胞菌属(Candidatus＿Saccharimonas)丰度显著降低(P<0.05)。综上，菌酶复合制剂可提高湖羊生长性能、抗氧化和免疫能力，提高养分表观消化率，促进肠道有益菌的定植，抑制有害菌的定植，以0.2%添加量为最佳。本研究为菌酶复合制剂在湖羊生产中的应用提供科学依据。

关键词：湖羊生长性能菌酶复合制剂粪便微生物

Simultaneous approach for simulation of a high-temperature gas-cooled reactor

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2011年第7期12卷 567-574页

作者： Yang CHEN jiang-hong YOU Zhi-jiang SHAO Ke-xin WANG ji-xin QIAN State Key Laboratory of Industrial Control Technology Zhejiang University Hangzhou 310027 China

The simulation of a high-temperature gas-cooled reactor pebble-bed module(HTR-PM) plant is *** lumped parameter model has the form of a set differential algebraic equations(DAEs) that include stiff equations to model point neutron *** nested approach is the most common method to solve DAE,but this approach is very expensive and time-consuming due to inner *** paper deals with an alternative approach in which a simultaneous solution method is *** DAEs are discretized over a time horizon using collocation on finite elements,and Radau collocation points are *** resulting nonlinear algebraic equations can be solved by existing *** discrete algorithm is discussed in detail;both accuracy and stability issues are ***,the simulation results are presented to validate the efficiency and accuracy of the simultaneous approach that takes much less time than the nested one.

关键词： Differential algebraic equations(DAEs) High-temperature gas-cooled reactor(HTR) Simulation Simultaneous approach

Preparation of biocompatible structural gradient coatings on pure titanium

在线全文

学校读者我要写书评

暂无评论

中国有色金属学会会刊：英文版 2004年第Z1期14卷 323-327页

作者： TANG Guang-xin ZHANG Ren-ji YAN Yong-nian Department of Mechanical Engineering Tsinghua University Beijing 100084 China Department of Mechanical Engineering Tsinghua University Beijing 100084 China Department of Mechanical Engineering Tsinghua University Beijing 100084 China

In order to overcome the poor osteo-inductive properties of titanium implant, some methods have been used. The efforts to improve implant biocompatibility and durability by applying a hybrid technique of composite oxidation (pre-anodic and micro-arc oxidation) and hydrothermal treatment were described. Pure titanium was used as the substrate material. An oxalic acid was used as the electrolyte for the pre-anodic oxidation. A calcium and phosphate salt solution was acted as the electrolyte of micro-arc oxidation and the common pure water was used for hydrothermal treatment. X-ray diffraction (XRD), and scanning electron microscopy (SEM) have been used to investigate the microstructure and morphology of the coatings. The results show that a compact TiO2 film can be made by pre-anodic oxidation, which is effective as chemical barriers against the in-vivo release of metal ions from the implants. A porous TiO2 coating can be produced by micro-arc oxidation on titanium plate, which is beneficial to bone tissue growth and enhancing anchorage of implant to bone. De-calcium HA can be formed on the coating using hydrothermal treatment, which is similar with the primary component of bone and has a very good *** porous gradient titania coating made by the hybrid oxidation and hydrothermal treatment should show good biocompatibility in the environment of the human body.

关键词： biomaterials anodic oxidation hydroxyapatite micro-arc oxidation titanium oxide

A closed-loop particle swarm optimizer for multivariable process controller design

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第8期9卷 1050-1060页

作者： Kai HAN Jun ZHAO Zu-hua XU ji-xin QIAN State Key Lab of Industrial Control Technology Institute of Industrial Process Control Zhejiang University Hangzhou 310027 China

Design of general multivariable process controllers is an attractive and practical alternative to optimizing design by evolutionary algorithms (EAs) since it can be formulated as an optimization problem. A closed-loop particle swarm optimization (CLPSO) algorithm is proposed by mapping PSO elements into the closed-loop system based on control theories. At each time step, a proportional integral (PI) controller is used to calculate an updated inertia weight for each particle in swarms from its last fitness. With this modification, limitations caused by a uniform inertia weight for the whole population are avoided, and the particles have enough diversity. After the effectiveness, efficiency and robustness are tested by benchmark functions, CLPSO is applied to design a multivariable proportional-integral-derivative (PID) controller for a solvent dehydration tower in a chemical plant and has improved its performances.

关键词： Multivariable process control Proportional-integral-derivative (PID) control Model predictive control (MPC) Particle swarm optimization (PSO) Closed-loop system

The Fastest Rotating Pulsar:a Strange Star?

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2001年第6期18卷 837-840页

作者： XU Ren-xin XU Xuan-Bin WU xin-ji CAS-PKU Joint Beijing Astrophysical Center and Department of Astronomy Peking UniversityBeijing 100871

According to the observational limits on the radius and mass,the fastest rotating pulsar(PSR 1937+21)is probably a strange star,or at least some neutron star equations of state should be ruled out,if we suggest that a dipole magnetic field is relevant to its radio *** presume that the millisecond pulsar is a trange star with much low mass,small radius and weak magnetic moment.

关键词： probably pulsar observational

Far-field super-resolution chemical microscopy

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Light(Science & Applications) 2023年第7期12卷 1246-1267页

作者： Mingwei Tang Yubing Han Danchen jia Qing Yang ji-xin Cheng State Key Laboratory of Modern Optical Instrumentation College of Optical Science and EngineeringZhejiang UniversityHangzhou 310027China Intelligent Perception Research Institute Zhejiang LabHangzhou 311100China Department of Biomedical Engineering Department of Electrical and Computer EngineeringPhotonics CenterBoston UniversityBostonMA 02459USA

Far-feld chemical microscopy providing molecular electronic or vibrational fingerprint information opens a new window for the study of three-dimensional biological,material,and chemical *** microscopy provides a nondestructive way of chemical identification without exterior ***,the diffraction limit of optics hindered it from discovering more details under the resolution *** development of super-resolution techniques gives enlightenment to open this door behind far-field chemical ***,we review recent advances that have pushed the boundary of far-field chemical microscopy in terms of spatial *** further highlight applications in biomedical research,material characterization,environmental study,cultural heritage conservation,and integrated chip inspection.

关键词： chemical details optics