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    Wyświetlanie 1-14 z 14
    Tytuł:
    Methods to Estimate the Channel Delay Profile and Doppler Spectrum of Shallow Underwater Acoustic Channels
    Autorzy:
    Nguyen, Van Duc
    Nguyen, Tien Hoa
    Ho, Hoa Xuan Thi
    Powiązania:
    https://bibliotekanauki.pl/articles/176670.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    shallow underwater acoustic
    channel parameters detection
    channel delay profile
    Doppler spectrum
    Opis:
    In this paper, we present the methods to detect the channel delay profile and the Doppler spectrum of shallow underwater acoustic channels (SUAC). In our channel sounding methods, a short impulse in form of a sinusoid function is successively sent out from the transmitter to estimated the channel impulse response (CIR). A bandpass filter is applied to eliminate the interference from out-of-band (OOB). A threshould is utilized to obtain the maximum time delay of the CIR. Multipath components of the SUAC are specified by correlating the received signals with the transmitted sounding pulse with its shifted phases from 0 to 2π. We show the measured channel parameters, which have been carried out in some lakes in Hanoi. The measured results illustrate that the channel is frequency selective for a Barrow band transmission. The Doppler spectrum can be obtained by taking the Fourier transform of the time correlation of the measured channel transfer function. We have shown that, the theoretical maximum Doppler frequency fits well to that one obtained from measurement results.
    Źródło:
    Archives of Acoustics; 2019, 44, 2; 375-383
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Use of Unmanned Aerial Vehicles for 3D topographic Mapping and Monitoring the Air Quality of Open-pit Mines
    Wykorzystanie bezzałogowych statków powietrznych (dronów) do monitorowania jakości powietrza w odkrywkowych kopalniach węgla kamiennego
    Autorzy:
    Bui, Xuan‑Nam
    Lee, Changwoo
    Nguyen, Quoc Long
    Adeel, Ahmad
    Cao, Xuan Cuong
    Nguyen, Viet Nghia
    Le, Van Canh
    Nguyen, Hoang
    Le, Qui Thao
    Duong, Thuy Huong
    Nguyen, Van Duc
    Powiązania:
    https://bibliotekanauki.pl/articles/317913.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Przeróbki Kopalin
    Tematy:
    drony
    jakość powietrza
    kopalnie odkrywkowe
    unmanned aerial vehicles
    air quality
    open pit mines
    Opis:
    Recently remarkable advancement development of unmanned aerial vehicles (UAVs) has been observed and their applications have been shown in many fields such as agriculture, industry, and environmental management. However, in the mining industry, the application of UAV technology remains potential. This paper presents a low-cost unmanned aerial vehicle technology-based system for 3D mapping and air quality monitoring at open-pit mine sites in Vietnam. The system includes several dust sensors that are mounted on a low-cost rotary-wing type UAV. The system collects a variety of data, mainly images and airborne pollutant concentrations. To evaluate the performance of the proposed system, field tests were carried out at the Coc Sau coal mine. Based on the images transmitted to the ground monitoring station, large scale 3D topographic maps were successfully modeled. In addition, sensors mounted on the UAV system were able to monitor the levels of environmental variables associated with the air quality within the pit such as temperature, dust, CO, CO2, and NOx. The field test results in this study illustrate the applicability of the low-cost UAV for the 3D mapping and the air quality monitoring at large and deep coal pits with relatively high accuracy.
    Źródło:
    Inżynieria Mineralna; 2019, 21, 2/2; 223-239
    1640-4920
    Pojawia się w:
    Inżynieria Mineralna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Delay factors in the construction of irrigation and hydropower projects in Vietnam
    Autorzy:
    Nguyen, Van Son
    Nguyen, Huu Hue
    Nguyen, Duc Anh
    Hai, Dinh Tuan
    Powiązania:
    https://bibliotekanauki.pl/articles/2203414.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    hydroenergetyka
    nawadnianie
    konstrukcja
    zarządzanie projektem
    współczynnik opóźnienia
    Wietnam
    hydropower
    irrigation
    construction
    project management
    delay factor
    Vietnam
    Opis:
    Irrigation and hydropower are among the most important sectors in the construction industry that propel the economic needs of a developing country like Vietnam. The construction of these projects often suffers from severe delays, leading to financial losses and other negative impacts on the economy. This paper aims to determine delay factors in the construction of these projects. Among many, 39 most important candidates of delay causes were identified from the literature review. Further surveys on project participants were conducted for the severity of these causes. An exploratory factor analysis was utilized to identify latent factors that cause delays in construction projects. The analysis result categorized a few groups of factors such as abnormal factors on the construction site (e.g., labor accidents, hydrology, water flow, extreme weather) and technical factors related to the construction contractor (e.g., unsuitable schedule, outdated construction technology, unprofessional workers) that have the greatest impact on the delay in construction of irrigation and hydropower projects in Vietnam. These findings contribute to the body of knowledge of project management and risk management, hence an improvement in the efficiency of the project sectors’ performance.
    Źródło:
    Archives of Civil Engineering; 2023, 69, 1; 5--20
    1230-2945
    Pojawia się w:
    Archives of Civil Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Robust H∞ fuzzy approach design via Takagi‐Sugeno descriptor model. application for 2‐DOF serial manipulator tracking control
    Autorzy:
    Thi, Van Anh Nguyen
    Pham, Duc Binh
    Nguyen, Danh Huy
    Nguyen, Tung Lam
    Powiązania:
    https://bibliotekanauki.pl/articles/27314207.pdf
    Data publikacji:
    2022
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
    Tematy:
    tracking control
    serial manipulator robot
    fuzzy control
    Takagi-Sugeno
    Lyapunov stability
    Opis:
    This paper focuses on trajectory tracking control for ro‐ bot manipulators. While much research has been done on this issue, many other aspects of this field have not been fully addressed. Here, we present a new solution using feedforward controller to eliminate parametric uncer‐ tainties and unknown disturbances. The Takagi‐Sugeno fuzzy descriptor system (TSFDS) is chosen to describe the dynamic characteristics of the robot. The combination of this fuzzy system and the robust H∞ performance makes the system almost isolated from external factors. The li‐ near matrix inequalities based on the theory of Lyapunov stability is considered for control design. The proposed method has proven its effectiveness through simulation results.
    Źródło:
    Journal of Automation Mobile Robotics and Intelligent Systems; 2022, 16, 3; 22--29
    1897-8649
    2080-2145
    Pojawia się w:
    Journal of Automation Mobile Robotics and Intelligent Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Multi-objective optimization of the cylindrical grinding process of SCM440 steel using preference selection index method
    Autorzy:
    Tien, Dung Hoang
    Trung, Do Duc
    Thien, Nguyen Van
    Nguyen, Nhu-Tung
    Powiązania:
    https://bibliotekanauki.pl/articles/1833757.pdf
    Data publikacji:
    2021
    Wydawca:
    Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
    Tematy:
    MRR
    Taguchi PSI method
    surface roughness
    cylindrical grinding process
    Opis:
    This paper presents a study to ensure the minimum values of Ra and Rz, and the maximum value of MRR when external cylindrical grinding by the PSI method. The experiments were performed according to the orthogonal Taguchi L9 matrix with the input parameters including workpiece speed, feed rate, and depth of cut in the conventional grinding machine. Analysis of experimental results by Pareto chart showed that the feed rate and the depth of cut most influence on Ra and Rz, respectively. Feed rate and depth of cut all have a great influence on MRR. Meanwhile, the workpiece speed has a negligible effect on all three output parameters. The research results showed that to obtain the minimum values of Ra and Rz, and maximum of MRR, the workpiece speed, feed rate, and depth of cut were 400 rev/min 37.7 mm/min, 0.09 mm/rev, and 0.02 mm, respectively.
    Źródło:
    Journal of Machine Engineering; 2021, 21, 3; 110--123
    1895-7595
    2391-8071
    Pojawia się w:
    Journal of Machine Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Applying Artificial Pillar to Replace the Coal Pillar Protecting Roadway to Increase Production Efficiency and Sustainable Development in the Vietnamese Coal Industry
    Autorzy:
    Dinh, Van Cuong
    Nguyen, Anh Tuan
    Tran, Van Thanh
    Nguyen, Thi Hoai Nga
    Duong, Duc Hai
    Powiązania:
    https://bibliotekanauki.pl/articles/2020898.pdf
    Data publikacji:
    2021
    Wydawca:
    Polskie Towarzystwo Przeróbki Kopalin
    Tematy:
    coal pillar protecting roadways
    coal loss
    artificial pillar
    underground mine
    filary węglowe
    górnictwo podziemne
    ubytki węgla
    Opis:
    Vietnam's domestic coal production is growing fast and is expected to reach 68.9 million tons in 2030, nearly 1.5 times higher than today. Open-pit mines will gradually reduce production and close, and underground mining coal output will increase progressively year by year and take a leading role. Besides the investment in new mines to achieve these goals, it is necessary to maximize the coal reserve exploited annually of existing underground mine projects, which its coal reserve in pillars protecting roadways currently accounts for 12−15%. The further exploitation of this coal reserve will decrease the costs of preparation of underground mines and granting mining rights and depreciation of infrastructure assets. Moreover, it will help reduce the loss of non-renewable resources and contributing to the sustainable development of Vietnam’s coal industry.
    Źródło:
    Inżynieria Mineralna; 2021, 2; 587--597
    1640-4920
    Pojawia się w:
    Inżynieria Mineralna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Impact of Digital Leadership on Organizational Performance: A Study in Vietnams coal Mining Companies
    Autorzy:
    Le, Van Chien
    Nguyen, Duc Thang
    Pham, Kien Trung
    Nguyen, Thi Hoai Nga
    Powiązania:
    https://bibliotekanauki.pl/articles/27323234.pdf
    Data publikacji:
    2023
    Wydawca:
    Polskie Towarzystwo Przeróbki Kopalin
    Tematy:
    digital transformation
    digital leadership
    digital transformation strategy
    digital skills
    organization performance
    coal mining company
    transformacja cyfrowa
    strategia
    górnictwo
    Opis:
    Under the influence of the 4th industrial revolution and the impact of the Covid-19 pandemic, digital transformation is rapidly taking place in all aspects of society. For businesses, digital transformation is an essential and objective trend for their sustainability and development. The purpose of digital transformation for businesses is to enhance operational efficiency through factors such as accelerating market speed, gaining competitive advantage, driving revenue growth, increasing labor productivity, and expanding customer attraction and retention. Numerous studies have indicated that the process of digital transformation in businesses is influenced by leadership and digital transformation strategies, and digital transformation has an impact on business performance. This study aims to identify the relationship between digital leadership and the operational efficiency of coal mining companies in Vietnam, with the mediating role of digital transformation strategies. Additionally, the study examines the moderating role of digital skills on the relationship between digital transformation strategies and the operational efficiency of the organizations. The research surveyed 111 employees and workers currently working in coal mining companies in Vietnam. Through analysis and hypothesis testing, the results showed that digital leadership does not have a direct impact on coal companies’ operational efficiency. However, it indirectly affects business performance through the mediating role of digital transformation strategies. The study's findings also revealed that the digital skills of employees play a moderating role in enhancing the relationship between digital transformation strategies and the operational efficiency of the organization.
    Źródło:
    Inżynieria Mineralna; 2023, 2; 121--130
    1640-4920
    Pojawia się w:
    Inżynieria Mineralna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessment of Heavy Metal Pollution in the Surface Water of the Doi-Cho Dem-Ben Luc Rivers, Vietnam
    Ocena zanieczyszczenia metalami ciężkimi wód powierzchniowych rzek Doi-Cho Dem-Ben Luc w Wietnamie
    Autorzy:
    Thieu, Van Vu Duc
    Dinh, Thi Thu Huong
    Nguyen, Thi Truc Thao
    Nguyen, Thuy Lan Chi
    Nguyen, Binh An
    Pham, Anh-Duc
    Powiązania:
    https://bibliotekanauki.pl/articles/2172069.pdf
    Data publikacji:
    2022
    Wydawca:
    Polskie Towarzystwo Przeróbki Kopalin
    Tematy:
    heavy metal pollution
    surface water
    distribution
    river
    Doi-Cho Dem-Ben Luc
    water quality protection
    zanieczyszczenie metalami ciężkimi
    wody powierzchniowe
    dystrybucja
    rzeki
    ochrona jakości wód
    Opis:
    Heavy metals are a pressing concern in terms of their pollution in aquatic ecosystems because of their persistence, environmental toxicity, bioaccumulation. Aquatic environments receive heavy metals in untreated or inadequately treated wastewater from domestic, industrial, agricultural, and navigation sources. The Doi-Cho Dem-Ben Luc Rivers play the key roles of irrigation, navigation and ecological restoration. It is crucial to ascertain the pollution status, influencing factors, ecological risks, and possible sources of heavy metals in the surface water of the Doi-Cho Dem-Ben Luc Rivers. In this study, surface water from 7 sampling sites over was collected from the Doi-Cho Dem-Ben Luc Rivers, over 7 consecutive periods from April 2019 to October 2021. Each surface sample was analyzed for 9 heavy metals including Fe, Mn, Cr, Zn, Cu, Pb, Cd, Ni, As. The sampling technique and sample treatment were done based on the Standard Methods for the Examination of Water and Wastewater. The time and space variation of heavy metal concentrations were examined to test the analysis of variance (ANOVA) and correlation among all the parameters using R statistical software. The results suggest a spatial homogeneity of heavy metals in the surface water the studied rivers. Among all nine examined heavy metals in the studied area, the concentrations of Fe (1.00 ÷ 5.06 mg/L) and Mn (0.14 ÷ 0.28 mg/L) are the highest, and the concentrations of Cr, Cd and As are the lowest that lower limit of detection. The results suggested that the mean concentrations of Fe and Mn were above the acceptable limits of the National technical regulation on surface water quality (QCVN 08-MT: 2015/BTNMT). While the concentrations of Fe, Mn, Zn, Cu, Pb, Ni do not meet the Water quality criteria for aquatic life (United State Environmental Protection Agency). Anthropogenic activities can be the main source of heavy metals in in the surface water of the Doi-Cho Dem-Ben Luc Rivers. Among the heavy metals, a significant positive correlation was observed between Fe, Mn, Zn and Ni (0.64 ÷ 0.87), whereas Cu exhibited a significant positive correlation with Ni (0.51). While Cu and Pb showed a not too strong correlation with Fe, Mn, Zn and Ni (0.25 ÷ 0.48). The distribution of heavy metals may also be influenced by properties of heavy metals and fluctuations in water flows. The results provide guidance for controlling heavry metal pollution and protectting water sources in the Doi-Cho Dem-Ben Luc Rivers.
    Metale ciężkie stanowią palący problem zanieczyszczenia w ekosystemach wodnych ze względu na ich trwałość, toksyczność dla środowiska i bioakumulację. Środowiska wodne sa zasilane w metale ciężkie z nieoczyszczonych lub nieodpowiednio oczyszczonych ścieków ze źródeł domowych, przemysłowych, rolniczych i żeglugowych. Rzeki Doi-Cho Dem-Ben Luc odgrywają kluczową rolę w nawadnianiu terenów, transporcie odnym i odbudowie ekologicznej. Kluczowe znaczenie ma ustalenie stanu zanieczyszczenia, czynników wpływających, zagrożeń ekologicznych i możliwych źródeł metali ciężkich w wodach powierzchniowych rzek Doi-Cho Dem-Ben Luc. W artykule przedstawiono wyniki badania wód powierzchniowych, próbki pobrano z 7 punktów pomiarowych z rzek Doi-Cho Dem-Ben Luc przez 7 kolejnych okresów od kwietnia 2019 r. do października 2021 r. Każda próbka została przeanalizowana pod kątem zawartości 9 metali ciężkich: Fe, Mn, Cr , Zn, Cu, Pb, Cd, Ni, As. Metodyka pobierania próbek i obróbki próbek zostały opracowane w oparciu o Standardowe Metody Badania Wód i Ścieków. Zbadano zmienność w czasie i przestrzeni stężeń metali ciężkich, do analizyy wyników wykorzystano analizę wariancji (ANOVA) i korelacji między wszystkimi parametrami przy użyciu oprogramowania statystycznego. Wyniki sugerują przestrzenną jednorodność zawartości metali ciężkich w wodach powierzchniowych badanych rzek. Spośród wszystkich dziewięciu badanych metali ciężkich w badanym terenie najwyższe są stężenia Fe (1,00 ÷ 5,06 mg/L) i Mn (0,14 ÷ 0,28 mg/L), a najniższe Cr, Cd i As (wartości odpowiadające dolnej granicy wykrywalności). Wyniki wskazują, że średnie stężenia Fe i Mn były powyżej dopuszczalnych limitów, opisanych w krajowych normach dotyczących jakości wód powierzchniowych (QCVN 08-MT: 2015/BTNMT). Natomiast stężenia Fe, Mn, Zn, Cu, Pb, Ni nie spełniają kryteriów jakości wody dla organizmów wodnych (Agencja Ochrony Środowiska Stanów Zjednoczonych). Działalność antropogeniczna może być głównym źródłem metali ciężkich w wodach powierzchniowych rzek Doi-Cho Dem-Ben Luc. Wśród metali ciężkich zaobserwowano istotną dodatnią korelację między zawartością Fe, Mn, Zn i Ni (0,64 ÷ 0,87), natomiast Cu wykazywała istotną dodatnią korelację z Ni (0,51). Zawartości Cu i Pb wykazywały niezbyt silną korelację z Fe, Mn, Zn i Ni (0,25 ÷ 0,48). Na rozmieszczenie metali ciężkich mogą mieć również wpływ właściwości metali ciężkich oraz wahania przepływów wody. Wyniki dostarczają wskazówek dotyczących kontrolowania zanieczyszczenia metalami ciężkimi i ochrony źródeł wody w rzekach Doi-Cho Dem-Ben Luc.
    Źródło:
    Inżynieria Mineralna; 2022, 2; 85--90
    1640-4920
    Pojawia się w:
    Inżynieria Mineralna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Radon-Radium Thermal Mineral Water in Vo Am Ecotourism Project Area, Ngoc Luong Commune, Yen Thuy District, Hoa Binh Province, Vietnam
    Autorzy:
    Ban, To Xuan
    Dung, Le Tien
    Duc, Tran Van
    Trong, Nguyen Huu
    Tuan, Truong Duc
    Powiązania:
    https://bibliotekanauki.pl/articles/27323255.pdf
    Data publikacji:
    2023
    Wydawca:
    Polskie Towarzystwo Przeróbki Kopalin
    Tematy:
    thermal mineral water
    Ngoc Luong
    Hoa Binh
    Vietnam
    wody termalne
    wody mineralne
    Wietnam
    Opis:
    Ngoc Luong thermal mineral water at Vo Am ecotoursim, Ngoc Luong commnune, Yen Thuy district, Hoa Binh province, northern Vietnam. The thermal mineral water source is at karstic-fractured limstones of Dong Giao Formation aged Anisi. Methods used in this study conists of basic field survey of hydrogeology, resistivity, borehole drilling, pumping tests, and thermal mineral water sample analysis. The thermal mineral water is classified as radon-radium, low mineralised thermal mineral water. The water source is originally related to the deep Moc Chau-Tam Diep Fault directing northwest-southeastward. Its exploration reserve is estimated at 1,497 m3/d with good quality, sastifying all national criterals for the use of domestic supply, bathing, and medical treatment. This is one of ten rare thermal-mineral water sources in Vietnam, containing radon and radium. It is thefore necessary to have good management to ensure the thermal-mineral water to be effectively exploited, used, and protected.
    Źródło:
    Inżynieria Mineralna; 2023, 2; 327--333
    1640-4920
    Pojawia się w:
    Inżynieria Mineralna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of solid and ionic surface reaction form to surface quality when using chemical-mechanical slurry polishing
    Autorzy:
    Duc, Le Anh
    Hieu, Pham Minh
    Mai, Nguyen Trong
    Trong, Thai Van
    Quang, Nguyen Minh
    Powiązania:
    https://bibliotekanauki.pl/articles/2171776.pdf
    Data publikacji:
    2022
    Wydawca:
    Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
    Tematy:
    chemical-mechanical slurry
    polishing
    abrasive particle
    ionic surface reaction
    yttrium aluminum garnet
    surface roughness
    Opis:
    The process of removing machining residues using chemical-mechanical slurry (CMS) has an important place in the creation of ultra-precise components in optical devices. Based on this feature, this work investigates the efficiency of the CMS polishing process by comparing the surface reaction modes by the ionic and solid reaction modes when polishing the yttrium aluminum garnet (YAG) and sapphire crystal. The study procedures were conducted to clarify the polishing performance corresponding to these two reaction types. The obtained experiments results show that the balance between the mechanical effect process using CMS polishing technology with chemical effect can be achieved with the ionic reaction mode. The results also show that the ionic surface reaction modes give more uniform material removal than the solid reaction on YAG and sapphire crystal surfaces. Therefore, the surface quality when polished by CMS technology with ionic surface reaction modes is better than that of solid surface reaction.
    Źródło:
    Journal of Machine Engineering; 2022, 22, 4; 82--94
    1895-7595
    2391-8071
    Pojawia się w:
    Journal of Machine Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Design optimization of compliant mechanisms for vibration assisted machining applications using a hybrid Six Sigma, RSM-FEM, and NSGA-II approach
    Autorzy:
    Pham, Huy-Tuan
    Nguyen, Van-Khien
    Dang, Quang-Khoa
    Duong, Thi Van Anh
    Nguyen, Duc-Thong
    Phan, Thanh-Vu
    Powiązania:
    https://bibliotekanauki.pl/articles/24084644.pdf
    Data publikacji:
    2023
    Wydawca:
    Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
    Tematy:
    compliant mechanism
    multi-objective optimisation
    Six Sigma
    NSGA-II
    Opis:
    Vibration-assisted machining, a hybrid processing method, has been gaining considerable interest recently due to its advantages, such as increasing material removal rate, enhancing surface quality, reducing cutting forces and tool wear, improving tool life, or minimizing burr formation. Special equipment must be designed to integrate the additional vibration energy into the traditional system to exploit those spectacular characteristics. This paper proposes the design of a new 2-DOF high-precision compliant positioning mechanism using an optimization process combining the response surface method, finite element method, and Six Sigma analysis into a multi-objective genetic algorithm. The TOPSIS method is also used to select the best solution from the Pareto solution set. The optimum design was fabricated to assess its performance in a vibration-assisted milling experiment concerning surface roughness criteria. The results demonstrate significant enhancement in both the manufacturing criteria of surface quality and the design approach criteria since it eliminates modelling errors associated with analytical approaches during the synthesis and analysis of compliant mechanisms.
    Źródło:
    Journal of Machine Engineering; 2023, 23, 2; 135--158
    1895-7595
    2391-8071
    Pojawia się w:
    Journal of Machine Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Enhancing Workplace Safety: A Comprehensive Action Plan for Duong Huy Coal Company (2021– 2025)
    Autorzy:
    Nguyen, Thi Hoai Nga
    Nguyen, Duc Thang
    Le, Dinh Chieu
    Le, Van Chien
    Pham, Kien Trung
    Powiązania:
    https://bibliotekanauki.pl/articles/27323288.pdf
    Data publikacji:
    2023
    Wydawca:
    Polskie Towarzystwo Przeróbki Kopalin
    Tematy:
    workplace safety
    safety standards
    safety solutions
    extractive industries
    Duong Huy coal company
    bezpieczeństwo i higiena pracy
    Wietnam
    przemysł
    Opis:
    Workplace safety is of paramount importance in industries such as coal mining, where accidents and occupational illnesses can result in significant human and economic costs. This study aims to develop an action plan to improve safety standards at Duong Huy Coal Company from 2021 to 2025. A comprehensive survey involving 93 safety managers and 379 workers from various production sites was researched to gather insights and opinions on safety priorities. Focus group discussions and expert consultations were employed to assess the current safety situation, identify challenges, and develop coherent safety solutions. Based on the survey results, the proposed action plan focuses on the following objectives: reducing workplace accidents by 20-25% annually, progressing towards zero accidents in the following years, and increasing productivity and benefits for both workers and the company. The plan also emphasizes the role of company leadership in widely communicating their commitment to safety and the need for individual units within the company to proactively plan, budget, and implement safety measures following their functions and responsibilities. Collaboration with relevant state agencies, mass mobilization campaigns, and the application of science and technology in safety and occupational health will further contribute to the enhancement of workplace safety at Duong Huy Coal Company.
    Źródło:
    Inżynieria Mineralna; 2023, 2; 205--208
    1640-4920
    Pojawia się w:
    Inżynieria Mineralna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An advanced IoT system for monitoring and analysing chosen power quality parameters in micro-grid solution
    Autorzy:
    Khoa, Ngo Minh
    Dai, Le Van
    Tung, Doan Duc
    Toan, Nguyen An
    Powiązania:
    https://bibliotekanauki.pl/articles/1841334.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    energy management
    internet of things (IoT)
    micro-grid
    power quality (PQ)
    ThingSpeak cloud
    Opis:
    This paper proposes an advanced Internet of Things (IoT) system for measuring, monitoring, and recording some power quality (PQ) parameters. The proposed systemis designed and developed for both hardware and software. For the hardware unit, three PZEM-004T modules with non-invasive current transformer (CT) sensors are used tomeasure the PQ parameters and an Arduino WeMos D1 R1 ESP8266 microcontroller isused to receive data from the sensors and send this data to the server via the internet. For the software unit, an algorithm using Matlab software is developed to send measurement datato the ThingSpeak cloud. The proposed system can monitor and analyse the PQ parameters including frequency, root mean square (RMS) voltage, RMS current, active power, and the power factor of a low-voltage load in real-time. These PQ parameters can be stored on theThingSpeak cloud during the monitoring period; hence the standard deviation in statistics of the voltage and frequency is applied to analyse and evaluate PQ at the monitoring point.The experimental tests are carried out on low-voltage networks 380/220 V. The obtained results show that the proposed system can be usefully applied for monitoring and analysing chosen PQ parameters in micro-grid solutions.
    Źródło:
    Archives of Electrical Engineering; 2021, 70, 1; 173-188
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Industry 4.0, lean management and organizational support : a case of supply chain operations
    Przemysł 4.0, lean management i wsparcie organizacyjne : przypadek operacji łańcucha dostaw
    Autorzy:
    Tiep, Nguyen Cong
    Oanh, Thai Thi Kim
    Thuan, Tran Duc
    Tien, Dinh Van
    Ha, Thai Van
    Powiązania:
    https://bibliotekanauki.pl/articles/1826128.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Częstochowska
    Tematy:
    supply chain operations reference model
    Industry 4.0
    lean management
    organizational support
    model odniesienia operacji łańcucha dostaw
    Przemysł 4.0
    szczupłe zarządzanie
    wsparcie organizacyjne
    Opis:
    Currently, Industry 4.0 is considered as the essential improvement of business processes that could improve the lean management along with high organizational support and effective supply chain practices. Thus, the aim linked with the current article is to examine the role of Industry 4.0 in the business processes and its impact on lean management. The purpose also includes the investigation of mediation impact of supply chain operations reference model (SCORM) among the nexus of the role of Industry 4.0 in business process and lean management along with the examination of moderating role of organizational support among the nexus of SCORM and lean management. The researchers and questionnaires have selected the quantitative method of data collection have been used to gather the data from the respondents, while smart-PLS has been executed for analysis purpose. The results revealed that positive association had been found among the nexus of the role of Industry 4.0 in the business processes and lean management. The results also exposed that SCORM is positively mediating among the nexus of the role of Industry 4.0 in the business processes and lean management while organizational support positive moderated among the nexus of SCORM and lean management. These findings provided the guidelines to the policymakers that they should enhance their focus on the implementation of Industry 4.0 in the organization that could lead the organization towards success.
    Obecnie Przemysł 4.0 uważany jest za zasadnicze usprawnienie procesów biznesowych, które mogłoby usprawnić szczupłe zarządzanie przy jednoczesnym wysokim wsparciu organizacyjnym i efektywnych praktykach łańcucha dostaw. Zatem celem związanym z niniejszym artykułem jest zbadanie roli Przemysłu 4.0 w procesach biznesowych i jego wpływu na lean management. Celem jest również zbadanie wpływu mediacyjnego modelu referencyjnego operacji łańcucha dostaw (SCORM) na splot roli Przemysłu 4.0 w procesach biznesowych i szczupłym zarządzaniu, wraz z badaniem moderującej roli wsparcia organizacyjnego w powiązaniu SCORM i lean zarządzanie. Badacze i kwestionariusze wybrali ilościową metodę zbierania danych, która została wykorzystana do zebrania danych od respondentów, natomiast smart-PLS został wykonany do analizy. Wyniki ujawniły, że pozytywny związek został znaleziony wśród splotu roli Przemysłu 4.0 w procesach biznesowych i szczupłym zarządzaniu. Wyniki pokazały również, że SCORM pozytywnie pośredniczy w powiązaniu roli Przemysłu 4.0 w procesach biznesowych i szczupłym zarządzaniu, podczas gdy wsparcie organizacyjne jest moderowane pozytywnie wśród powiązań SCORM i lean management. Ustalenia te dostarczyły wskazówek dla decydentów, że powinni oni skupić się na wdrażaniu Przemysłu 4.0 w organizacji, która może poprowadzić organizację do sukcesu.
    Źródło:
    Polish Journal of Management Studies; 2020, 22, 1; 583-594
    2081-7452
    Pojawia się w:
    Polish Journal of Management Studies
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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