Wyniki wyszukiwania - BazTech

1

Ocena ryzyka robót dodatkowych w budowie infrastruktury kolejowej

Leśniak Agnieszka, Janowiec Filip

Materiały Budowlane

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2022

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nr 10

68--70

PL

Artykuł prezentuje autorskie podejście do oceny ryzyka robót dodatkowych w przedsięwzięciach kolejowych. Opracowana baza danych posłużyła do budowy i kalibracji modelu w postaci sieci bayesowskiej. Zdefiniowano kluczowe zdarzenia dotyczące robót dodatkowych. W przypadku każdego z nich określono warianty w węzłach sieci i prawdopodobieństwo ich wystąpienia. Zaproponowano 3 poziomy ryzyka. Przekroczenie przyjętego poziomu referencyjnego oznacza ryzyko nieakceptowalne i wymaga podjęcia działań zapobiegawczych.

EN

This article presents a proprietary approach to the risk assessment of additional works in the railway construction projects. The developed database was used to build and calibrate the model as a Bayesian network. The key events causing additional works were defined. Variants in nodes of network and probability of occurrence were determined for each of them. Three levels of risk were proposed. Exceeding the defined reference level means an unacceptable risk and requires taking preventive actions.

2

Evaluation system of rural sustainable tourism land based on ecosystem service value

Mei Rong, Han Lirong

Ecological Chemistry and Engineering. S

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2022

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Vol. 29, nr 3

347--363

EN

With the development of the economy, people’s living standards are getting higher and higher. People will look for ways to relax after busy work, and rural tourism is a slow-paced life. The purpose of this paper is to analyse the evaluation system of rural sustainable tourism land based on ecosystem service value. In this paper, an evaluation model based on AHP and association rules is proposed, and the two methods are described in detail. The experimental results of this paper show that the number of tourists has increased from 12 % in 2014 to 24.9 % in 2020, and the growth rate of tourism revenue has increased from 24 % in 2014 to 30 % in 2020. Rural tourism is an important part of tourism and an important force to implement the strategy of rural revitalisation. It plays an important role in accelerating the modernisation of agriculture and rural areas, the integrated development of urban and rural areas, and poverty alleviation in poor areas. The number of farm stays has increased from 1.9 million in 2014 to 3.25 million in 2020. It can be seen that with the growth of time, the rapid development of the economy, and increasing people who love to travel, this has led to changes in the utilisation rate of rural land. Therefore, the research on the evaluation system of rural sustainable tourism land based on ecosystem service value is very meaningful.

3

Economic development model and effective path of green industry

Tian Wen, Zhang Xin

Ecological Chemistry and Engineering. S

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2022

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Vol. 29, nr 3

403--418

EN

Major crises such as greenhouse effect and resource depletion remind people that environmental protection is imminent. However, the economic growth is always accompanied by the destruction of the environment, so the development of green industry economy is very necessary for the balance between the two. However, many of today’s green industry economic development is still in the theoretical stage, and there are no substantive measures. Therefore, this paper aims to build a reasonable development evaluation model for the green industry economy, and use the results of the model to explore the sustainable development of the green industry economy. In view of this, in the stage of proposing the model, this paper refers to a large number of literature and field investigation, and selects 30 suitable evaluation indexes. The experimental results of the green industrial economy in Sichuan Province with the designed model show that the comprehensive evaluation index of green economic development has increased steadily. It reached 0.8255 in 2016, which is in line with the actual situation. This shows that the model in this paper has a good fitting effect, and can provide guidance for the economic development model and effective path of green industry.

4

Performance evaluation model and algorithm of green supply chain management based on sustainable computing

He Chao

Ecological Chemistry and Engineering. S

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2021

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Vol. 28, nr 4

499--512

EN

How to facilitate collaborative development between the enterprise and the environment under the dual constraints of resources and the environment is the focus of today's green supply chain management system research. Through the performance evaluation of the green supply chain, we can understand the operation of the whole supply chain and its shortcomings, provide a basis for improving related processes, and have important practical significance for improving the competitiveness and protection of its products. First of all, by summarising and analysing the research status of sustainable supply chain management in different countries, the research idea and overall background of this paper are proposed. It discusses the theory of sustainable supply chain management and the performance evaluation system and calculation types of sustainable supply chain management. Finally, the relative weight of each index is determined based on the sustainability calculation method, and then the decentralisation degree of the index is constructed. During this period, the fuzzy comprehensive evaluation method is used to evaluate the performance of sustainable supply chain, conduct case analysis and summary, and evaluate the performance of green supply chain component in economic, social, environmental and other aspects. In this paper, representative companies are selected as examples to evaluate their green supply chain management performance, and the evaluation algorithm is studied based on sustainable calculation method. The results show that a reasonable and effective evaluation of the enterprise performance of green supply chain management and a sustainable algorithm study can effectively identify potential problems in the operation of the company and improve the overall operation of the company at this stage.

5

A decision support tool for a walkable integrated neighbourhood design using a multicriteria decision-making method.

Keyvanfar A., Shafaghat A., Lamit H.

Zeszyty Naukowe. Transport / Politechnika Śląska

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2018

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z. 100

45--68

EN

Growing concern about transportation emissions and energy security has persuaded urban professionals and practitioners to pursue non-motorized urban development. They need an assessment tool to measure the association between the built environment and pedestrians’ walking behaviour more accurately. This research has developed a new assessment tool called the Walkable Integrated Neighbourhood Design (WIND) support tool, which interprets the built environment’s qualitative variables and pedestrians’ perceptual qualities in relation to quantifiable variables. The WIND tool captures and forecasts pedestrians’ mind mapping, as well as sequential decision-making during walking, and then analyses the path walkability through a decision-tree-making (DTM) algorithm on both the segment scale and the neighbourhood scale. The WIND tool measures walkability by variables clustered into five features, 11 criteria and 92 subcriteria. The mind-mapping analysis is presented in the form of a ‘Walkability_DTM-Mind-mapping sheet’ for each destination and the overall neighbourhood. The WIND tool is applicable to any neighbourhood cases, although it was applied to the Taman Universiti neighbourhood in Malaysia. The tool’s outputs aid urban designers to imply adaptability between the neighbourhood environment and residents’ perceptions, preferences and needs.

6

Evaluation model of the companies operating within logistic network

Foltin P., Gontarczyk M., Świderski A., Zelkowski J.

Archives of Transport

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2015

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Vol. 36, iss. 4

21--33

EN

In the paper authors presented concept of evaluation of complex systems such as logistic companies which operate in competitive environment. Authors also highlighted the importance of the evaluation problem in operational activity, particularly in the properly prepared procedures to be followed, consisted of several stages adapted to currently conducted research. Properly executed evaluation of companies enables customers to take right decisions on contracting services and stimulate the development of those companies. It should be noted that the proposed algorithmic model of assessment may be particularly useful for assessment of complex logistics systems. Characteristics of the respective phases developed procedure allowed to indicate that it is important to select of appropriate criteria and evaluation methods. It was pointed out that particularly useful for assessing of logistics companies are multi-criteria analysis methods, because they allow to examine objects in a holistic manner, taking into consideration various aspects of activities such organizations. For the practical realization of assessment of logistics companies there was proposed Bellinger method, which contains quite transparent procedures. The results obtained from that method are consistent with those carried out by means of other, more complex multi-criteria methods. Also there was presented the problem of selection of weighted factors for the criteria in the context of their impact on the end result of evaluation. It was pointed out that the choice of an appropriate procedure for determining weights depends on the nature of the evaluated problem and form of criteria.

7

Bezpieczeństwo jako kryterium eksploatacji środków transportu

Bojar P., Migawa K.

Logistyka

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2014

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nr 3

638--643

PL

Identyfikacja wartości brzegowych i cech, które opisują bezpieczeństwa działania systemu jest kluczowym problemem dla oceny bezpieczeństwa działania systemu. W artykule, przedstawiono model oceny bezpieczeństwa dowolnego systemu transportowego. Przedstawiony model stanowi nowatorskie podejście do oceny systemów transportowych z punktu widzenia kryterium jego bezpieczeństwa. W modelu tym zakłada się cztery stany bezpieczności systemu. Pierwszy stan intencjonalny, który odzwierciedla sytuację bez wypadków i kolizji drogowych oraz poszkodowanych w tych wypadkach. Drugi stan to stan akceptowalny, w stanie tym występują kolizje drogowe, czyli na skutek zaistniałych zdarzeń nie ma ofiar są tylko straty materialne. Stan graniczny to stan w którym doszło do wypadku drogowego lecz na jego skutek wystąpiły tylko osoby ranne, ostatni z rozpatrywanych stanów to stan krytyczny w którym zaistniały wypadki drogowe i zginęła co najmniej jedna osoba. W pracy wyznaczono prawdopodobieństwa dla zbudowanego łańcucha Markowa.

EN

Identification of the limit values and characteristics that describe the security of the system is a key concern for the safety assessment of the system. The article presents a model safety evaluation of any transport system. The model is an innovative approach to the evaluation of transport systems from the point of view of its safety. In this model assumes four states system safety. The first intentional state, which reflects the situation without road accidents and collisions and victims in these cases. The second condition is a condition acceptable, in this state there are road collisions, or as a result of events occurring no people injured, only material losses. Limit state is a condition in which the accident occurred on the road but its effect occurred person injured, the last of the concerned states is a critical state in which accidents occurred and killed at least one person. In the study, the probability of the constructed Markov chain.

8

Wybrane modele wstępnej selekcji wykonawców robót budowlanych

Plebankiewicz E.

Przegląd Budowlany

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2008

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R. 79, nr 4

47-51

PL

W zamówieniach ogłaszanych przez inwestorów prywatnych, jak i w dużych międzynarodowych przetargach, często spotykana jest procedura prekwalifikacji, jako przedprzetargowej selekcji wykonawców. W artykule przedstawiona zostata charakterystyka wybranych modeli prekwalifikacji.

EN

In the case of orders advertised by private investors, as well as in large international tender procedures, a pre-qualification procedure is often applied to select potential contractors prior to tendering. This paper describes the characteristics of selected pre-qualification models.