Subjects: Computer Science >> Integration Theory of Computer Science submitted time 2018-11-29 Cooperative journals: 《计算机应用研究》
Abstract： The linear sweeping jamming is one of the common jamming patterns in the battlefield. It is of great significance to detect the sweeping jamming and make effective anti-jamming decision. In this paper, the authors proposed a detection algorithm for sweeping jamming with low complexity under the constraint of the probability of false alarm and missed detection, and theoretically analyzed the performance of the detection algorithm to provide the basis for judging the disturbance of the actual communication system. Then, the authors proposed an anti-jamming learning algorithm based on Q-Learning, which can be used to autonomously select the best communication channel and the maximal reliable transmission time when the wireless communication system is threatened by sweeping jamming. Finally, the simulation results show that the proposed detection algorithm can effectively detect the linear sweeping jamming, and the detection performance is basically consistent with the theoretical analysis results with low complexity. The anti-jamming learning algorithm can adaptively determine the optimal communication channel, and effectively avoid the sweeping jamming to realize the reliable information transmission.
Subjects: Medicine, Pharmacy >> Clinical Medicine submitted time 2023-10-24 Cooperative journals: 《中国全科医学》
Abstract： Background The disorder of serum uric acid metabolism during pregnancy is associated with adverse pregnancy outcomes，while few studies have analyzed and compared the correlation of serum uric acid and uric acid/creatinine ratio levels with adverse pregnancy outcomes. Objective To explore the correlation of serum uric acid and uric acid/creatinine ratio levels with adverse pregnancy outcomes in late pregnancy. Methods Based on the occurrence of adverse pregnancy outcomes，the data of pregnant women with singleton live births who were routinely examined and delivered at Nanjing Drum Tower Hospital from 2015 to 2022 at a ratio of 1:1 were collected. Ultimately，a total of 743 pregnant women were collected， including 344 in the normal group and 399 in the adverse outcomes group. Serum uric acid and serum uric acid/creatinine ratio were divided into three levels by quartiles，respectively， including Q1（serum uric acid ≤ 257 μmol/L），Q2（serum uric acid 257-359 μmol/L），Q3（serum uric acid ≥ 359 μmol/L）and q1（serum uric acid/creatinine ratio ≤ 5.88），q2 （serum uric acid/creatinine ratio 5.88-7.94），q3（serum uric acid/creatinine ratio ≥ 7.94）. According to the median age of pregnant women，they were divided into the age group<30 years old（341 cases）and age group ≥ 30 years old（402 cases）. Based on previous pregnancies and deliveries，they were divided into the primiparous group（539 cases）and multiparous group （194 cases）. The correlation of serum uric acid and serum uric acid/creatinine ratio levels with adverse pregnancy outcomes was analyzed by using multivariate Logistic regression. Results Pregnant women in adverse outcomes group were older with higher levels of BMI，serum uric acid，serum uric acid/creatinine ratio and triglycerides than those in the normal group（P<0.05）. After adjustment for confounders，the multivariate Logistic regression results of the effect of serum uric acid and serum uric acid/ creatinine ratio on adverse pregnancy outcomes showed that， compared to Q1 serum uric acid level，the risk of preeclampsia （AOR=4.41，95%CI=2.16-8.99）and intrauterine growth restriction（AOR=3.59，95%CI=1.08-11.96）increased at Q3 serum uric acid level（P<0.05）；compared to q1 serum uric acid/creatinine ratio level，the risk of preeclampsia（AOR=2.33， 95%CI=1.13-4.79；AOR=3.56，95%CI=1.68-7.56） increased at q2 and q3 serum uric acid/creatinine ratio levels. Compared to q1 serum uric acid/creatinine ratio level，the risk of preterm labor（AOR=2.76，95%CI=1.33-5.71）and intrauterine growth restriction（AOR=5.15，95%CI=1.39-19.14）increased， while the risk of macrosomia（AOR=0.43，95%CI=0.19-0.98） and large for gestational age（AOR=0.38，95%CI=0.15-0.96）decreased（P<0.05）. The results of the effect of serum uric acid and serum uric acid/creatinine ratio on preeclampsia and preterm labor in different age groups showed that， compared to Q1 serum uric acid level，the risk of preeclampsia increased in both age groups at Q3 serum uric acid level（P<0.05）；compared to q1 serum uric acid/creatinine ratio level，the risk of preeclampsia increased among women aged ≥ 30 years at q2 and q3 serum uric acid/creatinine ratio level（P<0.05）. The results of the effect of serum uric acid and serum uric acid/creatinine ratio on preeclampsia and preterm labor in different pregnancies and deliveries groups showed that compared to Q1 serum uric acid level，the risk of preeclampsia increased at Q3 serum uric acid level among primiparous women（P<0.05）；compared to q1 serum uric acid/creatinine ratio level，the risk of preeclampsia increased at q2 and q3 serum uric acid/creatinine ratio level among primiparous women， as well as the risk of preterm birth at q3 serum uric acid/creatinine ratio level among primiparous women （P<0.05）. Conclusion Elevated levels of serum uric acid and serum uric acid/creatinine ratio were associated with the risk of preeclampsia and intrauterine growth restriction，in which preeclampsia mainly occurred in pregnant women aged ≥ 30 years or primiparous women. The risk of preterm labor was increased at high levels of serum uric acid/creatinine ratio， primarily in primiparous women. Serum uric acid/creatinine ratio predicted more adverse pregnancy outcomes than serum uric acid.
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