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探讨二维超声联合四维彩超超高细微分辨血流技术(HD-flow)彩色血流显像在产前诊断先天性心脏发育异常中的临床应用价值。方法 选取2016年7月至2018年2月在小榄人民医院行产前超声检查并分娩的单胎妊娠孕妇2 200例，先对所有入组的孕妇进行二维超声检查，二维超声检查提示胎儿疑似宫内心脏发育异常的孕妇再联合应用四维彩超HD-flow彩色血流显像进行检查。将进行二维超声的检查结果作为对照组，将二维...
Assignment of resonances in dissociative recombination of HD+ ions: high-resolution measurements compared with accurate computations
Assignment of resonances dissociative recombination high-resolution measurements accurate computations
2011/8/11
Abstract: The collision-energy resolved rate coefficient for dissociative recombination of HD+ ions in the vibrational ground state is measured using the photocathode electron target at the heavy-ion ...
Distillation of hydrogen isotopes for polarized HD target
Polarized target, HD gas, Hydrogen isotope, Distillation,Heli-pack,Isotope separation
2011/9/1
We have developed a cryogenic distillation system to purify Hydrogen-Deuteride (HD) gas for a polarized HD target in LEPS experiments at SPring-8. A small amount of ortho-H2 (0.01%) in the HD gas pla...
Infrared dynamic polarizability of HD+ rovibrational states
Infrared dynamic polarizability rovibrational
2011/8/31
A calculation of dynamic polarizabilities of rovibrational states with vibrational quantum number v = 0 − 7 and rotational quantum number J = 0, 1 in the 1sヲg ground-state potential of HD+ is pr...
Development of Polarized HD Target for Future LEPS Experiments at SPring8
strangeness photon target
2009/10/29
We are carrying out hadron photoproduction experiments by using polarized photon beams at SPring8 in Japan. In 2005, westarted developing a polarized HD target for future experiments using both the p...
基于LTS-HD的像素跳跃式快速景象匹配算法
Hausdorff距离 多级匹配 遗传算法 逐点匹配
2010/9/27
LTS-HD（least trimmed square Hausdorff distance ）是景象匹配辅助导航系统中一种鲁棒性较好的相似性测度，但其计算的复杂性往往不能满足导航系统对实时性的要求。针对这一问题，在分析Hausdorff距离特性的基础上，提出了一种两级实时景象匹配算法。与传统各种利用图像多尺度特征的多级匹配方法不同，该算法利用Hausdorff 距离特性直接在原分辨率图像上进行匹...