检索结果-南通市图书馆

On the Spectral Spread of Bicyclic Graphs with Given Girth

在线全文

学校读者我要写书评

暂无评论

Acta Mathematicae Applicatae Sinica 2013年第3期29卷 517-528页

作者： Bing WANG Ming-qing zhai Jin-long SHU School of Mathematical Science Chuzhou University Department of Mathematics East China Normal University

The spectral spread of a graph is defined to be the difference between the largest and the least eigenvalue of the adjacency matrix of the graph. A graph G is said to be bicyclic, if G is connected and ｜E（G）｜ = ｜V （G）｜＋ 1. Let B（n, g） be the set of bicyclic graphs on n vertices with girth g. In this paper some properties about the least eigenvalues of graphs are given, by which the unique graph with maximal spectral spread in B（n, g） is determined.

关键词： bicyclic graph least eigenvalue spectral spread

程序性评价在全科临床诊疗思维课程评价中的应用

在线全文

学校读者我要写书评

暂无评论

中国全科医学 2025年第4期28卷 420-426页

作者：翟佳燚陆媛石建军于德华同济大学附属杨浦医院全科医学科上海市200090 上海市嘉定区嘉定镇街道社区卫生服务中心 201899 同济大学医学院全科医学系上海市200090 上海市全科医学与社区卫生发展研究中心 200090

背景全科临床诊疗思维是全科医生为患者提供高质量诊疗服务的关键,但因其属于无法被直接观察的抽象能力,所以并不适合用传统的方法进行评价。目的本文旨在通过优化课程教学评价方法提高全科医生临床诊疗思维培训效率,丰富医学教育评价... 详细信息

背景全科临床诊疗思维是全科医生为患者提供高质量诊疗服务的关键,但因其属于无法被直接观察的抽象能力,所以并不适合用传统的方法进行评价。目的本文旨在通过优化课程教学评价方法提高全科医生临床诊疗思维培训效率,丰富医学教育评价。方法于2022年9—12月,以同济大学医学院38名全科方向硕士研究生为对象,根据学习与工作经历分为在职组16名与住培组22名。培训课程包含核心、案例、结果3个模块,采取混合式教学方法开展实践。定量评价的内容为技能评分表、PBL评分表与案例评分表,主观评价的内容来自多源反馈。结果两组学员核心和案例模块首次课程评分比较,差异无统计学意义(P>0.05);两个模块末次课程得分比较,差异有统计学意义(P<0.05)。将总体学员以及两组学员核心和案例模块首、末次课程的定量评价得分比较,差异均有统计学意义(P<0.001)。主观评价性质分为肯定性评价与改进性评价,问诊能力、体格检查、辅助检查、健康管理、慢病管理课程的肯定性评价占比较低,而改进性评价占比较高;医患沟通、病历书写、多病共存、心身疾病、未分化疾病课程的肯定性评价占比较高,而改进性评价占比较低。结论程序性评价能够丰富全科思维评价体系、促进学员循序建构全科思维,同时也发现了“翻转课堂”是程序性评价的呈现形式。

关键词：全科医学教学教育,研究生程序性评价临床诊疗思维翻转课堂

维普期刊数据库博看期刊

Strontium Isotope Compositions of Hydrothermal Barite from the Yonaguni Ⅳ: Insight into Fluid/Sediment Interaction and Barite Crystallization Condition

在线全文

学校读者我要写书评

暂无评论

Journal of Ocean University of China 2020年第2期19卷 377-385页

作者： ZHANG Xia zhai Shikui yu Zenghui Key Laboratory of Submarine Geosciences and Prospecting Techniques Ministry of Education College of Marine Geosciences Ocean University of China

Hydrothermal barite is a typical low-temperature mineral formed during the mixing of hydrothermal fluid and *** of its extremely low solubility,barite behaves as a close system after crystallization and preserves the geochemical fingerprint of hydrothermal *** this study,the elemental contents and Sr isotope compositions of hydrothermal barites from the Yonaguni IV were determined using electron microprobe and LA-MC-ICP-MS *** these bases,the fluid/sediment interaction during the hydrothermal circulation and physicochemical condition of barite crystallization were *** show that the 87 Sr/86 Sr values of hydrothermal barites from the Yonaguni IV are apparently higher than those of the seawater and associated volcanic rocks,indicating the sufficient interaction between the hydrothermal fluid and overlying *** Sr abundance shows large variations,reflecting the changes in barite growth rate during the fluid *** mineralization condition in the Yonaguni IV was *** the crystallization of barite,hydrothermal fluid and seawater mixed in varying degrees,with the pro-portions of hydrothermal fluid varied from 36%to 72%.The calculated crystallization temperatures range from 109 to 220℃.Sediment plays a critical role during the mineralization process in the Yonaguni IV and incorporation of sediment component into hydrothermal system was prior to barite crystallization and sulfide mineralization.

关键词： strontium isotope hydrothermal barite fluid/sediment interaction crystallization condition Okinawa Trough

On the Distribution of Hecke Eigenvalues over Piatetski-Shapiro Prime Twins

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2021年第9期37卷 1453-1464页

作者： De yu ZHANG Wen Guang zhai School of Mathematics and Statistics Shandong Normal UniversityJinan 250358P.R.China Department of Mathematics China University of Mining and TechnologyBeijing 100083P.R.China

Letλf(n)be the normalized n-th Fourier coefficient of holomorphic eigenform f for the full modular group and Pc(x):={p≤x|[pc]prime},c∈R+.In this paper,we show that for all 0 详细信息

Letλf(n)be the normalized n-th Fourier coefficient of holomorphic eigenform f for the full modular group and Pc(x):={p≤x|[pc]prime},c∈R+.In this paper,we show that for all 0

关键词： Hecke eigenvalue Piatetski-Shapiro primes asymptotic formula

Lactobacillus plantarum CCFM8610 Alleviates Irritable Bowel Syndrome and Prevents Gut Microbiota Dysbiosis:A Randomized,Double-Blind,Placebo-Controlled,Pilot Clinical Trial

在线全文

学校读者我要写书评

暂无评论

Engineering 2021年第3期7卷 376-385页

作者： Yang Liu Xinjie yu Leilei yu Fengwei Tian Jianxin Zhao Hao Zhang long Qian Qun Wang Zhengqing Xue Qixiao zhai Wei Chen State Key Laboratory of Food Science and Technology Jjiangnan UniversityWixi 214122China School of Food Science and Technology Jiangnan UniversityWuxi 214122China Hwa Chong Institution(College) Singapore 269734Singapore International Joint Research Laborutory for Probiotics Jiangnan University Wuxi 214122 China National Engineering Research Center for Functional Food Jjiangnan UniversityWuxdi 214122China Wiuxi Translational Medicine Research Center and Jiangsu Translatianal Medicine Research Institute Wuxi Branch Wixi 214122China (Yangzhou)Institute of Food Biotechnology Jiangnan UniversityYangzhou 225004China The Tinghu People's Hospital Yancheng 224002China Beijing Advanced Innnovation Center for Food Nutrition and Human Health Beijing Technology and Rasiness Univesity(BTBU)Bejing 100048China

Irritable bowel syndrome with diarrhea(IBS-D)is chronic intestinal dysfunction with diarrhea and othercomplicated clinical symptoms,and it has a great impact on the daily life and mental state of *** studies have reported that ingestion of probiotics can significantly alleviate a variety of *** pupose of this study was to investigate the IBS-D-alleviating effects of a probiotic strain,lactobacillus plantarum(***)CCFM8610,with multiple health-promoting *** studywas a 12-week,randomized,double-blind,placebo-controlled,pilot clinical ***-five patientswere randomly assigned to receive the placebo,oligosaccharides,or *** CCFM8610(1×10^(10) colony-forming units(CFU)per day),with a 2-week run-in period,an 8-week intervention period,anda 2-week follow-up observation *** patients'clinical symptoms and quality of life were exam-ined by the IBS symptom severity scale(IBS-SsS)and the IlBS quality of life scale(IBS-QOL).Changes ingut microbiota composition and diversity were measured at the end of the intervention *** oraladministration of *** CCFM8610 significantly decreased the IBS-SSS and IBS-QOL scores,reduced IBS-D symptom severity,recovered gut microbiota diversity,decreased the relative abundanceof bloating-related genus Methanobrevibacter,and increased the relative abundance of butyric acid-producing genera,including Anaerostipes,Anaerotruncus,Bifidobacterium,Butyricimonas,*** findings suggest that ingestion of *** CCFM8610 can significantly alleviate clinical symptoms and gut microbiota dysbiosis in IBS-D *** IBS-D-alleviating effect of ***-tarum CCFM8610 may be related to theincrease in the relative abundance of butyric acid-producing genera in the intestine.

关键词： Lactobacillus plantarum Irritable bowelsyndrome Gut microbiota Butyric acid Clinical trial

PlantCADB:A Comprehensive Plant Chromatin Accessibility Database

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Genomics, Proteomics & Bioinformatics 2023年第2期21卷 311-323页

作者： Ke Ding Shanwen Sun Yang Luo Chaoyue long Jingwen zhai Yixiao zhai Guohua Wang State Key Laboratory of Tree Genetics and Breeding Northeast Forestry UniversityHarbin 150040China College of Information and Computer Engineering Northeast Forestry UniversityHarbin 150040China College of Life Science Northeast Forestry UniversityHarbin 150040China

Chromatin accessibility landscapes are essential for detecting regulatory elements,illustrating the corresponding regulatory networks,and,ultimately,understanding the molecular basis underlying key biological *** the advancement of sequencing technologies,a large volume of chromatin accessibility data has been accumulated and integrated for humans and other *** data have greatly advanced the study of disease pathogenesis,cancer survival prognosis,and tissue *** advance the understanding of molecular mechanisms regulating plant key traits and biological processes,we developed a comprehensive plant chromatin accessibility database(PlantCADB)from 649 samples of 37 *** samples are abiotic stress-related(such as heat,cold,drought,and salt;159 samples),development-related(232 samples),and/or tissue-specific(376 samples).Overall,18,339,426 accessible chromatin regions(ACRs)were *** ACRs were annotated with genomic information,associated genes,transcription factor footprint,motif,and single-nucleotide polymorphisms(SNPs).Additionally,PlantCADB provides various tools to visualize ACRs and corresponding *** thus forms an integrated,annotated,and analyzed plant-related chromatin accessibility resource,which can aid in better understanding genetic regulatory networks underlying development,important traits,stress adaptations,and evolution.

关键词： Chromatin accessibility Plant Transcription factor footprint Regulatory network Stress response

A Note on L(2,1)-labelling of Trees

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Mathematicae Applicatae Sinica 2012年第2期28卷 395-400页

作者： Ming-qing zhai Chang-hong LU Jin-long SHU School of Mathematical Science Nanjing Normal University Jiangsu Nanjing 210046 China Department of Mathematics Chuzhou University Chuzhou 239012 China Department of Mathematics East China Normal University Shanghai 200241 China

An L（2, 1）-labelling of a graph G is a function from the vertex set V（G） to the set of all nonnegative integers such that │f（u） - f（v）│≥2 if dG（u, v） = 1 and │f（u） - f（v）│ ≥ 1 if dG（u, v） = 2. The L（2, 1）-labelling problem is to find the smallest number, denoted by A（G）, such that there exists an L（2, 1）-labelling function with no label greater than it. In this paper, we study this problem for trees. Our results improve the result of Wang [The L（2, 1）-labelling of trees, Discrete Appl. Math. 154 （2006） 598-603].

关键词： distance-two labelling L(2, 1)-labelling tree

Elemental geochemical records of seafloor hydrothermal activities in the sediments from the Okinawa Trough

在线全文

学校读者我要写书评

暂无评论

Acta Oceanologica Sinica 2007年第4期26卷 53-62页

作者： zhai Shikui yu Zenghui DU Tongjun Department of Marine Geosciences Ocean University of China Qingdao 266003 China

The major and minor element contents in the sediment core H9 from the hydrothermal fields of the Okinawa Trough show a sharp change at the depth of 80 cm. The elements enriched in the upper 80 cm core are those enriched in the hydrothermal deposits and in the surface sediments recovered from the hydrothermal fields in the trough, which indicates the input of hydrothermal materials. Comparing with other hydrothermal sediments from Mid-ocean Ridges or the Lau Basin, the degree of the enrichment of elements iron, copper,cobah, and nickel is relatively low. However, the enrichment of elements manganese, lead, arsenic, antimony and mercury is remarkable. The average contents of these elements in the upper 80 cm core sediments are three to six times those in the lower section, and 3 - 12 times those in the surface sediments which are not influenced by hydrothermal activities. Hydrothermal activities have contributed significant manganese, lead, arsenic, antimony and mercury to the sediments, and these elements are distinct indicators for the hydrothermal activity in the Okinawa Trough. The significant enrichment of these elements in Core H9 upward from the depth 80 cm indicates the start or the significant enhancing of the hydrothermal activity in this area at about 5 740 aB. P. The average accumulation rate of manganese during this period is about 40 461μg/（ cm^2·ka） , which is similar to the hydrothermal sediments in the Lau Basin or the East Pacific Rise.

关键词： Okinawa Trough hydrothermal activity elemental geochemical record

Electrocatalytic oxidation of ethanol and ethylene glycol on bimetallic Ni and Ti nanoparticle-modified indium tin oxide electrode in alkaline solution

在线全文

学校读者我要写书评

暂无评论

Progress in Natural Science:Materials International 2019年第5期29卷 511-516页

作者： Yanan yu Miaomiao zhai Jingbo Hu State Key Laboratory of Animal Nutrition Institute of Animal Science Chinese Academy of Agricultural Sciences Scientific Observing and Experiment Station of Animal Genetic Resources and Nutrition in North China Ministry of Agriculture College of Chemistry Beijing Normal University

Bimetallic Ni and Ti nanoparticle-modified indium tin oxide electrode(Ni–TiNPs/ITO) were prepared by a twostep ion implantation method, and their electrocatalytic activity toward the oxidation of ethanol and glycol was evaluated. The ion-implantation method is simple, low-cost and environmental friendly without the use of any binder. The Ni–TiNPs/ITO electrode were characterized by scanning electron microscopy(SEM), atomic force microscopy(AFM) and X-ray photoelectron spectroscopy(XPS). SEM and AFM showed that the nanoparticles on the Ni–TiNPs/ITO electrode had a small range of dispersion(10–20 nm) and high dispersion. Electrochemical performances were measured by cyclic voltammetry(CV) and chronoamperometrics. The Ni–TiNPs/ITO electrode exhibited much higher electrocatalytic activity and stability for ethanol and ethylene glycol oxidation than NiNPs/ITO.

关键词： Bimetallic Ni–Ti nanoparticles Electrocatalytic oxidation Ethanol Ethylene glycol