Auxiliary Position Research Articles

SCIENTIFIC APPROACH TO REDUCING THE ENERGY OF THE PARKING RETARDER POSITION OF A SORTING DEVICE WITH TARGET GRAVITY BRAKING OF CUTS

The main disadvantage of a sorting device with target gravity braking of cuts is the necessity to use a powerful parking retarder position. In order to reduce the energy of this position, it is proposed to install an auxiliary brake position on the descending part of the device to transfer there part of the work on regulating the rolling speed of cuts of a certain mass. For the given operating conditions, the required energy of these positions and the optimal design parameters of the sorting device were determined, and recommendations were developed for braking the cuts at the auxiliary brake position based on the results of simulation modeling of the rolling of the design runners. The structural parameters were optimized using the developed mathematical model, where the height of the sorting device is the optimization criterion. The optimization calculations were performed both for favorable and unfavorable conditions of the runners rolling. The results of the simulation modeling of the rolling of the design runners proved that the maximum braking value at the auxiliary brake position (0.74 m e. h.) for the specified operating conditions is provided when braking the cuts weighing more than 34.8 tons. To simplify the process of braking such cuts at the auxiliary braking position, it is proposed to use low-energy retarders whose rated energy is less than the maximum possible braking value at this position. The reason of it is that when more powerful retarders are used at the auxiliary braking position, not only the degree of braking of each cut should be determined, but also the duration of their braking, which to some extent complicates the process of speed control and may require automation of operation of this position. If low-energy retarders UVSK-11 with the rated energy of 0.6 m e. h. are used at the auxiliary brake position, the required energy of the park brake position is reduced by 0.57 m e. h. At the same time, all cuts weighing more than 30.8 tons should be braked at the auxiliary brake position. Based on the studies, it was concluded that the installation of an auxiliary brake position on the descending part of the sorting device with target gravity braking of cuts would reduce capital investments in construction and mechanization, as well as the costs associated with the operation of this device.

Study on Dynamic Characteristics of Long-Span Highway-Rail Double-Tower Cable-Stayed Bridge

The long-span dual-purpose highway-rail double-tower cable-stayed bridge has the characteristics of a large span and large load-bearing capacity. Compared with the traditional cable-stayed bridge, its wind resistance and seismic resistance are weaker, and the dynamic characteristics of the bridge are closely related to the wind resistance and seismic bearing capacity of the bridge. This study investigated the influence of the variations of bridge member parameters on the dynamic characteristics of the bridge and then improved the dynamic characteristics of the bridge. To provide the necessary experimental theory for the research work of the long-span dual-purpose highway-rail double-tower cable-stayed bridges, this paper takes the world’s longest span of the dual-purpose highway-rail double-tower cable-stayed bridge as the background, using the finite element analysis software Midas Civil 2022 v1.2 to establish a three-dimensional model of the whole bridge by changing the steel truss beam stiffness, cable stiffness, pylon stiffness, and auxiliary pier position, as well as study the influence of parameter changes on the dynamic characteristics of the bridge. The results show that the dynamic characteristics of the bridge can be enhanced by increasing the stiffness of the steel truss beam, the cable, and the tower. The stiffness of the steel truss beam mainly affects the transverse bending stiffness and flexural coupling stiffness of the bridge. The influence of cable stiffness is weak. The tower stiffness can comprehensively affect the flexural stiffness and torsional stiffness of the bridge. The position of auxiliary piers should be determined comprehensively according to the site conditions. In practical engineering, the stiffness of components can be enhanced according to the weak links of bridges to improve the dynamic characteristics of bridges and save costs.

Deep2Pep: A deep learning method in multi-label classification of bioactive peptide

Functional peptides are easy to absorb and have low side effects, which has attracted increasing interest from pharmaceutical scientists. However, due to the limitations in the laboratory funding and human resources, it is difficult to screen the functional peptides from a large number of peptides with unknown functions. With the development of machine learning and Deep learning, the combination of computational methods and biological information provides an effective method for identifying peptide functions. To explore the value of multi-functional active peptides, a new deep learning method named Deep2Pep (Deep learning to Peptides) was constructed, which was based on sequence encoding, embedding, and language tokenizer. It can achieve predictions of peptides on antimicrobial, antihypertensive, antioxidant and antihyperglycemic by converting sequence information into digital vectors, combined BiLSTM, attention-residual algorithm, and BERT Encoder. The results showed that Deep2Pep had a Hamming Loss of 0.095, subset Accuracy of 0.737, and Macro F1-Score of 0.734. which outperformed other models. BiLSTM played a primary role in Deep2Pep, which BERT encoder was in an auxiliary position. Deep learning algorithms was used in this study to accurately predict the four active functions of peptides, and it was expected to provide effective references for predicting multi-functional peptides.

Проблема атмосферы у Г. Беме и ее отношение к цифровой культуре

This article is devoted to a relatively new aesthetic concept, the concept of atmosphere. In the second half of the 20th century, due to the overcoming of the understanding of the aesthetic as a field of art and the emergence of the tendency to appeal to sensual experience, the idea that aesthetic perception and aesthetic experience are possible not only in the context of art events, but also in the space of everyday life is becoming increasingly relevant. The aesthetics of atmosphere arises from the aesthetics of everyday life. The first to declare the concept of atmosphere as a separate aesthetic theory was H. Böhme (1937–2022). The immediate predecessors of the concept of atmospheres are the theoretical positions of G. Schmitz and W. Benjamin. The aesthetics of atmospheres explores the states that arise in the process of the relationship between the subjective and the objective factors and in their material, emotional interaction. This article analyzes H. Beme’s concept of atmosphere, as presented by him in his works: “‘Atmosphere’ as a fundamental concept of the new aesthetics”, “Atmospheric Architectures: The Aesthetics of Felt Spaces”, “Architektur und Atmosphäre”. A special place in H. Beme’s aesthetic theory of atmospheres is occupied, first, by the concept of “ecstasy of things” introduced by him, which allows us to speak of the relatively objective nature of atmospheres, and, second, by the problem of the production of artificial atmospheres. Most studies of atmosphere as an aesthetic category consider atmosphere in the context of architecture, urban environment, design, etc. This article attempts to explore the atmosphere in digital space. At present, digital space has already lost its representational and in principle auxiliary position in relation to the human being, and has become a space for the realization of possibilities, the functioning of which was not represented in the human being’s being. The specific possibilities of the digital require a special analysis of the aesthetic, capable of exploring the digital space in its entirety. The article suggests that the concept of atmospheres is a productive way to work with digital space, which is shown on the example of such digital space phenomena as metavelves and ASMR-video. The study showed that the concept of atmospheres is convenient for working with digital space, especially due to the fact that with its help it is possible to carry out successful analysis not only of visual and auditory components (characteristic for classical aesthetics), but also of other ways of aesthetic perception.

소방현장 대응 강화를 위한 법제 개선 방안

Disasters are unpredictable things that do not know when they will occur in our daily lives and cause a lot of damage to the country, society and people. Due to recent climate anomalies and industrial development, disasters occur regardless of place and time. Natural disasters and social disasters, such as typhoons, fire damage, and rain damage due to excessive rain, occur simultaneously. Disasters do not arise from any single cause. Even if it is a natural disaster, the damage is more serious due to the lack of defense and response.
 Therefore, in order to actively and efficiently deal with disasters, the problems of the current legal system must be improved. Firefighting agencies are the first to respond to a disaster scene, especially at a firefighting site. In order for firefighting agencies to perform their duties efficiently, it is necessary to grant authority to strengthen on-site responses to firefighting agencies. In the current legal system, firefighting agencies perform tasks in an auxiliary position rather than having direct supervision.
 Due to the absence of command and supervision rights for field responsiveness of firefighting agencies, it is difficult for firefighting agencies to respond efficiently at firefighting sites. Therefore, in order to strengthen the on-site responsiveness of firefighting agencies, this study analyzed the problems in firefighting-related laws such as the “Framework Act on Disaster and Safety Management” and suggested improvement plans to strengthen the on-site responsiveness of firefighting agencies. In order to strengthen the on-site responsiveness of firefighting agencies, public safety must be secured through the improvement of the current legal system.

MOF-derived Fe based catalysts for efficiently Advanced Oxidation Processes: From single atoms to diatomic and nanoparticles

Sub-nanometer catalysts have drawn great attention based on their superior catalytic activity and extensive application in advanced oxidation processes (AOPs). Nonetheless, the precise regulation of the coordination environment and exploration of the peroxymonosulfate (PMS) activation mechanism remain the focus of research. Herein, we report the preparation of Fe catalysts with diverse sizes, including single atoms (SAs), double atoms (DAs), and nanoparticles (NPs) via adjusting the precursor. Sub-nanometric Fe catalysts exhibit a higher catalytic activity for Bisphenol A (BPA) degradation. It is confirmed that the catalytic activity of the Fe diatomic catalysts (Fe2–N/C) is 2.5 times that of the Fe single-atom catalysts (Fe1–N/C) and 8.3 times that of the Fe-nanoparticle-loaded catalysts (FeNP–N/C). Broad pH adaptation ranges and reusability have also been proved. Based on experimental verification and density functional theory, non-free radical pathways dominate the degradation process of BPA, while free radical pathways are in an auxiliary position, accompanied by electron transfer process. It is found that the synergistic effect of Fe2–N6 sites and pyridinic N adsorption centers contribute to the ultra-high catalytic activity of Fe2–N/C. This work opens up an efficient way for single atom catalysts-based advanced oxidation processes for the efficient removal of refractory organic pollutants.

BSBL-Based Auxiliary Vehicle Position Analysis in Smart City Using Distributed MEC and UAV-Deployed IoT

Smart city enters the new 3.0 era, and Internet of Things (IoT) perform as the urban neural network in smart city. In the industrial areas of smart city, the IoT focuses on industrial applications, such as logistics and environmental monitoring. In this work, an auxiliary position analysis framework composed of IoT and distributed mobile-edge computing (MEC) is proposed to analyze the position of vehicles in the industrial areas of smart city. In the proposed framework, IoT are deployed by multiple unmanned aerial vehicles (UAVs) equipped with uniform linear array (ULA), which receives the signal emitted by vehicles for obtaining the direction of arrival (DOA), and the distributed MEC provides computing and synchronization services to auxiliary positioning. The DOA estimation is a key issue for auxiliary positioning in the proposed framework. To realize DOA estimation with unknown mutual coupling (MC) existing in IoT nodes, a novel block sparse Bayesian learning (SBL) algorithm is developed. In the developed algorithm, the unknown MC existing between sensors in each IoT nodes is first fused with the signal by parameterizing steering vector. Then, a block SBL (BSBL) procedure is presented to perform DOA estimation by using the inherent block sparse structure in the equivalent signal obtained after fusion. Benefiting from the fusion of MC and signal, the developed DOA estimation algorithm does not require a separate estimation of the unknown MC and also does not cause the loss of the array aperture. Based on the DOA estimation information, the position of vehicles in the industrial environment is effectively analyzed through weighted multiple cross-locations. Synthetic data set simulation is carried out to verify that the vehicle positions in smart city can be efficiently analyzed and estimated based on the presented framework and algorithm.

Performance analysis of auxiliary entrainment ejector used in multi-evaporator refrigeration system

• Effect of diffuser angle on auxuiliary ejector performance is identified. • Effect of diffuser angle on auxiliary inlet position, angle and, ER is investigated. • An optimal parameters (θ = 4°, LR = 1.9, and γ = 45°) of the new-type ejector exists. • An optimal operating scheme exists under different evaporating temperatures. In this paper, a numerical method is used to maximize the performance of an auxiliary entrainment ejector used in multi-evaporator refrigeration system developed for refrigerated trucks in tropical and humid climates. The Computational Fluid Dynamics model based on the previous study is developed to discuss the effects of key design parameters of an auxiliary entrainment ejector. The simulation model is validated against experimental data of an R134a test rig. The numerical models agree fairly well with the experiments. In order to maximize the efficiency of the auxiliary inlet, the diffuser angle is considered critically. The influence of diffuser angle on the optimal position and angle of the auxiliary inlet is then discussed. As well, the effect of secondary flow and auxiliary flow at varying temperatures on the efficiency of auxiliary entrainment ejector is analyzed. The main results are given as follows: (1) optimal auxiliary inlet position as well as angle and entrainment ratio depend on diffuser angle, and optimum parameters combination (length ratio of 1.9, inlet angle of 45°, and diffuser angle of 4°) of the new-type ejector exists; (2) with the secondary flow working temperature of −10 °C, the entrainment ratio reaches its maximum value of 0.658, and the corresponding entrainment ratio at secondary inlet is 2.60; (3) the auxiliary entrainment ejector can only function if the auxiliary flow working temperature is between −30 °C to −22 °C; (4) it is best to connect the secondary inlet to the medium temperature evaporator, with the auxiliary inlet to the low temperature evaporator, when using the secondary and auxiliary inlet connections to separate evaporators with varied operating temperatures.

PICTORIAL ELEMENTS OF INDIAN MINIATURE PAINTING

This paper discusses the magnificent contribution of Indian miniature painting as the torch bearer of Indian visual culture for the future generations with transitions and various idioms. It’s Visual imagery raised to paramount importance from the auxiliary position to the religious text. Artist has not imitated from nature but imbibed the spirit of divinity and greater love and passion on Indian culture. Its function is religious as well as decorative. “Horrorvacuue” the desire of filling space is the common characteristics of an Indian is often appears in Indian painting. The articulations of line, colour , space are discussed in this article The Climatic conditions might been allowed the Indian painter to experience unusual color patterns. The deep rooted veneration for religion and nature and to fulfill the taste of his patron. Which made him as a distinct artist in the world forever.

Position Tracking Control of Robotic System with Time-varying Delay and Dead-zone

This paper studies the position tracking control problem of nonlinear robotic system subject to time-varying state delay and input dead-zone. The input dead-zone and unknown external disturbance are regarded as the lumped disturbance and a sliding mode disturbance observer is designed. In order to ensure the stability of the robotic system with time-varying state delay, a position tracking controller based on auxiliary position tracking error functions is designed. Considering the estimated error of the sliding mode disturbance observer, a gain adaptive law is designed to further improve the position tracking accuracy of the system. The stability of the proposed controller is theoretically proved by Lyapunov-Krasovskii function method, and the effectiveness of the controller is verified by comparative simulations. The proposed control method can achieve stable and accurate position tracking of the robotic system with simultaneous time-varying state delay and input dead-zone.

Engendering access to environmental justice in Nigeria's oil producing areas

This article interrogates engendering access to environmental justice in Nigeria's oil producing areas and its connection with poverty and disempowerment of women. Women already suffer from the fact that access to justice for the vast majority of Nigerians is challenging and restrictive. It is discriminatory against women. Access to environmental justice is, therefore, an additional burden on them, and of significant concern to the people in the country's oil producing Niger Delta region. Militant youths, women and communities have protested in diverse forms against the injustice they suffer as a result of oil and gas production in the region. However, the Nigerian State has often responded with brutal repression resulting in deepening environmental insult in the region. The oil producing areas, therefore, suffer a triple jeopardy. First, access to justice remains a huge challenge for the people, including women. Secondly, there is the additional burden that they have to struggle for environmental justice against a State and international oil companies that are complicit in the adverse environmental desiderata, a disproportionate brunt of which is borne by women who, however, occupy an auxiliary position in the struggle. Thirdly, where there is policy intervention by way of environmental "clean up" projects, such interventions hardly face up to the need to involve women in developing and implementing key policies, which means that important issues for women are ignored and women continue to suffer substantive environmental injustice.

Instantaneous equilibrium transition for Brownian systems under time-dependent temperature and potential variations: Reversibility, heat and work relations, and fast isentropic process

The theory of constructing instantaneous equilibrium (ieq) transition under arbitrary time-dependent temperature and potential variation for a Brownian particle is developed. It is shown that it is essential to consider the underdamped dynamics for temperature-changing transitions. The ieq is maintained by a time-dependent auxiliary position and momentum potential, which can be calculated for given time-dependent transition protocols. Explicit analytic results are derived for the work and heat statistics, energy, and entropy changes for harmonic and non-harmonic trapping potential with arbitrary time-dependent potential parameters and temperature protocols. Numerical solutions of the corresponding Langevin dynamics are computed to confirm the theoretical results. Although ieq transition of the reverse process is not the time-reversal of the ieq transition of the forward process due to the odd-parity of controlling parameters, their phase-space distribution functions restore the time-reversal symmetry, and hence the energy and entropy changes of the ieq of the reverse process are simply the negative of that of the forward process. Furthermore, it is shown that it is possible to construct an ieq transition that has zero entropy change at a finite transition rate, i.e., a fast ieq isentropic process, and is further demonstrated by explicit Langevin dynamics simulations. Our theory provides fundamental building blocks for designing controlled microscopic heat engine cycles. Implications for constructing an efficient Brownian heat engine are also discussed.

Помощник-учителят през периода на Българското просвещение и в нашето съвремие

The proposed material is a modest attempt to connect the time of the Bulgarian Enlightening and the role of assistant teacher then with our time now and another ambition of the Bulgarian state to implement in the pre-school and school education the auxiliary position of “educational mediator”. For educational practice, the mediator is primarily intended for specialized work with Roma children and students and their parental communities to ensure their participation in educational institutions. The article also offers the opportunity to apply the Renaissance experience in the training of today's educational mediators, in the same way as the assistant teachers of that time. Their path was predetermined – from assistants they grew into the most famous teachers and scholars of their time.Why do we not take advantage of this experience today?

Improving the Accuracy of Quasiclassical Mapping Hamiltonian Methods by Treating the Window Function Width as an Adjustable Parameter.

Mapping Hamiltonian methods for simulating electronically nonadiabatic molecular dynamics are based on representing the electronic population and coherence operators in terms of isomorphic mapping operators, which are given in terms of the auxiliary position and momentum operators. Adding a quasiclassical approximation then makes it possible to treat those auxiliary coordinates and momenta, as well as the nuclear coordinates and momenta, as classical-like phase-space variables. Within such quasiclassical mapping Hamiltonian methods, the initial sampling of the auxiliary coordinates and momenta and the calculation of expectation values of electronic observables at a later time are based on window functions whose functional form differ from one method to another. However, different methods also differ with respect to the way in which they treat the window width. More specifically, while the window width is treated as an adjustable parameter within the symmetrical quasiclassical (SQC) method, this has not been the case for methods based on the linearized semiclasscial (LSC) approximation. In the present study, we investigate the effect that turning the window width into an adjustable parameter within LSC-based methods has on their accuracy compared to SQC. The analysis is performed in the context of the spin-boson and Fenna-Matthews-Olson (FMO) complex benchmark models. We find that treating the window width in LSC-based methods as an adjustable parameter can make their accuracy comparable to that of the SQC method.

Numerical study on the auxiliary entrainment performance of an ejector with different area ratio

In this paper, an ejector-based multi-evaporator refrigeration system is proposed for the tropical region refrigerated trucks. CFD simulations are performed to study the auxiliary entrainment effect of the ejector operated in air-conditioning - freezing mode. First, the performance of the ejector with various auxiliary hole position in different chambers is investigated. Then, based on the optimal auxiliary hole position of each chamber, the influence of double and triple auxiliary holes on the ejector performance is identified. Next, optimal angle with the optimized auxiliary hole position is determined. Last, the effect of the ejector area ratio on optimal auxiliary hole position, angle and entrainment ratio is evaluated. The main results show that: (1) Optimal auxiliary hole position is 59.5 mm or the length ratio of distance between the inlet of constant-area mixing chamber and the auxiliary hole center point to the length of the constant-area mixing chamber is 1.90, and optimal auxiliary hole angle is 45°; (2) The effect of the auxiliary hole position on the ejector performance is stronger than the auxiliary hole angle; (3) the optimum auxiliary hole position, angle as well as entrainment ratio are affected by the ejector area ratio.

Design, implementation, and estimation of MFCV for 4-different position of human body using FPGA

The motivation behind this article is to demonstrate the precision and dependability of a Field Programmable Gate Array-based implementation of muscle fibre conduction velocity (MFCV) in customary unique constrictions. The framework, leveraging the DSP unit, acquires the bio signals from four different positions of the human body, including Radial Nerve, Ulnar nerve, Auxiliary Nerve, Median nerve. The information derived through Surface Electromyogram (EMG) Electrodes is depicted as a dynamic bitstreams of the signal. The latest bitstreams are subjected to an algorithm. The subjection corresponds to the correlation of the signals from similar muscle nerves, obtained through the EMG electrodes. The whole calculation framework completely works progressively on the Altera Cyclone-V FPGA. This method is better than finding the signal dependence using a silicon resonator due to its cost and tedious design of the sensors. The myoelectric (Electromyographic) signal is recorded by the electrodes set on the four different locations associated with 1550 unique contractions. The in-vivo estimations illustrate that below the equivalent trial states, in 10 test days, the framework uncovers an MFCV mean estimation of 6.60 (±) 0.42 m/s for Median nerve Position, 6.43 (±) 0.33 m/s for Ulnar Nerve Position, 6.54 (±) 0.41 m/s for Radial nerve Position and 7.21 (±) 0.49 m/s for Auxiliary Nerve Position. The values evidence decent dependability of the estimations in an eternal application. The core part of the device being MFCV estimation, upon empirical evaluations with clinical values, shows an accuracy of 97%.

Effect of auxiliary donors and position of benzothiadiazole on the optical and photovoltaic properties of dithieno[3,2-b:2′,3′-d]pyrrole-based sensitizers

Organic dyes used as sensitizers in dye-sensitized solar cells offer endless opportunities for modulation of cell efficiency through structural diversifications. Despite the countless number of dyes developed, structure-property analysis by varying chromophores and their topology in dyes is useful to formulate design principles. Herein, we report six new organic dyes featuring dithienopyrrole (DTP), benzothiadiazole (BTD) and cyanoacrylic acid units. The effect of auxiliary donors such as triphenylamine or diphenylaminofluorene and the position of benzothiadiazole on the optical and photovoltaic properties were evaluated by appropriate design of dyes. Incorporation of additional donor enhanced the spectral response of the dyes by elongating the conjugation length and supplementing the donor-acceptor interaction. Moving the BTD unit from the position between DTP and acceptor (D-D-A-π-A) to a position between the auxiliary donor and DTP (D-A-D-A) altered the absorption as well as electrochemical properties. Theoretical calculations revealed that the later molecular configuration ensures sufficient overlap of HOMO and LUMO and facilitate the charge transfer propensity from arylamine donor to acceptor which is beneficial for light harvesting. Among the dyes, a D-A-D-A dye possessing triphenylamine exhibited highest power conversion efficiency (η = 7.57%). The structure-property relationship is supported by electron transfer kinetics elucidated by electrochemical impedance spectroscopic studies. The best performing dye displayed high charge recombination and sufficiently low charge transfer resistance in the device.

Kinematic modeling and control of mobile robot for large-scale workpiece machining

Safety and reliability are significant in the sense of robotic machining for large-scale workpieces. In this article, a control scheme is proposed to ensure the safe motion of the mobile robot. Screw theory is used to analyze the motion of the mobile robot. The mobile platform with Mecanum wheels can be considered as a mechanism with four driven screws in series. An auxiliary reference position of the mobile platform is calculated based on the kinematic model, and the motion of the mobile platform and robot arm can be decoupled to handle its redundant degrees of freedom. Constant speed control is investigated to reduce the interaction force between the robot and platform. Experiments are conducted on the mobile robotic machining task for a large-scale wind turbine blade. The mobile robot moves steadily and smoothly owing to the constant speed control with an auxiliary target.

Prerequisites of the Development of Applied Sciences in Russia in the 17th – 18th Centuries. The First Attempts to Train Mechanics and Engineers in the 18th Century

The article describes the directions of the development of applied mechanics in Russia in the 17th – 18th centuries and focuses on the first attempts to train specialists in these areas. These are the construction of roads, bridges, fortification and hydraulic engineering constructions, practical ballistics. Water and land means of communications are being improved, the industries that served the army and the fleet are developing, and the first attempts are being made to educate mechanics and technicians. Educational institutions are being opened, in which elements of mechanics are beginning to be taught. However, mechanics occupies an auxiliary position in relation to technology

CONTROLLER DESIGN BASED ON A KINEMATIC ESTIMATOR FOR A 3RRR PLANAR PARALLEL ROBOT DRIVEN BY ELECTRIC MOTORS

The control of parallel robotic manipulator requires feedbacks of all the redundant coordinates and their derivatives. In practice, to have all feedback variables for the controller, a robot needs more sensors than its degree of freedom. These sensors measure not only the actuated joint variables, but also the auxiliary variables, position and velocity of the moving platform. In this paper, a novel method is introduced to estimate dependently generalized coordinates and motion of the moving platform. A kinematic error feedback technique is exploited to ensure the estimated motion converge to the actual motion of the robot.