scholarly journals CONTROL OF PASSAGE THROUGH RESONANCE ZONE FOR 1-ROTOR VIBRATION UNIT WITH TIME-VARYING LOAD

2021 ◽  
pp. 97-105
Author(s):  
O.P. Tomchina ◽  
D.V. Gorlatov ◽  
D.A. Tomchin ◽  
A.E. Epishkin
Keyword(s):  
Inclination Angle ◽  
Practical Implementation ◽  
Rotor Vibration ◽  
Mass Sensors ◽  
Resonance Zone ◽  
Loading Mode ◽  
Gradient Algorithms ◽  
Simplified Algorithm ◽  
The One ◽  
Loading Modes

The speed-gradient algorithms for controlled passage through the resonance zone of the one-rotor vibration unit are studied by computer simulation. The objective of the study is to analyze dependence of the control performance on the loading mode and the electric drive dynamics. In order to obtain an algorithm better suitable for practical implementation the theoretically designed algorithm is simplified by simplifying the expression for the total energy. First of all, we neglect the terms corresponding to the kinetic and potential energy of the load, since there are no load mass sensors on the stand. the term containing the inclination angle of the platform is neglected. In addition, the platform inclination angle and dynamics of the drives were neglected too. Efficiency of the proposed simplified algorithm for different loading modes, including linear loading with different loading rates and sine-shaped oscillatory loading.

scholarly journals Resistance of Polymeric Laminates Reinforced with Fabrics against the Growth of Delaminations

Materials ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 7367
Author(s):  
Piotr Czarnocki
Keyword(s):  
Strain Energy ◽  
Strain Energy Release Rate ◽  
Strain Energy Release ◽  
Mode I ◽  
Element Analysis ◽  
Loading Mode ◽  
Hybrid Beam ◽  
The One ◽  
Loading Modes ◽  
Delamination Front

Dependence of the initiation values of the Strain Energy Release Rate, GCi, on the orientation of the reinforcement direction α relative to the delamination front was investigated for two laminates of different interfacial ply arrangements. In the case of the first laminate, the delamination was located at the interface of the layers reinforced with symmetric fabric and unidirectional fabric. In the case of the second laminate, the delamination was located at the interface of layers reinforced with symmetric fabric. In both laminates, the orientation of fibers in the layers separated by the delamination differed by 45° regarding the warp directions. The investigations were carried out for Mode I, Mode II, and Mixed-Mode I/II (GII/GI = 1 and GII/GI = 1.7) loadings using hybrid beam specimens. The major problem appearing in the intended tests was the inevitable lack of symmetry in the xz and xy planes of the specimens and the resulting deformation and stress–strain couplings, causing undesired loading modes. To decrease these couplings, especially designed hybrid beam specimens were used. An auxiliary finite element analysis was performed to assess the remaining effects of the reduced couplings. To ascertain whether statistically significant differences between Gci values for different α occurred, the one-way analysis of variance supplemented by Levene’s test was carried out. The dependence of Gci on α was found out for both laminates. However, it was not equally strong, and it turned out that the loading mode and the interfacial ply were arrangement sensitive.

P20 phosphor on polyimide as a large area high-resolution transmission screen for slow scan CCD systems

1995 ◽  
Vol 53 ◽  
pp. 20-21
Author(s):  
C. C. Ahn ◽  
S. Karnes ◽  
M. Lvovsky ◽  
C. M. Garland ◽  
H. A. Atwater ◽  
...  
Keyword(s):  
Mechanical Stability ◽  
High Energy ◽  
Practical Implementation ◽  
Line Pair ◽  
Modulation Transfer ◽  
Large Area ◽  
Ccd Imaging ◽  
Transmission Electron ◽  
The One ◽  
Beam Broadening

The bane of CCD imaging systems for transmission electron microscopy at intermediate and high voltages has been their relatively poor modulation transfer function (MTF), or line pair resolution. The problem originates primarily with the phosphor screen. On the one hand, screens should be thick so that as many incident electrons as possible are converted to photons, yielding a high detective quantum efficiency(DQE). The MTF diminishes as a function of scintillator thickness however, and to some extent as a function of fluorescence within the scintillator substrates. Fan has noted that the use of a thin layer of phosphor beneath a self supporting 2μ, thick Al substrate might provide the most appropriate compromise for high DQE and MTF in transmission electron microcscopes which operate at higher voltages. Monte Carlo simulations of high energy electron trajectories reveal that only little beam broadening occurs within this thickness of Al film. Consequently, the MTF is limited predominantly by broadening within the thin phosphor underlayer. There are difficulties however, in the practical implementation of this design, associated mostly with the mechanical stability of the Al support film.

scholarly journals Use of battery swapping for improving environmental balance and price-performance ratio of electric vehicles

2021 ◽  
Author(s):  
Steffen Schmidt
Keyword(s):  
Electric Vehicles ◽  
Performance Ratio ◽  
Practical Implementation ◽  
Sustainable Mobility ◽  
Long Distance ◽  
Environmentally Sustainable ◽  
Battery Capacity ◽  
Battery Packs ◽  
Environmental Balance ◽  
The One

<p> There is a simple concept that can significantly improve the environmental balance of battery electric vehicles and at the same time avoid the known disadvantages of these vehicles (short range, long charging times, high acquisition costs) without having to wait for further developed batteries or a higher proportion of green electricity. For this purpose, the vehicles are equipped with built-in batteries for short and medium distances and are therefore sufficient for the majority of daily journeys. For long-distance journeys, the driver borrows charged additional battery packs at swapping stations, which are automatically inserted into a standardised exchange slot within a few minutes. This paper focuses on the improvements in electric vehicles that can be achieved by combining built-in and exchangeable battery technique and also on the practical feasibility of the concept. It is shown that the battery capacity required for the entire vehicle fleet can be significantly reduced. The resulting ecological advantages on the one hand and grid-stabilising effects of a nationwide network of swapping stations on the other hand, support the transition to environmentally sustainable mobility. The characteristics of the concept presented are advantageous for its practical implementation. The acceptance by customers and manufacturers can thus be improved compared to previous battery swapping systems. The loan system for the exchange batteries may be designed conveniently and information security as well as data protection will be strictly complied.</p>

scholarly journals INDICATIVE APPROACH IN THE EVALUATION OF THE IMPLEMENTATION OF THE CONSTITUTIONAL RIGHT TO JUDICIAL PROTECTION IN THE STATE LANGUAGES OF THE RF SUBJECTS

2019 ◽  
Vol 8 (6) ◽  
Author(s):  
Damir Kh. Valeev ◽  
Anas G. Nuriev ◽  
Rafael V. Shakirjanov
Keyword(s):  
Russian Federation ◽  
The State ◽  
Practical Implementation ◽  
Current State ◽  
Hand Signal ◽  
The Russian Federation ◽  
Civil Cases ◽  
Constitutional Right ◽  
The One ◽  
Judicial Protection

The implementation of the constitutional right to judicial protection is an important guarantee for participants in legal relations in case of violation of the rights of one of the parties or a threat of violation of the rights of participants in legal relations. Judicial protection is of particular relevance for the participants in legal relations, who do not speak the languages in which the administration of justice is carried out. Within the framework of this article, the authors analyze indicators that are designed to, on the one hand, signal on the current state and existing possibilities of implementing the constitutional right to judicial protection in the state languages of the subject of the Russian Federation (statistical function), and, on the other hand, determine growth drivers that can provide language guarantees for the territory of our state, which is defined as a democratic federal legal state according to Art. 1 of the Constitution of the Russian Federation. Within the framework of this article, three indicators are highlighted and analyzed: 1) existing legal potential for the implementation of the constitutional right to judicial protection in civil cases in the state languages of the republics within the Russian Federation; 2) analysis of the practical implementation of the opportunities currently available for the implementation of the constitutional right to judicial protection in civil cases in the state languages of the republics within the Russian Federation; 3) determination of growth points in the implementation of the constitutional right to judicial protection in civil cases in the state languages of the republics within the Russian Federation

Numerical Solution of the Differential Diffusion Equation for a Steel Carburizing Process

2018 ◽  
Vol 284 ◽  
pp. 1230-1234
Author(s):  
Mikhail V. Maisuradze ◽  
Alexandra A. Kuklina
Keyword(s):  
Diffusion Equation ◽  
Numerical Solution ◽  
Differential Diffusion ◽  
One Dimensional ◽  
The Third ◽  
Dimensional Diffusion ◽  
Simplified Algorithm ◽  
The One ◽  
Carburizing Process ◽  
Precise Assessment

The simplified algorithm of the numerical solution of the differential diffusion equation is presented. The solution is based on the one-dimensional diffusion model with the third kind boundary conditions and the finite difference method. The proposed approach allows for the quick and precise assessment of the carburizing process parameters – temperature and time.

scholarly journals Estimation of the jet inclination angle for the TDE Swift J1644+57

2019 ◽  
Vol 492 (2) ◽  
pp. 1634-1640
Author(s):  
Sudip Chakraborty ◽  
Sudip Bhattacharyya ◽  
Chandrachur Chakraborty ◽  
A R Rao
Keyword(s):  
Black Hole ◽  
Data Analysis ◽  
Inclination Angle ◽  
Jet Physics ◽  
Triggering Mechanism ◽  
Tidal Disruption ◽  
X Ray ◽  
Upper Limit ◽  
The One ◽  
Disruption Event

ABSTRACT An estimate of the jet inclination angle relative to the accreting black hole’s spin can be useful to probe the jet triggering mechanism and the disc–jet coupling. A tidal disruption event (TDE) of a star by a supermassive spinning black hole provides an excellent astrophysical laboratory to study the jet direction through the possibility of jet precession. In this work, we report a new method to constrain the jet inclination angle β and apply it to the well-sampled jetted TDE Swift J1644+57. This method involves X-ray data analysis and comparisons of jet models with broad properties of the observed X-ray dips, to estimate the upper limit of the extent of the contribution of a plausible jet precession to these X-ray dips. From this limit, we find that β is very likely to be less than ∼15° for Swift J1644+57. Such a well-constrained jet inclination angle could be useful to probe the jet physics. The main advantage of our method is that it does not need to assume an origin of the observed X-ray dips, and the conclusion does not depend on any particular type of jet precession (e.g. the one due to the Lense–Thirring effect) or any specific value of precession frequency or any particular jet model. These make this method reliable and applicable to other jetted TDEs, as well as to other jetted accreting systems.

Analysis of Collected Heat by Solar Collectors Fixed on the Outside Wall of Balcony

2011 ◽  
Vol 219-220 ◽  
pp. 633-637
Author(s):  
Li Xi Zhang ◽  
Shi Yuan Gao ◽  
Qing Yuan He ◽  
He Fei Zhang
Keyword(s):  
Water Temperature ◽  
Inclination Angle ◽  
Total Heat ◽  
Solar Collectors ◽  
The South ◽  
Extra Energy ◽  
South Wall ◽  
Inclination Angles ◽  
The One

It is studied the collected heat by collectors fixed on the outside wall of balconies when the shape and direction of balconies, and inclination angle of collectors are changed. Total heat collected by three walls of the rectangle balcony toward southeast or southwest is more than the one collected under other conditions. Total heat collected by rectangle balcony toward south would be increased when the inclination angles β of collectors are reduced. As β=70°, and the collectors were installed only on the south wall, to make water temperature above 60 °C in 150 L tank, extra energy needed is equivalent to 46.5 kg/a standard coal; if collectors were installed outside three walls of balcony, extra energy is not needed.

Worker Involvement, the New Technologies and New Forms of Company Organization

1999 ◽  
Vol 4 (1) ◽  
pp. 69-82
Author(s):  
Gerhard Leminsky
Keyword(s):  
Personal Development ◽  
Management Strategy ◽  
New Technologies ◽  
Self Organization ◽  
Practical Implementation ◽  
Democratic Participation ◽  
Grass Roots ◽  
The Past ◽  
The One ◽  
Real Responsibility

The concept of democratic participation has been receiving wide attention over the past few years — both in Germany and at the European level. Unfortunately, the same cannot be said for social and corporate praxis where practical implementation of the idea encounters ingrained resistance and reservations from different groups. On the one hand, the trades unions are afraid that forms of direct democratic involvement will act in competition to the institutionalized forms of in-company codetermination; on the other, many managers — having discovered that worker involvement is a good way to improve both productivity and quality — are simultaneously opposed to the transfer to the grass roots of any real responsibility or decision making rights. Nevertheless, the narrow use of employee participation as a mere management strategy should not obscure our view of the opportunities for self-organization, democratization and personal development that are inherent to democratic participation.

«The roads of Power’s soul»: project of development of autotransport infrastructure and of roadside service in the Central Federal District

2015 ◽  
Vol 9 (3) ◽  
pp. 49-60 ◽  
Author(s):  
Юрий Копылов ◽  
Yuriy Kopylov ◽  
Александр Федулин ◽  
Aleksandr Fedulin ◽  
Олег Афанасьев ◽  
...  
Keyword(s):  
Tourism Development ◽  
Development Program ◽  
Federal District ◽  
Road Transport ◽  
Development Project ◽  
Practical Implementation ◽  
Central Federal District ◽  
Economic Interaction ◽  
The Creation ◽  
The One

The development Program project of road transport and tourism infrastructure «The roads of Power´s Soul» is presented in the article. The program was developed by the Coordinating Council for the development of tourism in the Central Federal District (CFD) of the Association of interregional social and economic interaction «Central Federal District» and the Russian State University of Tourism and Service. The urgency of the creation of generalizing, integral tourism and tourist services development programs for all regions of the CFD is justified in the article. It was noted that tourism is the rapidly growing sector of the economy CFD. But comprehensive solution of issues related to creation of the new tourism products cannot be provided by the only development of the infrastructure. This hinders the development of effective promotion tools, introduction of innovative technologies, staff training in the tourism and service of district. The creation of a unified tourism space is the one of the main directions of the tourism sector development in the Central Federal District. Such approach can only be implemented within a unified inter-regional program of tourism development in district and creating a tourist cluster with the active participation of each subject of the CFD. The program development project of road transport and tourism infrastructure in 2015 - 2025 is proposed in the article. The goals, objectives, stages, outcomes of the program are defined. The scheme of the complex federal automobile segmented tourist ring route through the territory of all the regions - subjects of the CFD is proposed. The main results of a comprehensive analysis of tourist routs, facilities and activities recommended for inclusion in the program are rep- resented. The criteria for selection of destinations and also companies and organizations of tourism infrastructure for inclusion in the Program are substantiated. It is concluded that practical implementation of developed Program is very important; it might be very effective for the tourism development in the Central Federal District and Russia as a whole.

scholarly journals An Empirical Framework for Intersection Optimization Based on Uniform Design

2017 ◽  
Vol 2017 ◽  
pp. 1-10 ◽  
Author(s):  
Ying Zhang ◽  
Daniel Jian Sun ◽  
Alexandra Kondyli
Keyword(s):  
Performance Optimization ◽  
Uniform Design ◽  
Signalized Intersections ◽  
Simulation Software ◽  
Practical Implementation ◽  
Control Delay ◽  
Software Packages ◽  
The One ◽  
Entire Network

Operational performance optimization of signalized intersections is one of the most important tasks for traffic engineers and researchers. To compensate for the limitations of practical implementation, simulation software packages have been widely used to evaluate different optimization strategies and thus to improve the efficiency of the intersections as well as the entire network. However, for the existing optimization studies on signalized intersections, the relationships among various optimization measures and the combination of strategies have not been fully investigated. In this paper, uniform design experimentation was introduced to combine different optimization measures into strategies and achieve the minimum time cost in model construction. VISSIM software package was then calibrated and used to evaluate various optimization strategies and identify the one with the best measurement of performance, namely, control delay at the signalized intersection. By taking a representative congested intersection in Shanghai as a case study, the optimal strategy was identified to reduce the overall control delay by 27.3%, which further verified the modeling capability of the proposed method.

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