On Apr.15th,2024,National Medical Products Administration released a popular science article about using sunscreen“spray”cosmetics safely,reminding consumers to care about how to use sunscreen“spray”cosmetics corr...On Apr.15th,2024,National Medical Products Administration released a popular science article about using sunscreen“spray”cosmetics safely,reminding consumers to care about how to use sunscreen“spray”cosmetics correctly.According to the article,common sunscreen“spray”in the market can be divided into spray type and aerosol type,and incorrect use of them will cause the risk of inhalation or flammability.To use sunscreen“spray”cosmetics correctly,one should try to avoid inhaling“spray”;put the sunscreen“spray”in a cool,dry and ventilated environment not exposed to direct sunlight,and avoid using them on wounds,redness&swelling,eczema or other abnormal places of the skin.展开更多
Currently, the number of myopic people in China has reached as high as 600 million, and it shows a trend of “early onset, high incidence, and a high degree of severity”. The issue of myopia among children and adoles...Currently, the number of myopic people in China has reached as high as 600 million, and it shows a trend of “early onset, high incidence, and a high degree of severity”. The issue of myopia among children and adolescents has attracted widespread attention from all sectors of society. Comprehensive myopia prevention and control efforts have been launched nationwide. Popular science education, vision screening, and improving visual environments are effective measures for preventing myopia. However, among the target audience for comprehensive myopia prevention and control, the preschool children group has been neglected, and the work of myopia prevention and control for this group has been significantly weakened and marginalized. Due to insufficient awareness of prevention and control, the hyperopia reserve in the preschool children group is being continuously depleted, leading to the early onset of myopia. In light of this situation, the focus of myopia prevention and control needs to shift forward, and it is worth exploring and pondering how college students with a background in optometry can develop entertaining and engaging popular science education materials and methods.展开更多
The traditional method of doing business has been disrupted by socialmedia. In order to develop the enterprise, it is essential to forecast the level ofinteraction that a new post would receive from social media users...The traditional method of doing business has been disrupted by socialmedia. In order to develop the enterprise, it is essential to forecast the level ofinteraction that a new post would receive from social media users. It is possiblefor the user’s interest in any one social media post to be impacted by external factors or to dwindle as a result of changes in his behaviour. The popularity detectionstrategies that are user-based or population-based are unable to keep up with theseshifts, which leads to inaccurate forecasts. This work makes a prediction abouthow popular the post will be and addresses any anomalies caused by factors outside of the study. A novel improved PARAFAC (A-PARAFAC) method that istensor factorization-based has been presented in order to cope with the user criteria that will be used in the future to rate any project. We consolidated the information on the historically popular content, and we accelerated the computation bychoosing the top contents that were most like each other. The tensor is factorisedwith the application of the Adam optimization. It has been modified such that thebias is now included in the gradient function of A-PARAFAC, and the value ofthe bias is updated after each iteration. The prediction accuracy is improved by32.25% with this strategy compared to other state of the art methods.展开更多
Predicting the popularity of online news is essential for news providers and recommendation systems.Time series,content and meta-feature are important features in news popularity prediction.However,there is a lack of ...Predicting the popularity of online news is essential for news providers and recommendation systems.Time series,content and meta-feature are important features in news popularity prediction.However,there is a lack of exploration of how to integrate them effectively into a deep learning model and how effective and valuable they are to the model’s performance.This work proposes a novel deep learning model named Multiple Features Dynamic Fusion(MFDF)for news popularity prediction.For modeling time series,long short-term memory networks and attention-based convolution neural networks are used to capture long-term trends and short-term fluctuations of online news popularity.The typical convolution neural network gets headline semantic representation for modeling news headlines.In addition,a hierarchical attention network is exploited to extract news content semantic representation while using the latent Dirichlet allocation model to get the subject distribution of news as a semantic supplement.A factorization machine is employed to model the interaction relationship between metafeatures.Considering the role of these features at different stages,the proposed model exploits a time-based attention fusion layer to fuse multiple features dynamically.During the training phase,thiswork designs a loss function based on Newton’s cooling law to train the model better.Extensive experiments on the real-world dataset from Toutiao confirm the effectiveness of the dynamic fusion of multiple features and demonstrate significant performance improvements over state-of-the-art news prediction techniques.展开更多
El Salvador established diplomatic relationship with China in 2018,opening a new chapter in the history of bilateral relations.Since the establishment of the diplomatic relationship,bilateral relations have been growi...El Salvador established diplomatic relationship with China in 2018,opening a new chapter in the history of bilateral relations.Since the establishment of the diplomatic relationship,bilateral relations have been growing steadily,with frequent reciprocal visits of high-ranking officials between the two countries.The cooperation has achieved fruitful results in the realms of politics,trade,the economy and cultural humanities.展开更多
In recent years,Chinese auto companies have frequently expanded their businesses in Southeast Asian markets such as Indonesia,Vietnam,Thailand,and Malaysia,relying on their first-mover advantages in the new energy sec...In recent years,Chinese auto companies have frequently expanded their businesses in Southeast Asian markets such as Indonesia,Vietnam,Thailand,and Malaysia,relying on their first-mover advantages in the new energy sector.Many of their vehicle models have become highly popular among local people.展开更多
Urban geopark is the backyard garden of urban residents’life.Geological landscape popular science exhibition enables people to receive geological popular science knowledge easily and happily while playing,which will ...Urban geopark is the backyard garden of urban residents’life.Geological landscape popular science exhibition enables people to receive geological popular science knowledge easily and happily while playing,which will virtually strengthen people’s protection awareness of urban geological landscape.Urban geopark landscape is featured by unique typical geological characteristics.It is a realistic problem that troubles the planning and design of geological landscape popular science exhibition in urban geopark by effectively protecting these geological landscapes and upgrading them into urban popular science leisure tourism resources.Taking Zhengzhou Yellow River National Geopark as an example,this paper systematically studies the planning and design of geological landscape popular science exhibition in urban geopark.展开更多
With the rapid development of networks,users are increasingly seeking richer and high-quality content experience,and there is an urgent need to develop efficient content caching strategies to improve the content distr...With the rapid development of networks,users are increasingly seeking richer and high-quality content experience,and there is an urgent need to develop efficient content caching strategies to improve the content distribution efficiency of caching.Therefore,it will be an effective solution to combine content popularity prediction based on machine learning(ML)and content caching to enable the network to predict and analyze popular content.However,the data sets which contain users’private data cause the risk of privacy leakage.In this paper,to address this challenge,we propose a privacy-preserving algorithm based on federated learning(FL)and long short-term memory(LSTM),which is referred to as FL-LSTM,to predict content popularity.Simulation results demonstrate that the performance of the proposed algorithm is close to the centralized LSTM and better than other benchmark algorithms in terms of privacy protection.Meanwhile,the caching policy in this paper raises about 14.3%of the content hit rate.展开更多
The arrival of the Chinese tour group in Singapore with the sincere friendship between China and Singapore after the outbreak of COVID-19 marked the comprehensive recovery of people-to-people and cultural exchanges be...The arrival of the Chinese tour group in Singapore with the sincere friendship between China and Singapore after the outbreak of COVID-19 marked the comprehensive recovery of people-to-people and cultural exchanges between the two countries and the new start of China-Singapore cooperation after three years of development.展开更多
Genshin Impact and Uma Musume:Pretty Derby are two of the hottest mobile games in China and Japan,respectively,in the past two years,both of which have gained enormous popularity and revenue in their home countries.Th...Genshin Impact and Uma Musume:Pretty Derby are two of the hottest mobile games in China and Japan,respectively,in the past two years,both of which have gained enormous popularity and revenue in their home countries.This paper focuses on the cross-cultural perspective,and analyzes the differences between the two games and their reasons for their popularity from three aspects:character design,cultural background,and game genre.展开更多
Over the past two decades,dialogic accounting research has evolved into a distinct field,expanding into what is now recognized as critical dialogic accounting and accountability(CDAA).The integration of critical dialo...Over the past two decades,dialogic accounting research has evolved into a distinct field,expanding into what is now recognized as critical dialogic accounting and accountability(CDAA).The integration of critical dialogic accounting and accountability acknowledges the growing need to recognize diverse pathways within accounting practices,emphasizing the representation of marginalized perspectives,engagement with power dynamics,and the analysis of conflicts,particularly in the context of societal and environmental impacts.Based on these assumptions,the Integrated Popular Reporting(IPR)is intended as a useful practical dialogic tool designed to impartially represent the viewpoints of different stakeholders.The focus extends beyond traditional dialogic accounting,integrating a newer critical lens that explores the implications of digital technology in the reporting process.To explore these advancements,the study investigates the implementation of the City of Bari’s 2020 Integrated Popular Reporting.Leveraging tools such as Talkwalker and employing a longitudinal,interventionist approach along with semi-structured interviews,the study assesses the effects of digital technologies on the dialogic accounting process.The analysis shows that the use of digital technologies has facilitated a more participatory reporting structure,evident in increased citizen engagement and reduced bureaucratic hurdles.Notably,it has enhanced the accuracy of defining citizens’informational needs and addressed pertinent themes ranging from mobility,economy,digitization,regeneration,and employment.Moreover,it underscores the need to address the digital divide and ensure inclusivity across diverse demographics.Ultimately,it contributes to the ongoing discourse on the role of technology in shaping the future of dialogic accounting and its broader implications for societal accountability.展开更多
Wushu,or Chinese martial arts,is set to make its Olympic debut in the Youth Olympic Games 2026 in Dakar,the first Olympic competition to be staged in Africa.Wushu,which featured at the All-Africa Youth Games in 2018,h...Wushu,or Chinese martial arts,is set to make its Olympic debut in the Youth Olympic Games 2026 in Dakar,the first Olympic competition to be staged in Africa.Wushu,which featured at the All-Africa Youth Games in 2018,has gone through a tortuous process in being accepted as an Olympic sport event.The International Wushu Federation(IWUF)first submitted applications for inclusion to the International Olympic Committee in 2001,followed by two more failed bids in 2008 and 2011.Finally,it tasted success in Africa,which is also a testament to its popularity in the continent.展开更多
Tourism is one of the important areas of the Belt and Road exchange and cooperation.Since China proposed the Belt and Road Initiative(BRI)in 2013,the tourism exchanges between BRI partner countries have been close and...Tourism is one of the important areas of the Belt and Road exchange and cooperation.Since China proposed the Belt and Road Initiative(BRI)in 2013,the tourism exchanges between BRI partner countries have been close and the cooperation has achieved remarkable results.With the accelerated recovery of China's outbound travel market this year,BRI partner countries are becoming popular destinations for Chinese tourists.展开更多
Ethiopia opens state-of-the-art science museum to promote technology and innovation Ethiopia has inaugurated Africa’s first ever multipurpose science museum in the capital Addis Ababa,with an aim of creating a centre...Ethiopia opens state-of-the-art science museum to promote technology and innovation Ethiopia has inaugurated Africa’s first ever multipurpose science museum in the capital Addis Ababa,with an aim of creating a centre of excellence for innovation.The Chinese government-aided state-of-the-art science museum,the Ethiopia Museum of Art and Science,is part of the country’s digital transformation and development endeavours.展开更多
In this paper,we explore a distributed collaborative caching and computing model to support the distribution of adaptive bit rate video streaming.The aim is to reduce the average initial buffer delay and improve the q...In this paper,we explore a distributed collaborative caching and computing model to support the distribution of adaptive bit rate video streaming.The aim is to reduce the average initial buffer delay and improve the quality of user experience.Considering the difference between global and local video popularities and the time-varying characteristics of video popularity,a two-stage caching scheme is proposed to push popular videos closer to users and minimize the average initial buffer delay.Based on both long-term content popularity and short-term content popularity,the proposed caching solution is decouple into the proactive cache stage and the cache update stage.In the proactive cache stage,we develop a proactive cache placement algorithm that can be executed in an off-peak period.In the cache update stage,we propose a reactive cache update algorithm to update the existing cache policy to minimize the buffer delay.Simulation results verify that the proposed caching algorithms can reduce the initial buffer delay efficiently.展开更多
The emergence of various new services has posed a huge challenge to the existing network architecture.To improve the network delay and backhaul pressure,caching popular contents at the edge of network has been conside...The emergence of various new services has posed a huge challenge to the existing network architecture.To improve the network delay and backhaul pressure,caching popular contents at the edge of network has been considered as a feasible scheme.However,how to efficiently utilize the limited caching resources to cache diverse contents has been confirmed as a tough problem in the past decade.In this paper,considering the time-varying user requests and the heterogeneous content sizes,a user preference aware hierarchical cooperative caching strategy in edge-user caching architecture is proposed.We divide the caching strategy into three phases,that is,the content placement,the content delivery and the content update.In the content placement phase,a cooperative content placement algorithm for local content popularity is designed to cache contents proactively.In the content delivery phase,a cooperative delivery algorithm is proposed to deliver the cached contents.In the content update phase,a content update algorithm is proposed according to the popularity of the contents.Finally,the proposed caching strategy is validated using the MovieLens dataset,and the results reveal that the proposed strategy improves the delay performance by at least 35.3%compared with the other three benchmark strategies.展开更多
As China’s association with the outside world is increaing, young people today are more and more exposed to popular culture which comes from the wert, popular culture has become part of their daily lives. In this art...As China’s association with the outside world is increaing, young people today are more and more exposed to popular culture which comes from the wert, popular culture has become part of their daily lives. In this article, l’ll look into the elements of poprlar culture and the are of populan culture in English teaching and learning.展开更多
Popular word on line is a kind of language form which is welcomed by netizens.The popular word on line is the most active part of network language.They are made of expressions what the internet users are established b...Popular word on line is a kind of language form which is welcomed by netizens.The popular word on line is the most active part of network language.They are made of expressions what the internet users are established by usage.The popular words on line have a very strong nature of medium.They are the comprehensive products which come from the facts of social politics,economics,culture,environment and people's psychological activities etc.of a certain time.The total amount of new emerging popular words on line is not so many every year,but the influence of them can not be belittled.This study focuses on the popular words on line with the cases of the popular words occured in recent years.It works on the reasons for their rapid spreading.The author summarizes their characteristics and put forward some ways for the guidance of the popular words on line.展开更多
In China,there are 544,000 sudden deaths each year.Cardiac arrest is one of the most common causes of sudden death,and 70%of cardiac arrests occur outside the hospital.[1,2]However,fewer than 1%of bystanders at cardia...In China,there are 544,000 sudden deaths each year.Cardiac arrest is one of the most common causes of sudden death,and 70%of cardiac arrests occur outside the hospital.[1,2]However,fewer than 1%of bystanders at cardiac arrest deaths in China are well-trained and capable of administering first aid.[3]Therefore,it is urgent to popularize first-aid knowledge in the Chinese population.展开更多
文摘On Apr.15th,2024,National Medical Products Administration released a popular science article about using sunscreen“spray”cosmetics safely,reminding consumers to care about how to use sunscreen“spray”cosmetics correctly.According to the article,common sunscreen“spray”in the market can be divided into spray type and aerosol type,and incorrect use of them will cause the risk of inhalation or flammability.To use sunscreen“spray”cosmetics correctly,one should try to avoid inhaling“spray”;put the sunscreen“spray”in a cool,dry and ventilated environment not exposed to direct sunlight,and avoid using them on wounds,redness&swelling,eczema or other abnormal places of the skin.
文摘Currently, the number of myopic people in China has reached as high as 600 million, and it shows a trend of “early onset, high incidence, and a high degree of severity”. The issue of myopia among children and adolescents has attracted widespread attention from all sectors of society. Comprehensive myopia prevention and control efforts have been launched nationwide. Popular science education, vision screening, and improving visual environments are effective measures for preventing myopia. However, among the target audience for comprehensive myopia prevention and control, the preschool children group has been neglected, and the work of myopia prevention and control for this group has been significantly weakened and marginalized. Due to insufficient awareness of prevention and control, the hyperopia reserve in the preschool children group is being continuously depleted, leading to the early onset of myopia. In light of this situation, the focus of myopia prevention and control needs to shift forward, and it is worth exploring and pondering how college students with a background in optometry can develop entertaining and engaging popular science education materials and methods.
文摘The traditional method of doing business has been disrupted by socialmedia. In order to develop the enterprise, it is essential to forecast the level ofinteraction that a new post would receive from social media users. It is possiblefor the user’s interest in any one social media post to be impacted by external factors or to dwindle as a result of changes in his behaviour. The popularity detectionstrategies that are user-based or population-based are unable to keep up with theseshifts, which leads to inaccurate forecasts. This work makes a prediction abouthow popular the post will be and addresses any anomalies caused by factors outside of the study. A novel improved PARAFAC (A-PARAFAC) method that istensor factorization-based has been presented in order to cope with the user criteria that will be used in the future to rate any project. We consolidated the information on the historically popular content, and we accelerated the computation bychoosing the top contents that were most like each other. The tensor is factorisedwith the application of the Adam optimization. It has been modified such that thebias is now included in the gradient function of A-PARAFAC, and the value ofthe bias is updated after each iteration. The prediction accuracy is improved by32.25% with this strategy compared to other state of the art methods.
文摘Predicting the popularity of online news is essential for news providers and recommendation systems.Time series,content and meta-feature are important features in news popularity prediction.However,there is a lack of exploration of how to integrate them effectively into a deep learning model and how effective and valuable they are to the model’s performance.This work proposes a novel deep learning model named Multiple Features Dynamic Fusion(MFDF)for news popularity prediction.For modeling time series,long short-term memory networks and attention-based convolution neural networks are used to capture long-term trends and short-term fluctuations of online news popularity.The typical convolution neural network gets headline semantic representation for modeling news headlines.In addition,a hierarchical attention network is exploited to extract news content semantic representation while using the latent Dirichlet allocation model to get the subject distribution of news as a semantic supplement.A factorization machine is employed to model the interaction relationship between metafeatures.Considering the role of these features at different stages,the proposed model exploits a time-based attention fusion layer to fuse multiple features dynamically.During the training phase,thiswork designs a loss function based on Newton’s cooling law to train the model better.Extensive experiments on the real-world dataset from Toutiao confirm the effectiveness of the dynamic fusion of multiple features and demonstrate significant performance improvements over state-of-the-art news prediction techniques.
文摘El Salvador established diplomatic relationship with China in 2018,opening a new chapter in the history of bilateral relations.Since the establishment of the diplomatic relationship,bilateral relations have been growing steadily,with frequent reciprocal visits of high-ranking officials between the two countries.The cooperation has achieved fruitful results in the realms of politics,trade,the economy and cultural humanities.
文摘In recent years,Chinese auto companies have frequently expanded their businesses in Southeast Asian markets such as Indonesia,Vietnam,Thailand,and Malaysia,relying on their first-mover advantages in the new energy sector.Many of their vehicle models have become highly popular among local people.
基金Sponsored by Special Cultural Research Project of Xing Culture Engineering of Henan Province(2022XWH132).
文摘Urban geopark is the backyard garden of urban residents’life.Geological landscape popular science exhibition enables people to receive geological popular science knowledge easily and happily while playing,which will virtually strengthen people’s protection awareness of urban geological landscape.Urban geopark landscape is featured by unique typical geological characteristics.It is a realistic problem that troubles the planning and design of geological landscape popular science exhibition in urban geopark by effectively protecting these geological landscapes and upgrading them into urban popular science leisure tourism resources.Taking Zhengzhou Yellow River National Geopark as an example,this paper systematically studies the planning and design of geological landscape popular science exhibition in urban geopark.
基金This work is supported in part by the National Natural Science Founda⁃tion of China(NSFC)under Grant No.62001387in part by the Young Elite Scientists Sponsorship Program by the China Association for Science and Technology(CAST)under Grant No.2022QNRC001in part by Shanghai Academy of Spaceflight Technology(SAST)under Grant No.SAST2022052.
文摘With the rapid development of networks,users are increasingly seeking richer and high-quality content experience,and there is an urgent need to develop efficient content caching strategies to improve the content distribution efficiency of caching.Therefore,it will be an effective solution to combine content popularity prediction based on machine learning(ML)and content caching to enable the network to predict and analyze popular content.However,the data sets which contain users’private data cause the risk of privacy leakage.In this paper,to address this challenge,we propose a privacy-preserving algorithm based on federated learning(FL)and long short-term memory(LSTM),which is referred to as FL-LSTM,to predict content popularity.Simulation results demonstrate that the performance of the proposed algorithm is close to the centralized LSTM and better than other benchmark algorithms in terms of privacy protection.Meanwhile,the caching policy in this paper raises about 14.3%of the content hit rate.
文摘The arrival of the Chinese tour group in Singapore with the sincere friendship between China and Singapore after the outbreak of COVID-19 marked the comprehensive recovery of people-to-people and cultural exchanges between the two countries and the new start of China-Singapore cooperation after three years of development.
文摘Genshin Impact and Uma Musume:Pretty Derby are two of the hottest mobile games in China and Japan,respectively,in the past two years,both of which have gained enormous popularity and revenue in their home countries.This paper focuses on the cross-cultural perspective,and analyzes the differences between the two games and their reasons for their popularity from three aspects:character design,cultural background,and game genre.
文摘Over the past two decades,dialogic accounting research has evolved into a distinct field,expanding into what is now recognized as critical dialogic accounting and accountability(CDAA).The integration of critical dialogic accounting and accountability acknowledges the growing need to recognize diverse pathways within accounting practices,emphasizing the representation of marginalized perspectives,engagement with power dynamics,and the analysis of conflicts,particularly in the context of societal and environmental impacts.Based on these assumptions,the Integrated Popular Reporting(IPR)is intended as a useful practical dialogic tool designed to impartially represent the viewpoints of different stakeholders.The focus extends beyond traditional dialogic accounting,integrating a newer critical lens that explores the implications of digital technology in the reporting process.To explore these advancements,the study investigates the implementation of the City of Bari’s 2020 Integrated Popular Reporting.Leveraging tools such as Talkwalker and employing a longitudinal,interventionist approach along with semi-structured interviews,the study assesses the effects of digital technologies on the dialogic accounting process.The analysis shows that the use of digital technologies has facilitated a more participatory reporting structure,evident in increased citizen engagement and reduced bureaucratic hurdles.Notably,it has enhanced the accuracy of defining citizens’informational needs and addressed pertinent themes ranging from mobility,economy,digitization,regeneration,and employment.Moreover,it underscores the need to address the digital divide and ensure inclusivity across diverse demographics.Ultimately,it contributes to the ongoing discourse on the role of technology in shaping the future of dialogic accounting and its broader implications for societal accountability.
文摘Wushu,or Chinese martial arts,is set to make its Olympic debut in the Youth Olympic Games 2026 in Dakar,the first Olympic competition to be staged in Africa.Wushu,which featured at the All-Africa Youth Games in 2018,has gone through a tortuous process in being accepted as an Olympic sport event.The International Wushu Federation(IWUF)first submitted applications for inclusion to the International Olympic Committee in 2001,followed by two more failed bids in 2008 and 2011.Finally,it tasted success in Africa,which is also a testament to its popularity in the continent.
文摘Tourism is one of the important areas of the Belt and Road exchange and cooperation.Since China proposed the Belt and Road Initiative(BRI)in 2013,the tourism exchanges between BRI partner countries have been close and the cooperation has achieved remarkable results.With the accelerated recovery of China's outbound travel market this year,BRI partner countries are becoming popular destinations for Chinese tourists.
文摘Ethiopia opens state-of-the-art science museum to promote technology and innovation Ethiopia has inaugurated Africa’s first ever multipurpose science museum in the capital Addis Ababa,with an aim of creating a centre of excellence for innovation.The Chinese government-aided state-of-the-art science museum,the Ethiopia Museum of Art and Science,is part of the country’s digital transformation and development endeavours.
基金the National Natural Science Foundation of China under grants 61901078,61871062,and U20A20157in part by the China University Industry-University-Research Collaborative Innovation Fund(Future Network Innovation Research and Application Project)under grant 2021FNA04008+5 种基金in part by the China Postdoctoral Science Foundation under grant 2022MD713692in part by the Chongqing Postdoctoral Science Special Foundation under grant 2021XM2018in part by the Natural Science Foundation of Chongqing under grant cstc2020jcyj-zdxmX0024in part by University Innovation Research Group of Chongqing under grant CXQT20017in part by the Science and Technology Research Program of Chongqing Municipal Education Commission under Grant KJQN202000626in part by the Youth Innovation Group Support Program of ICE Discipline of CQUPT under grant SCIE-QN-2022-04.
文摘In this paper,we explore a distributed collaborative caching and computing model to support the distribution of adaptive bit rate video streaming.The aim is to reduce the average initial buffer delay and improve the quality of user experience.Considering the difference between global and local video popularities and the time-varying characteristics of video popularity,a two-stage caching scheme is proposed to push popular videos closer to users and minimize the average initial buffer delay.Based on both long-term content popularity and short-term content popularity,the proposed caching solution is decouple into the proactive cache stage and the cache update stage.In the proactive cache stage,we develop a proactive cache placement algorithm that can be executed in an off-peak period.In the cache update stage,we propose a reactive cache update algorithm to update the existing cache policy to minimize the buffer delay.Simulation results verify that the proposed caching algorithms can reduce the initial buffer delay efficiently.
基金supported by Natural Science Foundation of China(Grant 61901070,61801065,62271096,61871062,U20A20157 and 62061007)in part by the Science and Technology Research Program of Chongqing Municipal Education Commission(Grant KJQN202000603 and KJQN201900611)+3 种基金in part by the Natural Science Foundation of Chongqing(Grant CSTB2022NSCQMSX0468,cstc2020jcyjzdxmX0024 and cstc2021jcyjmsxmX0892)in part by University Innovation Research Group of Chongqing(Grant CxQT20017)in part by Youth Innovation Group Support Program of ICE Discipline of CQUPT(SCIE-QN-2022-04)in part by the Chongqing Graduate Student Scientific Research Innovation Project(CYB22246)。
文摘The emergence of various new services has posed a huge challenge to the existing network architecture.To improve the network delay and backhaul pressure,caching popular contents at the edge of network has been considered as a feasible scheme.However,how to efficiently utilize the limited caching resources to cache diverse contents has been confirmed as a tough problem in the past decade.In this paper,considering the time-varying user requests and the heterogeneous content sizes,a user preference aware hierarchical cooperative caching strategy in edge-user caching architecture is proposed.We divide the caching strategy into three phases,that is,the content placement,the content delivery and the content update.In the content placement phase,a cooperative content placement algorithm for local content popularity is designed to cache contents proactively.In the content delivery phase,a cooperative delivery algorithm is proposed to deliver the cached contents.In the content update phase,a content update algorithm is proposed according to the popularity of the contents.Finally,the proposed caching strategy is validated using the MovieLens dataset,and the results reveal that the proposed strategy improves the delay performance by at least 35.3%compared with the other three benchmark strategies.
文摘As China’s association with the outside world is increaing, young people today are more and more exposed to popular culture which comes from the wert, popular culture has become part of their daily lives. In this article, l’ll look into the elements of poprlar culture and the are of populan culture in English teaching and learning.
文摘Popular word on line is a kind of language form which is welcomed by netizens.The popular word on line is the most active part of network language.They are made of expressions what the internet users are established by usage.The popular words on line have a very strong nature of medium.They are the comprehensive products which come from the facts of social politics,economics,culture,environment and people's psychological activities etc.of a certain time.The total amount of new emerging popular words on line is not so many every year,but the influence of them can not be belittled.This study focuses on the popular words on line with the cases of the popular words occured in recent years.It works on the reasons for their rapid spreading.The author summarizes their characteristics and put forward some ways for the guidance of the popular words on line.
基金funded by the Key Project of Hunan Provincial Science and Technology Innovation(2020SK1011,2020SK1010)。
文摘In China,there are 544,000 sudden deaths each year.Cardiac arrest is one of the most common causes of sudden death,and 70%of cardiac arrests occur outside the hospital.[1,2]However,fewer than 1%of bystanders at cardiac arrest deaths in China are well-trained and capable of administering first aid.[3]Therefore,it is urgent to popularize first-aid knowledge in the Chinese population.