Average L-shell fluorescence yields of some rare earth elements were determined using HPGe detector employing reflection geometry set up. Target atoms were excited using 59.5 keV gamma rays emerging from Am-241 source...Average L-shell fluorescence yields of some rare earth elements were determined using HPGe detector employing reflection geometry set up. Target atoms were excited using 59.5 keV gamma rays emerging from Am-241 source of strength 300 mCi. Background radiation and multiple scattering effects were minimized by properly shielding the detector. The elemental foils of uniform thickness and 99.9% purity were used in the present investigation. The fluorescent spectra were recorded in a 16 K multichannel - analyzer. The data were carefully analyzed and average L-shell fluorescence yields were calculated. The resulting yield values are compared with the available experimental and theoretical values.展开更多
This study investigates the language strategies used by Shakespeare in The Tragedy of Hamlet, Prince of Denmark （1603）. Emphasis is given to the type of language or register Shakespeare provides his characters with ...This study investigates the language strategies used by Shakespeare in The Tragedy of Hamlet, Prince of Denmark （1603）. Emphasis is given to the type of language or register Shakespeare provides his characters with in order to give them genuine or assumed identities. The linguistic register of the three major characters of Claudius, the Ghost, and Hamlet is explored in light of the Elizabethan cultural context. This concern with these three characters stems from the basic assumption of the paper that the play is a struggle between Claudius and the Ghost over Hamlet. Claudius speaks the language of a monarch which is informed by the code of society; the Ghost, who used to speak such language of sovereignty while alive, speaks a language of the dead informed by a newly acquired experience not familiar to human beings. On the other hand, Hamlet＇s use of language is the most peculiar in the play. His register keeps changing according to his tragic growth and his readiness for action. The study indicates that the language functions Shakespeare utilizes in Hamlet are numerous. Language is used creatively for a variety of purposes in addition to communication. The playwright employs language as a shield for self-defense, a tool for defining and hiding identity and misleading and manipulating others, a means of search for reality, and a tool for punishment, among other functions. The study findings invite further research into Shakespeare＇s use of language in his plays. No detailed in-depth studies of Shakespearean language and its implications exist.展开更多
In the application of multiple-processor systems some processors or links in a system maynot function properly,thus the fault diagnosis is one of the most important issues in the analysisand maintenance of those syste...In the application of multiple-processor systems some processors or links in a system maynot function properly,thus the fault diagnosis is one of the most important issues in the analysisand maintenance of those systems.For the practical fault diagnosis systems,the probability that allneighboring processors of a processor are faulty simultaneously is very small.Thus,the conditionaldiagnosability,which is a new metric for evaluating such systems,assumes that every fault set doesnot contain all neighbors of any processor in the system.In this paper,the authors show that then-dimensional shuffle-cube has the conditional diagnosability of 4n-15 for n = 2 (mod 4) and n ≥ 10.展开更多
Based on the transmission electron micrographs of nacre, the existence of mineral bridges in the organic matrix interface is confirmed. It is proposed that the microarchitecture of nacre should be considered as a “br...Based on the transmission electron micrographs of nacre, the existence of mineral bridges in the organic matrix interface is confirmed. It is proposed that the microarchitecture of nacre should be considered as a “brick-bridge-mortar” (BBM) arrangement rather than traditional “brick and mortar” (BM) one. Experiments and analyses indicate that the mineral bridges effectively affect the strength and toughness of the interfaces in nacre. Comparison with a laminated composite with BM structure, SiC/BN, shows that the pattern of the crack extension and the toughening mechanism of the two materials are different. This reveals that the mineral bridges play a key role in the toughening mechanisms of nacre, which gives a conceptual guidance in material synthesis.展开更多
文摘Average L-shell fluorescence yields of some rare earth elements were determined using HPGe detector employing reflection geometry set up. Target atoms were excited using 59.5 keV gamma rays emerging from Am-241 source of strength 300 mCi. Background radiation and multiple scattering effects were minimized by properly shielding the detector. The elemental foils of uniform thickness and 99.9% purity were used in the present investigation. The fluorescent spectra were recorded in a 16 K multichannel - analyzer. The data were carefully analyzed and average L-shell fluorescence yields were calculated. The resulting yield values are compared with the available experimental and theoretical values.
文摘This study investigates the language strategies used by Shakespeare in The Tragedy of Hamlet, Prince of Denmark （1603）. Emphasis is given to the type of language or register Shakespeare provides his characters with in order to give them genuine or assumed identities. The linguistic register of the three major characters of Claudius, the Ghost, and Hamlet is explored in light of the Elizabethan cultural context. This concern with these three characters stems from the basic assumption of the paper that the play is a struggle between Claudius and the Ghost over Hamlet. Claudius speaks the language of a monarch which is informed by the code of society; the Ghost, who used to speak such language of sovereignty while alive, speaks a language of the dead informed by a newly acquired experience not familiar to human beings. On the other hand, Hamlet＇s use of language is the most peculiar in the play. His register keeps changing according to his tragic growth and his readiness for action. The study indicates that the language functions Shakespeare utilizes in Hamlet are numerous. Language is used creatively for a variety of purposes in addition to communication. The playwright employs language as a shield for self-defense, a tool for defining and hiding identity and misleading and manipulating others, a means of search for reality, and a tool for punishment, among other functions. The study findings invite further research into Shakespeare＇s use of language in his plays. No detailed in-depth studies of Shakespearean language and its implications exist.
基金supported by the National Natural Science Foundation of China under Grant Nos. 10701074,10531070, 10771209, and 10721101in part by Sciences Foundation for Young Scholars of Beijing Normal University+1 种基金in part by priority discipline of Beijing Normal Universityin part by Chinese Academy of Sciences under Grant No. kjcx-yw-s7
文摘In the application of multiple-processor systems some processors or links in a system maynot function properly,thus the fault diagnosis is one of the most important issues in the analysisand maintenance of those systems.For the practical fault diagnosis systems,the probability that allneighboring processors of a processor are faulty simultaneously is very small.Thus,the conditionaldiagnosability,which is a new metric for evaluating such systems,assumes that every fault set doesnot contain all neighbors of any processor in the system.In this paper,the authors show that then-dimensional shuffle-cube has the conditional diagnosability of 4n-15 for n = 2 (mod 4) and n ≥ 10.
基金the National Natural Science Foundations of China (Grant Nos. 19891180 and 10072067) and the Natural Science Foundation of Chinese Academy of Sciences (KJ951-1-201) .
文摘Based on the transmission electron micrographs of nacre, the existence of mineral bridges in the organic matrix interface is confirmed. It is proposed that the microarchitecture of nacre should be considered as a “brick-bridge-mortar” (BBM) arrangement rather than traditional “brick and mortar” (BM) one. Experiments and analyses indicate that the mineral bridges effectively affect the strength and toughness of the interfaces in nacre. Comparison with a laminated composite with BM structure, SiC/BN, shows that the pattern of the crack extension and the toughening mechanism of the two materials are different. This reveals that the mineral bridges play a key role in the toughening mechanisms of nacre, which gives a conceptual guidance in material synthesis.
