检索结果-南通市图书馆

Constraint-induced movement therapy enhances angiogenesis and neurogenesis after cerebral ischemia/reperfusion

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2019年第10期14卷 1743-1754页

作者： zhi-yong Zhai Juan Feng Department of Neurology Shengjing Hospital of China Medical University

Constraint-induced movement therapy after cerebral ischemia stimulates axonal growth by decreasing expression levels of Nogo-A,RhoA,and Rho-associated kinase(ROCK)in the ischemic boundary ***,it remains unclear if there are any associations between the Nogo-A/RhoA/ROCK pathway and angiogenesis in adult rat brains in pathological processes such as ischemic *** addition,it has not yet been reported whether constraint-induced movement therapy can promote angiogenesis in stroke in adult rats by overcoming Nogo-A/RhoA/ROCK ***,a stroke model was established by middle cerebral artery occlusion and *** days after stroke,the following treatments were initiated and continued for 3 weeks:forced limb use in constraint-induced movement therapy rats(constraint-induced movement therapy group),intraperitoneal infusion of fasudil(a ROCK inhibitor)in fasudil rats(fasudil group),or lateral ventricular injection of NEP1-40(a specific antagonist of the Nogo-66 receptor)in NEP1-40 rats(NEP1-40 group).Immunohistochemistry and western blot assay results showed that,at 2 weeks after middle cerebral artery occlusion,expression levels of RhoA and ROCK were lower in the ischemic boundary zone in rats treated with NEP1-40 compared with rats treated with ischemia/reperfusion or constraint-induced movement therapy ***,at 4 weeks after middle cerebral artery occlusion,expression levels of RhoA and ROCK in the ischemic boundary zone were markedly decreased in the NEP1-40 and constraint-induced movement therapy groups,but there was no difference between these two *** with the ischemia/reperfusion group,modified neurological severity scores and foot fault scores were lower and time taken to locate the platform was shorter in the constraint-induced movement therapy and fasudil groups at 4 weeks after middle cerebral artery occlusion,especially in the constraint-induced movement therapy *** staining demonstrated that fas

关键词： nerve regeneration constraint-induced movement therapy angiogenesis ischemia/reperfusion subventricular zone Nogo-A fasudil neurovascular unit tight junction protein vascular endothelial growth factor receptor 2 neural regeneration

Solving the 2-D Elliptic Monge-Ampère Equation by a Kansa's Method

在线全文

学校读者我要写书评

暂无评论

Acta Mathematicae Applicatae Sinica 2017年第2期33卷 269-276页

作者： Qin LI zhi-yong LIU School of Science Beijing Technology and Business University Beijing 100048 China School of Mathematics and Statistics Ningxia University Yinchuan 750021 China

In this paper, a Kansa＇s method is designed to solve numerically the Monge-Ampere equation. The primitive Kansa＇s method is a meshfree method which applying the combination of some radial basis functions （such as Hardy＇s MQ） to approximate the solution of the linear parabolic, hyperbolic and elliptic problems. But this method is deteriorated when is used to solve nonlinear partial differential equations. We approximate the solution in some local triangular subdomains by using the combination of some cubic polynomials. Then the given problems can be computed in each subdomains independently. We prove the stability and convergence of the new method for the elliptic Monge-Ampere equation. Finally, some numerical experiments are presented to demonstrate the theoretical results.

关键词： radial basis functions Kansa's method Monge-Amp^re equation finite element methods mesh-free methods interpolation

何以必然何以可能:中国式现代化是走和平发展道路的现代化

在线全文

学校读者我要写书评

暂无评论

海南大学学报（人文社会科学版） 2025年第1期43卷 43-50页

作者：李冉郭小凡复旦大学马克思主义学院上海200433

审视中国式现代化走和平发展道路的必然性和可能性,既是诠释中国式现代化内在意蕴的应有之义,也能为回答人类未来何去何从的“世界之问”提供重要参考。这条和平发展道路是在传承中华优秀传统文化中开辟的,蕴含了爱好和平的民族精神;是... 详细信息

审视中国式现代化走和平发展道路的必然性和可能性,既是诠释中国式现代化内在意蕴的应有之义,也能为回答人类未来何去何从的“世界之问”提供重要参考。这条和平发展道路是在传承中华优秀传统文化中开辟的,蕴含了爱好和平的民族精神;是在以西方现代化道路为镜鉴中开辟的,蕴含了自立自强的奋斗精神;是在以马克思主义为价值引领中开辟的,蕴含了不负使命的担当精神;是在进行伟大斗争中开辟的,蕴含了捍卫国家和人类安全的天下情怀。面对“百年未有之大变局”中的新问题与新挑战,这条和平发展道路必将展现出更为深刻的价值。

关键词：走和平发展道路中国式现代化百年未有之大变局

维普期刊数据库博看期刊

Linear Time Algorithms for Parallel Machine Scheduling

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1期23卷 137-146页

作者： zhi Yi TAN yong HE Department of Mathematics State Key Lab of CAD & CG Zhejiang University Hangzhou 310027 P. R. China Department of Mathematics Zhejiang University Hangzhou 310027 P. R. China

This paper addresses linear time algorithms for parallel machine scheduling problems. We introduce a kind of threshold algorithms and discuss their main features. Three linear time threshold algorithm classes DT, PT and DTm are studied thoroughly. For all classes, we study their best possible algorithms among each class. We also present their application to several scheduling problems, The new algorithms are better than classical algorithms in time complexity and/or worst-case ratio. Computer-aided proof technique is used in the proof of main results, which greatly simplifies the proof and decreases case by case analysis.

关键词： scheduling design and analysis of algorithm worst-case ratio computer-aided proof

新农人形象的数字生产研究——基于抖音短视频场域的内容考察

在线全文

学校读者我要写书评

暂无评论

新闻与传播评论 2025年第1期78卷 21-34页

作者：冉华刘沛彤武汉大学媒体发展研究中心、武汉大学新闻与传播学院湖北武汉430072 武汉大学新闻与传播学院湖北武汉430072

随着全面乡村振兴的深入推进,社交媒体在中国乡村的普及不仅大幅缩小了城乡数字鸿沟,更催生城乡数字交往中的新质生产力,塑造新的生产关系与生活样态。基于抖音社交平台,通过对短视频中新农人形象再生产数据的内容分析,可深入考察抖音... 详细信息

随着全面乡村振兴的深入推进,社交媒体在中国乡村的普及不仅大幅缩小了城乡数字鸿沟,更催生城乡数字交往中的新质生产力,塑造新的生产关系与生活样态。基于抖音社交平台,通过对短视频中新农人形象再生产数据的内容分析,可深入考察抖音如何重构城乡交往的整体现状及其形塑过程。研究发现,抖音等新媒体能够催生青年人反哺中老年人一起建立城乡双向奔赴的交往场域。尤其是一批青年新生代农民工,开始从城市返乡,他们积极投身数字乡村建设,通过创意化表演重塑了新农人形象。这种行为充分肯定返乡生活并重新定义乡村身份,在中国交往场域实践中占据核心地位。在这一过程中,抖音作为技术与社会互动的中介,在视频内容展演上具有历时性维度和包容特性,并成为跨越城乡鸿沟、促进城乡互动的重要传播特征。此外,抖音等社交媒体用户,通过在视频里扮演中介角色再生产出数字时代的中国城乡社会网络交往媒介,在构建积极城乡交往的媒介形象以及搭建新传播体系方面提供实践方式与理论指引。

关键词：新质生产力城乡鸿沟新农人抖音社交平台交往场域

Gastrointestinal symptoms in patients undergoing peritoneal dialysis: Multivariate analysis of correlated factors

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2010年第22期16卷 2812-2817页

作者： Dong, Rui Guo, zhi-yong Second Mil Med Univ Changhai Hosp Dept Nephrol Shanghai 200433 Peoples R China

AIM: To investigate gastrointestinal (GI) symptoms in peritoneal dialysis (PD) patients and to explore related factors contributing to GI symptoms. METHODS: One hundred and twelve patients undergoing PD participated in the study. The gastrointestinal symptom rating scale was used for measuring GI symptoms. Information on age, height, weight, body mass index, disease leading to chronic renal failure, history of corticosteroid therapy, presence of predialytic GI symptoms, daily dosage of pills, and duration, type and daily dialysate volume of PD was obtained by interviewing patients and/or reviewing the medical records. Hemoglobin, albumin and Kt/V data were obtained from follow-up database. We used multiple regression analysis with stepwise backward variable selection to test for factors predicting GSRS scores with significance level of selection entry at 0.05 and selection of stay at 0.10. RESULTS: The prevalence of eating dysfunction, reflux and indigestion in the PD patients was 44.2%, 32.7%,32.7%, respectively. A history of corticosteroid therapy (b = 8.93, P 0.05. CONCLUSION: Eating dysfunction, reflux and indigestion were common in PD patients. Daily dosage of pills and corticosteroid history predicted GI symptoms, while residual renal function prevented them.

关键词： Eating dysfunction Gastroesophageal reflux Dyspepsia Peritoneal dialysis Residual renal function

The boundedness for commutators of maximal hypersingular integrals with rough kernels

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

Science China Mathematics 2013年第4期56卷 707-728页

作者： CHEN YanPing DING yong LI ran Department of Applied Mathematics University of Science and Technology Beijing School of Mathematical Sciences Beijing Normal University Laboratory of Mathematics and Complex Systems(BNU) Ministry of Education

In this paper,we prove that the commutators of maximal hypersingular integrals with rough kernels are bounded from the Sobolev space Lpγ(Rn) to the Lebesgue space Lp(Rn),which is a substantial improvement and an exte... 详细信息

关键词： commutator maximal hypersingular integrals rough kernel BMO sobolev space

Normalized Solution for p-Kirchhoff Equation with a L2-supercritical Growth

在线全文

学校读者我要写书评

暂无评论

Acta Mathematicae Applicatae Sinica 2024年第2期40卷 414-429页

作者： zhi-min REN yong-yi LAN School of Sciences Jimei UniversityXiamen 361005China

In this paper,we investigate the following p-Kirchhoff equation{∫R^(N)|u|^(2)dx=ρ,(a+b)∫RN(|Δu}^(p)+|u|^(p))dx)(-Δpu+|u|^(p-2u)=|u|^(s-2)u+μu,x∈R^(N),where a>0,b≥0,p>0 are constants,constants,p*=N-P/Np is the ... 详细信息

关键词： p-Kirchhoff equation normalized solution mountain-pass lemma

IBEA-SVM: An Indicator-based Evolutionary Algorithm Based on Pre-selection with Classification Guided by SVM

在线全文

学校读者我要写书评

暂无评论

Applied Mathematics(A Journal of Chinese Universities) 2019年第1期34卷 1-26页

作者： LI Hao-ran HE Fa-zhi YAN Xiao-hu School of Computer Science and Technology Wuhan University State Key Laboratory of Digital Manufacturing Equipment and Technology Huazhong University

Multi-objective optimization has many important applications and becomes a challenging issue in applied science. In typical multi-objective optimization algorithms, such as Indicator-based Evolutionary Algorithm(IBEA), all of parents and offspring need to be evaluated in every generation, and then the better solutions of them are selected as the next generation candidates. This leads to a large amount of calculation and slows down convergence rate for IBEA related applications. Our discovery is that the evaluation of evolutionary algorithm is a binary classi?cation in nature and a meaningful preselection method will accelerate the convergence rate. Therefore this paper presents a novel preselection approach to improve the performance of the IBEA, in which a SVM(Support Vector Machine) classi?er is adopted to sort the promising solutions from unpromising solutions and then the newly generated solutions are conversely added as train sample to increase the accuracy of the classi?er. Firstly, we proposed an online and asynchronous training method for SVM model with empirical kernel. The initial population is randomly generated among population size, which is used as initial training. In the process of training, SVM classi?er is modi?ed and perfected to adapt to the evolutionary algorithm sample. Secondly, the classi?er divides all the new generated solutions from the whole solution spaces into promising solutions and unpromising ones. And only the promising ones are forwarded for evaluation. In this way, the evaluation time can be greatly reduced and the solution quality can be obviously improved. Thirdly, the promising and unpromising solutions are labeled as new train samples in next generation to re?ne classi?er model. A number of experiments on benchmark functions validates the proposed approach. The results show that IBEA-SVM can signi?cantly outperform previous works.

关键词： multi-objective optimization SVM IBEA training classification