scholarly journals Generate plane quad mesh with neural networks and tree search

2021 ◽  
Author(s):  
Hua Tong ◽  
Yong Ni
Keyword(s):  
Mesh Generation ◽  
Target Function ◽  
Tree Search ◽  
The Finite Element Method ◽  
Monte Carlo Tree Search ◽  
State Action ◽  
Business Software ◽  
History Of ◽  
Speed Up

The quality of mesh generation has long been considered a vital aspect in providing engineers with reliable simulation results throughout the history of the Finite Element Method (FEM). The element extraction method, which is currently the most robust method, is used in business software. However, in order to speed up extraction, the approach is done by finding the next element that optimizes a target function, which can result in local mesh of bad quality after many time steps. We provide TreeMesh, a method that uses this method in conjunction with reinforcement learning (also possible with supervised learning) and a novel Monte-Carlo tree search (MCTS) (Coulom(2006), Kocsis and Szepesvári(2006), Browne et~al.(2012)). The algorithm is based on a previously proposed approach (Pan et~al.(2021)). After making many improvements on DRL (algorithm, state-action-reward setting) and adding a MCTS, it outperforms the former work on the same boundary. Furthermore, using tree search, our program reveals much preponderance on seed-density-changing boundaries, which is common on thin-film materials.

scholarly journals Development of customs infrastructure on the Ukrainian –Polish border in the conditions of business internationalization

2021 ◽  
Vol 2021 (2) ◽  
pp. 140-148
Author(s):  
Marta Adamiv ◽  
◽  
Mariana Ruda ◽  
Keyword(s):  
Foreign Trade ◽  
Economic Importance ◽  
Export Market ◽  
The European Union ◽  
Present Stage ◽  
Great Economic Importance ◽  
History Of ◽  
Speed Up ◽  
Trade Partners

The relations between Ukraine and Poland represent a long history of partnership and have a great economic importance for both countries. At the present stage, Poland is one of the largest international trade partners of our country. In the history of Ukraine's foreign trade during 2019-2020, Poland occupied second place in the structure of domestic exports. Thus, in 2020 the share of exports of Ukrainian goods to Poland was 6.65%. First of all, it means a change in the vector of foreign trade development for the national economy and the reorientation of Ukraine's export market to the European Union. In 2020, Poland also occupied one of the leading positions in the structure of Ukrainian imports of goods (4th place with a share of 7.62%). This situation leads to a significant increase in the load at checkpoints and causes the need to ensure prompt and efficient customs clearance of goods moving across the Ukrainian-Polish border. On the basis of the performed researches, significant differences in the levels of development of the customs services of Poland and Ukraine in terms of the quality of customs services have been established, as Ukraine lags far behind Poland in all the studied indicators in this area. Such situation requires the improvement of the work of Ukrainian customs authorities in the context of business internationalization, including the development of customs infrastructure in the area of the Ukrainian-Polish border. The key problems of customs service of enterprises at domestic checkpoints include long and costly customs procedures, lack of proper technical, road, information infrastructure at checkpoints, outdated technical instruments of customs control, etc. It is proved that in the conditions of business internationalization one of the key tasks should be the construction of new checkpoints and the development of the customs infrastructure of the existing checkpoints. The key strategically important checkpoints in the area of the Ukrainian-Polish border, which need to be modernized in order to increase their capacity, include road checkpoints "Korchova-Krakivets", "Dorokhusk-Yagodyn", "Medyka-Shehyni", as well as a railway checkpoint "Medyka-Mostyska". In addition, the importance of spreading the practice of construction of joint checkpoints, which allows to significantly speed up the process of customs services for businesses, was emphasized.

scholarly journals Generalized Mean Estimation in Monte-Carlo Tree Search

2020 ◽  
Author(s):  
Tuan Dam ◽  
Pascal Klink ◽  
Carlo D'Eramo ◽  
Jan Peters ◽  
Joni Pajarinen
Keyword(s):  
Monte Carlo ◽  
Tree Search ◽  
Power Mean ◽  
Monte Carlo Tree Search ◽  
Average Value ◽  
Mean Estimation ◽  
Markov Decision ◽  
Speed Up ◽  
Upper Confidence Bound ◽  
Partially Observable

We consider Monte-Carlo Tree Search (MCTS) applied to Markov Decision Processes (MDPs) and Partially Observable MDPs (POMDPs), and the well-known Upper Confidence bound for Trees (UCT) algorithm. In UCT, a tree with nodes (states) and edges (actions) is incrementally built by the expansion of nodes, and the values of nodes are updated through a backup strategy based on the average value of child nodes. However, it has been shown that with enough samples the maximum operator yields more accurate node value estimates than averaging. Instead of settling for one of these value estimates, we go a step further proposing a novel backup strategy which uses the power mean operator, which computes a value between the average and maximum value. We call our new approach Power-UCT, and argue how the use of the power mean operator helps to speed up the learning in MCTS. We theoretically analyze our method providing guarantees of convergence to the optimum. Finally, we empirically demonstrate the effectiveness of our method in well-known MDP and POMDP benchmarks, showing significant improvement in performance and convergence speed w.r.t. state of the art algorithms.

Pengaruh Kualitas Sumber Daya Manusia, Pemanfaatan Teknologi Informasi, Dan Sistem Pengendalian Intern Terhadap Ketepatwaktuan Pelaporan Keuangan Pemerintah Desa

2018 ◽  
Vol 26 (2) ◽  
pp. 131-143
Author(s):  
Marlinawati Marlinawati ◽  
Dewi Kusuma Wardani
Keyword(s):  
Information Technology ◽  
Control System ◽  
Human Resources ◽  
Financial Reporting ◽  
Internal Control ◽  
Positive Influence ◽  
Internal Control System ◽  
Speed Up ◽  
Village Government

The purpose of this research is to know the influence between the Quality of Human Resources, Utilization of Information Technology and Internal Control System Against Timeliness of Village Government Financial Reporting at Gunungkidul Regency. This research is causative research. The population is the village government in Gunungkidul Regency, especially in Gedangsari subdistrict. Criteria of respondents in the study were to village and village apparatus. We use questionnaire to collect data. We use multiple regression with SPSS program version 16.0 to analyze data. We find that quality of human resources and internal control system have a positive influence on the timeliness of village government financial reporting. On the other hand, utilization of information technology does not influence the timeliness of village government financial reporting. These imply that the quality of human resources and internal control system can speed up the preparation of village government financial reporting.

Methods of parallel computing for multilevel fuzzy Takagi – Sugeno systems

2016 ◽  
pp. 141-149
Author(s):  
S.V. Yershov ◽  
◽  
R.М. Ponomarenko ◽  
Keyword(s):  
Dynamic Models ◽  
Fuzzy Inference ◽  
Knowledge Bases ◽  
Comparative Characteristic ◽  
Software Systems ◽  
Scientific Papers ◽  
Speed Up ◽  
Diagnostic Software ◽  
Takagi Sugeno

Parallel tiered and dynamic models of the fuzzy inference in expert-diagnostic software systems are considered, which knowledge bases are based on fuzzy rules. Tiered parallel and dynamic fuzzy inference procedures are developed that allow speed up of computations in the software system for evaluating the quality of scientific papers. Evaluations of the effectiveness of parallel tiered and dynamic schemes of computations are constructed with complex dependency graph between blocks of fuzzy Takagi – Sugeno rules. Comparative characteristic of the efficacy of parallel-stacked and dynamic models is carried out.

Probiotics in gastroenterology – from a different angle

2013 ◽  
Vol 154 (8) ◽  
pp. 294-304 ◽  
Author(s):  
György Miklós Buzás
Keyword(s):  
Side Effects ◽  
Beneficial Effect ◽  
Analytical Data ◽  
Well Being ◽  
Gastrointestinal Diseases ◽  
Convincing Evidence ◽  
Probiotic Treatment ◽  
History Of ◽  
Irritable Bowel

After a short overview of the history of probiotics, the author presents the development of human intestinal microflora based on the newest genetic data and the microbiological features of main probiotics. The indications of probiotic administration have been defined and extended in recent years. The author reviews significant results of probiotic treatment in some gastrointestinal diseases based on meta-analytical data. Probiotics are useful in preventing and treating diarrhoea caused by antibiotics and Clostridium difficile caused diarrhoea. In the treatment of Helicobacter pylori infection, preparations containing certain Lactobacillus,Bifidobacterium strains or Saccaromyces boulardii could enhance by 5–10% the rate of successful eradication and reduce the incidence and severity of the side effects. Some symptoms of irritable bowel syndrome and thus the quality of life can be improved by probiotics. Their beneficial effect in ulcerative colitis was proven, while in Crohn’s disease has not yet been defined. The use of probiotics is not included in guidelines, with the exception of the Maastricht IV/Florence consensus. For each disease it is advisable to use probiotics containing strains only with proven beneficial effect. The efficiency of preparations containing mixed strains has not yet been properly investigated. The author reviews the rare but potentially serious side effects of probiotics. In Hungary, there are many probiotic preparations available which can be purchased in pharmacies without prescription: their use is more empirical than evidence-based. The European Food Safety Authority has recently rejected claims for probiotics to be classed as medicines given the lack of convincing evidence on the effects of probiotics on human health and well-being. Clearly, further research is needed to collect evidence which could be incorporated into the international guidelines. Orv. Hetil., 2013, 154, 294–304.

Towards Predicting Relative Belt Edge Endurance With the Finite Element Method

1990 ◽  
Vol 18 (4) ◽  
pp. 216-235 ◽  
Author(s):  
J. De Eskinazi ◽  
K. Ishihara ◽  
H. Volk ◽  
T. C. Warholic
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Three Dimensional ◽  
The Finite Element Method ◽  
Shear Deformations ◽  
Element Analysis ◽  
Vertical Loading ◽  
Predicted Values ◽  
Element Method

Abstract The paper describes the intention of the authors to determine whether it is possible to predict relative belt edge endurance for radial passenger car tires using the finite element method. Three groups of tires with different belt edge configurations were tested on a fleet test in an attempt to validate predictions from the finite element results. A two-dimensional, axisymmetric finite element analysis was first used to determine if the results from such an analysis, with emphasis on the shear deformations between the belts, could be used to predict a relative ranking for belt edge endurance. It is shown that such an analysis can lead to erroneous conclusions. A three-dimensional analysis in which tires are modeled under free rotation and static vertical loading was performed next. This approach resulted in an improvement in the quality of the correlations. The differences in the predicted values of various stress analysis parameters for the three belt edge configurations are studied and their implication on predicting belt edge endurance is discussed.

EXPLORING HEALTHCARE ARCHITECTURE THROUGH THE MEDIUM OF FILM: Motives and Techniques

2014 ◽  
Vol 8 (1) ◽  
pp. 29
Author(s):  
Stephen Verderber
Keyword(s):  
Real World ◽  
The Real ◽  
Healthcare Settings ◽  
Interdisciplinary Field ◽  
Body Of Knowledge ◽  
Behavior Setting ◽  
Physical Environments ◽  
Scant Attention ◽  
History Of

The interdisciplinary field of person-environment relations has, from its origins, addressed the transactional relationship between human behavior and the built environment. This body of knowledge has been based upon qualitative and quantitative assessment of phenomena in the “real world.” This knowledge base has been instrumental in advancing the quality of real, physical environments globally at various scales of inquiry and with myriad user/client constituencies. By contrast, scant attention has been devoted to using simulation as a means to examine and represent person-environment transactions and how what is learned can be applied. The present discussion posits that press-competency theory, with related aspects drawn from functionalist-evolutionary theory, can together function to help us learn of how the medium of film can yield further insights to person-environment (P-E) transactions in the real world. Sampling, combined with extemporary behavior setting analysis, provide the basis for this analysis of healthcare settings as expressed throughout the history of cinema. This method can be of significant aid in examining P-E transactions across diverse historical periods, building types and places, healthcare and otherwise, otherwise logistically, geographically, or temporally unattainable in real time and space.

Reduction of number of postoperative complications depends on quality of dressing material and wound treatment

2020 ◽  
pp. 61-63
Author(s):  
Larisa Katkasova ◽  
Svetlana Kropotova
Keyword(s):  
At Risk ◽  
Wound Healing ◽  
Postoperative Complications ◽  
Wound Treatment ◽  
Postoperative Wound ◽  
Speed Up ◽  
Modern Technologies

Operated patients suffering from diabetes are at risk of developing postoperative complications. Modern technologies of postoperative wound treatment and modern dressings allow to avoid complications and speed up the process of postoperative wound healing.

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