bluuebunny/crossref_metadata_2025 huggingface dataset:
A rapid colorimetric LAMP assay for detection of Rhizoctonia solani AG-1 IA causing sheath blight of rice
Authors: Choudhary Prassan , Rai Pallavi , Yadav Jagriti , Verma Shaloo , Chakdar Hillol , Goswami Sanjay Kumar , Srivastava Alok Kumar , Kashyap Prem Lal , Saxena Anil Kumar
Published: December 2020

Rhizoctonia solani is one of the most devastating pathogens. R. solani AG-1 IA causes sheath blight in rice, maize, and other Gramineous plants. Accurate identification is essential for the effective management of this pathogen. In the present study, a set of four primers were designed viz. RSPG1, RSPG2, RSPG4, and RSPG5 for polygalacturonase (PG) gene, an important virulence factor in phytopathogenic fungi. All four primer sets showed specific amplification of 300 bp (RSPG1F/R), 375 bp (RSPG2F/R), 500 bp (RSPG4F/R) and 336 bp (RSPG5F/R) amplicons. q-PCR detection using each primer sets could detect up to 10 pg of DNA. We also designed six primers (RS_pg_F3_1/RS_pg_B3_1, RS_pg_FIP_1.1/RS-pg_BIP_1.1, and RS_pg_LF_1/RS_pg_LB_1) for PG gene. Further, a colorimetric LAMP assay developed yielded visual confirmation of the pathogen within 45 min of sample collection when coupled with rapid high throughput template preparation method (rHTTP) from infected samples. The sensitivity of the LAMP assay was as low as 1.65 fg/µl of template DNA and could effectively detect R. solani AG-1 IA from diseased plant tissues and soil samples. The LAMP assay was highly specific for R. solani as it did not show any amplification with other AG groups of R. solani and closely related fungal and bacterial outgroups. This study will help in designing an effective point of care diagnostic method for early monitoring of R. solani and thereby planning timely preventive measures against the pathogen.
A general approach to study molecular fragmentation and energy redistribution after an ionizing event
Authors: Erdmann Ewa , Aguirre Néstor F. , Indrajith Suvasthika , Chiarinelli Jacopo , Domaracka Alicja , Rousseau Patrick , Huber Bernd A. , Bolognesi Paola , Richter Robert , Avaldi Lorenzo , Díaz-Tendero Sergio , Alcamí Manuel , Łabuda Marta
Published: December 2020

We propose to combine quantum chemical calculations, statistical mechanical methods, and photoionization and particle collision experiments to unravel the redistribution of internal energy of the furan cation and its dissociation pathways.
Electric field controlled uphill electron migration along α-helical oligopeptides
Authors: Song Xiufang , Bu Yuxiang
Published: December 2020

A systematic study on applied electric field effects (Eapp) on electron transfer along peptides is very important for the regulation of electron transfer behaviors so as to realize the functions of proteins.
New insights on the ESIPT process based on solid-state data and state-of-the-art computational methods
Authors: Laner Jean Nunes , Silva Junior Henrique de Castro , Rodembusch Fabiano Severo , Moreira Eduardo Ceretta
Published: December 2020

Updated computational techniques to investigate the excited-state intramolecular proton transfer (ESIPT) process obtaining theoretical electronic and vibrational properties in the solid-state with high accuracy at a small computational cost.
Radical pair formation due to compression-induced electron transfer in crystals of energetic salts
Authors: Bondarchuk Sergey V.
Published: December 2020

This puzzle illustrates how explosive and non-explosive salts can be separated using pressure-dependence of the cationic charges.
Understanding TADF: a joint experimental and theoretical study of DMAC-TRZ
Authors: Dhali Rama , Phan Huu D. K. Andrea , Bertocchi Francesco , Sissa Cristina , Terenziani Francesca , Painelli Anna
Published: December 2020

TADF offers a promising way to harvest triplets in OLED for improved efficiency. To concurrently optimize the dye inside the matrix, a thorough experimental and theoretical study is presented of a the TADF dye addressing environmental effects.
Thermal conductivity measurements of thin films by non-contact scanning thermal microscopy under ambient conditions
Authors: Zhang Yun , Zhu Wenkai , Borca-Tasciuc Theodorian
Published: December 2020

Accurate thermal conductivity measurements of nanoscale thin-films on substrate samples by non-contact SThM with finite element heat transfer modeling in transition regime and with fitting functions and analytical heat transfer modeling for fast analysis.
Electrochemical Eu(iii) behaviours and Eu oxysulfate recovery over terpyridine-functionalized indium tin oxide electrodes
Authors: Park So Jeong , Joo Min Hee , Hong Sung-Min , Kang Jun-Gill , Rhee Choong Kyun , Lee Sung Woo , Sohn Youngku
Published: December 2020

The Eu element was recovered as EuSO4 over new terpyridine-functionalized ITO by an electrochemical method and luminescent Eu2O2SO4 was obtained by post-thermal annealing.
Porous frameworks for effective water adsorption: from 3D bulk to 2D nanosheets
Authors: Zhang Lan , Fang Wen-Xia , Wang Cong , Dong Hui , Ma Shu-Hua , Luo Yang-Hui
Published: December 2020

The latest progress relating to the development of porous frameworks for water harvesting has been summarized, highlighting design strategies for next-generation sorbent materials.
Effects of active crowder size and activity–crowding coupling on polymer translocation
Authors: Tan Fei , Chen Ying , Zhao Nanrong
Published: December 2020

We clarify a non-monotonic translocation time with increasing active crowder size and reveal a novel activity-induced turnover in translocation direction.
Boosting CO2-to-CO conversion on a robust single-atom copper decorated carbon catalyst by enhancing intermediate binding strength
Authors: Chen Shixia , Li Yuewei , Bu Zhuogang , Yang Fangqi , Luo Junhui , An Qizheng , Zeng Zheling , Wang Jun , Deng Shuguang
Published: December 2020

The hydrogen-bond strengthen the *COOH adsorption and lower the CO2(g)→*COOH energy barrier on Cu–N–C electrocatalyst, simultaneously yielding a high CO FE and TOF.
Artemisinin-passivated mixed-cation perovskite films for durable flexible perovskite solar cells with over 21% efficiency
Authors: Yang Longkai , Xiong Qiu , Li Yanbo , Gao Peng , Xu Ben , Lin Hong , Li Xin , Miyasaka Tsutomu
Published: December 2020

The strong coordination between artemisinin molecules and exposed Pb2+ ions reduces the perovskite crystal's defects and alleviates Pb clusters, resulting in high-performance flexible perovskite solar cells.
Tuning morphology-dependent localized surface plasmon resonance in quasi-metallic tungsten oxide nanostructures for enhanced photocatalysis
Authors: Li Yi-Yan , Zhong Chu-Yao , Li Mei-Xin , Zhang Qiao-Yi , Chen Yibo , Liu Zhao-Qing , Zhang Jin Zhong
Published: December 2020

Tunable localized surface plasmon resonance in quasi-metallic W18O49 was achieved by morphology control and the urchin-like nanospheres showed blue-shifted extinction as well as enhanced photoreduction properties towards Cr(vi).
Identifying breast cancer subtypes associated modules and biomarkers by integrated bioinformatics analysis
Authors: Wang Yanwei , Li Yu , Liu Baohong , Song Ailin
Published: December 2020

Breast cancer is the most common form of cancer afflicting women worldwide. Patients with breast cancer of different molecular classifications need varied treatments. Since it is known that the development of breast cancer involves multiple genes and functions, identification of functional gene modules (clusters of the functionally related genes) is indispensable as opposed to isolated genes, in order to investigate their relationship derived from the gene co-expression analysis. In total, 6315 differentially expressed genes (DEGs) were recognized and subjected to the co-expression analysis. Seven modules were screened out. The blue and turquoise modules have been selected from the module trait association analysis since the genes in these two modules are significantly correlated with the breast cancer subtypes. Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment show that the blue module genes engaged in cell cycle, DNA replication, p53 signaling pathway, and pathway in cancer. According to the connectivity analysis and survival analysis, 8 out of 96 hub genes were filtered and have shown the highest expression in basal-like breast cancer. Furthermore, the hub genes were validated by the external datasets and quantitative real-time PCR (qRT-PCR). In summary, hub genes of Cyclin E1 (CCNE1), Centromere Protein N (CENPN), Checkpoint kinase 1 (CHEK1), Polo-like kinase 1 (PLK1), DNA replication and sister chromatid cohesion 1 (DSCC1), Family with sequence similarity 64, member A (FAM64A), Ubiquitin Conjugating Enzyme E2 C (UBE2C) and Ubiquitin Conjugating Enzyme E2 T (UBE2T) may serve as the prognostic markers for different subtypes of breast cancer.
Modelling plant health for policy
Authors: Jones Glyn , Kleczkowski Adam
Published: December 2020

Plant health is relatively poorly funded compared with animal and human health issues. However, we contend it is at least as complex and likely more so given the number of pests and hosts and that outbreaks occur in poorly monitored open systems. Modelling is often suggested as a method to better consider the threats to plant health to aid resource and time poor decision makers in their prioritisation of responses. However, like other areas of science, the modelling community has not always provided accessible and relevant solutions. We describe some potential solutions to developing plant health models in conjunction with decision makers based upon a recent example and illustrate how an increased emphasis on plant health is slowly expanding the potential role of modelling in decision making. We place the research in the Credibility, Relevance and Legitimacy (CRELE) framework and discuss the implications for future developments in co-construction of policy-linked models.
Optical sensors for power transformer monitoring: A review
Authors: Ma Guoming , Wang Yuan , Qin Weiqi , Zhou Hongyang , Yan Chao , Jiang Jun , Ju Yiguang
Published: December 2020

Power transformers play a vital role in power transmission systems from the energy source to the consumption center. In situ diagnostics of the performance of power transformers provides a variety of benefits to ensure reliable electricity transmission. Immunity to electromagnetic interference, high sensitivity, high insulation as well as small dimensions of optical sensing make it very attractive for applications in power transformer monitoring. This paper presents a critical review of various diagnostic methods for power transformers such as partial discharge, dissolved gases, temperature and other important sensing, and optical detection. The advantages and disadvantages of different monitoring methods are carefully discussed and assessed. Finally, the existing technical barriers and future prospects of optical monitoring methods for power transformers are presented.
Infrared thermography‐based diagnostics on power equipment: State‐of‐the‐art
Authors: Xia Changjie , Ren Ming , Wang Bing , Dong Ming , Xu Guanghao , Xie Jiacheng , Zhang Chongxing
Published: December 2020

As a non‐contact temperature distribution measurement method, infrared thermography (IRT) has emerged as an indispensable tool in condition monitoring and fault diagnosis of electrical equipment based on the absolute and relative temperature values. Manual fault inspection, as an expert‐experiences based evaluation method, has formed a mature technical scheme with a large number of application cases. However, the efficiency and accuracy of manual fault inspection are being challenged by the rapid growth in the number of equipment in power grid. The situation is improving with the advanced of image processing technique. Machine‐assisted fault diagnosis provides a novel method to assist human beings to complete fault diagnosis under the intervention of human prior knowledge. However, the limitations of infrared images bring challenges to image analysis processing especially target detection. In pursuit of automatic fault diagnosis, deep learning algorithms are introduced to achieve target detection in the complex environment. This study reviews the development of IRT‐based diagnostics beginning with the general procedures, objects, and limitations of IRT‐based fault inspection, and then gives an insight into the popular machine‐assisted fault diagnosis as well as image‐based intelligent fault identification. In addition, the future recommendations of IRT are also provided from construction of intelligent infrared detection system, establishment of an open and shared infrared image database and comprehensive utilization of joint visualization diagnosis technology.
Charge transport behavior in gamma‐ray irradiated poly(ethylene terephthalate) estimated by surface potential decay
Authors: Gao Yu , Li Nan , Li Jing , Du Boxue , Liu Ziyang
Published: December 2020

This study reports on the variation in charge transport behaviour of poly (ethylene terephthalate) (PET) caused by gamma‐ray irradiation estimated by means of surface potential decay (SPD) measurement. The 100 µm‐thick PET specimens were exposed to 60Co gamma rays to a maximum total dose of 1000 kGy. The SPD test was carried out to obtain charge transport related parameters via various models, and the effect of gamma‐ray on the transport behaviour was examined. Furthermore, Fourier transform infrared spectrum, gel content, ultraviolet‐visible spectroscopy, X‐ray photoelectron spectroscopy, differential scanning calorimetry and polarized optical microscope were employed to characterize the change in material structure induced by the irradiation. The test results indicated that with the growth in the total dose, the deep trap centre was basically unchanged, whereas the shallow trap centre became shallower. In addition, the trap density tended to decrease. The carrier mobility in PET increased with the total dose, and the charge transport manner conformed well to the hopping model. It is suggested that the formation of oxygen‐based groups from the irradiation induced oxidation reaction tends to encourage the charge transport, while the decrease of amorphous region gives rise to the reduction in trap density.
Search for ways of reconstruction of the gas transportation network to reduce gas deficits in consumers in emergencies in the gas industry
Authors: Vorobev Sergey , Senderov Sergey , Edelev Alexey
Published: December 2020

The article is devoted to the search and identification of possible invariant measures aimed at reducing gas shortages among consumers in the event of emergencies at critical facilities of the gas industry. The study was carried out on the example of the Unified Gas Supply System of Russia and is a logical development of the topic of searching and identifying critical objects of the system. The article presents a list of the most common sections of gas pipelines, the throughput of which is insufficient in the situations under consideration. As measures to reduce gas shortages among consumers in emergencies at critical facilities, the expediency of both a short-term increase in the throughput of the sections and the laying of additional sections of main gas pipelines is shown. Conclusions are drawn on the need to search for such sections of gas pipelines and to apply measures to them aimed at increasing the efficiency of the Russian gas industry in emergencies.
North-east Asia interstate power grid expansion in the conditions of possible economic recession in China
Authors: Trofimov Leonid N. , Trofimov Ivan L. , Podkovalnikov Sergei V.
Published: December 2020

The article considers scenarios of the prospective interstate power grid (ISPG) expansion in Northeast Asia with possible economic recession in China because of COVID-19 and other factors. Features of optimization of new capacities addition of renewable energy sources in the ISPG are considered. A series of computational experiments with variations in the profiles of wind and solar power plants were carried out. The assessment of impact the intermittence of renewable energy power output on the structure of ISPG was evaluated, with taking into account of possible economic recession in China. A comparative analysis of solutions to the problem of optimization of intermittent generation capacity inputs for scenarios with the formation of an energy connection in northeast Asia and its absence is carried out.
Research of mathematical models for minimizing power shortage with quadratic losses in power lines and with using network coefficients (sensitivity coefficients)
Authors: Krupenev Dmitry , Boyarkin Denis , Iakubovskii Dmitrii
Published: December 2020

The article presents an analysis of the models for minimizing the power shortage used in adequacy assessment by the Monte Carlo method. We analysed two models: a model with quadratic losses in power lines and a model using network coefficients (first-order sensitivity coefficients), that are showing the dependence of the change in power flows through power lines on the balance of generation / consumption in the reliability zones. As a result of the analysis, a conclusion is made about the applicability of the investigated models for adequacy assessment in the long-term planning of the development of electric power systems.
On chaotic state indications of time series of failure rate of overhead lines
Authors: Galiaskarov Irek , Misrikhanov Misrikhan , Ryabchenko Vladimir , Shuntov Andrey
Published: December 2020

The accident rate of 500 kV overhead lines (OHL) of a large region on a long time interval is researched. Significant fluctuations in the values of their failure rate (failure frequency) are revealed. The specified parameter was analyzed using the mathematical apparatus of the theory of deterministic (dynamic) chaos. The fractality of the time series of the OHL failure rate was revealed, as well as the positiveness of its maximal Lyapunov exponent, which indicated the chaotic nature of the dynamic process under consideration. The insignificant (less than five years) depth of forecasting the reliability characteristics of overhead lines due to the indicated chaotic state is substantiated. This is an unfavorable factor that reduces the reliability of the reliability estimates of the main grid of power systems.
Prediction of time series of overhead lines failure rate with chaotic indicators
Authors: Zubov Nikolay , Misrikhanov Misrikhan , Ryabchenko Vladimir , Shuntov Andrey
Published: December 2020

The results of forecasting the failure rate (failure frequency) of overhead lines (OHL) 500 kV, presented in the form of a time series with signs of chaos, are presented. Predictive estimates are obtained using methods of singular spectrum analysis, neural and fuzzy neural networks. As an object of singular spectrum analysis, a delay matrix is used, which is formed on the basis of the time series of the failure rate. The prediction was carried out by means of one-step transformations of the initial data. For prediction using a neural network, a direct signal transmission network is used, trained by the backpropagation method. In order to achieve the minimum mean squared error, the training sample contained the maximum possible history. To predict the failure rate by the method of fuzzy neural networks, the Wang-Mendel network was chosen. In all prediction cases, within the framework of one prediction year, 10 thousand "training - prediction" cycles were performed, which ensured the stationarity property of the histograms of the failure rate distributions.
Approaches for short-term photovoltaic energy production forecast in Russian climate conditions
Authors: Frid Semen , Kiseleva Sophia , Lisitskaya Natalya , Mordinsky Alexander
Published: December 2020

Different techniques for short-term energy production by photovoltaic solar parks (PVSP) were considered taking into account specific features of Russian energy market. Based on theoretical simulation using numerical weather prediction results and experimental data it has been shown, that even for low precision techniques their application allows to improve economics of PVSP’s operation. With a decrease in the forecast error by 1.5–2 times, the economic losses due to the grid dispatch schedule deflection decrease by 5–9 times.
K-Nearest Neighbors Algorithm Application in the Electrical Grid States Recognition Problems
Authors: Kulikov A.L. , Bezdushniy D.I. , Osokin V.Yu. , Sevostyanov A.A.
Published: December 2020

One of the ways to improve the reliability of electrical grids is associated with the introduction of complex and resource-intensive algorithms in intelligent electronic devices (IED) that perform the functions of relay protection and automation at substations. Simulation modelling is used to study the features of the protected object functioning and its application makes it possible to take into account the variability of electrical grid states in the formation of IED algorithms, which are characteristic of the analyzed electrical grid section. In addition, this approach makes it possible to use for short circuits detection only those information features that have a high information value in a specific problem of states recognition. Machine learning methods are advisable to use for modern relay protection algorithms implementation. One of such methods is the k-nearest neighbours method. The article substantiates the effectiveness of the method application in comparison with the conventional algorithms on the example of protection of an electrical grid section with a distributed generation source. The reported study was funded by RFBR, project number 19-38-90144.
For the construction of subsystem for power line diagnostic states of distribution networks as a part of AMRCS
Authors: Omorov Turatbek , Koibagarov Taalaibek , Zhanybaev Tilebaldy , Takyrbashev Beishenaly , Boronin Aleksey
Published: December 2020

At present, in order to automate and informative processes in distribution zones (DZ) with a voltage of 0.4 kV, new technologies have found wide application in the form of automated meter reading and control system (AMRCS). However, as part of these information systems, there are no technologies focused on solving diagnostic problems. The report proposes methodological and algorithmic foundations for constructing a subsystem for diagnosing the states of wires of the main lines of DZ. Diagnostic criteria are formulated based on the assessment of the level of their run-out. The research results are aimed at improving the existing AMRCS and increasing the reliability of distribution networks.
Current in lighting wire grounded in each tower determination under short circuit to tower or short circuit to earth escape tower
Authors: Zimin Kirill , Rubtsova Nina , Tokarskiy Andrey
Published: December 2020

The algorithms for short circuit (SC) currents as well as induced in grounded in each tower lighting wire (LW) currents are presented for the case of SC to overhead transmission line (OTL) tower and to the ground passing the tower.
Control of the degradation of the mineral transformer oils hydrocarbon base
Authors: Garifullin Marsel Sh. , Solobodina Yuliya N. , Bikzinurov Azat R. , Giniatullin Ruslan A. , Logacheva Alla G.
Published: December 2020

Currently, the degree of degradation of the oils hydrocarbon base remains outside the field of vision of operating services. The aim of this work was to analyse the process of regeneration of aged mineral transformer oils using adsorption cleaning. IR spectroscopy shows that the hydrocarbon composition of oils undergoes changes during operation. And those changes are cannot be restored. We propose the concept for the control of destruction degree of the mineral oils hydrocarbon base. The suggested criterion based on the IR method may be used when decision is making whether the transformer oil should be replaced with a new one.
Analysis of the reliability of heat supply from hybrid energy source based on WPP and CHPP
Authors: Postnikov Ivan
Published: December 2020

The paper is devoted to the problem of the reliability analysis the functioning of the hybrid energy source based on the wind power plant (WPP) and the combined heat and power plant (CHPP). The main effect of the proposed technology is substituting a part of the fossil fuel used at CHPP (or other heat sources) for the production of electricity and thermal energy. At the same time, CHPP operates according to the heat schedule, i.e. in accordance with changes in the heat loads of consumers. In this regard, the attention in the study is focused on the problem of the reliability analysis of the heat supply (heating) from a hybrid energy source. To assess the reliability of heat supply, one of the main complex reliability index (RI) is used - the availability factor (AF), and the system of equations of a stationary markov process is used as a mathematical model of the states evolution of the studied object. Calculation of AF is made in accordance with seasonal changes in heat loads (annual heat load schedule); the heat storage effect of consumers (thermal inertia) and the factor of a possible decrease in wind speed are also additionally taken into account. Case study is carried out on a test circuit of the hybrid energy source (WPP+CHPP), as a result of which some analytical characteristics are obtained.
Computer models in problems of ensuring electromagnetic safety
Authors: Buyakova Natalia V. , Kryukov Andrey V. , Seredkin Dmitriy A. , Thao Le Van.
Published: December 2020

In the process of the smart grids formation a special attention is started to be paid to the issues of power engineering facilities safe functioning and reduction in their negative impact on personnel and environment. One of the important factors of such an impact is the generation of significant levels of strength of electromagnetic fields (EMF) by high-voltage overhead power transmission lines (OPL). In the context of the electric power industry digitalization, in order to improve the electromagnetic safety of service personnel, development of methods and means for digital modeling of EMF created by power lines of various designs is required, including traction networks of electrified railways. Computer models providing an adequate determination of the OPL EMF can be implemented on the basis of methods and tools designed for determining the parameters of the modes of electric energy systems in phase coordinates, developed at the Irkutsk State University for Railroads Communications. As an example of using these methods, the solution to the problem of constructing pictures of the distribution of EMF in the space surrounding the intersection of a flexible symmetrical conductor and a 25 kV traction network is given.
Investigation of the composition and causes of membrane fouling of reverse osmosis
Authors: Saitov Stanislav , Chichirova Natalia
Published: December 2020

The report shows the results of investigation of the composition of fouling formed during Sheshma river water softening reverse osmosis filter. A research technique is disclosed, which includes energy dispersive spectroscopy and ATR FTIR spectroscopy, atomic force microscopy and scanning electron microscopy. An analysis of the causes of membrane fouling is carried out, the effectiveness of chemical pre-treatment is evaluated.
Experimental studies and correlation analysis of atmospheric factors affecting hexavalent chromium conglomerates with organic materials
Authors: Bilalov M.I. , Ziganshin M.G.
Published: December 2020

Field testing of samples containing hexavalent chromium and organic compounds were carried out, which showed the possibility of intensifying the processes of their heat treatment using solar energy. The correlation analysis between various factors of atmospheric exposure and changes in the state of sam-ples was performed. In the course of the study, an estimate was obtained for the wavelength ranges of the near-UV, visible and near-IR spectrum, within which photo-chemical reactions of hexavalent chromium re-duction are possible. The temperature and hydrostatic pressure influence on the chemical reactions intensity in the sample was also assessed. Based on the data obtained, theoretical pre-conditions of energy efficiency of heat treatment process were formed, which should be verified by subsequent laboratory tests.
Modified sludge-based purification of flue gases produced by thermal power plants
Authors: Khusnutdinova Elvira , Nikolaeva Larisa
Published: December 2020

This paper proposes an adsorption-based method of removing sulfur dioxide from the flue gases produced by the thermal power plant. A power plant waste – chemical water treatment sludge available at Kazan CHPP-1 – was used as an adsorption material. Presented here is the chemical composition of the chemical water treatment sludge for a modified sorption material to be designed therefrom. The new sorp-tion material was trial tested for removal of sulfur dioxide from gases. This resulted in kinetic dependence and adsorption isotherm. The test results were then used to design the adsorber. The economic and envi-ronmental effect of using the chemical water treatment sludge as the sorption material was calculated.
Research on technological unit of wastewater disposal after regeneration of H-cation exchange filters
Authors: Vlasova Alena , Vlasov Sergei
Published: December 2020

АnnotationTechnological installation of waste water disposalafter washing of H-cation filters is quite promising idea of avoiding penalties and reuse of waste water in cycle of thermal power plants (TPP). The development of this unit is based on reactions that occur when mixing several TPP water treatment plant wastes, namely, neutralization and exchange-type reactions. As neutralizing reagent, the sludge of the water treatment plant is used, which consists of CaCO3 by 80%. This method reduces the concentration of sul-phate-containing components in wastewater to a standard level, and also provides neutral wastewater with-out the use of additional purchase reagents.
Method of calculation of 0.4 kV input distribution devices
Authors: Bandurin Ivan , Ivanov Vladimir , Kakurin Alexandr , Kozyrev Igor , Korobov Vladimir , Khaimin Alexey , Trashchenkov Sergey
Published: December 2020

The article proposes an authorial algorithm allowing the selection of the input distribution device. The mathematical model of the algorithm is constructed in the Microsoft Excel environment. An example is given.
Influence of mechanical impurities on the risk of failure power transformer and possible ways reduce it
Authors: Melnikova Olga , Savelyev Vitaliy , Bataeva Vera
Published: December 2020

The report presents the results of evaluating the effect of mechanical impurities on the electrical strength of transformer oil and discusses ways to reduce the risk of power transformer failures due to this factor.
Improving the reliability of UPS Central Asia implementation of FACTS devices
Authors: Khamidov Shukhrat , Tillaev Sunnatilla , Normuratov Bahrom
Published: December 2020

The article analyzes the issues of increasing the reliability, stability, improving the control of power flows in electrical networks in the Unified Power System of Central Asia on the basis of the introduction of the Flexible AC Transmission Systems (FACTS) technology. The solution of the problems of regulation of operating parameters of electrical sistems is considered. An assessment of the economic effect from the introduction of FACTS technology in the energy system of Uzbekistan has been carried out.
Approach for Digitalization of the Technical Systems on Logical Basis
Authors: Bystrov Dmitriy , Yakubova Dilfuza , Xasanova Nafisa
Published: December 2020

In the article is given general approach, which can be implemented for digitalization of technical systems as automation in power sector, production sector and etc. Logical inference model is a basis for formalization of various processes. From other hand process of logical inference is a key for such formalization Proposed functioning is a stage question-answer systems proof’s, where happens to the list an operation and logic output for realization in computer. So many equations of the logic recorded in digital code.
Features of creation and use of effective heat exchangers
Authors: Agzamov Shavkat , Nematova Sevinar
Published: December 2020

The article discusses the features of the creation and use of efficient heat exchanger. Designs of pipes with a developed heat exchange is presented. The procedure for determining the degree of development of the heat exchanging surface, the heat transfer coefficient, and the calculation of the heat transfer equation are given. As a result of creating efficient heat exchangers, three main parameters are used: the pipe outside diameter; the estimated flow rate; the Prandtl number.
Exergoeconomic optimization of solar heat pump systems of heat supply
Authors: Koroly Mexriya , Anarbaev Anvar , Usmanov Alisher , Soliev Kuvondyk
Published: December 2020

In this paper, there is analyzed the results of exergy economic optimization of heat-cooling supply in building by using the solar heat pump system. It is possible to realize a system having high reliability in operation of the system. The solar heat pump system according to the present technical decision has high energy efficiency while ensuring reliability, and is useful as a domestic air conditioning and heating water heater. It can also be applied to uses such as industrial heating and cooling devices.
New technologies of water treatment at heat power plants
Authors: Asretdinova Mukhabbat
Published: December 2020

The main objective of water treatment in the energy sector is the desalination of water. Since, calcium and magnesium compounds are those that can reduce the service life of heating elements of energy enterprises by several times.
Analysis of the influence of the input parameters on the efficiency of the operation of the detander generator unit in the gas network system of the republic of Uzbekistan
Authors: Artyomovich Mukolyants Arsen , Davronovich Buranov Mardon , Vladimirovna Sotnikova Irina , Muminovna Аzimova Munira
Published: December 2020

The article is devoted to the generally recognized dilemma of using secondary energy resources in the transportation and distribution of natural gas. At stations where throttle devices are used, excessive gas pressure as the main component of secondary energy resources for technological processes is practically not used. Currently, the replacement of throttle devices with turbo-expander units is determined by energy and economic efficiency. This is due to the fact that the use of excess gas pressure in the turbo expander both at gas distribution stations and at compressor stations of gas pipelines without preheating has not yet been widely used. Expander-generator technology is probably one of the most effective technologies for reducing the consumption of fuel and energy resources. The combination of expander-generator units with heat pump units contributes to the creation of highly efficient power generating complexes that can generate electricity without burning fuel. Expansion of high-pressure natural gas at gas distribution stations is one of the technologies for generating electricity without combustion. To determine the share of electric energy supplied to the electric network based on the expander-generator set in the gas supply system, an analytical dependence was determined. Based on this, an arithmetic model of the installation with single-stage expander-generator units and steam-compression heat pump units is proposed. All data will be presented in detail in this article.
Basic energy-saving principles at the enterprises of public catering
Authors: Pulatov Abror
Published: December 2020

The main principles of energy saving at public catering enterprises are considered in this article. The main criterion for this analysis is the consumption of electric energy by catering enterprises, which averages 80-90% of all energy consumption. Most of this equipment is non-adaptive and non-automated, its installed capacity is often several times more than the actual required capacity, and the average load is on average 30-60%. In this regard, the research and wide introduction of energy-saving technologies and devices in catering enterprises is an urgent task. The article also analyzes the possibilities of reducing the specific consumption of electricity and the functioning of devices at catering enterprises.
Pole-changing motor for lift installation
Authors: Bobojanov Makhsud , Rismuxamedov Dauletbek , Tuychiev Furkat , Shamsutdinov Khusniddin , Magdiev Khayotullo
Published: December 2020

The Numerous lift installation require two speeds of rotation for the work. One of them is necessary for lifting, and another for exact stop of a cabin at a level of a floor. Now in these installations two speed motors with two separate windings are used. In this paper the opportunity of creation of the highly effective two-speed motor with pole-changing winding for lifts and elevator installations is considered. The industrial test results of motors with such windings are shown. The advantages of motors with pole-changing windings over conventional motors with two separate windings are given.
Mathematical modeling of a heat pump and its operation modes
Authors: Koroli Mehriya , Ishnazarov Oybek
Published: December 2020

The paper describes a mathematical model of the heat pump system of autonomous heat supply. Calculations of the temperature at the outlet of the pipeline and the heat pump are given; heat generation and heater condition.
Research of the dependence of the resistance of asynchronous generators with massive rotors on their design
Authors: Bobozhonov Yu.M , Reymov K. M. , Seytmuratov B.T. , Khakimov T.Kh.
Published: December 2020

The article presents the results of a study of the dependence of the resistances of induction generators with massive rotors on their various designs, based on the experimentally taken frequency characteristics.
Changes in tariff prices for electricity consumption and its impact on the energy system
Authors: Muratov M. , Kadirov K.Sh. , Kushev A.P.
Published: December 2020

Currently, the system of various tariffs on electricity consumption is widely used in almost all countries of the world. There is also a special role of tariffs on the change of modes of the energy system, which directly has its place in the smooth operation of the loading cycle of the system. The article discusses how to reduce the period of support for differentiated tariffs on electricity consumption over time.
The essence of differentiated tariffs and foreign experience in their implementation
Authors: Obidjonov J.O.
Published: December 2020

The article describes the approaches to improving the systems for differentiating electricity tariffs: reducing their regional differentiation; refusal from cross-subsidization by categories of consumers and by reliability; introduction of tariff differentiation by levels of electricity supply reliability.
Sacred architecture in the area of historical Volhynia
Authors: Gnatiuk Liliia
Published: December 2020

This article discusses the genesis and historical development of the sacred complexes of historic Volhyn. Based on historical and architectural analysis, it is presented that sacred complexes of historic Volhynia were built according to the canons of temple architecture, and at the same time they have their own characteristics, related to national traditions and regional features which appeared as a result of the process of forming Christianity as a religion associated with national development in the specific study territory. The results of a comprehensive analysis of historical and archival documents found in the archives of Ukraine, Poland and Russia, as well as field research are presented. Results of system and theoretical research of significant retrospective analysis of canonical, historical and political prerequisites of sacral complexes were generalized. The concept of sacred complex structures throughout ХІ-ХІХ th centuries is suggested in correlation with the change of religious identity formation and differentiation according to religious requirements. Existence of autochthonous traditions and genuine vector of the Volhynia’s sacred complex development, considering the specific geopolitical location between East and West in the area where two different cultures collide with each other has been proved. The work is shifting statements concerning direct borrowing of architectural and stylistic components of architectural and planning structure and certain decorative elements.
Factors affecting modern urban environment
Authors: Giyasov Botir , Giyasov Timur
Published: December 2020

The deterioration of modern urban environment caused by rapid development of megalopolises is becoming increasingly important. The development of modern cities, necessitated by the need to improve the living conditions, results in the creation of new buildings and structures, the development of transport and engineering facilties. As a result, the density of built-up areas, the congestion of transport networks increases, which leads to environmental pollution and complicates the environmental situation in cities. The article is devoted to the analysis of the environement of major cities in Russia. The main factors influencing environmental pollution, characteristic only of modern cities, have been identified. The relationship between energy consumption by various industries and environmental pollution has been established. Based on a comparative analysis of harmful emissions in the most environmentally unfriendly cities of Russia, the role of urban transport in increasing the level of urban pollution is described. The main causes aggravating urban environment are indicated. These include significant high-density development development, which leads to a high concentration of harmful substances that pollute the city.
Depressed spaces as an instrument for transformation of urban areas
Authors: Kurochkina Valentina
Published: December 2020

Recently, more and more often urban abandoned and depressed spaces that were previously used as industrial facilities or temporarily used are becoming the sphere of architectural and landscape transformations. These territories can occupy a significant part of the city. This paper examines the features of the formation of urban planning systems, as well as the impact of depressed spaces on the quality of the urban environment. This paper studies such depressed spaces as abandoned industrial areas and objects of unfinished construction. The paper assesses the impact of depressed spaces, identifies criteria that reflect the nature, scale and features of their impact on the environment, on the safety and quality of the urban environment, as well as their role in the structure of the city as a whole. The principles and features of the formation of such urban depressed spaces, as well as the patterns of their development are revealed. The features of the formation of open public space of urban systems, as well as ways of transforming depressed spaces, aimed at increasing their social significance, integrating them into the general urban development, and improving the ecological and social situation are considered. The paper concludes that the problem of restoration of depressed spaces is very important and urgent today. The creation of a continuous urban tissue is impossible without the reorganization of such spaces, as well as the creation of an integral compositional, functional and communication urban planning system.
Damped vibrations method for measuring the rigidity of a system of movable frames of a current collector on the roof of an electric locomotive
Authors: Smerdin Alexander , Golubkov Anton , Sidorov Oleg , Slatin Anatoly
Published: December 2020

The paper describes the features of using the method of damped mechanical vibrations for express diagnostics of current collectors without removing from electric rolling stock roof. The proposed method is based on preliminary determination of the mechanical characteristics of the system of movable frames of a serviceable current collector in the factory. The paper describes a technique that can significantly reduce the complexity of conducting this type of research, increase the speed of measurement, and reduce the influence of the human factor.
Municipal solid waste management in some countries of the world
Authors: Guman Olga , Krinochkina Olga , Khomenko Victor , Wegner-Kozlova Ekaterina
Published: December 2020

The aim of the study is both an analysis of existing basic solutions and innovations in the field of municipal solid waste management and new developments by domestic authors. The main research method was environmental monitoring in the impact zone of municipal solid waste (MSW) landfills. In the process of monitoring, the properties of the soils of the landfill bases were studied by testing them and further laboratory studies of lithological and mineral compositions, moisture and density, filtration and other characteristics. As a result, the following were established: the dependence of soil water permeability on particle size distribution, lithological, organ mineral compositions and the degree of their heterogeneity; maximum minimum-required thickness of screening soils at the base of MSW landfills in the Middle Urals. The established dependences of the engineering and geological characteristics of soils make it possible to use them as natural impervious screens, which can be successfully applied in other regions under similar conditions. Among the constructive solutions in the field of municipal solid waste management, the developments of domestic scientists, which were tested in the Moscow, Nizhny Novgorod and Sverdlovsk regions, are considered. Some of them relate to environmental protection in the area affected by landfills, while others are aimed at optimizing the operation of such landfills. The optimization technology consists in combining the operation and reconstruction cycles of municipal solid waste landfills within their land allotment. It allows involving previously unused materials into circulation and obtaining insulating material from “old-year” waste.
Innovative aspects of ensuring the environmental safety of hotel enterprises in the Rostov region
Authors: Ekinil Galina , Provotorina Valeria , Petrenko Antonina , Gorgadze Lyubov
Published: December 2020

This study is aimed at analyzing hotel enterprises in the Rostov region and identifying the main approaches to ensuring environmental safety; recommendations for the implementation of environmental innovations in hotel enterprises are proposed, which can significantly reduce the negative impact on human health and the environment.
Features of the functioning of a geographically distributed medical organization in Russia
Authors: Dubgorn A , Svetunkov S , Borremans A
Published: December 2020

The paper describes the process of modeling functional structure of a geographically distributed commercial medical organization, based on a case of specific medical organization in Russian Federation. Based on the reference model of a commercial medical organization functional structure the main, management and supporting functions were analyzed. Based on the analysis and using the Archi enterprise architecture tool the functional structure taking into account the issue of geographical distribution was developed. The result of the research can be used as a starting point for developing a system of business processes as well as information requirements of the geographically distributed commercial medical organization.