bluuebunny/crossref_metadata_2025 huggingface dataset:
Automatic Dissolution Testing with High-Temporal Resolution for Both Immediate-Release and Fixed-Combination Drug Tablets
Authors: Chi Zhongmei , Azhar Irfan , Khan Habib , Yang Li , Feng Yunxiang
Published: November 2019

Dissolution testing plays many important roles throughout the pharmaceutical industry, from the research and development of drug products to the control and evaluation of drug quality. However, it is a challenging task to perform both high-efficient separation and high-temporal detection to achieve accurate dissolution profile of each active ingredient dissolved from a drug tablet. In our study, we report a novel non-manual-operation method for performing the automatic dissolution testing of drug tablets, by combining a program-controlled sequential analysis and high-speed capillary electrophoresis for efficient separation of active ingredients. The feasibility of the method for dissolution testing of real drug tablets as well as the performance of the proposed system has been demonstrated. The accuracy of drug dissolution testing is ensured by the excellent repeatability of the sequential analysis, as well as the similarity of the evaluation of dissolution testing. Our study show that the proposed method is capable to achieve simultaneous dissolution testing of multiple ingredients, and the matrix interferences can be avoided. Therefore it is of potential valuable applications in various fields of pharmaceutical research and drug regulation.
Variable parameter and variable frequency‐based IPT charging system with configurable charge current and charge voltage
Authors: Mai Ruikun , Li Qiao , Chen Yang , Yang Bin , He Zhengyou
Published: November 2019

Variable parameter (VP) or variable frequency (VF) methods for load‐independent output current or output voltage in inductive power transfer (IPT) systems have been widely studied. This study proposes an IPT system based on series‐series compensation topology with VP and VF methods to achieve constant‐current–constant‐voltage (CC–CV) charging for electric bicycles (EBs). The proposed IPT system can operate in CC and CV modes regardless of load conditions at two different operating frequencies with corresponding values of compensation capacitors. The rating current/voltage of the proposed method is configurable by altering the compensation capacitor and operational frequency. Therefore, one charging stand can be shared by various EBs to save the space and to cut the overall cost. Only one capacitor is needed for one EB specification. The proposed IPT system can achieve zero‐voltage switching under all load conditions. An experimental prototype with two ratings of 48 V/3A and 60 V/4A is built to verify the feasibility of the proposed method. The experimental results demonstrate the feasibility of the proposed method.
Experimental Comparison of Outdoor Baseline Measurements by Different Methods
Authors: Gu Youyi , Wang Li , Xiang Fengzhuo , Ouyang Wen , Jiang Lixing
Published: November 2019

Outdoor baseline is the special length standard in the field of surveying and mapping, it can be used to verify the addition and multiplication constants of the total station and other photoelectric rangefinders. In order to ensure the authenticity, accuracy and reliability of verification results, conducting outdoor baseline traceability periodically is essential. At present, direct measurement by 24m invar tape or high precision electro-optical measurement is mainly used to achieve the traceability of outdoor baseline in China. Based on Shenyang baseline field, high precision rangefinder μ-base, 24m invar tape and high precision GNSS receivers are used for comparison experiments, and the experimental results are analyzed.
Study on the effect of samplers on the disturbance of dredger-filled soil structure by numerical simulation layering method
Authors: Li Zhijie , Song Jing , Zhao Zhou , Yang Shouying , Huang Jiansen , Huang Weibiao
Published: November 2019

Through the use of the particle flow software simulation, the influences on the microscopic dynamic properties of high viscosity soft soil caused by the inner diameter, cut angle and wall thickness of the samplers were studied with the example of the dredged mud. The motion behavior of the inflection point of particle characteristics was compared in seven soil samples by dividing the soil layers. The results show that a convective displacement field of the soil particles is formed at the bottom, and the particles above the convection are mainly subject to tensile expansion while the particles below the convection are mainly compressed and contracted, which result in the regular changes in porosity and bending deformation of the soil layers. There is a synergistic relationship between the intersection of the porosity curve and the initial porosity curve and the convective position of the particle displacement field. There is a characteristic inflection point in the interlayer particle displacement with the soil layers behave as a bending deformation. The particle disturbance between the inflection points is not obvious and the particle disturbance outside the inflection points is larger. The deformation feature can be fitted to a rotating paraboloid with the lower opening and the disturbance of the seven groups soil samples can be assessed initially by the a value of the surface equation. The line connecting the inflection points of the interlayer features can be refitted to a paraboloid of rotation. The ratio of the volume of the paraboloid to the volume of the soil sample can be used to evaluate the originality of the soil sample.
Analysis of Influence Factors of GF-4 Registration Accuracy on Sea Ice Drift in the Bohai Sea
Authors: Wang Ruifu , Wei Pan , Zhao Yingjie
Published: November 2019

The “GF-4” satellite is China’s first high resolution geostationary optical remote sensing satellite. It has the unique advantages of short imaging time interval (20s) and high resolution (50m). In order to analyze the effect of GF-4 satellite image registration accuracy on sea ice drift in Bohai Sea, firstly, the orthorectification of the 28 image data available from August 2016 to March 2018 in the Bohai Sea area was carried out. Then we selected the sea-land edge points as control points, and registration of two images which have the same time interval. Next, we recorded the marked same name points which searched from the bottom of Liaodong bay, east of Liaodong bay and west of Liaodong bay respectlly. We statisticed the direction and frequency of land point offset sub-regionally, then we created the rose plots and maked histogram of the offset of land point. The results show that, when the time interval is 4 hours and 24 hours, the dominant migration direction in the three regions in Liaodong bay is east; when the time interval is 1 minute, the dominant migration direction in Liaodong Bay bottom and Liaodong Bay west coast land is south, Followed by east and southeast respectively; the dominant migration in Liaodong Bay East Coast is north, followed by east; When the time interval is 3 hours, the dominant migration direction in west of Liaodong Bay, bottom of Liaodong Bay and east of Liaodong bay are east, west and south respectively, followed by southeast, east, southeast respectively. The land offset in three regions is major centralized distribution in a range which is from 60m to 80m. That is to say, the offset of land is basically equal to 1.2 times of pixels, and the maximum land offset is less than 2 times of pixels. Through statistical analysis, it can be seen that with the increase of time interval, the land offset will not change much. This study also paves the way for the study of the drift of sea ice.
Preventive effect of Shuidouchi (short-term fermented soybean) on dextran sulfate sodium (DSS)-induced colitis in mice
Authors: Tan Fang , Liao Wei , Zhao Xin
Published: November 2019

In this study, mice colitis model was induced by dextran sodium sulfate (DSS), and the preventive effect of Shuidouchi on colitis was observed. The mice were divided into normal group, model group, low-content Shuidouchi feeding group, high-content Shuidouchi feeding group and sulfasalazine group. Serum and colon tissues of mice were detected by endothelin-1 (ET-1), somatostatin (SS), substance P (SP), vasoactive intestinal peptide (VIP), myeloperoxidase (MPO), glutathione (GSH), malondialdehyde (MDA), superoxide dismutase (SOD), interleukin-2 (IL-2), interleukin-10 (IL-10) kits. The results showed that compared with the model group, the feeding of Shuidouchi could significantly increase the length of colon and the ratio of colon weight to colon length in colitis mice (p < 0.05). By feeding Shuidouchi, the serum levels of ET, SP, IL-10 were decreased and SS, VIP, IL-2 were increased in mice with colitis. Detection of colon tissue in mice showed that Shuidouchi could significantly increase the levels of GSH, SOD and decrease the MPO, MDA levels in colitis mice (p < 0.05). It can be seen from this that Shuidouchi has a good preventive effect on colitis.
Analysis on the Characteristics of Illegal Cutting and Deforestation of Pinus kesiya in Lancang County of Yunnan Province
Authors: Xue Xiaoming , Nan Chenghui , Deng Chenkang , Liu Xi , Wang Zehui , Dao Bin
Published: November 2019

Lancang county, Yunnan Province is located in the southwestern border of Yunnan Province, , China and has abundant forest resources. At the same time, there are many cases of illegal logging and deforestation in Lancang county. In the county, the cases of illegal logging and deforestation of Pinus kesiya were mainly carried out by rural personnel, the single-person case was converted into a form of gang, the remoteness of the crime site makes it difficult to find and investigate, especially in most of the rural collective forests, etc. The main reasons for its occurrence are: the general public’s lack of legal awareness and economic poverty. A series of preventive measures and strike strategies, such as perfecting the system of recruiting personnel and intensifying the crackdown on such cases, were proposed to provide theoretical support for the protection and development of Pinus kesiya resources Lancang County.
Standard Model physics at ATLAS
Authors: Soldatov E. Yu.
Published: November 2019

The latest advances in Standard Model measurements performed by the ATLAS experiment at the LHC are discussed. Vector-boson scattering processes have been observed in several final states (ZZ,WZ, same-signWW), and evidence has been reached in theZγfinal state. The experimental precision of QCD measurements has reached the same order as the theoretical uncertainties on the NNLO calculations. Evidence for the triboson WVV final state has been achieved. The latest results onV+jets,Zγ,W+W−and direct photons production are presented. New results on jet substructure and forward proton tagging program are also discussed.
Bc excitations at LHC: first observations and further research prospects
Authors: Berezhnoy A. V. , Belov I. N. , Likhoded A. K. , Luchinsky A. V.
Published: November 2019

Status of the Bc meson excitatons search is presented in our work. We discuss the 2S Bc states first discovered by ATLAS and newly confirmed by CMS and LHCb collaborations. We review the observation prospects for the rest predicted states (B∗c, 2P wave, 3P wave and D wave) at LHC experiments. Cascade decays to the ground state as well as direct decays to the lepton pair are regarded for these states.
ϒ(3S) and χb(3P) production and polarization in the NRQCD with kT–factorization
Authors: Abdulov Nizami , Lipatov Artem
Published: November 2019

The ϒ(3S) production and polarization at high energies is studied in the framework of kT–factorization approach. Our consideration is based on the non-relativistic QCD formalism for bound states formation and off-shell production amplitudes for hard partonic subprocesses. The transverse momentum dependent (TMD, or unintegrated) gluon densities in a proton were derived from the CiafaloniCatani-Fiorani-Marchesini (CCFM) evolution equation as well as from the Kimber–Martin–Ryskin (KMR) prescription. Treating the nonperturbative color octet transitions in terms of the mulitpole radiation theory and taking into account feed-down contributions from radiative χb(3P) decays, we extract the corresponding non-perturbative matrix elements for ϒ(3S) and χb(3P) mesons from a combined fit to ϒ(3S) transverse momenta distributions measured by the CMS and ATLAS Collaborations at the LHC energies √s = 7 and 13 TeV and central rapidities. Then we apply the extracted values to investigate the polarization parameters λθ, λφ and λθφ, which determine the ϒ(3S) spindensity matrix. Our predictions have a good agreement with the currently available data within the theoretical and experimental uncertainties.
Nonlinear interactions of the radion field
Authors: Keyzerov Sergey , Volobuev Igor , Rakhmetov Edward
Published: November 2019

We study the Randall-Sundrum model with two branes. The Standard Model fields are localized on the brane with a negative tension, the gravitational field and scalar Goldberg-Wise field propagate in the multidimensional bulk. For this model we construct the Lagrangian for the scalar fluctuations of the gravitational and scalar fields above a background solution. We obtain an effective four-dimensional Lagrangian, which contains nonlinear self-interaction terms of the radion field up to the fourth order and nonlinear interactions of the radion and the Standard Model fields.
The exoplanet revolution
Authors: Miguel Yamila
Published: November 2019

Hot Jupiters, super-Earths, lava-worlds and the search for life beyond our solar system: the exoplanet revolution started almost 30 years ago and is now taking off.
Wolf pack algorithm for solving VLSI design tasks
Authors: Kuliev E V , Zaporozhets D Yu , Kureichik V V , Kursitys I O
Published: November 2019

The paper deals with the development of new and modified heuristic mechanisms of searching optimal solutions, which is considered as one of the main problems of artificial intelligence. One of the promising areas of artificial intelligence development is application of methods and models of biological systems behavior for solving NP-complete and NP-difficult optimization tasks. The paper presents the statement of the placement task in designing very large-scale integration circuits (VLSI). The authors propose the algorithm for solving this task on the basis of biological system behavior in nature, e.g. wolf pack. Wolves are considered as typical social animals having clear separation of social work. The paper describes the actions and rules of wolf pack behaviour in nature. Based on the wolves’ behaviour rules and actions, the authors present the modified wolf pack algorithm. The benefits of the developed modified algorithm include the ability to improve each following iteration of the placement task. The wolf pack algorithm is implemented as a computer software on Java. To estimate the effectiveness of the proposed approach, the authors use the well-known IBM benchmarks to compare with the developed algorithm. The comparison is implemented with the results of the following algorithms: Capo 8.6, Feng Shui 2.0, Dragon 2.23. The results show that the wolf pack algorithm is more effective than the analogues.
Hybrid method for prediction of users’ information behavior in the Internet based on bioinspired search
Authors: Bova V , Kravchenko Yu , Rodzin S , Kuliev E
Published: November 2019

The paper presents the method of predicting the learner preferences to make recommendations for building the behavior profile for recommender systems (assistants) personalizing the educational activity in the Internet space. To form the personal information offer and to identify the groups of collaborative filtration of the users with similar preferences, the authors propose the hybrid model of collaborative filtration based on the Item-Item CF and User-User CF methods simultaneously. To reduce the size of space during the search process, the author present a novel heuristic bioinspired algorithm based on the fish school behavior in nature. This method can be characterized by the ability to scale and process the sparse data. To estimate the quality of the developed algorithm, experimental research was carried out on the basis of the benchmark dataset MovieLens.
Experimental study and evaluation of parameters of M1 vehicle braking process
Authors: Afanasyev A S , Chudakova N V
Published: November 2019

The article presents the results of experimental studies of the braking process parameters, namely, the values of steady-state deceleration and its rise time, formed from the actual load of a vehicle, the presence (absence) of the anti-lock brake system (ABS) and trailer, the type and condition of road surface, as well as the connecting element between a vehicle and road surface - tires and the type of seasonality depending on the meteorological conditions. The mathematical models defining the studied value are presented and their practical significance is described. The practicability of the clarification of the methodology for the simulation of road traffic accidents by means of introducing correction factors into the main calculation methods aimed at the increase of the reliability and objectivity of the findings during road-transport expertise was justified.
Computer simulation of sublayer temperature mode during deposition of diamond coatings using gas-plasma method
Authors: Daudov I M , Khasambiev I V , Martynov S A , Luchaninov A A , Khadzhieva L K
Published: November 2019

The research presents a computer simulation of the temperature field on the sublayer surface, performed in a stationary mode during the deposition of diamond coatings using the gas-plasma method with different parameters of the cooling system. The optimization problem of mathematical programming with the search for the extremum of the performance function by varying the controlled parameters within the permissible range is considered.
Red mud thickener statistical model in MATLAB system identification toolbox
Authors: Fedorova E R , Trifonova M E , Mansurova O K
Published: November 2019

The process of red mud thickening and cleaning is a bottleneck of the alumina production. The existing automated systems of thickening process control are intended for the stabilization of parameters of primary process loops of thickeners. The relevant area of scientific research is making up and upgrade of the models and systems for the control of the thickening process under the model. The paper presents a model of a red mud thickener obtained on the basis of archive manufacturing data in the software environment MATLAB with the help of System Identification Toolbox. The measured parameters were the feed pulp consumption rate in the thickener, flocculant flow rate, thickened product consumption from the thickener’s cone and the thickened product density. The model allows predicting the density of a thickened product from the thickener cone. As an industrial prototype of red mud the authors used the mud from Ural Aluminum Plant, as a flocculant – Cytec Industries, series HX-3000.
The dynamic programming algorithm for management of real-time aircraft assignments
Authors: Korotkova Yu L , Mezentsev Yu A
Published: November 2019

The schedule is the basis of any airline. In this paper, we provide one of the problems of schedule theory. This problem of optimal management of flight schedule is to minimize flight departure delays and to improve flight on-time performance. This paper provides a conceptual and mathematical formulation of optimizing an operating flight schedule problem. The problem solution is to manage the assignments of specific air-crafts on flights considering the operational information about the implementation of the planned flight schedule. This problem is NP-hard and can not be solved exactly for any real dimensions. We propose the parametric effective algorithm for its approximate solution and provide the statistical data for testing.
Development and identification of a mathematical model of the process of continuous autoclave desorption of noble metals in moving-bed apparatus
Authors: Elshin V V , Melnik S A
Published: November 2019

The process of continuous autoclave desorption is the most promising for the intensification of coal-sorption technology for extracting noble metals by active carbons from solutions and pulps. The article presents a mathematical model of continuous autoclave desorption of gold from active carbons, which is based on the physicochemical regularities of the process and describes its dynamics. The developed mathematical model of the dynamics of the continuous desorption process allows analyzing the influence of the main parameters on the degree of extraction of gold and silver from activated carbons. It has been established that such parameters as temperature, phase ratio, processing time and pH of the elution solution have the greatest influence. Identification of the mathematical model showed satisfactory agreement between the experimental and the data obtained as a result of the simulation, which confirms the possibility of using it for analyzing and optimizing the process.
Model of the transducer based on Murali-Lakshmanan-Chua non-autonomous chaotic oscillator for discrete sensors intended for monitoring production processes
Authors: Patrusheva T V
Published: November 2019

The article discusses the model of the detector of periodic signals under the background noise intended for discrete type control devices. It is proposed to construct the detector based on the non-autonomous chaotic Murali – Lakshmanan – Chua oscillator. To detect, the parameters of a chaotic oscillator must ensure proximity to the bifurcation boundary between the periodic and chaotic modes. In the absence of the detectable signal at the input of a chaotic oscillator, chaotic motion is observed in it, and if present, a bifurcation occurs and a periodic mode is established. The numerical model that allows solving the Cauchy problem for the system of differential equations of the chaotic oscillator Murali – Lakshmanan – Chua has compiled in Matlab / Simulink. The output informative parameter of the detector is the number of chaotic bursts during the detection time. The proposed model allowed us to obtain empirical dependencies for the number of bursts. On the basis of the obtained dependencies, the choice of the optimal parameters of the system is made. The study as a whole led to the conclusion about the possibility of using the proposed detector as a node of devices that receive the measuring signal under the action of non-stationary interference.
Improving the methods of monitoring and automation and mathematical modelling of railway protection
Authors: Kuznetsov S M , Gavrilova Zh L , Teplouhov O J , Avetisyan B R , Markova S V
Published: November 2019

Thee paper analyzes the electric traction network and its features. The article shows that the use of one type of protection creates dead zones. To ensure reliability of the protection system, along with the maximum pulse protection system, digital terminal should be used.
New models and methods of organizing digital control with different representations of integral component
Authors: Rakov V I , Zakharova O V , Esin K S
Published: November 2019

The article proposes new methodological directions, models and methods of effective digital proportional-integral-differential (PID) control. The theoretic multiple models of the digital PID controller based on the discretization of the continuum model are proposed, differing in the component composition that significantly influences the dynamics of regulation. Mathematical models of digital control with the replacement of the integral in the continuum model by the Simpson’s rule are proposed, which are distinguished by the high accuracy of the formation of control actions in comparison with traditional mathematical models.
Automated control of unmanned truck for transport complex of mining industry
Authors: Bakhaev P K
Published: November 2019

The article is devoted to the development of robotized control mining-and-transport complex systems. The description of modern control mining-and-transport complex systems shows that operator control is currently used. During the replacement with robotic control systems, automatic and automated mining-and-transport complex control can be used. It is demonstrated that automated control can be considered the most promising control system. The article presents the advantages of automated control and the disadvantages of operator and automatic control, deals with electric drives of electric propulsion systems, which allows realizing automated mining-and-transport complex control. This electric propulsion system can be built on two or four motor wheels. In the article the authors review the advantages and disadvantages of the two electric propulsion systems, the utility of using the electric drive of all wheels of mining trucks for the implementation of automated control is proven.
Determination of the principal coordinates in solving the problem of the vertical dynamics of the vehicle using the method of mathematical modeling
Authors: Gozbenko V E , Kargapol’tsev S K , Kuznetsov B O , Karlina A I , Karlina Yu I
Published: November 2019

Attention to the theory of rolling stock oscillations is due primarily to the fact that oscillatory processes, which inevitably arise as a result of driving along a usually uneven road, degrade almost all the basic properties of rolling stock. The article considers oscillations of a four-axle vehicle with a double spring suspension. The study of oscillations with a finite number of degrees of freedom is simplified if we introduce the principal coordinates of this system. To simplify the finding of the principal coordinates, free and forced oscillations of the sprung parts of the vehicle are investigated. It is assumed that the body of the vehicle has two degrees of freedom: lateral motion and wabbling; bouncing and pitching of trolleys will be neglected. The total number of degrees of freedom of the model is two. Having set-up the kinetic and potential energy and using the Lagrange equations, a system of differential equations was obtained. Consideration of forced oscillations of a system with two degrees of freedom is greatly simplified when moving to the principal coordinates. The problem of the vertical dynamics of the rolling stock is simplified in the transition to the principal coordinates. The resulting differential equations of free and forced oscillations of the system in the principal coordinates are two independent second-order linear differential equations, which greatly simplifies their solution.
Modeling of a measurement analog channel of a hardware and software system for researching medical electrodes in Matlab
Authors: Andreev S A , Kim V L
Published: November 2019

There is an urgent need to improve system design of calibration equipment which allows us to determine parameters and characteristics of medical electrodes. Technical characteristics of a hardware and software system for researching medical electrodes are depending on amplitude–frequency responses of a measurement analog channel. This channel consists of an instrumentation amplifier, a cascaded chain of operational amplifiers including programmable-gain amplifiers and a low-pass filter, therefore calculating amplitude–frequency responses of a measurement channel is a multiparameter problem. This problem can be solved efficiently by simulation with help of Matlab. Simulink-model of a hardware and software system for researching medical electrodes is suggested. The model provides the correct design of a measurement channel. It is subject to design criteria such as accuracy of frequency band and a reduction in gain.
Automation of the process and mathematical processing of the results of annealing the hemispherical resonators
Authors: Dolapchi S M , Denisova O A
Published: November 2019

Isotropy of physical properties and strength of quartz glass makes it a good material for use as resonators in aircraft navigation systems, in complex optical systems and automation elements. To form a solid surface, it is necessary to create siloxane bonds, consisting of silicon - oxygen compounds forming the structural unit of quartz glass of the SiO4 tetrahedron. For this purpose, an automated resistance furnace operating under the control of a personal computer was developed, and for processing of the results of surface quality, a computer program «Method of lying drop» written in Delphi 7.0 was used. The results of twelve measurements for each temperature are as follows: annealing temperature, mean square deviation, mean square sampling error, the value of the wetting angle, confidence interval, confidence probability, student coefficient. The calculation results can be displayed on the screen or in an external file. The program interface is convenient and clear.
Synthesis of multi-phase zone rectifiers with coupled voltage systems
Authors: Myatezh S V , Ivanov V V , Rozhkova M V
Published: November 2019

The capabilities of simple positions of the structural synthesis method are demonstrated by the example of creating a two-zone three-phase rectifier by aggregating three single-phase rectifiers taken as a basis. The further improvement of the circuit solution in accordance with the provisions of this method allowed, through the creation of an additional electrical node, making the transition from an unbound three-phase voltage system, operating in a two-zone three-phase rectifier to a six-phase coupled voltage system. This was reflected оn the adjustment of the regulating characteristics of the rectifier and it improved a number of its indicators.
Measurer and recorder of electrical signals for electrical geophysical surveys
Authors: Zhmud V A , Tereshkin D O , Semibalamut V M , Dimitrov L V , Roth H
Published: November 2019

To conduct research by electrical prospecting, instruments for measuring and recording electric fields with unique characteristics are necessary. Such recorders should work with signals that vary over a very wide dynamic range, as well as over a wide frequency range. The acquisition of ready-made functionally complete recorders for these purposes is impossible due to the lack of such devices. These devices must work effectively both in standalone mode and in telemetry mode. High accuracy of data binding to absolute time is very important. A set of requirements for these devices requires the development and manufacture of recorders.
Patterns of recovery and injection wells in deposits of high-viscosity oil with reservoir decompression zones
Authors: Almukhametova E M , Kotenev Yu A , Sultanov Sh Kh , Safiullina A R
Published: November 2019

The issue of patterns of injection and recovery wells in zones of non-uniform permeability reservoirs is discussed by many researchers. The researchers aim to identify the influence of well patterns in reservoir zones with different permeability on the efficiency of oil recovery. This issue is particularly acute for systems maintaining reservoir pressure. The location of injection wells in low-permeable zones, and recovery wells - in high-permeability zones helps increase the coverage of the impact. Moreover, even in the conditions of a partially developed reservoir, transformation of the existing development system has significant potencies for increasing the ORC. One more crucial problem is the study of the effect of extensive highly permeable inclusions (faults, zones of reservoir loosening) on the effectiveness of regular development systems.
About necessity to regulate and automate processes in the quality management systems of the mechanical engineering branch
Authors: Kovalenko V V , Bobkov V N , Kovalenko V V
Published: November 2019

The article analyzes the effectiveness of the quality management systems that operate at a number of enterprises. The main problem in most cases is determined as weak usage of the process approach in business-process management. To eliminate this problem, the authors offere to apply a process approach in the quality management systems of engineering enterprises for the purpose of receiving actual processes. Based on these processes and modern software tools, regulatory documentation is generated with the subsequent transition to the implementation of executable processes or BPM-systems (Business Process Management System). The regulation of business processes provides employees with regulatory documentation, and application of executable processes eliminates the “human” factor in process management. In addition, it is possible to monitor performance indicators and use the Deming cycle to continuously improve product quality. The practical realization of the project has been done in the framework of the Russian business-modeling software “Business Studio” and “Elma”.
Compiler-compiler of multi syntax programming languages for creating N-version software
Authors: Kuznetsov A S , Tsarev R Y , Yamskikh T N , Knyazkov A N , Pupkov A N , Laleye F A A
Published: November 2019

Ensuring the reliability of the software has become increasingly complex and challenging. The most important problem is providing failure-free software operation to prevent financial losses or machinery breakdown. It can be solved with N-version programming which requires increased costs due to the use of redundant software components. In this paradigm, redundancy refers to diversity of software components. This paper discusses the implementation of software components in various languages with different syntax. We propose an efficient and time-reducing approach to the development of a multi-syntax programming language compiler. The technique of compiler parsing is based on the existing flex and bison specifications. The proposed approach makes it easier to detect errors in multi-syntax N-version software solutions, as well as reduce the likelihood of their occurrence due to the use of an automated tool, which is crucial for its implementation in an industrial setting.
Solving the problem of trucking optimization by automating the management process
Authors: Kukartsev V V , Tynchenko V S , Chzhan E A , Kukartsev V A , Boyko A A , Korneeva A A , Bukhtoyarov V V
Published: November 2019

This article discusses the solution to the optimization problem associated with trucking by automating the management process, namely the creation of software. The authors consider the main problem, because of which there is a need to automate processes. The introduction of software into the organization will help to maximize freight profit and fully automate the components that make up the process of transportation. Characteristics of the software and the depiction of interface are presented.
Assessment of the uncertainty factors in computer modelling of an agricultural company operation
Authors: Zaporozhtseva L A , Sabetova T V , Fedulova I Yu
Published: November 2019

The design of management decisions is one of the most difficult and most creative processes in all managerial work. It requires thorough understanding of the current situation and prospects of both the company and its environment. The article considers the problem of determination of the degree of influence of uncertainty factors on the performance of an agricultural company. After carrying out a schematic factor analysis of the financial results of the agricultural company, the authors selected parameters such as crop yields and average selling price, for analyzing the degree of exposure to uncertain factors. Since both the selected parameters are affected by a large number of certain factors and factors uncontrollable for the company’s management, the authors find it unacceptable to apply factor analysis to them. Instead, the suggestion is made concerning grouping all the factors on the basis of their certainty and definition of the influence degree for each group. As a result, the proposal was made for the projecting method, such as economic and mathematical modeling, to use the data from both the firm being the subject of modeling, and from the similar enterprises available from the regional Department of Agriculture. In this case, the accuracy of the forecast will be much higher, besides, it can be developed in 3 or 5 probability scenarios.
Estimation of the change in the gas flow rate from the surface of a tungsten plate under pulsed heat load
Authors: Lazareva G G , Arakcheev A S , Popov V A , Maksimova A G
Published: November 2019

The work is devoted to the numerical implementation of the tungsten evaporation process model. The tungsten evaporation model is based on solving the two-phase Stefan problem for temperature in the sample area and gas dynamics equations over the sample. The calculation results for parameters corresponding to those used on the BETA facility at BINP SB RAS show that it is possible to use the boundary homogeneous conditions of the Neumann for the velocity when setting the gas density on the plate surface.
The grid codes generation for solving problems of the cosmic plasma hydrodynamics on supercomputers
Authors: Sapetina Anna , Ulyanichev Ivan , Glinskiy Boris
Published: November 2019

In this paper an attempt is made to create a system for generating the parallel codes to simulate some astrophysical phenomena on modern computing architectures. A code construction scheme for the numerical solution of various problems of the cosmic plasma hydrodynamics is proposed using a knowledge base with an ontological representation of a given mathematical simulation area. The ontology of numerical methods and parallel algorithms and the ontology of parallel architectures and technologies together with the expert (inference) rules allow selecting an efficient numerical method, a parallel algorithm and a computational architecture for solving a necessary problem from the outlined domain. The corresponding program units that implement various stages of solving the problem on a chosen computational architecture are substituted into scheme of solving the problem constructed in this way. Program units can be based on both the author’s implementation and on calling various parallel libraries.
Gas-monodisperse dust mixtures in smoothed particle hydrodynamics: computing of stiff non-linear drag
Authors: Stoyanovskaya O P , Glushko T A , Okladnikov F A , Snytnikov V N , Snytnikov N V
Published: November 2019

Simulation the dynamics of gas-solid mixtures is crucial in many applications: chemical reactor design, evolution of circumstellar discs, etc. Such mixtures where gas is a carrier phase and solid grains are dispersed phase can be simulated as interpenetrating continuum media. The characteristic parameter of this problem is relaxation time between gas and dust velocities. In many applications this parameter varies significantly during the simulation (from small to unity). Moreover, the drag force can be non-linearly dependent on solids to gas relative velocity. These factors place high requirements on the numerical methods for such problems. We propose a novel non-iterative algorithm for Smoothed Particle Hydrodynamics for computing gas-solid mixtures with exchange momentum between phases. Forces (except drag force) are approximated explicitly, while drag force is linearized and velocity relaxation time is approximated explicitly while relative velocity is approximated implicitly. The algorithm was tested on dynamical problems for dusty gas mixtures. It was shown that in the developed algorithm for stiff nonlinear drag we can use temporal and spatial resolution independent of drag parameters.
The cuFFT code for N-body simulation
Authors: Prigarin Vladimir , Karavaev Dmitry , Protasov Viktor
Published: November 2019

The complexity of astrophysical processes lies in the joint consideration of components of various nature. For example, in the collision problem of galaxies, the three-dimensional dynamics of an interstellar gas and a stellar component is considered. The modeling of these components can be based on completely different classes of numerical methods. One possible solution to this problem is to use the Eulerian-Lagrangian approach, in which physical quantities are concentrated at material points, which is typical for the SPH (Smoothed Particle Hydrodynamics) method, and the forces are calculated on an adaptive grid attached to a system of material points. This approach uniformly takes into account both the dynamics of a continuous medium and discrete particles, and also eliminates a number of drawbacks inherent in the original method. The calculation of gravitational interaction is carried out by solving the Poisson equation for the gravitational potential. In this case, all particles are projected onto the computational grid and the potential values in each cell are already calculated on it. The solution of the Poisson equation for the gravitational potential is performed using the fast Fourier transform. The article describes the new cuFFT code Virtual Planetarium for modeling astrophysical objects based on the SPH method, supplemented by the Godunov method for calculating pressure and momentum flows between particles, and the fast Fourier transform method for solving the Poisson equation for the gravitational potential. The paper describes the rationale for the transition to such a computational model, kinetic and hydrodynamic approaches are described in detail. Simulation of the collapse of an isothermal gas cloud is performed. Method to reproduce the evolution of instabilities in form of two density arms is realized.
District-scale energy demand modeling and urban microclimate: A case study in The Netherlands
Authors: Mosteiro-Romero Martin , Maiullari Daniela , Collins Fiona , Schlueter Arno , Timmeren Arjan Van
Published: November 2019

District-scale energy demand models are powerful tools to understand complex urban areas, however these models generally use average weather data from rural locations, thus overlooking the effects of the urban context on the local climate. In order to analyze the effects of urban microclimate on space cooling demand, this paper uses microclimate simulation results from ENVI-met as inputs to a district-scale energy demand model, the City Energy Analyst (CEA), to assess the performance of a proposed masterplan for a new residential district in Almere, the Netherlands.
Modeling of mesoscale phenomena using WRF-BEP-BEM-CIM in a complex region
Authors: Labedens Sylvain , Scartezzini Jean-Louis , Mauree Dasaraden
Published: November 2019

Because of the global warming, urban planning strategies must be investigated to reduce building energy consumption and increase thermal comfort in urban areas. It is thus proposed in this study to use a mesoscale meteorological model to study the impact of multiple urban planning scenarios in the Canton of Vaud. The Weather Research and Forecast (WRF) model is used to conduct simulations. The urban parameterizations, Building Effect Parameterization + Building Energy Model + Canopy Interface Model (BEP-BEM-CIM), developed in previous studies are already integrated in the WRF model. We demonstrate that the models perform well in plateaued regions (<10% difference) but some important deviations (20%-30% difference) are noted in particularly complex regions with complex topography. Two possible improvements will be addressed in the future: there is a need to improve the topography representation in the model itself and other scenarios including the impact of future climate will also be assessed.
Urban climate scenario data for European cities
Authors: Remund Jan , Grossenbacher Urs
Published: November 2019

Climate change and the urban heat effect are expected to have a large influence on the energy consumption and thermal comfort of buildings. However, using meteorological data which incorporates effects of climate change and characteristics of cities is not currently a standard practice in building simulation. By default, data of nearby meteorological stations often outside cities are used. This may lead to important discrepancies between simulation results and actual energy consumption and/or indoor climate data for buildings in urban areas. These effects are analysed within building energy part of H2020 climate-fit.city project. First, adapted urban and future meteorological data modelled using the UrbClim model and standard meteorological data were compared. Second, these data were included within the Meteonorm software (version 7.3.2). This was carried out for current climates as well as for future scenarios (RCP 4.5 and 8.5, 2050) for the cities of Barcelona, Bern, Berlin, Bremen, Prague, Rome and Vienna. Like this Meteonorm includes a combination of urban and future climates accessible in a user friendly tool.

In a third step the urbanized TMY data sets generated by Meteonorm were used to simulate energy consumption, peak loads and indoor climate conditions with models of several typical buildings. In this comparison we show a simulation for a multi-family house for current and future climates. The whole-year simulation runs were compared to the reference scenario – the standard TMY (available in Bern and Vienna).

For current climates heating energy consumption is 10-25% lower within cities and cooling energy up to 60% higher (Barcelona). Even bigger changes are seen for future climates: Heating loads drop by up to 30% and cooling loads rise more than 100% (they are 2-3 times higher than heating loads in Barcelona by 2050).
Correlational study on thermal comfort and outdoor activities
Authors: Peng Zhikai , Wang Yi , Li Lisha
Published: November 2019

This research has investigated several correlation patterns between spatial behaviour and outdoor thermal comfort for urban spaces. An eight-hour field work of behavioural snapshots has been carried out at Market square, Cambridge, on a sunny day of May. The universal thermal climatic index (UTCI) was acquired from microclimate simulation in ladybug. The thermal-comfort zones were coupled with four featured behaviours: sitting, standing, strolling and walking. The results have shown a tendency toward occupying shady spaces in general. The canvas awnings have proved the correlation between comfort and behaviour. More interestingly, less comfortable areas appear to be acceptable for more than half of the observed groups with a 4°C increase in UTCI.
Aikido: Structuring data point identifiers of technical building equipment by machine learning
Authors: Stinner Florian , Neißer-Deiters Paul , Baranski Marc , Müller Dirk
Published: November 2019

Building automation and control systems (BACS) generate large amounts of data. Manual interpretation of the data, e.g. for identifying energy efficiency measures, is in many cases either too costly or too complex. In order to reduce the manual effort of building data analysis, it is necessary that the labeling of data points is human- and machine-readable. As there is currently no widely accepted standard for labeling, these labeling texts differ greatly. We developed an algorithm based on Natural Language Processing (NLP) that automates the translation of BACS metadata. In previous works, we developed a schema based on 40 other schemas for the designation of data points (BUDO Schema) that we use for the translation. The user labels data points suggested by our algorithm Aikido and checks the prediction in a browser-based GUI (key interface). In our case study, we use a dataset that comprises five different projects, each using its own schema for structuring the metadata of data points in BACS. After ten training labels, our algorithm achieved an accuracy of 0.87 across all data sets. This increased to 0.95 with 50 training labels. We show that the chosen approach is able to normalize the metadata of different schemas to transfer to a previously defined schema. Thus, the manual effort is decreased significantly.