bluuebunny/crossref_metadata_2025 huggingface dataset:
Research on Control Strategy of Hybrid Electric Vehicle
Authors: Bai Yuefei
Published: March 2021

Focusing on optimizing the energy management strategy of the hybrid power system and improving the fuel economy, this paper mainly studies the determination of the optimal control target driving comfort, and obtains the optimal control law according to the optimal control theory, and designs the controller. Finally, in order to make the system control indicators reach the research goals, an observer is established for tracking observation.
Smart Grid Communication System based on OTN Technology
Authors: Zhang Zhanghuang , Tang Yuanchun , Zhou Zhaozheng , Xia Bingsen
Published: March 2021

With the rapid development of society, the social demand for electricity is increasing day by day, which puts forward higher requirements for the power communication network, which makes the application effect of optical transmission network technology gradually significant. In view of the characteristics and functions of optical transmission network (OTN), continuous extension and expansion are carried out to realize the gradual integration of smart grid communication system. Based on this, this paper studies the smart grid communication system based on OTN technology. Based on the analysis of the characteristics and key technologies of OTN technology, combined with the communication requirements of smart grid communication system, the specific application of OTN technology in smart grid communication system is studied, and the application of OTN technology in power communication network is taken as the experimental group Finally, the application of OTN technology in power communication network is explored. The results show that the average score of the experimental group is 3.3 higher than that of the control group in terms of service adaptability, service demand satisfaction and intelligent level of communication network. Therefore, it is very necessary to establish the backbone optical transmission network of power communication by using OTN technology, so as to provide guarantee for the safe and stable operation of smart grid.
Research on Automation Processing of Human Resource Management System in Energy Enterprises
Authors: Wang Taiyou
Published: March 2021

In order to improve the work efficiency of human resources in energy enterprises and realize the integration of internal resources, the paper designs a human resources information management system. Combining with the actuality of human resources in energy companies, the paper uses UML modelling tools to analyse system functions; uses MVC mode to design the overall system architecture to reduce the coupling between layers; the paper uses ASP. NET to deploy the development environment; at the same time the paper uses the WEB browser as the client. Finally, through the test, the information management of employees’ attendance, salary, performance and other aspects was realized, which greatly improved the efficiency of human management of energy enterprises.
Selection and Study of Functional Modules for Amphibious Unmanned Search Vehicles
Authors: Li Yi
Published: March 2021

In recent years, since the 18th National Congress first proposed the strategy of a strong country of the sea, China has begun a series of measures to improve the ability to develop marine resources, develop the marine economy, protect the marine ecological environment, and build a strong country of the sea in all aspects. Although China’s maritime search and rescue work at the policy level has made some progress, but the overall search and rescue system, the mechanical equipment process of propulsion is not yet mature, and the combination of existing search and rescue technology is not perfect, need more new thinking to. While the application of air search and rescue system has certain limitations, but the two search and rescue technology has gone through a long development, if it is applied to the marine level, it can better avoid terrain obstacles, so as to get better results.
Anomalous Noise Measurement and Analysis of the Valve Hall in ±800kV UHV Converter Station
Authors: Huang Tao , Li Gang , Wang Xingyao , She Kai , Hao Cao
Published: March 2021

In order to control the anomalous noise of the pole-I valve hall in a ±800kV UHV converter station, the background noise of the valve hall and the noise of each valve group in the valve tower are measured, respectively. The sound pressure level differences of the valve groups are compared. The anomalous noise locates in the short-circuit pipe of cooling water in the valve tower. Frequency spectrum analysis shows that the abnormal noise is related with the flow of cooling water. The two-dimensional finite element model is established to analyze the influence of chamfer angle and pipe length on the flow velocity of cooling water. The result shows that the abnormal noise is only related with the chamfer angle of the short-circuit pipe with constant flow velocity. The abnormal noise is successfully controlled by structure improvement of the short-circuit pipe and the potential risk to the valve group is avoided, which will give technique support to the operation and maintenance of the valve hall in UHV converter stations.
Review of oxide scale on high temperature heating surface in boiler
Authors: Zhang Tianyu , Zhang Xin , Bayar Nashun , Zhao Zhenning
Published: March 2021

The problem of oxide scale has always been a problem that hazards to the safe and stable operation of ultra-supercritical units, and is also the focus of equipment manufacturers, research institutes and production units. Therefore, the correct understanding and constructive result of investigation on the oxide scale’s origin, damages and formation has great guiding significance for the long-term operation of the unit.
Optimization of phase change heat exchanger based on RSM
Authors: Shang Xiuqing , Liu Fang
Published: March 2021

A tube phase change heat storage unit with fins was designed and optimized by multi-objective optimization method based on response surface method. Taking the temperature of phase change material (PCM) at a certain time as the optimization index, the effect of the relative position between the outer wall of the inner tube and the inner wall of the intermediate tube on the heat exchanger performance is mainly considered. The angle of the inner tube outer wall fin, the angle between the two fins on the outer wall of the inner tube and the angle of the fin on the inner wall of the outer tube are the three influencing factors. The optimum parameters are as follows: angle A = 7.09 °, angle B = 40.06 ° and angle C = 45 ° and the best result is obtained when the relative position of inner and outer fins is about 40 °and the optimization result is increased by 6.4%. The results show that the fitting accuracy of the regression model is as high as 97%, which shows that the results are reliable.
Research of section optimization design of steel structure main workshop of a large thermal power plant
Authors: Wang Changshan
Published: March 2021

In order to reduce the section size of column C and D column, to satisfy the needs of process engineering, this paper, by using the finite element analysis software STAAD model the stress of the main building, the main steel structure building carried on the thorough analysis, put forward two kinds of section optimization scheme, the comparative analysis shows: in the same section and the amount of steel case, the safety of the second scheme is higher than plan a, therefore, the scheme two is better than one. For scheme 1 and scheme 2, the safety of scheme 2 is 13.7% and 9.8% higher than that of scheme 1 when the same column section, the same load and the same parameters are used for column C and column D. The research results are applied to Hami Power Plant of State Grid Energy, with only columns C and D, and the actual value saves more than 500 tons of steel compared with the original value, and obtains good economic effect.
Comprehensive Analysis of Power Grid Energy Saving and Loss Reduction Based on Power Big Data Platform
Authors: Lu Haiqing , Huang Hongyang , Wu Jun , Chen Feng , Lu Chengyu , Xu Weiwei , Qian Qi , Wang Pengcheng
Published: March 2021

Whether the original power data is accurate and complete is a key factor affecting the accuracy of line loss calculations. This research is based on a big data platform to obtain the distribution network model data, topology data, and operating data required for theoretical line loss calculation and technical high loss analysis. The power system analysis algorithm is combined with the big data analysis algorithm to automatically check the distribution network. To locate the high-loss links of the power grid to assist grid planners in their energy-saving and loss-reducing planning and transformation work.
The Ignition Performance of Metal Film Bridge
Authors: Li Song , Zhang Liang , Yuan Changhong , Xia Wen
Published: March 2021

The ignition voltage of micro-satellite and MEMS fuse become more and more lower, the conventional electro-explosive devices are hardly meet the requirement. In this paper, Ni-Cr metal film bridge of different size/substrate were designed by MEMS processing technology. By using Neyer D-optimal sensitivity test method, it got the result that the threshold of ignition voltage would decrease with the decrease of designing size, and the threshold of ignition voltage with the glass substrate would be less than the silicon substrate.
Hot Stamping Process Simulation of 22MnB5 Steel Based on Identified Heat Boundary Condition
Authors: Xiao Gang , Zan Zhiwei
Published: March 2021

Finite element (FE) simulation is the powerful tool for an analysis to thermo-mechanical coupling process and helps the manufacturer in understanding the effect of the various parameters in the hot stamping process better. The simulation results are strongly dependent on the accuracy of boundary condition. In this paper, the heat boundary condition is firstly obtained based on an inverse analysis method. The characteristics of heat transfer in the interface between the sheet and the die was also analyzed. Then, the numerical simulation to the whole hot stamping process was made with simulation software by applying the identified heat boundary condition. The good agreement between the calculated and experimental temperatures demonstrates that the inverse analysis method is a feasible and effective tool for identifying the sheet-die heat boundary condition.
A coupled finite difference and material point method for simulation of gas–solid flow of thermobaric explosions
Authors: Li Gen , Lu Fangyun , Li Zhibin
Published: March 2021

A coupled finite difference and material point method (CFDMP) was presented to simulate the dynamic of the gas–solid flow of thermobaric explosions. The coupled method takes advantages of both the two methods where the finite difference method captures the wave structures of gas phase and the material point method tracks the movement of solid phase. Particle collision is easily realized in MPM framework. By using a uniform grid system, the grid nodes have both the two phases’ information and their interactions are directly calculated. The simulation of thermobaric explosions in different containers is carried out and the results validate the accuracy of CFDMP program. The particle collision reduce the compression degree of the solid phase in the initial expansion stage but slightly influence the pressure history at the gauge. The process of particle movement in the container is demonstrate and the wall-reflected wave enhances the burning rate of particles.
Research and analysis of fluorescent magnetic particle inspection of steam turbine rotor blade
Authors: an Jie
Published: March 2021

The operating conditions of turbine rotor blades are complex and changeable, and the probability of defects is high, which puts forward higher requirements for the professionalism, safety, stability and convenience of magnetic particle inspection personnel. How to find the deficiencies in the magnetic particle inspection of blades and improve it to better adapt to the field inspection has become the focus of attention. This paper mainly describes the process of fluorescent magnetic particle inspection, compares the similarities and differences of magnetization specifications in three domestic standards, analyzes the problems found in the process of fluorescent magnetic particle inspection and makes corresponding improvement, and adopts reasonable optimization scheme to improve the reliability of fluorescent magnetic particle inspection. After demonstration test and field application, the improved fluorescent magnetic particle inspection can give full play to its advantages, achieve the purpose of rapid, accurate inspection and continuous improvement; on this basis, different inspection platforms can be established to inspect different parts, improve the universality and inspection efficiency of magnetic particle inspection, which is conducive to the promotion and application of magnetic particle inspection in the field of nuclear power.
Vibration analysis and optimization of controller bracket
Authors: Hu Shunan , Chen Yanchang , Zhu Junjie , Zhao Yang , Hu Yanbin , Wang Chong
Published: March 2021

Through harmonic vibration test and harmonic simulation analysis, the first natural frequency of controller bracket did not meet the experimental test requirements that proposed by the manufacturer (greater than 2000Hz). Through modal analysis of controller bracket, we could optimize controller bracket from design structure, processing technology, handling and other aspects. Cast aluminum material ZALSi12 was adopted. After modal analysis, the frequency of optimized structure was 2374Hz, which meets the experimental requirements proposed by the manufacturer.
Study on the constitutive equation of hot forming of boron steel sheet
Authors: Li Xiaoda , Zhan Xianghui
Published: March 2021

The high temperature constitutive equation of boron steel sheet can describe the relationship of the thermodynamic parameters on the hot forming process of boron steel sheet. It can reflect the relationship between flow stress and strain, the temperature and strain rate, and is indispensable in the forming simulation of hot stamping forming process. In this paper, around the ultra-high-strength boron steel sheet 22MnB5, conduct thermodynamic tensile test on it. And the high-temperature constitutive equation of the high-strength steel sheet under the high-temperature austenite state is established according to the deformation theory. Finally, it is confirmed that the improved Norton-Hoff constitutive equation fitted with the experimental results is in good agreement with the flow stress relationship of boron steel 22MnB5.
An Improved Load Spectrum Extrapolation Method of Railway Vehicle Bogie Frame
Authors: Ma Shuang , Sun Shouguang , Wang Binjie , Wang Ning
Published: March 2021

This article is aimed to seek for a precise extrapolation method on railway vehicle bogie frame load spectrum based on real engineering problem in China Standard EMU and Beijing Subway vehicle. The most common used methods, exceeding probability and standard load spectrum with cumulative frequency, are discussed. An improved method that excludes trivial load amplitude while calculating cumulative frequency is proposed. The three methods are deployed with real measured data and then compared with the ground truth. The comparison result shows that the improved method introduced in this article has the minimum error of the estimated load maxima and least deviation from ground truth load spectrum.
An Integer Programming Model for Flow Shop Scheduling Under TOU and Tiered Electricity Price
Authors: Peng Lining , Yang Mingshun , Xiao Renhao
Published: March 2021

Reasonable scheduling can achieve energy saving in the production process. Considering the TOU and tiered electricity price policy, an integer linear programming model for flow shop with the goal of minimizing the power cost is constructed, and a particle swarm optimization algorithm (PSO) with a three-layer coding method based on the workpiece, start time and machining state and the iterative process is designed. Finally, the correctness of the mathematical model and the effectiveness of the algorithm are verified by an example.
Research on Structure Design of New Energy Photovoltaic Inverter
Authors: Jia Jianping
Published: March 2021

With the increase of energy demand, primary energy is drying up. In order to achieve sustainable development, renewable energy and new energy research is imperative.The research and development of solar photovoltaic inverter can supplement and improve the existing energy structure, which has long-term practical significance.In this paper, the structure design of solar photovoltaic inverter power supply is studied. The power supply adopts lead-acid battery energy storage and full bridge inverter structure. At the same time, the paper studies the design of power supply protection circuit to realize battery reverse connection protection and MOSFET overvoltage protection.
Research on Metro Power Supply System Based on New Green and Environmental Protection
Authors: Wang Yaya , Liu Junhui
Published: March 2021

Installing a ground-based super capacitor energy storage system in the subway will effectively recover the regenerative braking energy of the train, reduce the energy consumption of the system, and achieve the goal of green and environmental protection. Various substations, traction/braking trains and energy storage systems interact in real time through the traction network to form a complex multi-energy coupling system. Therefore, in order to improve the overall energy efficiency of the traction power supply system and reduce investment costs, this article proposes Comprehensive optimization method for power supply system parameters and energy storage system capacity configuration. Through research, it is found that compared to the optimization of a single energy storage system, comprehensive optimization effectively improves the energy-saving rate of the energy storage system when the investment cost is similar.
Investigation and Protection of Ancient and Famous Trees Resources of Daxiong Mountain
Authors: Xiao Yanwu , Wang Dinglong , Wu Yi
Published: March 2021

In the paper, the authors presents current situation of ancient and famous trees resources in Daxiong Mountain; the characteristics of ancient and famous trees resources is analyzed: (1) There were a large number of trees, and most of them appear in communities. (2) There are many old and tall trees with beautiful tree shapes and different postures. (3) There are many rare and precious old trees. Third, investigated the Problems existing in protection and management of ancient and famous trees in Daxiong Mountain and the reasons. Final, protection countermeasures of ancient and famous trees in Daxiong Mountain is put forward.
Future resettlement of environmentally displaced persons
Authors: Wang Bingran
Published: March 2021

With the development of human economy and society, there has been climate warming, sea level rise, resulting in many environmental displaced people. Their placement will become a serious problem in the future. In response to the increasing number of EDPs caused by sea level rise, first, we established a dangerous population prediction model, estimated the number of dangerous people over time by predicting sea level height, and established a cultural loss model to estimate EDP migration by quantifying cultural indicators. The problem of cultural loss in the process. Then, in order to effectively solve the problem and protect the human rights and culture of EDP, we have established a tripartite game model and concluded that the United Nations should have the right to speak on this issue and make a unified deployment for each country.
Study on Nano Graphene Oxide Used to Enhance the Stability of Emulsion
Authors: Wang Daming , Chen Hong
Published: March 2021

Graphene oxide is prepared by carbonization, and then the graphene oxide is grafted with dodecylamine by one step to adjust the wettability. XRD and optical pattern tests of graphene oxide showed that the process of grafting dodecylamine modification can expand the layer spacing of graphene oxide by 0.044nm and enhance the intensity of fluorescence. The grafting dodecylamine modification can significantly change the solubility and wettability of graphene oxide in water, and the contact angle of the modified graphene oxide with water is 165°. Modified graphene oxide can effectively enhance the stability of emulsions stabilized by SDBS surfactants.
Discovery of Novel Mammalian target of rapamycin (mTOR) Inhibitors by Support Vector Machine
Authors: Wang Panpan , Xu Xiaobo , Li Yinghong , Li Bo , Pei Qinglan , Yu Pei , Jing Chenxi , Lu Meng
Published: March 2021

Mammalian target of rapamycin (mTOR) is a protein serine/threonine kinase playing the central downstream role in multiple mitogenic signalling pathways. As a c entral regulator of cell growth, proliferation, differentiation and survival, mTOR has b een reported to modulate proliferation and angiogenesis in neoplastic processes. Curre ntly, sirolimus and its analogues the only five mTOR inhibitors approved for clinical u se, which shows a great capacity in anticancer therapy. However, endocrine resistance in cancer therapy has been observed in sirolimus analogues, and the unavailability of n ew mTOR inhibitor besides similar structure of sirolimus analogues makes the resistan ce even worse. It is urgent to discovery new mTOR inhibitors as candidates for develo pment of effective anticancer drugs. In this study, support vector machine (SVM) as a virtual screening strategy was proposed. SVM models of mTOR inhibitors were constr ucted by training data published before 2012, and the ones published after 2012 as test set were used to verify according to cross validation. The selected model performed thi n false hit rates of 0.12% and 0.46% by screening PubChem and MDDR chemical libr aries respectively. As results, 9 novel novel scaffolds for mTOR were identified, and 6 of them have been reported their anticancer-related therapeutic capacity. In summary, SVM performed its ability to identify novel mTOR inhibitors, which can supply some candidates for mTOR anticancer drugs, and supply effective method for anticancer dru g discovery in future.
The Application of Cloud Class in the Teaching of Biochemistry
Authors: Sun Naxin , Wang Yuanxiu , Liu Yuehui
Published: March 2021

Interactive cloud class platform assisted instruction is an important supplement of classroom teaching, and it is becoming one of the important forms of new teaching methods. Biochemistry is the most important specialized basic course for biotechnology students, and it is also considered one of the hardest subjects among the curriculum. The current work explores the application of the cloud class in the teaching of the theoretical biochemistry courses. Practical research shows that the application of the cloud class teaching platform can effectively motivate students’ learning potential to the greatest extent. With this tool, teachers and students have come to get keenly a sense of the kind of creativity and advancement of information-based teaching, and the blended learning integrated face-to-face instruction and online teaching provides a new way and method in higher education teaching reforming.
Research and Practice on Training Mode Reform of Applied Talents in Environmental Engineering Technology under Industry-Teaching Integration Training Base
Authors: Zhou Xiaonan , Li Chunying , Wang Chuanjie , Luo Dan
Published: March 2021

It is an effective way to promote the in-depth development of school-enterprise cooperation to build a high-level professional training base integrating industry and education with radiation-leading effect [1]. It is an important measure to reform the training mode of talents and improve the training ability of talents with technical skills. Through the research on the construction and teaching reform of the industry-teaching integration training base for environmental engineering technology major in Chongqing vocational college of resources and environmental protection, adopt the “four-in-one” teaching reform mode of “Internet + teaching + project +X certificate” [2], carry out reform and practice of application-oriented talent training mode based on industry-teaching integration training base. Implement the curriculum teaching design that emphasizes vocational competence [3], analyze the results and experience, put forward the problems existing in the process of educational reform and the effective operation thinking of sustainable development, to study and explore a new path for the trainning of environmental engineering talents under the background of industry-education integration training base [4], continuously enhance the ability of environmental engineering technology specialty to accurately serve regional development needs.
Effects of Anaerobic Digestion on Antibiotic Resistance Genes in Sludge
Authors: Zhang Xin , Wang Na
Published: March 2021

Sludge treatment and reuse in municipal sewage treatment plants is beneficial to improve economic effect and reduce environmental pollution. Sludge is an important source of contamination of antibiotic resistance genes. Anaerobic fermentation is an important way to treat activated sludge. Effective treatment of municipal sludge can avoid the release of pathogenic microorganisms and resistance genes (ARGs) into the environment and cause secondary pollution. The research results will be of certain guiding significance to the resource utilization of sludge.
Summary and Prospect of Research on Agricultural Non-point Source Pollution in my country’s Watershed
Authors: Xiong Guobao , Ma Yiming , Luo Yuanda
Published: March 2021

Agricultural non-point source pollution poses a serious threat to the quality of water environment in river basins, which has attracted more and more attention from the government, society and academic circles. With the increasingly prominent problem of agricultural non-point source pollution in river basins in China in recent years, domestic scholars have carried out extensive research on it. However, most of them are case studies on a single watershed, and there is a lack of overall grasp on agricultural non-point source pollution in the watershed at present in China. In view of this, this paper sorts out and analyzes the existing research results from the related concepts, characteristics, formation mechanism, measurement methods and other aspects of agricultural non-point source pollution, in order to try to sum up the general laws from the current individual research, and on this basis, puts forward the direction that future research can explore, providing ideas and reference for researchers and practitioners of agricultural non-point source pollution in river basins of China.
Effect of Gas Liquid Two Phase Flow on VOCs Degradation by Atmospheric Low Temperature Plasma
Authors: Liu ChangLin , Ren Xi , Zeng MingHui
Published: March 2021

This paper proposes a combination of barrier dielectric discharge (DBD) and saturated sodium bicarbonate solution boiling tube to generate a gas-liquid two-phase flow containing plasma, and through characterization methods to study the solution in the boiling tube under the action of DBD discharge the law of boiling evolution. Then, by designing the cavity, the gas-liquid two-phase flow mixture produced by the boiling tube was sprayed into the needle electrode discharge area of the reaction chamber, and the influence of the gas-liquid two-phase flow on the plasma treatment of VOCs was explored. Spectral diagnosis proved that after the introduction of gas-liquid two-phase flow, the plasma concentration in the discharge area increased significantly, and the removal rate of VOCs was effectively increased from 32% to 55% in the decontamination experiment. It is proved that the introduction of gas-liquid two-phase flow can improve the effect of plasma degradation of VOCs.
Functionalized Selenium-Doped Carbon Quantum Dots for Targeting Detection of Reactive Oxygen Species in Live Cells
Authors: Zhou Danling , Huang Hong , Wang Yan , Yu Junrong , Hu Zuming
Published: March 2021

Selenium doped carbon quantum dots (Se-CQDs) are synthesized by a facile hydrothermal process. The Se-CQDs show narrow size distribution in the range of 3-4 nm, good optical properties, and high sensitivity in detection of various reactive oxygen species (ROS) as revealed by several characterizations. The Se-CQDs are then modified by three kinds of organelle targeting molecules with the aim of targeting detection of ROS in specific organelles. The confocal fluorescence studies on modified Se-CQDs and commercial organelle marker demonstrate the successful targeting detection of ROS in different organelles by our specific modified Se-CQDs.
Experimental study on the strain self-sensing properties of nano carbon black modified resin based CFRP bars
Authors: Liu Dan , Liu Ronggui , Zhang Shaofeng
Published: March 2021

In order to explore the influence of nano carbon black content on the piezoresistive effect of resin based CFRP bars, 2%, 4%, 6%, 8%, 10% nano carbon black modified resin were used as matrix, and the roller extrusion process was adopted to prepare CFRP bars. The initial resistivity, the response of resistance change and the relationship between sensitivity change and strain under static tensile test were compared and analyzed. The results show that the strain sensitivity of CFRP bars can be significantly improved, and the discreteness of test data can be reduced by adding uniformly dispersed carbon black into the resin matrix. The optimum content of carbon black is 6%, the sensitivity is 25.4 in the strain range of 0 ∼ 1.2%, and the linear relationship between resistance change rate and strain is satisfied, and the determinable coefficient is 0.985. When the content of carbon black is more than 6%, the effect of modification on the sensing properties of CFRP bars is not obvious.
Analysis of microstructure and wear resistance of NM400 thick plate
Authors: Cong Liang , Pei Yingchao , Xia Dianxiu , Wang Dongyue , Han Zhengpeng , Han Qing , Liu Zhiheng , Guo Yu
Published: March 2021

The hardness distribution and microstructure morphology of NM400 low alloy wear resistant steel plate with thickness of 50mm and 60mm were tested and analyzed, and the sliding wear performance of typical measuring points was also analyzed. The results show that the depth of the NM400 (50mm) hardening layer is about 35mm, accounting for about 70% of the plate thickness. The depth of the NM400 (60mm) hardening layer is about 22mm, accounting for about 37% of the plate thickness. With the position of the measuring point gradually away from the surface of the steel plate, the martensite content in the microstructure of NM400 (50mm) and NM400 (60mm) gradually decreased, and the contents of pearlite, bainite and other microstructure gradually increased. The hardness of NM400 (50mm) gradually decreased from 410HV to 335HV, and the hardness of NM400 (60mm) gradually decreased from 410HV to 305HV. The micro-wear morphologies of NM400 (50mm) and NM400 (60mm) at each measuring point are mainly furrow and contact fatigue spalling, and the wear types are mainly abrasive wear and contact fatigue wear. The furrow depth and the number of furrows on the worn surface of the sample at the corresponding measuring point position gradually increased as the measuring point position moved away from the steel plate surface, and the spalling area and the depth of the spalling pit gradually increased. The wear type gradually changed from particle wear to contact fatigue wear.
Study on the influence of the variation of PM2.5 index of gaseous pollutants on human health in Gansu Plateau in recent years
Authors: Gao Jike
Published: March 2021

In recent years, the party and the country to environmental governance as a new era of socialism with Chinese characteristics of the basic guarantee of the development of various undertakings, clean air is a necessary condition for human health survival, quality air quality is a beautiful livable important indicator. The diurnal, monthly and annual changes of PM2.5 in Gansu Plateau in recent years were tracked and analyzed by means of instrument measurement and mathematical statistics. Based on the analysis of the data model, the promotion strategies are put forward from the perspective of human health.
Comparison of Performance and Microstructure of Two Kinds of Cold Spray Anticorrosion Composite Coatings on High-strength Steel
Authors: Shi Zhongchuan
Published: March 2021

Objective to study the performance of Zn/Ni composite coatings and Al/Zn composite coatings, which were deposited by Cold Gas Dynamic Spray. Methods: Those coatings was sprayed by Zn and Ni mixture powder and Al and Zn mixture powder on 300M high-strength steel surface, the SEM images and micro hardness tester analyzed the two kinds coatings’ morphology and microstructure. The corrosion resistance of Zn/Ni coatings can be compare with Al/Zn coatings, which was investigated by neutral salt-spray test and coating furcated test. Results The results indicate that Zn/Ni coatings porosity is 0.8%, it is same as Al/Zn coatings. The micro hardness of Zn/Ni coatings is 70.8HV, which is higher than Al/Zn coatings 61.2HV. However, the salt spray result of Al/Zn coatings can reach 1000h and it can reach 770h even the coatings fails; which is better than Zn/Ni coatings, their salt spray resistance can reach 770h and it can reach 350h when the coatings fails. Conclusion those coatings could both be efficient corrosion resistance coatings on 300M high strength steel surfaces.
Integrated Device for Collection of Garden Waste and Production of Auricularia Auricula Medium
Authors: Shao Xinzhe , Wang Jiawen , Cao Xuewei , Yan Zhen , Zhao Bingjie , Lv Yifan , Li Yiwei
Published: March 2021

With the acceleration of greening process in China, the output of garden greening waste is also increasing, but the treatment method of greening waste is single and the utilization degree of resources is low. Therefore, this work puts forward a method that integrates waste collection and Auricularia auricula culture medium production. Taking garden waste as raw material, the original material of Auricularia auricula culture medium is obtained through the process of collection, primary crushing and secondary crushing, and mixing ratio process. After simple packaging and subsequent sterilization and disinfection process, the regenerated Auricularia auricula culture medium is made.
A Study on Current Situation of Cycling along Sichuan-Tibet Line
Authors: Geng Shuai , Zhou Xin
Published: March 2021

This paper takes Sichuan-Tibet Line cyclists as the research object, and adopts the methods of literature review, field investigation and questionnaire investigation to study the current situation of Sichuan-Tibet Line cyclists. Research results: Most of them are men, while women are on the rise. The age structure is jujube pit-shaped, with young people aged 18-25 accounting for the majority. It is widely sourced from east and southwest China, and other regions also account for a certain proportion. There are many students, and college and undergraduate education is the main body. The income is in the middle and upper levels, and the income is stable. They decided to ride with a variety of motives, traveling with friends, and most of them chose to ride from July to August. The Sichuan-Tibet Line is characterized by large ups and downs, poor road conditions, complicated and changeable weather and frequent geological disasters. It has a long riding distance, few people along the way, few supply points, few cycling events, and the government does not attach great importance to it. The purpose of this paper is to improve the influence of Sichuan-Tibet Line, bring sports tourism benefits along the Sichuan-Tibet Line, and realize the win-win policy of “sports + tourism”
Numerical Simulation for the Flow Characteristics of Shale Oil in Fractured Shale Reservoirs
Authors: Peng Fei , Huang Zhaoqin
Published: March 2021

Compared to conventional reservoirs, shale reservoirs are characterize by the extraordinary low porosity and permeability, which contribute to the large-scale application of the technology of hydraulic fracturing in the development. The flow characteristics of shale oil is quite complicated in the hydraulic and natural fractures and the flow characteristics of shale oil in fractures is vital significant to oilfield development. In this paper, a model is developed to simulate the flow characteristics in fractured shale reservoirs, which fully coupling the geomechanics and fluid flow. Specifically, an embedded discrete fracture model is adopted to characterize the hydraulic fractures and the flow between natural and hydraulic fractures. Correspondingly, the Multiple Interacting Continua model is adopted to characterize the flow between matrix and natural fractures. The influence on production caused by the stress sensitivity of two kinds of fractures is considered. Then, the sequential iterative solution method is adopted to solve the model which coupled the geomechanics and fluid flow, and the finite volume method and the finite element method are applied to solve the fluid-governing equations and geomechanics-governing equations, respectively.
Modeling and Analysis of Ferrofluid Transport in Porous Media
Authors: Li Yuan , Yao Jun , Huang Tao
Published: March 2021

As a new kind of material, ferrofluid has received a huge amount of concern and researchers have tried to apply ferrofluid in the field of petroleum engineering. In this paper, the effect of polymer in ferrofluid has been taken into consideration in ferrofluid flooding, a comprehensive mathematical model has been developed. The mathematical model considers the magnetic force, the physical process of the mobilization of polymer through porous media. The results show that using ferrofluid as displacing fluid can greatly improve oil recovery.
Geophysical characteristics and interpretation methods of the buried hill surface in the west slope of Shulu depression
Authors: Ren Chongyu , Lv Hongjiu , Huang Wenfeng , Liu Bo , Zhao Zhengquan
Published: March 2021

In the cause of the buried hill and conglomerate layer are carbonate rock type, there is no obvious difference between the wave impedance and the overlying strata. Therefor there is no strong reflection on the surface of the buried hill, and no obvious change in the logging curve. In order to solve this problem, taking west slope of Shulu depression as an example, the logging characteristics of the conglomerate surface and seismic reflection characteristics of the buried hill surface are summarized. The sedimentological characteristics of the buried hill surface are analyzed. The differences between the identification of the buried hill surface and the identification of the conglomerate surface are found. The interpretation method of the buried hill surface is defined. It provides a theoretical basis for better interpretation of buried hill reservoir.
Research on Population Spatialization Method Based on AWA-ESPCN
Authors: You Peng , Liu Minghao , Du Jiang , Jing Lei
Published: March 2021

The spatialization of population is the process of rasterizing demographic data, which is of great significance for government decision-making and promoting the coordinated and sustainable development of social economy, resources and environment. In the continuous research of multiple linear regression, spatial interpolation, the use of multi-source heterogeneous data, random forest and other methods, a batch of highly representative global and national-scale population spatial databases have been born. Therefore, through the super-resolution of deep learning the method is more valuable for population low-scale sampling research and end-to-end mapping to achieve high-precision downscaling and enhance the robustness and generalization of the training model. This paper is based on the population statistics of the counties in Chongqing municipality in 2010, through the area-weighted rasterization coupled sub-pixel convolutional neural network (ESPCN) to learn the global and local features of the population to achieve 500m resolution population spatialization, and compare it with the other 2 compare plan. The results show that the training model using this method has the lowest mean square error, the smallest residual interval, and the best picture effect.
Effect of Adding Different Proportions of Arsenic on the Carbon Content of Sandy Soil
Authors: Cao Tingting , Guo Zhen , Xu Yan
Published: March 2021

In order to explore the effect of different proportions of arsenic sandstone on the carbon content of sandy soil, the total organic carbon index of arsenic sandstone and sand composite soil was selected for analysis. The carbon content is the highest, especially in the 0-20cm soil layer. After 9 years of cultivation, the 0-10cm total organic carbon content of each proportion of the composite soil layer is significantly higher than that of the sandy land. The average total organic carbon of 9 years of cultivation Compared with three years of cultivation, it has increased by 68.50%, which is a significant increase. In the early stage of compounding, due to engineering disturbances and disturbance of the natural cultivation process of the soil, the total organic carbon content in the compounded soil has a downward trend. With the later cultivation of the compounded soil, the total organic carbon increased significantly, and the addition of arsenic was greatly increased. This accelerated the natural succession process of sandy soil.
Research Progress of Soil Microorganism Application Based on High-Throughput Sequencing Technology
Authors: Zhang Yujun , Wang Puchang , Long Zhongfu , Ding Leilei , Zhang Wen , Tang Huajiang , Liu Jiajia
Published: March 2021

Soil microorganisms play the role of decomposers and consumers in the ecosystem, and microbial diversity can reflect soil characteristics to a certain extent. The research on soil microbial diversity mainly includes the following four aspects: species diversity, structural diversity, functional diversity and genetic diversity. In the past, due to the limitation of technology and other reasons, the traditional methods to study soil microorganisms were too simple to fully reflect the structure of soil microbial community. At present, the second generation of sequencing technology, high-throughput sequencing, is favored by researchers because of its high integrity and accuracy, and has become one of the main methods to study soil microorganisms.
Research on Information Platform of Plate Cutting and Groove Workshop
Authors: Zhang Teng
Published: March 2021

With the state’s policy support and encouragement for the transformation and upgrading of high-end equipment manufacturing industry, as well as the maturity of technologies such as big data and artificial intelligence, intelligent production is gradually developing towards systematization and platform. At present, none of the large-scale plate blanking workshops have realized digital production. The blanking workshop is the source of manufacturing production, and the digitalization of the blanking workshop is very important for the production management of enterprises. The digital transformation of blanking workshop is gradually extended to other workshops, which greatly improves the intelligent level of manufacturing industry. This paper briefly describes the method of realizing the digitization and informatization of the blanking workshop, and further improves the intelligent degree of production through the construction of the workshop informatization platform, so as to improve the work efficiency of the workshop.
Research on the Model of Regional Circular Economics Based on Computer Modelling
Authors: Gu Yajun , Chen Can
Published: March 2021

This thesis takes the geographical area resource coverage as an example and uses computer theory to model circular economics. The thesis establishes a multi-objective regional economic resource optimization allocation model, uses MATLAB language to write programs, and obtains the results of resource optimization allocation based on the results of resource supply and demand forecast analysis. Finally, the paper analyses the results of resource optimization allocation, and realizes the coordinated development of society, economy and environment based on sustainable development.
Study on the Effect of Mineral Powder and Fly Ash on Cement Hydration Heat
Authors: Li Geli , Fang Yunhui , Shao Youzhe , Wu Chuandeng , Guo Yuanqiang , Ma Xiuxing
Published: March 2021

In this paper, the hydration heat and hydration temperature-time curves of different proportions of cement, fly ash, mineral power, and fly ash and mineral power at different ages were studied. The results showed that compared with cement alone, fly ash and the heat of hydration of cement at different ages had been reduced, and the maximum temperature had been reduced to varying degrees. The maximum temperature time had been advanced compared to cement, and the reduction of the hydration heat of cement by pulverized coal was higher than that of pulverized coal. Ash reduced the heat of cement hydration. When cement was replaced by fly ash and mineral power in different proportions, the heat of hydration was also reduced, but the reduction was disproportionate. As the blending ratio increased, the degree of hydration of the cement decreased and the maximum temperature decreased. The reduction of hydration heat of fly ash was better than the end of the initial period, but the reduction of heat of hydration by mineral powder was not very obvious, but it can slow down the heat release rate of hydration heat significantly.
A Method of Classifying Oilfield Benefit and Application
Authors: Zhou Qing
Published: March 2021

Benefit classification analysis is an important content for not only studying the benefit categories of different blocks in Oilfield, but also controlling and adjusting the negative benefit blocks. Due to the lack of comprehensive consideration of development stage and geological conditions, the classification of oil field development units has some limitations. Through comprehensive analysis of the influencing factors of oilfield development benefit, this paper classifies unit development by using system clustering method. DEA (Data Envelopment Analysis) model is used to analyze the relative validity of different development units. In the same geological and development condition units, the method of benefit classification based on validity analysis is used to realize the comprehensive classification of development and economy. Benefit classification analysis using the benefit evaluation data of a low permeability development unit in eastern oilfield shows that it can play a guiding role in benefit classification, negative effect management and operation strategy of the development unit.
Study on characteristics of the sediment release in Chaohu Lake
Authors: Wu Junwei , Zhong Xianjin , Yang Lingling
Published: March 2021

Through the indoor static simulation test on the nitrogen and phosphorus released characteristics of the sediment in Chaohu Lake, the released characteristics of TN and TP in the sediment of Chaohu Lake under different conditions such as different temperatures, different pH values and the disturbance of overlying water and whether the aquatic plants were planted on the sediment were analyzed or not. The results show that, it is beneficial to the release of sediment contaminants with increasing temperature. When pH is neutral, which is not adverse to the release of sediment pollutant, while disturbing overlying water can accelerate the release of pollutant in the sediment, and the effect of eliminating the water body TN is obvious, but the effect of eliminating the water body TP is not obvious.When we plate the aquatic plants, it is good for the release of pollutant in sediment and the improvement of water quality,This can provide a theoretical basis for the control of sediment pollution in Chaohu Lake through the above test.