scholarly journals Digital radio based train control for safety assurance of maglev transportation

2016 ◽  
Vol 2 (3) ◽  
pp. 145-154
Author(s):  
V V Shmatchenko ◽  
P A Plekhanov
Keyword(s):  
Magnetic Levitation ◽  
Radio Channel ◽  
Practical Importance ◽  
Monitoring And Control ◽  
Digital Radio ◽  
Analysis And Synthesis ◽  
Control Automation ◽  
High Level ◽  
And Control ◽  
Working Out

Introduction. The Control System of Maglev Vehicles (further - CSMV) has key value for development maglev. Purpose. In article management by safe movement of maglev vehicles with use of digital radio channel are considered, the international experience is analysed and conclusions for Russian practice are drawn. Methodology. The following methods were used: system approach, analysis and synthesis, generalization. Results. CSMV should consider physical possibilities of magnetic levitation, factors and the restrictions influencing these possibilities, including - the factors connected with safety. CSMV should possess complex of functions allowing effectively, full and safely to realise possibility of magnetic levitation in conditions of specified factors and restrictions. Practical importance. The basic practical results, which can be received by working out CSMV, are: - creation CSMV with high level of control automation and consequently effective and safe; - working out within CSMV typical design decisions, applicable for adaptation to monitoring and control of problems various systems and maglev vehicles; - creation of preconditions of design and perfection of all complex of regulatory framework, conformity which provides safety of maglev infrastructure and vehicles; - reception of interaction experience of the Customer, the research and design organisations, the industry enterprises, the assembly and maintaining organisations at stages of life cycle of CSMV, as key subsystem of maglev. Conclusion. The main appointment of CSMV - creation and constant provide of conditions for safe and effective functioning and development of this new type of transport.

Study on the Construction of Intelligent Power Distribution Area of Rural Power Grid

2013 ◽  
Vol 846-847 ◽  
pp. 400-404
Author(s):  
Ya Jing Zhu ◽  
Hui Yu Tian ◽  
Ke Bi
Keyword(s):  
Rural Areas ◽  
Power Distribution ◽  
Integrated Management ◽  
Power Grid ◽  
Distribution Area ◽  
Monitoring And Control ◽  
Distribution Management ◽  
Power Load ◽  
High Level ◽  
And Control

In most of Chinas rural areas, the devices of power distribution area are low configured, simply designed and installed, and have few functions but lots of forms. Beyond, most of them only implement simple functions of power distribution and metering. They couldnt meet the needs of transformation of rural power grid. So its extremely urgent to reconstruct and build intelligent rural power distribution and realize the standardization of information model and the intelligent integrated management of power distribution area to improve the quality and reliability of power supply. In this paper, we analyzed the current development situation of Chinas rural area. Then from the aspect of solving the lagging intelligent level of rural power system, we do some research about developing a new intelligent integrated distribution box and distribution transformer terminal , then we propose the intelligent manage system of power distribution area to realize high intelligent level of power distribution management, high level monitoring and control and greatly improved manage efficiency. At the same time, we enhanced the serving strength for the customer and help to improved the entire intelligent power load , so we could supply high quality power to our customers.

Do You Know Your Onboard Temperature Sensing IC?

2011 ◽  
Author(s):  
Herman Chu
Keyword(s):  
Power Density ◽  
Empirical Work ◽  
Thermal Conditions ◽  
Temperature Sensing ◽  
Junction Temperature ◽  
Monitoring And Control ◽  
Monitoring And Control System ◽  
Sensor Temperature ◽  
High Level ◽  
And Control

It is a common practice in electronic packaging to deploy onboard temperature sensing ICs for thermal health monitoring and control. The IT equipment industry has seen exponential increase in power and power density growth on devices and PCBs. In turn, more and more IC temperature sensors are used in highly complex algorithms and are expected to be highly accurate in predicting the local thermal conditions. In many cases they are even used to correlate to air temperature. However, care must be taken in understanding the different factors that influence the temperature readings of these devices. Some of the factors that have direct impact on the quality of the temperature reading include parasitic heating due to adjacent components and placement location, airflow condition, circuit design in connecting these devices to the board, accuracy and tolerance of these devices. In addition, because of the increase in component power density, the temperature difference between the device temperature, for example junction temperature, and board sensor temperature can be very different and the range can vary a lot as well. In this paper, thermal numerical modeling, as well as empirical work at the system and board levels, was performed to understand the implications of the temperature readings from these devices. Several of the commercially available onboard temperature sensing ICs are compared as well. It is the intention of this work to point out these areas in order for thermal and system design practitioners to intelligently use these devices appropriately. Also, a high-level environmental monitoring and control system (EMCS) policy is illustrated for highly configurable multi-board equipment.

Offline and Online Learning of Signal Temporal Logic Formulae Using Decision Trees

2021 ◽  
Vol 5 (3) ◽  
pp. 1-23
Author(s):  
Giuseppe Bombara ◽  
Calin Belta
Keyword(s):  
Online Learning ◽  
Temporal Logic ◽  
Classification Problem ◽  
Monitoring And Control ◽  
Detection Problem ◽  
Execution Traces ◽  
Finite Set ◽  
High Level ◽  
And Control ◽  
Maritime Environment

In this article, we focus on inferring high-level descriptions of a system from its execution traces. Specifically, we consider a classification problem where system behaviors are described using formulae of Signal Temporal Logic (STL). Given a finite set of pairs of system traces and labels, where each label indicates whether the corresponding trace exhibits some system property, we devised a decision-tree-based framework that outputs an STL formula that can distinguish the traces. We also extend this approach to the online learning scenario. In this setting, it is assumed that new signals may arrive over time and the previously inferred formula should be updated to accommodate the new data. The proposed approach presents some advantages over traditional machine learning classifiers. In particular, the produced formulae are interpretable and can be used in other phases of the system’s operation, such as monitoring and control. We present two case studies to illustrate the effectiveness of the proposed algorithms: (1) a fault detection problem in an automotive system and (2) an anomaly detection problem in a maritime environment.

scholarly journals NEW SYSTEMS FOR MONITORING AND CONTROL OF DEFECTS AND DAMAGES OF BUILDING STRUCTURES

2020 ◽  
Vol 8 (1) ◽  
pp. 11-18
Author(s):  
Sergey Evtushenko ◽  
Timofey Krakhmalnyy ◽  
Vladimir Firsov ◽  
Viktoriya Lyepikhova ◽  
Mikhail Kuchumov
Keyword(s):  
Radio Channel ◽  
Crack Opening ◽  
Weather Conditions ◽  
Electric Signal ◽  
Recording Device ◽  
Building Structures ◽  
Monitoring And Control ◽  
Crack Open ◽  
Wide Range ◽  
And Control

The article presents the results of development of automated monitoring systems for defects and damages of building structures. The first is the "System for monitoring the state of cracks and joints of buildings and structures," this system allows to automatically control the width of crack opening on construction structures. The system has one or more sensors and a recording device in the form of a personal computer, the receiving radio module of the recording system over the radio channel is connected to each sensor and requests measure-ment results. The following describes the upgrade of the system sensor, the new sensor al-lows to measure humidity and ambient temperature and to build dependencies of crack open-ing width on weather conditions. The next sensor is mesdose to measure the stress in the ground of the base, based on the electrochemical principle of action. Mesdose allows to carry out dynamic tests of soils at the same time technical result is achieved in improvement of device reliability and measurement reliability. The last is the mechanical measurement sen-sor, which is also based on the electrochemical principle of operation. Invention is aimed at solving the problem of improving reliability and reliability of converting dynamic mechani-cal values into an electric signal in a wide range of loads and frequencies.

scholarly journals Assessment of efficiency of corporate accounting policy from the perspective of optimization of income tax

2020 ◽  
pp. 9-17
Author(s):  
Yuliya Vladimirovna Malakhova ◽  
Aleksei Evgenevich Malakhov ◽  
Irina Vladimirovna Sazonova
Keyword(s):  
Income Tax ◽  
Practical Importance ◽  
Economic Benefits ◽  
Tax Planning ◽  
Abstract Concepts ◽  
Tax Base ◽  
Analysis And Synthesis ◽  
Accelerated Depreciation ◽  
High Level ◽  
Accounting Policy

Accounting policy is one of the key instruments for optimizing taxation of a business. At the same time, many companies do not use this strategy to reduce their tax costs due to absence of tax planning, and thus, likelihood of receiving economic benefits from the changes in accounting policy. The subject of this research is the changes in corporate accounting policy, aimed at optimizing income tax. The author suggests methods of forecasting economic impact from implementation of accelerated depreciation. The work employs general scientific methods and approaches. Method of scientific abstraction allowed formulating abstract concepts, while methods of analysis and synthesis allowed studying separate elements of socioeconomic phenomena with subsequent combination of these elements into one whole. The scientific novelty of this study consists in the proposed methodology for optimizing tax base by income tax through changes in accounting policy within the framework of creating reserves, redistribution of costs, classification of expenses, etc. The conclusions carry practical importance and allow high level of precision in substantiation of management decisions pertaining to tax planning and optimization of taxation.

scholarly journals Choice of regional passenger transportation development model based on world-wide survey

2016 ◽  
Vol 2 (3) ◽  
pp. 57-69
Author(s):  
E M Volkova
Keyword(s):  
Policy Development ◽  
Practical Importance ◽  
Transportation Policy ◽  
Operating Conditions ◽  
Passenger Transportation ◽  
Analysis And Synthesis ◽  
Railway Passenger ◽  
Transportation Development ◽  
High Level ◽  
Regional Authorities

Introduction. Regional passenger companies (RPCs) split-off was a result of Russian railways restructuring. Now RPCs have some problems of development, one of them is insufficient funding from regional authorities. Purpose. The purpose of the research is identification of regional passenger transportation general tendencies and features in various countries on the base of international experience survey, including forms of interaction between RPCs and regional authorities. The research is focusing on the following aspects: 1) competition forms at suburban and regional passenger transportation markets; 2) railway infrastructure and vehicles ownership; 3) state or private ownership on regional passenger companies; 4) regional passenger transportation financing schemes; 5) possibilities of regional passenger transportation performance increasing. Methodology. For achievement of the research purpose general scientific methods were applied, such as: analysis and synthesis, generalization, analogy, comparison, induction, system approach. Results. The article has the analysis of competition forms at regional passenger transportation markets. Models of regional passenger transportation development in the world are classified into competition model and regulatory model. Practical importance. Results of the research can be used by regional authorities in case of transportation policy development, transport reforming and further regional passenger transportation improvement. Conclusion. The survey of regional passenger companies development should be considered in case of suburban railway passenger transportation reforming in our country. It must be kept in mind RPCs operating conditions in certain regions of Russia, the high level of social importance and historical aspects of suburban transportations development.

Development of computer models for the study of characteristics and optimization of telemetric monitoring and control systems

2017 ◽  
Vol 14 (4) ◽  
pp. 47-61
Author(s):  
T. S. Abbasova ◽  
E. M. Abbasov ◽  
Kuang Thieu Nguyen
Keyword(s):  
Control Systems ◽  
Communication Channel ◽  
Radio Channel ◽  
Digital Data ◽  
Monitoring And Control ◽  
Main Band ◽  
Monitoring And Control Systems ◽  
Butterworth Filters ◽  
And Control ◽  
Technical Measures

A radio channel with Butterworth filters for monitoring and telemetry systems with single-band quadrature frequency manipulation is created. The communication channel for the speed of 180 000 (Bit / s) was investigated for the presence of a minimum of inter-symbol distortion. The organizational and technical measures for designing, testing and setting up a digital data transmission stand in the main band (without a carrier) are described to justify the theoretical positions. The characteristics of the digital communication channel .

Sign in / Sign up

Export Citation Format

Share Document