Wyniki wyszukiwania - Biblioteka Nauki

1

Stanowisko badawcze kolektorów słonecznych

100%

Wrońska A. , Błaszczak J.

Zeszyty Naukowe. Cieplne Maszyny Przepływowe - Turbomachinery / Politechnika Łódzka

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2005

|

tom nr 127

75-82

PL

Celem artykułu jest przedstawienie potrzeb przemawiających za budową stanowiska badawczego kolektorów słonecznych, na bazie aktualnych tendencji w energetyce oraz analizy potrzeb rynku. Artykuł zawiera schemat stanowiska oraz metody wyznaczania podstawowych parametrów kolektora wraz z przykładowymi wynikami badań. Zaprezentowano tu również analizę kosztów oraz korzyści, jakie dla Politechniki Łódzkiej, studentów oraz całego regionu niesie za sobą wykorzystanie omawianego stanowiska.

EN

The main task of this paper is to present the needs for building solar collector test rig basing on modern tendencies in power engineering and market analysis. The paper includes the schema of proposed laboratory test rig and a method of determining the main parameters of solar collector together with result example. Test rig cost analysis and benefits for Technical University of Lodz, students and for whole region are also presented.

2

Smart Cooling Controlled System Exploiting Photovoltaic Renewable Energy Systems

80%

Atieh A. , Al Asfar J. , Tawalbeh N. , Shaqour E. , Alsalhi I. , Istaiteh O.

Journal of Ecological Engineering

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2018

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tom Vol. 19, nr 2

39--44

EN

A smart cooling system to control the ambient temperature of a premise in Amman, Jordan, is investigated and implemented. The premise holds 650 people and has 14 air conditioners with the cooling capacity ranging from 3 to 5 ton refrigerant (TR) each. The control of the cooling system includes implementing different electronics circuits that are used to sense the ambient temperature and humidity, count the number of people in the premise and then turn ON/OFF certain air conditioner(s). The data collected by different electronic circuits are fed wirelessly to a microcontroller, which decides which air conditioner will be turned ON/OFF, its location and its desired set cooling temperature. The cooling system is integrated with an on-grid solar photovoltaic energy system to minimize the operational cost of the overall cooling system.

3

Организационно-экономическая оптимизация эксплуатации сельскохозяйственных систем водоснабжения в Республике Беларусь

80%

Хмель E.

Ekonomia i Zarządzanie

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2014

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tom Vol. 6, no. 4

271--281

RU

Организационно-экономическая оптимизация эксплуатации сельскохозяйственных систем водоснабжения заключается в анализе процесса эксплуатации, разработке моделей позволяющих его реализовать на высоком уровне с минимальными затратами и создании алгоритма выбора оптимальной организационной модели эксплуатации исходя из факторов внешней и внутренней среды предприятий сельского хозяйства и перерабатывающей промышленности АПК в области водоснабжения.

EN

Organizational and economic optimization of the exploitation of agricultural water supply system consists in the analysis of the process of operation, the development of models allowing to maintain a high level of operation with minimal cost and the selection of the optimal algorithm for creating an organizational model based on the exploitation of the factors in the external and internal environment of agricultural enterprises.

4

Benefit and cost analysis of investment variants with the AHP method

80%

Szymaczek M. , Iskierka S.

Poznan University of Technology Academic Journals. Electrical Engineering

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2009

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tom No 59

17-24

5

When and whom is profitable a consignment store?

80%

Banyai A. , Banyai T. , Cselenyi J.

Mechanics and Mechanical Engineering

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2002

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tom Vol. 6, nr 2

9-16

EN

Within the frame of this paper the authors will summarise the operation of consignment stores. Because of the additional costs of operation of logistic processes by the aid of consignment stores, it is necessary to analyse the costs of establishment and operation of consignment stores form the point of view suppliers and customers. This paper will concentrate on the costs causes by storage, transport and purchasing processes, and the authors try to answer the question: in which cases are consignment stores profitable not only for the customers but also for the suppliers?

6

Oil transport in port. Part 0. Port oil piping transportation system safety without outside impacts

80%

Kołowrocki K. , Kuligowska E. , Soszyńska-Budny J. , Torbicki M.

Journal of Polish Safety and Reliability Association

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2018

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tom Vol. 9, No. 2

1--10

EN

The paper is concerned with the model of critical infrastructure safety prediction without considering outside impacts. The general approach to the prediction of critical infrastructure safety is proposed and the safety indicators are defined for a critical infrastructure free of any outside impacts. Moreover, there is presented the model application for port oil piping transportation system safety prediction. Further, the cost analysis of critical infrastructure operation process is proposed and applied to the considered piping system.

7

Econometric model for analysing the cost of failures of technical objects operated within the municipal public transport system

80%

Stawicki J. , Woropay M.

Archives of Transport

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1999

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tom Vol. 11, iss.1-2

63-72

EN

The paper presents the principles of cost analysis for failures of technical objects on the basis of a regression model. A model to test actual municipal transport systems was suggested and developed. The analysis of results obtained from the model was presented in the form of equations and charts.

PL

W artykule przedstawiono zasady analizy kosztów uszkodzeń obiektów technicznych na podstawie modelu regresyjnego. Model wykorzystano w badaniach miejskiego systemu transportowego. Uzyskane wyniki zostały przedstawione w formie równań i wykresów.

8

Oil transport in port. Part 2. Port oil piping transportation system safety and resilience impacted by the climate-weather change process

70%

Kołowrocki K. , Kuligowska E. , Soszyńska-Budny J. , Torbicki M.

Journal of Polish Safety and Reliability Association

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2018

|

tom Vol. 9, No. 2

29--42

EN

The paper is concerned with the application of the model of critical infrastructure safety prediction with considering its climate-weather change impacts. The general approach to the prediction of critical infrastructure safety and resilience is proposed and the safety and resilience indicators are defined for a critical infrastructure impacted by climate-weather change process. Moreover, there is presented the model application for port oil piping transportation system safety and resilience prediction. Further, the cost analysis of critical infrastructure impacted by climate-weather change process is proposed and applied to the considered piping system.

9

Performance assessment of industrial system (African Textile Manufacturers, LTD) through copula linguistic approach

70%

Abubakar M. I. , Singh V. V.

Operations Research and Decisions

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2019

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tom Vol. 29, No. 4

5--22

EN

This paper deals with the performance assessment of a textile industry, namely African Textile Manufactures (ATM) Ltd., in Chalawa, Kano industrial estate, Federal Republic of Nigeria. The entire system ATM has different sections of machines for processing various assignments. The machines in the sections have diverse capabilities. We assumed the following subsystems: spinning, weaving, pretreatment, printing, and steaming. The failure rates of subsystems are constant, and they follow exponential distribution, while the repairs follow two types of distributions, namely general distribution and Gumbel–Hougaard family copula distribution. The system analyzed by employing supplementary variable and the Laplace transform. Various measures of reliability have been computed for differential values of failures and two types of repair. The conclusions and some recommendations are addressed to improving the management of ATM.

10

Integrated software tools supporting decision making on identification,prediction and optimization of complex technical systems operation,reliability and safety. Part 6. Integrated software tools application – Exemplary system operation cost analysis and maintenance optimization

70%

Blokus-Roszkowska A. , Kołowrocki K. , Salahuddin H. M.

Journal of Polish Safety and Reliability Association

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2011

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tom Vol. 2, No. 2

323--336

EN

The integrated software tools are applied to the exemplary system operation cost analysis and maintenance optimization. Using the computer program CP 8.12 there is obtained the evaluation of the cost before and after the exemplary system operation process optimization and next the computer program CP 8.13 is applied for operation cost analysis of the improved exemplary system. The methods of corrective and preventive maintenance policy maximizing availability and minimizing renovation cost of the complex technical systems in variable operation conditions are illustrated for the analyzed exemplary system using equivalently the computer program CP 8.14 for maintenance policy maximizing system availability and CP 8.15 for minimizing system renovation cost.

11

Performance assessment of industrial system (African Textile Manufacturers, LTD) through copula linguistic approach

70%

ABUBAKAR M. I. , SINGH V. V.

Operations Research and Decisions

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2019

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tom 29

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nr 4

5-22

EN

This paper deals with the performance assessment of a textile industry, namely African Textile anufactures (ATM) Ltd., in Chalawa, Kano industrial estate, Federal Republic of Nigeria. The entire system ATM has different sections of machines for processing various assignments. The machines in the sections have diverse capabilities. We assumed the following subsystems: spinning, weaving, pretreatment, printing, and steaming. The failure rates of subsystems are constant, and they follow exponential distribution, while the repairs follow two types of distributions, namely general distribution and Gumbel–Hougaard family copula distribution. The system analyzed by employing supplementary variable and the Laplace transform. Various measures of reliability have been computed for differential values of failures and two types of repair. The conclusions and some recommendations are addressed to improving the management of ATM.

12

Studies on the ANN implementation in the macro BIM cost analyzes

70%

Juszczyk M.

Przegląd Naukowy. Inżynieria i Kształtowanie Środowiska

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2017

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tom 26

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nr 2[76]

EN

Studies on the ANN implementation in the macro BIM cost analyzes. The paper presents an approach which combines the concept of macro-level BIM-based cost analyzes analyzes and application of artificial intelligence tools – namely artificial neural networks. Discussion and foundations of the proposed approach are introduced in the paper to clarify the problem’s core. An exemplary case study reports the results of initial studies on the application of neural networks for the purposes of BIM-based cost analysis of a buildings’ fl oor structural frame. The results obtained justify the proposal of application of neural networks as a supportive mathematical tool in the problem presented in the paper.

PL

O możliwościach zastosowania SSN w analizach kosztowych „macro BIM”. Artykuł przedstawia podejście, w którym połączono koncepcję analiz kosztowych macro BIM z zastosowaniem narzędzi sztucznej inteligencji – sztucznych sieci neuronowych. W artykule zaprezentowano dyskusję i podstawowe założenia proponowanego podejścia stanowiące wyjaśnienie istoty problemu. Studium przypadku przedstawia wyniki wstępnych badań dotyczących różnego zastosowania sieci neuronowych w analizach kosztów z zastosowaniem BIM na przykładzie oszacowań kosztów konstrukcji nośnej kondygnacji budynku. Uzyskane wyniki uzasadniają propozycję wykorzystania sieci neuronowych jako narzędzia matematycznego rozwiązywania problemu przedstawionego w artykule.

13

Analiza kosztów stacji uzdatniania wód podziemnych i powierzchniowych

60%

Miłaszewski R.

Instal

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2015

|

tom nr 7/8

74--76

PL

W referacie omówiono metodykę przeprowadzania analizy kosztów funkcjonowania stacji uzdatniania wód podziemnych i powierzchniowych. Analiza ta obejmuje badania wielkości jednostkowych nakładów inwestycyjnych na budowę stacji uzdatniania wód powierzchniowych i podziemnych oraz jednostkowych kosztów ich eksploatacji. Badania obejmują również zależności pomiędzy jednostkowymi nakładami inwestycyjnymi a wydajnością stacji uzdatniania, jak również jednostkowymi kosztami eksploatacji a ilością uzdatnianej wody. Ważną częścią analizy jest badanie struktury rocznych kosztów eksploatacji stacji uzdatniania wód podziemnych i powierzchniowych. Badania kosztów zostały wykonane dla różnych grup stacji uzdatniania wody w zależności od stosowanych technologii. W referacie zaprezentowano przykładowe rezultaty tych badań.

EN

The paper discusses methods for analysis of the operational costs of ground and surface water treatment plants. These analyses include evaluation of the level of unit investment outlays on construction of surface and groundwater treatment plants and the unit costs of their operation. The study also comprises the relationship between unit investment outlays and the capacity of treatment plants as well as unit operational costs and treated water quantity. An important part of the analysis is the study of the structure of the annual operational costs of groundwater and surface water treatment plants. Analysis of the costs for different groups of water treatment plant are made, depending on the technology used. Examples of the study results are discussed in the paper.

14

Analiza doboru źródła ciepła w budynku jednorodzinnym

60%

Szymiczek J.

Rynek Instalacyjny

|

2019

|

tom Nr 3

67--71

PL

Artykuł poświęcony jest doborowi źródła ciepła w budynku jednorodzinnym oraz analizie parametrów tego źródła. Przedstawiono przykładowy budynek, dla którego przeprowadzono analizę kosztów skumulowanych produkcji ciepła za pomocą trzech różnych narzędzi obliczeniowych. Dla wybranego na podstawie kosztów skumulowanych urządzenia - powietrznej pompy ciepła - przeprowadzono procedurę doboru mocy grzewczej. Pokazano wybrane urządzenia spełniające przyjęte założenia.

EN

The article is devoted to selection of heat source for a single-family building and choice of the parameters of the heat source. It presents an analysis of exemplary building accumulated heating expenses using three different tools. The procedure of calculating heating power of chosen heat source - air heat pump, based on accumulated heating expenses. Last part is selection of available devices meeting the chosen assumptions.

15

Economic effectiveness evaluation of the free piston Stirling engine-based micro-combined heat and power unit in relation to classical systems

60%

Uchman W. , Remiorz L. , Kotowicz J.

Archives of Thermodynamics

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2019

|

tom Vol. 40, no 1

71--83

EN

In this article, a comparison of economic effectiveness of various heating systems dedicated to residential applications is presented: a natural gas-fueled micro-cogeneration (micro-combined heat and power – µCHP) unit based on a free-piston Stirling engine that generates additional electric energy; and three so-called classical heating systems based on: gas boiler, coal boiler, and a heat pump. Calculation includes covering the demand for electricity, which is purchased from the grid or produced in residential system. The presented analyses are partially based on an experimental investigation. The measurements of the heat pump system as well as those of the energy (electricity and heat) demand profiles in the analyzed building were conducted for a single-family house. The measurements of the µCHP unit were made using a laboratory stand prepared for simulating a variable heat demand. The overall efficiency of the µCHP was in the range of 88.6– 92.4%. The amounts of the produced/consumed energy (electricity, heat, and chemical energy of fuel) were determined. The consumption and the generation of electricity were settled on a daily basis. Operational costs of the heat pump system or coal boiler based heating system are lower comparing to the micro-cogeneration, however no support system for natural gas-based µCHP system is included.

16

Jakimi metodami budować sieć wodociągową? : analiza kosztów budowy metodami tradycyjnymi i bezwykopowymi

60%

Piechurski F. G. , Turniak T.

Inżynieria Bezwykopowa

|

2016

|

tom nr 3

106--111

PL

Decyzja związana z wyborem metody budowy sieci powinna zostać poprzedzona szczegółowymi analizami, m.in. kosztowymi. W opisywanych przypadkach analizy obejmowały budowę sieci wodociągowej w trzech różnych lokalizacjach. Ich celem było ustalenie, czy pod względem kosztów lepiej skorzystać z rozwiązania tradycyjnego wykopowego czy zastosować bezwykopową metodę HDD.

EN

Any decision regarding the choice of construction method for a network should be preceded by detailed analyses, including cost analysis. In the cases described in the article, analyses were conducted for the construction of a water supply system in three different locations in order to determine whether it would be more cost-effective to use traditional methods or HDD trenchless technology. Based on these comparative analyses of the construction costs, in the case of all three planned investments, the HDD trenchless method generated lower costs than traditional excavation.

17

Record-based inference and associated cost analysis for the Weibull distribution

60%

Doostparast M.

Control and Cybernetics

|

2015

|

tom Vol. 44, no. 1

163--177

EN

In statistical process control, record schemes are used to reduce the total time on test for the inspection inquiry. In these schemes, units are examined sequentially and successive minimum values are recorded. On the basis of record data, Samaniego and Whitaker (1986) obtained the maximum likelihood (ML) estimate of the mean for an exponential distribution. Since the two parameter Weibull model, as an extension of the exponential distribution, has a wide range of application, Hoinkes and Padgett (1994) derived the record-based ML estimators for the parameters of interest in this model. This paper shows that the ML estimates of the Weibull parameters do not always exist for the basis of records. Thus, a new scheme is proposed, in which the ML estimates of the parameters always exist. An analytic cost-based comparison between the usual and the New scheme is also carried out. Finally, some concluding remarks and open problems are formulated.

18

Profitability of coarse cereals production in India

60%

Ayalew B. , Sekar I.

International Letters of Natural Sciences

|

2015

|

tom 39

EN

This study was aimed at investigating profitability of selected coarse cereals production in major producing states of India through analyzing cost, return and profitability of coarse cereals cultivation. Cost concepts and farm business income measures used for analysis the data ranging from 1980-81 to 2011-12. Net return of coarse cereals cultivation was observed to be highest for maize and it was highest in Bihar (Rs. 15,429/ha) and lowest Uttar Pradesh (Rs. -4,006/ha). Net return from cultivation of sorghum was found to be highest in Andhra Pradesh (Rs. 952/ha) and lowest for Madhya Pradesh (Rs. -1,456/ha). For pearl millet net return was highest in Andhra Pradesh (Rs. 4,995/ha) and lowest for Karnataka (Rs. -1,252/ha) whereas cultivation of finger millet was observed to be at a loss.

19

Finansowanie najdroższych terapii lekowych w Polsce a problemy w dostępie do nich. Analiza poziomu finansowania i opłacalności programów terapeutycznych

60%

Seweryn M. , Koperny M. , Drobisz-Miętkiewicz A.

|

nr 2

97–104

EN

One of the most discussed topics about organization of the Polish health care system is providing full accessibility to the financing of the latest drug therapies. According to the institutions implementing the programs most serious causes of problems in access to innovative pharmacotherapy are too low level of funding programs and their low profitability, or even hospitals pay the extra to such benefits. Due to the increasingly high cost of treatment of severe illnesses and ongoing development of new medical technologies, in choosing the method of treatment are taken into account the results of economic analyzes. The authors, by analyzing the level of funding and implementation of treatment programs, have attempted to answer the question whether the claims are true, and health care providers and Polish patients have equal access to the most expensive drug therapies? To verify the above hypothesis also performed an cost analysis of selected therapeutic programs. Cost analysis conducted based on the identification and analysis of the costs of four therapeutic health programs indicated that the refund value of National Health Fund for providers implementing health programs may be substantially higher than the costs incurred by them. The current way of financing most expensive innovation therapy has many weaknesses, but most frequently mentioned causes of the problems with the availability of treatment programs are not supported by actual data.

20

Oil transport in port. Part 1. Port oil piping transportation system safety and resilience impacted by its operation process

60%

Kołowrocki K. , Kuligowska E. , Soszyńska-Budny J. , Torbicki M.

Journal of Polish Safety and Reliability Association

|

2018

|

tom Vol. 9, No. 2

11--28

EN

The paper is concerned with the model of critical infrastructure safety prediction with considering its operation process impacts. The general approach to the prediction of critical infrastructure safety and resilience is proposed and the safety and resilience indicators are defined for a critical infrastructure impacted by its operation process. Moreover, there is presented the model application for port oil piping transportation system safety and resilience prediction. Further, the cost analysis of critical infrastructure operation process is proposed and applied to the considered piping system.