The photometric and spectroscopic data for three double-lined detached eclipsing binaries were collected from the spectral surveys. light radial velocity curves of each binary system simultaneously analyzed by using Wilson-Devinney (WD) code, absolute physical orbital parameters these derived. masses both components ASASSN-V J063123.82+192341.9 found to be $M_1 = 1.088 \pm 0.016$ $M_2 0.883 0.0...

This study aimed to investigate the physical fitness parameters of elite Chinese male canoe slalom athletes and explore corresponding training strategies. Eight kayakers from national team were selected as research subjects. The following measured: age, height, weight, body mass index (BMI), arm span, upper circumference, fat percentage, maximum oxygen uptake, heart rate, blood lactic acid leve...

We present optical studies of the physical and wind properties, plus CNO chemical abundances, of 25 O9.5–B3 Galactic supergiants. We employ non-LTE, line blanketed, extended model atmospheres, which provide a modest downward revision in the effective temperature scale of early B supergiants of up to 1–2kK relative to previous non-blanketed results. The so-called ‘bistability jump’ at B1 (Teff ∼...

At low temperature, a thermodynamic system undergoes a phase transition when a physical parameter passes through a singularity point of the free energy. This corresponds to the formation of a new order. At high temperature, thermal fluctuations destroy the order. Correspondingly, the free energy is a smooth function of the physical parameter and singularities only occur at complex values of the...

Since the 1980s, the manufacturing environment has seen the introduction of numerous sensor/actuator bus and network protocols for automation systems, which led to increased manufacturing productivity, improved interchangeability of devices from different vendors, facilitated flexibility and reconfigurability for various applications and improved reliability, while reducing installation and mai...

This paper proposes a new parameter identification method based on Linear Fractional Transformation (LFT). It is assumed that the target linear system includes unknown parameters. The parameter deviations are separated from a nominal system via LFT, and identified by organizing I/O signals around the separated deviations of the real system. The purpose of this paper is to apply LFT to simultane...