Application of neural networks to prediction of company future development

Application of neural networks to prediction of company future development is much more conceivable now than before. Exploitation of data is one of the most important parts of possible prediction of company development. There are a lot of possibilities how to apply such data and what particular neural network to chose. Development of neural networks dates from 1943 when Perceptron was described and a lot of neural networks have been developed since then. New hybrid neural networks, which are often more accurate than only single-layer and multi-layer networks are being developed even now. The way how they can learn and assess data is substantial for their application in economy.Використання нейронних мереж для прогнозування розвитку компанії в даний час уявити набагато легше, ніж раніше. Використання даних є однією з найбільш важливих складових прогнозу можливого розвитку компанії. Існує багато способів, як застосувати ці дані і яку конкретну нейронну мережу вибрати. Розробка нейронних мереж бере початок у 1943 році, коли був описаний «Перцептрон», і з тих пір нейронні мережі почали розвиватися все більше і більше. Навіть сьогодні постійно з’являються і розвиваються нові гібридні нейронні мережі, які є часто більш точними, ніж просто одношарові і багатошарові мережі. Те, яким чином можна вивчати і оцінювати дані, є вкрай важливим для їх використання в економіці.Использование нейронных сетей для прогнозирования развития предприятия в настоящее время можно намного более реально себе представить, чем раньше. Получение данных является одной из наиболее важных составляющих возможной предикции развития предприятия. Существует большое количество возможностей применения этих данных и выбора конкретной нейронной сети. Развитие нейронных сетей относится к 1943 году, когда был описан «Перцептрон», с тех пор начали развиваться другие нейронные сети. И сегодня постоянно появляются и развиваются новые гибридные нейронные сети, которые зачастую точнее однослойных и многослойных сетей. То, каким образом можно осваивать данные, является принципиальным для их использования в экономике

On minimal critical exponent of balanced sequences

We study the threshold between avoidable and unavoidable repetitions in infinite balanced sequences over finite alphabets. The conjecture stated by Rampersad, Shallit and Vandomme says that the minimal critical exponent of balanced sequences over the alphabet of size d≥5 equals [Formula presented]. This conjecture is known to hold for d∈{5,6,7,8,9,10}. We refute this conjecture by showing that the picture is different for bigger alphabets. We prove that critical exponents of balanced sequences over an alphabet of size d≥11 are lower bounded by [Formula presented] and this bound is attained for all even numbers d≥12. According to this result, we conjecture that the least critical exponent of a balanced sequence over d letters is [Formula presented] for all d≥11. © 2022075-02-2021-1387, 075-02-2022-877; České Vysoké Učení Technické v Praze, ČVUT: SGS20/183/OHK4/3T/14; Ministerstvo Školství, Mládeže a Tělovýchovy, MŠMT: CZ.02.1.01/0.0/0.0/16_019/0000778; Ministry of Education and Science of the Russian Federation, MinobrnaukaThe second author was supported by Czech Technical University in Prague , through the project SGS20/183/OHK4/3T/14 . The first and the third authors were supported by The Ministry of Education, Youth and Sports of the Czech Republic through the project CZ.02.1.01/0.0/0.0/16_019/0000778 . The fourth author acknowledges the support by the Ministry of Science and Higher Education of the Russian Federation (Ural Mathematical Center project No. 075-02-2021-1387 ) and by Ural Mathematical Center , project No. 075-02-2022-877

Proficiency and Interlaboratory Variability in the Determination of Phthalate and DINCH Biomarkers in Human Urine: Results from the HBM4EU Project

A quality assurance/quality control program was implemented in the framework of the EU project HBM4EU to assess and improve the comparability of biomarker analysis and to build a network of competent laboratories. Four rounds of proficiency tests were organized for 15 phthalate and two DINCH urinary biomarkers (0.2-138 ng/mL) over a period of 18 months, with the involvement of 28 laboratories. A substantial improvement in performance was observed after the first round in particular, and by the end of the program, an average satisfactory performance rate of 90% was achieved. The interlaboratory reproducibility as derived from the participants' results varied for the various biomarkers and rounds, with an average of 24% for the biomarkers of eight single-isomer phthalates (e.g., DnBP and DEHP) and 43% for the more challenging biomarkers of the mixed-isomer phthalates (DiNP, DiDP) and DINCH. When the reproducibility was based only on the laboratories that consistently achieved a satisfactory performance, this improved to 17% and 26%, respectively, clearly demonstrating the success of the QA/QC efforts. The program thus aided in building capacity and the establishment of a network of competent laboratories able to generate comparable and accurate HBM data for phthalate and DINCH biomarkers in 14 EU countries. In addition, global comparability was ensured by including external expert laboratories.This study was part of the HBM4EU project receiving funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No 733032. Co-funding was received from the Dutch Ministry of Agriculture, Nature and Food Quality (project KB 37-002-014-001/002).S

Global Analysis of Proline-Rich Tandem Repeat Proteins Reveals Broad Phylogenetic Diversity in Plant Secretomes

Cell walls, constructed by precisely choreographed changes in the plant secretome, play critical roles in plant cell physiology and development. Along with structural polysaccharides, secreted proline-rich Tandem Repeat Proteins (TRPs) are important for cell wall function, yet the evolutionary diversity of these structural TRPs remains virtually unexplored. Using a systems-level computational approach to analyze taxonomically diverse plant sequence data, we identified 31 distinct Pro-rich TRP classes targeted for secretion. This analysis expands upon the known phylogenetic diversity of extensins, the most widely studied class of wall structural proteins, and demonstrates that extensins evolved before plant vascularization. Our results also show that most Pro-rich TRP classes have unexpectedly restricted evolutionary distributions, revealing considerable differences in plant secretome signatures that define unexplored diversity

Brewer's spent grain from different types of malt: Evaluation of the antioxidant activity and identification of the major phenolic compounds

The antioxidant activity and phenolic composition of brewer's spent grain (BSG) extracts obtained by microwave-assisted extraction from twomalt types (light and darkmalts) were investigated. The total phenolic content (TPC) and antioxidant activity among the light BSG extracts (pilsen, melano, melano 80 and carared)were significantly different (p b 0.05) compared to dark extracts (chocolate and black types), with the pilsen BSG showing higher TPC (20 ± 1 mgGAE/g dry BSG). In addition, the antioxidant activity assessed by 2,2-diphenyl- 1-picrylhydrazyl, 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) and deoxyribose assays decreased as a result of increasing kilning temperatures in the following order: pilsen N melano N melano 80 N carared N chocolate N black. HPLC-DAD/ESI-MS/MS analysis indicated the presence of phenolic acids, such as ferulic, p-coumaric and syringic acids, as well as several isomeric ferulate dehydrodimers and one dehydrotrimer. Chocolate and black extracts, obtained frommalts submitted to the highest kilning temperatures, showed the lowest levels of ferulic and p-coumaric acids. These results suggested that BSG extracts from pilsen malt might be used as an inexpensive and good natural source of antioxidants with potential interest for the food, pharmaceutical and/or cosmetic industries after purification

Ultramafic vegetation and soils in the circumboreal region of the Northern Hemisphere

The paper summarizes literature on climate, soil chemistry, vegetation and metal accumulation by plants found on ultramafic substrata in the circumboreal zone (sensu Takhtajan, Floristic regions of the world, 1986) of the Northern Hemisphere. We present a list of 50 endemic species and 18 ecotypes obligate to ultramafic soils from the circumboreal region of Holarctic, as well as 30 and 2 species of Ni and Zn hyperaccumulators, respectively. The number of both endemics and hyperaccumulators are markedly lower compared to that of the Mediterranean and tropical regions. The diversity of plant communities on ultramafics soils of the circumboral region is also described. The underlying causes for the differences of ultramafic flora between arctic, cold, cool temperate and Mediterranean and tropical regions are also discussed. © 2018, The Ecological Society of Japan

Tests of thermal and radiation embrittlement of reactor steel 15CH2MFA

Results are presented of mechanical destructive and magnetic nondestructive tests of the 15Ch2MFA steel, used for pressure vessels of the VVER40 reactor type. Two series of samples were tested: (i) samples, embrittled by a special thermal processing, and (ii)samples, embrittled in a reactor by high fluences of neutron radiation. Results of mechanical impact Charpy tests are compared with results of Magnetic Adaptive Testing carried out on the two sample series. The existence of mutual correlation between the two types of examination indicates alternative of replacement of the mechanical destructive tests of classical surveillance samples by magnetic tests, which are nondestructive

Co-Mn Mixed Oxide Catalysts Supported on Stainless Steel Meshes Prepared by Hydrothermal Method.

In this study, we prepared the Co-Mn mixed oxides supported on stainless steel meshes by simultaneous precipitation of Co and Mn nitrates in the presence of hydrolyzing urea under hydrothermal conditions, followed by heating at 500 °C in air

Ceria-Zirconia Coated Stainless Steel Meshes as Supports of Cobalt Oxide Catalysts.

In this study we attempted to increase stability of the cobalt oxide layer on the stainless steel support to application of ceria-zirconia interlayer