As a result of the exponential growing rate of worldwide Internet usage, satellite systems are required to support broadband Internet applications. The transmission control protocol （TCP） which is widely used in the...As a result of the exponential growing rate of worldwide Internet usage, satellite systems are required to support broadband Internet applications. The transmission control protocol （TCP） which is widely used in the Internet, performs very well on wired networks. However, in the case of satellite channels, clue to the delay and transmission errors, TCP performance degrades significantly and bandwidth of satellite links can not be fully utilized. To improve the TCP performance, a new idea of placing a TCP spoofing proxy in the satellite is considered. A Novel Satellite Transport Protocol （NSTP） which takes advantage of the special properties of the satellite channel is also proposed. By using simulation, as compared with traditional TCPs, the on-board spoofing proxy integrated with the special transport protocol can significantly enhance throughput performance on the high BER satellite link, the time needed to transfer files and the bandwidth used in reverse path are sharply reduced.展开更多
【目的】比较常规控制性卵巢刺激(COS)和微刺激方案在卵巢低反应(POR)患者行体外受精-胚胎移植(IVF-ET)中的临床结局。【方法】前瞻入组行体外受精/卵胞浆内单精子注射(ICSI)治疗的卵巢低反应患者随机分为两组,COS组选择促性腺激素释放...【目的】比较常规控制性卵巢刺激(COS)和微刺激方案在卵巢低反应(POR)患者行体外受精-胚胎移植(IVF-ET)中的临床结局。【方法】前瞻入组行体外受精/卵胞浆内单精子注射(ICSI)治疗的卵巢低反应患者随机分为两组,COS组选择促性腺激素释放激素激动剂(GnRH-a)修饰长方案,微刺激方案组选择来曲唑(LE)添加小剂量促性腺激素(Gn)行卵巢刺激,比较两组患者促排效果及临床妊娠结局差异。【结果】COS组患者扳机日子宫内膜厚度(mm)和扳机日血清雌二醇(E2)水平(pg/mL)显著高于微刺激组,分别为11.4±2.5 vs. 9.6±2.5、1200±710 vs. 560±470,差异均有统计学意义(P<0.05);两组扳机日血清黄体生成素(LH)、孕激素(P)水平差异无统计学意义(P>0.05);COS组患者获卵数(4.1±2.8 vs. 2.8±1.9)和可利用胚胎数(2.0±1.6 vs. 1.5±1.4)均多于微刺激组,差异有统计学意义(P<0.05);两组的胚胎种植率,每移植周期、每取卵周期以及每启动周期的临床妊娠率,流产率,活产率差异均无统计学意义(P>0.05)。【结论】在POR患者促排治疗中,微刺激方案和COS方案相比有相近的临床妊娠率。而微刺激方案可节约Gn用量、缩短促排卵时间。因此微刺激方案是POR患者较理想的促排卵方案。展开更多
文摘As a result of the exponential growing rate of worldwide Internet usage, satellite systems are required to support broadband Internet applications. The transmission control protocol （TCP） which is widely used in the Internet, performs very well on wired networks. However, in the case of satellite channels, clue to the delay and transmission errors, TCP performance degrades significantly and bandwidth of satellite links can not be fully utilized. To improve the TCP performance, a new idea of placing a TCP spoofing proxy in the satellite is considered. A Novel Satellite Transport Protocol （NSTP） which takes advantage of the special properties of the satellite channel is also proposed. By using simulation, as compared with traditional TCPs, the on-board spoofing proxy integrated with the special transport protocol can significantly enhance throughput performance on the high BER satellite link, the time needed to transfer files and the bandwidth used in reverse path are sharply reduced.
文摘【目的】比较常规控制性卵巢刺激(COS)和微刺激方案在卵巢低反应(POR)患者行体外受精-胚胎移植(IVF-ET)中的临床结局。【方法】前瞻入组行体外受精/卵胞浆内单精子注射(ICSI)治疗的卵巢低反应患者随机分为两组,COS组选择促性腺激素释放激素激动剂(GnRH-a)修饰长方案,微刺激方案组选择来曲唑(LE)添加小剂量促性腺激素(Gn)行卵巢刺激,比较两组患者促排效果及临床妊娠结局差异。【结果】COS组患者扳机日子宫内膜厚度(mm)和扳机日血清雌二醇(E2)水平(pg/mL)显著高于微刺激组,分别为11.4±2.5 vs. 9.6±2.5、1200±710 vs. 560±470,差异均有统计学意义(P<0.05);两组扳机日血清黄体生成素(LH)、孕激素(P)水平差异无统计学意义(P>0.05);COS组患者获卵数(4.1±2.8 vs. 2.8±1.9)和可利用胚胎数(2.0±1.6 vs. 1.5±1.4)均多于微刺激组,差异有统计学意义(P<0.05);两组的胚胎种植率,每移植周期、每取卵周期以及每启动周期的临床妊娠率,流产率,活产率差异均无统计学意义(P>0.05)。【结论】在POR患者促排治疗中,微刺激方案和COS方案相比有相近的临床妊娠率。而微刺激方案可节约Gn用量、缩短促排卵时间。因此微刺激方案是POR患者较理想的促排卵方案。
