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转动部件低速转动平稳性的研究 被引量:2
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作者 黄其圣 《机械设计》 CSCD 北大核心 1998年第2期7-8,共2页
本文通过数学力学分析,得出了转动部件低速转动时临界运动均匀性系数AC与运动系统阻尼比ξ的关系。并提出了低速转动的平稳性不仅与运动系统的摩擦特性有关,还与工作阻力矩的变化有关。
关键词 转动部件 低速运动 平稳性 阻力矩 摩擦
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Comparison of PAMG-1 and phIGFBP-1 Tests for the Prediction of Preterm Delivery in Patients with Preterm Labor
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作者 Marija Hadzi-Lega Josephine Theresia Maier +3 位作者 Hanns Helmer Lars Hellmeyer Ana Daneva Markova Anastasika Poposka 《Open Journal of Obstetrics and Gynecology》 2017年第3期358-368,共11页
Objective: To compare PAMG-1 and phIGFBP-1 tests in predicting impending spontaneous preterm delivery within 7 days upon presentation in pregnant women with symptoms of preterm labor. Study Design: From September 2014... Objective: To compare PAMG-1 and phIGFBP-1 tests in predicting impending spontaneous preterm delivery within 7 days upon presentation in pregnant women with symptoms of preterm labor. Study Design: From September 2014 to April 2015 women with singleton gestation, symptoms of preterm labor, GA 22 - 35, participated in this prospective cohort study upon admission. Recruited patients had intact membranes and a minimal cervical dilatation of ≤3 cm. Vaginal swabs for phIGFBP-1 and PAMG-1 were taken in addition to routine treatment. Biochemical test results were blinded and had no effect on management of patients. Results: A total of 96 patients were screened for inclusion into the trial;57 met the inclusion criteria for final analysis. The PAMG-1 test was positive in 5.7% of patients, while phIGFBP-1 test was positive in 29.8% of patients. The prediction of spontaneous preterm delivery within 7 days of admission in patients with a cervical length Conclusion: Our study supports the high negative predictability of biochemical tests to rule out spontaneous preterm labor in patients with a short cervix. However, our study strongly suggests that the PAMG-1 test is more accurate for predicting imminent spontaneous preterm delivery as compared to phIGFBP-1. These findings can significantly reduce economic burden caused by unnecessary admission and treatment of patients suspected of preterm labor. Such a reduction in the use of corticosteroids and tocolytics would lead to a reduction in the short and long term health effects associated with the use of therapeutic drugs like corticosteroids, antibiotics and tocolytics. 展开更多
关键词 PRETERM Labour/Labor PRETERM BIRTH phIGFBP-1 parto Sure PAMG-1
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