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Analysis of the relationship between 24-hour sodium and blood pressure and the dietary status based on mobile phone APP in the high-risk population of hypertension in Haikou
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作者 CHEN Jun-cai YAN You-xuan +2 位作者 LIN Liu-ting ZHAO Chan-juan ZHANG Fan 《Journal of Hainan Medical University》 CAS 2023年第10期35-42,共8页
Objective:To understand the dietary intake of high-risk population with hypertension in Haikou,and to analyze the relationship between dietary intake and blood pressure,especially the relationship between sodium intak... Objective:To understand the dietary intake of high-risk population with hypertension in Haikou,and to analyze the relationship between dietary intake and blood pressure,especially the relationship between sodium intake and blood pressure,so as to provide a scientific basis for salt reduction.Methods:A multi-stage cluster sampling 2021 was used from July to December to collect 3-4 cscs from each of the four districts in Haikou.A total of 15 cscs were collected,295 permanent residents aged 55-74 were recruited from 15 community service centers,with 20 eligible subjects from each community.The subjects underwent general physical examination,laboratory tests,and a dietary survey using the self-developed Android phone APP“Nutrition Assistant”(registration number:2021SR1547832).SPSS 21.0 was used 2 for t test,x^(2) test and multiple Regression analysis.Result:In Haikou,69.4%of the subjects had energy intake above energy requirement,and 44.8%had fat intake above the acceptable range of macronutrients.There were only differences in energy,carbohydrate,vitamin B 6 and sodium intake(t=-2.174,-1.990,2.333,-5.442,P=0.031,0.048,0.021,<0.001,respectively).There were significant differences in BMI,family history of chronic diseases,systolic blood 2 pressure and diastolic blood pressure(f value or x^(2) value were 4.260,19.045,139.916,36.864,P value were 0.015,<0.001,<0.001,<0.001,respectively).Multiple Regression analysis analysis showed that 24h sodium excretion was significantly correlated with systolic and diastolic blood pressure(t=12.964,P<0.001),systolic and diastolic blood pressure increased by 0.135 mmhg and 0.068 mmhg,respectively.Conclusion:The dietary intake of the middle-aged and elderly people at high risk of hypertension in the Haikou community was unbalanced,and the intake of sodium salt was strongly correlated with blood pressure,it is necessary to continue to promote salt reduction as one of the key ways to prevent and control hypertension. 展开更多
关键词 DIET Blood pressure high-risk population Sodium salt
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Living with liver disease in the era of COVID-19-the impact of the epidemic and the threat to high-risk populations
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作者 Pranav Barve Prithi Choday +5 位作者 Anphong Nguyen Tri Ly Isha Samreen Sukhwinder Jhooty Chukwuemeka A Umeh Sumanta Chaudhuri 《World Journal of Clinical Cases》 SCIE 2022年第36期13167-13178,共12页
The cardinal symptoms of severe acute respiratory syndrome coronavirus 2 infection as the pandemic began in 2020 were cough,fever,and dyspnea,thus characterizing the virus as a predominantly pulmonary disease.While it... The cardinal symptoms of severe acute respiratory syndrome coronavirus 2 infection as the pandemic began in 2020 were cough,fever,and dyspnea,thus characterizing the virus as a predominantly pulmonary disease.While it is apparent that many patients presenting acutely to the hospital with coronavirus disease 2019(COVID-19)infection have complaints of respiratory symptoms,other vital organs and systems are also being affected.In fact,almost half of COVID-19 hospitalized patients were found to have evidence of some degree of liver injury.Incidence and severity of liver injury in patients with underlying liver disease were even greater.According to the Centers of Disease Control and Prevention,from August 1,2020 to May 31,2022 there have been a total of 4745738 COVID-19 hospital admissions.Considering the gravity of the COVID-19 pandemic and the incidence of liver injury in COVID-19 patients,it is imperative that we as clinicians understand the effects of the virus on the liver and conversely,the effect of underlying hepatobiliary conditions on the severity of the viral course itself.In this article,we review the spectrum of novel studies regarding COVID-19 induced liver injury,compiling data on the effects of the virus in various age and high-risk groups,especially those with preexisting liver disease,in order to obtain a comprehensive understanding of this disease process.We also provide an update of the impact of the new Omicron variant and the changing nature of COVID-19 pathogenesis. 展开更多
关键词 Liver injury Hepatobiliary injury COVID-19 SARS-CoV-2 high-risk populations Liver disease
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Age scope of high-risk population for esophageal cancer in Ci county 被引量:1
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作者 Zhi-FengChen JunHou +6 位作者 Zhen-WeiDing Cui-LanGuo Cui-YunQiao Guo-HuiSong Shao-SenLi Jian-HuiZhang Yu-TongHe 《World Journal of Gastroenterology》 SCIE CAS CSCD 2005年第12期1818-1821,共4页
AIM: To define the age scope of high-risk population for esophageal cancer (EC) in Ci county. METHODS: The results of endoscopic examination of 2 013 subjects, cytological screening of 16 763 persons and records of 9 ... AIM: To define the age scope of high-risk population for esophageal cancer (EC) in Ci county. METHODS: The results of endoscopic examination of 2 013 subjects, cytological screening of 16 763 persons and records of 9 265 patients with EC were analyzed by Ridit methods, the standard age group was 45-49 year group. RESULTS: The average age of patients with moderate esophageal epithelium dysplasia by endoscopic examination was 53.5 years, of severe esophageal epithelium dysplasia, 51.4 years, early EC, 55.6 years. The average age of stage one severe epithelium dysplasia (SEEDⅠ) by cytological screening was 51.2 years, of stage two severe epithelium esophageal dysplasia (SEED Ⅱ) 51.6 years, of advanced EC 61.7 years. In the group of 40-year olds, the value of Ridit by pathological diagnosis was 0.46, 95% CI, 0.45-0.47, that by cytological diagnosis was 0.45, 95% CI, 0.43-0.47. As the age increased at five-year intervals, the value of Ridit increased significantly. CONCLUSION: In Ci county of a high incidence area of EC, the age definition of high-risk population should be above 45 years. 展开更多
关键词 Esophageal cancer high-risk population Age Ridit analysis
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网络民粹主义话语表达的表征、心理根源及其纠偏
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作者 滕国鹏 贾亦真 《南京邮电大学学报(社会科学版)》 2024年第3期50-57,64,共9页
当下,网络民粹主义逐渐演化为一种干扰舆论生态乃至潜移默化影响人们思想观念和现实生活的社会思潮。网络民粹主义话语表达更多表现为社会底层大众表达不满情绪、维护自身利益与话语权的一种显性和常态性的话语抗争。网络民粹主义话语... 当下,网络民粹主义逐渐演化为一种干扰舆论生态乃至潜移默化影响人们思想观念和现实生活的社会思潮。网络民粹主义话语表达更多表现为社会底层大众表达不满情绪、维护自身利益与话语权的一种显性和常态性的话语抗争。网络民粹主义话语表达主要表征为:以泛道德化-道德绑架为主要特点的道德异化,情绪渲染与激进表达下的情感异化,以污名化和标签化为代表的人际交往异化。就其生成的社会心理而言,网络民粹主义话语表达往往与草根网民群体心理相契合。纠偏网络民粹主义话语表达需要从三个方面着手,即话语制衡——一元主导与多元话语协同发展,话语规制——诉求回应与制度约束的“双重保障”,以及话语重塑——以理性认知重构社会认同。 展开更多
关键词 网络民粹主义 网络治理 话语表达 民粹主义
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Development and validation of a prediction model for early screening of people at high risk for colorectal cancer 被引量:2
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作者 Ling-Li Xu Yi Lin +3 位作者 Li-Yuan Han Yue Wang Jian-Jiong Li Xiao-Yu Dai 《World Journal of Gastroenterology》 SCIE CAS 2024年第5期450-461,共12页
BACKGROUND Colorectal cancer(CRC)is a serious threat worldwide.Although early screening is suggested to be the most effective method to prevent and control CRC,the current situation of early screening for CRC is still... BACKGROUND Colorectal cancer(CRC)is a serious threat worldwide.Although early screening is suggested to be the most effective method to prevent and control CRC,the current situation of early screening for CRC is still not optimistic.In China,the incidence of CRC in the Yangtze River Delta region is increasing dramatically,but few studies have been conducted.Therefore,it is necessary to develop a simple and efficient early screening model for CRC.AIM To develop and validate an early-screening nomogram model to identify individuals at high risk of CRC.METHODS Data of 64448 participants obtained from Ningbo Hospital,China between 2014 and 2017 were retrospectively analyzed.The cohort comprised 64448 individuals,of which,530 were excluded due to missing or incorrect data.Of 63918,7607(11.9%)individuals were considered to be high risk for CRC,and 56311(88.1%)were not.The participants were randomly allocated to a training set(44743)or validation set(19175).The discriminatory ability,predictive accuracy,and clinical utility of the model were evaluated by constructing and analyzing receiver operating characteristic(ROC)curves and calibration curves and by decision curve analysis.Finally,the model was validated internally using a bootstrap resampling technique.RESULTS Seven variables,including demographic,lifestyle,and family history information,were examined.Multifactorial logistic regression analysis revealed that age[odds ratio(OR):1.03,95%confidence interval(CI):1.02-1.03,P<0.001],body mass index(BMI)(OR:1.07,95%CI:1.06-1.08,P<0.001),waist circumference(WC)(OR:1.03,95%CI:1.02-1.03 P<0.001),lifestyle(OR:0.45,95%CI:0.42-0.48,P<0.001),and family history(OR:4.28,95%CI:4.04-4.54,P<0.001)were the most significant predictors of high-risk CRC.Healthy lifestyle was a protective factor,whereas family history was the most significant risk factor.The area under the curve was 0.734(95%CI:0.723-0.745)for the final validation set ROC curve and 0.735(95%CI:0.728-0.742)for the training set ROC curve.The calibration curve demonstrated a high correlation between the CRC high-risk population predicted by the nomogram model and the actual CRC high-risk population.CONCLUSION The early-screening nomogram model for CRC prediction in high-risk populations developed in this study based on age,BMI,WC,lifestyle,and family history exhibited high accuracy. 展开更多
关键词 Colorectal cancer Early screening model high-risk population Nomogram model Questionnaire survey Dietary habit Living habit
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老年人在线医疗健康信息获取能力及影响因素研究进展
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作者 王笑露 杨巧菊 +2 位作者 王诗雨 刘文君 王静静 《护理学杂志》 CSCD 北大核心 2024年第11期20-23,共4页
综述老年群体在线医疗健康信息获取能力现状,从人口学、健康状况、健康素养、社会支持、互联网健康服务等方面深入分析老年群体在线医疗健康信息获取能力的影响因素,为制定有效干预措施提高老年群体数字健康信息获取能力提供参考。
关键词 老年人 在线医疗 健康信息获取 健康素养 数字健康 社会支持 互联网 综述文献
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基于大数据分析技术探究互联网时代下打造老年网络社交创作平台的可行性及意义
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作者 崔娅琦 张猛 +2 位作者 王佳越 王苏卿 王本香 《计算机应用文摘》 2024年第6期105-110,共6页
在信息化、数字化与老龄化重叠交汇的时代,老年人成为深受互联网影响的人群之一。互联网时代不仅促进了老年人新型社会交往关系的链接,也为老年人展示自我、结交新朋友创造了条件和机会。从老年人个体来看,在原有家庭、朋友网络之外建... 在信息化、数字化与老龄化重叠交汇的时代,老年人成为深受互联网影响的人群之一。互联网时代不仅促进了老年人新型社会交往关系的链接,也为老年人展示自我、结交新朋友创造了条件和机会。从老年人个体来看,在原有家庭、朋友网络之外建立起的第四社交圈对于缓解老年人的孤独、防止老年人的社会隔离和边缘化具有重要作用。文章利用大数据分析技术,旨在从海量数据中挖掘出有价值的信息,并为老年网络社交创作平台的建设提供有力的支持。 展开更多
关键词 大数据分析技术 老年群体 网络社交创作平台
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在线老年教育促进银发经济的机理与路径
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作者 岳圣元 《天津电大学报》 2024年第2期69-74,共6页
在人口老龄化加速的背景下,如何将人口压力有效转变为银发经济红利,已经成为影响我国经济社会持续健康发展的紧迫问题。在线老年教育是发展银发经济的基础和支撑,从认知、能力、社会三个维度,助力解决银发经济发展中老年人新型消费动力... 在人口老龄化加速的背景下,如何将人口压力有效转变为银发经济红利,已经成为影响我国经济社会持续健康发展的紧迫问题。在线老年教育是发展银发经济的基础和支撑,从认知、能力、社会三个维度,助力解决银发经济发展中老年人新型消费动力不足、老年人力资源开发不足、农村老龄事业发展潜能不足等问题。要以促进银发经济为目标,建好用好老年教育资源共享和公共服务平台,扩大在线老年教育有效供给,破除老年人参与在线老年教育的隐形门槛,加快推动在线老年教育大范围普及和高质量发展。 展开更多
关键词 在线老年教育 银发经济 人口老龄化
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网络民粹主义对当代青年价值观的冲击及应对策略
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作者 夏兴茂 《潍坊工程职业学院学报》 2024年第3期24-29,79,共7页
随着媒介技术的进步,网络空间充斥着反理性、反权威、反精英的民粹主义倾向,网络民粹主义冲击着当代青年的价值观并造成了负面影响,解构了青年主流信仰、荼毒了青年思维方式、诱发了青年不当行为。从其诱发要素上看,主要包括西方互联网... 随着媒介技术的进步,网络空间充斥着反理性、反权威、反精英的民粹主义倾向,网络民粹主义冲击着当代青年的价值观并造成了负面影响,解构了青年主流信仰、荼毒了青年思维方式、诱发了青年不当行为。从其诱发要素上看,主要包括西方互联网意识形态的思想渗透,转型期社会矛盾的加剧、网络空间的复杂失序。鉴于此,应当采取壮大青年主流意识形态教育、倾听青年合理诉求、加强网络空间治理、培育青年网络素养等措施来共同抵御网络民粹主义对青年价值观产生的危害。 展开更多
关键词 网络民粹主义 当代青年 价值观 对策
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保健食品市场现状及其发展趋势分析
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作者 陈耕 范子豪 +1 位作者 姜诗雨 陆佩瑶 《现代食品》 2024年第14期24-26,共3页
近年来,全球及中国保健食品市场均呈现稳步增长态势,这主要得益于消费者健康意识的提升和人口老龄化带来的市场需求增加。本文探讨了保健食品市场规模持续扩大、产品种类不断增补等现状。展望未来,保健食品市场将继续保持高速增长态势,... 近年来,全球及中国保健食品市场均呈现稳步增长态势,这主要得益于消费者健康意识的提升和人口老龄化带来的市场需求增加。本文探讨了保健食品市场规模持续扩大、产品种类不断增补等现状。展望未来,保健食品市场将继续保持高速增长态势,科技创新、个性化定制和绿色可持续发展将成为行业发展的重要方向。 展开更多
关键词 保健食品市场 健康意识 人口老龄化 科技创新 线上线下融合
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Detection of Asymptomatic Carotid Artery Stenosis in High-Risk Individuals of Stroke Using a Machine-Learning Algorithm 被引量:2
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作者 Junxiong Yin Cheng Yu +6 位作者 Lixia Wei Chuanyong Yu Hongxing Liu Mingyang Du Feng Sun Chongjun Wang Xiaoshan Wang 《Chinese Medical Sciences Journal》 CAS CSCD 2020年第4期297-305,共9页
Objective Asymptomatic carotid stenosis(ACS)is closely associated to the incidence of severe cerebrovascular diseases.Early identifying the individuals with ACS and its associated risk factors could be beneficial for ... Objective Asymptomatic carotid stenosis(ACS)is closely associated to the incidence of severe cerebrovascular diseases.Early identifying the individuals with ACS and its associated risk factors could be beneficial for primary prevention of stroke.This study aimed to investigate a machine-learning algorithm for the detection of ACS among high-risk population of stroke based on the associated risk factors.Methods A novel model of machine learning was utilized to screen the associated predictors of ACS based on 30 potential risk factors.The algorithm of this model adopted a random forest pattern based on the training data and then was verified using the testing data.All of the original data were retrieved from the China National Stroke Screening and Prevention Project(CNSSPP),including demographic,clinical and laboratory characteristics.The individuals with high risk of stroke were enrolled and randomly divided into a training group and a testing group at a ratio of 4:1.The identification of carotid stenosis by carotid artery duplex scans was set as the golden standard.The receiver operating characteristic(ROC)curve and the area under the curve(AUC)was used to evaluate the efficacy of the model in detecting ACS.Results Of 2841 high risk individual of stroke enrolled,326(11.6%)were diagnosed as ACS by ultrasonography.The top five risk fectors contributing to ACS in this model were identified as family history of dyslipidemia,high level of lowdensity lipoprotein cholesterol(LDL-c),low level of high-density lipoprotein cholesterol(HDL-c),aging,and low body. 展开更多
关键词 high-risk population STROKE asymptomatic carotid stenosis risk factors machine learning
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Large Population Screening Identified the Main Risk Factors of Stroke in Shashi District of Jingzhou City
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作者 Panpan Zheng Ling Zhang +1 位作者 Rui Sun Xiaoyan Peng 《Yangtze Medicine》 2020年第1期70-78,共9页
Objective: This paper aims to screen and analyze the current status of high-risk stroke patients in Shashi District of Jingzhou City and the exposure levels of related risk factors, and provides suggestions as the ref... Objective: This paper aims to screen and analyze the current status of high-risk stroke patients in Shashi District of Jingzhou City and the exposure levels of related risk factors, and provides suggestions as the references for prevention and treatment of stroke. Methods: Using cluster sampling, on-site investigations were conducted on 1060 permanent residents aged 40 years and over at 3 townships and 2 communities in Shashi District of Jingzhou City from January 2018 to December 2018. Risk assessment of stroke is based on the stroke risk screening form. Statistical analysis was performed by using SPSS 22.0 software. Results: After making a stroke risk assessment, a total of 313 high-risk stroke patients were screened, and the detection rate was 29.53%. The exposure rate of risk factors from high to low was hypertension (70.93%), dyslipidemia (46.33%), less physical exercise (46.01%), diabetes (36.10%), overweight (33.55%), smoking (33.23%), family history of stroke (24.92%), atrial fibrillation or valvular heart disease (7.35%). There are statistically significant differences among all risk factors between the high-risk group and middle and low-risk groups (P Conclusion: The detection rate of high-risk stroke patients in Shashi District of Jingzhou City is high. Hypertension, dyslipidemia and less physical exercise are the main risk factors of stroke occurrence and recurrence in the region. The prevention and treatment of risk factors for stroke should be strengthened to control the incidence and recurrence rate of stroke. 展开更多
关键词 STROKE high-risk population SCREENING Risk Factors
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校园网络超市平台构建分析
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作者 何勰绯 《办公自动化》 2023年第4期22-25,49,共5页
2020年疫情以来,日常购物更多地依赖网络。大学生群体极具消费潜力,其购物方式也逐步趋于网络化。基于此,利用Java技术,在Spring Boot框架基础上,整合MVC后台技术、SQL Server数据库技术、Web前端技术完成校园网络超市平台的设计。平台... 2020年疫情以来,日常购物更多地依赖网络。大学生群体极具消费潜力,其购物方式也逐步趋于网络化。基于此,利用Java技术,在Spring Boot框架基础上,整合MVC后台技术、SQL Server数据库技术、Web前端技术完成校园网络超市平台的设计。平台旨在打破地域、天气等因素限制,为院校师生提供网络购物服务。平台可实现在线购物、二手货品交易等功能,真正做到线上购物,线下配送,快速、便捷。 展开更多
关键词 JAVA技术 校园网络超市平台 在线购物 大学生群体
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SEIR Model of Rumor Spreading in Online Social Network with Varying Total Population Size 被引量:6
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作者 董苏雅拉图 邓燕斌 黄永畅 《Communications in Theoretical Physics》 SCIE CAS CSCD 2017年第10期545-552,共8页
Based on the infectious disease model with disease latency, this paper proposes a new model for the rumor spreading process in online social network. In this paper what we establish an SEIR rumor spreading model to de... Based on the infectious disease model with disease latency, this paper proposes a new model for the rumor spreading process in online social network. In this paper what we establish an SEIR rumor spreading model to describe the online social network with varying total number of users and user deactivation rate. We calculate the exact equilibrium points and reproduction number for this model. Furthermore, we perform the rumor spreading process in the online social network with increasing population size based on the original real world Facebook network. The simulation results indicate that the SEIR model of rumor spreading in online social network with changing total number of users can accurately reveal the inherent characteristics of rumor spreading process in online social network. 展开更多
关键词 online social network rumor spreading model equilibrium point varying population size
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网络政治动员在菲律宾大选中的作用和影响 被引量:1
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作者 霍然 《东南亚研究》 2023年第2期1-17,153,共18页
在埃斯特拉达总统执政末期的“第二次人民力量运动”中,网络政治动员开始影响菲律宾政治,自此之后在菲律宾历次大选中扮演愈发重要的角色。菲律宾人广泛使用社交网络,选民结构呈年轻化趋势,相关的选举法律法规暂未对网络动员行为进行规... 在埃斯特拉达总统执政末期的“第二次人民力量运动”中,网络政治动员开始影响菲律宾政治,自此之后在菲律宾历次大选中扮演愈发重要的角色。菲律宾人广泛使用社交网络,选民结构呈年轻化趋势,相关的选举法律法规暂未对网络动员行为进行规定。在2022年菲律宾大选中,小马科斯团队运用多重手段在“脸书”社交平台打造马科斯家族的亲和形象,并拍摄“油管”、“抖音”视频重新讲述父亲老马科斯统治时期的成就,以建构对自身和家族有利的政治叙事。早在参选之前,小马科斯团队长期采用以社交媒体为主要平台的网络政治动员手段,为其政治回归作铺垫,改变了相当一部分民众的历史认知。网络政治动员本质上是一种政治表演,它根植于菲律宾的政治文化语境,着眼于打造民粹主义话语。在网络民粹主义的影响下,家族政治不再在选举中发挥主流影响力,取而代之的是人气政治。网络让政治动员变得更加简便、高效的同时,也容易让政治宣传流于表面,政治动员走向极端化。 展开更多
关键词 菲律宾 政治选举 网络政治动员 社交媒体 小马科斯 民粹主义
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Social Determinants of Social Zapping:Exploring Predictors of Planned Scheduled Social Events with Others
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作者 Alyssa T.Altieri Joseph R.Ferrari 《Journal of Psychological Research》 2023年第3期29-39,共11页
Social zapping has gained popularity as a term that refers to canceling plans or appointments at the last minute to attend other,supposedly more appealing events.This behavior resembles rapidly switching channels on a... Social zapping has gained popularity as a term that refers to canceling plans or appointments at the last minute to attend other,supposedly more appealing events.This behavior resembles rapidly switching channels on a television,as individuals frequently jump between different social engagements.The present study examined potential behavioral trait predictors of social zapping,such as belongingness,self-esteem,sense of control,and meaningful existence among community residents ranging from 40 to 75 years of age(n=48).The study utilized simple linear regressions to identify potential predictors of social zapping,exploring how the four fundamental needs(belongingness,self-esteem,sense of control,and meaningful existence)might be linked.Results indicated that belongingness and self-esteem are significant predictors of social zapping tendencies.Additionally,an independent samples t-test was conducted to determine the relationship both older and younger adults have with the four fundamental needs as well as the role age plays in social zapping tendencies.Older adults exhibited a significant and more positive association with self-esteem,sense of control,and meaningful existence compared to individuals aged 39 and younger.Social zapping frequency was nonsignificant for both older adults and younger adults.Furthermore,a separate set of linear regression analyses were completed to determine how social desirability affects social zapping across age groups.Social desirability significantly predicted both self-esteem and meaningful existence.Overall,the present study builds on what is currently a new phenomenon in research and will provide new information on the relationship between age,social zapping,and behavioral traits. 展开更多
关键词 Social zapping Four fundamental needs Communicating online Older adult populations Social desirability
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碎片化网络舆情下主流意识形态话语权探析 被引量:21
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作者 王天楠 《中共天津市委党校学报》 北大核心 2020年第1期36-42,共7页
意识形态话语权是社会思潮中引导民心、决定社会舆论走向的能力。网络技术的扩展、网络社会的民粹化走向及个别地方意识形态工作的虚化、弱化、仪式化,导致碎片化网络舆情逐渐占据社会舆情场,甚至出现主流意识形态被碎片化网络舆情“牵... 意识形态话语权是社会思潮中引导民心、决定社会舆论走向的能力。网络技术的扩展、网络社会的民粹化走向及个别地方意识形态工作的虚化、弱化、仪式化,导致碎片化网络舆情逐渐占据社会舆情场,甚至出现主流意识形态被碎片化网络舆情“牵着走”的混乱局面。泛滥的网络舆情催生“鸡毛蒜皮效应”、“长尾效应”“羊群效应”“晕轮效应”和“尺蠖效应”,加剧了主流意识形态丧失话语权的风险。网络时代建构主流意识形态话语权已迫在眉睫,需要增强意识形态吸引力、提高网络空间治理能力、控制舆情事件并进行专业化处理、加强网络舆情有效预判和政策的合理统筹等。 展开更多
关键词 主流意识形态 网络舆情 网民 网络民粹主义
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基于即时学习策略的火电厂球磨机负荷软测量 被引量:4
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作者 张炎欣 王伟 张航 《计算机工程与应用》 CSCD 2012年第7期224-227,230,共5页
针对电厂球磨机负荷难以进行有效预测的问题,从提高预测模型在线自适应能力的角度出发,提出一种基于即时学习策略的改进SVM建模方法。利用灰色关联分析方法对过程参数进行优化筛选,获得辅助变量;在即时学习策略建模框架下,采用多种群混... 针对电厂球磨机负荷难以进行有效预测的问题,从提高预测模型在线自适应能力的角度出发,提出一种基于即时学习策略的改进SVM建模方法。利用灰色关联分析方法对过程参数进行优化筛选,获得辅助变量;在即时学习策略建模框架下,采用多种群混合优化算法进行SVM预测模型参数的优化选取;基于电厂实际运行数据进行了仿真研究。仿真实验表明,与标准BP神经网络和SVM建模方法的比较,该算法具有更好的预测性能,虽然计算开销有所增加,但能够满足制粉系统球磨机负荷检测的实时性要求。 展开更多
关键词 球磨机负荷 在线自适应 即时学习 改进支持向量机 多种群混合优化算法
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基于多源大数据的武汉市区域空间格局研究 被引量:4
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作者 詹庆明 范域立 +3 位作者 罗名海 米子豪 张慧子 张月朦 《上海城市规划》 2019年第3期30-36,共7页
综合多源数据、采用精细方法、分析具体问题,是大数据时代对于城市和区域问题分析提出的新要求。探讨交通格局、区域联系、人口腹地等区域研究中的主要话题在这一背景下的发展方向,利用交通大数据和人口流动大数据表现出的多属性、高密... 综合多源数据、采用精细方法、分析具体问题,是大数据时代对于城市和区域问题分析提出的新要求。探讨交通格局、区域联系、人口腹地等区域研究中的主要话题在这一背景下的发展方向,利用交通大数据和人口流动大数据表现出的多属性、高密度和广覆盖特点,在经典的区域分析模型基础上,提出综合便利度模型、便利度引力模型和势力范围模型。以武汉市为研究对象展开分析,通过一系列多对多指标,揭示武汉市与周边中心城市的不同形式的竞争关系;从东西、远近等不同角度阐述武汉所面对的区域发展机遇。通过研究发现,针对多源大数据的特点设计区域空间格局方法和指标,能更好地梳理和量化对区域问题的理解。 展开更多
关键词 多源大数据 区域空间格局 交通可达性 人口腹地 区域城市联系
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疫情背景下的“数字鸿沟”现象分析 被引量:6
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作者 付华 《数字通信世界》 2020年第10期53-55,共3页
以互联网为代表的信息通信技术在扩散上不均匀是长期客观存在的,新冠疫情的爆发使得人们对互联网的依赖程度严重加剧,不同群体在互联网接入、使用、应用方面的差异被放大凸显,形成了疫情背景下的新"数字鸿沟"现象。
关键词 数字鸿沟 新冠疫情 老龄化 在线教育
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