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您的检索式：作者名="Tianchen Hu"
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| 1 | Chinese Fetal Growth:A Multicenter Cohort Study Based on Fetal Ultrasound Measurements显示文摘Objective:To build a reference fetal growth chart for the Chinese population based on fetal ultrasound measurements.Methods:This was a multicenter,population-based retrospective cohort study.Longitudinal ultrasound measurement data were collected from 24 hospitals in 18 provinces of China from 1st September through 31st October of 2019.The estimated fetal weight(EFW)was calculated based on head circumference,abdominal circumference,and femur length using Hadlock formula 3.Fetal growth curves were estimated using a two-level linear regression model with cubic splines.All participants were divided into two groups:the northern group(n=5829)and the southern group(n=3246)based on the geographical division of China and male fetus group(n=4775)and female fetus group(n=4300)based on fetal gender.The EFW was compared by fetal gender and geographical group.All statistical models were adjusted for maternal sociodemographic characteristics.Results:A total of 9075 participants with 31,700 ultrasound measurement records were included in this study.Male fetuses demonstrated significantly larger EFW compared to female ones starting at 16 weeks of gestation and extending to delivery(global testP<0.01).The overall geographic difference in EFW was significant(global testP=0.03),and week-specific comparisons showed that the northern group had a greater EFW starting at 15 weeks of gestation and extending to 29 weeks of gestation,although this difference did not extend to the time of delivery.TheZ-score of EFW confirmed that our Chinese fetal growth charts differed from previously published standards.Conclusion:This study provides EFW and ultrasound biometric reference measurements for Chinese fetuses and reveals differences from other fetal growth charts.The chart is worth promoting in more regions of China but should be tested prudently before use. | Xiaoli Gong Tianchen Wu Xiaoli Wang Lizhen Zhang Yiping You Hongwei Wei Xifang Zuo Ying Zhou Xinli Xing Zhaoyan Meng Qi Lyu Zhaodong Liu Jian Zhang Liyan Hu Junnan Li Li Li Chulin Chen Chunyan Liu Guoqiang Sun Aiju Liu Jingsi Chen Yuan Lyu Yuan Wei Yangyu Zhao | 2023 | Maternal-Fetal Medicine2023，5，1： | 0 |
| 2 | Revealing the frequency-dependent oscillations in the nonlinear terahertz response induced by the Josephson current显示文摘Nonlinear responses of superconductors to intense terahertz radiation has been an active research frontier.Using terahertz pump-terahertz probe spectroscopy,we investigate the c-axis nonlinear optical response of a high-temperature superconducting cuprate.After excitation by a single-cycle terahertz pump pulse,the reflectivity of the probe pulse oscillates as the pump-probe delay is varied.Interestingly,the oscillatory central frequency scales linearly with the probe frequency,a fact widely overlooked in pump-probe experiments.By theoretically solving the nonlinear optical reflection problem on the interface,we show that our observation is well explained by the Josephson-type third-order nonlinear electrodynamics,together with the emission coefficient from inside the material into free space.The latter results in a strong enhancement of the emitted signal whose physical frequency is around the Josephson plasma edge.Our result offers a benchmark for and new insights into strong-field terahertz spectroscopy of related quantum materials. | Sijie Zhang Zhiyuan Sun Qiaomei Liu Zixiao Wang Qiong Wu Li Yue Shuxiang Xu Tianchen Hu Rongsheng Li Xinyu Zhou Jiayu Yuan Genda Gu Tao Dong Nanlin Wang | 2023 | National Science Review2023，10，11： | 0 |
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