Determination of the requirement for transportation and technological machines by clusterization of oil and gas production departments

The article considers the analysis of production indicators of oil and gas production departments with the aim of clustering them for the subsequent determination of the need for automobiles and technological machines. The departments have different sizes, power, are in different conditions, are characterized by different performance indicators, but at the same time they are equipped with vehicles according to the same standards. This leads to problems in ensuring the uninterrupted transport and technological service of the main production. In a number of departments, situations arise when the planned number of transport and technological machines is not enough to perform technological operations for the repair or maintenance of wells. In this case, vehicles are sent from another sub-division, thereby limiting their own transport service capabilities. Fleet planning often takes place taking into account the historical conditions of the department, which is generally applicable for old departments with an established well stock, but practically does not work for newly formed departments with large volumes of newly commissioned wells and complicated production conditions. These subdivisions are equipped with vehicles in relation to existing workshops with similar indicators, which most often leads to an insufficient number of machines and downtime of the main production due to lack of machines. In this regard, it is necessary to search for and justify those production indicators of departments that determine their differentiation. The aim of the paper is to increase the efficiency of transport and technological service of oil and gas production facilities based on determining the patterns of influence of production indicators of production and gas shops on the need for transport and technological machines and developing, on this basis, differentiated standards for equipping units with vehicles. Using machine learning methods, the clustering of production units was carried out, and the factors that determine the distribution of departments into four groups were identified. The main factors include the stock of wells in the department and the degree of complexity of this stock. Groups are determined by the degree of change in these factors. The presented approach and the resulting distribution can be used as a basis for more efficient standardization of the needs of departments in automobiles and technological machines and also as part of decision support systems for vehicle fleet management

JUMPING FROG METHOD FOR OPTIMAL CLASSIFICATIONS

In the article the problem of finding optimal classifications on a finite set is investigated. It is shown that the problem of finding an optimal classification is generated by a tolerance relation on a finite set. It is also reduced to an optimization problem on a set of permutations. It is proposed a modification of the mixed jumping frogs to find suboptimal solutions of the problem of classification.In the article the problem of finding optimal classifications on a finite set is investigated. It is shown that the problem of finding an optimal classification is generated by a tolerance relation on a finite set. It is also reduced to an optimization problem on a set of permutations. It is proposed a modification of the mixed jumping frogs to find suboptimal solutions of the problem of classification

Accelerator complex based on DC-60 cyclotron

DC-60 heavy ion accelerator, put into operation in 2006, according to its specifications - spectrum, charge and energy of accelerated ions, has the high scientific, technological and educational potential. The highest possible universality both by spectrum of accelerated ions and acceleration energy and regimes was built in DC-60 heavy ion accelerator designing. The new interdisciplinary research complex based on cyclotron DC-60 makes it possible to create a highly-developed scientific-technological and educational environment in the new capital of Kazakhstan..

Accelerator complex based on DC-60 cyclotron

DC-60 heavy ion accelerator, put into operation in 2006, according to its specifications - spectrum, charge and energy of accelerated ions, has the high scientific, technological and educational potential. The highest possible universality both by spectrum of accelerated ions and acceleration energy and regimes was built in DC-60 heavy ion accelerator designing. The new interdisciplinary research complex based on cyclotron DC-60 makes it possible to create a highly-developed scientific-technological and educational environment in the new capital of Kazakhstan..

Millisecond-range electron spin memory in singly-charged InP quantum dots

We report millisecond-range spin memory of resident electrons in an ensemble of InP quantum dots (QDs) under a small magnetic field of 0.1 T applied along the optical excitation axis at temperatures up to about 5 K. A pump-probe photoluminescence (PL) technique is used for optical orientation of electron spins by the pump pulses and for study of spin relaxation over the long time scale by measuring the degree of circular polarization of the probe PL as a function of pump-probe delay. Dependence of spin decay rate on magnetic field and temperature suggests two-phonon processes as the dominant spin relaxation mechanism in this QDs at low temperatures.Comment: 3 pages, 4 figures, submitted to Appl. Phys. Let

Integrity of H1 helix in prion protein revealed by molecular dynamic simulations to be especially vulnerable to changes in the relative orientation of H1 and its S1 flank

In the template-assistance model, normal prion protein (PrPC), the pathogenic cause of prion diseases such as Creutzfeldt-Jakob (CJD) in human, Bovine Spongiform Encephalopathy (BSE) in cow, and scrapie in sheep, converts to infectious prion (PrPSc) through an autocatalytic process triggered by a transient interaction between PrPC and PrPSc. Conventional studies suggest the S1-H1-S2 region in PrPC to be the template of S1-S2 $\beta$-sheet in PrPSc, and the conformational conversion of PrPC into PrPSc may involve an unfolding of H1 in PrPC and its refolding into the $\beta$-sheet in PrPSc. Here we conduct a series of simulation experiments to test the idea of transient interaction of the template-assistance model. We find that the integrity of H1 in PrPC is vulnerable to a transient interaction that alters the native dihedral angles at residue Asn$^{143}$, which connects the S1 flank to H1, but not to interactions that alter the internal structure of the S1 flank, nor to those that alter the relative orientation between H1 and the S2 flank.Comment: A major revision on statistical analysis method has been made. The paper now has 23 pages, 11 figures. This work was presented at 2006 APS March meeting session K29.0004 at Baltimore, MD, USA 3/13-17, 2006. This paper has been accepted for pubcliation in European Biophysical Journal on Feb 2, 200

Проблема фальсификации зернистой икры лососевых рыб и пути решения

The paper  examines the  problem of falsification of edible  fish products, which concerns producers and consumers worldwide. Food products are most often falsified by imparting them some of the most typical features, for example appearance, upon  the overall  worsening or losing the other most  significant properties of nutritional value, including safety. Market analysis shows that there is a tendency of replacing natural roe with imitated roe by its selling  in metal and glass jars with indication of the address of the Far Eastern producer. It has been established that the protein  content is not higher than one percent upon  imitated roe production using  modern technologies. To establish product authenticity, a methodology for measuring the protein mass fraction in grained salmonid roe by the Kjeldahl method was developed. The metrological characteristic of the developed methodology in three concentration ranges is presented. The used values  can serve for identification of claimed properties with the  specified  indicators of accuracy, trueness, repeatability and reproducibility. In addition to the methodology, product organoleptic indicators are proposed, including assessment of appearance, consistency, taste, odor, as well as specific features of the cooking test  that can serve as distinctive features and are taken into consideration in identification of grained salmonid roe.В статье рассмотрена проблема фальсификации пищевой рыбной продукции, которая беспокоит производителей и потребителей во всем  мире. Фальсификация пищевых продуктов чаще  всего осуществляется путем  придания продуктам отдельных наиболее типичных признаков — например, внешнего вида  при общем ухудшении или утрате  остальных наиболее значимых свойств пищевой ценности, в том числе безопасности. Анализ  рынка показал, что наблюдается тенденция подмены натуральной икры  имитированной  путем  реализации ее в металлических и стеклянных банках  с указанием адреса Дальневосточного производителя. Установлено, что при  производстве имитированной икры  по современным технологиям содержание белка  не превышает одного процента. Для установления подлинности продукции разработана методика измерений массовой доли  белка  в зернистой икре  лососевых рыб методом Кьельдаля. Представлена метрологическая характеристика разработанной методики в трех  диапазонах концентраций. Использованные значения могут  служить  для  идентификации  заявленных свойств с установленными показателями точности, правильности, повторяемости и воспроизводимости. В дополнении к методике предложены органолептические показатели продукции, включающие оценку внешнего вида,  консистенции, вкуса, запаха, а также  особенности пробы  на варку, которые могут служить в качестве отличительных признаков и учитываться при проведении идентификации икры  зернистой лососевых видов  рыб