scholarly journals ВЫБОР И ОБОСНОВАНИЕ АРХИТЕКТУРЫ ВИРТУАЛЬНОЙ ПРОИЗВОДСТВЕННОЙ СИСТЕМЫ ДЛЯ ПЛАНИРУЕМОГО ПОРТФЕЛЯ ЗАКАЗОВ

2018 ◽  
pp. 70-74
Author(s):  
Ксения Олеговна Западня ◽  
Олег Александрович Гайденко ◽  
Вадим Алексеевич Пуйденко
Keyword(s):  
Objective Function ◽  
Production System ◽  
Virtual Production ◽  
Initial Stage ◽  
Acceptable Risks ◽  
Agent Simulation ◽  
Key Indicators ◽  
Architecture Development ◽  
The Impact ◽  
Adaptation Costs

The task to form and research the virtual production system (VPS) operation for the planned portfolio of orders (PPO) has been stated and solved. Due to the complexity of the proposed task, the solution is implemented in several stages. At the first stage the research of the main indicators of the formed VPS has been made. First of all, this concerns the composition of the VPS that according to its characteristics should meet the basic requirements of the PPO. For this purpose a set of potential enterprises – VPS candidates – have been formed using a precedent base (PB). A qualitative scale in the form of Latin alphabet was used to evaluate each enterprise in terms of key indicators and requirements of PPO. By lexicographic ordering of options in the PB, the most suitable enterprises are selected to make the VPS. To adapt the enterprises (equipment, technologies) to the specific requirements of PPO, the choice of activities for the modernization of production is made. The adaptation costs have been selected as an objective function to evaluate the set of activities. The time to make the activities and the acceptable risks are taken as limitations for the task. In order to study the VPS operation an agent simulation model has been constructed. The analysis of the VPS "supply-production-marketing" logistics chain has been carried out on the basis of this model. The results of the simulation make it possible to estimate the time of PPO implementation, the impact of the risks and, if necessary, to make the further restructuring of the VPS architecture. The proposed approach is expedient to be used at the initial stage of VPS architecture development taking into account the basic requirements associated with the planned portfolio of orders

scholarly journals Efficient Operative Cost Reduction in Distribution Grids Considering the Optimal Placement and Sizing of D-STATCOMs Using a Discrete-Continuous VSA

2021 ◽  
Vol 11 (5) ◽  
pp. 2175
Author(s):  
Oscar Danilo Montoya ◽  
Walter Gil-González ◽  
Jesus C. Hernández
Keyword(s):  
Objective Function ◽  
Reactive Power ◽  
Programming Model ◽  
Search Algorithm ◽  
Solution Space ◽  
Distribution Networks ◽  
Optimal Placement ◽  
Mixed Integer ◽  
Solution Vector ◽  
The Impact

The problem of reactive power compensation in electric distribution networks is addressed in this research paper from the point of view of the combinatorial optimization using a new discrete-continuous version of the vortex search algorithm (DCVSA). To explore and exploit the solution space, a discrete-continuous codification of the solution vector is proposed, where the discrete part determines the nodes where the distribution static compensator (D-STATCOM) will be installed, and the continuous part of the codification determines the optimal sizes of the D-STATCOMs. The main advantage of such codification is that the mixed-integer nonlinear programming model (MINLP) that represents the problem of optimal placement and sizing of the D-STATCOMs in distribution networks only requires a classical power flow method to evaluate the objective function, which implies that it can be implemented in any programming language. The objective function is the total costs of the grid power losses and the annualized investment costs in D-STATCOMs. In addition, to include the impact of the daily load variations, the active and reactive power demand curves are included in the optimization model. Numerical results in two radial test feeders with 33 and 69 buses demonstrate that the proposed DCVSA can solve the MINLP model with best results when compared with the MINLP solvers available in the GAMS software. All the simulations are implemented in MATLAB software using its programming environment.

scholarly journals Monitoring of the Impact of Lithium Nitrate on the Alkali–aggregate Reaction Using Acoustic Emission Methods

Materials ◽  
2018 ◽  
Vol 12 (1) ◽  
pp. 20
Author(s):  
Justyna Zapała-Sławeta ◽  
Grzegorz Świt
Keyword(s):  
Acoustic Emission ◽  
Initial Reaction ◽  
Lithium Nitrate ◽  
Acoustic Emission Method ◽  
Emission Method ◽  
Acoustic Activity ◽  
Initial Stage ◽  
Chemical Admixture ◽  
Different Characteristics ◽  
The Impact

The study analyzed the possibility of using the acoustic emission method to analyse the reaction of alkali with aggregate in the presence of lithium nitrate. Lithium nitrate is a chemical admixture used to reduce adverse effects of corrosion. The tests were carried out using mortars with reactive opal aggregate, stored under the conditions defined by ASTM C227. The acoustic activity of mortars with a corrosion inhibitor was referred to linear changes and microstructure of specimens in the initial reaction stages. The study found a low acoustic activity of mortars with lithium nitrate. Analysis of characteristic parameters of acoustic emission signals, combined with the observation of changes in the microstructure, made it possible to describe the corrosion processes. As the reaction progressed, signals with different characteristics were recorded, indicating aggregate cracking at the initial stage of the reaction, followed by cracking of the cement paste. The results, which were referred to the acoustic activity of reference mortars, confirmed that the reaction of opal aggregate with alkali was mitigated in mortars with lithium nitrate, and the applied acoustic emission method enabled the detection and monitoring of ASR progress.

Nutzung von Flexibilitätspotenzialen im Störungsmanagement*/Potentials of flexibility in the disruption management of large-scale product assembly

2016 ◽  
Vol 106 (09) ◽  
pp. 631-636
Author(s):  
H. Prinzhorn ◽  
M. Zenker ◽  
R. Sporrer ◽  
P. Prof. Nyhuis
Keyword(s):  
Production System ◽  
Large Scale ◽  
Disruption Management ◽  
Short Term ◽  
The Impact ◽  
Product Assembly ◽  
Term Response

Die hohe Störfanfälligkeit bei der Montage großskaliger Produkte verlangt eine kurzfristige Auswahl von Maßnahmen zur Reaktion auf Störungen, um Auswirkungen wie Lieferterminverspätungen oder Auslastungsverluste zu reduzieren. Die Nutzung von Flexibilitätspotenzialen eines Produktionssystems stellt einen Ansatz dar, um diese Herausforderung zu bewältigen. Dieser Fachbeitrag zeigt auf, welche Flexibilitätspotenziale in diesem speziellen Umfeld zur Verfügung stehen und genutzt werden können.   Assembling large-scale products involves frequent process interruptions why in order to reduce the impact of interruptions, a short-term response is necessary to reduce delivery delays and idle times of resources. An approach for challenge this represents the flexibility of a production system. Regarding the environment of large-scale product assembly, it has to be shown which potentials of flexibility are able to use in a short-term manner.

scholarly journals Audio Mining: The Role of Vocal Tone in Persuasion

2021 ◽  
Author(s):  
Xin (Shane) Wang ◽  
Shijie Lu ◽  
X I Li ◽  
Mansur Khamitov ◽  
Neil Bendle
Keyword(s):  
Empirical Study ◽  
Large Scale ◽  
Controlled Experiments ◽  
The Core ◽  
Content Model ◽  
Stereotype Content ◽  
Key Indicators ◽  
The Impact ◽  
Insight Into

Abstract Persuasion success is often related to hard-to-measure characteristics, such as the way the persuader speaks. To examine how vocal tones impact persuasion in an online appeal, this research measures persuaders’ vocal tones in Kickstarter video pitches using novel audio mining technology. Connecting vocal tone dimensions with real-world funding outcomes offers insight into the impact of vocal tones on receivers’ actions. The core hypothesis of this paper is that a successful persuasion attempt is associated with vocal tones denoting (1) focus, (2) low stress, and (3) stable emotions. These three vocal tone dimensions—which are in line with the stereotype content model—matter because they allow receivers to make inferences about a persuader’s competence. The hypotheses are tested with a large-scale empirical study using Kickstarter data, which is then replicated in a different category. In addition, two controlled experiments provide evidence that perceptions of competence mediate the impact of the three vocal tones on persuasion attempt success. The results identify key indicators of persuasion attempt success and suggest a greater role for audio mining in academic consumer research.

scholarly journals Strategies to Minimize the Impact of Antibiotic Resistance in Livestock Production System

2019 ◽  
Vol 8 (03) ◽  
pp. 2293-2310
Author(s):  
Ankaj Thakur ◽  
Atul Kumar ◽  
Manoj Sharma ◽  
Rohit Kumar ◽  
Brij Vanita
Keyword(s):  
Antibiotic Resistance ◽  
Production System ◽  
Livestock Production ◽  
The Impact

scholarly journals Atypical start-up experiments on pump as turbine

2021 ◽  
Vol 13 (11) ◽  
pp. 168781402110627
Author(s):  
Yu-Liang Zhang ◽  
Yan-Juan Zhao
Keyword(s):  
Static Pressure ◽  
Power Coefficient ◽  
Transient Performance ◽  
Test Rig ◽  
Transient Characteristics ◽  
Maximum Value ◽  
Start Up ◽  
Initial Stage ◽  
Evolution Characteristics ◽  
The Impact

At present, research on the characteristics of pumps as turbine (PATs) during the start-up process is still insufficient. To reveal the transient characteristics of a centrifugal PAT during the atypical start-up process, a test rig for the transient performance of the PAT was built; in addition, experiments on the transient hydraulic performance of three kinds of steady speed and three kinds of steady flow were conducted. Through these experiments, the evolution characteristics of the transient performance parameters of the PAT during the atypical start-up process were analyzed over time. Moreover, three dimensionless coefficients were employed to deeply reveal the transient characteristics of the PAT during atypical start-up. Results showed that the rise curves of flow rate and outlet static pressure exhibited shock phenomena. With the increase in the stable running speed after start-up, the impact phenomenon of the outlet static pressure presented a delayed trend. The dimensionless head and flow coefficients reached the maximum value at the initial stage of the atypical start-up process and then rapidly dropped to the minimum value before slowly rising to the final stable value. The dimensionless power coefficient had a maximum value at the initial stage of atypical start-up and then rapidly dropped to the final stable value.

scholarly journals Safety and reliability of the personal bus carriages in integrated municipal system of traffic and public transport management - analysis of literature

2018 ◽  
Vol 19 (12) ◽  
pp. 246-251
Author(s):  
Paweł Woś ◽  
Jacek Michalski
Keyword(s):  
Public Transport ◽  
Road Safety ◽  
Road Transport ◽  
The European Union ◽  
Road Accidents ◽  
Safety And Reliability ◽  
Key Indicators ◽  
The Impact ◽  
The City ◽  
The Eu

The article analyzes the city's logistics development strategies and its public transport, especially bus traffic. Statistical analysis of all road transport in the European Union (EU) has been carried out. The most important reasons for the tragic road accidents in Poland have been mixed up. Key elements of active safety and passive safety of buses and road safety were analyzed. Characterized key indicators of road safety in the EU and the probability of bus incidents. The impact on the ecology of the city of road transport was analyzed in terms of the significance of exhaust emissions of various bus designs and emissions of other pollutants.

scholarly journals Impact Size and Determinants of Indirect Cost of Financial Distress: Role of Receivable and Inventory Management

2020 ◽  
Vol 16 (2) ◽  
pp. 179-207
Author(s):  
Umar Farooq ◽  
Muhammad Ali Jibran Qamar ◽  
Krishna Reddy
Keyword(s):  
Indirect Cost ◽  
Inventory Management ◽  
Financial Distress ◽  
Multi Stage ◽  
Initial Stage ◽  
Non Linear ◽  
Management Policies ◽  
Internal Operations ◽  
The Impact

This research investigates the opportunity cost as an indirect cost of financial distress from two perspectives. First, indirect cost is estimated using multi-stage financial distress and non-linear proxy of debt. Second, receivable and inventory management are studied as determinants of indirect cost. The sample includes ongoing Pakistani firms that were healthy in the previous year and documenting positive gross profit. Results showed that firms bear opportunity loss primarily due to leverage rather than multistage financial distress. However, a non-linear relationship is found between leverage and indirect cost. Results further explored the impact of multistage financial distress on internal operations, i.e., working capital policies. It is found that firms manage receivable and inventory simultaneously during the multistage financial distress. Results revealed that increasing receivables and decreasing inventory is suitable during the transition of healthy firms to initial stage of financial distress, i.e., profit reduction. However, decreasing receivables, along with holding more inventory, is recommended for healthy firms that face liquidity problems subsequently. It is concluded that managers can reduce the indirect cost after deploying the optimal debt ratio and recommended receivable and inventory management policies.

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