bluuebunny/crossref_metadata_2025_split huggingface dataset:
Quality of life as a dominant of increasing life security in the region (as exemplified by Irkutsk oblast)
Authors: Veselova V N 
Published: January 2021

Abstract
Assessment relevance of the social security of population in situation of low standards of living and life quality is of paramount importance. The article examines the quality of life of the population as a dominant of increasing the social security of the region. We analyzed the quality of life according to the main living environments of the population and the parameters of its public health as exemplified by Irkutsk oblast for 2005 and 2018. All heterogeneous indicators are given in one measurement system – a rating, where the positions of Irkutsk oblast are determined in comparison with other constituent entities of the Russian Federation and regional trends are identified. The method of indicative analysis was used as an additional method. The assessment showed that the main macroeconomic indicators the region is in the top twenty ratings of leading regions among the subjects of the Russian Federation over the period under review. By the main parameters of the living standards Irkutsk oblast significantly worsened its position by 2018 and entered the top twenty outsider regions. By the level of environmental pollution, the region also belongs to the outsider regions, consistently occupying the last places in the rating. The cumulative impact of environmental quality is reflected in low level of public health. Within the framework of social security of population, we identified several threats: high level of poverty and unemployment, morbidity and mortality.
Vegetation features of the Olkha tableland
Authors: Korolkova E E 
Published: January 2021

Abstract
The vegetation of the Olkha tableland is located on the border of the Central Siberian subtaiga light-coniferous and South Siberian mountain-taiga dark-coniferous plant forms. The interpenetration of elements of these two large plant coenotypes leads to an increase in the flora-cenotic diversity and is of particular scientific interest. Currently, the entire territory of the tableland is included in the zone of active forestry use, which leads to serious disturbances and complete destruction of plant communities. Using the method of geobotanical mapping, a detailed study of the structure and dynamics of extension, an assessment of the disturbance was carried out, and the flora-cenotic diversity was revealed. Thanks to cartographic visualization, it can be seen that the distribution of plant communities in the territory is 50% subordinate to the altitudinal-belt subordinates. Microclimatic conditions play a great role in the change in the structure of indigenous vegetation, reflecting the features of the topography. Potentially, the territory is characterized by a predominance of dark coniferous and mixed dark coniferous-light coniferous forest communities. Approximately 15% of the territory is occupied by bog plant communities. There are also stone runs, stony placers, and rocky outliers uncovered by closed plant communities. Almost 76% of the vegetation of the plateau is represented by secondary (disturbed) small-leaved and coniferous-small-leaved forests, which are the result of active forest industrial use.
Where are the North Atlantic fish going, and where should fishermen go?
Authors: Li Chengxin , Zhao Liangchen , Li Dongyun , Chang Chenyang , Chen Jiakai , Jiang Chenlu 
Published: January 2021

Abstract
On September 23, 2019, the World Meteorological Organization WMO published the Global Climate Report 2015-2019, which explained the trend of global warming. The phenomenon of rising global ocean temperature in the report is also an issue that needs to be researched. It will make certain marine life be forced to migrate from their habitats, thus affecting the development of economic industries such as fisheries. As consultants to the Scottish North Atlantic Fisheries Management Association, in this work, we have launched a corresponding study on this issue. Corresponding mathematical models have been established, which can well predict the future distribution of fish populations. Questions are essentially predictions of the future distribution of North Atlantic fish stocks and their impact on fishing companies. So our first task is to build an identification and prediction model of future fish habitat space model (IPM-FFHS Model). Because this distribution is caused by changes in ocean temperature, we have established a prediction model for the average sea surface temperature of the North Atlantic region (AMO-BP Model) based on BP neural network to predict future SST. At the same time, other influential factors of the distribution can modify the model. The AMO-BP Model was then combined with the current distribution of the habitat of the fish to draw a predicted spatial image of the future habitat range. At last, we combined the IPM-FFHS Model to obtain the abandonment temperature threshold of the fishery to obtain the duration of fish migration and the survival environment under different effects.
Sensitivity Study on Influencing Factors of Coupled Motion Characteristics for Truss Spar
Authors: Shen Wenjun , Tan Zhonghua , Hu Chuanqi 
Published: January 2021

Abstract
In the absence of mooring condition, the heave and pitch coupled equations are established considering the effect of static stability and wave surface elevation for a truss spar platform. The influence of the change of the pitch period and the external excitation force (combined wave loads and wind loads together) on the stability of the heave-pitch coupling motion is studied by means of numerical iteration method. The results show that when the wave frequency is close to the natural heave frequency besides the heave-pitch frequency ratio is close to 2: 1, both of the amplitude of heave and pitch motion are increased considering the wind loads. It is about 12 percent increase for heave motion, while 8 percent for pitch motion. Meanwhile, there is a penetration phenomenon between heave and pitch. And the wind load play a more important role in pitch motion, the characteristic frequency of pitch motion will have an obvious change between 1/2 times sub harmonic motion frequency component and 1 time forced motion frequency component considering the wind load.
Technologies on Safe Construction Ventilation of Long-large Shield Tunnel with Low Gas in Metro
Authors: Zhao Wei , Meng Qingming , Liu Qi , Zhang Mengheng , Li Wei 
Published: January 2021

Abstract
Taking the project of long-large shield tunnel with low gas in Xingtian section of Chengdu Metro Line 18 as an example, A new construction ventilation method is established, which includes: the main tunnel ventilation with axial fans installed at the entrance of the tunnel and the local ventilation with jet fans installed in the shield and at the upper part of the bridge and the top of the 4# trailer for the rear supporting system; the connecting passage ventilation with a jet fan installed on the wall; the crossing ventilation with a jet fan installed in the middle of tunnel. The ventilation technology for safe construction of Metro long-large shield tunnel with low gas is established after detailed calculation of the fan selection, which is applied to finish safely and quickly construction task, and which provides reference for similar projects in the future.
Technology on Settlement Control of Large Diameter Shield Traversing Closely Beneath High-pressure Gas Pipeline for Metro Tunnel
Authors: Li Xinqiang , Wen Renguang , Li Wei , Pan Zhiwei , Wang Fuqian , Shen Peng 
Published: January 2021

Abstract
Taking the project of sectional tunnel traversing closely beneath high-pressure gas pipeline on Weiqing Line between Xinglong Station and Tianfuxin Station in Chengdu Metro Line 18 for an example, the technology controlling the settlement is studied. Based on the reinforcement isolation grouting with inclined boreholes, driving control parameters of shield and grouting behind the sectional tunnel lining with deep holes, the control technology on the large diameter shield passing closely beneath high-pressure gas pipeline is established for metro tunnels. The application of this technology controls the settlement of high pressure gas pipe within - 4mm, less than - 5mm, which verifies the practicability of this technology. At the same time, it greatly improves the stability of pipeline, guarantees the safety of pipeline operation, and provides the reference for similar projects in the future.
Smart Shoe Storage Controlled by One-Chip Computer
Authors: Liu Yuxi , Zang Tianshuo , Xu Bingzhou , Wu Xinyi , Qian Yizhen 
Published: January 2021

Abstract
This product is a smart shoe cabinet, which is designed for domestic shoes storage and brings convenience for families to put shoes. Its mechanical structure mainly includes a drive module, a shoe rack module and a seat module. The electrical control part mainly includes 51 SCM, Raspberry Pi and various sensors. This shoe cabinet adopts a unitized module design. According to the demand of the residents for the shoe cabinet, this Smart Shoe Storage can be combined casually at the users’ will and unitized to make it suitable for various apartment types.
Evaluation and Analysis of RT Suspected Defects on Reactor Pressure Boundary Weld
Authors: Yang Bo , Deng Qiang , Chen Cong , Zhang FengShou 
Published: January 2021

Abstract
The control rod driving mechanism (CRDM) is one of the important equipments in the nuclear reactor, and its sealing shell is part of the pressure boundary of the nuclear reactor. The sealing shell is a pressure vessel made of two different material (austenitic stainless steel and nickel base alloy) cylinders welded by dissimilar metal welds. Product production process, in this dissimilar metal weld ray detection found suspected defects show. In this paper, the mechanism and process of the suspected defects are expounded through experimental verification, and it is proved that the suspected defects do not affect the quality of the weld.
Research on control strategy of hybrid electric ship based on minimum equivalent fuel consumption
Authors: Liu Han , Wang Yucheng , Gao Diju 
Published: January 2021

Abstract
In order to improve the economy of the hybrid electric-electric ship, the parallel hybrid electric ship is taken as the research object, and an energy control strategy of the electric-electric hybrid ship based on the minimum equivalent fuel consumption is proposed. The efficiency factor and its correction function are used to maintain the balance of battery power, and the target optimization function is adjusted to control the power consumption rate of the power battery, thereby realizing the optimization of the control strategy for the traveling ship. Finally, Matlab/Simulink is used for simulation. The experimental results show that when the control strategy with the minimum equivalent fuel consumption is used, the fuel consumption is 1.95L less than the CD-CS-based strategy, and the fuel saving rate is 31.2%. At the same time, the engine and motor work Efficiency is greatly improved.
Study on Chlorophyll Content in Visible-Near Infrared Spectroscopy
Authors: Liu Jinbao , Zhang Lu 
Published: January 2021

Abstract
Chlorophyll, as an important factor for the normal growth and development of plants, is of great significance for the management of agricultural water and fertilizer. In this study, the chlorophyll content of maize leaves was taken as the research object, and the chlorophyll content prediction model was quantitatively studied. ASD FieldSpec Pro spectrometer was used to measure the spectral reflectance of the leaf samples, and the spectral curve characteristics of different contents were analyzed. The results show that: (1) The reflection spectrum undergoes the nine-point smoothing of Savitzky-Golay and combines with the MSC, NOR, and SNV transforms to significantly increase the signal-to-noise ratio of the reflection spectrum. The combination band with higher correlation can significantly improve the stability and prediction of the model ability. (2) In the PLSR model, MSC processing is performed on the smoothed spectrum, and the model established after the second-order differential transformation has the best effect, Rc2 = 0.95, RMSEC = 2.32, SEC = 1.35.
The Pressure Control of High-pressure Tubing
Authors: Chen Hongliang 
Published: January 2021

Abstract
This article mainly studies the pressure control of high-pressure tubing. Based on the theoretical basis of the pressure formula, a pressure variation model based on the pressure formula is established and solved by the enumeration method within the range. In the process of solving the model of the open time of the one-way valve in the problem, first, establish a model of the pressure change of the inlet and outlet oil. Using integral thinking, we get the oil density under each pressure. Based on the tubing pressure requirements in the corresponding time period together with the relationship between the net mass of the inlet and outlet oil per unit time, the relationship between the opening time of the inlet valve and the pressure is obtained by using the principle of the inlet valve opening time to control the inlet mass. The results of the corresponding pressure requirements are obtained through the enumeration method within the range.
Research on Optimization of Key Parts of Nuclear Reactor Based on Finite Element Simulation
Authors: Yang Bo , Yu Tianda , Deng Qiang , Chen Cong , Zhang Fengshou 
Published: January 2021

Abstract
In view of the higher technical requirements of the third generation PWR for the control rod drive mechanism (CRDM), China's third generation nuclear reactor CRDM hook parts are designed to multi-tooth hook with wear-resistant surfacing. The surfacing welding process is simulated and optimized based on finite element simulation, and reasonable welding process and parameters are determined by simulation results in this paper.According to the optimized welding process, the parts are trial-produced, and the parts of the hook are subjected to metallographic inspection, hardness test and thermal life test. The results show that the optimized hook parts have high hardness and wear resistance, and meet the requirements of the third generation PWR nuclear power plant.
Solar PV Market Research and Industry Competition Report
Authors: Zhang Jiaxuan 
Published: January 2021

Abstract
Solar Industrial scale continues to expand. The world installed photovoltaic capacity gradually increased from 135GW in 2013 to 480GW by the end of 2018, achieved 3.5 times growth during five years. There will be still have space for price reduction. With the development of solar cell structure design, micro-nano laser precision machining and other technologies, the per-kilowatt cost of photovoltaic power generation has entered decline channel, and it is expected to realize the affordable online in the future. According to IHS, the price difference between PERC single crystal components and polycrystal components is $0.055 per watt. Industrial technology has made obvious progress, and single crystal PERC has become the mainstream. The efficiency of the cell is breaking new records. The conversion efficiency of ordinary single-crystal and polycrystalline cells has reached 20.2% and 18.6% respectively, and the efficiency of high-efficiency batteries has reached 21.3% and 19.2% respectively. According to data released by Solarbe, the single crystal PERC technology performs best in cell conversion efficiency and output power compared with other technologies. In the next four years, China's market growth will remain stable at 40-50GW. IHS Markit forecasts that the global market size is expected to remain stable at 100-120GW from 2018, while the growth of the Chinese market will remain stable at 40-50GW in the next four years.
Research on Parameter System Identification Characteristics of Physical Exercise Population in Gansu Province Based on Walking and Taijiquan
Authors: Guo Qiurong , Zhang Wanjun , Gou Xiaoping , Li Bingze , Yang Chunhua , Yang Aihong 
Published: January 2021

Abstract
Walking, Taijiquan and other urban sports in Gansu Province is an important factor to improve the quality of competitive sports. In this paper, the characteristics of parameter system identification of urban sports population in Gansu Province are established, and the development characteristics of all social strata of urban sports population in Gansu Province are investigated by mathematical statistics and MATLAB simulation. It provides a reference for the study of urban physical exercise population in Gansu Province. The simulation results verify the feasibility and effectiveness of the parameter system identification method of the urban physical exercise population in Gansu Province, which has important application and reference value in the theoretical research of scientific research. In order to promote the harmonious development of all social strata, we should establish the correct orientation of gender value and strengthen the construction of sports ecological environment.
Research on the thermal characteristics of steady-state energization of pressure-controlled materials used in transfer fault current limiters
Authors: Sun Chao , Dong Enyuan , Zhang Liyan , Zhu Yu , Xue Shutian 
Published: January 2021

Abstract
In recent years, there have been more and more researches on fault current limiters. Pressure-controlled materials with piezoresistive effect can be used in current transfer type fault current limiters. Titanium diboride powder is a material with piezoresistive effect, and its resistance is negatively correlated with pressure changes. In the current transfer type fault current limiter, The pressure-controlled materials is the main branch of the current transfer circuit. A large amount of heat will be generated in the steady-state current working state, in turn, the temperature rise in the pressure-controlled materials container continues to increase. On the one hand, excessive temperature rise will affect the resistance of the titanium diboride powder, resulting in the actual flow capacity not reaching the design standard; On the other hand, the accumulation of heat in the material will accelerate the aging of the material and the outer container, thereby reducing the actual service life and even affecting the material's insulation performance and causing safety hazards. This article focuses on the characteristics of the piezoresistive effect of titanium diboride powder, use permanent magnet-repulsive mixing mechanism to provide holding pressure for it. Study the long-term through-flow heat effect with pressure under the cylindrical parallel through-flow container. According to its heating and structural characteristics, several heat dissipation methods are proposed in combination with simulation, and the experiments are carried out. Through simulation and experimentation, The installation of vertical heat sinks and the simultaneous application of industrial fan cooling can effectively reduce the current heating effect. It has important guiding significance for its use in the field of current transfer and current limiting to achieve long-term current flow.
Photovoltaic Power System Fault Warning based on State Assessment
Authors: Wang Dong , Xie Xiangying , Na Zhixiong , Shen Wentao , Fan Xuening 
Published: January 2021

Abstract
The stability of photovoltaic power system is very important. A small fault in one component can cause a large damage on the whole power system. This paper aims to propose a method to evaluate the stability of photovoltaic power system so that we could take measures in advance to avoid greater losses. This paper studies how we assess the status of a power grid. To assess the status of power grid, we select some fault which is often occur in photovoltaic power system. Then we build a fault tree based on the photovoltaic power plant network. Finally, we substitute the probability of various faults into the fault tree for analysis and prediction. According to probability of failure at this moment and coefficient, we can calculate how the system running at this moment. In this paper, the early fault warning of photovoltaic power system: firstly use machine learning methods to pre-process the original data, eliminate redundancy and noise, then run regression analysis on pre-processed data and get the failure rate of a certain time. Take the example of a photovoltaic power system in China, through learning and verification of fault data, our method can effectively realize the early fault warning of photovoltaic power system.
Simulation and Test of Spindle Mode of Planetary Variable Speed Device
Authors: Zhang Qiang , Li Shenlong , He Rong , Li Hongwu 
Published: January 2021

Abstract
Spindle is the main bearing part of high speed tracked vehicle transmission device, which needs to carry large power and torque. Modal testing can provide basis for the verification and modification of the dynamic model of transmission structure, response prediction, vibration control, qualitative analysis and dynamic coupling analysis of transmission system. In this paper, the mode of the spindle is simulated by finite element method, and the free mode of the spindle is tested by hammering method. The results show that the modal mode simulated by finite element method is consistent with the mode tested, and the error range between the measured modal frequency and the simulated modal frequency is less than 3%. The simulation and test of spindle mode have important theoretical significance and engineering application value for realizing the optimal design of spindle.
Driver Cell-phone Use Detection Based on CornerNet-Lite Network
Authors: He Anqing , Chen Guohua , Zheng Wei , Ni Zhenhao , Zhang Qingqing , Zhu Zhongjie 
Published: January 2021

Abstract
Driver requires a high level of concentration when driving at high speed. Cell-phone use while driving can cause serious problems. To solve this issue, this paper proposes a proposal scheme about driver cell-phone use detection based on CornerNet-Lite Network. The scheme can eliminate the traffic accident risk caused by cell-phone use through detecting driver cell-phone use. The scheme includes two stages: model training and simulation test. Firstly, the data set of cell-phone use was established. Secondly, the data set was preprocessed by the preset processing method. Finally, the CornerNet-Lite network architecture was optimized to reduce the training time and improve the detection accuracy and real-time detection. Through a large number of experiments, the results showed that the scheme had a good detection effect, with the accuracy of 86.2% and with 30fps. Under the noise interference of simulated cab environment, it still had a high robustness.
Smart Operation and Maintenance Platform of Protection Relay Based on Mobile Sensing and Big Data
Authors: Liang Wenwu , Ouyang Fan , Wang Shannuo , Zhu Weijun , Li Gan 
Published: January 2021

Abstract
In order to solve the current network limitations and human-computer interaction limitations of relay protection and automation in power systems, an intelligent operation and maintenance management platform for electrical secondary equipment based on mobile sensing and big data is proposed. First, the existing problems in the standardization operation and data integration in the relay protection work at this stage are explained, and the significance of the construction of this platform is pointed out. Then the application modes of mobile sensing technology and big data technology in power system is analyzed, proposing the system architecture and functional architecture of the system, and the interaction mode between the mobile terminal and the master station in the system is explained. Finally, the specific functions of the system's standardized operation process and intelligent operation inspection are explained, and the effects of the intelligent operation and maintenance control of the secondary equipment under the original mode and the new mode are compared.