Wyniki wyszukiwania - BazTech

1

Warehouse Management Problem and a KPI Approach: a Case Study

Marziali Micaela, Rossit Daniel Alejandro, Toncovich Adrián

Management and Production Engineering Review

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2021

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Vol. 13, No. 3

51--62

EN

Warehouse and inventory management is a recurring issue in many of the different supply chains in diverse industries, where the constant changes in the markets have a direct impact on the management of warehouses and inventories, either generating over-stocks or shortages. This paper presents a case study on warehouse and inventory management control. The company under study was having problems in this area, where over-stocks were generated frequently, leading to various incidents, such as having to store finished and packaged product in unsuitable places, with the associated risk of deterioration. To deal with this problem, control tools based on the KPI (Key Performance Indicator) concept were developed. To this end, the corresponding problem and the information management process within the Supply Chain department had to be analyzed. In this case, it was observed that the databases were not synchronized, therefore strategies were proposed to systematize the collection and updating of data. In addition, to summarize the information, we proceeded to the implementation of an interactive form that facilitates the visualization and interpretation of the evolution of the process, and to be able to apply an efficient control on it, and thus to propose corrective actions supported by evidence.

2

Optymalizacja nieokresowa i okresowa z wykorzystaniem pochodnych sterowania

Nizioł J., Piekarski Z., Wójcik W.

Czasopismo Techniczne. Nauki Podstawowe

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2009

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R. 106, z. 1-NP

197-207

PL

W niniejszym artykule przedstawiono rozwiązanie problemu optymalizacji dla przypadku, gdy na funkcje sterujące nałożone są warunki brzegowe. Aby rozwiązać to zagadnienie, trzeba założyć, ze sterowanie jest ciągłe. Wtedy można je zastąpić przez dodatkowe zmienne stanu spełniające odpowiednie warunki. W przedstawionej metodzie nowym sterowaniem stają się pochodne pierwotnych funkcji sterowania. Jako przykład teoretyczny została przeanalizowana optymalizacja okresowa drgań swobodnych pręta sprężystego. Przekrój poprzeczny tego pręta jest sterowaniem, które na swoim początku i końcu ma określone wartości. Przyjmujemy, że nowe sterowanie jest okresowe. Problem rozwiązany został za pomocą zmodyfikowanej zasady maksimum, która takie okresowe sterowanie pozwala obliczać.

EN

In the paper for the case when control functions fulfil the definite boundary conditions the optimization is investigated. In order to solve this problem we assume that the control is continuous. This can be substituted by additional state variables. In this method the derivatives of the primitive controls are new functions. As the theoretical example the periodic optimization of the vibrating elastic bar has been researched. The cross - section is the control which has date values on the beginning and the end of the interval. We assume that the new control is periodic. The problem of the periodic optimization on the basis of the modified maximum principle has been solved.

3

Modelowanie systemów sterowania ruchem kolejowym - struktury informacji i elementy opisu formalnego

Zabłocki W.

Prace Naukowe Politechniki Warszawskiej. Transport

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2006

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z. 57

23-48

PL

W publikacji przedstawiono zarys formalizacji systemu srk oraz podstawowe struktury informacji istotne w opisie tego systemu. Struktury informacji są podstawą konstrukcji relacji, które zostaną zastosowane do sformułowania funkcji sterowania w systemie srk.

EN

This paper presents a method of the formalization and the setting of values of the interlocking function for a ststic structure which contains the information about the conflict of railroads. This information about the structure is essential when describing the relationship between different traffic control systems at the station, as well as for creating control functions.

4

Stability properties of monomial functions

Budzik D.

Annales Societatis Mathematicae Polonae. Seria 1: Commentationes Mathematicae

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2002

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[Z] 42(2)

183-198

EN

A map M defined on a semigroup (group, Banach space etc.) S and taking values in an Abelian group is called monomial of degree at most n whenever Δny M (x) = n!M (y), where Δny stands for the n-th iterate of the usual difference operator Δy. We are looking for conditions upon a map F from S into a real normed linear space, controlled by ƒ in the sense that || n!F (y) - Δny F(x) || ≤ n!ƒ (y) - Δny ƒ(x), to be uniformly approximated by monomial mapping of degree at most n.

5

Modular function spaces and control functions of almost everywhere convergence

Kita H., Miyamoto T., Yoneda K.

Annales Societatis Mathematicae Polonae. Seria 1: Commentationes Mathematicae

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2001

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[Z] 41

99-133

EN

The modular spaces have been studied by many authors. In this paper we consider the modular function spaces which provide a generalization of Banach function spaces, and discuss some relations between properties of these spaces and control functions of almost everywhrere convergence of functions in modular function spaces. We give a necessary and sufficient condition for a control function to be in the same modular function space as functions appearing in almost everywhere convergence.