bluuebunny/crossref_metadata_2025 huggingface dataset:
Dynamic calculation of nonlinear oscillations of viscoelastic orthotropic plate with a concentrated mass
Authors: Khodzhaev Dadakhan
Published: April 2019

Plates, panels and shells made of composite material with fixed objects in the form of an additional mass have found a wide use due to their viscoelastic and strength properties. An analysis of their dynamic behavior indicates a significant effect of inhomogeneity of an associated mass type on their strength. The problem of oscillations of a viscoelastic orthotropic rectangular plate with an associated mass is considered according to the Kirchhoff-Love hypothesis in a geometrically nonlinear statement. This problem is reduced to solving the systems of nonlinear integro-differential equations with singular relaxation kernels, solved by the Bubnov-Galerkin method in combination with a numerical method based on the use of quadrature formulas. The numerical values of the approximate solution have been calculated in the Delphi programming environment. At wide range of changes in physicomechanical and geometrical parameters, the behavior of the plate has been studied. The effect of viscoelastic and inhomogeneous material properties, concentrated mass and their location on the oscillatory process of a rectangular plate is shown.
Evaluation of thermal properties of insulation systems in pitched roofs
Authors: Zhukov Alexey , Ter-Zakaryan Armen , Bobrova Ekaterina , Bessonov Igor , Medvedev Andrey , Mukhametzyanov Vitaly , Poserenin Alexey
Published: April 2019

The article outlines the basic requirements for pitched roof insulation systems. The analysis of the properties of thermal insulation materials used in insulation systems was conducted. It is substantiated that the thermal resistance of such structures on the surface of the roof is formed taking into account the thermal conductivity of thermal insulation, thermal conductivity of wooden rafters and heat loss through the leakiness of joints and mounting devices. An assessment was made of the effect of loads of various types on the heat-insulating layer, namely: the effect of the air flow in the ventilated gap; the movement of the vapor-air mixture in the material; condensation of water vapor and penetration of drip liquid; exfiltration of air at the joints of the plates and on the surfaces of contact with the supporting structures. The expediency of using products on the basis of unstitched polyethylene foam in the construction of pitched roofs with a wooden roof system, taking into account the advantages and features of this material, as well as taking into account the possibility of creating a seamless insulating shell, is substantiated.
The diamond cutting technology in hydrotechnical concrete structures
Authors: Subbotin Artem , Morev Daniil
Published: April 2019

The possibility of improving the performance of diamond cutting under water is a relevant research not only for the construction industry, but also in the field of environmental protection and the environmental situation in the area of hydraulic structures. The objects of the study are hydraulic structures, namely reinforced concrete and concrete structural elements in contact with water. The objectives of the study are to analyse the methods of diamond cutting and drilling of structures, compare Russian and international experience in the production of these types of work, assess the environmental impact of cutting and drilling structures in water, and offer an effective organizational form for managing and systematizing diamond operators cutting. The basis of the research methodology is the study of the works of domestic and foreign authors in the field of organization of construction and installation works, their technology and mechanization. During the work on the topic, the authors reviewed and compiled the experience of international and Russian results of theoretical and applied research in the development and improvement of the organization theory and technology for the reconstruction of concrete and reinforced concrete structures of buildings and structures that made a huge contribution to the development of diamond cutting technologies.
Creation of the united digital model of energy engineering complex
Authors: Dmitriev Alexey , Gerasimov Vyacheslav
Published: April 2019

In the framework of the priority direction of the transformation of the Russian Federation domestic economy to digital format, the field of designing can become a key platform for the start of processes of digital transformation. The decisions laid down at this stage became the foundation for new objects. Not only the reliability and safety of the object operating, but also its modernity, competitiveness, economy, energy efficiency, and the ability to integrate into a developing digital community - all of it depends on the organization of the next steps in the construction and commissioning of the object, and also depends on the quality of a project engineering and quality of decisions made at this stage.
Impacts of waste water from main factories on water quality of Tolich river, Hanoi
Authors: Dinh Dap Nguyen
Published: April 2019

Waste water from industrial sites amount to one third of total waste water discharged into Tolich river and may have serious effects on the river water quality. With the total amount of waste water of factories (Hanoi beer alcohol and beverage joint stock corporation - HABECO, Trang An JSC and Thuong Dinh industrial park) of 45000 m3/day, these factories account for more than a half of total industrial waste water released into Tolich river. The analytic results of waste water from the main factories (HABECO, Trang An JSC, Thuong Dinh industrial park, Hanoi Soap JSC, Sao Vang Rubber JSC, Tool No.1 JSC) show that the parameters of TSS, BOD5, COD, total of nitrogen, total of phosphorus are higher than the Vietnamese standards for industrial waste water QCVN 24:2009/MONRE, column B, because the factory has an effective wastewater treatment system. The heavy metals parameters of waste water from all factories without treatment: HABECO releases 1974 tons of BOD, 766 tons of TSS, 8,4 tons of phosphorus and 52,5 tons of nitrogen annually; Trang An JSC releases 64,8 tons of BOD, 48,6 tons of TSS, 0,6 tons of phosphorus, 1,6 ton of nitrogen and 25 tons of oil and grease; HASO releases 30 tons of BOD, 33 tons of TSS and 5 tons of oil and grease. Thus, if the waste water is not treated, it can lead to a very seriously pollution of Tolich river.
Video-ecological coefficient of real estate objects
Authors: Tsvetkov Oleg , Simankina Tatiana , Karmokova Kristina
Published: April 2019

The paper presents the data obtained within the analysis of vid-eo-ecological factors formed in the territory of the typical building estate “Druzhba” in the city of Komsomolsk-on-Amur, Russia. The present work considers the issues of interrelations between the visual environment and the state of human work efficiency. Taking into account the influence of video-ecological factors, the authors attempted to forecast changes in the value of real estate objects and a consequent change in the cadastral value of these objects. Conclusions about the possibility of taking into account video-ecological factors for the cadastral assessment of the object were made. The authors also noted that investing in the development of the external appearance of the territories belonging to the group having a high video-ecological coefficient could increase their value and attractiveness.
Environmental monitoring and urban phytodesign in ensuring the radioecological safety of urban buildings
Authors: Gorodnichaya Alena , Melchenko Alexandr
Published: April 2019

The purpose of this paper is to study the migration and accumulation of 90Sr in vegetative and generative organs of plants: golden currant (Ribes aureum) and cherry plum (Prunus cerasifera Ehrh). Research objectives: 1) 90SrCl2 is artificially deposited on the soil, precipitation imitation (field experiments); 2) planting plants: Prunus cerasifera Ehrh and Ribes aureum to the soil artificially contaminated with 90SrCl2; 3) cultivation and monitoring of the studied plants in the soil artificially contaminated with 90SrCl2. The contamination level of the experimental area was 500 MBq/m2. The possibilities of tree and shrub plant forms (Prunus cerasifera Ehrh; Ribes aureum) to accumulate 90Sr in their vegetative and generative organs were studied. The activity of the beta-emitting radionuclide in the counting samples was measured using the “Progress” software on the Multi-purpose spectrometric complex “Gamma Plus” device (beta path). As a result of research, the accumulation of radionuclides in both studied plants was found. In 2016, the difference in the content of 90Sr between cherry plum and golden currant in bark, wood, leaves, and fruits was 1.6, 1.5, 1.8, and 2.0 times, respectively. Experimental data can be used in the environmental monitoring of the radiation situation in urban areas of the territories allocated for the construction of public, residential buildings and structures, to be the basis for further advanced research in the designated area.
Formation and development of clusters in the Russian regional agro-industrial complex
Authors: Sharnin Anatoly , Frolova Olga , Klychova Guzaliya , Nigmatullina Nuriya , Iskhakov Albert
Published: April 2019

The article considers the cluster approach as an innovative technology for managing the regional economy of Russia. The results of the Russian and foreign scientists research in the cluster formation theory and practice are presented. The strategic model for innovative dairy cluster as a special form of relationships has been developed based on these scientific provisions. The basic principle is the innovative component of processing organizations of the regional dairy sub-complex together with consideration of socio-economic peculiarities of the Nizhny Novgorod region. This model turns to be very effective and can be used in designing the agro-industrial sector of the country’s economy at the regional level.
The spheroplastics destruction mechanisms under hydrostatic compression
Authors: Turusov Robert , Solodilov Vitaliy , Kireynov Alexsey , Korokhin Roman , Kuperman Alexander
Published: April 2019

This paper is devoted to hydrostatic compression testing of glass microspheres and spheroplastics (syntactic foam) based on them. Despite a significant share of the void, for example, with a volume fraction of glass microspheres in the syntactic foam of 0.5, the share of the void will be equal to 0.447. The opposition to hydrostatic compression of this material is surprising.The authors consider that the whole point here is to determine the signs and criteria of destruction of these materials. That is why tests were conducted to determine the strength of spheroplastics and a set of glass microspheres with modeling in the composition of an aqueous emulsion.
Use of operating processes charts in procurement management in a construction company
Authors: Minnullin Ruslan , Minnullina Anna , Kosyakova Inessa
Published: April 2019

The paper proposes a method for compiling an operating processes chart for procurement management based on the well-known distribution matrix of administrative management tasks. To confirm the practical applicability of this tool, it was tested at a major road-building company, OAO TODEP. The compiled chart for the company’s procurement activities is clearly presented in this paper with an assessment of the labor intensity for each task of the procurement process and the workload of the persons in charge.
The algorithms for the environmental finance based on adjusted present value models
Authors: Pirogova Oksana , Gorin Evgeny , Plotnikov Vladimir
Published: April 2019

The article discusses the direction of modification of methods for calculating the optimal capital structure based on compromise theories and, in particular, the method of adjusted cost, which involves taking into account the benefits and costs of debt financing. The tools presented in the article can be used in the practice of environmental financing. The algorithm for calculating the value of the enterprise based on free cash flow is considered, which allows choosing the capital structure from the condition of maximizing the value of the enterprise. The considered theoretical models do not give a complete picture of how to take into account the effect of the tax shield and the possible costs of financial difficulties in making practical decisions related to capital structure. Alternative approaches to the calculation of individual elements and parameters of the method, such as the probability of bankruptcy, are offered. In particular, it was offered to consider logistic regression models for assessing the risk of bankruptcy, as well as to modify the methodology for calculating bankruptcy risk based on a credit rating, taking into account the dependence of the cost of borrowed capital on the level of financial leverage in the enterprise. Further, it is recommended to use a weighted average for the probability of risk of bankruptcy, as well as to carry out adjustment of the value of bankruptcy costs, taking into account the weighted average of the assessment.
The formation of engine parks of the construction organizations with accounting of energy efficiency and environmental friendliness
Authors: Prochorov Sergey
Published: April 2019

Increase in energy efficiency of construction allows reducing costs of technical operation of parks of the equipment and increasing construction energy saving level in general. To achieve these goals, it is offered to apply modern methods of the organization and works, to use the hi-tech construction equipment, and also to form an optimum set of mechanization for construction and installation works. A criterion of optimization is the cost of work. In definition of performance data of the car at the enterprise, its energy efficiency is taken into account, the options are compared, and the optimal set of cars is formed. During the solution of the task, conclusions were formulated, showing that ecological planning and steering together with energy audit on the construction site allow more rational formation of parks of cars, improving ecological component and quality of construction works.
Reconstruction and modernization of industrial parks
Authors: Graboviy Petr
Published: April 2019

The construction of the industrial park is organized in accordance with the program management method, which identifies independent startup industrial and construction complexes that determine the order in which preparatory and basic works are carried out, the calendar construction timeframe and the sequence for entering construction queues taking into account the timely supply of equipment and structures, regulatory requirements for material and labor resources, as well as means of mechanization. In the organizational form of reproduction, carried out during the reconstruction of the industrial real estate of the park, surveys are conducted on the technical condition of the structures, intrasurface and intrasite vehicles and communications, equipment and engineering networks, production conditions and construction and installation works. The article presents an example of assessing economic efficiency of the business plan for organizing the construction of an oil pipeline, which is part of an industrial (industrial) park, in the section from 1569 to 1978 km in the Mari Republic and the southern part of Kirov Oblast, with natural borders from r. Vyatka to r. Vetluga diameter of the pipeline is 1020 mm.
System of expected indicators of green growth and green economy
Authors: Shevchuk Anatoly , Prorokov Andrey
Published: April 2019

The works, performed for the last three years at the request of various ministries and departments for decision-making on transition of the Russian Federation to green economy, are considered and critically analysed in the article. The purpose is to formulate the main approaches to the measurement of green economy, the concept of transition, measures for realization, etc. The results, received by the authors of this research, were used within the preparation of the meeting of the State Council, held on December, 27, 2016, and they can become the basis for the development of the scientifically proved Concept of transition of the Russian Federation to green economy and for the preparation of “Methodological recommendations on the inclusion of an ecological component in investment projects of regions in Russia”. The research was carried out on the basis of the Russian practice. However the research materials can be used both by domestic and foreign experts, who are engaged in studying green economy, green growth, green technologies, sustainable development, greening of economy, and for the heads, who are responsible for the economy development.
Business process reengineering for the increase in the environmental friendliness of construction
Authors: Shchepkina Natalia , Kramchaninova Maiya
Published: April 2019

Some current trends and prospects of the world construction industry development from environmental economics position are presented in article. The increased role of innovations and their influence on the competitiveness of construction company in the context of economic, social and ecological components is analyzed. Reduction of some negative impact of all the types of technological processes of construction on the environment is connected with the growth of innovative opportunities. This research proves the need of overcoming technical and technological lag for the development of the construction industry by the means of introduction of business processes management instruments. Justification of reengineering as an effective way of transformation of the technology of construction production is made. The algorithm of stage-by-stage reengineering of business processes, offered in the article is the instrument of effective introduction of technological innovations in the construction companies according to current ecological requirements.
Development of a mechanism for assessing the economic sustainability of small enterprises
Authors: Golov Roman , Alkhimovich Igor , Kazarnovskij Valerij , Ermolaeva Elena
Published: April 2019

The relevance of this study is due to the lack of a scientifically developed concept of the formation of sustainability indicators for small enterprises operating in the environmental field. The purpose of the study is to develop a mechanism for the economic sustainability of environmental organizations, which is based on competition, centralization of management, and business activities. In addition, the paper analyzed the modern theory and practice of managing production structures, studied the main factors affecting the system of indicators of the organization’s sustainability. A methodology that allows for diagnostics and assessment of the sustainability of an enterprise is proposed. The financial mechanisms that ensure the process of financing environmental activities are studied.
Issues of transport security and human factor
Authors: Lez’er Victoria , Muratova Irina , Korpusova Natalia
Published: April 2019

The article discusses the concept of human factor. The authors have studied the problem of transport security that depends on the socio-psychological component of the staff. The reasons for the significant influence of the human factor in the field of motor transport are identified, as well as the ways of formation of individual indicators in the structure of the emotional stability of the driver or conductor. The textual and graphical materials of the reports on the formation of a safety culture in transport organizations, as well as informational tables on the results of staff surveys, served as an empirical base. The study was made in support of the methods of cognitive modeling, questionnaires, application of the SHELL model, which reveals the main elements of the human factor and the relationship between them. Empirical Base - Tyumen Passenger Transport Organizations - DEP Tyumenavtotrans, individual entrepreneur Evrobus 72, IntelInvest LLC.
Management of the innovative ecosystem development environment
Authors: Kolomytseva Olga , Gunina Inna , Kolesnikova Elena , Agafonova Vera
Published: April 2019

One of the key factors of innovative development is the availability of a favorable innovative environment ensuring the transformation of ideas and developments into market products, introduction of these products into most important branches of economics and social sphere, as well as allowing saving the unique set of scientific and engineering schools. But the key problem for implementation of effective innovations is the absence of favorable environment and innovative climate promoting creation of innovations, ensuring the growth of global competitive ability, labor productivity, and life quality of population. Thus, the formation and development of the innovative environment as the most important condition for implementation of effective innovations represents the actual scientific task of significant national economic importance. Digital technologies are best developed in a harmonious ecosystem. Nowadays, ecosystem-based projects are becoming more popular, when a community of people connected by common interests is formed; the economy is very rapidly migrating into the history of ecosystems. In the next 10 years, we should expect the competition of ecosystems, digital platforms integrated between each other: in the upcoming global digital economy, that economic contour will win, which will be the fastest growing in the number and quality of digital platforms integrated into a single ecosystem. That is, the digital economy should be seen as an ecosystem economy.
Efficient technology of human resources management in the field of transport
Authors: Lez’er Victoria , Muratova Irina , Grigorev Alexander , Kopytova Anna
Published: April 2019

The authors of the article strive to give an analysis of the main aspects of human resource management technology in the practice of transport companies, to identify the problematic issues of their development and to find solutions. The article discusses the criteria for effective human resource management, analyzes the conditions for monitoring the quality of human resource use in a transport company, describes the characteristics of grading as an effective management technology for the motivational component of the personnel in the transport sector. As an experimental base of research, the authors used monitoring the quality of human resources in transport companies of the city of Tyumen - Evrobus 72, IntelInvest, ComfortAuto Tyumen, as well as textual and graphical materials of reports.
Overview of ALICE results on ultra-peripheral collisions
Authors: Kryshen Evgeny
Published: April 2019

Lead nuclei, accelerated at the LHC, are sources of strong electromagnetic fields which can be used to measure photon-induced interactions in a new kinematic regime. These interactions can be studied in ultra-peripheral p–Pb and Pb–Pb collisions where impact parameters are larger than the sum of nuclear radii and hadronic interactions are strongly suppressed. Heavy quarkonium photoproduction is of particular interest since it is sensitive to gluon distributions in target hadrons. An overview of ALICE results on vector meson photoproduction in ultra-peripheral Pb–Pb and p–Pb collisions will be presented. Implications to study gluon density distributions and nuclear gluon shadowing will be discussed.
Some proposed fixed target experiments with the LHC beams
Authors: Topilskaya Nataliya , Kurepin Alexey
Published: April 2019

The physics opportunities offered by using the multi-TeV LHC beams for a fixed target experiment have been widely discussed in recent years. This mode is convenient to investigate rare processes of particle production and polarization phenomena because the expected luminosity exceeds the luminosity of the collider. The main physical goals of these experiments are: i) investigations of the large-xgluon, antiquark and heavy quark content in the nucleon and nucleus; ii) investigations of the dynamics and spin of quarks and gluons inside nucleus; iii) studies of the ion-ion collisions between SPS and RHIC energies towards large rapidities. With the LHC lead beam energy scan on a fixed target it would be possible to investigate the energy range up to 72 GeV to search for the critical point for the phase transition to the Quark Gluon Plasma (QGP).
1S-2S energy shift in muonic hydrogen
Authors: Faustov R. N. , Krutov A. A. , Martynenko A. P. , Martynenko F. A. , Sukhorukova O. S.
Published: April 2019

We calculate corrections of orders α4, α5, α6 to the (1S – 2S) fine structure interval in muonic hydrogen (μp), muonic tritium (μt) and muonic helium ion $$((\mu _2^3He) + )$$. They are determined by the effects of vacuum polarization, nuclear structure and recoil and relativistic corrections. The nuclear structure effects are taken into account in terms of the charge radii of the nuclei in one-photon interaction and in terms of electromagnetic form-factors in the case of two-photon interaction. The obtained results for the (1S – 2S) splitting can be used for a comparison with future experimental data.
Half masses of particles produced in π–C interactions at 40 GeV/c and phase transition
Authors: Sovd M. , Baatar Ts. , Malakhov A.I. , Otgongerel B. , Tulgaa T. , Sharkhuu G.
Published: April 2019

In this paper, we present the experimental analysis of the parameter T (temperature) as a function of the cumulative number nc of π– - mesons, K0 - mesons and protons produced in π– C interactions at 40 GeV/c. On the basis of this analysis, we determined a dependence between the half mass of the particle (mi/2) and the target mass value (mc = mpnc), which is required from the target for the production of the particle. We suggest that the dependence between the two masses mentioned above may be related to the beginning of the mixed phase with constant temperature.
Determination of geometry of heavy ion collisions with forward hadron calorimeter (FHCal) at MPD/NICA
Authors: Ivashkin Alexander , Finogeev Dmitry , Golubeva Marina , Guber Fedor , Izvestnyy Alexander , Morozov Sergey , Strizhak Alexander
Published: April 2019

The main purpose of the FHCal is to provide an experimental measurement of a heavy-ion collision centrality (impact parameter) and orientation of its reaction plane. FHCal consists of two identical arms placed at the left/right sides from the beam collision point. Due to the fine modular structure and detection of spectators in both forward/backward regions, the angular resolution of the reaction plane reconstruction is below 30 degrees. Since the heavy fragments escape into beam holes, it is not possible to distinguish the central and peripheral collisions using only the deposited energies in FHCal. The subdivision of the calorimeter into two, inner and outer parts, and the calculation of the energy depositions separately in these calorimeter parts allow one to construct a new observable, the energy asymmetry. Taking the two-dimensional correlation between the energy asymmetry and full energy deposition in the calorimeter, it would be possible to resolve the ambiguity in the centrality determination.
MCORD - MPD Cosmic Ray Detector a new features
Authors: Bielewicz M. , Milewicz-Zalewska M. , Grodzicka-Kobylka M. , Mianowski S. , Sibczynski P. , Swiderski L. , Szczesniak T. , Linczuk M. , Wielanek D. , Kisiel A. , Kasprowicz G. , Pozniak K. , Zabołotny W. , Romaniuk R. , Chłopik A. , Bancer A. , Grodzicki K. , Pietrzak M. , Dudziński A. , Jaworska E. , Strugalska-Gola E. , Peryt M. J. , Rybczynski M. , Wlodarczyk Z. , Stefanek G. , Kankiewicz P.
Published: April 2019

The main detector system at the Nuclotron-based Ion Collider fAcility (NICA) located in Dubna, Russia is the Multi-Purpose Detector (MPD). For better calibration reason, the MPD needs an additional trigger system for an off-beam calibration of MPD sub-detectors and for rejection (veto) of cosmic muons. The system should also be useful for practical astrophysics observations of cosmic showers. The consortium NICA-PL group defines goals and basic assumptions for the MPD Cosmic Ray Detector (MCORD). This article describes the conceptual design and simulation plans of the MCORD detector based on plastic scintillators with SiPM photodetectors and electronic digital system based on the MicroTCA crate.
η-nuclei in the SCAN experiment
Authors: Michaličková Katarína , Afanasiev S.V. , Dryablov D.K. , Vokál S.
Published: April 2019

η-mesic nucleus or the quasibound nuclear state of an η-meson in a nucleus is caused by the strong-interaction force alone. The project SCAN2 is aimed at searching and studying the η-meson nuclei production. The experiment is based on two-arms spectrometer using internal target at the Nuclotron. The setup was designed to study products from η-meson nucleus decay in the reaction d + 12C → (A)η + X → π + p + (A – 2) at deuteron energies from 0:5 to 2:5 GeV/nucl. The energy spectrum of secondary protons has been measured. The dependence of the yields of protons and pions on the beam energy has been obtained. This dependence can show us the minimum energy for the S 11 resonance formation. The first prototype of the neutron detector, which will be used in a new modified experimental setup SCAN3 for recording of neutrons from η-nucleus decays in the πn and pn channels, has been tested. The time-offlight method to obtain the neutron spectrum was used. The time resolution and efficiency of the neutron detector have been obtained.
Study of the deuteron analyzing powers in dp elastic scattering at the energy of 800 MeV
Authors: Mezhenska O. , Averyanov A.V. , Chernykh E.V. , Enache D. , Gurchin Yu.V. , Isupov A.Yu. , Janek M. , Karachuk J.-T. , Khrenov A.N. , Krivenkov D.O. , Kurilkin P.K. , Ladygin V.P. , Ladygina N.B. , Livanov A.N. , Piyadin S.M. , Reznikov S.G. , Skhomenko Ya.T. , Terekhin A.A. , Tishevsky A.V. , Uesaka T. , Urban J.
Published: April 2019

Preliminary results on the angular distributions of the vector Ay and tensor Ayy, Axx analyzing powers in dp elastic scattering at the energy of 800 MeV are presented. The measurements have been performed on Internal Target Station of the JINR Nuclotron using polarized deuteron beam from new source of polarized ions. The experimental data are compared with the preliminary calculations obtained within framework of relativistic multiple scattering approach.
Designing Control System of Hypersonic Vehicle with Dynamic Pressure Constraints Considered
Authors: Xu Hongyang , Fan Yonghua , Tong Xi , Yan Jie
Published: April 2019

An airbreathing hypersonic vehicle(AHV) generally adopts a scramjet engine as its propulsion, which needs strict conditions of flight dynamic pressure. A new dynamic pressure control system is presented, in which the AHV autopilot directly uses dynamic pressure to track the dynamic pressure command. Firstly, the dynamic pressure model of the AHV is established and the state equations of dynamic pressure control are given. Then, the dynamic pressure control system is implemented using the LQR optimal control theory. The dynamic pressure error is augmented in order to add an integral control to track the dynamic pressure with zero steady error. The structure of the dynamic pressure control system is also obtained. The simulation results show that the dynamic pressure control system has a good performance for guaranteeing the dynamic pressure of the scramjet engine with the disturbance of drag and thrust considered.
Multi-Objective Optimization of Processing Parameters for Disc-Mill Cutter Machining Blisk-Tunnel Based on GRA-RBF-FA Method
Authors: Zhang Nan , Shi Yaoyao , Yang Chen , Chen Zhen , Liu Jiang
Published: April 2019

The process of disc-mill cutter machining blisk-tunnel is a typical multi-input and multi-output system, therefore multi-objective optimization is applied to improve the process. In this paper, an integrated approach that Grey Relational Analysis(GRA)couples with Radial Basis Function (RBF) neural network and Firefly algorithm (FA) is used to solve the optimization problem. The aim is to satisfy the minimum cutting force and maximum material removal rate simultaneously by optimizing the cutting speed, feed rate per tooth and cutting height. The results for verifying experiment indicated that GRA-RBF-FA method can be applied to optimize the processing parameters of disc-mill cutter machining TC17 blisk-tunnel and the optimization results are superior to the GRA's.
Numerical Simulation on Aerodynamics of Multi-Element Airfoil with Drooped Spoiler in Ground Effect
Authors: Liu Jiang , Bai Junqiang , Gao Guozhu , Chang Min , Liu Nan
Published: April 2019

By using the finite volume method and k-ω SST turbulence model to solve the Reynolds Average Navier-Stokes equation and using the slipping wall to simulate the relative movement of the ground, the ground effect on the aerodynamic characteristic of multi-element airfoil with drooped spoiler is investigated numerically, and the reason why the lift coefficient decreased in ground effect is analyzed. The results indicate that, with the reduction in ride height, the lift and the drag decrease and the lift-drag ratio increases for the multi-element airfoil; the amplitude of the reduction in the lift coefficient increases with the reduction in ride height and the increase in the angle of attack, the maximum of lift coefficient can be reduced by about 22%; with the effect of ground, the losses of suction at upper surface make the lift decrease, the increases of pressure at lower surface make the lift increase, the variation of the lift coefficient for the main wing caused by the former is more than three times that of the latter. Analyzing the reason why the lift coefficient decreases showed that:on the one hand, ground effect on the lift coefficient for clean airfoil is changed with the range of angle of attack. For the low-to-moderate angle of attack, the lift coefficient increases; for the high angle of attack, the lift coefficient decreases. But multi-element airfoil works in the takeoff and landing stage for the high angle of attack, which causes the reduction of the lift coefficient in ground effect. On the other hand, the increase of the lift coefficient caused by the deflection of spoiler decreases with the reduction in ride height and the maximum reduction can be about 50%, which illustrates that ground effect makes interaction of the front and back section for the multi-element airfoil weak, resulting in further decreasing the coefficient for the multi-element airfoil.
Online semi-supervised multi-person tracking with gaussian process regression
Authors: Zhang Baobing , Huang Zhengwen , Rahi Babak H. , Wang Qicong , Li Maozhen
Published: April 2019

Most existing multi-person tracking approaches are affected by lighting condition, pedestrian pose change abruptly, scale changes, realtime processing to name a few, resulting in detection error, drift and other issues. To cope with this challenge, we propose an enhanced multi-person framework by introducing a new observation model, which adaptively updates fully online to avoid the loss of sample diversity and learning in a semi-supervised manner. We fuse prior information for tracking decision, meanwhile extracted knowledge from current frame is used to assist to make tracking decision, which can be viewed as a transfer learning strategy, and both aspects can ameliorate the tendency to drift. The new approach does not need any calibration or batch processing. Experimental results show that the approach yields comparable or better performance in comparison with the state-of-the-arts, which do calibration or batch processing.
Payload dropping control of an unmanned quadrotor helicopter based on backstepping controller
Authors: Qiao Jing , Liu Zhixiang , Zhang Youmin
Published: April 2019

Quadrotors have generated considerable interest in both the control community due to their simple dynamics and widely applications because of their advantages over regular air vehicles. Unlike other control algorithms that tend to linearize nonlinear systems, backstepping control does not work to cancel the nonlinearities in the system. This leads to more flexible designs since some of the nonlinear terms can contribute to the stability of the system. The backstepping control is implemented in this paper for the robustness of the quadrotor helicopter in the payload dropping process. This control algorithm is implemented on the parameters of an unmanned quadrotor helicopter platform known as Qball-X4 available at the Networked Autonomous Vehicles Lab of Concordia University. Simulation results carried out using a nonlinear model, and wherein the performance achieved with this control strategy is shown.
Study on the ecological wisdom of the grape drying room in Mazar village of Turpan from the perspective under the constraint of regional resources, China
Authors: Meng Fuli , He Yi
Published: April 2019

Productive grape-dry room in Turpan of Xinjiang is the core element of the spirit of the grape culture craftsman. Grape-drying house has 2 aspects of internal and external properties:(a)As productive building: which the process of using in regional resources about the practice of ecological agriculture；(b)As an oasis agricultural cultural heritage in Arid Areas:witnessing the history, culture and technology transmission and development of the ancient Silk Road in the Western is a living building sample, which has universal cultural and practical value in the current production and life, culture, etc.This paper is select studying of the traditional grape growing area of Mazar Village, which using the approach of interdisciplinary to cultural geography and ecology,and it is combed the characteristics of 4 aspects of ecological economic artistic and aesthetic of the Grape-drying House from the perspective of the Craftsman's Spirit. The artcle is analysised of 3 aspects from coping with climate resources, coordination of human land relations and building schem construction . The results show that: Concising 7 types of special regional environment to create unique ecological practice model (The upper layer is the Grape-drying room and the lower is the Living room;Building around the dwellings; Building in high altitude ventilation and shelter;Low technology and lower consumption ;The principle of appropriate balance of land using, etc. This study provides some reference for the later research.
Ghost-removal image warping for optical flow estimation
Authors: Wang Song , Wang Zengfu
Published: April 2019

Traditional image warping methods used in optical flow estimation usually adopt simple interpolation strategies to obtain the warped images. But without considering the characteristic of occluded regions, the traditional methods may result in undesirable ghosting artifacts. To tackle this problem, in this paper we propose a novel image warping method to effectively remove ghosting artifacts. To be Specific, when given a warped image, the ghost regions are firstly discriminated using the optical flow information. Then, we use a new image compensation technique to eliminate the ghosting artifacts. The proposed method can avoid serious distortion in the warped images, therefore can prevent error propagation in the coarse-to-fine optical flow estimation schemes. Meanwhile, our approach can be easily integrated into various optical flow estimation methods. Experimental results on some popular datasets such as Flying Chairs and MPI-Sintel demonstrate that the proposed method can improve the performance of current optical flow estimation methods.
Machine translation using natural language processing
Authors: Rishita Middi Venkata Sai , Raju Middi Appala , Harris Tanvir Ahmed
Published: April 2019

Machine Translation is the translation of text or speech by a computer with no human involvement. It is a popular topic in research with different methods being created, like rule-based, statistical and examplebased machine translation. Neural networks have made a leap forward to machine translation. This paper discusses the building of a deep neural network that functions as a part of end-to-end translation pipeline. The completed pipeline would accept English text as input and return the French Translation. The project has three main parts which are preprocessing, creation of models and Running the model on English Text.
Rehabilitation recognition skeleton data depth learning based on RNN
Authors: Zhang Qingzhi , Wu Panfeng , Du Xiaohui , Sun Hualiang , Yu Lijia
Published: April 2019

With the extensive application of deep learning in the field of human rehabilitation, skeleton based rehabilitation recognition is becoming more and more concerned with large-scale bone data sets. The key factor of this task is the two intra frame representations of the combined co-and the inter-frame. In this paper, an inter frame representation method based on RNN is proposed. Pointtion of each joint is joint-coded they are assembled into semantic both spatial and temporal domains.we introduce a global spatial aggregation which is able to learn superior joint co features over local aggregation.
Numerical limit analysis of the ultimate load bearing capacity of a pier foundation under complex load
Authors: Wang H F , Cheng X H
Published: April 2019

A pier foundation has plenty of advantages as the foundation form for large onshore wind turbines in the terrain of the Gobi desert and collapsible loess areas. The ultimate load bearing capacity design, as an important part in the design phase of this foundation form, is not sufficiently in terms of design theory and the checking method, especially for application in collapsible loess areas. In this paper, numerical limit analysis has been employed to analyze the load bearing capacity for the scheme of selection of a pier foundation of a 100 MW wind farm in certain collapsible loess geology in Ningxia. The results were then compared with the empirical formulas, the limit equilibrium solutions and the finite element solutions to verify the accuracy of the results. It has been demonstrated that under the ultimate engineering load, the pier foundation can meet the stability requirement. In the ultimate state, whether the surrounding soil of the foundation falls in plasticity is associated with the ratio of the depth to the diameter of the foundation. The numerical limit analysis method can automatically determine the failure surface.
HHT based analysis on seismic response recordings for a base-isolated building
Authors: Wang Fei , Kang Xiandong , Yan Ting , Liu Ying
Published: April 2019

Hilbert-Huang transform (HHT) is proposed to process the seismic response recordings in an 8-story frame-shear wall base-isolated building. Empirical Mode Decomposition (EMD) method is first applied to identify the time variant characteristics and the data series can be decomposed into several components. Hilbert transform is well-behaved in identifying the frequency components. The first 5 intrinsic mode functions (IMFs) are decomposed with their different frequencies. The analytical function is reconstructed and compared with the original signal. They are extremely consistent in amplitude and phase. Based on the IMFs obtained, frequencies of the original signal are inferred at 5 Hz and 1.6 Hz. The higher frequency is regarded as the vibration excited by surface waves. 1.6 Hz is suggested as the dominant frequency of the building. Analysis indicates that HHT is accurate in extracting the dynamic characteristics of structural systems.
Facility management and building information modeling during operation and maintenance
Authors: FALTEJSEK Michal , CHUDIKOVA Blanka
Published: April 2019

BIM is a concept and also a method currently applied throughout the world in the modern building construction. The impact and benefits of the BIM method are clear across all stages of the life cycle of buildings (project, realization, operation, demolition). The longest and most expensive phase of buildings life is the operation and usage part. Many common aspects and linkage of processes between the BIM method and the facility management, i.e. a modern asset management method, can provide greater efficiency for these activities, help reduce the cost of required building operations and maintenance and save time for individual activities. The BIM can be understood as an information management of buildings. Many common elements can create a synergy of processes related to the management of buildings. The article discusses these aspects and emphasizes the listing of the basic data and processes that are necessary for mutual interconnectedness.
Image quality classification algorithm based on InceptionV3 and SVM
Authors: Li Yu , Liu Lizhuang
Published: April 2019

In this work we investigate the use of deep learning for image quality classification problem. We use a pre-trained Convolutional Neural Network (CNN) for image description, and the Support Vector Machine (SVM) model is trained as an image quality classifier whose inputs are normalized features extracted by the CNN model. We report on different design choices, ranging from the use of various CNN architectures to the use of features extracted from different layers of a CNN model. To cope with the problem of a lack of adequate amounts of distorted picture data, a novel training strategy of multi-scale training, which is selecting a new image size for training after several batches, combined with data augmentation is introduced. The experimental results tested on the actual monitoring video images shows that the proposed model can accurately classify distorted images.
A novel approach for solving multi-objective unit commitment based on decompositioncoordination
Authors: Zhang Yungui , Li Huizhao , Wang Xue , Zeng Yan
Published: April 2019

Multi-objective unit commitment (MOUC) considers simultaneously both economic and environmental objectives, then finds the best trade off with respect to these objectives. This paper proposes a novel model for MOUC, and a decomposition coordination approach is presented to solve the model. The MOUC model considers environmental objective by introducing a novel penalty term, and it's a quantized term for preference of environmental objective, which could be a basis for carbon tax makers. The model is solved by a decomposition coordination approach, which decomposes the whole system into subsystems and performs an iterative process. During each iteration step, the tie-line is updated based on the margin price in connected subsystems, then, each subsystem is solved by Lagrangian relaxation (LR), and the result is improved during iterations as shown in case studies. Besides, as LR does not require uploading units' parameters, it protects the privacy of generating companies. Numerical case studies considering different scenarios, conducted using the proposed multi-objective model, are applied to illustrate the robustness as well as the performance of the approach.
Effect of different curing conditions on compressive strength and durability of kenaf fibre reinforced blended cementitious composites
Authors: Ahmad R. , Hamid R. , Osman S. A.
Published: April 2019

This paper investigates the effect of normal curing (NC), air curing (AC), and burlap curing (BC) under different curing periods on the mechanical strength and durability of kenaf fibre reinforced blended cementitious composites (KFRBCC) with thermally activated alum sludge ash (AASA). The aim is to determine the most efficient condition and period for curing KFRBCC and to assess the effect of accelerated ageing on strength and durability of KFRBCC after wet/dry cycles. Meanwhile, the microstructure of these mixes is observed via scanning electron microscopy (SEM). The KFRBCC is designed to achieve strength beyond 50 MPa after 28 days (d) of curing by adding 2% treated kenaf fibre (KF) and by replacing Ordinary Portland Cement (OPC) with AASA. The findings suggest that compressive strength and durability of KFRBCC with 40% AASA cured under BC after age of 28 d are enhanced. The addition of treated KF with AASA have helped in limiting the reduction in the compressive strength and durability of the KFRBCC, particularly under prolonged curing period.