填料塔广泛地使用于气—液操作过程中,例如吸收和蒸馏。传质传递比或气—液平衡决定了塔的高度,而流体动力学条件则决定了塔的直径。本文介绍了一种快速估算直径的方法。仅需已知质量流量,物理特性和填料特性数据。液泛速变是基准,当填料因子（F）已知时,在液泛状态下气体表面的质量流速（G’）可出下述的以SI单位制表示的经验关系式求得:
Objective: We report our 8-year experience with the endovascular procedure for patients with thoracoabdominal aortic aneurysms,dissections and Takayasus arteritis.We also evaluate and discuss the outc
Objective: To explore the security and the short term efficacy of VIABAHN stents branches area lesions in lower extremity arterial diseases.Methods: From November 2014 to June 2015,the data of 16 pati
Background:Magnetic resonance-guided focused ultrasound(MRgFUS)is becoming increasingly popular in different disciplines worldwide.
Objective: Spontaneous isolated dissection of the superior mesenteric artery(SIDSMA)is increasingly detected recently.Conservative treatment is now recommended as first choice for uncomplicated SIDSMA
Objective: To investigate the individualized treatment options on patients with variceal bleeding caused by portal hypertension.Materials and Methods: From January 2009 to December 2015,a consecutive
Objective: The purpose of this study was to assess the characteristics of fenestration malformation in vertebrobasilar artery a8 revealed by magnetic resonance angiography image(MRA)studies.
Purpose: To evaluate selective embolization for management of post-traumatic priapism and colour Doppler sonography and MRI for the diagnosis of the causative lesion and for planning embolization.