显示器电磁木马是通过控制计算机屏幕电磁辐射达到窃取信息目的的一种新型木马。当前的主流防护思想是用软件防护代替较为成熟但造价昂贵的硬件防护机制,然而目前软防护思想大多侧重于理论方法的探索,在实现机制上相对比较复杂。针对显...显示器电磁木马是通过控制计算机屏幕电磁辐射达到窃取信息目的的一种新型木马。当前的主流防护思想是用软件防护代替较为成熟但造价昂贵的硬件防护机制,然而目前软防护思想大多侧重于理论方法的探索,在实现机制上相对比较复杂。针对显示器电磁木马的工作特点提出了Soft-TEMPEST防护机制,设计了显示器电磁木马的ADFA(API Detection and Frequency Analysis)检测方法。该方法通过API函数序列的周期性挖掘分析,结合对屏幕像素信息的傅里叶变换及频谱分析,达到检测出木马进程的目的。测试结果表明,该方法能够成功检测出多种显示器电磁木马,而且原理简单,方便投入使用。展开更多
《Couleurs du temps》是法国作曲家Yann Geslin于1982年创作的音响型电子音乐作品《Variations didactique》中的第二乐章。在作品中,作曲家以人的语言音响为素材,对其进行切分、重组、重复等变化方式将素材变形,并运用复调音乐的思维...《Couleurs du temps》是法国作曲家Yann Geslin于1982年创作的音响型电子音乐作品《Variations didactique》中的第二乐章。在作品中,作曲家以人的语言音响为素材,对其进行切分、重组、重复等变化方式将素材变形,并运用复调音乐的思维方式将它们组织在一起。通过对其二声部特征及其音响材料组织方式的分析,讨论复调性特征在音响型电子音乐中的体现。展开更多
A hybrid distributed virtual environment （DVE） architecture is presented by importing a peer-to-peer （P2P） idea into the traditional client/server （C/S） architecture to improve the DVE system＇s scalability. The...A hybrid distributed virtual environment （DVE） architecture is presented by importing a peer-to-peer （P2P） idea into the traditional client/server （C/S） architecture to improve the DVE system＇s scalability. The mathematical model of the overload of the center server was built and a series of simulation experiments were performed to validate the conclusions. When the client number increases to a certain value, the hybrid architecture can reduce server overload with some special clients （temp servers） selected with a certain heuristic strategy. With this architecture, the DVE system can support more system clients with the same server hardware than the C/S architecture can. The server overload ＂pulse＂ phenomena causing by the exiting of the temp server can be resolved by adopting a more optimized temp server selecting strategy and by reducing the child client capability of the temp server. By combining the advantages of the C/S architecture and the P2P architecture, the hybrid DVE architecture can effectively improve the scalability of the DVE system. This is validated by theoretical analysis and simulation experiments.展开更多
The current temperature field model of mine gob does not take the boundary conditions of the atmospheric pressure into account, while the actual atmospheric pressure is influenced by weather, so as to produce differen...The current temperature field model of mine gob does not take the boundary conditions of the atmospheric pressure into account, while the actual atmospheric pressure is influenced by weather, so as to produce differences between ventilation negative pressure of the working face and the negative pressure of gas drainage in gob, thus interfering the calculated results of gob temperature field. According to the characteristics of the actual air flow and temperature change in gob, a two-dimensional temperature field model of the gob was built, and the relational model between the air pressure of intake and outlet of the gob and the atmospheric pressure was established, which was introduced into the boundary conditions of temperature field to conduct calculation. By means of analysis on the simulation example, and comparison with the traditional model, the results indicate that atmospheric pressure change had notable impact on the distribution of gob temperature field. The laboratory test system of gob temperature field was constructed, and the relative error between simulated and measured value was no greater than 9.6%, which verified the effectiveness of the proposed model. This work offers theoretical basis for accurate calculation of temperature and prediction of ignition source in mine gob, and has important implications on preventing spontaneous combustion of coal.展开更多
Being based on preliminary study of Kunming famous temples during the Ming and Qing dynasties,field investigation was carried out about the framework of landscape,layout of waters,characteristic of structure and plant...Being based on preliminary study of Kunming famous temples during the Ming and Qing dynasties,field investigation was carried out about the framework of landscape,layout of waters,characteristic of structure and plant furnishing in Tanhua temple,Black Dragon Pool,Masijid of Shuncheng,Haiyuan temple and Golden Shrine which are famous temple garden in Kunming. A simple interpretation was drawn of artistic characteristics on temple garden in Kunming during the Ming and Qing dynasties via analytical investigation on many factors which influenced the development of garden of Dynasties of Ming and Qing. Then we have reviewed the elemental traits of temple garden built at that time,put forward some constructive suggestions on how to protect and develop those temple garden now still exist in Kunming.展开更多
奥钢联成功开发出用于冶金炉连续测温的 VAI- CON Tem p系统 ,并在工业生产条件下的 KMS、AOD和 L D转炉以及真空脱气设备上进行了充分测试 ,证明为改进炼钢工艺控制提供了巨大潜力。 VAI-CON Tem p连续测温系统可在整个炼钢周期内提供...奥钢联成功开发出用于冶金炉连续测温的 VAI- CON Tem p系统 ,并在工业生产条件下的 KMS、AOD和 L D转炉以及真空脱气设备上进行了充分测试 ,证明为改进炼钢工艺控制提供了巨大潜力。 VAI-CON Tem p连续测温系统可在整个炼钢周期内提供高精度的温度结果 。展开更多
We admit it:this place doesn't have the coolest name-at least not in English.In Mandarin there's this nifty play on words where the character for‘beer’(pi,啤)has replaced part of the word for‘temper’(pi,脾...We admit it:this place doesn't have the coolest name-at least not in English.In Mandarin there's this nifty play on words where the character for‘beer’(pi,啤)has replaced part of the word for‘temper’(pi,脾)because they happen to sound the same.展开更多
Think booze in China and it's not all about red faces,unwilling bajiu sessions,Tsingtao and unopened gifts of XO brandy languishing on shelves.Less in the expat purview are local national bev-erages such as huangj...Think booze in China and it's not all about red faces,unwilling bajiu sessions,Tsingtao and unopened gifts of XO brandy languishing on shelves.Less in the expat purview are local national bev-erages such as huangjiu(yellow wine),mijiu(rice wine)and one that remains unexplored by most:the alcohol-drug combo,yaojiu.展开更多
文摘显示器电磁木马是通过控制计算机屏幕电磁辐射达到窃取信息目的的一种新型木马。当前的主流防护思想是用软件防护代替较为成熟但造价昂贵的硬件防护机制,然而目前软防护思想大多侧重于理论方法的探索,在实现机制上相对比较复杂。针对显示器电磁木马的工作特点提出了Soft-TEMPEST防护机制,设计了显示器电磁木马的ADFA(API Detection and Frequency Analysis)检测方法。该方法通过API函数序列的周期性挖掘分析,结合对屏幕像素信息的傅里叶变换及频谱分析,达到检测出木马进程的目的。测试结果表明,该方法能够成功检测出多种显示器电磁木马,而且原理简单,方便投入使用。
文摘《Couleurs du temps》是法国作曲家Yann Geslin于1982年创作的音响型电子音乐作品《Variations didactique》中的第二乐章。在作品中,作曲家以人的语言音响为素材,对其进行切分、重组、重复等变化方式将素材变形,并运用复调音乐的思维方式将它们组织在一起。通过对其二声部特征及其音响材料组织方式的分析,讨论复调性特征在音响型电子音乐中的体现。
文摘A hybrid distributed virtual environment （DVE） architecture is presented by importing a peer-to-peer （P2P） idea into the traditional client/server （C/S） architecture to improve the DVE system＇s scalability. The mathematical model of the overload of the center server was built and a series of simulation experiments were performed to validate the conclusions. When the client number increases to a certain value, the hybrid architecture can reduce server overload with some special clients （temp servers） selected with a certain heuristic strategy. With this architecture, the DVE system can support more system clients with the same server hardware than the C/S architecture can. The server overload ＂pulse＂ phenomena causing by the exiting of the temp server can be resolved by adopting a more optimized temp server selecting strategy and by reducing the child client capability of the temp server. By combining the advantages of the C/S architecture and the P2P architecture, the hybrid DVE architecture can effectively improve the scalability of the DVE system. This is validated by theoretical analysis and simulation experiments.
基金Project(2012BAK04B05)supported by the National Science and Technology Support Program during the Twelfth Five-year Plan PeriodChina+2 种基金Project(51174113)supported by the National Natural Science Foundation of China(2012YQ240127)the National Key Scientific Instrument and Equipment Development ProjectChina
文摘The current temperature field model of mine gob does not take the boundary conditions of the atmospheric pressure into account, while the actual atmospheric pressure is influenced by weather, so as to produce differences between ventilation negative pressure of the working face and the negative pressure of gas drainage in gob, thus interfering the calculated results of gob temperature field. According to the characteristics of the actual air flow and temperature change in gob, a two-dimensional temperature field model of the gob was built, and the relational model between the air pressure of intake and outlet of the gob and the atmospheric pressure was established, which was introduced into the boundary conditions of temperature field to conduct calculation. By means of analysis on the simulation example, and comparison with the traditional model, the results indicate that atmospheric pressure change had notable impact on the distribution of gob temperature field. The laboratory test system of gob temperature field was constructed, and the relative error between simulated and measured value was no greater than 9.6%, which verified the effectiveness of the proposed model. This work offers theoretical basis for accurate calculation of temperature and prediction of ignition source in mine gob, and has important implications on preventing spontaneous combustion of coal.
文摘Being based on preliminary study of Kunming famous temples during the Ming and Qing dynasties,field investigation was carried out about the framework of landscape,layout of waters,characteristic of structure and plant furnishing in Tanhua temple,Black Dragon Pool,Masijid of Shuncheng,Haiyuan temple and Golden Shrine which are famous temple garden in Kunming. A simple interpretation was drawn of artistic characteristics on temple garden in Kunming during the Ming and Qing dynasties via analytical investigation on many factors which influenced the development of garden of Dynasties of Ming and Qing. Then we have reviewed the elemental traits of temple garden built at that time,put forward some constructive suggestions on how to protect and develop those temple garden now still exist in Kunming.
文摘We admit it:this place doesn't have the coolest name-at least not in English.In Mandarin there's this nifty play on words where the character for‘beer’(pi,啤)has replaced part of the word for‘temper’(pi,脾)because they happen to sound the same.
文摘Think booze in China and it's not all about red faces,unwilling bajiu sessions,Tsingtao and unopened gifts of XO brandy languishing on shelves.Less in the expat purview are local national bev-erages such as huangjiu(yellow wine),mijiu(rice wine)and one that remains unexplored by most:the alcohol-drug combo,yaojiu.
