bluuebunny/crossref_metadata_2025 huggingface dataset:
Numerical study on the influence of spatial shape of fault fracture zone on the scope of tunnel collapse
Authors: Yang Zhongmin , Zhang Yufang
Published: July 2020

Fault fracture zone is an important factor leading to tunnel collapse. Studying the influence of the fault’s spatial shape on the scope of tunnel collapse is important. In this paper, the discrete element numerical simulation method is used to study the possible collapse range and displacement caused by fault dip angle and thickness. The results show that the change of fault dip angle has a greater impact on the collapse range and displacement value, while fault thickness has a smaller effect on it. However, when the thickness of the fault is large, the collapsed body of the vault cannot be self-stabilized, and the bottom collapsed body needs to provide support for it to keep stable. The research can provide guidance for the prediction of the scope of the collapse and the rescue of the accident caused by the collapse.
Synergic Evidence-based Design Principles and the Demonstration of their Integrated Implementation in Green Construction Zone: A case study of Jiangsu Green Building Expo Park
Authors: Xu Bin , Huang Ji
Published: July 2020

This paper reviews the synergic evidence-based deisgn principles and interprets their related design methods and development approaches. It explores the importance of using such concepts to inform the integrated development of green construction zones, which can facilitate the large-scale development of green buildings in a given region. Based on a case study of the development process of Jiangsu Green Building Expo Park, which is know as the first theme park in China including a range of experimental projects to show the integrated design and contruction methods for green buildings, it analyses the targets, concepts and key technologies that have been used to support the integrated development of green buildings by now. Finally, this paper summarises the innovative thinking on integrated development of green buildings and the related implementation approaches, developmental strategies and potential business values.
Two-dimensional BaFCl monolayer: tunable bandgap and pronounced deep ultraviolet absorption
Authors: Zhu Zhenxue
Published: July 2020

Two dimensional (2D) wide bandgap materials have attracted a lot of attention due to their unique structural and optoelectronic properties. Based on the first principle calculations, we report a 2D wide bandgap BaFCl monolayer with an indirect bandgap of 5.58 eV. Remarkably, the bandgap can be flexibly tuned by applying external strain or electric field (E-field). Especially, monolayer BaFCl undergoes the transition from indirect bandgap semiconductor to direct bandgap semiconductor under small compressive strain, and a semiconductor-to-metal transition can be achieved by applying the electric field of 0.8 V/Å. In addition, monolayer BaFCl exhibits strong optical absorption in deep ultraviolet (UV) spectrum. These results render monolayer BaFCl as an attractive 2D material for application in flexible nanoelectronic and optoelectronic devices.
The process of moisture and temperature change of soil profile in Pisha sandstone area
Authors: Zhang Pan , Sun Weiying , Xiao Peiqing , Yang Chunxia
Published: July 2020

The Pisha sandstone area in Ordos Plateau is a cross zone of water, wind and freeze-thaw erosion. Freeze-thaw erosion is one of the important erosion modes in this area, and soil moisture and temperature are the two key factors affecting it. In order to reveal the change process of soil moisture and temperature with time in the Pisha sandstone area, we took the small watershed of Erlaohugou in Huangfuchuan as the study area. Two sets of EM50 full-automatic collection systems were set up on a typical slope in the area, and the change process of moisture and temperature of the slope from March to September was continuously observed. The results showed that the changes of soil moisture and temperature in this area were greatly affected by seasons and climate. Soil moisture exhibited significant temporal and spatial differentiation, while soil temperature had significant temporal differentiation but not obvious spatial differentiation.
Study on the Critical Dynamics of Compound Erosion in the Pisha Sandstone Area
Authors: Yang Chunxia , Zhen Bin , Xiao Peiqing , Zhang Pan
Published: July 2020

The Pisha sandstone area which was distributed in Ordos of Inner Mongolia was the main source area of Yellow River sediment. The area has a characteristic of serious composite erosion and fragile ecological environment. So it is an important prerequisite to identify the critical force occurrence conditions of compound erosion for prevent and control the multiple composite erosion. Using the method such as field observation, simulation experiments and literature review, this study preliminarily summarizes the dynamic critical conditions and key influencing factors of water erosion, wind erosion and freeze-thaw erosion.
Impact of climate zone migration on geographical distribution of indigenous vegetation in Northeast China
Authors: Wu Yunyang , Li Shengju , Wang Xue , Zhang Yuehua , Gu Ye , Li Lan
Published: July 2020

Based on the relationship between climate and vegetation, this study uses the time lag of vegetation response to climate change, simulates the dynamic response process of different vegetation types to climate change, retrieves relevant literature and collates data, and deduces the actual occurrence and geographic distribution of vegetation under the current climate potential and future climate change scenarios. This experiment infer the adaptation relationship between plant geographical distribution and climatic conditions. The results show that the plants in Northeast China are generally more adaptable to climate change. The areas with poor adaptability are mainly at the junction of forest shrubs and grasslands. The geographical distribution of plants has changed, accounting for about 5%. The grassland ecosystem in the bush-grassland transition zone in the Greater Xing’an Mountains is also less adaptable to climate, accounting for about 35%. The vegetation in these areas tends to degenerate. The geographical distribution may change. The adjustment of plants in Northeast China to the future climate change is usually reasonable. 84% of the vegetation changes are positive changes. Especially in the eastern regions, the vegetation deduction conditions will be improved in the future, and the vegetation coverage in these regions may be improved. About 79% of the potential changes in vegetation can adapt to the future climate. Nevertheless, the grassland ecosystems in the Greater Xing’an Mountains and parts of Inner Mongolia are less adaptable to future climate change and tend to degrade. It provides new ideas for assessing vegetation adaptability or ecosystem adaptability. Research on the interaction between climate change and terrestrial ecosystems of different scales needs to be strengthened in the context of global change.
The Impact of Historical Building Environmental Hazard Rescue Exercises on the Concept of Firemen
Authors: Chen Shien-Yi , Chang Yu-chuang , Chou Chung-Chyi , Chen Yi-Ching , Ou Yu-Chih
Published: July 2020

In this experiment, the firefighters perform the cultural assets disaster rescue drills before and after the cognitive differences as the core of the experiment. Firefighters develop education in the face of various types of building rescue training, but they lack the type of historical and historical buildings, which are fundamental in nature. The difference between the rescue target and the rescue tactics, and other types of building rescue methods can hardly be applied. The subject of this experiment is to introduce fire rescue resources (public assistance) after the failure of self-disaster prevention (self-help, co-help), and the research object is based on historical building. After many field surveys, knowledge training and actual exercises, the comparison is performed. The fire extinguishing education and training research on historical monuments can improve the effectiveness of historical monument fire extinguishing and preserve the current status of historical monuments, can list the number of cultural relics rescue personnel from 30% to 60%, can increase the number of cultural relics from 20% to 50%, can answer the answer to the room rescue from 20% to 100%, can answer the perimeter protection focus from 40% increase to 100%, can say that the focus of the water is increased from 30% to 100%. From the data, through the drills, the correct rescue concept can be greatly improved, and the secondary damage of historical sites can be avoided, but the focus of the rescue is on the cultural relics. It still needs to be strengthened, so the drills still need to be handled with perseverance in order to be more implemented and popularized.
Effects of Gradient Concentration of Colchicine on Callus Induction and Differentiation ofRose rosea
Authors: Dai Jianan , Zhang Yaosheng , Gu Ye , Wen Bin , Guan Jinqiu , Li Lan
Published: July 2020

To induce polypoid plants ofRosa rugosa tunb, the effect of the interaction between the concentration of colchicine and the treatment time on the callus induction and differentiation ofR. rugosa tunbwas studied using colchicine as the inducer. The colchicine immersion method was selected, and the callus of redRosa rugosa tunbwas immersed in colchicine of different concentrations for 2h, 4h, and 8h. The best culture medium for inducing callus was as follows: MS+1.0mg/L6-BA+0.1mg/L NAA+9.0 g agar+30.0g sucrose. After cultivation, the callus was dense in texture, light green and obviously granular. After the callus was immersed in colchicine, the combination of different colchicine concentrations and treatment time had an interaction with the callus. Therefore, the best treatment method for polyploid-inducedRosa rugosa tunbpolyploid should be higher colchicine combined with shorter processing time. This experiment can provide experimental basis and theoretical basis for cultivatingRosa rugosa tunbpolyploid plant with excellent traits, thereby increasing the content of essential oil in the plant itself.
Study on the analysis of simulated rainfall test for multifunctional planting net
Authors: Wu Meng-Ju , Hsu Chun-Li , Liang Chou-Fu
Published: July 2020

In this study, Japan’s multifunctional materials company was used to provide the phytosanitary materials jointly developed by Yamaguchi University, and the red soil of the National Pingtung University of Science and Technology Soil and Water Conservation Experimental Zone was used as the experimental soil matrix to test the densities (SP45 and SP60) and slopes (25, 35 and 45degree) of different paving under the rainfall simulating test (with I=80mm/hr). The analysis found that uses the multifunctional planting net can effectively reduce runoff and soil loss. The steeper the slope, the more runoff and soil loss it produces. Multifunctional planting nets with higher density can reduce the effect of runoff and soil loss, this statistics have not yet reached significant variance levels. This experiment is discussing the slope commonly used in engineering. These results can be used as a reference for further experiment planning.
yunOptimization of Test Conditions for TPA Texture Properties of Avocado Flesh
Authors: Ma Huifang , Liu Yijun , Tu Xinghao , Deng Dongyan , Ye Jianzhi , Yang Chunliang , Du Liqing , Li Liyun
Published: July 2020

In order to determine the optimization of test conditions for TPA texture properties of avocado flesh, the method of TPA was used to explore the effect of different compression locations and test parameters on the texture properties. The results showed that the middle part of the avocado flesh was the best part for testing the texture properties. through the correlation analysis of the measured values of texture properties by the avocado flesh, the hardness, springiness and cohesiveness were determined as the key investigation indications. The compressed speed had a significant effect on hardness and cohesiveness, and the compression distance had a significant effect on hardness and springiness. The optimization test parameters of avocado flesh were compression speed of 1mm/s and compression distance of 8 mm.
Direct shear test and model prediction analysis of unsaturated silt
Authors: Zhou Huiwen , Zhao Peng , Du Xueming
Published: July 2020

In order to study the mechanical properties of Unsaturated Silt in the east of Henan Province, the influence of water content, normal stress, degree of compaction and dry density is studied through direct shear test and model prediction. The results of direct shear test show that with the increase of moisture content and normal stress, the shear deformation of soil gradually changes from softening to hardening, and the higher the dry density is, the more obvious the phenomenon is. In addition, the cohesion decreases with the increase of water content, and the curve is broken line, and the turning point appears near the optimal water content; the influence of water content on the internal friction angle is small, and the internal friction angle increases with the increase of dry density at the same water content. At the same time, the hyperbolic model can well predict the direct shear test results, especially in the case of high normal stress, low density and high moisture content, the more the model prediction value is close to the test value.
Experimental Research on Advanced Treatment of Secondary Wastewater Treatment in Dairy Processing Industry by Reverse Osmosis
Authors: Jiang Tao , Wang Shuai , Wei Lina , Shan Dechen , Zhang Yun
Published: July 2020

This article will study the application of reverse osmosis advanced treatment technology in the secondary processing of wastewater in the dairy processing industry from the perspective of wastewater quality characteristics, and discuss the characteristics, application principles, and experimental design of the technology. This article will further analyze the effects and existing problems of deep treatment of reverse osmosis through experiments. Through a series of tests, we found that the temperature of the inlet water, the pressure of the system operation, the quality of the inlet water, etc., will all have a certain effect on the efficiency of the deep treatment of reverse osmosis and the long-term stable operation of the device. Then, this paper proposes some improvement and optimization measures for these problems. Through the long-term operation test, it is found that the most prone problem in the operation of the reverse osmosis device is the problem of membrane fouling. Based on this, an optimized treatment process based on the dairy processing industry secondary treatment wastewater treatment project is proposed. For one thing, this process can improve the water production rate and the recovery utilization rate of the secondary treatment wastewater. For another, it can reduce membrane pollution, reduce the cost of system operation and maintenance, and increase the service life of the device.
Study on the preventive Measures of Oxide Skin of 12Cr1MoV alloy steel Superheater
Authors: He Fengyuan , Wang Fei , Niu Ruqing , Li Yao
Published: July 2020

Through the analysis of the formation and structure of the oxide skin of 12Cr1MoV alloy steel, the formation mechanism of the oxide skin was studied, the causes and influencing factors of the oxide skin formation were obtained, and the measures to prevent the formation and fall off of the oxide skin of 12Cr1MoV superheater were put forward. The purpose of removing the oxide skin could be achieved by cleaning the formed oxide skin of the superheater.
Improved stability of Graphene Oxide in Salt Water modified by Situ Polymerization
Authors: Zhang Jing , Wang Jin-Jian , Wang Yao-Guo
Published: July 2020

A modified Graphene Oxide (GO) with excellent water dispersion, high salt tolerance and good temperature resistance was prepared by grafting short chain water-soluble polymer onto small particle size (200.5nm) GO as the matrix by in-situ radical polymerization. The functional groups, particle size, thermal stability, water dispersion stability and salt tolerance of m-GO (m-GO) were studied by FTIR, DLS, TG and stability analysis, respectively. FTIR analysis shows the significant characteristic peaks of water-soluble polymer chains. In addition, the average particle size increases from 200.5nm to 360.5nm and Zeta potential changes from -27.5mV to -4mV for GO and m-GO, indicating the successfully modification of polymer chain into GO. From TG analysis, thermal stability of m-GO is also greatly improved, as the initial thermal decomposition temperature increases from 88°C (mass loss of 5%) to 197°C. The stability analysis reveals that m-GO has well dispersibility in water solution under room temperature for 180d and excellent salt tolerance under several high temperatures for more than 90d.
The Electrochemical Impedance Spectroscopy Features of the Lithium Nickel Manganese Cobalt Oxide Based Lithium Ion Batteries During Cycling
Authors: Haiqing Xiao , Ziqiang Tao , Hong Bai , Hongwei Wang , Yanling Fu , Nianpeng Si , Hua Bai
Published: July 2020

Electrochemical impedance spectroscopy (EIS) is a viable approach that can be used in lithium ion batteries (LIBs) to investigate the electrochemical behavior. In this paper, Lithium Nickel Manganese Cobalt Oxide (NMC) type lithium ion batteries were divided into four groups. They were charged and discharged under various currents. The results showed that the higher the charging or discharging currents were, the faster the NMC batteries capacities fading were. In order to investigate the electrochemical behavior of the NMC batteries during cycling, we established an equivalent circuit model including one capacitor element in parallel with resistor and one constant phase angle element in parallel with resistor elements to study the impedance characteristics of the NMC batteries. The simulated results indicate that when the capacities of the batteries are dropping, the sum ohmic resistance of them will go up, and the resistance of Li+ diffusion through the SEI layer keeps increasing during cycling. The charge transfer resistance of the NMC batteries decreased at first and then kept increasing after 100 cycles. Among the three parameters, the charge transfer resistance values are the most sensitive factors that are corresponding to the state of charge of the NMC batteries during one single discharging process. We think that the internal ohmic resistance values can be used to predict the state of health (SOH) of the batteries and the charge transfer resistance can be used to predict the state of charge of the NMC batteries.
Research on Optimization of Tracking Equipment Based on In-transit Materials
Authors: Teng Juan , Bao Na , Ai Xiufeng , Ma Ning
Published: July 2020

As an important link in the transportation of materials, material tracking management is becoming more and more important.In-transit material tracking management is to carry out relevant decision management on the basis of obtaining material information in-transit, so as to achieve the purpose of improving logistics transportation service level, improving customer service satisfaction, maintaining customer loyalty, and further realizing the sustainable development of logistics enterprises. In this paper, through tracking a series of materials in transit, to achieve the goal of optimization, and using related logistics information technology and geographic information technology such as GPS, GIS, GSM to develop optimization management plan and do a good job in tracking management can improve management service level and product quality and quality.
Design of and Research of Impact Absorber Based on Synthetic Material
Authors: Huang Jinfei , Zhu Huaiqiu , Chen Wenbin , Lin Wanglin , Lu Jun , Wang Ze , Wang Dianwei
Published: July 2020

This paper carries out the design and research work of related testing equipment, and successfully develop a vertical deformation measuring instrument based on the surface layer of synthetic material. The design principle is that simulates the human body by dropping a weight of a certain mass from a prescribed height according to the law of conservation of energy movement process. In the whole process, the potential energy of the object has converted into kinetic energy, and the test piece forms an impact. The energy data absorbed by the test sample is collected by the impact sensor, and the sensor is sampled at a high frequency using a high-speed data collector and divided into its transmission to the computer system. Then the computer system records, analyses, processes, and calculates the collected data in real time, and displays the pressure change curve of the entire impact process, and finally calculates the impact absorption value of the tested surface during the entire process.
Improving the Cycling Stability of LiCoO2 at 4.5 V by Mg Doping and Graphite Coating
Authors: Song Shipai , Peng Bangheng , Peng Xiaoli , Zhang Xiaokun , Xiang Yong
Published: July 2020

Mg doping and graphite coating are applied to the LCO materials at the same time, thereby improving the structural stability of the LCO and the electrode conductivity at the same time. cLCO-0.02Mg displays the best cycle performance with a high capacity of 146.2 mAh/g after 60 cycles, corresponding to the 79% capacity retention of the initial discharge capacity. And cLCO-0.02Mg displays the best rate performance among the three samples with a high capacity of 41.1 mAh/g at 5 C. Mg doping helps to improve the structure stability, resulting in improving the cycle stability. Graphite coating enhances the electronic conductivity among the LCO particles, indicating a lower internal resistance, thereby resulting in the cycling performance improved.
Influence of Cycling on the Electrochemical Impedance Spectroscopy for Lithium Iron Phosphate Batteries
Authors: Xiao Haiqing , Bai Hong , Tao Ziqiang , Wang Hongwei , Fu Yanling , Si Nianpeng , Bai Hua
Published: July 2020

Electrochemical impedance spectroscopy (EIS) is one of the most effective methods that can be used to study the cycling decay behavior of lithium ion batteries (LIBs) without destruction of the battery. In this paper, in order to understand and to analyse the impedance response of the Lithium iron phosphate (LFP) batteries during various cycling rates, an equivalent circuit model (ECM) is established to investigate the cycling influence on the ECM parameters of LIBs. The influence of the discharging process on the patterns of the ECM was also analysed. The results indicate that the sum ohmic resistance and the Li+ diffusion through the SEI layer resistance keep increasing and the charge transfer resistance drop during the cycling when the retention capacities are higher than 90%. While the LFP batteries cycle under 1 C, the charge transfer resistance of them drop at first and then increase significantly after around 200 cycles when the retention capacities are lower than 80%. The results also show that when the LFP batteries are discharged during one single cycle, the sum ohmic resistance, the Li+ diffusion through the SEI layer resistance and the charge transfer resistance keep increasing. The results in this study indicate that EIS is a useful tool to obtain information for monitoring the state of health of LIBs.
Parameter-Variable Experiments for Conductivity of Acid Etched Fractures
Authors: Ming He Chun , Fu Duan Gui , Jun Cai , Chao Wang Xiao , Gang Wu
Published: July 2020

Conductivity of acid etched fractures is the decisive factor of results of acidizing treatment. At present, tests for etched fracture conductivity are in all cases executed using fresh acid under fixed experimental conditions, which determines that the test results can only capture fracture conductivity of the near-wellbore zone. This paper investigates fracture conductivity in cases of varied acid concentrations, temperatures, fracture widths and flow velocities along the fracture length direction, via the parameter-variable experiment for fracture conductivity. Results show that the combined changes of acid concentrations, fracture widths and injection rates have considerable impacts upon the conductivity distribution of etched fractures along the fracture length. Maximum etched fracture conductivity occurs within a certain distance from the wellbore. Variation of acid concentration along the fracture length is the main reason for changes in fracture conductivity, while variations in fracture widths and acid flow velocities may greatly reduce the effective etching length of the etched fracture.
Experimental Study on Ring Stiffness of Cable Conduit
Authors: Li Xing , Chen Liang , Wang Haochen , Fan Di , Zhang Lei , Zhang Xuhui
Published: July 2020

Ring stiffness is an important factor in the construction and design of buried cable conduit, which determines whether the pipe can resist external forces for a long time. This paper focuses on the experimental study of the ring stiffness of cable conduit. The ring stiffness tests of chlorinated polyvinyl chloride (CPVC) and modified polypropylene (MPP) under different conditions are carried out to verify the influence of thickness and temperature on the ring stiffness of pipe. The test results show that both thickness and temperature have a significant effect on the ring stiffness of pipe. At the same time, the influence of temperature on the ring stiffness of different materials is different, and the possible reasons are analyzed. The conclusion of the experiment has guiding significance for the quality inspection and practical application of cable conduit.
Application research of liquid CO2 fracturing in coal seam penetration
Authors: Liu Hao , Hao Wandong
Published: July 2020

Aiming at the characteristics of high gas content and low gas permeability in coal seams, high-pressure gas generated by the liquid phase transition of liquid CO2 is applied to the coal rock mass to produce a cracking effect. By analyzing the cracking process of CO2, using linear elastic fracture mechanics to analyze the crack propagation conditions and the damage and failure criteria of the coal body under the action of liquid CO2 blasting, the crack expansion state at different times were numerically simulated by the finite difference software ANSYS_LS_DYNA3D. Field tests show that CO2 cracking can improve gas drainage efficiency in the mining face.
Experimental Investigation on the Abnormal Measurement of Gas Pressure during Canister Desorption of Coal Cuttings
Authors: Zhang Xianshang
Published: July 2020

Accurate measurement of gas pressure during canister desorption of coal cuttings is an important foundation to prevent coal gas dynamic hazards and determine gas content of coal by volumetric method. It was a new finding that gas pressure in the insulation canister increased and then decreased during the initial desorption stage in the field test, which was different with common sense about gas desorption law. We took a series of experiments to explore the possible reason for this in the laboratory. The experimental results have shown the abnormal measurement of gas pressure was caused by the temperature decrease induced by adsorbing the heat and less external energy during canister desorption. The test condition was a key factor to accurate measurement of gas pressure in the canister. These findings offered insight into the temperature variation and also changed our understanding of the temperature effect on the gas pressure measurement during canister desorption of coal cuttings. The temperature variations induced by the adsorbed gas desorption should be taken into account in engineering application, especially the accurate measurement was applied for the initial stage of gas desorption.
Effects of coupling radiation on detonation parameters of inert explosive: a MC+thermodynamics study
Authors: Wang Jin-tao , Yu Wen-li , Wang Tao , Hang Gui-yun , Zhang Cong
Published: July 2020

Influences of neutron & γ mixing radiation field on decomposition speed and detonation parameters of long-term storage explosive molecular have been performed by a combined MC+thermodynamics method. The results show that energy deposition of neutron & γ transport in explosive components has a negligible effect on the decomposition speed, detonation speed and detonation pressure, but it significantly improves the detonation temperature of the explosive. The findings can be helpful for deeply understanding aging mechanisms for long-term storage explosive component, and improving its safety and reliability.
Comparative Study on Energy Dissipation Numerical Simulation of Different Energy Dissipators in Wide and Narrow Alternated Channels
Authors: Qin Feng , Tao Gang , Liu Weiwen , Wu Chengcheng , Qi Lijian , Li Jidong
Published: July 2020

This paper proposed clustered energy dissipators and ribbed energy dissipators in view of the energy dissipation of wide and narrow alternated river channels in mountainous areas. According to the structure and layout of energy dissipation piers, clustered energy dissipators are divided into several layout types: 1# “2-1 alternating” dissipator, 2# “2-1 inclined alternating” dissipator, 3# “4-3 alternating” energy dissipator; ribbed energy dissipator is divided into: 4# “ribbed” dissipator, 5# “ribbed + step-wise” dissipator. In this paper, we used a standard k-ε model to carry out 3D turbulent numerical simulation of energy dissipation of different energy dissipators in wide and narrow river alternated channels in mountainous areas, and analyzed its energy dissipation effect, which can provide design guidance for remediation and river bank slope protection.
SOC Estimation of Mine Power Supply Based on Improved BP Neural Network Algorithm
Authors: Ren Gaojian , Lin Yin , Sun Zhongguang , Shao Yan
Published: July 2020

Ni-MH, with high electric energy density and high stability, is the main backup battery of mine power supply. To improve the estimation accuracy of battery SOC (state of charge) and prolong its service life, this paper takes the single Ni-MH battery as the experimental object, and adopts an improved BP neural network that adds an adaptive rate momentum term to increase the discharged amount of electricity. The input characteristics of the network are the same as temperature, current and terminal voltage. According to the variance of the error between the expected output and the actual output of the training sample, the momentum term is adjusted; The adaptive learning rate is increased according to the change direction of the back propagation error. By comparing the standard BP neural network algorithm, the convergence speed is increased by 70%, and the generalization error is within 4%.
Development trend of protection technology for oil storage tank
Authors: Dou Ming-yuan , Liao Xiao-hua , Yang Shen-jun , Qin Ming-wei , Zou Shuai , Huang Fu-chuan
Published: July 2020

Petroleum is the lifeline of the national economy and an important strategic resource for the survival and development of the country. Nowadays, the main way of storage of raw materials and products in the petroleum and petrochemical industry is tank storage, so the operation, maintenance and anti-corrosion of storage tanks play a vital role in the industrial safety of the entire industry. This paper summarizes the development of tank anti-corrosion technology in petrochemical industry at present, discusses the mechanism of tank inside and outside corrosion, various anti-corrosion measures, highlights the importance of tank anti-corrosion protection, and looks forward to the future development of tank anti-corrosion technology. Petroleum is the blood of modern industry and serves the national energy security. The anti-corrosion measures of storage tanks are of great significance to the key deployment of strategic oil reserves in China.
Decoupling Analysis of the Relationship between Energy and Economic Development in Chongqing
Authors: Tao Aixiang
Published: July 2020

Since the Chinese government put forward the strategy of ecological civilization construction, great achievements have been made in the construction of ecological civilization in our country. At present, there are a series of uncoordinated phenomena among energy, environment, and economic development in China. Taking Chongqing as an example, this paper uses decoupling theory to study the relationship between energy, environment, and economic development. The results show that the environment and economic development in Chongqing have been decoupled, and the energy consumption and economic development have also been decoupled. The main reasons are as follows: the increase of investment in science and technology; the improvement of personnel quality and the adjustment of economic structure. Chongqing Municipal Government should further increase investment in education, science and technology, take more scientific and effective measures to adjust the industrial structure in order to achieve further coordinated development of energy, environment and economy.
Research on the Application of Acoustic Emission Intelligent Monitoring and Early Warning Technology for the Coal-rock Dynamic Disasters in Underground Mining Faces
Authors: Li Jiangong
Published: July 2020

Under the conditions of deep mining, it is difficult to predict the occurrence of coal-rock dynamic disasters accurately. The acoustic emission monitoring technology and equipment can realize the advanced monitoring and early warning for coal-rock dynamic disasters in deep mines, effectively make up for the problems such as single index of the dynamic disasters risk determination, low accuracy of early warning. And it can provide a basis for the prevention and control of coal-rock dynamic disasters such as coal and gas outburst, effectively assist the safe and efficient mining of the mines, and is the non-contact continuous prediction technology and equipment urgently needed for the safe and efficient production of the coal mines.
Application of Hydrogen Energy and Review of Current Conditions
Authors: Pan Aiqiang , Liu Jing , Liu Zhipeng , Yang Yunwei , Yang Xiu , Zhang Meixia
Published: July 2020

Energy reforms advance development of human civilizations. As environmental problems go increasingly severe, hydrogen energy which is featured by zero carbon emissions, high efficiency, easy storage and other advantages has won attention from researchers from around the world. China has rich hydrogen energy, and in the next energy reform, hydrogen will play an important role. This paper will introduce the application of hydrogen energy in industries, fuel-driven and electric cars, hydrogen storage and heat-power joint production in hybrid energy systems as well as the current development conditions. Typical study cases from different countries have been analyzed and interpreted. On that basis, the problems and bottlenecks for development of hydrogen energy in China are concluded.
Confirmation of Reasonable Position of iron tower for Gravel Soil in Transmission Line Project in South Part of Gansu
Authors: Ji Yanjun , Chen Liang , Zhang Xuelin
Published: July 2020

Based on the example of a power transmission line project in South part of Gansu, using the limit equilibrium analysis method, by Lizheng software, the safety coefficient of gravel slope under the tower load was calculated. The calculation results show that under the condition of safety coefficient of 1.25, the safe slope gradient is 39.3° in natural condition. The height of slope added from 9m to 11m, the safe slope gradient decreased from 31.1° to 29.2°, and the height of slope added from 11m to 18m, the safe slope gradient added from 29.2° to 39.2°. When the height of slope reached 20m, the iron tower has no effect on slope, the stability of iron tower was determined by stability of slope itself. After vertical load was applied, the safe slope gradient and shear stress inside of the slope changed seriously. Under 200kPa load, from the foot to top of the slope, the shear stress increased 35.27%∼93.1%, and on the top, 122.2%, maximumly, comparing with natural condition. This paper can provide a scientific basis for the later project in the same area.
Preliminary Study on Steam-Water Circulation System of Marine Small Nuclear Power Plant
Authors: Zhou Long-yu , Hou Ying-zhe , Wu Hao
Published: July 2020

Marine small nuclear power plants need to pursue the highest economy by improving the thermal efficiency of the steam-water circulation system. Based on the design concept of the steam-water circulation system of foreign nuclear-powered ships and onshore nuclear power plants, this paper proposes a preliminary heat balance diagram of the steam-water circulation system of marine small nuclear power plants, and comparatively analyzes the effect of initial steam pressure, condenser pressure and steam extraction pressure on thermal efficiency of steam-water circulation system. This study has certain guiding significance for the design of the general scheme of conventional islands in small marine nuclear power plants
Design of Intelligent Operation and Inspection Management System for Power Grid Equipment Based on Full Business Data Center
Authors: Gu Zhaoliang , Zhu Mengzhao , Zhu Wenbing , Zhou Jiabin , Zhu Qingdong , Wang Jian
Published: July 2020

There are some problems in the existing operation and inspection systems of State Grid Corporation of China, such as low level of system data integration, poor degree of functional application practicality. In order to solve these problems, the intelligent operation and inspection management system for power grid equipment has been designed based on full business data center. This system complies with the overall deployment requirements of the Internet of Things, including sensing layer, network layer, platform layer, and application layer. Based on the unified storage and management of the full business data center, the integration and service call of data information from 14 sets of operation and inspection systems could be realized. As a result, holographic perception of equipment status, active fault warning and prediction, and intelligent generation of operation and inspection decision could be realized by the designed system, which can promote the transformation of operation and inspection mode from business process driven to equipment status driven.
Study on nonlinear damage constitutive model considering the weakening of strength parameters
Authors: Chen Qingtong , Wu Zuoqi , Jia Xinguo , Zhang Junying
Published: July 2020

Take the mining damage of HuiTong coal mine’s deviated well bore cased by HongHui coal mine’s 1801-1 working face. The deformation of deviated well bore at different positions is calculated by probability integral method. The theoretical results are verified by actual damage of HuiTong coal mine’s deviated well bore. Evaluation criteria have been developed by analogy between actual damage of HuiTong coal mine’s deviated well bore and the theoretical results. Mining damage assessment of damage of HuiTong coal mine’s deviated well bore cased by HongHui coal mine’s 1801-1 working face was carried out. The research results have certain reference significance for recoverying the coal pillar of deviated well bore.
Design and Optimization of Fiber Optic Grating Pressure Sensing Array
Authors: Liu Honglin , Feng Tongyang , Lu Guan
Published: July 2020

Aiming at the haptic problem of robot hand pressure, this paper studies a fiber grating tactile sensor array. Using polydimethylsiloxane (PDMS) package, and the finite element simulation of the package body to obtain internal strain. Aiming at the strain field distribution when the robot hand is gripping, the design of preliminary sensor array and finite element analysis are carried out, and the improved particle swarm algorithm is used to further optimize the measurement points. It provides a theoretical basis for the subsequent construction of the measurement points of the FBG tactile sensor array detection system.
A Multivariate State Estimation Technique and Multilayer Forward Neural Network Framework on Steam Turbine Valve Flow Curve Simulation
Authors: Lu Kuan , Wang WenKuan , Meng Xiangrong , Li Jun , Pang Xiangkun
Published: July 2020

The Multivariate State Estimation Technique (MSET) is firstly implemented as the fault detection technique for monitoring parameters of the steam turbine valve. Second, healthy operation states are remained to form a preliminary dataset for the valve curve simulation. Then, the Forward neural network (FNN) based piecewise linear fitting method is used to simulate the steam turbine valve flow curve. With a MSET-FNN framework proposed, the simulation accuracy will be enhanced by removing the unhealthy operational states. In addition, the simulation process will gain a speed up with the utilization of GPU.
Numerical Simulation of Fracture-flooding in Class III Oil Reservoirs
Authors: Zhi Ji-Qiang , Jiang Nan , Liu Yi-Kun , Bai Ming-Xing
Published: July 2020

Daqing oilfield has entered into the stage of extra-high water cut development, and the Class I and Class II Oil Reservoirs have been successively developed and completed chemical flooding, which has a significant recovery efficiency, while the Class III Oil Reservoirs, which are primarily thin and poor reservoirs and out of surface reservoirs, are mainly developed by water flooding, with low water drive recovery. Chemical flooding and stimulation and injection are not effective to further enhance the recovery of the Class III Oil Reservoirs. In view of the special reservoir and development characteristics of the Class III Oil Reservoirs, a new concept of “Class III Oil Reservoirs fracture-flooding to enhance oil recovery” is put forward. By using numerical simulation technology, the seepage field and flooding effect of the Class III Oil Reservoirs before and after fracturing-flooding are studied to provide technical support for the development and exploration of the Class III Oil Reservoirs in Daqing oilfield.
Application of high pressure hydraulic slotting in pressure relief and permeability enhancement of coal roadway
Authors: Li Chengcheng
Published: July 2020

In view of the coal seam without protective layer and the first coal seam with outburst risk, the method of high-pressure hydraulic slotting through layer drilling can be adopted to reduce the gas content in the strip of the coal roadway and realize the rapid driving of the coal roadway. Based on the practice of Xin-ji coal mine, the high pressure hydraulic slotting test is carried out. The results show that after adopting the high pressure hydraulic slotting measures, the radius of the slotting is 2.10 m, and the cumulative coal output is 3.25 ‰ of the raw coal in the coal lane. The permeability of coal seam is 25 times that in the uncut area, and the average single hole extraction volume is 3.21 times that in the uncut area. The effective radius of 30 days and 60 days after cutting is 2.3 times and 2.1 times of the original drilling. 49% of the drilling work quantity and 38% of the standard time of extraction are reduced. The driving speed of coal tunnel is 1.65 times that before adopting hydraulic cutting measures. Therefore, the high-pressure hydraulic slotting through the layer drilling can provide reference for the gas prevention and control work in the similar conditions of coal seam and the first coal seam with outburst risk.
Numerical Study on Vectoring Primary Flow with Adjacent Synthetic Jet with Dip Angle
Authors: Gao Feng , Zhang Qian , Chen Fengli , Zhang Chengtao , Xia Xuefeng
Published: July 2020

Based on the full flow field calculation model of the synthetic jet actuator-X-L model, numerical simulation is carried out on the influence of the main parameters of the directional control of the adjacent synthetic jet actuator, and the parameters of the actuators of different adjacent synthetic jets are analyzed. The amplitude, frequency, and phase difference of the device were analyzed. The results show that the larger the amplitude of the synthetic jet actuator, the more obvious the control effect of the synthetic jet on the main stream; the synthetic jet actuator has an optimal frequency, so that the main stream deflection efficiency is the highest, and the inclination angle lowers the optimal frequency, which reduces the requirement of the flow field control on the actuator frequency; the actuator phase difference makes the control efficiency adjustment width of the mainstream increase significantly, and there is an optimal phase difference, while right Side actuator phase advancement is more efficient than hysteresis control.
Research on the development of DIE STEEL Industry in Huangshi based on SWOT analysis
Authors: Tang Min , Liu Sheng
Published: July 2020

DIE STEEL Industry is one of the most characteristic industries in Huangshi City. With the development of recent years, a relatively large industrial group has been initially formed. The number, industrial scale and market share of enterprises are all the first in China. In this paper, the SWOT analysis method is used to study the advantages, disadvantages, opportunities and threats of the development of Huangshi Die steel industry, analyze the problems existing in the industrial scale, product grade, innovation ability, ecological environment protection and other aspects of Huangshi Die steel industry, and put forward development countermeasures and suggestions to promote the high-quality development of Huangshi Die steel industry.
Application of P-median method in logistics node location
Authors: Chen Da , Xia Baodong , Li Zheng , Huang Jinxu
Published: July 2020

In view of the logistics node location problems, according to build logistics nodes needed to meet the timeliness and economic cost minimization requirement, combined with the specific case, write the corresponding algorithm program, based on P - value model which is constructed and improve the plan of site selection of logistics company division static P - value model, the plan of site selection of dynamic for selection of logistics node provides an effective analysis method and the decision basis, to solve the problem for a class of the actual location.
Dynamic real estate project cost prediction based on SIMCA-P
Authors: Tang Xiaodong , Zhang Xiaojie
Published: July 2020

with real estate projects as study cases, this study explored the influencing factors (contract term, project visa, project changes, etc.) for dynamic cost control and performed numerical analysis on these factors. The SIMCA-P software was used to perform partial least squares (PLS) regression on the actual cost and a regression prediction model was built. The difference between the checked cost and that forecasted by the model was compared, the reliability of the mathematical models for the residence projects was verified. The research results show that the explanation capacity of the explanatory variables for the dependent variables reached 0.937, which means that all these before-mentioned factors had significant impacts on dynamic cost control. The average error of the predicted residence cost obtained by the model based on actual data was 0.006582346, indicating the high prediction accuracy and that the PLSs regression method performed well in solving the multiple correlations between independent variables. Therefore, the PLS regression method could provide a good solution for prediction of dynamic cost of real estate projects.
Structure selection and analysis of tower 6a and 6b in weihai civic center
Authors: Zhang Xiaomeng , Liu Wenting , Zhou Yilun , Wang Lei , Liu Ziao , Liu Shuai
Published: July 2020

Weihai civic center covers an area of 193,100 square meters and consists of four high-rise buildings and large podium buildings. The building is divided into two parts through structural joints, with two towers forming a frame-core tube structural system and the lower podium as a frame structure. Through the selection of different structural systems, the selection and structure of the structural system are analyzed.