自2013年ICANN发起新通用顶级域名(new gTLD)的授权以来,域名系统(domain name system,DNS)中已增加了上千个new gTLD.已有工作表明new gTLD在为域名注册者带来了灵活性的同时,由于注册成本低等原因也经常被用于恶意行为,识别恶意new g...自2013年ICANN发起新通用顶级域名(new gTLD)的授权以来,域名系统(domain name system,DNS)中已增加了上千个new gTLD.已有工作表明new gTLD在为域名注册者带来了灵活性的同时,由于注册成本低等原因也经常被用于恶意行为,识别恶意new gTLD域名具有重要的意义.然而,由于new g TLD域名在域名长度等方面的独有特征,已有恶意域名识别方法应用于new gTLD恶意域名的识别时准确率低.针对这一问题,首先基于海量域名解析数据,从顶级域名对应二级域名(SLD)数量、查询量、查询失败率、内容复制和承载基础设施共享5个方面刻画了new gTLD域名解析行为.然后分析恶意域名的解析行为并发现其在内容承载基础设施集中性、SLD对应的完全限定域名(FQDN)数目、域名查询次数、请求用户网络空间分布、SLD长度分布等方面的特征.最后根据这些特征设计了一种基于随机森林的new g TLD恶意域名检测方法.实验结果表明,所提方法达到了94%的准确率,优于已有恶意域名检测方法.展开更多
In this paper, I first create new frameworks for a reflection on “human” and “humanism” in the time of globalization. As our intellectual perception of the world is becoming more universal and all-inclusive, so sh...In this paper, I first create new frameworks for a reflection on “human” and “humanism” in the time of globalization. As our intellectual perception of the world is becoming more universal and all-inclusive, so should also our hearts. The heart is the inner most core of being human, to become able to expand in unprecedented dimensions of human existence. In this context, I propose forgiveness as the guiding principle of expansion and inclusion, and consequently of becoming more human. If memory helps us to survive, forgetting allows us to go on living. The practice of forgetting, and consequently of reconciliation, is the distinctive and complex moment of human existence, when the human agent makes him/herself open and available to the present moment, and lives fully in the present moment. Once doing so, the present moment becomes the space in which s/he can reconcile with his/her past and shape his/her future. In the second part, I check possible impediments on our way to expansion and inclusion, as well as in our process of forgiveness and reconciliation. Pata？jali, in his instructions to yogis talks about kleshas, i.e. impediments or afflictions, which are weakening our way of thinking and acting. These kleshas include ignorance, ego, attachment, aversion, and the clinging to life. I take these kleshas also as afflictions on our way to becoming more human, or as impediments in our process of forgiveness and reconciliation. Finally, I reflect on the human urge to become more human. In our time of globalization, we are challenged to look at this urge from a universal perspective. This urge, bound with an inevitable process of forgiveness and reconciliation, challenges each religion and its dogmatic teaching, and represents the evaluative criterion. The spirituality, or religion, that which promulgates and lives forgiveness and reconciliation will automatically excel because it will succeed, without losing its own identity, to integrate and include otherness of the other.展开更多
Intelligent transportation system (ITS) has become a popular research topic to meet the increased demands of transportation safety,traffic efficiency,comfort in the journey and environment protection,etc. ITS applicat...Intelligent transportation system (ITS) has become a popular research topic to meet the increased demands of transportation safety,traffic efficiency,comfort in the journey and environment protection,etc. ITS applications impose higher requirements on wireless communication systems. For example,safety-related ITS services must always be low latency and entertainment-related ITS services need high data rate. The ITS dedicated short range communications (DSRC) technology to support the safetyrelated application is still under development, while long term evolution (LTE),as the next generation mobile communication systems,offers an efficient communication platform for ITS information exchange , which can meet most ITS services requirements of latency,data rate as well as communication range. In this paper,based on the time-division duplex (TDD) mode of LTE,i.e. TD-LTE,an enhanced TD-LTE network architecture is introduced to better support safety-related ITS application with low latency requirement,and some enhanced access schemes of TD-LTE are proposed to improve the performance of supporting the high-speed IP-based ITS applications in hotspots. At last,two practical application scenarios of enhanced TD-LTE systems are given.展开更多
文摘自2013年ICANN发起新通用顶级域名(new gTLD)的授权以来,域名系统(domain name system,DNS)中已增加了上千个new gTLD.已有工作表明new gTLD在为域名注册者带来了灵活性的同时,由于注册成本低等原因也经常被用于恶意行为,识别恶意new gTLD域名具有重要的意义.然而,由于new g TLD域名在域名长度等方面的独有特征,已有恶意域名识别方法应用于new gTLD恶意域名的识别时准确率低.针对这一问题,首先基于海量域名解析数据,从顶级域名对应二级域名(SLD)数量、查询量、查询失败率、内容复制和承载基础设施共享5个方面刻画了new gTLD域名解析行为.然后分析恶意域名的解析行为并发现其在内容承载基础设施集中性、SLD对应的完全限定域名(FQDN)数目、域名查询次数、请求用户网络空间分布、SLD长度分布等方面的特征.最后根据这些特征设计了一种基于随机森林的new g TLD恶意域名检测方法.实验结果表明,所提方法达到了94%的准确率,优于已有恶意域名检测方法.
文摘In this paper, I first create new frameworks for a reflection on “human” and “humanism” in the time of globalization. As our intellectual perception of the world is becoming more universal and all-inclusive, so should also our hearts. The heart is the inner most core of being human, to become able to expand in unprecedented dimensions of human existence. In this context, I propose forgiveness as the guiding principle of expansion and inclusion, and consequently of becoming more human. If memory helps us to survive, forgetting allows us to go on living. The practice of forgetting, and consequently of reconciliation, is the distinctive and complex moment of human existence, when the human agent makes him/herself open and available to the present moment, and lives fully in the present moment. Once doing so, the present moment becomes the space in which s/he can reconcile with his/her past and shape his/her future. In the second part, I check possible impediments on our way to expansion and inclusion, as well as in our process of forgiveness and reconciliation. Pata？jali, in his instructions to yogis talks about kleshas, i.e. impediments or afflictions, which are weakening our way of thinking and acting. These kleshas include ignorance, ego, attachment, aversion, and the clinging to life. I take these kleshas also as afflictions on our way to becoming more human, or as impediments in our process of forgiveness and reconciliation. Finally, I reflect on the human urge to become more human. In our time of globalization, we are challenged to look at this urge from a universal perspective. This urge, bound with an inevitable process of forgiveness and reconciliation, challenges each religion and its dogmatic teaching, and represents the evaluative criterion. The spirituality, or religion, that which promulgates and lives forgiveness and reconciliation will automatically excel because it will succeed, without losing its own identity, to integrate and include otherness of the other.
基金National Science and Technology Major Project (No.2012ZX03005010-005)
文摘Intelligent transportation system (ITS) has become a popular research topic to meet the increased demands of transportation safety,traffic efficiency,comfort in the journey and environment protection,etc. ITS applications impose higher requirements on wireless communication systems. For example,safety-related ITS services must always be low latency and entertainment-related ITS services need high data rate. The ITS dedicated short range communications (DSRC) technology to support the safetyrelated application is still under development, while long term evolution (LTE),as the next generation mobile communication systems,offers an efficient communication platform for ITS information exchange , which can meet most ITS services requirements of latency,data rate as well as communication range. In this paper,based on the time-division duplex (TDD) mode of LTE,i.e. TD-LTE,an enhanced TD-LTE network architecture is introduced to better support safety-related ITS application with low latency requirement,and some enhanced access schemes of TD-LTE are proposed to improve the performance of supporting the high-speed IP-based ITS applications in hotspots. At last,two practical application scenarios of enhanced TD-LTE systems are given.
