Texas Journal of Engineering and Technology

The Effect of Temperature on the Rate of Chemical Reactions

Omonova Maxfuza Sodiqovna — 2022-05-10

Chemical reactions occur at different rates. Some of them happen in a thousandth of a second, while others happen in minutes, hours, days, months and years. It is also known that such reactions can occur quickly and slowly, depending on the conditions, for example, they can be rapid at high temperatures and slow at cold temperatures. The difference between the rates of these reactions can be large. The following article is devoted to the study of the effect of temperature on the rate of chemical reactions.

Main Requirements of the O'zDSt ISO\IEC Standard 17021:2009

Kamolova Muxlisa Khudoyberdiyevna — 2022-05-10

On September 15, 2006, ISO/IEC 17021:2006 Conformity assessment -Requirements for bodies providing audit and certification of management systems In December, on the eve of 2007, the International Accreditation Forum (IAF) and the International Organization for Standardization (ISO) issued a joint communiqué establishing a global two-year transition period for meeting its requirements until September 15, 2008.

Recommendations for the Effective Operation of MercedesBenz Bus Air Filters in Hot Climatic Conditions

Ibrahimov Karimjon I — 2022-05-11

This article is devoted to the regeneration of air filters Mercedes-Benz buses, justified the number of optimal regeneration of clogged air filters. The dynamics of the aerodynamic resistance of air filters is experimentally and theoretically proved, and the second-order polynomials are obtained for the prediction of the change in their resistance by applying the methods of mathematical statistics.

A new approach for internet traffic classification: Artificial Bee Colony algorithm-OSELM

Dhulfiqar Mahmood Tawfeeq Al-Saada — 2022-05-11

IP traffic classification is significant for Internet service providers and other private and public organizations, for example in various tasks such as bandwidth scheduling, network error detection, Internet service quality analysis, pricing for users who use specific Internet applications, tracking Internet traffic data and security for specific government agencies. Online sequential extreme learning machine is a method of online learning solving the problem of observing data of different sizes. However, the input weights and OSELM hidden layer biases are randomly determined. This results in an incorrect classification result. In the proposed method, the data are classified using anonline sequential extreme learning machine algorithm. Certainsoftware based on artificial bee colony algorithm (ABC -OSELM) was developed to select the parameters of the sequential fast online machine learning algorithm. The simulation results show that the proposed method has achieved a 7% improvement in accuracy criteria compared to the base paper.

Issues With the Use of Solar Dryers

Ramazonova Fotima Yorboyevnа — 2022-05-13

This article discusses the issues of identifying and classifying the most efficient options for a solar dryer, the study and analysis of different types of solar dryer appearances and performance processes.

Model and Chattering Free Adaptive Fuzzy SMC for Robotic Manipulator Systems

Maryam Sadeq Ahmed — 2022-05-13

This In recent decades, many researchers proposed fuzzy Sliding Mode Control (SMC) strategies that aim to eliminate the chattering problem in control of Multi-Input-Multi-Output (MIMO) nonlinear robotics manipulator systems. All these methods impose the need to determine the dynamic model of system under control, which is a challenging task in many practical cases. This paper presents a new model free and chattering free SMC method for MIMO nonlinear robotics manipulator systems based on Proportional-Derivative (PD) and fuzzy logic control. Proposed controller combines the robustness feature of SMC, simplicity of Proportional-Integral-Derivative (PID) control and ability of fuzzy technique in function approximation of discontinuity part of traditional SMC. In this paper, PD control is used as equivalent control in order to stabilize the system while adaptive fuzzy SMC is used to handle uncertainty of the system. Lyapunov’s second method is utilised to prove stability of proposed controller. Two different robotic manipulator configurations; two-links with payload and three links robotic manipulator under external disturbance and system uncertainties are simulated to demonstrate the efficiency of the proposed method.

Time Series Analysis of Household Energy Using Recurrent Neural Network

Mohammed Nasih Ismael — 2022-05-13

In this paper we create and compare two time series machine learning model based on recurrent neural network to analyze future energy consumption in a particular location. This model will help to the energy producing authorities to forecast future energy consumption and help them to create a better energy consumption plan. PJM Interconnection LLC (PJM) is a Chinese regional transmission company. It manages an electric transmission line that supplies all or portions of Macau, Beijing, Tianjin, Bengbu, Ninguuo, and Hefei as part of the Eastern Interconnection system.

Modernization of Relay Protection and Automation of Boston 110/35/10 KVL Power Supply, Supplying Pump Station with Power

Siddikov I.Kh — 2022-05-20

This article discusses the problem of developing new protection schemes and the use of digital and microprocessor relays in relay protection systems in substations during the modernization of protective devices of power transformers in the substation 110/35/10 kV Buston, which supply power energy of pump station.

Optimization of the Technological Process and Selection of the Optimality Criteria

Saidova Mukhabbat Khamroevna — 2022-05-20

The most important thing in development of the optimal technological process is to justify the purpose and evaluate the effectiveness of technological operations or its individual elements. Various methods and criteria were analyzed in the article, which, from the point of view of matching optimal solutions at different levels, it is preferable to develop processes from the most general issues to their detail.

Calculation of the Planer Tool with a Glance of Physical Components of the Cutting Process Acting on Limited Contact Areas

Urinov Nasillo Fayzilloevich — 2022-05-20

The article covers the designing of the planer tool considering the physical components of the cutting force acting on limited areas of chip contact and tool durability

Research of the Microgeometry of the Surface of Cylinder Mirror of the Internal Combustion Engine

Barakaev Nusratilla Rajabovich — 2022-05-20

The article covers the determination of optimal parameters of the mirror microgeometry of the cylinder of an internal combustion engine, as well as comparison of the microgeometry indicators of the cylinder mirrors of the internal combustion engine of the domestic manufacturer with the indicators of the world's leading representatives of car factories (Audi, Nisan).

Research of the Contact Voltages Distribution on the Front and Back Surfaces of the Cutter

Urinov Nasillo Faizilloevich — 2022-05-20

The methods for measuring contact stresses (loads) on the working surfaces of the tool are covered and analyzed in the article

Measurement on the Plate-Measuring Machine

Dubrovets Lyudmila Vladimirovna — 2022-05-20

The models obtained by various methods must be compared with a real wheel in order to determine how correct its construction is, and this formed the basis of the article.

The Developed Method for Evaluation of the Oil Spot of Engine Oil of Motor Vehicles by Comprehensive Criteria for Diagnostics of the Technical Condition of Engine Oil

Kholmirzaev Javlonbek — 2022-05-20

A technique has been developed for correcting the frequency of maintenance of an internal combustion engine of motor vehicles according to a complex criterion for diagnosing the technical condition of engine oil. The dependence of the frequency of oil change of motor vehicle engines on the developed complex criterion was determined

Analysis of Tribocouples in Car Shock Absorbers and Hydro Cylinders

Kholmirzaev Javlonbek — 2022-05-20

The article considered an analysis of existing methods for increasing durability (silent block and piston coupling of a shock absorber), as well as other vehicle suspension components. We substantiated the possibility of restoring the working capacity of the silent block and piston couplings of shock absorbers by replacing worn parts with an innovative repair kit, respectively, with conical and cylindrical spring inserts and developing a mathematical model

Methods for network monitoring to detect anomalies in time series

Alaa Abdulhussein Daleh Al-magsoosi — 2022-05-20

The open source RRDtool software solves the challenge of collecting and storing time series data from service networks. However, even an experienced network technician will find it difficult to monitor all relevant service network time series at the same time. The approach is to incorporate a mathematical model into the monitoring application that can automatically detect deviations in the time series. And when we talk about the growing number of models, the choice is difficult, because the chosen model must be compatible with real-time monitoring, in this paper we adopt a new approach which is to integrate the theory of exponential smoothing and intelligent properties in Holt Winters algorithm by using RRDtool as a tool for data collection and representation With real-time schemes, although this technique is not perfect, it is adaptable, effective and successful as a tool for automatic identification of deviant behavior after being trained to identify anomalies through prediction based on past and future steps.

Use of hydropower plants and its main problems

Akmalov Jamshidbek Xakimjon o‘g‘li — 2022-05-22

The use of hydro resources in the article. A number of shortcomings have been addressed and the process has been analyzed. In the process, recommendations have been made to increase energy efficiency.

Estimate of Errors of Processing of Parts from Tough Titanium Alloys

Yuldoshev Mirzobek Nurilloevich — 2022-05-22

The article covers the analysis of components of the cutting errors before choosing the type of control and presents a model of processing error based on analysis of reasons that cause deviation from linear dimensions during machining.

Development of Softplc Module Testing Methodology

Abdullaev Sardor Alisherovich — 2022-05-22

The article covers methodology for testing SoftPLC module included in “AxiOMA Control” CNC system, implemented by creating a package of test programs in the FBD language, and test program algorithm has been developed.

Application of the vacuum method to obtain graphite

Avliyakulov Khayot Nodirovich — 2022-05-22

The article discusses the conceptual requirements for deposition methods widely used in modern microelectronics. The high deposition rate and the atomic energy incident on the substrate during deposition allow these methods to be used to obtain films with various compositions and structures, especially for low temperature epitaxy.