The superconducting accelerating segment in injectorⅡof Accelerator Driven Sub-critical System(ADS) uses superconductingcavities whose frequency are 162.5 MHz. The vertical performance of superconducting cavity devic...The superconducting accelerating segment in injectorⅡof Accelerator Driven Sub-critical System(ADS) uses superconductingcavities whose frequency are 162.5 MHz. The vertical performance of superconducting cavity devicesmust be tested at liquid helium temperature(2, 4.2 K) before being assembled in cryostat. To meet the runninggoal of the 0 25 MeV linac system, it is necessary to build a set of cryogenic testing system for superconductingcavity, which is used to test the performance of the superconducting cavity and whether cavity meet the designgoal.展开更多
Genomic selection is more and more popular in animal and plant breeding industries all around the world, as it can be applied early in life without impacting selection candidates. The objective of this study was to br...Genomic selection is more and more popular in animal and plant breeding industries all around the world, as it can be applied early in life without impacting selection candidates. The objective of this study was to bring the advantages of genomic selection to scallop breeding. Two different genomic selection tools Mix P and gsbay were applied on genomic evaluation of simulated data and Zhikong scallop(Chlamys farreri) field data. The data were compared with genomic best linear unbiased prediction(GBLUP) method which has been applied widely. Our results showed that both Mix P and gsbay could accurately estimate single-nucleotide polymorphism(SNP) marker effects, and thereby could be applied for the analysis of genomic estimated breeding values(GEBV). In simulated data from different scenarios, the accuracy of GEBV acquired was ranged from 0.20 to 0.78 by Mix P; it was ranged from 0.21 to 0.67 by gsbay; and it was ranged from 0.21 to 0.61 by GBLUP. Estimations made by Mix P and gsbay were expected to be more reliable than those estimated by GBLUP. Predictions made by gsbay were more robust, while with Mix P the computation is much faster, especially in dealing with large-scale data. These results suggested that both algorithms implemented by Mix P and gsbay are feasible to carry out genomic selection in scallop breeding, and more genotype data will be necessary to produce genomic estimated breeding values with a higher accuracy for the industry.展开更多
During the year of 2014, the work of cryogenic group was mainly focused on operation of refrigerator system,test of TCM1, design and machining of HCM6. At the end of 2014 refrigerator system has achieved closed-loopop...During the year of 2014, the work of cryogenic group was mainly focused on operation of refrigerator system,test of TCM1, design and machining of HCM6. At the end of 2014 refrigerator system has achieved closed-loopoperation and recycle of helium gas, which did great contribution to superconducting cavity and superconductingmagnet test. Since the refrigerator was put into use(Fig. 1), it has operated continuously and reliably for more than5 110 h, reached helium lique ed capacity 270 L/h at 850 W.展开更多
文摘The superconducting accelerating segment in injectorⅡof Accelerator Driven Sub-critical System(ADS) uses superconductingcavities whose frequency are 162.5 MHz. The vertical performance of superconducting cavity devicesmust be tested at liquid helium temperature(2, 4.2 K) before being assembled in cryostat. To meet the runninggoal of the 0 25 MeV linac system, it is necessary to build a set of cryogenic testing system for superconductingcavity, which is used to test the performance of the superconducting cavity and whether cavity meet the designgoal.
基金supported by the National High-Tech R&D Program (863 Program No. 2012AA10A405)the earmarked fund for Modern Agro-industry Technology Research Systemthe National Natural Science Foundation of China (No. 31302182)
文摘Genomic selection is more and more popular in animal and plant breeding industries all around the world, as it can be applied early in life without impacting selection candidates. The objective of this study was to bring the advantages of genomic selection to scallop breeding. Two different genomic selection tools Mix P and gsbay were applied on genomic evaluation of simulated data and Zhikong scallop(Chlamys farreri) field data. The data were compared with genomic best linear unbiased prediction(GBLUP) method which has been applied widely. Our results showed that both Mix P and gsbay could accurately estimate single-nucleotide polymorphism(SNP) marker effects, and thereby could be applied for the analysis of genomic estimated breeding values(GEBV). In simulated data from different scenarios, the accuracy of GEBV acquired was ranged from 0.20 to 0.78 by Mix P; it was ranged from 0.21 to 0.67 by gsbay; and it was ranged from 0.21 to 0.61 by GBLUP. Estimations made by Mix P and gsbay were expected to be more reliable than those estimated by GBLUP. Predictions made by gsbay were more robust, while with Mix P the computation is much faster, especially in dealing with large-scale data. These results suggested that both algorithms implemented by Mix P and gsbay are feasible to carry out genomic selection in scallop breeding, and more genotype data will be necessary to produce genomic estimated breeding values with a higher accuracy for the industry.
文摘During the year of 2014, the work of cryogenic group was mainly focused on operation of refrigerator system,test of TCM1, design and machining of HCM6. At the end of 2014 refrigerator system has achieved closed-loopoperation and recycle of helium gas, which did great contribution to superconducting cavity and superconductingmagnet test. Since the refrigerator was put into use(Fig. 1), it has operated continuously and reliably for more than5 110 h, reached helium lique ed capacity 270 L/h at 850 W.
