目的运用Meta分析系统评价新生儿脑损伤与围生期感染关联性,明确脑损伤的病因,以尽早对脑损伤新生儿进行干预及治疗,改善其远期预后。方法检索的数据库包括:CBM、知网、维普、万方、PubMed、Web of Science、Cochrane Library、Embase,...目的运用Meta分析系统评价新生儿脑损伤与围生期感染关联性,明确脑损伤的病因,以尽早对脑损伤新生儿进行干预及治疗,改善其远期预后。方法检索的数据库包括:CBM、知网、维普、万方、PubMed、Web of Science、Cochrane Library、Embase,纳入有关围生期感染对新生儿脑损伤影响的研究。文献检索日期截至2020年10月9日。采用固定(随机)效应模型对各个文献报告的研究结果进行合并,并计算比值比(OR值)及相应95%的可信区间(CI)。查找异质性原因及分析潜在的发表偏倚。结果共纳入文献14篇,均为病例对照研究。Meta分析得出的结果示,宫内感染组OR值为4.13[95%CI:3.18~5.37],母亲妊娠期感染性疾病组OR值为9.15[95%CI:5.42~15.45],新生儿感染组OR值为3.04[95%CI:2.24~4.11]。结论发生新生儿脑损伤时,合并感染的风险较高,即新生儿脑损伤与围生期感染有关。展开更多
We propose aΛ-type superconducting three-energy-level device-based communication system for extremely weak microwave communication scenarios,for example,long-distance deep-space communication.We provide a system diag...We propose aΛ-type superconducting three-energy-level device-based communication system for extremely weak microwave communication scenarios,for example,long-distance deep-space communication.We provide a system diagram and propose the frame synchronization and power estimation approaches based on pre-defined synchronization sequences.Based on the microwave response characteristics of the superconducting three-energy-level system,we further investigate the optimization of synchronization sequence and information symbol modulation.We show that three-energy-level systems with weak Markovianity can be approximated using independent identical distribution methods to obtain optimal synchronization sequences,and the optimal modulation is asymmetric.The proposed system design and optimization approaches are evaluated by numerical results.Moreover,we investigate the performance of the three-energy-level communication system in the presence of interference.Simulation results show that the three-energy-level communication system can tolerate more than 10 dB interference compared to long term evolution(LTE)systems and achieve the same communication rate for the same bandwidth and temperature.展开更多
文摘目的运用Meta分析系统评价新生儿脑损伤与围生期感染关联性,明确脑损伤的病因,以尽早对脑损伤新生儿进行干预及治疗,改善其远期预后。方法检索的数据库包括:CBM、知网、维普、万方、PubMed、Web of Science、Cochrane Library、Embase,纳入有关围生期感染对新生儿脑损伤影响的研究。文献检索日期截至2020年10月9日。采用固定(随机)效应模型对各个文献报告的研究结果进行合并,并计算比值比(OR值)及相应95%的可信区间(CI)。查找异质性原因及分析潜在的发表偏倚。结果共纳入文献14篇,均为病例对照研究。Meta分析得出的结果示,宫内感染组OR值为4.13[95%CI:3.18~5.37],母亲妊娠期感染性疾病组OR值为9.15[95%CI:5.42~15.45],新生儿感染组OR值为3.04[95%CI:2.24~4.11]。结论发生新生儿脑损伤时,合并感染的风险较高,即新生儿脑损伤与围生期感染有关。
基金the National Natural Science Foundation of China.62171428Key Research Program of Frontier Sciences of CAS.QYZDY-SSW-JSC003。
文摘We propose aΛ-type superconducting three-energy-level device-based communication system for extremely weak microwave communication scenarios,for example,long-distance deep-space communication.We provide a system diagram and propose the frame synchronization and power estimation approaches based on pre-defined synchronization sequences.Based on the microwave response characteristics of the superconducting three-energy-level system,we further investigate the optimization of synchronization sequence and information symbol modulation.We show that three-energy-level systems with weak Markovianity can be approximated using independent identical distribution methods to obtain optimal synchronization sequences,and the optimal modulation is asymmetric.The proposed system design and optimization approaches are evaluated by numerical results.Moreover,we investigate the performance of the three-energy-level communication system in the presence of interference.Simulation results show that the three-energy-level communication system can tolerate more than 10 dB interference compared to long term evolution(LTE)systems and achieve the same communication rate for the same bandwidth and temperature.
