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Three-phase thyristor switches are designed for pulsed formation of inrush currents of electrical equipment with their subsequent shunting in steady state operation. In transformer substations, they perform a bumpless turning on of a power transformer by connecting its primary winding first to two phases of the network at the moment of zero crossing by the phase voltage of the network third phase, and then to the network third phase at the moment of zero crossing by the line voltage of the other two network phases. In this case, the starting currents of the transformer almost immediately enter the steady state without the appearance of constant components in the magnetization currents and voltage drop. To expand the functionality of thyristor switches, it is proposed, in addition to bumpless turning on of a power transformer, to disconnect it without arcing between the contacts of electrical equipment, as well as to carry out continuous voltage regulation for consumers when voltage in the network changes. The proposed method and structure for its implementation on the basis of two three-phase thyristor reactor keys and a capacitor bank make it possible while changing the network voltage to stabilize the generated reactive power at the input of the substation without creating the current distortions in the power transformer and power transmission simultaneously with stabilizing the substation output voltage. Modeling and research of the start-regulating device as part of a transformer substation was carried out in the MatLab environment. The results of numerical experiments in stationary and dynamic modes of the substation operation showed the feasibility of using the developed technical solutions for the industrial power supply system.

Industrial control systems (ICSs) are used in various infrastructures and industrial plants for realizing their control operation and ensuring their safety. Concerns about the cybersecurity of industrial control systems have raised due to the increased number of cyber-attack incidents on critical infrastructures in the light of the advancement in the cyber activity of ICSs. Nevertheless, the operation of the industrial control systems is bind to vital aspects in life, which are safety, economy, and security. This paper presents a semi-supervised, hybrid attack detection approach for industrial control systems by combining Isolation Forest and Convolutional Neural Network (CNN) models. The proposed framework is developed using the normal operational data, and it is composed of a feature extraction model implemented using a One-Dimensional Convolutional Neural Network (1D-CNN) and an isolation forest model for the detection. The two models are trained independently such that the feature extraction model aims to extract useful features from the continuous-time signals that are then used along with the binary actuator signals to train the isolation forest-based detection model. The proposed approach is applied to a down-scaled industrial control system, which is a water treatment plant known as the Secure Water Treatment (SWaT) testbed. The performance of the proposed method is compared with the other works using the same testbed, and it shows an improvement in terms of the detection capability. Qatar Foundation; Qatar National Research Fund Scopus

Pakistan is facing a severe energy crisis of its time with significant generation deficit in recent years. The future plan shows hydro and thermal coal generation as major contributor and Wind power to replace Thermal-oil generation in long run. This paper proposes a Super grid model for the transfer of bulk power from generation station to the load centres, which can provide efficient transmission between generation and load centres and is also adaptive to deal with variations in power from renewable generations. A dynamic simulation analysis is performed on six-terminal MTDC (Multi-Terminal High Voltage Direct Current) system VSC (Voltage Source Converter) based MTDC meshed grid with different control operations. The results show that the proposed super grid model can provide efficient transmission between generation and load centres and it is also adaptive to deal with variation in power from renewable generation.

Учет и контроль операций по безналичным денежным расчетам. Объектом исследования является ИП Юрина Жанна Александровна. Целью выпускной квалификационной работы проанализировать учет и контроль операций по безналичным расчетам. В Ñ Ð¾Ð´Ðµ проводимого исследования были изучены нормативные и законодательные акты, на основании ÐºÐ¾Ñ‚Ð¾Ñ€Ñ‹Ñ Ð¾ÑÑƒÑ‰ÐµÑÑ‚Ð²Ð»ÑÐµÑ‚ÑÑ учет и контроль операций по безналичным денежным расчетам. На основании учета и контроля операций по Ð±ÐµÐ·Ð½Ð°Ð»Ð¸Ñ‡Ð½Ñ‹Ñ Ñ€Ð°ÑÑ‡ÐµÑ‚Ð°Ð¼ на ÑÑ‡ÐµÑ‚Ð°Ñ Ð±ÑƒÑ Ð³Ð°Ð»Ñ‚ÐµÑ€ÑÐºÐ¾Ð³Ð¾ учета, был произведен сравнительный анализ Ð´Ð°Ð½Ð½Ñ‹Ñ ÑÑ„Ñ„ÐµÐºÑ‚Ð¸Ð²Ð½Ð¾ÑÑ‚Ð¸ организации учета, и проанализирован контроль операций по безналичным расчетам, а также его документооборот. Также были выделены основные проблемы предприятия, предложены мероприятия по совершенствованию и произведен расчет эффективности от внедрения Ð¿Ñ€Ð¸Ð»Ð¾Ð¶ÐµÐ½Ð½Ñ‹Ñ Ð¼ÐµÑ€Ð¾Ð¿Ñ€Ð¸ÑÑ‚Ð¸Ð¹., Accounting and control of cashless transactions. The object of study is the SP Yurina Zhanna Aleksandrovna. The purpose of the final qualifying work is to analyze the accounting and control of cashless transactions. In the course of the study, regulatory and legislative acts were studied, on the basis of which the accounting and control of non-cash cash transactions are carried out. On the basis of accounting and control of operations on non-cash payments on the accounts of accounting, a comparative analysis of the data on the effectiveness of the organization of accounting was made, and the control of operations on non-cash payments was analyzed, as well as its document flow. The main problems of the enterprise were also highlighted, measures for improvement were proposed and the efficiency of the implementation of the attached measures was calculated.

The article discusses the tax control in transfer pricing. Focuses on the features of its legislative consolidation in Ukraine

En las últimas décadas, el suelo urbano de las ciudades latinoamericanas ha venido experimentando expansiones aceleradas, debido al aumento del área construida principalmente en el sector residencial, llevando en muchos casos a disminuir la densidad poblacional en el territorio. Bogotá D.C. es una de las ciudades que experimenta este continuo crecimiento y expansión, llegando a ser considerada como una de las que más rápidamente desarrolla este fenómeno en Colombia y Sur América, alcanzando un incremento de 30 veces su tamaño en 50 años. El fenómeno de “dispersión” de la población y las bajas densidades en los desarrollos urbanos, causa ineficiencia en los sistemas de transporte público, ocasionando que los niveles de prestación de este servicio sean cada vez más críticos, con menor cobertura, y con niveles de calidad inadecuados, generando el círculo vicioso del transporte público. Particularmente, esta situación se observa en las zonas de alimentación del sistema de transporte masivo TransMilenio en la ciudad de Bogotá D.C., donde los porcentajes de ocupación de los buses varían entre 107% y 158%, brindando un nivel de confort bajo y la insatisfacción de los usuarios según las últimas encuestas realizadas. Lo anterior se presenta debido a la suma de limitaciones legales, presupuestales y técnicas y la ausencia de un seguimiento constante del comportamiento de la demanda y de mecanismos de adecuación de la oferta a dicho comportamiento. El presente documento se centra en el diseño conceptual de una estrategia dinámica y flexible para el ajuste de la operación de los servicios de rutas alimentadoras, que contemple la satisfacción del usuario en diferentes atributos de la operación, como son la disponibilidad, confiabilidad, comodidad y seguridad. Para desarrollar tal diseño conceptual, se revisó la teoría del ciclo de la calidad establecido para sistemas de transporte en Europa, cuyo enfoque permite identificar los tres agentes que interactúan en el sistema (Ente gestor, operador y usuario) y sus acciones, las cuales contribuyen a la percepción final de la calidad del servicio. Como producto final se propone un proceso de retroalimentación del comportamiento de la demanda con instrumentos como la encuesta de satisfacción al usuario, la gestión de quejas, reclamos y sugerencias, la encuesta a los conductores y estudios específicos de demanda-oferta, los cuales permiten establecer la línea base de demanda para el rediseño operacional de las rutas alimentadoras, todo en el marco de la teoría del ciclo de la calidad del transporte público utilizado en ciudades europeas. En el mismo marco, como estudio de caso se aplica el proceso de retroalimentación propuesto en la zona de alimentación Usme de TransMilenio, dando como resultado la comparación entre la operación actual y el diseño operacional que contempla la satisfacción del usuario en diferentes atributos del servicio. Abstract. In recent decades, urban land of Latin American cities have been experiencing accelerated expansion due to increased area built mainly in the residential sector, leading in the reduction of the population density in the country. Bogotá D.C. is one of the cities that experience this continued growth and expansion, becoming regarded as one of the most rapidly developing phenomenon in Colombia and South America, reaching an increase of 30 times its size in 50 years. The phenomenon of "dispersion" of the population and the low densities in urban development, cause inefficiency in the public transport systems, causing the levels of provision of this service are increasingly critical, with less coverage, and inadequate levels of quality, creating the vicious circle of public transport. In particular, this situation is observed in the foraging mass transit system TransMilenio in Bogotá D.C., where occupancy rates on feeder buses vary between 107% and 158%, providing a low comfort level and dissatisfaction users according to recent surveys. This occurs because the sum of constraints (legal, budget and technical) and the lack of a constantly monitoring of the behavior of the demand and the application of mechanisms of adaptation supply to such behavior. The present document focuses on the conceptual design of a dynamic and flexible strategy for adjusting the operation of services of feeder routes, by providing user satisfaction in different attributes of the operation, such as availability, reliability, comfort and safety. To develop such a conceptual design was revised cycle theory of quality established for transport systems in Europe, whose approach to identify the three agents interacting in the system (Manager, operator and user) and their actions, which contribute the final perception of the quality of service. The final product is proposed feedback process demand behavior with instruments such as the user satisfaction survey, complaints handling, complaints and suggestions, the survey drivers and specific studies of demand-supply, which let set baseline demand for redesigning operational feeder routes, particularly in the context of the theory of the cycle of the quality of public transport used in European cities. In the same context, as a study case applying the proposed feedback process in the feed zone Usme TransMilenio, resulting in a comparison between the current operation and operational design that provides user satisfaction in different service attributes. Maestría

In this paper we propose to identifie the factors both contributing to and limiting the success of trade measures: the provision of funding, the existence of comprehensive and balanced packages of policy instruments, avoiding over-reliance on one type of control, and policies based on understanding the underlying economics of the situation all featured as factors underpinning success. In general we can say that there are three broad sets of reasons why trade restrictions have been incorporated in Multilateral Enviroment Agreements (MEAs): 1. to provide a means of monitoring and controlling trade in products where the uncontrolled trade would lead to or contribute to environmental damage. This may extend to a complete exclusion of particular products from international trade; 2. to provide a means of complying with the MEA.s requirements; 3. to provide a means of enforcing the MEA, by forbidding trade with non-parties or non-complying parties.