bluuebunny/crossref_metadata_2025 huggingface dataset:
Thoughts on the Construction of Power System Based on Computer Simulation Technology
Authors: Huo Huizhi
Published: July 2020

In the power system, experiment is one of the most critical components. In the past experimental work, because of the inability to master the equipment, limited hands-on ability, lack of experimental steps and experimental ideas, many experiments could not be successfully completed, electronic and electrical experiments are the key to relevant personnel to improve their practical ability way. If it is a mistake in the experiment, it will cause damage to the equipment and it will also endanger the safety of the experimenters. Therefore, the use of simulation technology in experiments is of great significance. Therefore, it is of practical significance to analyze the electronic and electrical experiment simulation technology.
Comprehensive Application of Microlecture Technology in College Ideological and Political Education
Authors: Zeng Ji
Published: July 2020

“Microlecture technology” is a new education model rising at home and abroad in recent years, which is effective and worth learning and promoting. In this paper, the microlecture is introduced to college ideological and political education to explore the feasibility of the teaching model design for college ideological and political education based on microlecture. The design principles are established based on the objective law of teaching and the features of ideological and political courses to establish a four-level experience model, an innovative and systematic teaching model based on the microlecture technology, thereby improving the effectiveness of college ideological and political teaching.
RETRACTED: Research on Aging of the LNG Powered Ship Based on Computer Technology and Influence on Engine Performance
Authors: Guo Jia
Published: July 2020

The ship’s LNG power system is a key part to ensure the normal operation of the ship. Every key part of the ship will be commanded by the LNG power system. In the part that this article focuses on, the main components of the marine engine LNG power technology are the LNG power ignition system, electronic fuel injection system and idle speed control system. The working principle of marine engine LNG power technology first controls the commands issued by the control system through internal sensors, converts the commands into electrical signals through the command input device and transmits them to various electronic control units. Then the control unit processes the signals and finally the actuator Turn each command from the LNG power unit into a specific control operation for the ship. LNG power technology has a huge impact on the entire shipbuilding industry, improving the performance and kinetic energy of ship engines, reducing ship energy consumption, reducing exhaust gas emissions and reducing pollution. This article studies them.
Research on the “Three Docking” of Modern Apprenticeship Curriculum Standard and Professional Post of Automobile Specialty based on the Big Data Technology
Authors: Song Jiali , Du Liping
Published: July 2020

Experience shows that employability is very important in occupational activities, especially for manual jobs, such as automobile jobs. However, at present, there is a disconnection between the courses of automobile majors in some schools and the demand for vocational positions, which does little to improve students’ employability. Therefore, based on the computer big data technology, this paper analyzes the existing curriculum standards of modern apprenticeship for automobile majors, and explores how to realize the three-way docking between the curriculum standards of modern apprenticeship for automobile majors and vocational posts under the condition of the Internet.
Business Design of Human Resource Management Based on SAP-HR System and Human Resources Management Software
Authors: Xu Jingwei
Published: July 2020

With the arrival of the information age, human resource management (e-HR) came into being, thus promoting the transformation of human resource management, from administrative affairs management to strategic human resource management, at the same time greatly improve the work efficiency and technical content of enterprise human resource management, the purpose is to achieve the innovation of enterprise management concept. The emergence of human resource management (e-HR) as a new human resource management mode is conducive to the improvement and reform of human resource management. With the rise of e-commerce and the development of computer networks, the competition between enterprises has gradually shifted from the tangible market to the virtual network world, and the corresponding enterprise management cannot stand still, but also into the track of information. Now more and more enterprises realize the importance of information management and implement the ERP system. Among all the resources that need to be integrated, human resources are undoubtedly the most important one and is becoming more and more important.
The Exploration of the Construction of University Art Talent Information Platform Guided by Students’ Personalized Development
Authors: Yu Jun
Published: July 2020

With the improvement of the national economic and the quality of people’s life, art has gradually become an important part of people’s life, and the importance of artistic talents has gradually become prominent. As an important place for the cultivation of artistic talents, the university plays a vital role in the cultivation and utilization of artistic talents. Under the background of the new era, the continuous advancement of the social information construction process has also accelerated the construction of art information platform in universities. This paper briefly describes the basic connotation and important significance of personalized development. And based on the actual situation, it puts forward some active strategies for the construction of college art talent information platform.
Research and Development of Measurement and Control System of New Energy Vehicle Computer Technology Test Bed
Authors: Liu Lesheng
Published: July 2020

At present, with the increasingly prominent environmental problems, the automobile industry is gradually transforming to meet the increasingly stringent environmental requirements, and more and more new energy vehicles are put into use. This paper analysis the function of the new energy automobile test-bed: after combined with computer technology, research and development of multi-channel real-time dynamic data acquisition and analysis system. Finally the article discusses the combination of computer technology test measurement and control system design are verified. It provides a reference for measurement and control research of new energy automobile test-bed.
Research on the Translation Teaching System of English Majors Based on Big Data
Authors: Li Lihui
Published: July 2020

In the era of big data, with the rise of online media and the wide application of mobile terminals in education and teaching, more and more students rely too much on convenient mobile devices such as tablets and mobile phones to search for videos, audio and text that match their preferences. The network English translation learning resources, over time, lead to resistance to the traditional translation course teaching methods. Especially when teachers use traditional methods to present teaching resources that are duplicated with online resources in the classroom, students will be more resistant to traditional English translation teaching. In this era, the English professional translation course will usher in a new round of teaching reform, and then the author will carry out detailed analysis.
LED Solar Spectrum Computer Simulation Based on Non-dominated Sorting Genetic Algorithm
Authors: liu Lin
Published: July 2020

The solar computer simulation technology has been extensively applied in the fields of polymer curing test, solar cell detection and calibration, and satellite heat balance test, etc. The non-negative least-squares solution of the overdetermined equations based on the non-dominated sorting genetic algorithm (NSGA) to optimize the monochromatic light-emitting diode (LED) matching light source combination, replace some monochromatic LED with white LED to simulate the solar spectrum, and discuss several LED lights with different peak wavelengths that can be replaced by white LED. The simulation results suggest that in the range of 300 ∼ 1100 nm, as the monochromatic LED types replaced by white LED increase, the total number of LEDs used is reduced, and the spectral match decreases. When LEDs with three different peak wavelengths are replaced, the correlation index in the fitting based on the algorithm is 0.9035, where the number of LEDs can be reduced by 15.6%, and the simulation spectrum is basically consistent with the target one. The proposed method has a small spectral mismatch and can be used to distinguish two absorption valleys of the standard solar spectrum AM1.5 accurately.
RETRACTED: Application of New Economic Environment Based on Computer Technology in Management Accounting
Authors: Tong Ling
Published: July 2020

To start with the development and application of management accounting in China and combining with the characteristics of new economic environment, this paper points out the far-reaching influence that the new economy and new technology environment have brought to the industry. Based on the deep analysis of the current situation, the necessity of applying computer technology to management accounting method is pointed out, and the problems to be solved and the direction of innovation are clearly combed, in order to make the financial practice of enterprises more realistic and feasible.
Application of Computer Technology in the Study of the Relationship between New and Old Kinetic Energy Conversion and Competitive Advantages of Service Enterprises-based on the Coordination Process
Authors: Kong Lingming
Published: July 2020

The “new and old kinetic energy conversion” is a national development idea recently proposed by Chinese government. New and old kinetic energy conversion is closely related to the competitive advantages, especially in service enterprises. Coordinated process theory is presented in this paper, on the basis of empirical research, by combining computer technology shifts the kinetic energy is discussed and the service enterprise competitive advantage of internal relations, set up a new kinetic energy conversion relations with service enterprise competitive advantage model, the model reveals the service enterprises to keep up with the old and the new kinetic energy conversion power source, is for government departments to promote the old and new energy transformation provides a effective method. At the same time, the application of computer technology in the transformation of old and new drivers in service enterprises is studied.
RETRACTED: Research on the Construction of New Mode of Mental Health Education for Higher Vocational College Students Based on Computer Big Data Technology
Authors: Jiang Lingzhi
Published: July 2020

At present, the development of higher vocational education has become a hot issue in the whole field of education. At the same time, mental health education for college students in higher vocational colleges has also received extensive attention, especially how to improve the psychological quality of college students through effective mental health education mode. Under this background, this paper analyzes the mental health of college students in higher vocational colleges by using computer big data technology, and explores the construction method of the new mental health education model for higher vocational college students based on computer big data technology.
Research on the Application of Computer Audit in Colleges and Universities
Authors: Wang Liyuan
Published: July 2020

Due to the uncertainty of audit environment and audit work, the development of audit software in colleges and universities in China has been troubled for many years, but in recent years there has been a breakthrough and significant progress has been made. At the same time, with the rapid development of information technology and the increasing popularity of accounting computerization, audit means have gradually transferred from traditional manual audit to computer audit. To carry out computer audit has become an urgent task faced by audit institutions and auditors in colleges and universities in China[1].
Design of Intelligent Agricultural Greenhouse Monitoring System Based on 5G Network Cloud Platform
Authors: Xiang Mojun
Published: July 2020

At present, the control of greenhouse environment of agricultural greenhouses in China mainly depends on artificial and simple equipment. This situation shows that our agricultural management lacks scientific technology. Production management lacks scientific equipment. With the continuous development of information technology of logistics network, the monitoring system of intelligent shed has been invented. The emergence of intelligent monitoring system has also been widely concerned by people. This paper studies the design of the monitoring system of intelligent agricultural greenhouse based on the cloud platform of 5G network technology, and finally draws the corresponding conclusion.
Research on the Controllability of the Sound Wave of Automobile Whistle Combining Computer Technology and Sound Dispersion Mechanism
Authors: Qi Peng , Song Jiali
Published: July 2020

At present, the popularity of cars has brought great convenience to our life, but at the same time it has brought about many bad effects, such as noise pollution caused by the sound of car horns. Therefore, it is very important for us to study the controllability of car horn, and the mature development of computer technology provides us with the research conditions and convenience. In this paper, the controllability of sound wave of car horn in two-dimensional space is studied by combining computer technology with sound diffusion mechanism, and a kind of noise thermometer invented by American scientists is taken as an example.
Research on Assembly Building Design and Construction Management Based on Computer Building Information Model
Authors: Zhu Qinglong
Published: July 2020

In the decades after the emergence of computer building information model, the construction industry in China is developing rapidly. With our familiarity with high-end technology, the application of computer building information model has been recognized and advocated by the government and the construction industry. In this paper, the process and construction management system of prefabricated building design based on computer building information model are studied.
Research on English Teaching Transition between Rural Primary Schools and Secondary Schools in Light of Computer Multimedia Technology
Authors: Zhao Qiuying
Published: July 2020

With the development of science and technology, especially the development of computer network and multimedia equipment and technology and popularization, the application of multimedia in rural primary and middle school English class is becoming more and more be taken seriously, it makes full use of images, text, practicality, sound, animation, and other forms convey information to all students, auxiliary classroom teaching and the teaching of cohesion, changed the traditional pattern of rural primary and middle school English teaching, so this article through to the analysis of the rural primary and secondary school English traditional teaching mode, called for English teachers is clever use of multimedia means, optimize English classroom teaching, such as: reasonable use of courseware, stimulate students view hearing; Using multimedia to create language scenes; Make full use of multimedia to improve students’ listening and speaking ability; The method of audio-visual education is used to cultivate students’ ability of independent learning and to optimize their way of thinking. However, there are also the following deficiencies in the application of multimedia: some teachers attach too much importance to multimedia and neglect the conventional teaching methods; their teaching skills are lagging behind; they misuse or abuse multimedia; their courseware contents are too flashy; and students’ interests are transferred. We English teachers should learn to use multimedia correctly and combine with other teaching methods to improve teaching efficiency, which plays a positive role in the cohesion of English teaching in primary and middle schools in rural areas.
Study on Microcosmic Action Mechanism and Road Performance of Coal Gangue Powder Asphalt Mortar Depending on Computer
Authors: Hu Rong , Zhou Yan
Published: July 2020

As the largest amount of industrial waste, people have been unable to recognize the use value of coal gangue. In many industries, gangue has no main use. However, in the process of road construction, the use of coal gangue has been recognized by people. Because of its high hardness and good water stability, gangue can be used as a material for subgrade construction. In order to broaden the application prospect of coal gangue in road engineering, this paper analyzes the application performance of asphalt mortar with coal gangue powder as the main component in road engineering, and finally draws a conclusion.
Teaching Reform of Applied Technology University Physics Based on Computer Aided System
Authors: Li Rong , Zheng Lang , Ren Ximei
Published: July 2020

Physics application practice is of great significance to the application of Physics and the cultivation of basic scientific research talents. With the continuous improvement of technology value cognition in the basic industry of China, the improvement of manufacturing industry competitiveness and the realization of innovation are inseparable from the participation of physical application technology. However, according to the results of industry research in recent years, the contribution rate of university Physics to society in China is far from expected, and there is still a lot to improve in the teaching of university application technologies and application practice abilities, which should focus on the future teaching. With the continuous exploration of Chinese computer education technology and data-base teaching technology, the teaching methods in colleges and universities have been greatly changed. According to the research, the current rate of online reading habits and communication habits of college students in China is up to about 67.9%. The demands of students’ independent growth and the needs for society comprehensive talents make college Physics undertake more training responsibilities and ability teaching tasks. As an important medium of college teaching, the development and application level of computer-aided system has a certain impact on the teaching effect of college Physics. At present, the CAI system with multimedia courseware as the core couldn’t meet the needs of students’ study. Therefore, it is necessary to design and deal with the CAI System in a more diversified way. Because of its high abstraction, theory and comprehensiveness, the past teaching practice of college Physics is difficult to achieve high results. Therefore, based on the computer aided system, this paper explores the reform direction and feasibility realization mode of applied technology college Physics teaching.
Transaction Decision Model of Wind and Storage Joint System in Spot Market
Authors: Chen Xiaodong , Cui Dai , Cong Haiyang , Jiang Di , Zhan Keming , Wang Zhonghui
Published: July 2020

This paper is focus on the application of energy storage on the power side to participate in the consumption of clean energy. First, the impact of energy storage on the consumption of clean energy on the power side will be analyzed. Then, a real-time spot market decision-making model of energy storage participating in clean energy is established. Finally, the effectiveness of the proposed optimization is analyzed through simulation examples to verify the positive role of energy storage on the power generation side and clean energy consumption on the participation side.
Visualization Research of Sichuan Liquor Brand Personality Traits Based On Big Data Analysis
Authors: Zu Xu , Duan Renji , Gou Qingxin
Published: July 2020

This paper applies the research results of visual analysis to the field of brand personality research. Taking seven e-commerce platform products representing Sichuan liquor brand as the research object, the combination of social network analysis and co-word analysis is used to quantify high-frequency characteristics, revealing Sichuan liquor brand personality shaping propositions, and helping enterprises further differentiate their brand personality.
Measurement-Based V2V Channel Characteristics at 5.9 GHz on Urban Crossroad
Authors: Zou Hanyi , Li Changzhen , Yu Junyi , Chen Wei , Chang Fuxing , Yang Kun
Published: July 2020

This article present single-input-single-output (SISO) measurement results of vehicle-to-vehicle (V2V) radio channel in an urban crossroad scenario at 5.9 GHz, where the measurement vehicles driving in vertical direction. Besides, radio channel characteristics include power delay profile (PDP), channel gain and delay spread also were conducted. Moreover, the lack of line of sight (LOS) path due to the roadside buildings can case 9 dB attention loss in channel gain and around 130 ns increase in root mean square (RMS) delay. The influences of roadside buildings on V2V radio channels cannot be ignored. All the conclusions drawn in this article have guiding significance for the design of Intelligent Transportation System (ITS).
Optimal Benefit Strategy of Clean Energy Consumption Based on Transmission Channel Constraints
Authors: Zhang Qinpeng , Yang Jiaqi , Tu Mengfu , Ding Qia , Tian Hongjie
Published: July 2020

With the continuous development of social economy, energy and environmental issues deserve more and more attention. In order to improve the new energy’s consumption, this paper proposes an optimized social income strategy for clean energy consumption based on transmission channel constraints. The main method combines the method of cooperative game to maximize the value of social income, so as to determine the optimal combination of power generation, then taking into account the constraints of transmission channels and other issues, and then solving the problem of cross-regional clean energy trade with the goal of maximal social benefits. At the same time, the proceeds from the cooperative game can be distributed to each power transaction entity through the method of nuclear solution.
Investigation on Small Current Resistivity Measurement of Graphite Electrode Body
Authors: Zhong Wenyu , Wang Yongjiang , Tang You
Published: July 2020

Graphite electrode resistivity measurements of ontology is the last line of carbon product enterprise important parameters in the production process of testing process, in the decades of testing technology in the process of continuous development, appeared many kinds of test methods and test system, each have each advantage, each have each characteristic, first introduced in this paper, from the early large current test system, to the analysis of current detection and finally draw a high cost performance measurement methods and measuring current.
Discussion on the Key Points of Optical Cable Line Construction Technology in Optical Fiber Communication Engineering
Authors: Gao Feifei
Published: July 2020

In the construction process of optical fiber communication engineering, it is necessary to pay attention to how to improve the construction technology of optical cable line, so as to ensure the construction quality of optical fiber communication engineering. Based on the effective work practice, this paper summarizes the application precautions of optical cable line construction technology in optical fiber communication engineering, and also puts forward the technical points.
Mechanism Analysis of Small Box Girder Diseases and Summary of Reinforcement Treatment Strategies
Authors: Li Kuan , Zheng Yuanxun , Liu Chengyong
Published: July 2020

With the vigorous development of bridge construction in China, the structure of bridges is also more abundant. Among them, the prefabricated small box girder has been widely used in engineering fields at home and abroad due to its large section torsional strength, bending strength, and low cost and fast construction speed. However, due to poor design and improper construction in the early stage, coupled with the vehicle over-aging and inadequate material maintenance, the prefabricated small box girder bridges have different degrees of disease, how to study the disease generation mechanism and take targeted reinforcement. The treatment strategy is related to the safety of transportation in China. In this paper, the statistical analysis of the disease of small box girder in active service is carried out, and the mechanism of various diseases is analyzed and summarized. On this basis, the common methods of reinforcement and treatment of small box girder in China are comprehensively analyzed. The research results of this paper have important reference value for mastering the causes of the disease of small box girder in China’s expressway and the corresponding reinforcement strategy.
The Fast Algorithm of Running Stability in Mechanical Analysis of High Speed Railway
Authors: Wang Jinhua
Published: July 2020

The running stability of high-speed railway is the goal of operators and vehicle manufacturers, so the running stability of high-speed railway is an important part of vehicle dynamics analysis. The stability analysis involves a lot of working conditions and suspension parameters, and the analysis workload is huge. Therefore, in this paper, the random vibration and running stability of high-speed trains are taken as the research object, and the relevant fast algorithm of responding to the power spectrum of high-speed railway vehicles is derived through the virtual excitation method, so as to realize the running stability research of high-speed railway vehicles. In this paper, the vertical and horizontal response power spectrum and stability index of a high-speed train are analyzed. Finally, the stability index is used to analyze the dynamic performance of the train at the same time, and the line test results of the dynamic performance of the train are evaluated. The research results show that the simple and efficient analysis algorithm is helpful to improve the analysis efficiency and reduce the simulation calculation time.
Neutral Grounding Fault Line Selection Algorithms for Low Voltage Side of Distribution Transformers in Civil Buildings
Authors: Xu Jing
Published: July 2020

The neutral grounding fault line selection of low-voltage side of distribution transformer in civil buildings is of great significance in the field of power system. It is necessary to analyze the grounding fault of distribution transformer in civil buildings, calculate the current energy of distribution transformer by using the frequency coefficient of wavelet packet decomposition, and analyze the current fault components of grounding fault phase and sound phase, get the energy ratio of grounding fault current component, and complete the grounding fault of distribution transformer. Experiments show that the proposed algorithm can reasonably judge the fault line of distribution transformer nodes, and has a high accuracy in the selection of grounding faults.
Construction Quality Control of Highway’s Civil Engineering
Authors: Shen Zhifeng
Published: July 2020

In order to improve the construction quality of highway’s civil engineering, a construction quality control model based on self-adaptive equilibrium game is proposed to improve the construction quality of highway’s civil engineering. The constraint parameter model of construction quality control is constructed, and the fuzzy decision function of construction quality control of highway’s civil engineering is established by combining the game equilibrium method of cost control and quality control. The optimal control of the construction quality of highway’s civil engineering is realized by using the method of correlation constraint and autocorrelation game. The simulation results show that the model can effectively predict and control the quality of highway’s civil engineering, the precision is high, the construction cost is reduced and the construction quality is improved.
Rigid Dynamic Load of the Crane Lifting Mechanism When the Series Resistance Starts
Authors: Zhang Zhiqiang , Jin Haibin , Li Xing , Tian Jinjin
Published: July 2020

With the development of economy, industry and manufacturing industry play an important role in China’s economy. As the most extensive machinery in the industry and manufacturing industry, the development of crane will inevitably affect the development of the whole industry, so how to improve the performance of crane and how to carry out a wide range of analysis has become the current problem to be solved. Starting from the crane, this paper focuses on the study of the rigid dynamic load coefficient when the series resistance of the lifting mechanism of the crane starts, and analyzes the influence of these coefficients on the performance of the crane. In this paper, the big data analysis method is put forward firstly, and the change of rigid dynamic load coefficient when the chain resistance of crane hoisting mechanism starts in China’s industry and manufacturing industry in the past 10 years is analyzed. Secondly, the concept and classification of crane are briefly summarized. The crane is mainly divided into two types, one is tire crane, the other is bridge crane. Then this paper establishes the system model and the mathematical model of the crane lifting transmission system. Through the analysis of the system model, we can get the relationship between the rigid dynamic load coefficient α and φ, and the relationship between β and φ. Their relationship is that the growth rate of the rigid dynamic load is slowed down after α is greater than 5, and the starting torque multiple and the rigid dynamic load coefficient are linear.
Corrosion Failure Analysis of Electrical Equipment in Distribution Power System under High Temperature and High Humidity Environment
Authors: Shi Xuntao , Ke Qingpai , Lei Jinyong , Yuan Zhiyong
Published: July 2020

The problem of corrosion failure of distribution automation terminal in hot and humid environment is very prominent, which seriously restricts the development of smart grid in southern power grid. Therefore, this paper chooses three overhead FTU terminals as the research object to study characteristics of corrosion failure of distribution automation terminal. The corrosion failure analysis was carried out by SEM and EDS. EDS data showed that the content of oxygen in corrosion region was significantly higher than the slight corrosion region, the presence of sulfur and chlorine indicated that the corrosion environment was mainly a humid environment containing sulfur and chlorine. SEM found that the corrosion failure of terminal equipment is mainly due to the environment such as high temperature, humidity, chloride ion and sulfur. At the same time, the exposure of substrate is caused by the damage of plating layer or leakage plating which was further development of corrosion. Therefore, according to the corrosion characteristics of distribution automation terminal in hot and humid environment, the corresponding protective measures ensuring the safe operation of distribution automation system is proposed, which can extend the service life of distribution automation terminal and provide reliable basis for the future empirical test.
Effect of Saline-Alkali and Drought Stress on Seed Germination of Haloxylon Ammodendron*
Authors: Xu Te , He Kangning , Wang Hui , Zhang Tan , Chang Bo
Published: July 2020

Based on the problems of desertification and salinization in the Qaidam Basin, this paper studies the coupled stress of saline-alkali and drought conditions on the seed germination of Haloxylon ammodendron from Qaidam provenance, and clarifies the comprehensive effect of salt, alkali and drought stress on Haloxylon ammodendron seed germination vigor. It provides a reference for the research on the resistance of Haloxylon ammodendron and provides a theoretical basis for improving the breeding efficiency of Haloxylon ammodendron population in the area of bad situation.
Fault Diagnosis and Maintenance Skills of Electrical Control System
Authors: Lu Chengfei
Published: July 2020

With the advancement of industry and technology and the support of advanced technological processes, electrical control system has undergone tremendous changes. Various technologies constitute advanced technology, and their integration into electrical control system enables industrial business to be developed better. However, due to the late start of industrialization in China, there are still inadequate researches, and it is not mature enough to deal with faults in electrical control. The author first introduces the relevant content of electrical control system, then briefly introduces the electrical fault inspection and diagnosis technology, and finally discusses how to repair the electrical control system.
The Volcanic Rock Is Identified Automatically Using the Convolutional Neural Network
Authors: Chi Huanzhao , Xue Xiaogang , Dong Fuxiang
Published: July 2020

According to the well logging, drilling, and 3D seismic data, we identified the volcanic rock automatically by computer. The recognition system was an image recognition technology based on deep learning algorithm based on seismic data. During the identification process, the 3d seismic data are disassembled into 2d seismic profile by seismic interpretation technique in Dehui Fault Depression of Songliao Basin. And then, we think it was a two-dimensional picture as learning samples, classification of seismic data, establishment of labels, forming a training set. The training set is deeply learned to generate automatic recognition model. Finally, according to the generated automatic identification model, the volcanic rock is realized automatically based on seismic data.
Comparison of Catalytic Conversion Characteristics of Different Integrated Aftertreatment Systems in Diesel Engine
Authors: He Naifeng , Jiang Zhongfeng , Ning Zhi
Published: July 2020

Pollutants such as NOx, HC, CO, and PM emitted by diesel engines will cause serious air pollution. In order to reduce the exhaust emissions of diesel engines, there are mainly DOC, DPF, SCR, AOC, etc. for the after-treatment technology of the engine. Therefore, the use of integrated aftertreatment systems has become a necessary choice. At present, the layout schemes of integrated aftertreatment systems for diesel engines mainly include DOC + DPF + SCR + AOC, DOC + SCR + DPF + AOC, DOC + CDPF + SCR + AOC, DOC + SCR + DPF + AOC, etc. When processing the system, each sub-aftertreatment system will generate a mutual coupling effect. This coupling interference may promote the system’s conversion effect to the pollutants, and it may also weaken the system’s conversion effect on the pollutants. The catalytic conversion characteristics of the integrated aftertreatment system are closely related to exhaust parameters and layout schemes. In this paper, simulation methods are used to compare and study the effects of the above four integrated post-treatment systems on the catalytic conversion characteristics of various pollutants under different exhaust parameters.
A Marine Hydrographic Measurement System
Authors: Tan Bin , Liu Zheng , Li Bo
Published: July 2020

The marine hydrographic measurement system is used to complete the information measurement system of seabed topography, sea water sound velocity profile, flow velocity, flow direction profile, pressure and so on. In this paper, a marine hydrographic measurement system is described.
Process Optimization of Microwave-Assisted Extraction of Flavonoids from Salvia Plebeian Using Response Surface Methodology
Authors: Xu Botong , Tao Ren , Huang Zhichun , Zhu Dianfan , Liu Junxia
Published: July 2020

Flavonoids were extracted from Salvia plebeian by the microwave method, the process was optimized by Response Surface Methodology. On the basis of single factor experiment, ethanol concentration, microwave power, extraction time, material to liquid ratio were selected as independent variables, and the extraction content of homoplantaginin was selected as response value. The optimum extraction conditions of flavonoids from S. plebeian were determined by Box-Behnken response surface analysis. The optimum extraction conditions were that the ethanol concentration was 56%, the ratio of material to liquid was 1:30 g/mL, the extraction time was 5 minutes, the extraction power was 560 W, and the extraction content of flavonoids was 2.38 mg/g.

The difference from the predicted value was 0.021%, which was not much different from the predicted value of the model, which fully verified the reliability of the model. The extraction parameters obtained by response surface method were accurate and reliable, and the extraction process was reasonable and feasible.
Salinity Effects on Germination and Plant Growth of Haloxylon Ammodendron at Qaidam Basin
Authors: Xu Te , He Kangning , Wang Hui , Wang Weilu , Zhang Tan
Published: July 2020

Haloxylon ammodendron is one of the dominant characterizations of groups in Qaidam Basin. The salinity effects on H. ammodendron was determined by evaluating photosynthetic characteristic and seed germination feature responses in saline conditions in this paper. The reduction of Pn was corresponded to the decreasing Gs in the afternoon, when there was a slight increase in WUE corresponded to Pn and Tr during 15:00 to 17: 00p.m in the field trails. There was a delay in Pn and Tr to reach the postmeridian peak under 2% and 3% NaCl, while the daily mean values of WUE under 2% and 3% NaCl were higher than the 0% NaCl control. H. ammodendron seeds were found retaining 72% of germination rate under salinity degree high up to 3.51% saline solution. The values of GP, GE, GI and VI decreased evidently under 0.72% saline solution, whereas the reduction was indistinctive from 0.72% up to 2.14% saline solution without salt injury below 2.14% saline solution. Although the plant showed a slight sensibility to light salinity, H. ammodendron retained a certain potential of seed germination and seedling growth under salinity stress.
The Method of Improving the Seismic Reliability of Building Structure Based on Kriging Optimization Theory
Authors: Zhu Kun , Luo Hangyu , Pang Boshi , Zhang Wenjia
Published: July 2020

The development of social economy accelerates the process of urbanization and makes the population denser. Once the earthquake happens, it will cause serious harm to people. The building constructed by traditional methods cannot meet the seismic requirements. Based on Kriging optimization theory, this paper studies the method of improving the seismic reliability of building structure, introduces the principle of the method, and establishes the seismic model of building structure. Compared with the traditional methods, it can be found that the optimized seismic method can effectively improve the seismic capacity of the building structure, provide a better guarantee for the safety of citizens’ property and life, and has a very good use value.
Optimization Design of Double Jacked-in Spun Pile Tip
Authors: Yuan Zhiren , Yang Yanqi , Dou Lijun , Sui Yane
Published: July 2020

The design method of the pile end plate of double jacked-in spun pile tip is described. The finite element analysis is used to simulate the stress state of pile sinking and loading test. Two models to stimulate the actual stress of the pile end plate. According to the analysis results, the existing design method of pile end plate is optimized.
Finite Element Analysis of Flexural Performance of Prestressed Concrete Pipe Piles
Authors: Zhou Qingjie , Dong Zhimin , Li Jianwen , Han Fang
Published: July 2020

Prestressed concrete pipe piles, due to the long body length, are easily deformed during the construction, transportation and installation, and such deformation will affect the utilization of pipe piles and even result in broken piles. In order to ensure the construction safety of prestressed pipe piles, it’s necessary to study the flexural performance and deformation of pipe piles under loads generated from the utilization stage. This paper, by virtue of ABAQUS, analyzes the contribution of wall thickness of prestressed concrete pipe piles, the diameter of spiral bar and diameter of prestressed reinforcement to the flexural deformation of pipe piles, and the corresponding results can serve as the theoretical basis of designing and laying prestressed concrete pipe piles.
Wind-electricity-heat Correlation and Potential Uncertainty Analysis Based on Copula Function
Authors: Li Tie , Hu Jinjing , Jiang Feng , Cong Haiyang , He Xiaoyang , Ge Weichun , Li Yi
Published: July 2020

In the economic dispatch and optimal operation of power system, it is necessary and effective to consider the correlation among heat load, power load and wind power output to formulate a reasonable dispatch plan or to evaluate the reliability of the system. Therefore, based on the theory of Copula correlation analysis, a multivariate Copula analysis toolbox (MvCAT) is proposed to infer Copula parameters and estimate potential uncertainties. Firstly, the mixed evolution Markov Chain Monte Carlo (MCMC) method in Bayes framework calculates the posterior distribution of Copula parameters, evaluate their uncertainties relative to fitting, and then select the appropriate Copula function by goodness-of-fit test. Finally, a the typical daily data of a province as samples for analysis, proposed method solves the limitation that the local optimization method often falls into the local minimum, and quantitative evaluation of the correlation between the response variables and the uncertainty associated with the length of the recorded data is essential for multivariate frequency analysis.
Tea-planted soils as global hotspots for N2O emissions from croplands
Authors: Wang Yan , Yao Zhisheng , Pan Zhanlei , Wang Rui , Yan Guangxuan , Liu Chunyan , Su Yuanyuan , Zheng Xunhua , Butterbach-Bahl Klaus
Published: July 2020

Tea-planted soils generally receiving high nitrogen (N) fertilizer doses are more vulnerable to acidification, and turn into significant sources of the potent greenhouse gas nitrous oxide (N2O). However, little is known about the magnitude of soil N2O emissions from global tea plantations. Based on a global meta-analysis of field experimental data collected from major tea growing countries, we quantify annual N2O emissions, calculate direct emission factors (EFd) and identify key environmental controls of emissions from tea plantations. However, most data are from China and Japan, which is to be expected given that tea plantations in these countries represent >60% of the global area and the vital environmental research community in both countries. Results suggest that annual N2O emissions from soils of global tea plantations are on average 17.1 kg N ha−1 (or 8008 kg CO2-eq ha−1), being substantially greater than those reported for cereal croplands (662–3757 kg CO2-eq ha−1). The global mean EFd for N applications to tea plantations equals 2.31% (with a 95% confidence interval of 1.91%–2.71%), being two times higher than the Intergovernmental Panel on Climate Change default value of 1%. Across tea plantations worldwide, total N2O emissions are estimated to be 57–84 Gg N yr−1, or 1.5%–12.7% of total direct cropland N2O emissions. Given that tea plantations account for only 0.3% of total cropland area, our finding highlights that tea-planted soils are global hotspots for N2O emissions and that these systems might be prime targets for climate change mitigation in the agricultural sector. Considering that tea is a high price commodity for which consumers may be willing to apply pressure for more climate-smart production, possible mitigation efforts include use of controlled-release fertilizers or nitrification inhibitors, and application of biochar and/or lime for increasing soil pH; i.e. measures that increase N use efficiency while reducing the climate footprint of tea production.
Prediction of coastal flooding risk under climate change impacts in South Korea using machine learning algorithms
Authors: Park Sang-Jin , Lee Dong-Kun
Published: July 2020

Coastal areas have been affected by hazards such as floods and storms due to the impact of climate change. As coastal systems continue to become more socially and environmentally complex, the damage these hazards cause is expected to increase and intensify. To reduce such negative impacts, vulnerable coastal areas and their associated risks must be identified and assessed. In this study, we assessed the flooding risk to coastal areas of South Korea using multiple machine learning algorithms. We predicted coastal areas with high flooding risks, as this aspect has not been adequately addressed in previous studies. We forecasted hazards under different representative concentration pathway climate change scenarios and regional climate models while considering ratios of sea level rise. Based on the results, a risk probability map was developed using a probability ranging from 0 to 1, where higher values of probability indicate areas at higher risk of compound events such as high tides and heavy rainfall. The accuracy of the average receiver operating characteristic curves was 0.946 using a k-Nearest Neighbor algorithm. The predicted risk probability in 10 year increments from the 2030s to the 2080s showed that the risk probability for southern coastal areas is higher than those of the eastern and western coastal areas. From this study, we determined that a probabilistic approach to analyzing the future risk of coastal flooding would be effective to support decision-making for integrated coastal zone management.
Does the Type and Timing of Educational Attainment Influence Physical Health? A Novel Application of Sequence Analysis
Authors: Vable Anusha M , Duarte Catherine dP , Cohen Alison K , Glymour M Maria , Ream Robert K , Yen Irene H
Published: July 2020

Nontraditional education trajectories are common, but their influence on physical health is understudied. We constructed year-by-year education trajectories for 7,501 National Longitudinal Survey of Youth 1979 participants aged 14 to 48 years (262,535 person-years of education data from 1979 to 2014). We characterized trajectory similarity using sequence analysis and used hierarchical clustering to group similar educational trajectories. Using linear regression, we predicted physical health summary scores of the participants at age 50 years from the 12-item Short-Form Survey, adjusting for available confounders, and evaluated effect modification by sex, race/ethnicity, and childhood socioeconomic status. We identified 24 unique educational sequence clusters on the basis of highest level of schooling and attendance timing. General education development credentials predicted poorer health than did high school diplomas (β = −3.07, 95% confidence interval: −4.07, −2.07), and bachelor’s degrees attained at earlier ages predicted better health than the same degree attained at later ages (β = 1.66, 95% confidence interval: 0.05, 3.28). Structurally marginalized groups benefited more from some educational trajectories than did advantaged groups (e.g., Black vs. White Americans with some college; those of low vs. high childhood socioeconomic status who received an associate’s or bachelor’s degree). Both type and timing of educational credentials may influence physical health. Literature to date has likely underestimated the impact of educational trajectories on health.