目的探讨声振刺激后胎儿生物物理相(BPS)超声评分判断高危妊娠围生儿预后的价值。方法声振刺激后对208例高危妊娠孕妇进行BPS超声评分。结果声振刺激后胎儿BPS超声评分≤5分组中胎儿羊水污染率、1m in A pgar评分≤7分发生率、围生儿死...目的探讨声振刺激后胎儿生物物理相(BPS)超声评分判断高危妊娠围生儿预后的价值。方法声振刺激后对208例高危妊娠孕妇进行BPS超声评分。结果声振刺激后胎儿BPS超声评分≤5分组中胎儿羊水污染率、1m in A pgar评分≤7分发生率、围生儿死亡率均明显高于BPS超声评分≥6分组(P<0.05),声振刺激后胎儿BPS超声评分预测胎儿结局异常阳性值、阴性值、特异度、敏感度分别为93.94%、78.68%、98.57%、65.58%。结论声振刺激后BPS超声评分早期判断胎儿宫内缺氧状态具有准确、省时、简便、敏感性和特异性高等优点,可为临床及时纠正胎儿宫内缺氧提供可靠依据。展开更多
Cognitive radio(CR) is a promising solution to improve the spectrum utilization.The cognitive radio networks includes the primary user(PU) system with authorized spectrum and the secondly user(SU) system without autho...Cognitive radio(CR) is a promising solution to improve the spectrum utilization.The cognitive radio networks includes the primary user(PU) system with authorized spectrum and the secondly user(SU) system without authorized spectrum. When the SUs want to use the spectrum, they have to find the idle channels that are not occupied by the PUs. So the QoS of the SUs will be affected not only by the characteristic of their own business, but also by the behavior of the PUs.Currently, in order to ensure the quality of the SU services, the M-LDWF algorithm is widely used in scheduling. However, the M-LWDF algorithm didn't fully consider the difference among the SUs. For those SUs who are in the process of communication but have to change channel due to the return of the PU, they should have higher scheduling priority. In this paper, we put forward an improved algorithm based on M-LWDF. In order to guarantee the QoS of the SUs those were in the processing of communication, we gave the higher scheduling priority. Simulation results show that the improved algorithm can effectively decrease the dropping rate and improve the QoS of the SUs and the performance of the whole system.展开更多
文摘目的探讨声振刺激后胎儿生物物理相(BPS)超声评分判断高危妊娠围生儿预后的价值。方法声振刺激后对208例高危妊娠孕妇进行BPS超声评分。结果声振刺激后胎儿BPS超声评分≤5分组中胎儿羊水污染率、1m in A pgar评分≤7分发生率、围生儿死亡率均明显高于BPS超声评分≥6分组(P<0.05),声振刺激后胎儿BPS超声评分预测胎儿结局异常阳性值、阴性值、特异度、敏感度分别为93.94%、78.68%、98.57%、65.58%。结论声振刺激后BPS超声评分早期判断胎儿宫内缺氧状态具有准确、省时、简便、敏感性和特异性高等优点,可为临床及时纠正胎儿宫内缺氧提供可靠依据。
基金supported by Beijing Key Laboratory of Work Safety Intelligent Monitoring (Beijing University of Posts and Telecommunications)
文摘Cognitive radio(CR) is a promising solution to improve the spectrum utilization.The cognitive radio networks includes the primary user(PU) system with authorized spectrum and the secondly user(SU) system without authorized spectrum. When the SUs want to use the spectrum, they have to find the idle channels that are not occupied by the PUs. So the QoS of the SUs will be affected not only by the characteristic of their own business, but also by the behavior of the PUs.Currently, in order to ensure the quality of the SU services, the M-LDWF algorithm is widely used in scheduling. However, the M-LWDF algorithm didn't fully consider the difference among the SUs. For those SUs who are in the process of communication but have to change channel due to the return of the PU, they should have higher scheduling priority. In this paper, we put forward an improved algorithm based on M-LWDF. In order to guarantee the QoS of the SUs those were in the processing of communication, we gave the higher scheduling priority. Simulation results show that the improved algorithm can effectively decrease the dropping rate and improve the QoS of the SUs and the performance of the whole system.
