This paper studied the impact of moisture on the correlated characteristics of the condenser bushings oil-paper insulation system. The oil-impregnated paper samples underwent accelerated thermal aging at 130 ̋C after preparation at different initial moisture contents (1%, 3%, 5% and 7%). All the samples were extracted periodically for the measurement of the moisture content, the degree of polym...

In cases of completely conforming frictionless contact, the contact area generally either decreases or stays the same under load, in which case the extent of the contact area is subsequently independent of load and the stress and displacement fields vary linearly with the loading parameter. Dundurs and Stippes describe such cases as receding contact problems. Here, we demonstrate that similar r...

This study adopted previous fault patterns, results of detection analysis, historical records and data, and experts’ experiences to establish fuzzy principles and estimate the failure probability index of components of a power transformer. Considering that actual parameters and limiting conditions of parameters may differ, this study used the standard data of IEC, IEEE, and CIGRE as condition p...

3-Dimensional elbow implant was built with SOLIDWORKS 2014 and the finite element analysis was performed with ANSYS. Designs of elbow implants were compared based on the linked, semi-constrained elbow implant design that was chosen and built in this study. The daily activities was said to be achieved within range of 30 degrees to 130 degrees of angle of flexion. Three common angles were picked ...

There is heterogeneity in the propensity of smokers to develop chronic obstructive pulmonary disease (COPD), and improved treatment strategies are hindered by limited understanding of COPD pathogenesis, especially as distinct from the effects of smoking per se. Although apoptosis is essential for tissue homeostasis, increased apoptosis may cause tissue damage and inflammation. This study addres...

Small end bearings are a critical component of reciprocating engines, and the performance their lubrication directly affects engines’ reliability mechanical efficiency. There many factors that influence lubrication. A new type small-end bearing test rig was developed to reveal key influencing on characteristics, multi-body dynamic model coupled with elastohydrodynamic (EHD) characteristics buil...

The bacterial flagellar motor is embedded in the cytoplasmic membrane, and penetrates the peptidoglycan layer and the outer membrane. A ring structure of the basal body called the P ring, which is located in the peptidoglycan layer, is thought to be required for smooth rotation and to function as a bushing. In this work, we characterized 32 cysteine-substituted Escherichia coli P-ring protein F...

Abstract The purpose of this study is to further the dynamic characteristics gun turret under firing load. Firstly, relative motion between inner ring and outer was decomposed into axial translational motion, radial rotational freedom in two orthogonal planes order solve problem large number ball bearings complex contact calculation actual structure ring. Then, equivalent mathematical model est...