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Статті в журналах з теми "Two-Step Dynamic-Priority"
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Saddam, Siti Zaitun, Nurhuda Nizar, Nurul Azrin Ariffin, and Norazira Mohd Abas. "The Effects of Dynamic Capabilities on Firm’s Financial Performance." Information Management and Business Review 15, no. 1(I)SI (May 11, 2023): 37–45. http://dx.doi.org/10.22610/imbr.v15i1(i)si.3388.
Повний текст джерелаАнотація:
Firms often face significant challenges to stay competitive in the present economic environment, thus, dynamic capabilities are vital as it is a substantial factor in accomplishing better business performance. This study involved yearly data of 62 firms in the ACE market that engaged with dynamic capabilities, the data was collected from the year 2012-2021. The data was gathered from the firm's annual report and has been analyzed using two-step GMM. Generally, the ACE market is consistently associated with inferior performance and capital compared to the main market. Hence, the market has the possibility of being delisted and affecting capital market performance. Therefore, this study includes dynamic capabilities in the ACE market to study the market’s performance. The results obtained are consistent with the theory, whereby changes in dynamic capabilities contributed to a positive return on the firm’s performance. However, the small capital nature of the ACE Market limits the investment in the dynamic capabilities. This study concluded that more priority to be given to the awareness of dynamic capabilities in the current competitive era. The result proved that the investment in the dynamic capabilities improved the performance of the Ace market even though some of the firms in the ACE market ignored dynamic capabilities due to capital constraints. Thus, policymakers should play their role in providing grants for the firms in the ACE Market to improve the investment in dynamic capabilities.
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Tian, Ye, Lin Ma, and Xue Zhi Tan. "Collusion-Resistant Spectrum Allocation Based on Pricing Game and Multi-Stage Auction." Applied Mechanics and Materials 198-199 (September 2012): 1588–93. http://dx.doi.org/10.4028/www.scientific.net/amm.198-199.1588.
Повний текст джерелаАнотація:
With the urgent needs of improving spectrum’s efficiency, dynamic spectrum allocation based on auction has become a popular method, which makes unlicensed users to use the vacant spectrum released by primary users. However, the collusion behavior between unlicensed users harms system’s efficiency and profit. Although many kinds of mechanism have been proposed to solve this problem, resisting collusion is still a tough problem. In this paper, we study the nature of collusion behavior and revenue, and model a multi-stage auction for centralized spectrum allocation. In order to balance the collusion-resistance and revenue-optimization, we propose an algorithm with unit price priority and one step revenue optimization, which can combat collusion between unlicensed users and encourage them to compete with each other so that improve system’s total profit to some degree. With the simulation results, our algorithm shows a good performance on collusion-resistance and system’s revenue comparing with the other two algorithms.
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Wu, Songhua, Weibiao Chen, Junwu Tang, Chaofang Zhao, and Ge Chen. "Lidar Concept of “Guanlan” Mission for Space Oceanography." EPJ Web of Conferences 237 (2020): 01012. http://dx.doi.org/10.1051/epjconf/202023701012.
Повний текст джерелаАнотація:
Among the various challenges in spaceborne radar observation of the ocean, the following two issues are probably of a higher priority: inadequate dynamic resolution, and ineffective vertical penetration. Two highly anticipated breakthroughs in the coming decade are likely to be associated with radar interferometry and ocean lidar technology, which are expected to make a substantial contribution to a sub-mesoscale-resolving and depth-resolving observation of the ocean. The planned “Guanlan” science mission comprises a dual-frequency (Ku and Ka) interferometric altimetry (IA) and a near-nadir pointing ocean lidar (OL). The spaceborne active OL will ensure a deeper penetration depth and an all-time detection which leads to a layered characterization of the optical properties of the subsurface ocean. The simultaneous functioning of the OL and a dual-frequency (Ku and Ka) interferometric altimetry system will allow an enhanced understanding of contributions of the atmosphere and the air-sea interface which in turn considerably reduce the error budgets of the two sensors. The OL payload is expected to partially reveal the marine food chain and ecosystem with 10-m vertical interval in the euphotic layer, moving a significant step down to the oceanic mixed layer both dynamically and bio-optically.
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Rossouw, Stephanie, Talita Greyling, and Tamanna Adhikari. "The evolution of happiness pre and peri-COVID-19: A Markov Switching Dynamic Regression Model." PLOS ONE 16, no. 12 (December 10, 2021): e0259579. http://dx.doi.org/10.1371/journal.pone.0259579.
Повний текст джерелаАнотація:
Happiness levels often fluctuate from one day to the next, and an exogenous shock such as a pandemic can likely disrupt pre-existing happiness dynamics. This paper fits a Marko Switching Dynamic Regression Model (MSDR) to better understand the dynamic patterns of happiness levels before and during a pandemic. The estimated parameters from the MSDR model include each state’s mean and duration, volatility and transition probabilities. Once these parameters have been estimated, we use the one-step method to predict the unobserved states’ evolution over time. This gives us unique insights into the evolution of happiness. Furthermore, as maximising happiness is a policy priority, we determine the factors that can contribute to the probability of increasing happiness levels. We empirically test these models using New Zealand’s daily happiness data for May 2019 –November 2020. The results show that New Zealand seems to have two regimes, an unhappy and happy regime. In 2019 the happy regime dominated; thus, the probability of being unhappy in the next time period (day) occurred less frequently, whereas the opposite is true for 2020. The higher frequency of time periods with a probability of being unhappy in 2020 mostly correspond to pandemic events. Lastly, we find the factors positively and significantly related to the probability of being happy after lockdown to be jobseeker support payments and international travel. On the other hand, lack of mobility is significantly and negatively related to the probability of being happy.
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Baranov, Alexander A., Leyla S. Namazova-Baranova, Irina A. Belyaeva, Tatiana V. Turti, Alexey A. Vishneva, and Alexey I. Molodchenkov. "New Paradigm in Abilitation of Premature Children with Perinatal Pathology — Therapeutic Stages Personalization: Cohort Study." Current Pediatrics 19, no. 4 (September 19, 2020): 256–67. http://dx.doi.org/10.15690/vsp.v19i4.2111.
Повний текст джерелаАнотація:
Background. The abilitation of premature infants acquires importance due to the increased prevalence of delayed health disorders in these children. The article considers the issues of individualization of rehabilitation treatment for premature infants according to prediction of perinatal pathology outcomes, determining the individual levels of «abilitation windows» and developing personalized abilitation programs.Objective. The aim of the study was to determine individual timely sensitive ontogenesis stages («abilitation windows») for premature children with various perinatal pathology, as well as the most effective methods of rehabilitation treatment according to the maturity of the child and the type of neurosomatic deficiency.Methods. Two-stage cohort study of premature children with gestational age of 250–6–300–6 weeks was conducted. Stage 1 — retrospective analysis of «abilitation windows» in 115 premature children, development of prognostic scenarios. Stage 2 — prospective cohort study of 109 premature children, using abilitation methods in this cohort according to predicted events and estimation of abilitation efficacy. Medical interventions: familyoriented educational counseling, kinesiotherapy, physiotherapy, neuroprotectors, music therapy.Results. Information matrixes on filling ontogenetic abilitation periods have been developed, as well as age limits for «abilitation windows» have been defined on the 1st stage. Sensitive interval has been established for the use of stimulating effects in extremely immature children (postconceptional age of 34–37 weeks). The leading role of abilitation protective measures has been identified. Perinatal pathology outcomes have been analyzed in children from retrospective analysis group. Direct abilitation of premature children (from birth to 18 months) was carried out on the 2nd stage of the study according to probability forecasts. The priority of non-drug abilitation methods usage in immature children was confirmed. The need in step-by-step dynamic correction of abilitation programs was established.Conclusion. Prognostic significance of perinatal period events and individual postconceptional age in «abilitation windows» development for premature children was determined. The priority of non-drug abilitation for such patients (including family-oriented pedagogics) is established.
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Sadiq, Muhammad, Carlos Alfaro Aragon, Yacine Terriche, Syed Wajahat Ali, Chun-Lien Su, Ľuboš Buzna, Mahmoud Elsisi, and Chung-Hong Lee. "Continuous-Control-Set Model Predictive Control for Three-Level DC–DC Converter with Unbalanced Loads in Bipolar Electric Vehicle Charging Stations." Mathematics 10, no. 19 (September 22, 2022): 3444. http://dx.doi.org/10.3390/math10193444.
Повний текст джерелаАнотація:
Zero-emission transportation is currently a public priority, especially in big cities. For this reason, the use of electric vehicles (EVs) is receiving much attention. To facilitate the adoption of EVs, a proper charging infrastructure together with energy management is essential. This article proposes a design guideline for a direct current (DC) charging station with bipolar properties. A bipolar system can convert a two-wire system into three wires in a microgrid system with a neutral line. The configuration of the bipolar system supports different loads; therefore, the unbalanced operation is inherent to the system. The proposed bipolar DC charging station (CS) has a three-level balancing converter that reduces the step-down effort chargers. Moreover, this paper proposes the continuous-control-set model predictive control (CCS-MPC)-based balancing strategy that allows the handling of different output loads while keeping the neutral-line voltage efficiently regulated with improved dynamic performance compared to a traditional controller. Stability and parameter robustness analyses are also performed for the control parameter selection. To ensure the performance of the proposed method, both simulation and experimental results are presented and compared with those obtained from the traditional methods.
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Hashemkhani Zolfani, Sarfaraz, Reza Dehnavieh, Atousa Poursheikhali, Olegas Prentkovskis, and Payam Khazaelpour. "Foresight Based on MADM-Based Scenarios’ Approach: A Case about Comprehensive Sustainable Health Financing Models." Symmetry 12, no. 1 (December 27, 2019): 61. http://dx.doi.org/10.3390/sym12010061.
Повний текст джерелаАнотація:
As indicated by a worldwide common perspective about health and sustainable health systems, the health structure as a part of public health is a key theme of many societies. The future is shaped by probable future scenarios, for which dealing practically has many complications. This study is focused on the future scenarios for a comprehensive sustainable health financing model to support a superior structure for a decision and policy-making pilot for the society. This aim is followed based on multiple attribute decision making (MADM)-based scenarios using two MADM methods, step-wise weight assessment ratio analysis (SWARA) and weighted aggregated sum product assessment (WASPAS), as a hybrid model which is the first real case study of the approach. Four main probable future scenarios are identified and selected based on experts’ viewpoints about sustainable health financing models. These scenarios include membership in the World Trade Organization (WTO), dynamic basic insurance, international cooperation, and effective resources management. The process of evaluating based on the approach works as a wider picture, including all criteria and alternatives together. Sustainable medical services, empowering the private sector in both production and technology, and employing international managers took place as the top priority for considering the most applicable alternatives in the future. This structure is designed and developed in Iran’s context, and the Institute for Futures Studies in Health is the pilot of the research.
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Lian, Zhan, Kun Liu, and Tong Yang. "Potential Influence of Offshore Wind Farms on the Marine Stratification in the Waters Adjacent to China." Journal of Marine Science and Engineering 10, no. 12 (December 3, 2022): 1872. http://dx.doi.org/10.3390/jmse10121872.
Повний текст джерелаАнотація:
Offshore wind farms (OWFs) can influence marine stratifications, leading to fuel nutrition in the upper ocean and regulating ocean carbon fluxes. Evaluating this dynamic effect facilitates the planning of OWFs deployment for enlarging marine carbon sequestration, which is urgent in the pursuit of China’s carbon neutrality targets. However, it is impossible to observe the target influence in the planning stage of deployments, and it is impractical to build a high-resolution (100~101 m) model to cover the entire waters adjacent to China. The theoretical calculations, therefore, are the first step and top priority. The simplified theory presents two suggestions in the design of future OWF deployments in the study area. The first suggestion is made from the perspective of OWF positioning. To the east of the cities of Zhoushan, Putian, and Shantou, the oceans are dynamically sensitive to OWF deployments. The second suggestion is made from the perspective of the length scale of OWFs. A broader OWF results in a smaller vertical disturbance in the coastal waters, but the situation is opposite in the open seas. The OWF deployment strategy, proposed in the aim of ensuring idealized marine stratification responses, thus varies geographically. This study provides a panoramic view of the sensitivity of marine stratification to OWFs in the study regions. It can be seen as a steppingstone in detailed research of the target phenomenon.
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Isachenko, Tatiana E., and Polina S. Volova. "SPATIAL ASSESSMENT METHODS IN CREATION OF THE TOURISM AND RECREATION DEVELOPMENT CONCEPT (A CASE STUDY OF THE USTYANSKY DISTRICT, ARKHANGELSK REGION)." Географический вестник = Geographical bulletin, no. 4(63) (2022): 149–66. http://dx.doi.org/10.17072/2079-7877-2022-4-149-166.
Повний текст джерелаАнотація:
Tourism and recreation play an increasingly important role in the economy of regions located in the European territory of Russia. Their importance in the arrangement of space is also constantly increasing. It is essential to include tourism and recreation in the territorial development programs, which, in turn, requires elaboration of concepts for their promotion at inter-regional, regional, and intra-regional levels. The concept of tourism and recreation development is based on a comprehensive assessment of the territory, taking into account its stable characteristics and dynamic indicators. The areal nature of recreational impacts determines the choice of spatial assessment methods. Structurally, the concept of tourism and recreation development contains three blocks: informational, analytical, and practical. The article discusses the concept formation methodology based on two geographical methods: tourist-recreational zoning and construction of a tourist-recreational frame of the region. The practical part of the study is based on the territory of the Ustyansky district of the Arkhangelsk region. The application of the developed methodology to a specific region made it possible to step by step follow the algorithm for using spatial assessment when working with two blocks of the concept: the informational block, which includes a description of the tourist and recreational potential and the current state of the tourism industry, and the analytical block, which defines priority areas for the development of tourism and recreation. The article also shows the formation of the practical block of the concept based on the data collected. It contains ideas concerning promotion of the region’s tourism potential and the main tools for implementing the concept. Spatial assessment makes it possible not only to outline the directions of tourism development in the region but also to give recommendations for organizing high-quality recreation for local residents. The materials of the article can be used to formulate methodological recommendations on the preparation of tourism and recreation development concepts at various regional levels.
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Tsatsulin, A. N., and B. A. Tsatsulin. "Scenario Modeling in Health System Management Perm Region (Part 2)." Administrative Consulting, no. 3 (May 23, 2021): 98–109. http://dx.doi.org/10.22394/1726-1139-2021-3-98-109.
Повний текст джерелаАнотація:
In continuation of the article, the authors of the study devoted to the problems of scenario modeling and solving specific problems of management and development of the health care system of the Perm Territory, built the author’s dynamic multivariate model, which was based on an authoritative approach and consists of a set of five structural simultaneous equations. As a result, each equation of the system is a linear form of recursive regression, where the independent variable as a factor-factor taken into account in one equation becomes a depend- ent variable as an effective factor-factor. In order to eliminate the phenomenon of autocor- relation of residual values, the method of time lagging was used. To estimate the parameters of the reduced form of structural simultaneous equations, the two-step least squares method was used as a special case of the maximum likelihood method. The obtained parameter esti- mates on the whole turned out to be effective with moderate consistency and satisfactory bias. The constructed model made it possible to carry out a short-term forecast of the most important target socio-economic indicator of the success of healthcare development in the region until 2023. The authors considered the national goal as such a priority indicator — the expected (future) life expectancy of the population of the study area. At the end of the article, conclusions were drawn and the prospects for further scientific research of the authors were outlined.
Тези доповідей конференцій з теми "Two-Step Dynamic-Priority"
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Imanbayev, Bakyt, Ruslan Kushekov, Marat Sagyndikov, and Damir Shyrakbayev. "Feasibility Study of a Polymer Flood for the Uzen Brownfield Conditions." In SPE Annual Caspian Technical Conference. SPE, 2022. http://dx.doi.org/10.2118/212091-ms.
Повний текст джерелаАнотація:
Abstract The Uzen field development stage is characterized by high watercut (~90%) due to long-term waterflooding and a recovery factor of 34,6%, which is appropriate for moving to the tertiary recovery methods, especially chemical EOR. Polymer flooding (PF) is a promising chemical EOR technology to provide incremental oil and extend the field life. Therefore, the main features of PF were investigated and screened for the Uzen field conditions within the scope of the feasibility study. The main geological characteristics of the reservoir were examined to confirm polymer flooding applicability. Reservoir dynamics analysis was conducted to identify the main problems of the current development strategy. Water composition analysis was carried out to assess available water sources in terms of polymer compatibility. Based on Daqing oilfield PF experience, the watercut dynamic behavior was used to determine incremental oil amount for the potential pilot area in Uzen. Since technical feasibility studies are done, economical feasibility has been conducted considering current oil prices. Parameters such as temperature, permeability, oil viscosity, and brine salinity were found to be the most critical for polymer flood. Two water sources out of three available in the Uzen showed the compatibility of polymers according to water composition analysis. The first priority is given to Cretaceous formation brine as the most appropriate and the second priority is given to Caspian seawater. The potential pilot area with 3 injectors and 14 producers has been selected and forecasted in terms of PF production. PF technology performed for 10+ years resulting in 4.7% of incremental oil recovery. Polymer flooding has proven to be an effective development strategy as a tertiary recovery method that hopefully will be applied in the coming years. Although polymer flooding has been used for the past ~60 years, for the Uzen field polymer flooding is a step away from being applied for the first time. Observations and obtained results are the basis for future design, implementation, and optimization of PF in the Uzen oilfield.
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Kagnici, Fatih. "Engine Mount Vibration Sensitivity to Stiffness and Mass Properties of Major Components." In ASME 2014 12th Biennial Conference on Engineering Systems Design and Analysis. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/esda2014-20035.
Повний текст джерелаАнотація:
In order to have an optimized NVH design concept, the design engineers must exchange during the development a lot of attributes that together defines the new engine NVH performance. Moreover, each engine NVH system performance is dependent of many variables. In this respect, 6-Sigma methodology (DMAIC and DCOV) is an excellent tool to support engineers to evaluate systems variables and achieve the required performance. Engine mount brackets’ vibrations have high priority for the NVH performance of the powertrain. Effects of major components on the engine mount vibrations come up as a major topic whenever an error state takes place and improvement is required. This study aims to identify the effect of engine block, ladderframe, head and transmission stiffness and mass properties on 2EO acceleration levels of the 4 cylinder engine power train. Dynamic analysis will be performed under the kinematic engine loadings. There are 2 steps for identifying the objective. The first step is to eliminate the factors which has not significant main and cross effect on engine mount vibrations. Full factorial DOE runs with two levels are performed for this purpose. Hyperstudy tool is used for the DOE design, simulation automation and post processing. After defining the effective factors, 256 Latin Hypercube DOE runs are performed to obtain response surfaces and meta–model. DOE runs are done in Hyperstudy, results are exported to enCORE and transfer functions are calculated by Kriging method. According to the results, a proposed course of action for engine mounts’ accelerations DOE study is prepared and a methodology for this course is executed.