On the basis of introduction of commonly used detection methods for hermetization, the demerits of differential pressure (D/P) measure are analyzed.
在介绍目前常用的气密性检测方法的基础上，分析了普通差压法的缺陷。
Based on P-well CMOS processes, a novel differential CMOS current conveyor is presented.
基于P阱CMOS工艺提出了一种新的差动输入电流传送器。
Results The differential diagnostic efficiency with MRI were significantly better than those with US and CT ( P<0.05) .
结果MRI对胆道梗阻性病变良恶性鉴别诊断的效能优于US和CT诊断（P<0.05）。
The relative contents of positive cells have also obvious differential (P<0.01) between FTN group or GZFL group and the rat model group, so do between FTN group and GZFL group (P<0.05).
两治疗组较模型组、两治疗中戈货孽要组之间阳性细胞相对含量也有明显差异（P<0.05）。
In this paper we will study the pseudo-differential operators P which satisfy conditions 1-4(or 4'). They constitute a class of hyperbolic operators with multi-characteristics.
本文对满足条件1-4（或4＇）的一类具重特征的双曲拟微分算子（1）进行初步的讨论。
In this paper we will study the pseudo-differential operators P which satisfy conditions 1-4(or 4'). They constitute a class of hyperbolic operators with multi-characteristics.
本文对满足条件1-4（或4＇）的一类具重特征的双曲拟微分算子（1）进行初步的讨论。
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