we find an explicit expression of the tutte polynomial of an $n$-fan. we also find a formula of the tutte polynomial of an $n$-wheel in terms of the tutte polynomial of $n$-fans. finally, we give an alternative expression of the tutte polynomial of an $n$-wheel and then prove the explicit formula for the tutte polynomial of an $n$-wheel.

In order to capture true-color information of distant targets under extremely low light, a large-format low-light imaging system is designed based on an RGB filter wheel. By decomposing the indicators, this study proposes method for acquiring images using large-aperture, low-distortion optical lens combined with wheel capable multi-line sequential exposure. The field segmentation achieved four-...

We find an explicit expression of the Tutte polynomial of an $n$-fan. We also find a formula of the Tutte polynomial of an $n$-wheel in terms of the Tutte polynomial of $n$-fans. Finally, we give an alternative expression of the Tutte polynomial of an $n$-wheel and then prove the explicit formula for the Tutte polynomial of an $n$-wheel.

A wear prediction model is built to research the of curved switch rail in a high-speed turnout. The Archard used analyze profile evolution law. non-Hertzian contact Kik–Piotrowski method based on virtual penetration as algorithm for model. dynamic vehicle–curved system predicted profiles and measured wheel with different stages established. effect profiles’ vehicle performance analyzed. results...

Wheel wear has been a concern in the railway for several decades. Studying the form change of the wheel/rail contacts in particular railways consisting of sharp curves helps to identify the risk of severe or catastrophic wear to minimize maintenance costs in order to be competitive in the transportation business. In this paper, the wheel/rail contact was studied on the particular railways. The ...

this study was conducted to investigate the effect of soil moisture content in primary tillage and travel speed during disking operation on the performance of an offset disk harrow in a silty clay loam soil. at first, the effect of three soil moisture content ranges of (12-14), (14-16) and (16-18) percent (dry basis) on soil clod size (left from moldboard plowing) was investigated. then, the pe...

The wear behavior of a single-layer electroplated cubic boron nitride (cBN) grinding wheel was investigated in creep feed Inconel 718 narrow-deep-groove with width 2 mm. In this paper, the protrusion height cBN grits on side edge measured by three-dimensional optical profiler, and scanning electron microscope used to detect topography worn grit nickel bonding layer. investigation results indica...

The peripheral surface of the grinding wheel can grind rail according to envelope contour surface, thus a fuller and smoother be obtained. Specifically, better effect obtained in that end face deviates from longitudinal section at certain angle. Based on traditional technology theory, mathematical models parameters (kinematic contact arc length, wheel-rail area, maximum undeformed chip thicknes...