检索结果-南通市图书馆

A Mean Value of Cochrane Sum

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2009年第2期25卷 223-234页

作者： zhe Feng xu College of Science Xi'an Jiaotong University Xi'an 710049 P. R. China Department of Mathematics Northwest University Xi'an 710069 P. R. China

Let q 〉 4 be an integer. The main purpose of this paper is to study the mean value of Cochrane sum C（a, q） in quarter intervals, and obtain a sharp asymptotic formula for it.

关键词： Dedekind sum Cochrane sums mean value asymptotic formula

Effect of intensive multifactorial treatment on the intima-media thickness of large arteries in patients with new-onset type 2 diabetes mellitus

在线全文

学校读者我要写书评

暂无评论

Journal of zhejiang University-Science B(Biomedicine & Biotechnology) 2012年第5期13卷 378-385页

作者： Xiao-hong ZHAO zhe-rong xu Qin ZHANG Hai-feng GU Yun-mei YANG Department of Geriatrics the First Affiliated HospitalSchool of MedicineZhejiang UniversityHangzhou 310003China

Objective: To quantify the changes in blood glucose, blood lipids, blood pressure, and the intima-media thickness (IMT) of large arteries in patients with new-onset type 2 diabetes mellitus who received either intensive multifactorial treatment or conventional treatment. Methods: Two-hundred and ten patients with new-onset type 2 diabetes mellitus were randomly assigned to two groups: an intensive treatment group (n=110) and a conventional treatment group (n=100). Fasting blood glucose (FBG), glycosylated hemoglobin A1c (HbA1c), blood pressure, blood lipids [total cholesterol (TC), triglyceride (TG), low-density lipoprotein C (LDL-C), and high-density lipoprotein C (HDL-C)], and IMTs of large arteries (carotid, iliac, and femoral arteries) were determined before and at one and two years after starting treatment. The patients in the conventional treatment group received routine diabetes management in our outpatient department. Targets were established for patients in the intensive treatment group. Their blood glucose, blood lipids, and blood pressure levels were regularly monitored and therapeutic regimens were adjusted for those whose measurements did not meet the target values until all the parameters met the established targets. Within-group and between-group differences were evaluated. Results: A significantly greater percentage of patients in the intensive treatment group had LDL-C levels that reached the target value one year after starting treatment than those in the conventional treatment group (52.04% vs. 33.33%, P<0.05). No significant differences were found be- tween groups for FBG, HbA1c, blood pressure, TG, TC, or HDL-C. The percentages of patients with TG (51.02% vs. 34.48%), TC (52.04% vs. 33.33%), and LDL-C (61.22% vs. 43.67%) who met the respective target values in the in- tensive treatment group were all significantly higher than the corresponding percentages in the conventional treatment group two years after starting treatment (P<0.05). There were

关键词： Type 2 diabetes mellitus Intensive treatment Intima-media thickness (IMT) Large arteries

Inspires effective alternatives to backpropagation:predictive coding helps understand and build learning

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第11期20卷 3215-3216页

作者： zhenghua xu Miao Yu Yuhang Song School of Health Sciences and Biomedical Engineering Hebei University of TechnologyTianjinChina Department of Computer Science University of OxfordOxfordUK

Artificial neural networks are capable of machine learning by simulating the hiera rchical structure of the human *** enable learning by brain and machine,it is essential to accurately identify and correct the prediction errors,referred to as credit assignment(Lillicrap et al.,2020).It is critical to develop artificial intelligence by understanding how the brain deals with credit assignment in neuroscience.

关键词： assignment learning enable

Copper-catalyzed C–H bond functionalization enabled by programmed alternating current

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2025年第01期 10-11页

作者： Zhoumei Tan Kun xu Chengchu Zeng Beijing Key Laboratory of Environmental and Viral Oncology College of Chemistry and Life Science Beijing University of Technology

Synthetic electrochemistry has been selected as one of the Top Ten Emerging Technologies in Chemistry in 2023 by International Union of Pure and Applied Chemistry (IUPAC)[1]. It has emerged as a sustainable platform for organic synthesis and has exhibited a wide range of applications from academia to industry [2]. However, electrosynthesis has been predominantly performed by using direct current (DC).

关键词：

Role of iron ore in enhancing gasification of iron coke:Structural evolution,influence mechanism and kinetic analysis

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 58-69页

作者： Jie Wang Wei Wang xuheng Chen Junfang Bao Qiuyue Hao Heng zheng Runsheng xu School of Chemistry and Materials Science Hubei Engineering UniversityXiaogan 432000China Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education Wuhan University of Science and TechnologyWuhan 430081China Institue of Ironmaking Technology Baosteel Central Research InstituteShanghai 201999China State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

The utilization of iron coke provides a green pathway for low-carbon *** uncover the influence mechanism of iron ore on the behavior and kinetics of iron coke gasification,the effect of iron ore on the microstructure of iron coke was ***,a comparative study of the gasification reactions between iron coke and coke was conducted through non-isothermal thermogravimetric *** findings indicate that compared to coke,iron coke exhibits an augmentation in micropores and specific surface area,and the micropores further extend and *** provides more adsorption sites for CO_(2) molecules during the gasification process,resulting in a reduction in the initial gasification temperature of iron *** the heating rate in non-isothermal gasification can enhance the reactivity of iron *** metallic iron reduced from iron ore is embedded in the carbon matrix,reducing the orderliness of the carbon structure,which is primarily responsible for the heightened reactivity of the carbon *** kinetic study indicates that the random pore model can effectively represent the gasification process of iron coke due to its rich pore ***,as the proportion of iron ore increases,the activation energy for the carbon gasification gradually decreases,from 246.2 kJ/mol for coke to 192.5 kJ/mol for iron coke 15wt%.

关键词： low-carbon ironmaking iron coke gasification structural evolution kinetic model

On the Mean Value of the Complete Trigonometric Sums with Dirichlet Characters

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2007年第7期23卷 1341-1344页

作者： zhe Feng xu Department of Mathematics Northwest University

The main purpose of this paper is, using the analytic method, to study the mean value properties of the complete trigonometric sums with Dirichlet characters, and give an exact calculating formula for its fourth power... 详细信息

关键词： complete trigonometric sums Dirichlet character mean value

Chewing substances with or without tobacco and risk of cardiovascular disease in Asia:a meta-analysis

在线全文

学校读者我要写书评

暂无评论

Journal of zhejiang University-Science B(Biomedicine & Biotechnology) 2010年第9期11卷 681-689页

作者： Li-na ZHANG Yun-mei YANG zhe-rong xu Qi-feng GUI Qin-qing HU Department of Gerontology the First Affiliated Hospital School of Medicine Zhejiang University Hangzhou 310003 China Department of Nephrology the First Affiliated Hospital School of Medicine Zhejiang University Hangzhou 310003 China

Objective:To assess whether people who ever use any form of chewing substance in Asia are at increased risk of cardiovascular disease(CVD).Methods:PubMed and ISI Web of Science were searched for relevant studies,with no limitation on language or study *** were included if they provided quantitative estimate of the association between ever use of chewing substance and the occurrence of *** authors independently implemented inclusion criteria,abstracted study characteristics,and performed *** relative risks were estimated on the basis of a random effect *** used Q statistic and Egger's test to examine heterogeneity across studies and potential publication bias,***:Eight eligible studies were *** relative risk of CVD for ever using chewing substances with or without tobacco was 1.26(95% confidence interval(CI) 1.12-1.40),which was unchanged when restricted to cohort studies [1.25(1.08-1.42)] or cohort studies in Taiwan [1.31(1.12-1.51)].The summary relative risk for ischemic heart disease was 1.27(1.02-1.52),and was lowered to 1.26(0.85-1.67) after exclusion of a cross-sectional *** overall relative risk for cerebrovascular disease was 1.32(1.08-1.56).On the basis of the Taiwan data,the summary relative risk of CVD for betel(Areca catechu) chewing was 1.30(1.17-1.44).Data on dose-response were limited to betel chewing in Taiwan,suggesting a relationship between risk of CVD and cumulative *** large cohorts in Taiwan reported a greater risk of CVD with betel chewing than with ***:An association was detected between betel chewing with or without tobacco and the risk of *** chewing may impose a greater CVD risk than *** effort is needed in developing betel chewing cessation *** relationship between betel chewing and subgroups of CVD requires further investigation.

关键词： Cardiovascular disease Areca catechu Betel quid Chewing tobacco Relative risk Meta-analysis

Directional Plasmon Filtering in a Two-Dimensional Electron Gas Embedded in High-Index Crystallographic Planes

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2014年第3期31卷 133-136页

作者： CHEN Jian xu Huai-zhe State Key Laboratory of Software Development Environment and Department of Physics Beihang University Belting 100191

We study theoretically the plasmon excitations in a two-dimensional electron gas （2DEG） with spin-orbit interactions （SOIs） embedded in a （11n） crystallographic plane. We demonstrate that the energy spectra and dielectric functions between the 2DEGs embedded in different crystallographic planes can be related by a unitary transformation. Using the unitary transformation, we find that the anisotropy of plasmon excitations and the directional plasmon filtering （DPF） can be tuned by changing the strengths of SOIs in the high-index planes. There are two advantageous directions [110] and [nn2] for plasmon propagation. Moreover, the anisotropy and the DPF can be smeared out by tuning the strength ratio α/β between the Rashba SOI and the Dresselhaus SOI.

关键词： PLASMONS (Physics) RESEARCH ELECTRON gas -- Research SPIN-orbit interactions (Physics) CRYSTALLOGRAPHY PHYSICS research

Investigating Müller glia reprogramming in mice: a retrospective of the last decade, and a look to the future

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

Neural Regeneration Research 2025年第4期20卷 946-959页

作者： Zhiyuan Yin Jiahui Kang xuan Cheng Hui Gao Shujia Huo Haiwei xu Key Lab of Visual Damage and Regeneration&Restoration of Chongqing Southwest Eye HospitalSouthwest HospitalThird Military Medical University(Army Medical University)ChongqingChina

Müller glia,as prominent glial cells within the retina,plays a significant role in maintaining retinal homeostasis in both healthy and diseased *** lower vertebrates like zebrafish,these cells assume responsibility for spontaneous retinal regeneration,wherein endogenous Müller glia undergo proliferation,transform into Müller glia-derived progenitor cells,and subsequently regenerate the entire retina with restored ***,Müller glia in the mouse and human retina exhibit limited neural reprogramming.Müller glia reprogramming is thus a promising strategy for treating neurodegenerative ocular disorders.Müller glia reprogramming in mice has been accomplished with remarkable success,through various *** in molecular,genetic,epigenetic,morphological,and physiological evaluations have made it easier to document and investigate the Müller glia programming process in ***,there remain issues that hinder improving reprogramming efficiency and ***,understanding the reprogramming mechanism is crucial toward exploring factors that will improve Müller glia reprogramming efficiency,and for developing novel Müller glia reprogramming *** review describes recent progress in relatively successful Müller glia reprogramming *** also provides a basis for developing new Müller glia reprogramming strategies in mice,including epigenetic remodeling,metabolic modulation,immune regulation,chemical small-molecules regulation,extracellular matrix remodeling,and cell-cell fusion,to achieve Müller glia reprogramming in mice.

关键词： cell fusion chemical small-molecules epigenetic extracellular matrix immune metabolic mice Müller glia neurodegenerative diseases reprogramming retina regeneration