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
[目的]系统评价腹部按摩对重症病人鼻饲相关并发症的影响。[方法]系统检索相关文献,检索数据库为Cochrane图书馆、循证卫生保健国际合作中心图书馆(Joanna Briggs Institute Library,JBI)、EMbase、PubMed、CBM、Web of Science、CNKI...[目的]系统评价腹部按摩对重症病人鼻饲相关并发症的影响。[方法]系统检索相关文献,检索数据库为Cochrane图书馆、循证卫生保健国际合作中心图书馆(Joanna Briggs Institute Library,JBI)、EMbase、PubMed、CBM、Web of Science、CNKI和万方数据库;同时检索相关指南网站和专业团体网站:National Guideline Clearinghouse(NGC)和Registered Nurses’Association of Ontario(RNAO),查找有关腹部按摩对重症病人鼻饲相关并发症影响的文献。由2名研究员严格按照纳入和排除标准选择文献、评价质量和提取数据。采用RevMan 5.3软件进行Meta分析。[结果]共纳入4项随机对照试验和1项类实验性研究,包含412例研究对象。3项研究的Meta分析表明腹部按摩可以减少重症鼻饲病人的胃残留量(P<0.000 01);2项研究的Meta分析表明腹部按摩可以降低重症鼻饲病人胃潴留的发生率(P<0.000 1);4项研究的Meta分析表明腹部按摩可以降低重症鼻饲病人腹胀和呕吐的发生率(P<0.000 1);2项研究的Meta分析表明腹部按摩可以降低重症鼻饲病人呼吸机相关性肺炎(VAP)的发生率(P=0.02)。[结论]对重症鼻饲病人进行腹部按摩可以降低胃潴留、腹胀、呕吐和VAP的发生率。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[目的]系统评价腹部按摩对重症病人鼻饲相关并发症的影响。[方法]系统检索相关文献,检索数据库为Cochrane图书馆、循证卫生保健国际合作中心图书馆(Joanna Briggs Institute Library,JBI)、EMbase、PubMed、CBM、Web of Science、CNKI和万方数据库;同时检索相关指南网站和专业团体网站:National Guideline Clearinghouse(NGC)和Registered Nurses’Association of Ontario(RNAO),查找有关腹部按摩对重症病人鼻饲相关并发症影响的文献。由2名研究员严格按照纳入和排除标准选择文献、评价质量和提取数据。采用RevMan 5.3软件进行Meta分析。[结果]共纳入4项随机对照试验和1项类实验性研究,包含412例研究对象。3项研究的Meta分析表明腹部按摩可以减少重症鼻饲病人的胃残留量(P<0.000 01);2项研究的Meta分析表明腹部按摩可以降低重症鼻饲病人胃潴留的发生率(P<0.000 1);4项研究的Meta分析表明腹部按摩可以降低重症鼻饲病人腹胀和呕吐的发生率(P<0.000 1);2项研究的Meta分析表明腹部按摩可以降低重症鼻饲病人呼吸机相关性肺炎(VAP)的发生率(P=0.02)。[结论]对重症鼻饲病人进行腹部按摩可以降低胃潴留、腹胀、呕吐和VAP的发生率。
