Users express their emotions in online social networks （OSNs）. Studying emotions is important for understanding user behaviors. Existing methods in emotion prediction mainly use personal emotion and friend emotion t...Users express their emotions in online social networks （OSNs）. Studying emotions is important for understanding user behaviors. Existing methods in emotion prediction mainly use personal emotion and friend emotion to predict target emotion. In this study, public sentiment is introduced to denote the sentiment of the majority in the network. Public conformity is calculated to measure the degree of a user conforming to the public sentiment. According to the public conformity, users are categorized into three classes： Approvers, independents, and starters. A user-level model for emotion prediction is proposed to predict target emotions of different classes of users, taking into account of the public sentiment, individual sentiment, friend sentiment and pseudo-friend sentiment. Relations between the public conformity and the structure of the network are studied. Experiments conducted on Sina Weibo show that the proposed model could achieve performance improvements to some existing methods in most cases.展开更多
In this paper, we present the Tianhe-2 interconnect network and message passing services. We describe the architecture of the router and network interface chips, and highlight a set of hardware and software features e...In this paper, we present the Tianhe-2 interconnect network and message passing services. We describe the architecture of the router and network interface chips, and highlight a set of hardware and software features effectively supporting high performance communications, ranging over remote direct memory access, collective optimization, hardwareenable reliable end-to-end communication, user-level message passing services, etc. Measured hardware performance results are also presented.展开更多
On Dawning-1000, the two-dimension mesh interconnection network enables low-latency, high-bandwidth communication, however, these capabilities have not been realized because of the high processing overhead imposed by ...On Dawning-1000, the two-dimension mesh interconnection network enables low-latency, high-bandwidth communication, however, these capabilities have not been realized because of the high processing overhead imposed by existing com- munication software. Active Messages provide an efficient communication mecha nism with small overhead, which may expose the raw capabilities of the underlying hardware. In addition, one of the most promising techniques, user-level communi- cation, is often used to improve the performance of the traditional protocols such as TCP and UDP, and is also adopted in implementing the novel abstractions like Active Messages. Thus a user-level Active Messages model is designed and imple- mented on Dawning-1000. Preliminary experiments show that the combination of Active Messages mechanism and user-level communication technique is quite efficient in reducing software overhead associated with sending and receiving messages and in exploiting the capabilities of the interconnection network.展开更多
针对IA-64平台地址空间和数据空间的特点,该文给出一种简单有效的地址转换与数据表示方法,在此基础上提出可以有效保持虚拟接口结构(v irtua l in terfacearch itecture,V IA)各层抽象描述与具体实现相一致的设计方案。在自主研制的V I...针对IA-64平台地址空间和数据空间的特点,该文给出一种简单有效的地址转换与数据表示方法,在此基础上提出可以有效保持虚拟接口结构(v irtua l in terfacearch itecture,V IA)各层抽象描述与具体实现相一致的设计方案。在自主研制的V IA通信硬件基础上,实现了一个软硬件有机结合的实例THV IA 64。测试结果表明THV IA 64不仅可以稳定运行,而且具有很高的通信性能,8 B延迟为9μs,最大带宽为119 M B/s。对比数据表明V IA在IA-64平台上可以展示出更好的性能。展开更多
基金supported in part by National Key Basic Research and Department (973) Program of China (2013CB329606)Natural Science Foundation of China (61402045)
文摘Users express their emotions in online social networks （OSNs）. Studying emotions is important for understanding user behaviors. Existing methods in emotion prediction mainly use personal emotion and friend emotion to predict target emotion. In this study, public sentiment is introduced to denote the sentiment of the majority in the network. Public conformity is calculated to measure the degree of a user conforming to the public sentiment. According to the public conformity, users are categorized into three classes： Approvers, independents, and starters. A user-level model for emotion prediction is proposed to predict target emotions of different classes of users, taking into account of the public sentiment, individual sentiment, friend sentiment and pseudo-friend sentiment. Relations between the public conformity and the structure of the network are studied. Experiments conducted on Sina Weibo show that the proposed model could achieve performance improvements to some existing methods in most cases.
基金This work was partially supported by the National High Technology Research and Development 863 Program of China under Grant No. 2012AA01A301 and the National Natural Science Foundation of China under Grant No. 61120106005. Acknowledgements The Tianhe-2 project is a great team effort and benefits from the cooperation of many individuals at NUDT. We would like to thank the entire Tianhe-2 development, applications, and bench- marking teams, and all the people who have contributed to the system in a variety of ways.
文摘In this paper, we present the Tianhe-2 interconnect network and message passing services. We describe the architecture of the router and network interface chips, and highlight a set of hardware and software features effectively supporting high performance communications, ranging over remote direct memory access, collective optimization, hardwareenable reliable end-to-end communication, user-level message passing services, etc. Measured hardware performance results are also presented.
基金National '863' Hi-Tech Programme National Natural Science Foundation of China
文摘On Dawning-1000, the two-dimension mesh interconnection network enables low-latency, high-bandwidth communication, however, these capabilities have not been realized because of the high processing overhead imposed by existing com- munication software. Active Messages provide an efficient communication mecha nism with small overhead, which may expose the raw capabilities of the underlying hardware. In addition, one of the most promising techniques, user-level communi- cation, is often used to improve the performance of the traditional protocols such as TCP and UDP, and is also adopted in implementing the novel abstractions like Active Messages. Thus a user-level Active Messages model is designed and imple- mented on Dawning-1000. Preliminary experiments show that the combination of Active Messages mechanism and user-level communication technique is quite efficient in reducing software overhead associated with sending and receiving messages and in exploiting the capabilities of the interconnection network.
文摘针对IA-64平台地址空间和数据空间的特点,该文给出一种简单有效的地址转换与数据表示方法,在此基础上提出可以有效保持虚拟接口结构(v irtua l in terfacearch itecture,V IA)各层抽象描述与具体实现相一致的设计方案。在自主研制的V IA通信硬件基础上,实现了一个软硬件有机结合的实例THV IA 64。测试结果表明THV IA 64不仅可以稳定运行,而且具有很高的通信性能,8 B延迟为9μs,最大带宽为119 M B/s。对比数据表明V IA在IA-64平台上可以展示出更好的性能。
