System of identification and monitoring of technical state of land transport-processing machines

2021 ◽  
Vol 0 (5) ◽  
pp. 44-49
Author(s):  
V. A. Zorin ◽  
◽  
N. I. Baurova ◽  
P.V. Stepanov ◽  
M. M. Styskin ◽  
...  
Keyword(s):  
Proper Time ◽  
Technical State ◽  
Physical Models ◽  
Specific Class ◽  
Diagnostic Data ◽  
Technological Processes ◽  
Maintenance System ◽  
Intermediate States ◽  
Reliability Control ◽  
Proactive Maintenance

Formation problems of a system for identification, monitoring of the technical state and proactive maintenance of airfield land transport-processing machines by using diagnostic data are discussed. The main goal of development and implementation the proactive maintenance system is reliability control and operation safety of transport-processing machines. For the solution of this problem it is necessary to identify and prevent damages in proper time. It requires to assign the specific class of intermediate states named the pre- emergency state class. Logical and physical models describing changes in machine states, technological processes, geolocation, event visualization are discussed. The implementation results of the system of identification, monitoring of the technical state and remote proactive maintenance of airfield land transport-processing machines by using diagnostic data are presented.

THE FUTURE OF SHEEP BREEDING IN THE DEVELOPMENT OF INTENSIVE TECHNOLOGIES

2021 ◽  
pp. 14-19
Author(s):  
G.T. BOBRYSHOVA ◽  
Keyword(s):  
Detailed Analysis ◽  
Animal Husbandry ◽  
Domestic Sheep ◽  
Sheep Breeding ◽  
Technological Processes ◽  
The Past ◽  
Maintenance System ◽  
Previous Level ◽  
Farm Mechanization ◽  
The Cost

The article analyzes and identifi es problematic points on the way of development of domestic sheep breeding. The cost-eff ective development of sheep breeding depends on many factors: correctly selected zoned sheep breeds, the maintenance system, the feed base, breeding work carried out on the farm, mechanization and automation of technological processes, etc. A step-by-step review of the formation and development of one of the most important branches of animal husbandry – sheep breeding, showed that even in the period 1960-1990 last century, it was industrial and profi table, but by 2000, due to the situation that arose, there was a reduction in the number of sheep and the liquidation of many farms. The number of sheep and goats by 2000, in comparison with 1990, amounted to 25.4% and in subsequent years did not recover to the previous level. Summarizing the achievements of the past years,their detailed analysis, illustrations of individual zootechnical and technological processes that clearly demonstrate the possibility of successful, effi cient and industrial sheep breeding, the use of this experience at this time will contribute to the stable and eff ective development of the industry and the elimination of the identifi ed problems.

Energy-Saving Electrical Installations for Heat Supply of Agricultural Objects

2019 ◽  
pp. 96-122 ◽  
Author(s):  
Dmitry Tikhomirov ◽  
Alexey Vasiliev ◽  
Stepan Dudin
Keyword(s):  
Energy Saving ◽  
Heat Supply ◽  
Electrical Energy ◽  
Electrical Equipment ◽  
Physical Models ◽  
Thermal Processes ◽  
High Quality ◽  
Technological Processes ◽  
Effective Use ◽  
Operating Regimes

Electrical energy in the thermal processes of agricultural production has a number of technical and technological advantages in comparison with other energy carriers. At the same time, electricity is the most high-quality but expensive type of energy. The effective use of electrical energy in thermal processes is possible with the implementation of all its advantages over fuel energy. This requires a system of technical, economic, and energy analysis and the selection justification of the most effective systems and technical means of heat supply of stationary agricultural technological processes. The chapter presents functional and technological schemes, physical models, the experimentally obtained dependencies, parameters, and operating regimes of the developed energy-saving electrical equipment and systems for the main thermal technological processes.

Proactive maintenance strategy for harbour crane operation improvement

Robotica ◽  
2003 ◽  
Vol 21 (3) ◽  
pp. 313-324 ◽  
Author(s):  
B. Iung ◽  
G. Morel ◽  
J.B. Léger
Keyword(s):  
Enterprise System ◽  
Maintenance Strategy ◽  
Modeling Framework ◽  
Maintenance System ◽  
Intelligent Maintenance ◽  
Quay Cranes ◽  
Technical Issues ◽  
Maintenance Process ◽  
Intelligent Maintenance System ◽  
Proactive Maintenance

Quay cranes are particular transportation devices for which operation's safety and CRAMP parameters (Cost, Reliability, Availability, Maintainability, and Productivity) should be fulfilled with regard to a harbor maintenance strategy. The maintenance process is first considered within a holistic modeling framework in order to cope with the current practices of treating strategic, operational and engineering maintenance issues independently without taking into account their interactions within an entire Enterprise System. Proactive maintenance is then highlighted as a new model aiming to globally optimize the components operation parameters throughout three interacting prognosis, diagnosis and monitoring processes. Technical issues related to Intelligent Maintenance System are finally proposed in order to support proactive maintenance operations at the enterprise field level and applied to quay cranes in a particular site within the frame of the European Eureka ‘Robcrane' project.

scholarly journals Optimization of Maintenance Activity Using the World-Class Maintenance System in Skidder Forest Operations

2019 ◽  
Vol 11 (10) ◽  
pp. 162 ◽  
Author(s):  
Carlos Cézar Cavassin Diniz ◽  
Diellen Lydia Rothbarth ◽  
Eduardo da Silva Lopes ◽  
Gabriel de Magalhães Miranda ◽  
Henrique Soares Koehler ◽  
...  
Keyword(s):  
Eucalyptus Grandis ◽  
Production Costs ◽  
Maintenance Cost ◽  
Maturation Stage ◽  
Hydraulic Oil ◽  
Maintenance System ◽  
Time Between Failures ◽  
World Class ◽  
Maintenance Activities ◽  
Proactive Maintenance

The objective of this paper was to evaluate technical and economically the use of a world-class maintenance system (WCM) in the forest skidding operations. The study was performed in a forest company located in the state of Paraná, inside forest plantations of Pinus taeda and Eucalyptus grandis. For the purpose of analysis, the mechanical availability, hydraulic oil consumption, average time between failures, average repair time, proactive maintenance index and maintenance costs were evaluated during 18 months, considering the stages of implantation, maturation and stabilization of the WCM system. As a result, there was an increase in the percentage of mechanical availability and reduction of 47.0% in the consumption of hydraulic oil from Skidder in the maturation stage. Also, the average time between failures and repairs increased in the maturation stage, caused by a quality improvement of maintenance activities. Moreover, in the maturation stage there was an increase of 45.0% in the proactive maintenance index. Additionally, it was verified that the hourly maintenance cost was reduced by 8.0% between the maturation and stabilization stages, underlining the WCM system’s potential to improve maintenance activities in the forest skidding operation. These results show that the WCM system can contribute to safety in wood harvesting operations, increasing the Skidder mechanical availability and a reducing the production costs.

scholarly journals GLOBAL FLUCTUATIONS IN PHYSICAL SYSTEMS: A SUBTLE INTERPLAY BETWEEN SUM AND EXTREME VALUE STATISTICS

2008 ◽  
Vol 22 (20) ◽  
pp. 3311-3368 ◽  
Author(s):  
MAXIME CLUSEL ◽  
ERIC BERTIN
Keyword(s):  
Extreme Values ◽  
Random Variables ◽  
Extreme Value ◽  
Physical Models ◽  
Extreme Value Statistics ◽  
Specific Class ◽  
Qualitative Properties ◽  
Rigorous Results ◽  
General Mapping ◽  
Global Fluctuations

Fluctuations of global additive quantities, like total energy or magnetization for instance, can in principle be described by statistics of sums of (possibly correlated) random variables. Yet, it turns out that extreme values (the largest value among a set of random variables) may also play a role in the statistics of global quantities, in a direct or indirect way. This review discusses different connections that may appear between problems of sums and of extreme values of random variables, and emphasizes physical situations in which such connections are relevant. Along this line of thought, standard convergence theorems for sums and extreme values of independent and identically distributed random variables are recalled, and some rigorous results as well as more heuristic reasonings are presented for correlated or non-identically distributed random variables. More specifically, the role of extreme values within sums of broadly distributed variables is addressed, and a general mapping between extreme values and sums is presented, allowing us to identify a class of correlated random variables whose sum follows (generalized) extreme value distributions. Possible applications of this specific class of random variables are illustrated on the example of two simple physical models. A few extensions to other related classes of random variables sharing similar qualitative properties are also briefly discussed, in connection with the so-called BHP distribution.

Reliability control of technological processes of parts processing by dynamic methods of surface plastic deformation

2020 ◽  
pp. 419-423
Author(s):  
M.A. Tamarkin ◽  
E.E. Tishchenko ◽  
T.S. Sosnitskaya ◽  
S.A. Novokreshchenov
Keyword(s):  
Plastic Deformation ◽  
Hardened Layer ◽  
Surface Plastic Deformation ◽  
Surface Plastic ◽  
Technological Parameters ◽  
Degree Of Deformation ◽  
Technological Processes ◽  
Dynamic Methods ◽  
Reliability Control ◽  
Deformation Treatment

The results of parts processing processes by dynamic methods of surface plastic deformation taking into account their reliability are presented. Dependencies are identified to determine surface roughness, depth of the hardened layer and degree of deformation for various dynamic methods of surface plastic deformation treatment. Processing time is defined. Studies of the considered technological processes reliability by technological parameters are carried out. Technological recommendations on design of technological processes and application of research results are given.

Recent Radiative and Collisional Atomic Data of Astrophysical Interest

1988 ◽  
Vol 102 ◽  
pp. 129-132
Author(s):  
K.L. Baluja ◽  
K. Butler ◽  
J. Le Bourlot ◽  
C.J. Zeippen
Keyword(s):  
Mass Production ◽  
Bound States ◽  
Physical Models ◽  
Impact Excitation ◽  
Electron Impact Excitation ◽  
Atomic Data ◽  
Isoelectronic Sequence ◽  
Astrophysical Interest ◽  
Radiative Transitions ◽  
Forbidden Transitions

SummaryUsing sophisticated computer programs and elaborate physical models, accurate radiative and collisional atomic data of astrophysical interest have been or are being calculated. The cases treated include radiative transitions between bound states in the 2p4and 2s2p5configurations of many ions in the oxygen isoelectronic sequence, the photoionisation of the ground state of neutral iron, the electron impact excitation of the fine-structure forbidden transitions within the 3p3ground configuration of CℓIII, Ar IV and K V, and the mass-production of radiative data for ions in the oxygen and fluorine isoelectronic sequences, as part of the international Opacity Project.

Cryo-TEM of amphiphilic polymer and amphiphile/polymer solutions

1993 ◽  
Vol 51 ◽  
pp. 876-877
Author(s):  
Yeshayahu Talmon
Keyword(s):  
Microstructural Characterization ◽  
Building Blocks ◽  
Quantitative Information ◽  
Physical Models ◽  
Specimen Preparation ◽  
Time Resolved ◽  
Temperature Changes ◽  
Temperature And Humidity ◽  
Microstructured Fluids ◽  
Air Streams

To achieve complete microstructural characterization of self-aggregating systems, one needs direct images in addition to quantitative information from non-imaging, e.g., scattering or Theological measurements, techniques. Cryo-TEM enables us to image fluid microstructures at better than one nanometer resolution, with minimal specimen preparation artifacts. Direct images are used to determine the “building blocks” of the fluid microstructure; these are used to build reliable physical models with which quantitative information from techniques such as small-angle x-ray or neutron scattering can be analyzed.To prepare vitrified specimens of microstructured fluids, we have developed the Controlled Environment Vitrification System (CEVS), that enables us to prepare samples under controlled temperature and humidity conditions, thus minimizing microstructural rearrangement due to volatile evaporation or temperature changes. The CEVS may be used to trigger on-the-grid processes to induce formation of new phases, or to study intermediate, transient structures during change of phase (“time-resolved cryo-TEM”). Recently we have developed a new CEVS, where temperature and humidity are controlled by continuous flow of a mixture of humidified and dry air streams.

Clinical Update: Assessing Maximum Medical Improvement in Carpal Tunnel Syndrome

2003 ◽  
Vol 8 (4) ◽  
pp. 4-5
Author(s):  
Christopher R. Brigham ◽  
James B. Talmage
Keyword(s):  
Carpal Tunnel Syndrome ◽  
Carpal Tunnel ◽  
Proper Time ◽  
Carpal Tunnel Release ◽  
Hand Function ◽  
Factors Affecting ◽  
Early Results ◽  
Medical Evaluation ◽  
Nerve Recovery ◽  
Tunnel Syndrome

Abstract Permanent impairment cannot be assessed until the patient is at maximum medical improvement (MMI), but the proper time to test following carpal tunnel release often is not clear. The AMA Guides to the Evaluation of Permanent Impairment (AMA Guides) states: “Factors affecting nerve recovery in compression lesions include nerve fiber pathology, level of injury, duration of injury, and status of end organs,” but age is not prognostic. The AMA Guides clarifies: “High axonotmesis lesions may take 1 to 2 years for maximum recovery, whereas even lesions at the wrist may take 6 to 9 months for maximal recovery of nerve function.” The authors review 3 studies that followed patients’ long-term recovery of hand function after open carpal tunnel release surgery and found that estimates of MMI ranged from 25 weeks to 24 months (for “significant improvement”) to 18 to 24 months. The authors suggest that if the early results of surgery suggest a patient's improvement in the activities of daily living (ADL) and an examination shows few or no symptoms, the result can be assessed early. If major symptoms and ADL problems persist, the examiner should wait at least 6 to 12 months, until symptoms appear to stop improving. A patient with carpal tunnel syndrome who declines a release can be rated for impairment, and, as appropriate, the physician may wish to make a written note of this in the medical evaluation report.

“The Unconscious” in Current Psychology

2010 ◽  
Vol 15 (3) ◽  
pp. 193-201 ◽  
Author(s):  
Elisabeth Norman
Keyword(s):  
Cognitive Psychology ◽  
Verbal Report ◽  
Psychological Research ◽  
Operational Definition ◽  
The Unconscious ◽  
Apparent Lack ◽  
Unconscious Processing ◽  
Unconscious Processes ◽  
Intermediate States ◽  
Definition Of

A series of vignette examples taken from psychological research on motivation, emotion, decision making, and attitudes illustrates how the influence of unconscious processes is often measured in a range of different behaviors. However, the selected studies share an apparent lack of explicit operational definition of what is meant by consciousness, and there seems to be substantial disagreement about the properties of conscious versus unconscious processing: Consciousness is sometimes equated with attention, sometimes with verbal report ability, and sometimes operationalized in terms of behavioral dissociations between different performance measures. Moreover, the examples all seem to share a dichotomous view of conscious and unconscious processes as being qualitatively different. It is suggested that cognitive research on consciousness can help resolve the apparent disagreement about how to define and measure unconscious processing, as is illustrated by a selection of operational definitions and empirical findings from modern cognitive psychology. These empirical findings also point to the existence of intermediate states of conscious awareness, not easily classifiable as either purely conscious or purely unconscious. Recent hypotheses from cognitive psychology, supplemented with models from social, developmental, and clinical psychology, are then presented all of which are compatible with the view of consciousness as a graded rather than an all-or-none phenomenon. Such a view of consciousness would open up for explorations of intermediate states of awareness in addition to more purely conscious or purely unconscious states and thereby increase our understanding of the seemingly “unconscious” aspects of mental life.

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