Tests for no treatment e?ect in randomized clinical trials

Tests for no treatment e?ect in randomized clinical trials
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在随机临床试验中测试无治疗效果

DOI:
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发表时间:
1988
期刊:
影响因子:
--
通讯作者:
S. Piantadosi
S. Piantadosi
中科院分区:
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文献类型:
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作者:
M. Gail;W. Y. Tan;S. Piantadosi

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一种轴向可收缩和可膨胀的弹性波纹管,以及一种用柔性热反应性热塑性薄板材料制作波纹管的简单方法。波纹管可以包括由互锁舌和凹槽塑料带形成的可分离缝,允许安装和拆卸波纹管,而不需要进入所包含的结构的相反端。波纹管的加工包括加热材料,同时支撑在线圈或类似的材料上,使其收缩并沿着其形成深螺旋卷积。通过选择合适的形状,可以形成多种形状中的任何一种。
An axially contractable and expandable resilient bellows and a simple method of making the same from flexible heat reactive thermoplastic sheet material. The bellows may include a separable seam formed of interlocking tongue and groove plastic tapes permitting the installation and removal of the bellows without need for access to the opposite ends of the structure embraced. The processing of the bellows includes heating the material while supported on a coil or the like to shrink the same and form a deep spiralling convolution therealong. Any of a wide variety of shapes can be formed by selecting an appropriate form.
DOI: 10.2307/2531154
发表时间: 1984-01-01
期刊: BIOMETRICS
影响因子: 1.9
作者:
LAGAKOS, SW;SCHOENFELD, DA
通讯作者: SCHOENFELD, DA
DOI: --
发表时间: 1972
期刊: --
影响因子: --
作者:
D. Cox
通讯作者: D. Cox