检索结果-南通市图书馆

Impact of individual behavior adoption heterogeneity on epidemic transmission in multiplex networks

Chinese Physics B 2023年第10期32卷 756-767页

作者：霍良安于跃 Business School University of Shanghai for Science and TechnologyShanghai 200093China

In recent years, the impact of information diffusion and individual behavior adoption patterns on epidemic transmission in complex networks has received significant attention. In the immunization behavior adoption process, different individuals often make behavioral decisions in different ways, and it is of good practical importance to study the influence of individual heterogeneity on the behavior adoption process. In this paper, we propose a three-layer coupled model to analyze the process of co-evolution of official information diffusion, immunization behavior adoption and epidemic transmission in multiplex networks, focusing on individual heterogeneity in behavior adoption patterns. Specifically, we investigate the impact of the credibility of social media and the risk sensitivity of the population on behavior adoption in further study of the effect of heterogeneity of behavior adoption on epidemic transmission. Then we use the microscopic Markov chain approach to describe the dynamic process and capture the evolution of the epidemic threshold. Finally, we conduct extensive simulations to prove our findings. Our results suggest that enhancing the credibility of social media can raise the epidemic transmission threshold, making it effective at controlling epidemic transmission during the dynamic process. In addition, improving an individuals' risk sensitivity, and thus their taking effective protective measures, can also reduce the number of infected individuals and delay the epidemic outbreak. Our study explores the role of individual heterogeneity in behavior adoption in real networks, more clearly models the effect of the credibility of social media and risk sensitivity of the population on the epidemic transmission dynamic, and provides a useful reference for managers to formulate epidemic control and prevention policies.

关键词： multiplex network epidemic transmission behavior

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Business Ecosystem Strategies of Mobile Network Operators in the 3G Era

引用

China Communications 2008年第3期5卷 114-118页

作者： Zhang Jing huo Yumei liang Xiongjian Beijing Univ Posts & Telecommun Sch Econ & Management Beijing 100876 Peoples R China

This paper applies the perspective of business ecosystem to mobile communications industry,trying to help mobile network operators improve their strategies in the era of the third generation mobile communications(3G).According to the definition of the business ecosystem,the ecosystem structure of mobile network operators is *** an important hub in the ecosystem,mobile network operators are advised to take a keystone *** key points of the strategy are ***,suggestions for Chinese mobile network operators are given based on the analysis.

关键词： business ecosystem mobile network operator keystone strategy the third generation mobile communications(3G)

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Clinical features of SARS-CoV-2-associated encephalitis and meningitis amid COVID-19 pandemic

引用

World Journal of Clinical Cases 2021年第5期9卷 1058-1078页

作者： liang huo Kai-Li Xu Hua Wang Department of Pediatrics Shengjing Hospital of China Medical UniversityShenyang 110004Liaoning ProvinceChina Department of Pediatric Neurology Children’s Hospital Affiliated to Zhengzhou UniversityZhengzhou 450018Henan ProvinceChina Department of Pediatric Neurology Henan Children’s HospitalZhengzhou 450018Henan ProvinceChina Department of Pediatric Neurology Shengjing Hospital of China Medical UniversityShenyang 110004Liaoning ProvinceChina

BACKGROUND Since the severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)epidemic,numerous studies have been published on SARS-CoV-2-related encephalitis/meningitis,but it has not been established if there are specific clinical characteristics of encephalitis/meningitis associated with SARS-CoV-2 *** To identify the specific clinical features of cases of encephalitis/meningitis associated with SARS-CoV-2 infection in the context of this virus infection pandemic and investigate their relationship with SARS-CoV-2 *** We searched PubMed,and included single case reports and case series with full text in English,reporting original data of coronavirus disease-19(COVID-19)patients with encephalitis/meningitis and a confirmed recent SARS-CoV-2 *** data were *** We identified 22 articles(18 single case reports and 4 case series)reporting on a total of 32 encephalitis/meningitis patients with confirmed SARS-CoV-2 ***-CoV-2 infection was confirmed through reverse transcriptase-polymerasechain-reaction(RT-PCR)in 96.88%of cases.A total of 22(68.75%)patients had symptoms of SARS-CoV-2 infection in about 1 wk(7.91 d)preceding the onset of neurologic *** most common neurological symptoms were consciousness disturbance(59.38%),seizure(21.88%),delirium(18.75%),and headache(18.75%).Four cases were confirmed by positive RT-PCR results in cerebrospinal fluid(CSF),one was confirmed by positive RT-PCR results in postoperative brain tissue,and one by the presence of SARS-CoV-2 antibodies in *** mainly damaged targets identified by neuroimaging included the temporal lobe(15.63%),white matter(12.5%),frontal lobe(9.38%),corpus callosum(9.38%),and cervical spinal cord(9.38%).Eighty percent of patients had electroencephalograms that showed a diffuse slow ***-eight(87.5%)patients were administered with specific *** majority(65.63%)of patients improved following systemic *** Enceph

关键词： COVID-19 SARS-CoV-2 Encephalitis Meningitis Clinical features System review

来源：

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

Modelling of the In uence of Tool Runout on Surface Generation in Micro Milling

引用

Chinese Journal of Mechanical Engineering 2019年第1期32卷 152-160页

作者： Wanqun chen Yazhou Sun Dehong huo Xiangyu Teng Mechanical Engineering School of Engineering Newcastle University Center for Precision Engineering Harbin Institute of Technology

Micro milling is a flexible and economical method to fabricate micro components with three-dimensional geometry features over a wide range of engineering materials. But the surface roughness and micro topography always limit the performance of the machined micro components. This paper presents a surface generation simulation in micro end milling considering both axial and radial tool runout. Firstly, a surface generation model is established based on the geometry of micro milling cutter. Secondly, the influence of the runout in axial and radial directions on the surface generation are investigated and the surface roughness prediction is realized. It is found that the axial runout has a significant influence on the surface topography generation. Furthermore, the influence of axial runout on the surface micro topography was studied quantitatively, and a critical axial runout is given for variable feed per tooth to generate specific surface topography. Finally, the proposed model is validated by means of experiments and a good correlation is obtained. The proposed surface generation model o ers a basis for designing and optimizing surface parameters of functional machined surfaces.

关键词： Surface generation Roughness prediction Surface topography Runout Micro milling

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Seven New Sesquiterpene Lactones from Eupatorium chinense

引用

Chinese Journal of Chemistry 2005年第11期23卷 1530-1536页

作者： YANG, Sheng-Ping chenG, Jia-Gao huo, Jun JIANG, Hua-liang chen, Kai-Xian YUE, Jian-Min State Key Laboratory of Drug Research Shanghai Institute of Materia Medica Shanghai Institutes for Biological Sciences Chinese Academy of Sciences Zhangjiang Hi-Tech Park Shanghai 201203 China

Seven new sesquiterpenoids, namely eupatochinilides Ⅰ-Ⅶ （1-7）, together with eight known compounds, euponin （8）, mollisorin A （9）, niveusin B （10）, 8β-（4＇-acetoxy-tiglyloxy）-3β-hydroxy-6Hβ,7Hα-germacra-1（10）E,4E,11（13）-trien-6,12-olide （11）, eupalinifide B （12）, 8β-（4＇-hydroxytigloyloxy）-5-desoxy-8-desacyleuparotin （13）, 3-deacetyeupalinin A （14）, and 15-hydroxyleptocarpin （15）, were isolated from the ethanolic extract of the whole plant of Eupatorium chinense L. Their structures and stereochemistry were established by spectroscopic methods and GIAO based ^13C NMR chemical shift calculations.

关键词： Eupatorium chinense sesquiterpenoid eupatochinilides Ⅰ-Ⅶ gauge-independent atomic orbital,quantum chemical calculation

来源：

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

Microstructure transformation of X70 pipeline steel welding heat-affected zone

引用

Rare Metals 2014年第4期33卷 493-498页

作者： Hui Li Jing-Long liang Yun-Li Feng Dong-Xing huo College of Metallurgy and Energy Hebei United University

The continuous cooling transformation curve of heat-affected zone （HAZ） of X70 pipeline steel was mea- sured by Gleeble-3500 thermal mechanical simulator, optical microscope （OM） and hardness analysis. The microstructure transformation rule at different cooling rates and solution behaviors of microalloy carbonitride during heating process of simulated specimens were investigated. When the cooling rate changes from 10 to 20 ℃.s-l, microstructures at HAZ are identified as granular bainite, lathy bainite, and quasi-polygonal ferrite. This micro- structure is featured with fine ferrite grains, martensite/ austenite islands dispersed, high-density dislocations, and fine carbonitride particles, resulting in improving the strength and toughness of HAZ. With the cooling rate increasing to above 40 ℃.s-1, the microstructure is pre- dominantly coarse lathy bainite with clear primary aus- tenite grain boundary. While the cooling rate decreases to below 1 ℃.s-1, a fairly small amount of pearlite can be observed at the boundaries. The strength and toughness of HAZ are deteriorated because of coarse grains among these microstructures. Most of microalloy carbonitrides in HAZ could be dissolved in the matrix during heating process. A few of TiN particles existing as residues in the matrix can prevent austenite grain from growing, and then improve the strength and toughness of HAZ.

关键词： X70 pipeline steel Heat-affected zone Microstructure transformation Acicular ferrite

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Dynamics of a stochastic rumor propagation model incorporating media coverage and driven by Lévy noise

引用

Chinese Physics B 2021年第8期30卷 182-190页

作者： liang-An huo Ya-Fang Dong Ting-Ting Lin Business School University of Shanghai for Science and TechnologyShanghai 200093China School of Electrical and Information Engineering Shanghai Jiao Tong UniversityShanghai 200240China

With the development of information technology,rumors propagate faster and more widely than in the *** this paper,a stochastic rumor propagation model incorporating media coverage and driven by Lévy noise is *** global positivity of the solution process is proved,and further the basic reproductive number R_(0) is *** R_(0)1,the rumor will keep spreading and the system will oscillate randomly near the rumor equilibrium point of the deterministic *** results show that the oscillation amplitude is related to the disturbance of the *** addition,increasing media coverage can effectively reduce the final spread of ***,the above results are verified by numerical simulation.

关键词： rumor propagation stochastic process Lévy jump media coverage

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Priming effect and its regulating factors for fast and slow soil organic carbon pools: A meta-analysis

引用

Pedosphere 2022年第1期32卷 140-148页

作者： Changfu huo Junyi liang Weidong ZHANG Peng WANG Weixin chenG Key Laboratory of Forest Ecology and Management Institute of Applied EcologyChinese Academy of SciencesShenyang 110016China Department of Grassland Resources and Ecology College of Grassland Science and TechnologyChina Agricultural UniversityBeijing 100083China Environmental Studies Department University of CaliforniaSanta Cruz CA 95064USA

The priming effect (PE) plays a critical role in the control of soil carbon (C) cycling and influences the alteration of soil organic C (SOC) decomposition by fresh C ***,drivers of PE for the fast and slow SOC pools remain unclear because of the varying results from individual *** meta-analysis in combination with boosted regression tree (BRT) analysis,we evaluated the relative contribution of multiple drivers of PE with substrate and their patterns across each driver *** results showed that the variability of PE was larger for the fast SOC pool than for the slow SOC *** on the BRT analysis,67%and 34%of the variation in PE were explained for the fast and slow SOC pools,*** were seven determinants of PE for the fast SOC pool,with soil total nitrogen (N) content being the most important,followed by,in a descending order,substrate C:N ratio,soil moisture,soil clay content,soil pH,substrate addition rate,and SOC *** directions of PE were negative when soil total N content and substrate C:N ratio were below 2 g kg~(-1)and 20,respectively,but the directions changed from negative to positive with increasing levels of this two *** with optimal water content (50%–70%of the water-holding capacity) or moderately low pH (5–6) were prone to producing a greater *** the slow SOC pool,soil p H and soil total N content substantially explained the variation in *** magnitude of PE was likely to decrease with increasing soil pH for the slow SOC *** addition,the magnitude of PE slightly fluctuated with soil N content for the slow SOC ***,this meta-analysis provided new insights into the distinctive PEs for different SOC pools and indicated knowledge gaps between PE and its regulating factors for the slow SOC pool.

关键词： boosted regression tree fresh C input recalcitrant carbon soil carbon cycling soil carbon mineralization soil moisture soil nitrogen content soil organic carbon

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

THE GENERALIZED LOWER ORDER OF DIRICHLET SERIES

引用

Acta Mathematica Scientia 2020年第4期40卷 1141-1151页

作者： Qingyuan chen Yingying huo School of Mathematics Guangdong University of TechnologyGuangzhou 510006China

In this paper,we study the generalized lower order of entire functions defined by Dirichlet *** constructing the Newton polygon based on Knopp-Kojima’s formula,we obtain a relation between the coefficients of the Dir... 详细信息

关键词： Dirichlet series Knopp-Kojima method Newton polygon generalized lower order

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Differences Between Solitary Cells and Colonial Cells in the Heteromorphic Life Cycle of Phaeocystis globosa: Morphology, Physiology, and Transcriptome

引用

Journal of Ocean University of China 2021年第4期20卷 939-948页

作者： liang Dayong WANG Xiaodong huo Yiping WANG Yan LI Shaoshan Research Center for Harmful Algae and Marine Biology and Key Laboratory of Eutrophication and Red Tide Prevention of Guangdong Higher Education InstitutesJinan UniversityGuangzhou 510632China Key Laboratory of Ecology and Environmental Science in Guangdong Higher Education School of Life ScienceSouth China Normal UniversityGuangzhou 510631China

Large-scale blooms of Phaeocystis globosa have caused serious damage to marine ecosystems in coastal waters of *** blooms depend on the competitive advantage of their heteromorphic life history:colony formation has the benefit of resisting herbivory by zooplankton,and solitary cells can absorb nutrients *** order to better understand the mechanisms underlying the metabolic differences between the two types of cells,morphological observations,rapid light curve analysis,fatty acid profiling,and transcriptome assessment were conducted in the *** rapid light curve of colonial cells was higher than that of solitary cells,which indicated that colonial cells had higher CO2 fixation *** fatty acid level of colonial cells was evidently lower than that of solitary cells,which is consistent with down-regulated synthesis of fatty acids and up-regulated degradation of fatty acids in the ***-binding cassette transporters,the TCA cycle,and biosynthesis of exopolysaccharides(EPS)also displayed obvious *** summary,colonial cells have stronger carbon fixation *** do not synthesize fatty acids as energy storage materials but secrete EPS,which might be one of the mechanisms of colony *** we present a physiological and molecular overview of the differences between solitary cells and colonial cells and thereby provide further insight to help unravel the mechanisms that help Phaeocystis globosa adapt to different environments.

关键词： Phaeocystis globosa harmful algal bloom heteromorphic life cycle transcriptome

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：