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
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
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
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
BACKGROUND Cancer presents a significant public health challenge in China,necessitating broad collaboration across society.The Chinese government has articulated a goal to increase the overall five-year survival rate ...BACKGROUND Cancer presents a significant public health challenge in China,necessitating broad collaboration across society.The Chinese government has articulated a goal to increase the overall five-year survival rate for cancer by 15%by 2030.Achieving this objective requires not only advances in medical technology,but also an im-provement in the dissemination of knowledge pertaining to cancer prevention and treatment.AIM To provide a comprehensive understanding of the status of cancer prevention and level of popularization in China in 2023.METHODS From January 2023 to May 2023,online questionnaires were distributed to 3000 participants,including medical personnel,patients with cancer,their families,and the general public.There were 2711 valid responses,covering the entire nation.RESULTS A total of 1020 medical personnel and 1691 patients with cancer,their family members,and the general public participated in the survey.Among medical personnel,93.2%had popularized cancer health.Commonly addressed topics included cancer prevention(85.9%)and cancer screening(77.8%).Primary challenges included time constraints(73.9%),insufficient personnel and material support(66.7%),and uncertainty as to where to begin(49.3%).Among patients with cancer,their family members,and the general public,93.4%reported reading or watching cancer science popularization materials and 56.9%expressed a desire for deeper understanding.The most sought-after topics in cancer science popularization included cancer screening(80.2%)and cancer prevention(75.8%).The greatest challenge encountered in accessing cancer health popularization was an abundance of misinformation(67.5%).CONCLUSION Most clinical doctors,patients,family,and the general public wish to participate in cancer education.However,improvement in the quality of content in cancer prevention and treatment education is required.展开更多
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
Understanding the characteristics and predicting the popularity of the newly published online videos can provide direct implications in various contexts such as service design, advertisement planning, network manageme...Understanding the characteristics and predicting the popularity of the newly published online videos can provide direct implications in various contexts such as service design, advertisement planning, network management and etc. In this paper, we collect a real-world large-scale dataset from a leading online video service provider in China, namely Youku. We first analyze the dynamics of content publication and content popularity for the online video service. Then, we propose a rich set of features and exploit various effective classification methods to estimate the future popularity level of an individual video in various scenarios. We show that the future popularity level of a video can be predicted even before the video's release, and by introducing the historical popularity information the prediction performance can be improved dramatically. In addition, we investigate the importance of each feature group and each feature in the popularity prediction, and further reveal the factors that may impact the video popularity. We also discuss how the early monitoring period influences the popularity level prediction. Our work provides an insight into the popularity of the newly published online videos, and demonstrates promising practical applications for content publishers,service providers, online advisers and network operators.展开更多
Towards line speed and accurateness on-line content popularity monitoring on Content Centric Networking(CCN) routers, we propose a three-stage scheme based on Bloom filters and hash tables for differentiated traffic. ...Towards line speed and accurateness on-line content popularity monitoring on Content Centric Networking(CCN) routers, we propose a three-stage scheme based on Bloom filters and hash tables for differentiated traffic. At the first stage, we decide whether to deliver the content to the next stage depending on traffic types. The second stage consisting of Standard Bloom filters(SBF) and Counting Bloom filters(CBF) identifies the popular content. Meanwhile, a scalable sliding time window based monitoring scheme for different traffic types is proposed to implement frequent and real-time updates by the change of popularities. Hash tables according with sliding window are used to record the popularity at the third stage. Simulation results reveal that this method reaches a 40 Gbps processing speed at lower error probability with less memory, and it is more sensitive to the change of popularity. Additionally, the architecture which can be implemented in CCN router is flexible and scalable.展开更多
By analyzing the existing research achievements on the geopark interpretation system,this article has brought up a new explanation of the system from the aspect of easy-understood principle.We try to present our touri...By analyzing the existing research achievements on the geopark interpretation system,this article has brought up a new explanation of the system from the aspect of easy-understood principle.We try to present our tourists with geoheritage,natural and cultural resources by various medium,so that people could know more about geosciences during the tour.In the end,geoheritage protection is enhanced by such展开更多
In the history of Western education, ancient Greek' s education including the education of Sparta and that of Athens has an important position. The Greeks also leR a rich legacy of education in creating the splendid ...In the history of Western education, ancient Greek' s education including the education of Sparta and that of Athens has an important position. The Greeks also leR a rich legacy of education in creating the splendid culture and at the same time had a direct influence on the development of modem Western education. The study of Sparta and Athens in education contributes to our understanding of the ancient Greek education system. Each of the states of the education had its own unique characteristics and a deep influence on the western civilization. In this paper, by comparing the purpose of education: the fight to education and the right to receive education; the government policy on education; the education process and the attitudes towards women in education, we could have a basic knowledge of the education in Sparta and Athens.展开更多
With some improvements in the consumption structure,a steady increase in per capita disposable income,the growing number of urban youngsters living alone,the trend towards an increasingly aged population and so many o...With some improvements in the consumption structure,a steady increase in per capita disposable income,the growing number of urban youngsters living alone,the trend towards an increasingly aged population and so many other factors,raising pets has become one of the most promoted lifestyles.As people spend more money on their pets every year,many industries including pet food,products,medical care and pet services are developing,and a complete consumption chain was gradually formed,thus leading to a thriving pet economy.展开更多
Information-Centric Networking(ICN), an alternative architecture to the current Internet infrastructure, focuses on the distribution and retrieval of content by employing caches in a network to reduce network traffic....Information-Centric Networking(ICN), an alternative architecture to the current Internet infrastructure, focuses on the distribution and retrieval of content by employing caches in a network to reduce network traffic. The employment of caches may be accomplished using graph-based and content-based criteria such as the position of a node in a network and content popularity. The contribution of this paper lies on the characterization of content popularity for on-path in-network caching. To this end, four dynamic approaches for identifying content popularity are evaluated via simulations. Content popularity may be determined per chunk or per object, calculated by the number of requests for a content against the sum of requests or the maximum number of requests. Based on the results, chunk-based approaches provide 23% more accurate content popularity calculations than object-based approaches. In addition, approaches that are based on the comparison of a content against the maximum number of requests have been shown to be more accurate than the alternatives.展开更多
This study investigated the roles of adolescent popularity and likeability in eight domains of risk-taking in Australian grade 9 students (53% girls). The eight domains included previously examined areas of aggressive...This study investigated the roles of adolescent popularity and likeability in eight domains of risk-taking in Australian grade 9 students (53% girls). The eight domains included previously examined areas of aggressive behaviours, alcohol use, and sexual intercourse, and areas where there is scarce information, including antisocial activities, unprotected intercourse, body image-related risk-taking, unsafe road practices, and stranger-related risk-taking. The results indicated a clear association between popularity and higher risk-taking in five of the eight domains. This is contrasted with likeability, which was not directly related to risk-taking aside from one two-way interaction with gender for sexual intercourse. The findings demonstrate the importance of including a broader range of risk-taking activities when considering popularity, particularly stranger-related risk-taking.展开更多
Analyzing and modeling of the BitTorrent (BT) resource popularity and swarm evolution is important for better understanding current BT system and designing accurate BT simulators. Although lots of measurement studies ...Analyzing and modeling of the BitTorrent (BT) resource popularity and swarm evolution is important for better understanding current BT system and designing accurate BT simulators. Although lots of measurement studies on BT almost cover each important aspect, little work reflects the recent development of BT system. In this paper, we develop a hybrid measurement system incorporating both active and passive approaches. By exploiting DHT (Distribute Hash Table) and PEX (Peer Exchange) protocols, we collect more extensive information compared to prior measurement systems. Based on the measurement results, we study the resource popularity and swarm evolution with different population in minute/ hour/day scales, and discover that: 1) the resources in BT system appear obvious unbalanced distribution and hotspot phenomenon, in that 74.6% torrents have no more than 1000 peers;2) The lifetime of torrents can be divided into a fast growing stage, a dramatically shrinking stage, a sustaining stage and a slowly fading out stage in terms of swarm population;3) Users’ interest and diurnal periodicity are the main factors that influence the swarm evolution. The former dominates the first two stages, while the latter is decisive in the third stage. We raise an improved peer arrival rate model to describe the variation of the swarm population. Comparison results show that our model outperforms the state-of-the-art approach according to root mean square error and correlation coefficient.展开更多
Athens, a metropolis characterized by agglutination and compactness, but at the same time facing numerous urban and transport issues, saw its population swell during the 20th century which led to extensive urbanizatio...Athens, a metropolis characterized by agglutination and compactness, but at the same time facing numerous urban and transport issues, saw its population swell during the 20th century which led to extensive urbanization phenomena. This continued urbanization increases profoundly all urban activities with transportation being the key driver in energy consumption. Theories for sustainable cities prerequisite are the integration of a number of acts in order to reduce energy consumption, with mobility being the first consideration among others. The aim of this paper is to critically explore implemented policies and plans as well as forthcoming strategic plans in terms of sustainable mobility as imposed in large scale regeneration plans in contemporary Athens. Research focuses on strategic interventions since the 1980s, such as the Athenian Daktylios (ring road for circulation management) and its later adjustments, the upcoming pedestrianization and unification of the commercial triangle and its subsequent tram line extension as well as the notable implementation of the metropolitan cycling network. Moreover, the discussion takes into consideration the implications of the Greek economic crisis in mobility choices, as aimless travels have been reduced to a minimum, several cars have been abandoned and cyclists seem to tentatively claim some space in the urban environment. What will likely be the next day in the Athenian historic centre? Considering the transformations that are expected in the immediate future, this research paper explores their potential to enhance urban environment, reduce climate change impacts and amplify resilience.展开更多
On January 29, the 2019 "Happy Chinese New Year" cultural exchange activity was held in Athens, the capital city of Greece. Beijing Dance Academy, China Longyun Martial Arts Troupe, the Northern Kunqu Opera ...On January 29, the 2019 "Happy Chinese New Year" cultural exchange activity was held in Athens, the capital city of Greece. Beijing Dance Academy, China Longyun Martial Arts Troupe, the Northern Kunqu Opera Theatre, China National Acrobatics Troupe, and Beijing National Traditional Orchestra presented excellent performances for guests, including folk music, martial arts, dance, acrobatics, and Kunqu Opera.展开更多
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.
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.
基金Supported by National Natural Science Foundation of China,No.82072734.
文摘BACKGROUND Cancer presents a significant public health challenge in China,necessitating broad collaboration across society.The Chinese government has articulated a goal to increase the overall five-year survival rate for cancer by 15%by 2030.Achieving this objective requires not only advances in medical technology,but also an im-provement in the dissemination of knowledge pertaining to cancer prevention and treatment.AIM To provide a comprehensive understanding of the status of cancer prevention and level of popularization in China in 2023.METHODS From January 2023 to May 2023,online questionnaires were distributed to 3000 participants,including medical personnel,patients with cancer,their families,and the general public.There were 2711 valid responses,covering the entire nation.RESULTS A total of 1020 medical personnel and 1691 patients with cancer,their family members,and the general public participated in the survey.Among medical personnel,93.2%had popularized cancer health.Commonly addressed topics included cancer prevention(85.9%)and cancer screening(77.8%).Primary challenges included time constraints(73.9%),insufficient personnel and material support(66.7%),and uncertainty as to where to begin(49.3%).Among patients with cancer,their family members,and the general public,93.4%reported reading or watching cancer science popularization materials and 56.9%expressed a desire for deeper understanding.The most sought-after topics in cancer science popularization included cancer screening(80.2%)and cancer prevention(75.8%).The greatest challenge encountered in accessing cancer health popularization was an abundance of misinformation(67.5%).CONCLUSION Most clinical doctors,patients,family,and the general public wish to participate in cancer education.However,improvement in the quality of content in cancer prevention and treatment education is required.
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Understanding the characteristics and predicting the popularity of the newly published online videos can provide direct implications in various contexts such as service design, advertisement planning, network management and etc. In this paper, we collect a real-world large-scale dataset from a leading online video service provider in China, namely Youku. We first analyze the dynamics of content publication and content popularity for the online video service. Then, we propose a rich set of features and exploit various effective classification methods to estimate the future popularity level of an individual video in various scenarios. We show that the future popularity level of a video can be predicted even before the video's release, and by introducing the historical popularity information the prediction performance can be improved dramatically. In addition, we investigate the importance of each feature group and each feature in the popularity prediction, and further reveal the factors that may impact the video popularity. We also discuss how the early monitoring period influences the popularity level prediction. Our work provides an insight into the popularity of the newly published online videos, and demonstrates promising practical applications for content publishers,service providers, online advisers and network operators.
基金supported by the Foundation for Innovative Research Groups of the National Natural Science Foundation of China (Grant No.61521003)the National Basic Research Program of China (2012CB315901, 2013CB329104)+1 种基金the National Natural Science Foundation of China (Grant No. 61372121, 61309019, 61309020)the National HighTech Research & Development Program of China (Grant No. 2015AA016102, 2013AA013505)
文摘Towards line speed and accurateness on-line content popularity monitoring on Content Centric Networking(CCN) routers, we propose a three-stage scheme based on Bloom filters and hash tables for differentiated traffic. At the first stage, we decide whether to deliver the content to the next stage depending on traffic types. The second stage consisting of Standard Bloom filters(SBF) and Counting Bloom filters(CBF) identifies the popular content. Meanwhile, a scalable sliding time window based monitoring scheme for different traffic types is proposed to implement frequent and real-time updates by the change of popularities. Hash tables according with sliding window are used to record the popularity at the third stage. Simulation results reveal that this method reaches a 40 Gbps processing speed at lower error probability with less memory, and it is more sensitive to the change of popularity. Additionally, the architecture which can be implemented in CCN router is flexible and scalable.
文摘By analyzing the existing research achievements on the geopark interpretation system,this article has brought up a new explanation of the system from the aspect of easy-understood principle.We try to present our tourists with geoheritage,natural and cultural resources by various medium,so that people could know more about geosciences during the tour.In the end,geoheritage protection is enhanced by such
文摘In the history of Western education, ancient Greek' s education including the education of Sparta and that of Athens has an important position. The Greeks also leR a rich legacy of education in creating the splendid culture and at the same time had a direct influence on the development of modem Western education. The study of Sparta and Athens in education contributes to our understanding of the ancient Greek education system. Each of the states of the education had its own unique characteristics and a deep influence on the western civilization. In this paper, by comparing the purpose of education: the fight to education and the right to receive education; the government policy on education; the education process and the attitudes towards women in education, we could have a basic knowledge of the education in Sparta and Athens.
文摘With some improvements in the consumption structure,a steady increase in per capita disposable income,the growing number of urban youngsters living alone,the trend towards an increasingly aged population and so many other factors,raising pets has become one of the most promoted lifestyles.As people spend more money on their pets every year,many industries including pet food,products,medical care and pet services are developing,and a complete consumption chain was gradually formed,thus leading to a thriving pet economy.
基金funded by the Higher Education Authority (HEA)co-funded under the European Regional Development Fund (ERDF)
文摘Information-Centric Networking(ICN), an alternative architecture to the current Internet infrastructure, focuses on the distribution and retrieval of content by employing caches in a network to reduce network traffic. The employment of caches may be accomplished using graph-based and content-based criteria such as the position of a node in a network and content popularity. The contribution of this paper lies on the characterization of content popularity for on-path in-network caching. To this end, four dynamic approaches for identifying content popularity are evaluated via simulations. Content popularity may be determined per chunk or per object, calculated by the number of requests for a content against the sum of requests or the maximum number of requests. Based on the results, chunk-based approaches provide 23% more accurate content popularity calculations than object-based approaches. In addition, approaches that are based on the comparison of a content against the maximum number of requests have been shown to be more accurate than the alternatives.
文摘This study investigated the roles of adolescent popularity and likeability in eight domains of risk-taking in Australian grade 9 students (53% girls). The eight domains included previously examined areas of aggressive behaviours, alcohol use, and sexual intercourse, and areas where there is scarce information, including antisocial activities, unprotected intercourse, body image-related risk-taking, unsafe road practices, and stranger-related risk-taking. The results indicated a clear association between popularity and higher risk-taking in five of the eight domains. This is contrasted with likeability, which was not directly related to risk-taking aside from one two-way interaction with gender for sexual intercourse. The findings demonstrate the importance of including a broader range of risk-taking activities when considering popularity, particularly stranger-related risk-taking.
文摘Analyzing and modeling of the BitTorrent (BT) resource popularity and swarm evolution is important for better understanding current BT system and designing accurate BT simulators. Although lots of measurement studies on BT almost cover each important aspect, little work reflects the recent development of BT system. In this paper, we develop a hybrid measurement system incorporating both active and passive approaches. By exploiting DHT (Distribute Hash Table) and PEX (Peer Exchange) protocols, we collect more extensive information compared to prior measurement systems. Based on the measurement results, we study the resource popularity and swarm evolution with different population in minute/ hour/day scales, and discover that: 1) the resources in BT system appear obvious unbalanced distribution and hotspot phenomenon, in that 74.6% torrents have no more than 1000 peers;2) The lifetime of torrents can be divided into a fast growing stage, a dramatically shrinking stage, a sustaining stage and a slowly fading out stage in terms of swarm population;3) Users’ interest and diurnal periodicity are the main factors that influence the swarm evolution. The former dominates the first two stages, while the latter is decisive in the third stage. We raise an improved peer arrival rate model to describe the variation of the swarm population. Comparison results show that our model outperforms the state-of-the-art approach according to root mean square error and correlation coefficient.
文摘Athens, a metropolis characterized by agglutination and compactness, but at the same time facing numerous urban and transport issues, saw its population swell during the 20th century which led to extensive urbanization phenomena. This continued urbanization increases profoundly all urban activities with transportation being the key driver in energy consumption. Theories for sustainable cities prerequisite are the integration of a number of acts in order to reduce energy consumption, with mobility being the first consideration among others. The aim of this paper is to critically explore implemented policies and plans as well as forthcoming strategic plans in terms of sustainable mobility as imposed in large scale regeneration plans in contemporary Athens. Research focuses on strategic interventions since the 1980s, such as the Athenian Daktylios (ring road for circulation management) and its later adjustments, the upcoming pedestrianization and unification of the commercial triangle and its subsequent tram line extension as well as the notable implementation of the metropolitan cycling network. Moreover, the discussion takes into consideration the implications of the Greek economic crisis in mobility choices, as aimless travels have been reduced to a minimum, several cars have been abandoned and cyclists seem to tentatively claim some space in the urban environment. What will likely be the next day in the Athenian historic centre? Considering the transformations that are expected in the immediate future, this research paper explores their potential to enhance urban environment, reduce climate change impacts and amplify resilience.
文摘On January 29, the 2019 "Happy Chinese New Year" cultural exchange activity was held in Athens, the capital city of Greece. Beijing Dance Academy, China Longyun Martial Arts Troupe, the Northern Kunqu Opera Theatre, China National Acrobatics Troupe, and Beijing National Traditional Orchestra presented excellent performances for guests, including folk music, martial arts, dance, acrobatics, and Kunqu Opera.