bluuebunny/crossref_metadata_2025 huggingface dataset:
Baltic Phytoremediation – soil remediation with plants
Authors: Hogland William , Katrantsiotis Christos , Sachpazidou Varvara
Published: November 2020

The project Baltic Phytoremediation (BAPR), an implementing project of the Interreg South programme, aims to raise cross-border awareness about the availability of green phytoremediation technologies to remove environmental pollutants from soil or water, such as oil, industry-related contaminants, hazardous substances, heavy and toxic metals, nutrients and microplastics, through new arenas of cooperation that focus on circular economy approach. Contamination of land and soil increases and is a serious concern around the Baltic Sea region but further worldwide. The most common remedial technologies for related to the clean-up of soil is excavation, removal and disposal to a contained landfill. Therefore, heavily contaminated soils in landfills, can in some instances, mixing with another disposal of hazardous materials. In the Kalmar, a region of south-eastern Sweden, on the Baltic Sea, the glass waste dumps are removed in such old fashion way with no contribution towards the Circular Economy. The best available remediation strategy is soil washing strategy, an ex-situ technology with a chemical additive application to remove contaminants from the soil and wastewater. Recently, many studies have been carried out encouragingly the phytoremediation processes in different plant species. For instances, food crops, sunflower and Indian mustard are considered as the best plants for phytoremediation, as they have a role in phytoextraction of heavy metals. Phytoremediation research has gained the interest of the scientific society and governments over the last two decades, leading to the development of urban greening and ecology national parks. Orrefors park is one of the largest innovative urban site parks in Sweden with ecologically, socially and economically sustainable way with phytoremediation. The present project aims to explore the combination of phytoextraction with biomass generation and commercial utilization as an energy source, using the ash (bio-ore) that increase energy efficiency and reduce carbon emissions. The project includes pilot cases using innovative plant-based phytoremediation methods that cleaning of the contaminated soil.
On the possibility of growing vegetables and fruits on the lunar base
Authors: Moroz Angelina , Cheremisin Alexey , Meshalkin Valeriy , Zhuchenko Alexander , Kosolapov Vladimir , Semenova Natalia , Davydov Vadim
Published: November 2020

The necessity of studying the Moon as an important source of nuclear fuel for nuclear power plants is considered. The work takes into account the geomorphological conditions of the celestial body and the basic biological needs of man. Of particular interest is the problem of fruit and vegetable production on the lunar base. This is necessary to provide the inhabitants of the lunar base with vitamins. In addition, plants convert carbon dioxide into oxygen and create an additional comfortable psychological environment. Experiments carried out in space have confirmed the possibility of growing fruit on the International Space Station (the harvest was more than 15 kg of tomatoes and 6 kg of red pepper). Taking into account the experimental results on growing vegetables on the International Space Station, a simulation of the structure of the lunar base was carried out. The strength and resistance of the structure to various influences have been calculated. Areas for planting agricultural crops have been determined, a possible harvest has been determined and the improvement of conditions for human habitation at the lunar base has been substantiated.
Effect of biochar on the lead mobility in Haplic Chernozem
Authors: Burachevskaya Marina , Minkina Tatiana , Zamulina Inna , Fedorenko Aleksei , Kalinichenko Valery , Lobzenko Ilia , Sushkova Svetlana
Published: November 2020

The determination of mobile Pb compounds in soil is the most important environmental task, due to their sorbtion by plants and migration to other adjacent mediums. The biochar is widely known as an effective for contaminated soil remediation. The aim of the research was to study the effect of biochar remediation on the Pb mobility in soil under model contamination conditions. Haplic Chernozem was artificially contaminated with Pb nitrates at rates of 5 and 10 maximum permissible concentrations (32 mg/kg). Biochar was added in doses of 2.5% and 5% of the soil mass. Loosely bound compounds include exchangeable, complex, and specifically sorbed metal. The largest increase of metal exchangeable forms was observed at a pollution dose of 320 mg/kg (up to 16%). When carbon sorbent was introduced noticeable changes in the content of loosely bound forms occurred. Pb exchangeable forms decreased by 3-10%, complex forms - by 4-13%, specifically sorbed forms- by 4-12%. The highest efficiency of sorbents has been demonstrated by biochar at a dose of 2.5% in the soil contaminated with 160 mg/kg of Pb and at a dose of 5% under contamination of 320 mg/kg of metal.
The LED phyto lighting for improving the environmental friendliness of growing and productivity of lettuce varieties with red and green leaves
Authors: Proshkin Yuri , Semenova Natalia , Smirnov Alexander , Chilingaryan Narek
Published: November 2020

The intensively developing area of modern phytophysiology is the ecological plants physiology, which important section is the ecology of photosynthesis, by which we understand the intensity and photosynthesis productivity dependence on environmental factors, primarily on optical radiation. The urgent problem of growing plants under artificial conditions is to increase energy efficiency, reduce energy intensity and degree of environmental impact. Using LED irradiators with the function of controlling the spectral composition and optical radiation power, it is possible to increase photosynthesis efficiency and vegetable crop productivity in greenhouses. The comparative study of the effect of sodium lamp radiation and LED irradiators with different spectral composition on the growth and productivity lettuce varieties with red leaves (Anthony, Lolo-Rossa) and with green leaves (Levistro, Lifli), was conducted. The research results showed the different susceptibility of lettuce varieties to the spectral composition of radiation. For the Anthony, Levistro and Lolo-Rossa lettuce varieties, LED radiation application provided the positive effect on plant productivity (8-20%) compared to sodium lamps, and simultaneous reduced in energy consumption of the irradiation system by 40 - 50%. Diodes emission increase in the blue region of the spectrum had a significant positive effect on the synthesis of anthocyanins in the culture of lettuce varieties with red-leaves, compared to sodium lamps. For these varieties, a variable irradiation regime is necessary with a change in the spectrum and increase in the proportion of blue radiation towards the end of growth.
Modified soil surface temperature forecasting method for automated data collection systems
Authors: Bolotov Andrei , Shein Evgeny , Kokoreva Anna , Shishkin Konstantin , Kozhunov Andrei , Ezhelev Zakhar
Published: November 2020

There are presents a developed method for predicting temperature of soil surface for next 24 hours with using data of air temperatures at height of 2 meters. The proposed method is a modification of the Mikhalevsky method, recognized in agrometeorology when predicting radiation freezes. Only dry-bulb thermometer temperature data and relative air humidity are available for application in automated systems. We have therefore obtained formulas for the calculation of dry thermometer temperature. A separate study was to test the simplified formula for calculating saturated vapour pressure above water in the temperature range 0-60 °C. The study showed the complete correspondence of the saturated vapour pressure above water value calculated by different methods in the range 0-60°C. The relative error in the given temperature range is not exceed 0.35%. Thanks to obtained equations, the value of dry-bulb thermometer temperature for the first decade of May 2020 was calculated. The temperature and humidity of the air were measured by the automatic station every hour, and the value dry-bulb thermometer temperature were obtained from psychrometric tables. The absolute error in the calculation of value dry-bulb thermometer according to the proposed formulas do not exceed 1°C in the temperature range 0-16°C.
Digital technologies for efficient farming
Authors: Mironkina Alina , Kharitonov Sergei , Kuchumov Alexey , Belokopytov Alexey
Published: November 2020

In modern conditions, agricultural producers must develop in digital technological formats, attract investment and highly qualified personnel, and work to improve the competitiveness of agricultural products and labor productivity. Using the example of agriculture in the Smolensk region, we consider options for using modern digital technologies that will lead to increased efficiency and competitiveness of enterprises. The project of a digital agricultural platform in the Smolensk region is proposed.
Chemical Assessment of Different Landfill Leachate in Nepal
Authors: Adhikari Bikash , Parajuli Anmol , Raj Manandhar Dinesh , Nath Khanal Sanjay
Published: November 2020

Leachate analysis is a vital aspect of landfill operation & management, but limited studies have been conducted in Nepal in this regard. The study focuses on the chemical assessment of leachate’s characteristics of 4 different landfill sites in Nepal in the year 2019 among which 3 are operational and 1 closed, and their variation due to age, functionality, seasons, and feeding amount and waste composition. The data of leachate samples at two months’ interval was collected and assembled into 4 seasons viz. pre-monsoon (Mar-May), monsoon (June-Aug.), post-monsoon (Sep-Nov), and winter seasons (Dec-Feb.) of Nepal using Principal Component Analysis. One-way ANOVA tool is used to analyze data acquired from laboratory. Gradual increase of pH from pre-monsoon to winter seasons and as per age was observed. Amongst metals and heavy metals, the concentration of Fe descended from pre-monsoon to winter. Other metals like Ni, Pb, and Zn were detected in functional, and intermediate aged landfills. For old LFS, the concentrations of Fe, Cu, Cr, Hg, Ni, Pb, Cd, and Zn were lower. H2S and NH3 were high in intermediate than in mature site without seasonal variation. The chemical assessment generates useful data to construct treatment plants.
Investments to Develop Business Models and Projects in the Circular Economy
Authors: Atstaja Dzintra , Uvarova Inga , Kamilla Kambala Darta , Alberte Viktorija , Stokmane Kate , Gegere–Zetterstroma Astrida , Kraze Sandra , Zapletnuka Galina
Published: November 2020

The development of a sustainable economy and the efficient use of resources are now playing an increasingly important role in the circular economy. Unlike the linear economy, the economy contributes to keeping the value of products, materials, and resources in the economy as long as possible, while at the same time reducing both waste volume and raw material consumption and their environmental impact. The topicality of the research is illustrated by the limited amount of natural resources, climate change and sustainable economic growth, which is pursued by both countries and companies. It is in the economic interest of society as a whole to use existing resources in the best possible way. In addition, the introduction of the circular economy is expected to open up broad opportunities for economic growth for both businesses and consumers. The transition to a circular economic business model requires investment. Funding can be raised through different types of projects, but there is little or no information available in the public area about where and how to obtain financing for circular economy–related projects and what are the general benefits for the company from environmentally–friendly activities.
Classification and solid municipal waste unauthorized landfills reclamation methods
Authors: Penezeva Daria , Smirnov Yuriy , Gorynova Tatiana
Published: November 2020

Due to the rapid production volume and consumption increase, the disposal of municipal solid waste (MSW) problems appeared. In Russian Federation stocktaking municipal solid waste accumulation objects close municipal waste landfills, building incineration and waste processing plants become a hot-button issue, which is one of the significant points in a national program «Ecology». Already formed illegal MSW landfills recultivation problem as well attracts wide attention. Nowadays, a recultivation system takes a long time for reclamation method choice, finding the contractor to perform this type of work. In this time, pollutants penetrate deep into the soil and pollute underground water horizons harming the population health as a result. It is proposed to adopt new definitions of the unauthorized landfill, cluster garbage, and focal Cluster garbage at the Federal level to simplify the system. And also divide those responsible for carrying out measures for liquidation and/or reclamation at the Federal, regional and local levels by category. The necessary recultivation method should be selected based on these results. This unauthorized dumping ground separation method can simplify the existing reclamation system in use, approval of technical tasks for remediation. Furthermore, the proposed classification does not require huge financial investments and save time when conducting procurement procedures. The work was carried out with the support of the center for collective use of the Saint Petersburg Mining University.
Vegetation engineering structure for heavy metals absorption
Authors: Avdeenkova Tatiana , Makarova Anna , Zdanov Pavel
Published: November 2020

The treatment of contaminated water is a pressing issue. As a solution it is proposed to use a biological engineering construction with the aquatic vegetation - a bioplato. The process of water purification takes place at the expense of the natural capacity of a number of living organisms and plants to transform and absorb contaminants [1]. The phytoremediation method helps to extract heavy metals from water and makes it suitable for consumption and use. However, in order to be most effective, it is necessary to choose the planting method and optimal environmental conditions. Therefore, several types of bioplato were created and tested during the experiment: with different planting methods (bare root, container grown) and in the presence of microorganisms (Pseudomonas fluorescens and Rhodococcus erythropolis).The contaminants were water-soluble salts of lead (II) acetate and cadmium chloride. Iris pseudacorus and Typha gracilis were selected for the experiment, as the plants are capable of significant heavy metals accumulation. The sampling was carried out according to GOST R 56237-2014 «Drinking water. Sampling at water preparation stations and pipeline distribution systems» and GOST 31861-2012 «Water. General requirements for sampling». The samples were analyzed using an atomic emission spectrometer with inductively bound plasma iCAP 6300 Duo.Studies have shown that the purification rate of plants in both planting methods is quite high - more than 92 %. In bare root samples, purification is more efficient (99% in the solutions with the cadmium ions concentration 20 times above the threshold limit value (TLV). The use of microorganisms contributed to the reduction of Pb2+ absorption by 18% in the bioplato with bare root planting method. However, a bioplato with container grown planting method in the presence of micro-organisms is 8,7% better at purifying water from Cd2+ ions
A hybrid personal vehicle designed and developed as an alternative to traditional transport
Authors: Dominguez Mateo , Cabrera Danly , Diuldin Maksim , Krasnoshchekov Viktor , Rud’ Yuriy , Bykova Natalia
Published: November 2020

These studies can be attributed to design and construction a hybrid personal vehicle, which is based on the use of restored batteries of the following type hybrid car. The developed vehicle has a speed that depends on the size of the transmission system elements: the wheel speed is 24.07 km/h, the drum speed is 2.82 km/h. The battery life obtained by calculation is 62 minutes, and the average time obtained in road tests is 30.5 minutes, the difference between these times is due to the use of recycled batteries. It was also found that the inclination of the road on which the vehicle is moving affects the efficiency of the batteries Using such transport, we will have health benefits as well as reduced emissions of pollutants into the environment. These reasons should be of great importance when choosing mobility system within cities. It has been established that the vehicle complies with the established regulations for private motor vehicles in force in the city of Cuenca. Such personal vehicle, powered by a treadmill and equipped with an electric engine, was proposed as a new alternative to mobility in the city.
The potential of agrivoltaic systems in the conditions of southern regions of Russian Federation
Authors: Kostik Nikita , Bobyl Alexander , Rud Vasiliy , Salamov Islam
Published: November 2020

The aim of this research is to analyze the potential of agrivoltaic systems (AV) on the territory of Russian Federation. Two configurations of AV systems with 3.2m and 6,4m spacing between photovoltaic (PV) arrays were investigated and on the 4m distance above the crop field. The simulation was performed on the 1 ha of sugar beetroot/lettuce crop field as the most suitable vegetables for shading conditions. The simulation was performed in the conditions of Krasnodar region with average annual solar insolation at 4,20 kWh/m2. Net Present Cost of the agrivoltaic system with minimal 3,2m spacing between the arrays is 558277 $US and cost of energy of this configuration is 0.7$US/kWh. Net Present Cost of the agrivoltaic system with 6,4 m spacing between the arrays is 424216$US and Cost of energy is 0,723$US/kWh. Assuming the reduction of sunlight by 30% from 3,2m spacing and by 10%-20% from 6,4 spacing, expected yield of crops is supposed to be 70%-80% of normal yield. Using agrivoltaics for combined use of land allows increasing the productivity of agricultural land by 45%-70% according to Land Equivalent Ratio. With creation comfortable conditions of agrivoltaic development, such systems can have huge impact on the rural off-grid electrification, creating autonomous renewable source of energy.
The method of agricultural lands conditions determined on basis of electromagnetic separation results for cereal crops and herbal flour
Authors: Logunov Semen , Denisov Roman , Rud Sergey , Meshalkin Valeriy , Zhuchenko Alexander , Kosolapov Vladimir
Published: November 2020

In article the appearance reasons of metal different forms elements in assembled crop of cereals or herbal flour are considered. It’s noted that these elements are almost not extracted from agricultural products by screening, sorting by weight, etc. The different methods (magnetic, nuclear-magnetic, X-ray, etc.) for presence determined of metal particles in this product with elative concentrations determined. A method is proposed which on basis of electromagnetic separation of these products allows us to establish of agricultural land pollution state of different foreign elements.
Investigation of the dustiness of various zones of a metropolis and a set of measures to reduce the negative impact of dust on living organisms
Authors: Grevtseva Anna , Diuldin Maksim , Savchenko Ivan , Meshalkin Valeriy , Zhuchenko Alexander , Druzhinina Galina , Valov Anton
Published: November 2020

One of the negative factors that affects human health is dust. Particularly high dust exposure in megacities. There are no unambiguous approaches to solving this problem. A lot depends on the geographical location of the metropolis. Therefore, for each city, it is necessary to conduct personal research on the situation with the formation of dust from various objects in the climatic conditions of the city. In addition, the composition of urban dust is complex, which depends on many factors. In the study, it is necessary to determine the main sources of dust and the possibility of reducing their activity. It is also necessary to establish the nature of the medium (e.g. dispersion system, etc.) in which dust is present. An important point is the chemical composition of the dust. It is especially important to know about the presence of dangerous chemical elements or radioactive particles in it. The paper shows that wind flows on the one hand contribute to reducing the level of dust, on the other hand, when it is polluted, they sharply worsen the environmental situation. In modern cities, a decrease in green spaces, especially trees, is planned. This fact also needs to be considered as one of the options for reducing dust load. Special attention should be paid to the methods of rapid monitoring of the air environment in real time. Their use will help in time to take the necessary measures to block dust sources.
Research and Improvement of Calculation Method of Flow Pressure in Mechanical Recovery Wells
Authors: Qingrong Xu
Published: November 2020

This paper takes the flow pressure of oil recovery wells in polymer flooding blocks in the past two years as the research data, and conducts field test research based on the analysis of test principles and technical indicators of the equipment. By taking the oil wells at the actual static pressure measurement points as the research object, the author compares the flow pressure of the static fluid with that calculated by the low-pressure test data management and analysis software so as to analyze the rationality and data modification method of the formula. By giving full play to the role of the data of the flow pressure and working liquid level in the dynamic analysis and development program preparation, this paper formulates a reasonable working system for mechanical recovery wells, thereby helping to ensure the sustainable and stable production of oil fields.

The low-pressure test team is responsible for the test of the indicator diagram and working liquid level of the oil well in the polymer flooding block. Comprehensive data such as the indicator diagram, working liquid level, depth of the middle layer, pump depth, depth of pump inlet, and casing pressure, as well as comprehensive water cut are imported into the data management and analysis software, which are used to calculate the flow pressure of the oil wells.
Research on Optimal Scheduling of Home Energy Management System Based on NSGA III Multi-Objective Optimization Algorithm
Authors: Han Ninghui , Li Fei , Chen Songsong , Zhang Kai , Feng Jian
Published: November 2020

With the rapid development of smart grid, more and more scholars pay attention to the Home Energy Management System (HEMS). In order to reduce the user’s electricity cost and improve the user’s electricity comfort, this paper proposes a multi-objective optimization strategy of HEMS based on NSGA III multi-objective optimization algorithm. First of all, this paper designs the basic structure of the HEMS, and builds the temperature-controlled load model, the uninterruptible load model, the photovoltaic power generation model and the battery and electric vehicle model. Then, the improved NSGA III multi-objective optimization algorithm is used to solve the model, and the working state of the schedulable load and the output power of the photovoltaic system are obtained in each period. Finally, the simulation results show that the scheme can effectively reduce the user’s electricity cost and improve the user’s electricity comfort. At the same time, the proposed optimal scheduling strategy can also achieve the optimization goal of the HEMS, which proves that the strategy can provide the safe and reliable optimal electricity consumption mode for the home.
Mineral Content Conversion by Piecewise Polynomial Truncated Singular Value Decomposition Algorithm in the Context of Formation Element Logging
Authors: Yi Qifan , Wang Yachun
Published: November 2020

In spite of diverse types of elements and minerals in the stratum, there are only a few kinds they are mainly concentrated, thus the key to element-mineral conversion lies in the quantitative relationship between main elements and main minerals, which task, however, is challenged in practical logging. Firstly, the element types detected by logging tools are fixed, while the mineral types vary in different regions, which makes it difficult to determine the mineral type merely from logging data accurately. Secondly, the mineral types are generally more than the element types detected in the stratum, leading to a multiplicity of the conversion results. Therefore aiming to solve such challenges, this paper establishes a reasonable conversion relationship between the element and mineral, and ultimately attains relatively precise results through certain mathematical method, i.e. piecewise polynomial truncated singular value decomposition (PP-TSVD) algorithm that eliminates “small” singular values of the ill-conditioned conversion coefficients matrix, and meanwhile makes a superimposition of the effective components in the “small” singular value spectrum in the solution of the TSVD method, which greatly reduces the mean square error of the solution, so as to improve the accuracy and reliability of the solution. In addition, PP-TSVD method can determine either the mineral content of single mineral or diversified types, on condition that the known element types are not less than the mineral types to seek. When mineral types are numerous, the integration of some types into one mineral is imperative in order to establish suitable conversion coefficients. In this paper, based on previous studies and the #JD1 well data measured by ECS logging tool, the PP-TSVD method is employed to study the calculation and conversion between the element content and mineral content.
Study on attenuation coefficient characteristics of the in-seam seismic wave in fault and collapse column
Authors: Yuguang Lian , Jinshan Wei , Wen Li , Yang Jiao , Wenwu Dou , Jianghua Li , Ziyu Li , Zhichao Ma , Guoku Wang
Published: November 2020

Various types of geological structures exist in the working face of coal mine stope. Failure to identify the structural development in advance could defer the timely implementation of reasonable management measures, which may eventually affect production safety and connectivity. As a matter of fact, fine detection and interpretation problems of in-seam seismic wave caused by different types of geological anomalies such as faults and collapse columns can exist simultaneously in the working face of mining. In view of these problems, forward modeling research of three-dimensional seismic wave fields on geological models with fault and collapse column are carried out in this study. Meanwhile, in combination with the imaging results of in-seam seismic wave attenuation coefficient of the exposed fault and collapse column, the characteristics of in-seam seismic wave were analyzed. Following comparative analysis, we found the attenuation coefficient anomaly of the fault is generally banded and weakens at both ends of the fault. The attenuation coefficient of the collapse column presents as an irregular ellipse. The energy of the smaller collapse column has a relatively small attenuation, while the energy of the larger collapse column shows a significantly obvious attenuation.
Research and Application of Hydraulic Strengthening Technology in Excavation Face of Wangpo Coal Mine
Authors: Zhang Hongjie
Published: November 2020

In order to effectively solve the problems of low pre-drainage efficiency, long pre-drainage time and slow tunnelling speed under the condition of broken coal seam in Wangpo Coal Mine, the test and application of ultra-high pressure hydraulic slitting pressure-reducing anti-reflection technology in 3310 transportation and excavation face. According to the analysis of the amount of cuttings, the effect of gas drainage and the extraction radius, the radius of the slit is 1.46∼1.61m, the flow rate of single hole drainage can be increased by 1.5∼5.5 times, and After pre-draining for 7 days, the pre-drainage holes arranged at a pitch of 5 m at the bottom of the hole can be drawn to the standard. The results show that the ultra-high pressure hydraulic slitting technology can effectively improve the coal seam pre-drainage effect, greatly improve the gas drainage efficiency, shorten the gas drainage time to the standard and increase the coal roadway excavation speed by 35%. In addition, the hydraulic slotting technology can increase the effective influence radius of the drainage hole and reduce the amount of pre-drainage holes.
Analysis of direct carbon footprint of residents’ consumption in Inner Mongolia Autonomous Region
Authors: Jiang Lina , Li Qingwan , Zhang Wangchen , Lu Lijia , Li Jinhua
Published: November 2020

This paper makes an in-depth study and analysis of the direct carbon footprint of residents’ consumption in Inner Mongolia Autonomous Region based on the IPCC method and the decomposition model of the Logarithmic Mean Divisia Index (LMDI) from 2000 to 2016. The results show that 1) The overall consumption of urban residents and the direct carbon footprint per capita in Inner Mongolia Autonomous Region from 2000 to 2016 were much higher than that of rural residents. 2) The consumption of residents was closely related to the energy structure, and coal, heat and electricity consumption occupied the main position. 3) According to the analysis of the LMDI decomposition model, the energy structure factors contributed negatively to the direct carbon footprint of residents except 2003-2006. 4) Energy efficiency and economic development are important factors to stimulate the direct carbon footprint of residents. Finally, we provide reasonable suggestions for residents’ consumption, energy saving and emission reduction.
Design and Simulation of Multi-nozzle FDM 3D printer for fabricated Solar thin-film cells
Authors: Zhang Xiuxia , Chu Jinquan , Wei Shuyi
Published: November 2020

In order to widely realize the personalized use of solar thin-film cells in every family, save costs and generate clean energy, our team wants to fabricate a 3D printer of solar thin-film cells. The solar film cells were 3D printed fabrication by FDM3D printer would improve their performance as battery. In this paper, for fabricate P nano-diamond/ZnO solar film cells the hot bed and nozzle of 3D printer were designed to achieve 3D printing of solar cells. A printer for fabricated solar thin-film cells was designed. PID was used to set the temperature of printer nozzle, and a refrigeration device was added to the substrate. And then finally, the printing device was simulated by SW.
Stress analysis of large crude oil storage tank subjected to harmonic settlement
Authors: Zhang Shuxin , Liu Xiaolong , Luo Jinheng , Sun Bingbing , Wu Gang , Jiang Jinxu , Gao Qi , Liu Xiaoben
Published: November 2020

Differential settlement has a significant effect on the safe operation of tanks. In order to investigate the stress response of crude oil storage tank subjected to harmonic settlement. A numerical simulation model of the steel storage tank was developed in this study. Based on a validated finite element model, parametric analysis was conducted based on the main factors. The results show that the stress at the top of the tank wall is symmetrically distributed along the circumference of the tank. The stress result increases linearly with the increasing harmonic amplitude. The axial stress increases firstly, and then decreases for large wave number. Meanwhile, The stress value increases with the increment of the height-to-radius ratio, and decreases with the increment of the radius-to-thickness ratio. Especially, when the height-to-radius ratio ranging from 1.0 to 1.5 or the ratio r/t is more than 1500, the tendency of stress variation is slighter. This study could be referenced in strength or safety assessment of crude oil storage tank subjected to harmonic settlement.
Analysis and treatment of abnormal increase of bearing temperature of 600MW steam turbine
Authors: Ma Lyuzhou
Published: November 2020

During the normal operation of a 600MW turbine in a power plant, the temperature of no.2 bearing rises to the alarm value, which seriously affects the safe operation of the unit. The reason of bearing temperature rise is found by analyzing the change of steam exciting force, and the problem is solved by optimizing the governor valve sequence to diagonal admission mode.
Analysis of electromagnetic radiation spectrum during the explosion of energetic materials
Authors: Yuanbo Cui , Deren Kong
Published: November 2020

In order to provide effective reference data for the equivalent experiment of electromagnetic environment adaptability of electric explosive devices, the electromagnetic radiation generated during the explosion of energetic materials is measured. The spectral characteristics of the electromagnetic radiation during the explosion of energetic materials are obtained by processing the data by means of signal noise reduction, windowed Fourier transform and dynamic spectrum analysis. The results indicate that the spectrum of electromagnetic signal during the explosion of energetic materials shows large changes mainly in the frequency band of 0-100MHz, of which the energy change in the low frequency band below 50 MHz is the most obvious; the distance from the explosion center has an obvious influence on the spectrum distribution of electromagnetic signal, where the closer the test point is to the explosion center, the wider the spectrum distribution of electromagnetic signal is and the stronger the energy is; differences in electromagnetic frequency distribution in different directions reflect the uneven and dispersed propagation of electromagnetic radiation.
Random inertia weight PSO based MPPT for Solar PV under Partial Shaded Condition
Authors: Mingyu Liang , Xinhong Cai , Bingyu Cao
Published: November 2020

Since the power-voltage characteristic curve of a photovoltaic (PV) arrays has multiple peaks under partially shading conditions (PSC), the conventional maximum power point tracking (MPPT) control methods fail to work. In this paper, a PSO algorithm based on random inertia weights is proposed to achieve global maximum power tracking. By improving the inertia weight coefficient of the traditional PSO algorithm and optimizing the search order of the particles, the population size and the number of iterations are decreased, thus finding the MPP (maximum power point) in a shorter time to ensure accurate tracking of the maximum power. By using the same parameters, its tracking performance is compared with traditional perturb and observe (P&O) method and particle swarm optimization (PSO) method, and the existed PSO algorithm is compared with the improved PSO to verify the correctness of the algorithm. The concordance of simulation results prove the advantage of the proposed MPPT method to ensure rapidity and stability of the output PV power.
Power distribution strategy based on fuzzy controller and Savitzky-Golay selective filtering in hybrid energy storage system
Authors: Lin Kai , Wang Mengyuan , Liu Shuangyi
Published: November 2020

Lithiumion batteries, as the power of electric vehicles, are facing challenges due to their intrinsic defects. The hybrid energy storage system with the combination of high power supercapacitor and lithium-ion battery are better promising solution. The peak current output by the lithium battery would be reduced greatly, which would result in great heat reduce and further enhancement of life cycle and safety of the lithium-ion battery. In considering their different charge and discharge behaviors, a high efficient control strategy is necessary for better performances. Here, an intelligent energy control strategy that combines fuzzy controller and Savitzky-Golay selective filtering is studied for HESS controlling. The fuzzy controller has good robustness and is suitable for nonlinear control, while the Savitzky-Golay filter can effectively smooth the waveform, and by selecting the output of both can effectively improve cell performance index. The simulation results show that compared with ESS under the tested cycle conditions, the proposed control strategy reduces the maximum current of the battery by 8.5% and the maximum temperature is reduced by 7.98%; when compared with a single fuzzy controller used by HESS, the proposed strategy can reduce the maximum battery current and maximum temperature by 7.02% and 1.50%, respectively.
Comparative Analysis on Performance of Tri-sectional and Four-sectional Air Preheater in 1000MW Unit
Authors: Xu Chunxing
Published: November 2020

This paper mainly compares and analyzes the characteristics and performance of air preheater for tri-sectional and four-sectional, it is found that the four-sectional air preheater has a great advantage in economy, this is mainly because the four-sectional air pre-heater has obvious advantages in reducing air leakage rate, it can reduce air leakage of air preheater, reduce power consumption of fan and improve thermal efficiency of unit significantly. In addition, it is found that the deviation range of flue gas temperature distribution of four-sectional air pre-heater is small by measuring the flue gas side temperature of the air preheater, the overall temperature of flue gas side is higher than that of acid dew point, it is more conducive to the prevention of low-temperature corrosion at the cold end of air preheater, and the operation of the unit is more safe.
Temporal Distribution Characteristics of PM2.5 in Beijing and Its Influencial Factors
Authors: Chen Ansheng Zhang
Published: November 2020

With the development of China, the environmental problems become serious and attract much concern. Among all the problems, the air pollution caused by PM 2.5 is one of the most serious one. Therefore, this study focus on this problem and analyzes the season series distribution characteristics and influencing factors of PM2.5 through statistical analysis and Spearman and Pearson correlation coefficient method. According to the research result of this paper, the concentration of PM2.5 varies from low to high in spring, summer, winter and autumn. On the whole, PM2.5 concentration in Beijing is negatively correlated with temperature difference, relative humidity and precipitation. Besides, the PM2.5 concentration in Beijing shows a strong correlation with the local wind speed.
Research and Application of Repair and Reinforcement Technology for Typical Aqueduct in Northwest Region
Authors: Wang Fusheng , Ma Yu , Yang Qingsheng , Xia Shifa , Li Xiulin
Published: November 2020

The old aqueduct has some defects, such as the difficulty of upgrading and increasing the water demand in the irrigation area. Combined with the environmental characteristics of the northwest region, this paper relies on the Ningxia Hongjingkeng aqueduct maintenance project and uses the repair and reinforcement technology of large-scale aqueduct structure, which can completely solve the shortage of the aqueduct project. It can provide important scientific and technological support for ensuring the safety of water delivery in irrigation areas and improving the water supply capacity of irrigation areas.
Research on the application of improved SVM model in dam displacement and deformation prediction
Authors: Chenghui Wan , Jiancheng Xie , Xiong Peng
Published: November 2020

Aiming at the influence of dam deformation on many factors, the kernel principal component analysis method is used to compare the factors affecting dam deformation, and the main factors affecting dam deformation are determined. The kernel function of support vector machine is selected, the main influence factor is input, the dam deformation is output, and the optimal parameters are obtained by grid search and cross-verification to establish the model. The deformation results are studied and analyzed, and the prediction effect is evaluated by absolute error and RMSE, and compared with the standard SVM model and the Prophet method based on time series. The results show that the accuracy of support vector machine model is improved obviously by optimizing parameters such as radius of kernel function and penalty factor through mesh optimization, and the prediction accuracy of nonlinear small sample data is significantly higher than that of time series method.
Research on the Impact of Producer Service Industry Agglomeration on Economic Green Transformation
Authors: Yixin Huang , Li Yang
Published: November 2020

This paper selects the data of the lower Yangtze River Economic Belt from 2013 to 2017 as the reference. First, the location entropy method is used to measure the level of producer services agglomeration. Through the establishment of the SBM model, the input and output indicators are introduced to calculate the trend of economic green transformation in provinces and cities of lower Yangtze River economy. Finally, this paper takes the green efficiency value as the dependent variable and uses the five quantities such as the agglomeration degree of the producer service industry as independent variables to construct the Tobit model, and uses the MLE method to measure the variable coefficients to analyze the impact of the agglomeration of the producer service industry on the economic green transformation. The results show that in the lower Yangtze River Economic Belt, Shanghai, Jiangsu Province and Zhejiang Province have a good development trend in the green transition of the producer service industry agglomeration economy; and they all show the spatial distribution characteristics of “east high and west low”; producer services Industry agglomeration has a significant positive role in promoting green economic transformation.
Research and development on industrial heavy metal wastewater treatment technology
Authors: Chen Bo , Chen Yuchao , Xu Lufeng , Zhang Yiming , Li Haixiang
Published: November 2020

With the development of industrial technology and the improvement of industrialization, the discharge of heavy metal wastewater gradually increases. Heavy metals are the main sources of water pollution, and heavy metal wastewater mainly comes from mines, smelting, electrolysis, electroplating, pesticide, medicine, paint, pigment and other enterprises. In this paper, the common heavy metal wastewater treatment technology is summarized, and the characteristics and treatment methods of industrial wastewater are mainly introduced.
Broodstock cultivation of the yellow seahorse, Hippocampus kuda Bleeker, in the aquarium culture system
Authors: Sun Jinhui , Xie Shangduan , Shao Peng , Xia Sudong , Yang Yanjing , Cui Pei , Chen Shaoyang
Published: November 2020

To improve the yield and survival rate of the offspring, the broodstock cultivation methods of the yellow seahorse, Hippocampus kuda Bleeker, were assessed, including the temperature conditions, diets, culture density and mono-or mixed-sex culture. Feeding parent seahorses with live food increased fecundity, and culture density of more than two pairs of parents during mating improved the survival rate of both sexes and decreased the production cycle. Additionally, separate culture of males and females prior to mating improved fecundity as well as the survival rate of juveniles. A higher number of larvae per batch was produced at 26 °C than at 30°C and 22°C, whereas seahorse production occurred at a higher frequency at 30 °C than in the lower temperature treatments. These results suggest that the optimal culture conditions for H. kuda are as follows: provide live food when cultivating seahorse broodstock, use equal proportions of males and females during mating, use monosex culture at other times, and maintain seawater temperature of 26 °C.
Current Standardization and Inspiration of Economical and Intensive Utilization of Land Resources in China
Authors: Liangbing Hu , Qiqi Tan , Gongsangzhuoma  , Zhaxiyangzong  , Xiaolei Ma
Published: November 2020

Economical and intensive utilization of land resources is an important solution for the shortage of construction land in China. It is important to summarize the mode and experience of standardizing the economical and intensive utilization of land resources to generate experience that can be replicated and promoted in different locations. This paper analyzes the construction of standardization technology organizations for utilization of land resources, the basis for economical and intensive utilization of land resources, and the current standardization of technology and real-time supervision, and puts forward suggestions on development.
Analysis of Popular Science Design of Huangpu Shiling Marine Erosion Site Geopark in Guangdong-Hong Kong-Macao Greater Bay Area
Authors: Li Xiuyun
Published: November 2020

Based on the analysis of the current situation of the science popularization system of the Huangpu Marine Erosion Site Park in the Guangdong-Hong Kong-Macao Greater Bay Area, the significance and design concepts of the geological science design of the marine erosion sites in the park are elaborated by means of field investigations, so as to provide reference value for the science popularization planning of Huangpu marine erosion site Geopark.
Variations of Pb Content in the Bottom Waters of the Jiaozhou Bay from the South of the Bay Mouth to the Central Bay Area
Authors: Yang Dongfang , Yang Danfeng , Zhu Hong , Ling Weifeng , Li Haixia
Published: November 2020

According to research data of the Jiaozhou Bay waters in 1992, current variation and horizontal distribution of Pb content in the bottom waters of the Jiaozhou Bay from the south of the bay mouth to the center of the bay were studied. The results show that in May, August, and October, Pb content in the Jiaozhou Bay water ranges from 4.20 to 24.39μg/L, which is in line with the national Class II, Class III, and Class IV seawater quality standards. This result indicates that in May, August and October, in the studied waters, the water quality was slightly, moderately and heavily polluted by Pb content, further revealing that under the effect of vertical water bodies, the bottom waters from the south of the bay mouth to the southeast of the bay, to the center and the southwest of the bay have been severely polluted by human discharge of Pb content. In addition, in the bottom waters of the Jiaozhou Bay from the south of the bay mouth to the center of the bay, Pb content showed high settlement: in May, the southeastern waters; in August, in the central waters; in October, in the southern waters. Therefore, the lead content of Jiaozhou Bay in different months and different places showed high deposition.
Evaluation of green development level of resource-based regions-taking growth resource-based city as an example
Authors: Ting-yu Wang , Sheng-xi Ding
Published: November 2020

This paper builds a green development evaluation index system, selects the data of 2017 in 20 growing resource cities across the country, and comprehensively uses factor analysis and entropy method to quantitatively evaluate the green development comprehensive level index of each city. The results of the study show that there are significant differences in the green development level of each growing resource-based city. Finally, it analyzes and proposes countermeasures and suggestions for promoting the green development of resource-intensive cities.