A new method of prefetching data blocks from the NVCache to the page cache in main memory and cascading prefetching n-blocks from a hard disk to the NVCache together was proposed to reduce the spin-up frequency of a h...A new method of prefetching data blocks from the NVCache to the page cache in main memory and cascading prefetching n-blocks from a hard disk to the NVCache together was proposed to reduce the spin-up frequency of a hybrid hard disk drive and thus enhance I/O performance.The proposed method consists of three steps:1) Analyzing the pattern of read requests in block units;2) Determining the number of blocks prefetched to the NVCache;3) Replacing blocks in the NVCache according to the block replacement policy.The proposed method can reduce the latency time of a hybrid hard disk and optimize the power consumption of an IPTV set-top box.Experimental results show that the proposed method provides better average response time compared to an existing adaptive multistream prefetching(AMP) method by 25.17%.It also reduces by 20.83% the average power consumption over that of the existing external caching in energy saving storage system(EXCES) method.展开更多
A SOI material with thick BOX (2.2 μm) was successfully fabricated using the Smart-cut technology. The thick BOX SOI microstructures were investigated by high resolution cross-sectional transmission electron microsco...A SOI material with thick BOX (2.2 μm) was successfully fabricated using the Smart-cut technology. The thick BOX SOI microstructures were investigated by high resolution cross-sectional transmission electron microscopy (XTEM), while the electrical properties were studied by the spreading resistance profile (SRP). Experimental results demonstrate that both structural and electrical properties of the SOI structure are very good.展开更多
Digital broadcasting is a novel paradigm for the next generation broadcasting. Its goal is to provide not only better quality of pictures but also a variety of services that is impossible in traditional airwaves broad...Digital broadcasting is a novel paradigm for the next generation broadcasting. Its goal is to provide not only better quality of pictures but also a variety of services that is impossible in traditional airwaves broadcasting. One of the important factors for this new broadcasting environment is the interoperability among broadcasting applications since the environment is distributed. Therefore the broadcasting metadata becomes increasingly important and one of the metadata standards for a digital broadcasting is TV-Anytime metadata. TV-Anytime metadata is defined using XML schema, so its instances are XML data. In order to fulfill interoperability, a standard query language is also required and XQuery is a natural choice. There are some researches for dealing with broadcasting metadata. In our previous study, we have proposed the method for efficiently managing the broadcasting metadata in a service provider. However, the environment of a Set-Top Box for digital broadcasting is limited such as low-cost and low-setting. Therefore there are some considerations to apply general approaches for managing the metadata into the Set-Top Box. This paper proposes a method for efficiently managing the broadcasting metadata based on the Set-Top Box and a prototype of metadata management system for evaluating our method. Our system consists of a storage engine to store the metadata and an XQuery engine to search the stored metadata and uses special index for storing and searching. Our two engines are designed independently with hardware platform therefore these engines can be used in any low-cost applications to manage broadcasting metadata.展开更多
消费性电子产品(Consumer Electronics)近来比信息科技产业更引人注目，因为尽管经济景气自2001年起就逐步下滑，消费性电子产品市场仍持续地成长。今日，数字电视(DTV)已成为快速兴起的消费性电子产品之一。我们能利用它的平台功能发...消费性电子产品(Consumer Electronics)近来比信息科技产业更引人注目，因为尽管经济景气自2001年起就逐步下滑，消费性电子产品市场仍持续地成长。今日，数字电视(DTV)已成为快速兴起的消费性电子产品之一。我们能利用它的平台功能发展家庭多媒体平台(multimedia home platform；MHP)，提供个人计算机(PC)之外，另一个能与因特网连接(Internet)的管道，让我们拥有更丰富的多媒体生活。这也意味着庞大的商机。由于DTV接收数据的方式和机上盒(STB)相似，我们可藉由研究STB的架构来了解DTV。展开更多
Technology is being increasingly used to aid judging in sport, but its employment as the primary means of scoring is rare. We have developed and implemented a fully automated scoring system in the context of a modifie...Technology is being increasingly used to aid judging in sport, but its employment as the primary means of scoring is rare. We have developed and implemented a fully automated scoring system in the context of a modified, low-risk form of boxing. The system, which requires contestants to wear vests and gloves incorporating sensor fabrics, has been used in multiple settings over the past five years. During that period, it has undergone progressive iteration guided by action research methodology. Here, we summarise that iteration, reflect on present status and identify possible future directions. We have found that concept of automated scoring has wide appeal, and the wearable technology is almost universally considered comfortable. Nevertheless, some issues remain to be addressed. Use of the technology requires considerable prior and subsequent commitment of time. Apparently valid contacts occasionally fail to score. Causative factors include the configuration of electrical circuitry in the vests and deterioration of that circuitry with repeated vest use and washing. Also, false positive scores are sometimes generated by vest self-shorting and effects of sweat. Many contestants adopt unorthodox styles aimed at exploiting the characteristics of the automated scoring methodology, affecting the aesthetics of the modified sport. There is an expectation that technologically-based scoring should have much greater accuracy than human judging, and should be essentially fail-proof. Disillusionment can occur in?situations where this expectation is not met. We have identified potential?solutions to all the existing issues, with some now being actively explored. Continuation of the quest seems justified by popular dissatisfaction with subjective human judging of boxing and other sports, but we have come to realise that purely technological judging can introduce unforeseen complexities. Our observations could be relevant to various sports interested in the notion of technological judging.展开更多
随着智慧供热系统建设的不断推进,我国北方地区冬季供热的智能化水平得到重大提升。作为智慧供热系统实现智能化运行的基础,如何实现高效、精准的供热效果评估成为重要的研究课题。该文针对现有评估方法在快速性和准确性方面存在的缺陷...随着智慧供热系统建设的不断推进,我国北方地区冬季供热的智能化水平得到重大提升。作为智慧供热系统实现智能化运行的基础,如何实现高效、精准的供热效果评估成为重要的研究课题。该文针对现有评估方法在快速性和准确性方面存在的缺陷,提出一种基于快速导数动态时间规整(fast derivative dynamic time warping,FDDTW)的供热效果在线评估方法。利用箱线图获取最优参考供温曲线,再将终端用户室温计量装置实时采集到的数据进行滑窗处理,并利用FDDTW计算当前窗口供温曲线和最优参考供温曲线之间的距离,通过FDDTW评估得分判断当前供温效果是否满足实际要求。相较于传统的动态时间规整算法,该算法改善奇异性、提高效率,为智慧供热系统提供切实可行的供热效果在线评估方法。展开更多
基金supported in part by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (2011-0004114)in part by the Ministry of Knowledge Economy (MKE) and Korea Institute for Advancement in Technology (KIAT) through the Workforce Development Program in Strategic Technology in part by the MKE (The Ministry of Knowledge Economy), Korea, under the CITRC (Convergence Information Technology Research Center) support program (NIPA-2012-C6150-1201-0001) supervised by the NIPA (National IT Industry Promotion Agency)
文摘A new method of prefetching data blocks from the NVCache to the page cache in main memory and cascading prefetching n-blocks from a hard disk to the NVCache together was proposed to reduce the spin-up frequency of a hybrid hard disk drive and thus enhance I/O performance.The proposed method consists of three steps:1) Analyzing the pattern of read requests in block units;2) Determining the number of blocks prefetched to the NVCache;3) Replacing blocks in the NVCache according to the block replacement policy.The proposed method can reduce the latency time of a hybrid hard disk and optimize the power consumption of an IPTV set-top box.Experimental results show that the proposed method provides better average response time compared to an existing adaptive multistream prefetching(AMP) method by 25.17%.It also reduces by 20.83% the average power consumption over that of the existing external caching in energy saving storage system(EXCES) method.
基金Supported by the National Natural Science Foundation of China(No.69906005)and the Shanghai Youth Foundation(No.01 QMH1403)
文摘A SOI material with thick BOX (2.2 μm) was successfully fabricated using the Smart-cut technology. The thick BOX SOI microstructures were investigated by high resolution cross-sectional transmission electron microscopy (XTEM), while the electrical properties were studied by the spreading resistance profile (SRP). Experimental results demonstrate that both structural and electrical properties of the SOI structure are very good.
文摘Digital broadcasting is a novel paradigm for the next generation broadcasting. Its goal is to provide not only better quality of pictures but also a variety of services that is impossible in traditional airwaves broadcasting. One of the important factors for this new broadcasting environment is the interoperability among broadcasting applications since the environment is distributed. Therefore the broadcasting metadata becomes increasingly important and one of the metadata standards for a digital broadcasting is TV-Anytime metadata. TV-Anytime metadata is defined using XML schema, so its instances are XML data. In order to fulfill interoperability, a standard query language is also required and XQuery is a natural choice. There are some researches for dealing with broadcasting metadata. In our previous study, we have proposed the method for efficiently managing the broadcasting metadata in a service provider. However, the environment of a Set-Top Box for digital broadcasting is limited such as low-cost and low-setting. Therefore there are some considerations to apply general approaches for managing the metadata into the Set-Top Box. This paper proposes a method for efficiently managing the broadcasting metadata based on the Set-Top Box and a prototype of metadata management system for evaluating our method. Our system consists of a storage engine to store the metadata and an XQuery engine to search the stored metadata and uses special index for storing and searching. Our two engines are designed independently with hardware platform therefore these engines can be used in any low-cost applications to manage broadcasting metadata.
文摘消费性电子产品(Consumer Electronics)近来比信息科技产业更引人注目，因为尽管经济景气自2001年起就逐步下滑，消费性电子产品市场仍持续地成长。今日，数字电视(DTV)已成为快速兴起的消费性电子产品之一。我们能利用它的平台功能发展家庭多媒体平台(multimedia home platform；MHP)，提供个人计算机(PC)之外，另一个能与因特网连接(Internet)的管道，让我们拥有更丰富的多媒体生活。这也意味着庞大的商机。由于DTV接收数据的方式和机上盒(STB)相似，我们可藉由研究STB的架构来了解DTV。
文摘Technology is being increasingly used to aid judging in sport, but its employment as the primary means of scoring is rare. We have developed and implemented a fully automated scoring system in the context of a modified, low-risk form of boxing. The system, which requires contestants to wear vests and gloves incorporating sensor fabrics, has been used in multiple settings over the past five years. During that period, it has undergone progressive iteration guided by action research methodology. Here, we summarise that iteration, reflect on present status and identify possible future directions. We have found that concept of automated scoring has wide appeal, and the wearable technology is almost universally considered comfortable. Nevertheless, some issues remain to be addressed. Use of the technology requires considerable prior and subsequent commitment of time. Apparently valid contacts occasionally fail to score. Causative factors include the configuration of electrical circuitry in the vests and deterioration of that circuitry with repeated vest use and washing. Also, false positive scores are sometimes generated by vest self-shorting and effects of sweat. Many contestants adopt unorthodox styles aimed at exploiting the characteristics of the automated scoring methodology, affecting the aesthetics of the modified sport. There is an expectation that technologically-based scoring should have much greater accuracy than human judging, and should be essentially fail-proof. Disillusionment can occur in?situations where this expectation is not met. We have identified potential?solutions to all the existing issues, with some now being actively explored. Continuation of the quest seems justified by popular dissatisfaction with subjective human judging of boxing and other sports, but we have come to realise that purely technological judging can introduce unforeseen complexities. Our observations could be relevant to various sports interested in the notion of technological judging.
文摘随着智慧供热系统建设的不断推进,我国北方地区冬季供热的智能化水平得到重大提升。作为智慧供热系统实现智能化运行的基础,如何实现高效、精准的供热效果评估成为重要的研究课题。该文针对现有评估方法在快速性和准确性方面存在的缺陷,提出一种基于快速导数动态时间规整(fast derivative dynamic time warping,FDDTW)的供热效果在线评估方法。利用箱线图获取最优参考供温曲线,再将终端用户室温计量装置实时采集到的数据进行滑窗处理,并利用FDDTW计算当前窗口供温曲线和最优参考供温曲线之间的距离,通过FDDTW评估得分判断当前供温效果是否满足实际要求。相较于传统的动态时间规整算法,该算法改善奇异性、提高效率,为智慧供热系统提供切实可行的供热效果在线评估方法。
