Anti-vibration bars (AVBs) are essential components of a steam generator (SG) and used to prevent tubes (SGTs) from vibrating intensely because flow-induced vibration. However, the contact force generated at surfaces between AVBs can change natural frequency wear behavior tube. Contact is represented by clamping in this study. Considering effect on sliding distance SGT, dynamic under different ...

During the operation of vibrating mechanism, push-shaking camellia fruit picking manipulator needs to ensure a constant force output clamping hydraulic motor in order make sure that tree trunk wouldn't loosen or damage, which may affect its later growth, during process. In this regard, paper derived state space model valve-controlled system manipulator, and fuzzy wavelet neural network (FWNN) w...

The control of clamping force has a significant influence on the braking performance low-floor trams. However, load torque variations, strong nonlinearity and complex structure electromechanical brake (EMB) systems present challenging issues. In this paper, an EMB system mathematical model is established. Then, enhanced sliding-mode reaching law (ESMRL) investigated to address these addition, n...

Abstract A detailed finite element (FE) model of M20 bolted joint is established. Using the FE model, loosening processes under different transverse vibration amplitude are simulated. The results show that there exists a critical amplitude. When smaller than amplitude, will not loosen. it larger is, faster loosens. Based on clamping force, nut rotation angle, bolt torsion deformation and slip t...

Background: The timing of umbilical cord clamping may affect the need to bloodtransfusion and other morbidities of preterm infants. This study aimed to compare three different cord clamping timing (immediate cord clamping, delayed cord clamping and umbilical cord milking) in preterm infants delivered by cesarean section (CS). <em...

The influence of calcium concentration in the bathing solution on the force-velocity relations of the isolated, electrically excited cat papillary muscle was examined. Shortening velocity was directly measured at minimum loads by unloading or load clamping the muscle from the preload (at the length, Lmax, where maximum active tension was developed) to 0 (zero-load clamp), 2, 5, 10, and 15% of t...

Piezoelectric materials capable of converting between mechanical and electrical energy have a great range of potential applications in micro- and nano-scale smart devices; however, their performance tends to be greatly degraded when reduced to a thin film due to the large clamping force by the substrate and surrounding materials. Herein, we report an effective method for synthesizing isolated p...

Many serious accidents are reported about the manual window cleaning task, and it is needed to automate the task for the majority of windows having no special guide frames for window cleaning machines. This paper proposes a novel tethered window cleaning robot named a “SkyScraper-I” and discusses its design. The SkyScraper-I has the functions to approach all the windows located on one side of a...

Coatings of specific materials in few atoms of thickness to several microns on certain substrate is the basic need of society and they attend the regular attention of scientific community working in different domains; decorative and protective coatings, transparent and insulating coatings, coating medical implants and surgical instruments, coatings for drug delivery and security purposes, ultra...