The peak fields of HT-7U TF/PF coils are designed at 5.8 T and 4.5 T, respectively. The superconducting (SC) NbTi/Cu strands for the coils have a quite low copper fraction (0.58). To increase the ratio of the limiting...The peak fields of HT-7U TF/PF coils are designed at 5.8 T and 4.5 T, respectively. The superconducting (SC) NbTi/Cu strands for the coils have a quite low copper fraction (0.58). To increase the ratio of the limiting current Vs. critical current for the cable in conduit conductor (CICC), the first-stage subcable consists of several copper strands twisted around a SC composite one. The copper strand diameter is different from the SC one. Based on Bottura's CICC design approach we take the product of total copper cross-section and wetted perimeter as one of the key design parameters to meet with stability margin requirement. The product reaches 114 cm3 for 15.5 kA TF CICC at operating temperature of 4.2 K and 139 cm3 for 15 kA PF CICC at 3.8 K to obtain stability margins of 280 and 700 mJ/cm3, respectively.展开更多
The new version of“Dreamlike Lijiang”is now on stage with a brand-new appearance in Guilin,Guangxi,China. The show has been performing successfully over four years so far! As a leading role in the local show market,...The new version of“Dreamlike Lijiang”is now on stage with a brand-new appearance in Guilin,Guangxi,China. The show has been performing successfully over four years so far! As a leading role in the local show market,“Dreamlike Lijiang”has become a successful quintessence during the last four years,with its popularity and the applause from the audiences.As a famous brand in show industry,“展开更多
Since the application of the new curriculum,the English teaching material of the national junior high school is no longer unified.Thus,there come numerous junior high school English tesching materials,such as Renjiao,...Since the application of the new curriculum,the English teaching material of the national junior high school is no longer unified.Thus,there come numerous junior high school English tesching materials,such as Renjiao,Beijing Normal University,Oxford,Cambridge,New Concept,Ren’ai and so on and so forth.These abundant teaching materials offer the majority of teachers and students a broad choice space and are different from the traditional teaching material.Among these materials,Ren’ai version is introduced to Zhangzhou City,Fujian Province.Compared with the traditional teaching materials,Ren’ai version has a new form both in language and content,which put forward to higher request on teachers and students.As is published recently,there is not much related research.This article,on one hand,makes a brief analysis on the characteristics of the material.On the other hand,it gives some suggestions on how to handle the material with the help of Constructivism,the Task-based Teaching theory and Cognitive Psychology,hoping to improve the efficiency of classroom teaching and the students’English comprehensive ability.展开更多
文摘The peak fields of HT-7U TF/PF coils are designed at 5.8 T and 4.5 T, respectively. The superconducting (SC) NbTi/Cu strands for the coils have a quite low copper fraction (0.58). To increase the ratio of the limiting current Vs. critical current for the cable in conduit conductor (CICC), the first-stage subcable consists of several copper strands twisted around a SC composite one. The copper strand diameter is different from the SC one. Based on Bottura's CICC design approach we take the product of total copper cross-section and wetted perimeter as one of the key design parameters to meet with stability margin requirement. The product reaches 114 cm3 for 15.5 kA TF CICC at operating temperature of 4.2 K and 139 cm3 for 15 kA PF CICC at 3.8 K to obtain stability margins of 280 and 700 mJ/cm3, respectively.
文摘The new version of“Dreamlike Lijiang”is now on stage with a brand-new appearance in Guilin,Guangxi,China. The show has been performing successfully over four years so far! As a leading role in the local show market,“Dreamlike Lijiang”has become a successful quintessence during the last four years,with its popularity and the applause from the audiences.As a famous brand in show industry,“
文摘Since the application of the new curriculum,the English teaching material of the national junior high school is no longer unified.Thus,there come numerous junior high school English tesching materials,such as Renjiao,Beijing Normal University,Oxford,Cambridge,New Concept,Ren’ai and so on and so forth.These abundant teaching materials offer the majority of teachers and students a broad choice space and are different from the traditional teaching material.Among these materials,Ren’ai version is introduced to Zhangzhou City,Fujian Province.Compared with the traditional teaching materials,Ren’ai version has a new form both in language and content,which put forward to higher request on teachers and students.As is published recently,there is not much related research.This article,on one hand,makes a brief analysis on the characteristics of the material.On the other hand,it gives some suggestions on how to handle the material with the help of Constructivism,the Task-based Teaching theory and Cognitive Psychology,hoping to improve the efficiency of classroom teaching and the students’English comprehensive ability.
