Purpose. To investigate the regularities of reactive species formation during the plasma treatment of multicomponent wastewater from the mining and petroleum industries, as well as to assess their role in contaminant transformation and removal efficiency. Methods. Laboratory experiments were carried out using a specially designed plasma-liquid reactor operating under highfrequency electrical discharge conditions (10-25 kV, 10-30 kHz, interelectrode gap 3-7 mm). The study included determination of the initial physicochemical characteristics of wastewater, including pH, electrical conductivity, total dissolved solids, and concentrations of heavy metals (Cu, Zn, Cd). During plasma treatment, the formation of reactive species (•OH, O3, H2O2) was analyzed, and a kinetic model was applied to describe contaminant removal dynamics and treatment efficiency.

The problem dealt with in this article is the methodology of the key performance indicators (KPI) evaluation of shunting locomotives operation when performing hauling and shunting work. The main parameters affecting the efficiency of rolling stock operation are described, including performance, fuel efficiency and locomotive utilization rate. The algorithm of KPI calculation is proposed, based on the analysis of operational data and statistical methods is proposed. According to the analysis of the trend in cargo transportation over the past 3 years, the need to develop a methodology for evaluating the key performance indicators of shunting work is justified. A comparative analysis of various approaches to assessing the operational performance of locomotives is carried out, their advantages and disadvantages are revealed. Practical recommendations for improving the operational performance of rolling stock are described.

Cylinder liners of an automotive internal combustion engine are subject to significant losses during operation. Severe operating conditions of cylinder liners lead to the appearance of various defects that must be eliminated to ensure the performance of the internal combustion engine. Currently, several methods have been developed for restoring and strengthening the inner surface of cylinder liners of automobile and tractor engines. Analyzing the considered methods for strengthening and restoring cylinder liners, their advantages and disadvantages from the point of view of increasing their durability, it can be assumed that the high-quality restoration of cylinder liners will be provided by a method of applying a coating by centrifugal induction sintering of powder material. Self-fluxing powders were used as baked powder material.

Original calculation schemes of the motor-axle bearing and the distribution of heat flows in the process of heat removal from the surface layer of lubricant to the axle journal of the wheel pair and to the motor-axle bearing liner are proposed, taking into account its middle layer. In order to substantiate the maximum amount of heat released in the motor-axle bearings of a freight diesel locomotive of the 2TE10 series and caused by the action of friction forces in the zone of contact their with the journals of the axles of the wheel pairs, taking into account the theoretical foundations of heat transfer and the accepted assumptions in the specified calculation schemes, analytical dependencies were obtained to determine the quantities characterizing heat removal from the mentioned motor-axial bearings using three flows.

The article is devoted to the use of statistical modelling to solve problems related to the functioning of road transport and mass service systems, such as car service stations. The method consists in reproducing the process under study using a probabilistic mathematical model and subsequent statistical processing of data to obtain numerical characteristics of the process. The purpose of the study is to apply the method of statistical modelling to determine optimal solutions to problems such as calculating the probability of system states, the average number of occupied channels, queuing time and other characteristics of the service station. A station with two service channels and two waiting places is considered as an object of research.

The object of the study is the interaction of the electric locomotive wheel pair and the rail. The subject of the research is the wheel resource. The paper proposes a model for calculating the resource mileage of the electric locomotive wheel pair. The basis of the model is the determination of contact stresses in the wheel pair. The proposed calculation model, when changing the input data, can be used to determine the resource of various wheel pairs and traffic safety, and resource savings.

Оқу құралында әртүрлі қүрылыс материалдары мен өнімдерін дайындауға керек минерал байланыстырғыш заттардың касиеттері және технологиялык негіздері карастырылады. Байланыстырғыш материалдардың қатаю құбылысының физика-химиялық негізі көрсетілген, осы құбылыстарды реттеудің жетілдірілген тәсілдері көрсетілген. Оқу құралында жаңа және композициялық материалдар түрлерінің технологиясы мен қасиетіне ерекше көңіл бөлінеді. Оқу құралы «Құрылыс өнімдерін және бұйымдарын өндіретін» мамандықтағы жоғары оқу орнында оқитын студенттерге арналған.

Монография посвящена проблемам безопасной эксплуатации объектов горнорудных предприятий. Авторы полагают, что безопасное функционирование инфраструктуры горного предприятия возможно только при полной информации о тех геомеханических процессах, которые имеют место при техногенном вмешательстве в природные состояния массивов горных пород и грунтов. Именно изучению этих процессов посвящены комплексы изыскательских работ, важными элементами которого является как текущее наблюдение за состоянием объектов, так и проработка возможных сценариев возникновения неблагоприятных факторов. В разделах книги основное внимание уделено устойчивости породных обнажений, поскольку именно эксплуатационная устойчивость подземных и открытых горных выработок делает возможным функционирование горнодобывающего предприятия. В монографии даны современные представления об устойчивости породных обнажений, влияющих факторах, способах их оценки, классификациях породных и грунтовых массивов.

В пособии описаны испытания и методы определения свойства основных компонентов бетона, а также свойства и расчета состава композиции для изготовления бетона. Излагаются перечень необходимого оборудования, приборов и приспособлений, методы исследования основных свойств бетонной смеси и бетона. Учебное пособие предназначено для студентов строительных специальностей высших учебных заведений, инженеров-строителей и работников строительных лабораторий.

Выполнено в соответствии с Государственным стандартом образования Республики Казахстан. Учебное пособие составлено на основании учебной программы по инженерной графике и начертательной геометрии, утвержденной приказом МОН РК № 158 от 10.04.2012. В учебном пособии изложены фундаментальные основы выполнения чертежей. Знания, полученные при выполнении графических работ, используются при выполнении реальных проектов. Работа подготовлена в КазНИТУ имени К. И. Сатпаева для студентов образовательных программ бакалавриата в соответствии с программой специальностей высших учебных заведений. Рекомендуется студентам технических специальностей, изучающих инженерную графику.