bluuebunny/crossref_metadata_2025 huggingface dataset:
Global phase diagram of Coulomb-interacting anisotropic Weyl semimetal with disorder
Authors: Wang Jing-Rong , Li Wei , Wang Gang , Zhang Chang-Jin
Published: December 2020

Taking into account the interplay between the disorder and Coulomb interaction, the phase diagram of three-dimensional anisotropic Weyl semimetal is studied by renormalization group (RG) theory. Weak disorder is irrelevant in anisotropic Weyl semimetal, while the disorder becomes relevant and drives a quantum phase transition (QPT) from semimetal to compressible diffusive metal (CDM) phases if the disorder strength is larger than a critical value. The long-range Coulomb interaction is irrelevant in clean anisotropic Weyl semimetal. However, interestingly, we find that the long-range Coulomb interaction exerts a dramatic influence on the critical disorder strength for phase transition to CDM. Specifically, the critical disorder strength can receive a prominent change even though an arbitrarily weak Coulomb interaction is included. This novel behavior is closely related to the anisotropic screening effect of Coulomb interaction, and essentially results from the specifical energy dispersion of the fermion excitations in anisotropic Weyl semimetal. The theoretical results are helpful for understanding the physical properties of the candidates of anisotropic Weyl semimetal, such as pressured BiTeI, and some other related materials.
Study of a measurement system and a method for determining the distance between the grooves of a hydraulic valve
Authors: Huang Shilei , Long Wei , Gan Fangji , Li Ying , Li Wenyang
Published: December 2020

Hydraulic valves are critical control components of hydraulic systems. To ensure hydraulic control systems are accurate, the distance between the grooves of hydraulic valves should be measured. This distance critically impacts how much oil is fed. In previous measurements, a coordinate-measuring machine or a universal tool microscope were applied. However, these two methods exhibited low measuring precision in terms of center eccentricity, incorrect initial position, boresight error, etc. In the present study, a high-precision non-contact automatic instrument is developed that solves chord length and uses a machine-vision technique to determine distance. Besides, an angle-compensation method is proposed to remedy the boresight error attributed to motion control in a closed-loop system. Moreover, an eccentricity-correction method is put forward to correct the angular error attributed to the eccentricity of the measurement system, enhancing measurement precision. As revealed by the experimental results, the maximum limit error of a single measurement is less than 3.3 μ

m

, verifying the feasibility of the novel instrument.
Nanostructured diamond for biomedical applications
Authors: Pandey Prem C , Shukla Shubhangi , Pandey Govind , Narayan Roger J
Published: December 2020

Nanostructured forms of diamond have been recently considered for use in a variety of medical devices due to their unusual biocompatibility, corrosion resistance, hardness, wear resistance, and electrical properties. This review considers several routes for the synthesis of nanostructured diamond, including chemical vapor deposition, hot filament chemical vapor deposition, microwave plasma-enhanced chemical vapor deposition, radio frequency plasma-enhanced chemical vapor deposition, and detonation synthesis. The properties of nanostructured diamond relevant to medical applications are described, including biocompatibility, surface modification, and cell attachment properties. The use of nanostructured diamond for bone cell interactions, stem cell interactions, imaging applications, gene therapy applications, and drug delivery applications is described. The results from recent studies indicate that medical devices containing nanostructured diamond can provide improved functionality over existing materials for the diagnosis and treatment of various medical conditions.
Surrogate-free machine learning-based organ dose reconstruction for pediatric abdominal radiotherapy
Authors: Virgolin M , Wang Z , Balgobind B V , van Dijk I W E M , Wiersma J , Kroon P S , Janssens G O , van Herk M , Hodgson D C , Zadravec Zaletel L , Rasch C R N , Bel A , Bosman P A N , Alderliesten T
Published: December 2020

To study radiotherapy-related adverse effects, detailed dose information (3D distribution) is needed for accurate dose-effect modeling. For childhood cancer survivors who underwent radiotherapy in the pre-CT era, only 2D radiographs were acquired, thus 3D dose distributions must be reconstructed from limited information. State-of-the-art methods achieve this by using 3D surrogate anatomies. These can however lack personalization and lead to coarse reconstructions. We present and validate a surrogate-free dose reconstruction method based on Machine Learning (ML). Abdominal planning CTs (n = 142) of recently-treated childhood cancer patients were gathered, their organs at risk were segmented, and 300 artificial Wilms’ tumor plans were sampled automatically. Each artificial plan was automatically emulated on the 142 CTs, resulting in 42,600 3D dose distributions from which dose-volume metrics were derived. Anatomical features were extracted from digitally reconstructed radiographs simulated from the CTs to resemble historical radiographs. Further, patient and radiotherapy plan features typically available from historical treatment records were collected. An evolutionary ML algorithm was then used to link features to dose-volume metrics. Besides 5-fold cross validation, a further evaluation was done on an independent dataset of five CTs each associated with two clinical plans. Cross-validation resulted in mean absolute errors ≤ 0.6 Gy for organs completely inside or outside the field. For organs positioned at the edge of the field, mean absolute errors ≤ 1.7 Gy forDmean, ≤ 2.9 Gy forD2cc, and ≤ 13% forV5 GyandV10 Gy, were obtained, without systematic bias. Similar results were found for the independent dataset. To conclude, we proposed a novel organ dose reconstruction method that uses ML models to predict dose-volume metric values given patient and plan features. Our approach is not only accurate, but also efficient, as the setup of a surrogate is no longer needed.
Wavelength censoring for spectroscopy in optical functional neuroimaging
Authors: White Brian R , Padawer-Curry Jonah A , Ko Tiffany , Baker Wesley , Breimann Jake , Cohen Akiva S , Licht Daniel J , Yodh Arjun G
Published: December 2020

Optical neuromonitoring provides insight into neurovascular physiology and brain structure and function. These methods rely on spectroscopy to relate light absorption changes to variation of concentrations of physiologic chromophores such as oxy- and deoxyhemoglobin. In clinical or preclinical practice, data quality can vary significantly across wavelengths. In such situations, standard spectroscopic methods may perform poorly, resulting in data loss and limiting field-of-view. To address this issue, and thereby improve the robustness of optical neuromonitoring, we develop, in this manuscript, novel methods to perform spectroscopy even when data quality exhibits wavelength-dependent spatial variation. We sought to understand the impact of spatial, wavelength-based censoring on the physiologic accuracy and utility of hemoglobin spectroscopy. The principles of our analysis are quite general, but to make the methodology tangible we focused on optical intrinsic signal imaging of resting-state functional connectivity in mice. Starting with spectroscopy using four sources, all possible subset spectroscopy matrices were assessed theoretically, using simulated data, and using experimental data. These results were compared against the use of the full spectroscopy matrix to determine which subsets yielded robust results. Our results demonstrated that accurate calculation of changes in hemoglobin concentrations and the resulting functional connectivity network maps was possible even with censoring of some wavelengths. Additionally, we found that the use of changes in total hemoglobin (rather than oxy- or deoxyhemoglobin) yielded results more robust to experimental noise and allowed for the preservation of more data. This new and rigorous image processing method should improve the fidelity of clinical and preclinical functional neuroimaging studies.
Multi-channel transcranial temporally interfering stimulation (tTIS): application to living mice brain
Authors: Song Xizi , Zhao Xue , Li Xiaohong , Liu Shuang , Ming Dong
Published: December 2020

Objective. Transcranial temporally interfering stimulation (tTIS) is a noninvasive neuromodulation method, which has been reported to be able to affect the activity of small neuronal populations. To pinpoint smaller regions of the brain, a multi-channel tTIS strategy is proposed with larger numbers of electrodes and multiple sets of interfering fields. Approach. First, a computational model is adopted to prove the concept of multi-channel tTIS theoretically. Besides, animal experiments are implemented to activate motor cortex neurons in living mice and different frequencies are attempted. Finally, to better understand the envelope modulation properties of the two applied fields, tissue phantom measurement is conducted. Main results. The focality of six-channel (six electrode pairs) tTIS is increased by 46.7% and 70.2% respectively, compared with that of single-channel tTIS when maximal amplitude value drops by 3 dB and 6 dB in a numerical computation experiment. Furthermore, the focality of multi-channel tTIS is less sensitive to the electrode position. Confirmed with the myoelectricity signal, the movement frequencies of the contralateral forepaw are consistent with the corresponding difference frequencies. What is more, compared to single-channel (one electrode pair) tTIS with multi-channel (three electrode pairs) tTIS, the intensity of multi-channel tTIS stimulation is decreased by 28.5% on average in animal experiments. The c-fos-positive neurons of the target region are significantly higher than that of the non-target region. Results of the modulated envelope distribute around the whole region and its amplitude reaches a maximum at the interfering region. Significance. Both computational modeling and animal experiment validate the feasibility of the proposed multi-channel tTIS strategy and confirm that it can enhance focality and reduce scalp sensation.
Study on vegetable emergency support technology under epidemic
Authors: Du Hongyu , Chen Xiangning
Published: December 2020

As an important nutrient source in the diet of residents, vegetables are an important guarantee to enhance immunity. The outbreak of COVID-19 has led to labor restrictions, poor logistics and transportation, and changes in residents’ consumption and eating patterns, which have challenged the traditional supply model of vegetables. In response to this challenge, this study analyzes the outbreak of vegetables reserves, distribution, supply, quality and safety and the influence of supply mode in five aspects. It also analyzes how to carry out technical research in order to make timely adjustments to the supply mode of vegetable products and ensure the residents’ vegetable supply.
Operation task extraction method and application of rice operation machinery in South China based on GNSS
Authors: Li Xiaobing , Yang Jianfeng
Published: December 2020

According to the characteristics of rice planting and rice operation machinery in South China, the paper discusses how to use the satellite of the operation machinery to position trajectory information, to extract operation task by field based on the clustering algorithm of OPTICS, and to calculate the operation area by broken line buffer algorithm. The paper also discusses about parameter setting of OPTICS. The accuracy of extracting tasks by field can be over 84%. When the area of each task is over 3 mu (0.2 hectares), the calculation accuracy can reach over 95%. On the surface of practical application in Guangdong Province in recent three years, the algorithm can meet the requirements of operation charging and government subsidy giving, and realize accurate task differentiation and area calculation.
Ontology-based multi-sensor information integration model for urban gardens and green spaces
Authors: Hu Xin , Chen Qiang , Du Meng
Published: December 2020

With the continuous development of smart landscape and the application of IOT technology in urban gardens and green spaces, the environmental data and soil data collected by various sensors are conceptually inconsistent with each other. The information derived from the data is mostly used independently, and the relationship between data and information in the database is relatively simple, and it is impossible to explore deeper associations between information. To solve this problem, a multi-sensor information integration model based on ontology is studied. Based on the characteristics of the perception terminal data of smart garden management, this article analyzes the ontological relationship between various resources of the garden and green space, and builds the ontology description model of the urban garden and green space based on the five-tuple structure of the ontology and the seven-step method to realize the information integration of perception data and the description of the relationship between sensors, this model provides a unified information model for the smart garden system to achieve information sharing. This paper describes the construction of local ontology and the related methods of global mapping, illustrate the construction process of ontology, and conducts ontology reasoning and ontology query according to the result of construction.
Tech for a Better Planet: A Corpus-based Analysis of the Environmental Disclosure in CSR Reports of Huawei
Authors: Fei Liao
Published: December 2020

The CSR report, as a way for stakeholders and the public to understand and audit a company’s practices of social responsibilities, plays an increasingly important role in the construction of the corporate image. Aimed at exploring how Huawei addresses global environmental issues and constructs its green and responsible image as a business, this paper studies the environmental disclosure in Huawei’s CSR reports from 2010 to 2019. Taking Halliday’s Systemic Functional Linguistics (SFL) and Kress and van Leeuwen’s visual grammar as theoretical frameworks and the corpus software AntConc as the analytical tool, this study tries to investigate how the language and images are used to convey Huawei’s environmental concept and build its identity. It is shown that Huawei, by using words and images related with nature, energy conservation as well as green products, highlights the role of technology in solving environmental problems to leave the public an impression of a responsible corporate. However, Huawei doesn’t perform well in terms of guiding the public to participate in natural protection because people’s environmental role is marginalized and natural problems are hedged in the reports. It’s hoped that the findings can help companies to construct their environmental reports more effectively which will not only promote their reputation but also guide the public to protect the planet.
An Empirical Study of The Effect of Urban Street Park on Park Users’ Mood
Authors: Wang Zhipeng , Jiang Yuan , Lu Chao , Zheng Xiaokang
Published: December 2020

Urban street park is an important part of the urban park system, and also a kind of park with high contact frequency in people’s daily life, so it has potential promoting effect on people’s mental health. In order to test the effect of urban street park on the mood state of park users, this study took a street garden in Hefei of China as the research site and used stratified sampling method to carry out a questionnaire survey on park users visiting the park at different time periods. One way ANOVA results show that there is a significant difference in the mood changing scores among park users in the different groups of the satisfaction of the environment of the green landscape space, the resting space and the fitness space. Regression analysis results show that the park users’ satisfaction with the environment of the green landscape space and the resting space and the time spent in the park are positively correlated with their mood changes, indicating that the better quality of the environment of the green landscape space and the resting place of the park, the longer the park users staying in the park, the more positive effect of the park environment on users’ mood state. The conclusion provides a scientific basis for the related research on the mental health effects of urban parks.
Research on conventional triaxial test of recycled aggregate concrete with PVA fiber
Authors: Lin Wang Sheng , Long Zhu Bao , Li Ling
Published: December 2020

The DYS-2500 high temperature and high pressure rock triaxial testing machine was used to perform regular triaxial compression tests on ordinary concrete recycled aggregate concrete and recycled aggregate concrete mixed with PVA fiber. By changing the recycled coarse aggregate replacement rate of recycled aggregate concrete mixed with PVA fiber(the replacement rates, respectively, are: 0%, 30%, 60%, 100%), the performance of recycled concrete with PVA fiber was compared with conventional recycled aggregate concrete and natural aggregate concrete concerning with its mechanical properties, fracturing process, deformation as well as other characteristics of it. Studies have shown that as the replacement rate of recycled aggregate enhanced, the impact it made on its performance grows. When the replacement rate of recycled aggregate is 30%, after mixing with PVA fiber, the compressive strength of recycled aggregate concrete with PVA fiber is greatly improved, reaching 95% of the compressive strength of natural concrete. When the replacement rate of recycled aggregates is the same as the confining pressure, the peak stress of recycled aggregate concrete samples with PVA fibers is 1.12-1.36 times of ordinary recycled aggregate concrete samples.
Frame-based Conceptual Model of Smart City’s Applications in China
Authors: Gu Qinhuan
Published: December 2020

Starting from the development path of modern cities, this thesis expounds the conceptual-based framework of application as well as the development background and overall status of “Smart City”. Specifically, it focuses on analyzing basic applications in three major areas (smart health, smart transportation, and smart community), studies some innovative practices of smart construction in China, and prospects the challenges and trends of smart city development in China.
A Comprehensive Analysis on the Future of Algae Biofuels in China
Authors: Du Yunze
Published: December 2020

As the biggest developing country on this planet, China is progressing in its economy, industry, and technology at an incredible speed, but along with this rapid development is the huge demand for energy. Conventional fossil fuels cover more than 70% of primary energy supply in China, while at the same time bringing environmental and economic issues. Renewable energy, such as bioenergy, might be the solution to resolve the energy crisis faced by China. China has a mild climate, plentiful water resources, and sufficient sunshine that are suitable for algae to grow, so algae biofuels might have a bright future to fulfill the need for energy in China in an ecologically friendly way. Based on existing studies, models, and data, this paper discusses the technological possibility and limitation, economic feasibility, and environmental benefits and concerns of developing algae biofuels in China. Lastly, the paper gives several future prospects to the system in order to make algae biofuels more practical to be a both commercialized and competitive energy source in China.
Application of Phase Change Heat Storage Technology in Vehicle Engineering Field
Authors: Li Changting , Gou Fanghuai , Yu Ruifei
Published: December 2020

With the development of human economy and science and technology, and the problem of energy shortages has become increasingly prominent. New energy research is the focus of attention worldwide, and phase change heat storage technology is one of the main means to improve the efficiency of new energy utilization, it is a hot area of research in recent years. This paper briefly introduces the importance of phase change heat storage technology, and briefly summarizes the classification, enhanced heat transfer technology and application fields of phase change materials. The application of phase change heat storage technology in vehicle engineering is prospected and discussed.
Analysis of electric-heat characteristics and power storage capacity of emergency power supply in substation based on energy saving and environmental friendly materials
Authors: Wang Xun , Tan Yinghui , Yu Wenbo , Feng Xuemin , Ma Guoyi , Chen Ming
Published: December 2020

With the continuous increase of DC power system of substation, DC emergency power supply is needed for technical transformation and troubleshooting of DC power supply system. In order to study the ideal backup tool of DC power supply with light weight, small volume and easy to carry, and guarantee safety and stability of the renovation of substation dc system, this paper studies the ternary lithium ion battery with the advantages of large capacity and small volume. The paper intends to master the heating and cooling conditions of ternary lithium-ion batteries in charging and discharging process. Then, the feasibility application in substation emergency power supply of ternary lithium ion battery is analysed. The example results prove that the use of ternary lithium ion battery could meet the demand of using a variety of scenarios of transformer substation, and improve the reliability of dc power supply system.
Research and Discussion on Design Method of Energy-saving Architecture Oriented to the Full Life Cycle
Authors: Chen Li Sheng
Published: December 2020

The full life cycle architectural design requires to start at the design stage, fully consider the important links in each stage of architectural design, construction as well as operation management and optimize the design of green energy saving on the basis of the concept of taking the whole situation into consideration. Different from traditional architectural design, the building energy-saving design oriented to the full life cycle has higher design requirements for the integrity, coordination, integration and parallelism of the project life cycle. In this paper, it starts from the design concepts of energy saving, environmental protection and green to discuss the methods of energy saving and emission reduction in architectural design. It aims to provide some references for green architectural design.
Fault location of secondary equipment in smart substation based on switches and deep neural networks
Authors: Liu Xiaoping , Li Yalei , Li Wenzhuo , Zhang Fujia , Zhang Jinhu , Li Ang
Published: December 2020

With the continuous development of smart substations, the functions of switches have been continuously improved. To improve the efficiency of the operation and maintenance of secondary equipment, this article proposes a fault location method for secondary equipment in smart substations based on switches and deep neural networks. First, the key alarm signal capture function and traffic statistics function are configured on the switch. Secondly, based on alarm information, traffic statistics, and message subscription relationships, the representation of the fault feature information method is proposed. Using the training rules of deep learning, the fault location model of secondary equipment based on deep neural network is established and the fault location steps are given. Taking the line spacing of smart substations as an example, simulations verify the effectiveness of the fault location method, and good location results can still be obtained in an environment with insufficient feature information reliability.
Research progress on logistics network optimization under low carbon constraints
Authors: Fang Xiaohong , Nie Li , Mu Hua
Published: December 2020

In this paper, a literature review was conducted on the optimization of logistics network under low carbon constraints. This paper summarized the basic research process of logistics network optimization, and discussed the basic problems of logistics network optimization (distribution center location and vehicle distribution route optimization) and the compound optimization problems of logistics network (forward logistics network optimization and reverse logistics network optimization). In this paper, we mainly discuss the mathematical model constructed by one or more of the goals of minimum carbon emissions, minimum sum of total costs, minimum total delivery time and minimum total delivery distance, and the solving strategies using heuristic algorithms such as particle swarm optimization, genetic algorithm, and ant colony algorithm. It provided the latest technology in this field for the researchers of enterprise logistics network model and points out the future development trend.
Effect of molten salt phase change layer on thermal performance of solar vacuum collector
Authors: Xia Nanya , Wang Hua , Xie Shukuan , Ma Xiaomeng
Published: December 2020

A novel straight through vacuum solar energy collector with molten salt phase change thermal storage layer was proposed. Solar salt (60% NaNO3-40% KNO3) was used as phase change materials (PCMs), and the effect of phase change material layer on the thermal performance of straight-through type vacuum solar energy collector has been studied numerically. The results show that: A 13 mm thick phase change material layer was added to the collector tube with an outer diameter of 17 mm, and the heat storage was increased by 53.57%; when the solar radiation is stopped, a constant temperature of 4min-16min is maintained, and then the temperature drops more slowly than that without addition. Molten salt phase change layer can significantly reduce the influence of solar cycle and instability on the straight-through solar vacuum collector tube.
A novel integrated pyrolysis-gasification technology for improving quality of bio-gases from multisource solid wastes
Authors: Li Aishu , Hu Song , Han Hengda , Huang Haizhou , Guo Tingting , Xiang Jun , Wang Yi
Published: December 2020

Recovery and utilization of municipal solid waste (MSW) into syngas has already attracted the attention of researchers for years. However, until now the MSW such as sewage sludge and plastics still lack a way of industrial utilization due to the relatively low transformation efficiency or low gas quality. Accordingly, a novel integrated pyrolysis-gasification technology is proposed in this study, in which the volatiles and steam released from the pyrolysis of sewage sludge at 450°C take part in the gasification of plastic at 600 °C-800°C, taking advantage of high-water content of sludge to produce high quality bio-gas. At the same time, the synergistic effect between sludge pyrolysis and plastic gasification was explored by product analysis. Compared to pyrolysis or gasification alone, the aromatic degree of the bio-oil obtained by the integrated technology under pyrolysis at 450°C and gasification at 700°C weakens. Whereas, the aromatic degree of the bio-oil obtained at 450°C (pyrolysis) and 800°C (gasification) deepens, and the yield of C2Hy in the bio-gas improves markedly. The higher temperature promotes the decomposition and condensation of macromolecules and also strengthens the influence of volatiles and steam from sludge pyrolysis on the structural fracture of plastics during gasification to some extent. In conclusion, this technology can significantly improve bio-gas yield and quality at high temperature.
Energy and Mineral Resources Mining Contradictions in Coal-Uranium Coexisting Basin and the Countermeasure Suggestions
Authors: Wang Wenxu , Wang Wei , Yan Pengbing , Zhao Jinfeng
Published: December 2020

It is common that sandstone-type uranium deposits co-exist with coal and oil & gas in the same sedimentary basin, and the output of uranium deposits is closely related to the coal seam or oil & gas reservoir. An “upper uranium and lower coal” ore-bearing pattern is formed in Ordos Basin and Erlian Basin in China. Due to the absence of unified resource mining plan and policy coordination mechanism, the coal-uranium resource mining contradictions have become increasingly prominent in coal-uranium coexisting areas in recent years. It is difficult to realize in-situ leaching exploitation of the coal-uranium resources in the Ordos coal-uranium coexisting area because of disorderly mineral resource mining, radioactive contamination risks are posed to the ambient environment of the mining area, and consequently, coal mine enterprises have to stop work and production, which gives rise to huge economic loss. Given this, the current resource contradictions in this area and their influence paths were comprehensively expounded through a systematic survey on a coal-uranium superposition area, and then the corresponding countermeasure suggestions were proposed.
Numerical analysis of effect of phase change thermal storage layer and annular fins on thermal performance of linear concentrating solar evacuated tubular collector
Authors: Wang Hua , Jiang Yongjie , Zhang Xinmin , Pang Shusheng , Mei Yanyang
Published: December 2020

The effects of Phase Change Thermal Storage Layer (PCTSL) and annular fins on the thermal performance of linear concentrating solar evacuated tubular collector are numerically studied. July 15 and January 15 with relatively longer and shorter solar radiation durations are selected as the dates to simulate. Three types of linear concentrating solar evacuated tubular collectors with length of 400 mm are established, which are the traditional collector, the collector with PCTSL but without annular fins, and with PCTSL and annular fins. The results show that the maximum outlet transformer oil temperature of with PCTSL but without annular fins is 5.9 °C-10.7 °C lower than the traditional one, but the outlet oil temperature change rate of the collector with PCTSL is slow; the maximum temperature duration time of the collector with PCTSL but without annular fins is 2-2.5 hours longer than that of the traditional conditions; adding fins in PCTSL makes the outlet oil temperature reach the peak more than 30 minutes earlier. The PCTSL and annular fins studied in this paper have greatly improved the thermal performance of solar collectors and have broad application prospects.
Photovoltaic power generation data filling model based on tensor decomposition
Authors: Xie Xiangying , Liu Hu , Ma Xiaoguang , Ma Dayan , Luo Xin
Published: December 2020

With the development of new energy and the increase in demand, photovoltaic power generation has received more and more attention. However, due to the susceptibility of photovoltaic power generation to the influence of weather factors, especially the influence of solar irradiation, it is intermittent and fluctuating. Understanding the power generation data of a PV plant has a great effect on the subsequent photovoltaic power generation planning and photovoltaic power plant situation assessment. However, these data are often incompletely recorded due to frequent communication problems or equipment failures. Most current studies focus on photovoltaic power generation predictions, it is still a challenge to speculate the missing data around photovoltaic power plants. In this paper, a context-sensitive tensor decomposition model is proposed to intelligently fill the missing power generation entries. The experimental results show that our model can effectively fill missing data and obtain good results.
Effect of Regulated Deficit Irrigation on Potato under-Mulched Drip Irrigation
Authors: Zhou Sanli , Li Fuqiang , Zhang Hengjia
Published: December 2020

In order to study the effects of water deficit on potato under-mulched drip irrigation, the paper interpreted the effects of water deficit at different growth stages on growth characteristics, yield, quality and the water use of potato under-mulched drip irrigation. The results showed that mild water deficit treatment in potato tuber forming period can effectively reduce excessive plant branches and contribute to the increase of crop yield. Meanwhile, the total sugar content, protein and starch content can be improved, and the content of organic acids was significantly reduced, which is conducive to the improvement of potato quality. Tuber growth period is a period with large water demand for crops, so that enough moisture should be guaranteed during this period. Finally, the current problems in potato planting were analysed, and the future research directions were prospected.
Cloning and functional analysis of HMGR gene in Ligularia fischeri
Authors: Du Juan , Hu Wenzhong , Yang Dongsheng , Meng Fanxin , Li Yanfang
Published: December 2020

3-hydroxy-3-methylglutaryl CoA reductase cDNA genes have been successfully isolated from Ligularia fischeri and named as HMGR with 2031bp (Gen Bank accession number: DQ916106), which encodes a predicted polypeptide of 579 amino acids. The pBSHMGR gene vector was successfully constructed. The HMGR gene is over expressed through agrobacterium transformation. Southern and Northern analyses of transgenic plants showed that the HMGR gene was integrated into the Ligularia fischeri genome and expressed at the transcriptional level. HPLC analysis showed that the Shionone content in transgenic roots and stems of Ligularia fischeri were increased 16.67% and 12.25% as compared with the control.
Design and preparation of Ag/AgCl/NH2-MIL-101 (Fe) ternary composite photocatalysts with visible light application prospects
Authors: Xu Chunhua
Published: December 2020

In this work, Ag/AgCl/NH2-MIL-101 (Fe) composite photocatalysts were designed and constructed by an in-situ UV reduction method. Simultaneously, the characterization of the sample mainly included X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). The sample displayed excellent performance and stability of water, air and ultraviolet light in the preparation process. The formation mechanism was proposed based on the cooperation of the reaction between Ag+ and Cl- in NH2-MIL-101 (Fe) and vluraviolet reduction. The Electron Spin Resonance (ESR) results demonstrated that the main active oxygen species were •OH and •O2
- in the photocatalytic process. This work would provide a novel strategy for synthesizing highly efficient photocatalysts in the visible light field.
Ways to improve the energy efficiency of renewable energy sources
Authors: Petrov Yu S , Muzaev A K , Maskov S P
Published: December 2020

The ways of increasing the energy efficiency of the use of renewable energy sources are considered. The descriptions of universal energy complexes that simultaneously use converters of various types: solar rays, wind flows into electrical energy, patented at SKGMI (GTU) are given. The prospect of using renewable energy sources for autonomous power supply of objects in mountainous regions has been substantiated.
Ultrasonic multipath monitoring of turbulent gas flows: pulse signals correlation processing
Authors: Bychkova I Y , Bychkov A V , Slavutskii L A , Grigoriev V G , Kitaev A I
Published: December 2020

The article proposes digital phase modulation and correlation processing of pulsed ultrasonic signals for the turbulent gas flows monitoring. Estimates of errors in measuring the relative time delay of ultrasonic pulses during multipath propagation and their interference in the receiver were made. The data obtained from the experiment show that the relative pulse delay measured in a turbulent gas flow has a resolution exceeding tenths of the carrier frequency period. As an example the possibilities of turbulence’s quantitative control the air flow boundaries of a fan are shown. The perspectives to use the developed software and hardware in flow meters and other ultrasonic control and measuring devices are discussed.
Sintering in a microwave field is a promising ecological technology for producing nanostructured ceramic composites from natural raw materials
Authors: Zhenzhurist I A
Published: December 2020

The article provides literature data on sintering inorganic substances in an electromagnetic field, shows the prospects for research in this direction. The results of sintering samples from masses based on natural compositions: marl, low-melting loam and diatomite with carbonate additives in a microwave oven are considered. The possibility of sintering in a microwave field of natural raw materials, which is traditional for the production of many fired ceramic products, has been established. The phase compositions of the fired materials have been determined. The composition of sintered compositions, consisting of nanoscale phases, has been established. The effect on the sintering process of the composition of the raw material composition from the carbonate component, diatomite and the addition of NaCl salt is shown. Samples from a mass based on marl, with the addition of diatomite and NaCl salt show high quality and increased strength of the samples, the presence of a large percentage of the amorphous phase in the fired sample, and a uniform microstructure of the material. Specimens from masses based on clay with the addition of chalk and NaCl salt after firing in the microwave field showed a significant increase in strength.
Dynamic mode of the mathematical model of an electric multipole with memresistive branches in conditions of interval uncertainty
Authors: Bondarev A V , Efanov V N
Published: December 2020

This article discusses a method for obtaining a mathematical model of an electric multipole with memresistive branches in finite parameter increments for a large signal mode in time domain calculation when calculating a direct current based on a generalized model obtained earlier. A computational algorithm for calculating nanoelectronic circuits based on methods of interval arithmetic is also given.
Formation of a commodity fuel portfolio of Kuzbass on the basis of coal preparation waste
Authors: Chernikova O P , Strekalova S A , Zhdanova N G , Grinkevich O V
Published: December 2020

The Kemerovo Region development strategy until 2035, updated in September 2020, is a forecast of the global technological leadership of Kuzbass, diversification of transport communications with other regions and states, adaptation to the conditions of the 2019 coal industry crisis. To solve these strategic tasks, coal mining and processing enterprises must balance their fuel portfolio and look for new ways to market their products, including the possibility of using production waste. Within the framework of the research carried out by the team of authors: the ecological, technological and economic advantages of using a coal-water suspension as a fuel component have been systematized; identified potential areas of its application; an analysis of the world experience of transporting coal through pipelines was carried out; a proposal was formulated for a project for the construction of the Kuzbass-Ural pipeline for the supply of coal-water fuel to Western Siberia and the Eastern Urals, and the advantages and disadvantages of coal hydrotransportation in comparison with its railroad delivery were identified.
Distillation of vacuum gas oil in a column with new packings
Authors: Farakhov M I , Laptev A G , Farakhov T M , Akhmitshin A A
Published: December 2020

A description of the technological scheme of the unit for separating the fraction of vacuum gas oil (FVG) is given, where the process of separation of heavy gas oil from FVG takes place in the column. The main focus of the work is on the design of a distillation column using the new structured roll packing. The fractional composition of the feedstock, by-product, light gas oil, and the target product, which is heavy gas oil, is presented. Requirements for the design of a structured packing in terms of pressure drop and separation efficiency are formulated. A structured roll packing with corrugations and rough surface having specific surface area of 300 m2/m3is chosen. The diagram and photograph of the packing are presented. Comparative values of specific pressure drop for several structured packings are given. It is shown that the selected packing provides the lowest hydraulic resistance. For mathematical modeling and calculation of the multicomponent distillation process, a system of mass transfer equations with interfacial bulk sources of transfer components is used. In this case, for the conditional component, a fraction at the specified boiling points is used. As a result of solving the system of equations with boundary conditions, the profiles of the fractions along the height of the packed bed are found and the structural characteristics of the structured packing are selected that meet the requirements for the top and bottom of the column. Calculations of a vacuum distillation column with this packing are carried out and it is found that the bed height of 6 meters is sufficient to meet the requirements for the fractional composition of the upper and lower products, while meeting the pressure drop requirements. The developed scientific and technical solutions have been implemented at a refinery in Malaysia and correspond to the technical specifications for the design of the unit.
Features of the formation of environmental protection mechanisms during the operation of objects of the electric power complex
Authors: Provodina E V , Krasovskaya O Yu , Gerasimova T A , Predeus Yu V , Tserpento D P
Published: December 2020

Based on the analysis of the methods of greenhouse gas stations used for environmental pollution, their systematization into a single mechanism for ensuring environmental safety at various levels is presented: from the state level to the technological system. The content of the constructed mechanism for substantiating the need for the interdependent functioning of its elements. The peculiarity of the proposed mechanism is that it contains elements that ensure the safety of the environment, guaranteeing the means and methods of implementing environmental protection issues.
First steps of Renewable Technology in Russia
Authors: Kulkova O D
Published: December 2020

The article gives a brief analysis of some of the benefits provided by Renewable Technology, the ways in which they differ from traditional sources of electrical energy, an overview of the regulatory bodies and the general rules that govern the wholesale electricity market in Russia, the functioning of generation capacity of trading market. Then the mechanisms that exist to encourage market participants to accurately predict supply and demand will be outlined below. Finally, a short description of some other measures that maybe taken in the future to support the growth of the Russian Renewable Energy are to be examined.
Formation of a system for achieving sustainable development of the electric power complex
Authors: Gibadullin A A
Published: December 2020

The article analyzes the influence of various factors on the electric power complex. The study showed that the internal factors associated with the condition of the equipment in operation have the greatest influence. The analyzed indicators indicate that during the periods under consideration, there are practically no changes associated with a decrease or increase in the number of accidents at stations and networks. At the end of the work, recommendations were presented to ensure the stability of the electric power complex, which should include long-term and short-term plans.
Trends in the development of the Smart home system and its integration into modern society
Authors: Deyanov E M , Kharitonova N A
Published: December 2020

The stages of development of smart home systems and integration of these systems into the city infrastructure are considered. The main advantages and disadvantages of these solutions are identified, and problems associated with their installation and use are identified. The research on the volume of markets and target audience is analyzed, and the trends of recent years in the areas of both "smart home" and "smart city in General" are considered. Priority directions of development of the entire field of solutions are indicated. Specific examples of using smart systems in different configurations and with different functions are considered. Conclusions are drawn about the current situation on the market, as well as about the future prospects for implementing smart home systems in the lives of users.
Development of liquefied natural gas transport and creation of energy infrastructure for its functioning in Russia
Authors: Miagkov N A , Kharitonova N A
Published: December 2020

This is as a monitoring result of the actual scientific literature in the field of using liquefied natural gas as a motor fuel. The ecological and technological advantages of using liquefied natural gas in this area are considered. Based on this, conclusions are drawn about the competitiveness of liquefied natural gas relative to other types of motor fuel. Analyzed the current energy strategy of the Government of the Russian Federation in the field of promoting and popularization of liquefied natural gas as a motor fuel and the development of energy and filling infrastructure. Based on the identified shortcomings of the strategy, an alternative option is proposed that relies on local gas filling systems, mini-gas liquefaction plants, and mobile gas stations. An assessment of the technical and economic parameters of the project for the creation of such an infrastructure was carried out because of which a conclusion was made about its overall efficiency. Options for implementing the concept of alternative development of the energy and refuelling infrastructure of liquefied natural gas and its integration into the state energy policy are proposed.
Assessment of resources and development factors of the scientific and educational subsystem
Authors: Tomshinskaya I N , Ivanova N V , Vinogradova E B
Published: December 2020

This paper touches upon the scientific and educational subsystem, since the formation and development of this particular subsystem are demanded by the conditions of post-industrial transformations, the process of increased spatial competition. This need applied to the economy of a megalopolis is reinforced by a contradictory combination of relatively high investment attractiveness, the presence of several modern growth points, on the one hand, and the “obsolescence” of competencies that the human factor has, on the other hand. Significant problems in the development of the scientific and educational subsystem of St. Petersburg are considered in the paper. The individual components of the desired subsystem with the identification of strengths and weaknesses are analyzed. An approach to the analysis of the development factors of a promising subsystem of a scientific and educational profile is proposed: representing the integral result of this subsystem in the space-time continuum of the regional economy as a production function. The authors see the direction of further research in the allocation of groups of factors-arguments of the production function.
Analyzing the main casting defects and their mold parameters
Authors: Kozlova A T
Published: December 2020

At present, the manufacturer and the buyer find themselves in the market, and consumers pay great attention to the price and quality of the product. This means that the fate of the manufacturer depends on it. Casting gets closer and closer to the part, and a number of surfaces are the ones of the future part. Requirements for roughness, design, the competitiveness of the part increase, and the question of the quality and cost of the product is raised. All this determines the relevance of the chosen topic. In the foundry, the most popular technology for printing sand synthesis molds, due to inexpensive materials and quality of products. Casting quality directly depends on the quality of the synthesis molds; therefore, constant monitoring of the parameters of the sand molds is required. [1-3]