Scientists often use the Chi-square (χ) test to determine the “goodness of fit” between theoretical and experimental data. In this test, we compare observed values with theoretical or expected values. Observed values are those that the researcher obtains empirically through direct observation. The theoretical or expected values are developed on the basis of an established theory or a working hy...

In this paper, motivated by Chi-Kou's weighted least-squares (WLS) Chebyshev approximation method for the design of FIR filters with linear phase, we propose a new self-initiated iterative WLS Chebyshev approximation method for the design of FIR digital filters with arbitrary complex frequency response and real filter coefficients. The proposed method not only inherits all the advantages of Chi...

The effects of input parameters on the square-cup deep-drawing process for a two-layer aluminum/steel laminated sheet were investigated. Each layer was 0.7 mm thick, and the input parameters covered in the investigation were punch nose radius (PR), die shoulder radius (DR), the clearance between a punch and die (CPD), blank holder force (BHF), and layer arrangement (LA). The effects of the inpu...

A novel topology, Current-Fed MultiResonant DC-DC Converter (CF-MRC) was studied theoretically and experimentally. The main features of the proposed converter are an inherent protection against a short circuit at the output, a high voltage gain and zero voltage switching over a iarge range of output voitage. These characteristics make it a viable choice for the implementation of a high voltage ...

das thema „orient“ besch?ftigte schon lange vor der institutionalisierung der orientforschung und entstehung von orientalistikschulen die deutschsprachige kulturszene und wurde vor allem seit der zweiten h?lfte des 18. jahrhunderts mit einem ungeheuren illusorischen potenzial intensiver denn je in literarischen werken und ubersetzungen sowie in geistesgeschichtlichen debatten thematisiert. die ...

This paper provides the estimation of the scale parameter of the exponential distribution under multiply type-II censoring. Using generalized non-informative prior and natural conjugate prior, Bayes estimator and approximate Bayes estimators of the scale parameter have been obtained under square error loss function. The proposed Bayes estimators and approximate Bayes estimators are compared wit...

es ist mehr als 100 jahre, das auf der welt die gewinnung von eisen und stahl auf basis von roheisenerzeugung im hochofen erfolgt, in letzten jahren sind die moglischkeiten zum eisengewinnung mit reduzierenden gasen auf verschiedenen verfahren untersucht und zum teil breits in halbtechnischen versuchsanlagen erprobt. in dieser arbeit wird em uberblick auf samtlichen eisengewinnungsver, fahren s...

The hydrostatic extrusion is a new method of extrusion process. The most important advantage of this method is reduction of friction and close tolerance for the coating thickness. In this study, the hydrostatic extrusion simulation of bimetallic wires has performed using of finite element method. In the following the advantages of hydrostatic extrusion compared to the direct extrusion are prese...

Forging dies at high temperatures are under contact pressure, variable mechanical loads and thermal shock, furthermore they should withstand wear and friction in a high level. So, in order to increase die life, the selection of die material, coating and hardness is essential. In this review, various methods used for die life enhancement such as carbide coating, using the super alloy stellite 6 ...

Background The performance of TVS, TRS and MRI for the diagnosis of DIE have been separately reported in earlier studies. However, the three methods have not been concurrently compared in terms of their overall performance and classified results as per different anatomical locations of DIE lesions in a large study population. This study was an attempt to compare pelvic magnetic resonance imagin...