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This research is directed at the exploration of the possibility of using the power inherent in water distribution networks as a result of flow gradient to serve as an alternative power supply for Impressed Current Cathodic Protection of pipelines The use of pressure, head and flow that is available in water distribution networks as a result of gravity or pump to drive micro hydroelectric generation...
In this study, we characterized the elastic properties of additive manufactured metal alloy before and after the electrochemical corrosion using the line-focused ultrasonic transducer system. The calculation was based on the measurement of the surface Rayleigh wave's velocity. The result showed that the velocity of the surface wave and the Young's modulus had negative correlation with the degree of...
Tattoos, a soft biometrie trait, are gradually being used to identify suspects in forensic science. Based on LAB color space and K-mean clustering, we propose a novel segmentation algorithm to improve the segmentation accuracy of color tattoos. The process consists of three parts. Firstly, we use K-mean clustering and human skin color segmentation in LAB color space to detect the skin area. Then,...
The lithosphere is the most stored reservoir of carbon on Earth. The study of the effects of rock weathering and in the atmosphere provides an important basis for accurate prediction of CO2 in the atmosphere, which is essential for predicting global climate change. One of the main factors that has been neglected in the global carbon cycle study of carbonate weathering carbon sinks is the rate problem...
The article describes a functional structure of the problem-oriented program complex for resource-saving control of basic oxygen steelmaking process in the metallurgical production operator advisor mode. The program complex based on a process mathematical model allows calculating the limit solubility of the refractory phase in the converter slag of a given composition and temperature, assessing the...
Surface damage in power plants causes economic loss and waste of operational time in modifications or repair. The wear is caused mainly by solid particles and water droplets. Erosion and corrosion of protective coatings constitute a number of significant engineering difficulties. “Trial and error” type methodology to improve the materials design is rather expensive, inaccurate and time consuming....
The opportunity to clarify the methods of calculation and regulation of technological power losses by applying iterative method based integrated model state 0.4–35kV wire transmission lines is presented. The method of determining the model parameters and calculation results is presented too. The area of further research is identified.
Accelerated Degradation Test (ADT) is a test conducted under extreme stress conditions to accelerate degradation. In the plasma etching process, the life time of the anodic film deteriorates due to fatigue cracking, wear, and erosion arising from ion bombardment and radical reaction. However, ADT has yet to be studied in relation to plasma stress. A fault tree analysis are performed on plasma corrosion...
In this work we present results, both experimental and theoretical, related to corrosion of intermetallic layers that are formed at the interface between the bond pad and the bond ball. Aluminum smear adjacent to the bond ball leads to an initial crevice. Due to a galvanic corrosion process an oxygen deficit in the crevice might occur. Numerical simulations show that in the absence of oxygen the anodic...
The majority of port facilities are decreasing in durability such as corrosion due to salt damage of concrete structures. Therefore, the importance of compressive strength management and diagnostic technology of underwater structures is increasing day by day. While the development of high-precision test equipment on land has been quite established, on the other hand the test equipment for underwater...
Aspects of mathematical model formation in terms of baking time influence on the resistance to stress corrosion cracking under tension are considered in the article. The approximation of experimental data in the Mathcad environment was carried out. The adequate mathematical models and plots describing the dependence of the applied stress tension and time before cracking on the baking time were obtained.
Chassis plates are mainly used in marine atmospheric environment and play an important role in protecting the internal components from disruption and extending the life of equipment. This paper took coating material (Model: TB06-9+TS70-1) as the test object and studied the main failure mechanism. It was found that Hinderliter model could be the main performance degradation indicators according to...
Material characteristics, environmental conditions and loading characteristics under the time domain features shall be taken into consideration so as to effectively evaluate the reliability of ship grillage structure. Moreover, the method of time-variant reliability serves as an effective approach to solve the problem. In the paper, based on the loading environmental features of ships during the enlistment,...
Intercell bars for copper electrowining collect and transfer the DC current from one cell to the next adjacent cell in a series configuration. Equipotential intercell bars are made of a large continuous copper busbar conductor to receive the cathode currents from one cell, rebalance the potential of the electrodes and split the current to the next cell anodes. The potential balance by the bar itself...
The single-phase grounding fault is the most common fault in the distribution network of resonant grounding. By analyzing the algorithm of arc suppression coil grounding, this paper presents a comprehensive selection algorithm based on mathematical morphology. The proposed algorithm carries out filters preprocessing of the line selection data by using two parallel composite structural elements morphological...
This paper introduces analytical models for accurate prediction of failure probabilities of existing conductors and recommends the optimum time window for conductor replacement at an acceptable failure threshold. The tensile failure probability is determined by solving the limit state equation of the corroded conductor subjected to environmental loading such as wind and ice using Monte Carlo simulations...
Pitting corrosion is one of the most destructive types of metal degradation and it can result in catastrophic failure of components due to transition of pits to stress corrosion cracks under loading. To facilitate the implementation of corrosion prognostics and health management, in paper presents a finite element approach for the simulation of stable pit growth with stress loads through a multi-physics...
With the development of power system and the constant attention to the security of equipment and personnel, fault diagnosis of grounding grid gets more and more attention. In this paper, a new fault diagnosis method for grounding grid based on damped least square QR-factorization algorithm is presented. Firstly, a magnetic field reconstruction method based on the magnetic field method is presented...
To optimize storage allocation in Automated Storage and Retrieval System (AS-RS), it is not sufficient to considering stock-in or stock-out operations individually or separately. In this paper, an optimization model of storage allocation in terms of stock-in and stock-out integration is designed to minimize the energy consumption. Considering the practical issue of bearing corrosion affecting its...
The corrosion protection of petroleum storage tank is important for safety work in petroleum depot. Precise prediction of soleplate corrosion may reflect the security state of a storage tank, and it can provide scientific references to the anti-corrosion and maintenance in safety management. Grey Model GM(1,1) in the Grey Theory, which is programmed by MATLAB, is introduced and applied to predict...
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