We focus on the Mach–Zehnder interferometer(MZI) with the input of a coherent beam and one of the bright entangled twin beams with an external power reference beam employed for measurement. The results show that the ...We focus on the Mach–Zehnder interferometer(MZI) with the input of a coherent beam and one of the bright entangled twin beams with an external power reference beam employed for measurement. The results show that the phase sensitivity can reach sub-Heisenberg limit and approach quantum Cramer–Rao bound by changing the squeezing parameters and the photon number of the coherent beam, under the phase-matching condition. The absence of the external power reference beam will degrade the performance of the phase sensitivity. Meanwhile, this scheme shows good robustness against the losses of the photon detectors. We present a detailed discussion about the phase sensitivities when the inputs are two coherent beams, or a coherent beam plus a single-mode squeezed vacuum beam based on the MZI. This scenario can be applied in the field of phase precision measurements and other optical sensors.展开更多
背景:骨盆、髋臼骨折常用的手术治疗方式包括髂腹股沟入路及改良Stoppa入路,选择何种入路更为安全有效仍存在争议,需要循证医学证据来评价不同入路方式的优缺点。目的:比较改良Stoppa入路与髂腹股沟入路治疗骨盆、髋臼骨折的临床疗效。...背景:骨盆、髋臼骨折常用的手术治疗方式包括髂腹股沟入路及改良Stoppa入路,选择何种入路更为安全有效仍存在争议,需要循证医学证据来评价不同入路方式的优缺点。目的:比较改良Stoppa入路与髂腹股沟入路治疗骨盆、髋臼骨折的临床疗效。方法:计算机检索Cochrane library、Pub Med、Embase、OVID、中国期刊网全文数据库(CNKI)、万方数据库、中国生物医学文献数据库(CBM)及维普中数据库(VIP)建库至2016年10月间,有关改良Stoppa入路与髂腹股沟入路治疗骨盆、髋臼骨折的随机对照试验。采用Rev Man 5.3软件对纳入文献进行合成分析。结果与结论:(1)最终纳入了11篇随机对照试验,总共722例患者;(2)最终Meta分析的结果示:改良Stoppa入路组手术时间、术中出血量、手术切口长度、伤口引流量、住院时间均小于或少于髂腹股沟入路组(P<0.05),且临床疗效显著(P<0.05);2组在术后并发症、Matta评分方面差异无显著统计学意义(P>0.05);(3)由此可见,改良Stoppa入路是治疗骨盆、髋臼骨折更为安全有效的方法。展开更多
基金Project supported by the National Natural Science Foundation of China (Grant Nos.12104190,12104189,and 12204312)the Natural Science Foundation of Jiangsu Province (Grant No.BK20210874)+2 种基金the Jiangsu Provincial Key Research and Development Program (Grant No.BE2022143)the Jiangxi Provincial Natural Science Foundation (Grant Nos.20224BAB211014 and 20232BAB201042)the General Project of Natural Science Research in Colleges and Universities of Jiangsu Province (Grant No.20KJB140008)。
文摘We focus on the Mach–Zehnder interferometer(MZI) with the input of a coherent beam and one of the bright entangled twin beams with an external power reference beam employed for measurement. The results show that the phase sensitivity can reach sub-Heisenberg limit and approach quantum Cramer–Rao bound by changing the squeezing parameters and the photon number of the coherent beam, under the phase-matching condition. The absence of the external power reference beam will degrade the performance of the phase sensitivity. Meanwhile, this scheme shows good robustness against the losses of the photon detectors. We present a detailed discussion about the phase sensitivities when the inputs are two coherent beams, or a coherent beam plus a single-mode squeezed vacuum beam based on the MZI. This scenario can be applied in the field of phase precision measurements and other optical sensors.
文摘背景:骨盆、髋臼骨折常用的手术治疗方式包括髂腹股沟入路及改良Stoppa入路,选择何种入路更为安全有效仍存在争议,需要循证医学证据来评价不同入路方式的优缺点。目的:比较改良Stoppa入路与髂腹股沟入路治疗骨盆、髋臼骨折的临床疗效。方法:计算机检索Cochrane library、Pub Med、Embase、OVID、中国期刊网全文数据库(CNKI)、万方数据库、中国生物医学文献数据库(CBM)及维普中数据库(VIP)建库至2016年10月间,有关改良Stoppa入路与髂腹股沟入路治疗骨盆、髋臼骨折的随机对照试验。采用Rev Man 5.3软件对纳入文献进行合成分析。结果与结论:(1)最终纳入了11篇随机对照试验,总共722例患者;(2)最终Meta分析的结果示:改良Stoppa入路组手术时间、术中出血量、手术切口长度、伤口引流量、住院时间均小于或少于髂腹股沟入路组(P<0.05),且临床疗效显著(P<0.05);2组在术后并发症、Matta评分方面差异无显著统计学意义(P>0.05);(3)由此可见,改良Stoppa入路是治疗骨盆、髋臼骨折更为安全有效的方法。
