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14. The TianQin project: Current progress on science and technology

Author

Mei, J, Bai, Y, Bao, J, Barausse, E, Cai, L, Canuto, E, Cao, B, Chen, W, Chen, Y, Ding, Y, Duan, H, Fan, H, Feng, W, Fu, H, Gao, Q, Gao, T, Gong, Y, Gou, X, Gu, C, Gu, D, He, Z, Hendry, M, Hong, W, Hu, X, Hu, Y, Huang, S, Huang, X, Jiang, Q, Jiang, Y, Jiang, Z, Jin, H, Korol, V, Li, H, Li, M, Li, P, Li, R, Li, Y, Li, Z, Liang, Y, Liang, Z, Liao, F, Liu, Q, Liu, S, Liu, Y, Liu, L, Liu, P, Liu, X, Lu, X, Lu, Y, Lu, Z, Luo, Y, Luo, Z, Milyukov, V, Ming, M, Pi, X, Qin, C, Qu, S, Sesana, A, Shao, C, Shi, C, Su, W, Tan, D, Tan, Y, Tan, Z, Tu, L, Wang, B, Wang, C, Wang, F, Wang, G, Wang, H, Wang, J, Wang, L, Wang, P, Wang, X, Wang, Y, Wei, R, Wu, S, Xiao, C, Xu, X, Xue, C, Yang, F, Yang, L, Yang, M, Yang, S, Ye, B, Yeh, H, Yu, S, Zhai, D, Zhang, C, Zhang, H, Zhang, J, Zhang, L, Zhang, X, Zhou, H, Zhou, M, Zhou, Z, Zhu, D, Zi, T, Luo, J, Mei J., Bai Y. -Z., Bao J., Barausse E., Cai L., Canuto E., Cao B., Chen W. -M., Chen Y., DIng Y. -W., Duan H. -Z., Fan H., Feng W. -F., Fu H., Gao Q., Gao T., Gong Y., Gou X., Gu C. -Z., Gu D. -F., He Z. -Q., Hendry M., Hong W., Hu X. -C., Hu Y. -M., Hu Y., Huang S. -J., Huang X. -Q., Jiang Q., Jiang Y. -Z., Jiang Y., Jiang Z., Jin H. -M., Korol V., Li H. -Y., Li M., Li P., Li R., Li Y., Li Z., Li Z. -X., Liang Y. -R., Liang Z. -C., Liao F. -J., Liu Q., Liu S., Liu Y. -C., Liu L., Liu P. -B., Liu X., Liu Y., Lu X. -F., Lu Y., Lu Z. -H., Luo Y., Luo Z. -C., Milyukov V., Ming M., Pi X., Qin C., Qu S. -B., Sesana A., Shao C., Shi C., Su W., Tan D. -Y., Tan Y., Tan Z., Tu L. -C., Wang B., Wang C. -R., Wang F., Wang G. -F., Wang H., Wang J., Wang L., Wang P., Wang X., Wang Y., Wang Y. -F., Wei R., Wu S. -C., Xiao C. -Y., Xu X. -S., Xue C., Yang F. -C., Yang L., Yang M. -L., Yang S. -Q., Ye B., Yeh H. -C., Yu S., Zhai D., Zhang C., Zhang H., Zhang J. -D., Zhang J., Zhang L., Zhang X., Zhou H., Zhou M. -Y., Zhou Z. -B., Zhu D. -D., Zi T. -G., Luo J., Mei, J, Bai, Y, Bao, J, Barausse, E, Cai, L, Canuto, E, Cao, B, Chen, W, Chen, Y, Ding, Y, Duan, H, Fan, H, Feng, W, Fu, H, Gao, Q, Gao, T, Gong, Y, Gou, X, Gu, C, Gu, D, He, Z, Hendry, M, Hong, W, Hu, X, Hu, Y, Huang, S, Huang, X, Jiang, Q, Jiang, Y, Jiang, Z, Jin, H, Korol, V, Li, H, Li, M, Li, P, Li, R, Li, Y, Li, Z, Liang, Y, Liang, Z, Liao, F, Liu, Q, Liu, S, Liu, Y, Liu, L, Liu, P, Liu, X, Lu, X, Lu, Y, Lu, Z, Luo, Y, Luo, Z, Milyukov, V, Ming, M, Pi, X, Qin, C, Qu, S, Sesana, A, Shao, C, Shi, C, Su, W, Tan, D, Tan, Y, Tan, Z, Tu, L, Wang, B, Wang, C, Wang, F, Wang, G, Wang, H, Wang, J, Wang, L, Wang, P, Wang, X, Wang, Y, Wei, R, Wu, S, Xiao, C, Xu, X, Xue, C, Yang, F, Yang, L, Yang, M, Yang, S, Ye, B, Yeh, H, Yu, S, Zhai, D, Zhang, C, Zhang, H, Zhang, J, Zhang, L, Zhang, X, Zhou, H, Zhou, M, Zhou, Z, Zhu, D, Zi, T, Luo, J, Mei J., Bai Y. -Z., Bao J., Barausse E., Cai L., Canuto E., Cao B., Chen W. -M., Chen Y., DIng Y. -W., Duan H. -Z., Fan H., Feng W. -F., Fu H., Gao Q., Gao T., Gong Y., Gou X., Gu C. -Z., Gu D. -F., He Z. -Q., Hendry M., Hong W., Hu X. -C., Hu Y. -M., Hu Y., Huang S. -J., Huang X. -Q., Jiang Q., Jiang Y. -Z., Jiang Y., Jiang Z., Jin H. -M., Korol V., Li H. -Y., Li M., Li P., Li R., Li Y., Li Z., Li Z. -X., Liang Y. -R., Liang Z. -C., Liao F. -J., Liu Q., Liu S., Liu Y. -C., Liu L., Liu P. -B., Liu X., Liu Y., Lu X. -F., Lu Y., Lu Z. -H., Luo Y., Luo Z. -C., Milyukov V., Ming M., Pi X., Qin C., Qu S. -B., Sesana A., Shao C., Shi C., Su W., Tan D. -Y., Tan Y., Tan Z., Tu L. -C., Wang B., Wang C. -R., Wang F., Wang G. -F., Wang H., Wang J., Wang L., Wang P., Wang X., Wang Y., Wang Y. -F., Wei R., Wu S. -C., Xiao C. -Y., Xu X. -S., Xue C., Yang F. -C., Yang L., Yang M. -L., Yang S. -Q., Ye B., Yeh H. -C., Yu S., Zhai D., Zhang C., Zhang H., Zhang J. -D., Zhang J., Zhang L., Zhang X., Zhou H., Zhou M. -Y., Zhou Z. -B., Zhu D. -D., Zi T. -G., and Luo J.

Abstract

TianQin is a planned space-based gravitational wave (GW) observatory consisting of three Earth-orbiting satellites with an orbital radius of about $10^5 , { m km}$. The satellites will form an equilateral triangle constellation the plane of which is nearly perpendicular to the ecliptic plane. TianQin aims to detect GWs between $10^{-4} , { m Hz}$ and $1 , { m Hz}$ that can be generated by a wide variety of important astrophysical and cosmological sources, including the inspiral of Galactic ultra-compact binaries, the inspiral of stellar-mass black hole binaries, extreme mass ratio inspirals, the merger of massive black hole binaries, and possibly the energetic processes in the very early universe and exotic sources such as cosmic strings. In order to start science operations around 2035, a roadmap called the 0123 plan is being used to bring the key technologies of TianQin to maturity, supported by the construction of a series of research facilities on the ground. Two major projects of the 0123 plan are being carried out. In this process, the team has created a new-generation $17 , { m cm}$ single-body hollow corner-cube retro-reflector which was launched with the QueQiao satellite on 21 May 2018; a new laser-ranging station equipped with a $1.2 , { m m}$ telescope has been constructed and the station has successfully ranged to all five retro-reflectors on the Moon; and the TianQin-1 experimental satellite was launched on 20 December 2019 - the first-round result shows that the satellite has exceeded all of its mission requirements.

Published
2021

37. Deformation behavior of a Cu-based amorphous alloy under different strain rates.

Author

Tian, Y. B., Lin, J. G., Li, W., Ma, M., Luo, Z. C., and Jiang, W. J.

Subjects
AMORPHOUS alloys, NANOCRYSTALS, NANOSTRUCTURED materials, STRENGTH of materials, NANOPARTICLES
Abstract

The compressive deformation behavior of (Cu50Zr50)92Al8 BMG under the different strain rates ranging from 6.25 × 10-4s-1 to 2 × 10-2s-1 within the super-cooled liquid region was characterized, and the effect of the plastic deformation on the mechanical properties of the alloy was investigated. It was found that the plastic flow behavior was strongly dependent on the test temperature and applied strain rates. The BMG exhibited nearly Newtonian behavior below the strain rate of 5 × 10-3s-1 at 750K, but non-Newtonian at the high strain rates and low temperatures. The non-Newtonian plastic deformation promoted the formation of nano-crystalline in the amorphous matrix, which reduced the fracture strength of (Cu50Zr50)92Al8 BMG at room temperature. [ABSTRACT FROM AUTHOR]

Published
2011
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39. Maternal Blood Lipid Profile during Pregnancy and Associations with Child Adiposity: Findings from the ROLO Study

Author

Luo, Z-C, Geraghty, AA, Alberdi, G, O'Sullivan, EJ, O'Brien, EC, Crosbie, B, Twomey, PJ, McAuliffe, FM, Luo, Z-C, Geraghty, AA, Alberdi, G, O'Sullivan, EJ, O'Brien, EC, Crosbie, B, Twomey, PJ, and McAuliffe, FM

Abstract

BACKGROUND: The in-utero environment affects fetal development; it is vital to understand how maternal diet during pregnancy influences childhood body composition. While research indicates that triglycerides in hyperglycaemic women may increase birth weight, little is known about this relationship in euglycemic women. This study examines the relationship between maternal blood lipid status and infant adiposity up to 2 years of age. METHODS: Data from 331 mother-child pairs from the ROLO longitudinal birth cohort study was analysed. Maternal dietary intakes were recorded and fasting blood lipids, leptin and HOMA were measured in early and late pregnancy and cord blood. Infant anthropometric measurements and skin-fold thicknesses were recorded at birth, 6 months and 2 years. Correlation and regression analyses were used to explore associations between maternal blood lipid status and infant adiposity. RESULTS: All maternal blood lipids increased significantly during pregnancy. Maternal dietary fat intake was positively associated with total cholesterol levels in early pregnancy. Late pregnancy triglycerides were positively associated with birth weight (P = 0.03) while cord blood triglycerides were negatively associated with birth weight (P = 0.01). Cord HDL-C was negatively associated with infant weight at 6 months (P = 0.005). No other maternal blood lipids were associated with infant weight or adiposity up to 2 years of age. CONCLUSION: Maternal and fetal triglycerides were associated with birth weight and cord HDL-C with weight at 6 months. Thus, maternal lipid concentrations may exert in-utero influences on infant body composition. There may be potential to modulate infant body composition through alteration of maternal diet during pregnancy.

Published
2016

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