bluuebunny/crossref_metadata_2025 huggingface dataset:
Research on Energy Consumption Analysis System of Large Buildings Based on Big Data Monitoring
Authors: Meng Bin , Ji Xinyang , Hu Gaoshan
Published: February 2021

Public buildings should install itemized electricity metering devices. The thesis establishes an energy consumption monitoring system and ensures that the energy consumption statistics are true and complete. The characteristics of big data on energy consumption of public buildings are analysed. At the same time, the article expounds the design thinking and implementation strategy of the big data public building energy consumption monitoring system. The building energy management system can monitor the status of energy-consuming equipment, with more detailed and broader classification, and realization of energy consumption decision feedback and optimized control.
Performance evaluation of main transformer equipment suppliers for 500kV main transformer equipment
Authors: Jiang Yinghan , Dong litong , Chen yinghua , Ge yanqin , Wang mingxue , Zhang jinliang
Published: February 2021

Scientific evaluation of the main transformer equipment suppliers is the premise to ensure the cost control and safe operation of the power grid. Based on the analysis of various factors affecting the main transformer equipment supplier, the evaluation index of the main transformer equipment supplier is constructed. Considering the fuzziness of the evaluation index, the index weight is determined by AHP, and the evaluation model of main transformer equipment supplier based on fuzzy comprehensive evaluation is established. The example calculation shows that the fuzzy comprehensive evaluation method can fully reveal the evaluation index information and reflect the actual situation of main transformer equipment suppliers scientifically and reasonably.
Research on Dynamic Evaluation of Distributed Energy Supply Cost-Benefit for Integrated Energy Service in Campus
Authors: Yin Shuo , Wang Shiqian , Yang Meng , Chai Zhe , Yan Jing , Chang Qing
Published: February 2021

Zones are natural test fields for integrated energy services. The main operating mode of distributed energy supply business is “energy equipment leasing”, which means that users only have the right to use the equipment, and the power distribution company has the ownership of the equipment. Distributed energy supply business uses energy with lower cost and more environmentally friendly processes, in conjunction with related energy equipment, to provide users with daily required cold, heat, electricity, and gas energy for production and daily use. It not only effectively reduces the energy cost of users, but also achieves good environmental protection effect, and it can ensure that the distribution company can recover the initial investment and earn reasonable income. Therefore, this article analyses the cost-benefit structure of the distributed energy supply business based on the working characteristics.
A new energy-saving and convenient dump truck system
Authors: Li Yiheng
Published: February 2021

Traditional lift dump trucks complete unloading by raising the center of gravity of the carriage, which often requires too much extra energy input and is inefficient. This paper improves the structure of the traditional dump truck and proposes a new dump truck system that integrates energy saving and convenience. The system as a whole includes conveyor belt system, driving system, automatic turntable system and solar thin film battery system. Based on theoretical calculations and modeling, the transmission efficiency and energy saving of the traditional dump truck and the new system are compared. The results show that the new system has higher transmission efficiency, lower energy consumption, and can achieve different directions through automatic rotation unloading, which also very well verified the superiority of the system.
Study on the Real-Time Assessment Method of Maximum Output of Thermal Power Unit by Air Blower Current
Authors: Liu Ke , Yang Xinsen , Zhang Xuhui , Zhang Xudong
Published: February 2021

By analyzing a large number of data about the air blower current and the unit output, this article establishes the relationship model between the air blower current and the unit output. This model has realized the function of dynamically evaluating and correcting the maximum unit output by monitoring and analyzing the air blower current, which provides support for controlling the capacity of the unit to adjust peak value upwards in real time.
Design and benefit analysis of intelligent distributed photovoltaic microgrid system in plateau Alpine Region
Authors: Wu Min , Pu Zewei , Mu Sangyongla , Wang Wenyang , Liu Chengpeng
Published: February 2021

Intelligent distributed photovoltaic microgrid technology is conducive to the rational and large-scale development and utilization of solar energy resources, which is one of the important components of the future power system in Plateau and alpine regions. However, the efficiency of solar energy collection and utilization is greatly affected by the natural environment, and it is unstable, random and uncontrollable. Therefore, the reliability of power supply and the quality of power supply have become the breakthrough problems of intelligent distributed photovoltaic microgrid technology. In view of the stable operation of the intelligent distributed photovoltaic microgrid system in the plateau alpine region, this paper designs the photovoltaic module, energy storage management system and real-time monitoring system of the micro grid system, and analyzes its benefits.
Numerical Simulation of Propellant Diffusion Considering Chemical Reaction
Authors: Zhan Xiang , Cui Cunyan , Zhao Zelin , Li Donghao
Published: February 2021

The reaction mechanism of UDMH and NTO propellant vapor under storage condition was analyzed in order to develop emergency measures for propellant leakage in extreme cases. The distribution of propellant vapor concentration, reaction products and temperature in a closed space were studied by numerical simulation. According to the results of numerical simulation, the propellant concentration distribution, resultant of reaction distribution, as well as temperature distribution was obtained. Results showed that the leakage diffusion process can be divided into three stages: heavy gas deposition stage, rapid reaction stage and equilibrium diffusion stage. In the heavy gas deposition stage, propellants are mainly affected by gravity. During the rapid reaction stage, the chemical reaction between propellants plays a certain role in the diffusion process. In the equilibrium diffusion stage, the bottom temperature of the confined space increased significantly, the highest temperature reached 306K.
A multi-source data collection and information fusion method for distribution network based on IOT protocol
Authors: Cai Yongxiang , Xiao Xiaobing , Tian Hao , Fu Yu , Wu Peng , He Hongliu
Published: February 2021

With the construction of Global Energy Internet, Intelligent distribution network has more and more characteristics of multi scene, multi service and changeable measurement and control objects. In order to realize data collection and information exchange among the intelligent terminal and energy, power grid, load, energy storage and other control resources in distribution network, we should research an architecture which can adapt to various data sources Based on dynamic self describing protocol.
Introduction on Research and Application of Nickel Base Superalloy GH4169
Authors: Zheng Jianjun , Guo Yang , Liu Xiao , Zhang Zhihao , Zhang Tao
Published: February 2021

In this paper, the research and application of nickel base superalloy GH4169 in recent years was introduced. GH4169 alloy is a precipitation strengthened nickel base superalloy, which has been widely used in aeroengine, petroleum, nuclear industry and other fields. The phase composition, three common heat treatments as well as the application prospect were elaborated. At last, the service temperature range and application area of GH4169 alloy was believed to be further expanded with the adjusted alloy composition and the corresponding hot working process.
Research on development problems and countermeasures of distributed photovoltaic power generation projects
Authors: Li Qiaoqiao
Published: February 2021

In China, photovoltaic industry has developed rapidly in recent years, and distributed photovoltaic power generation projects account for an increasing proportion of the overall photovoltaic projects. Distributed photovoltaic power generation projects are facing many problems after the “531 New Deal”. For example, small and medium-sized photovoltaic companies are facing difficulties in financing, market-oriented transaction mechanisms need to be improved, related technologies need to be further improved, and the development and approval process is relatively cumbersome. Innovative financing methods are required, Multi-channel financing, through policy support, promoting system reform, increasing technological innovation, and integrating with other industries to seek further development.
Analysis and Treatment of Abnormal Vibration of Unit 2 in a Power Plant
Authors: Chen Fei , Cao Hao , Zhang Bolin , Wei Jilong
Published: February 2021

The Unit 2 in a power plant was first started in 2016 after the flow through transformation, the vibration basically reached the excellent standard in the single valve state with the load running. In the sequence valve state, the high and intermediate pressure rotor occurred obvious steam induced vibration fault at high load. By reducing the main steam pressure properly, the No. 2 regulating valve is in full open state as soon as possible, thus reducing the steam exciting force of the high and intermediate pressure rotor, the vibration fluctuation value of the unit is obviously reduced at high load, and the phenomenon of steam induced vibration is effectively suppressed, and the unit can be safely carried out for a long time.
Analysis of large scale fracturing effect and influencing factors in low permeability oil reservoir
Authors: Lin Liu
Published: February 2021

H Oilfield is a complex fault field. Due to poor physical properties, it is still difficult to effectively inject wells after fracturing. In addition, the repeated fracturing effect has deteriorated year by year. Most of the blocks are generally low in production, and the oil recovery speed is less than 0.31 %. Since 2014, large-scale fracturing field tests have been carried out in H Oilfield. By analyzing the influence of various factors on fracturing effect, the grey correlation method was used to analyze the influence of various factors on oil production after fracturing. The results showed that the main factors influencing the fracturing effect in the test area were formation coefficient, porosity, oil saturation, amount of sand carrying fluid, amount of fracturing fluid, and amount of sand added. The research results can be used for reference and guidance to improve the development level of low-permeability oil fields.
Research on Smart gas safety supervision system based on IOT technology
Authors: Ni Na , Yang Fan , Wang Chaonan
Published: February 2021

Gas management units have a large number of gates to be supervised. This paper introduces an intelligent gas well management system. By installing all kinds of intelligent sensing terminals in the gas well, it can monitor the massive gas well in real time, and form the gas well internet of things with the help of NB-IOT technology, and gather the data to the data analysis cloud platform. Finally, the perception data is processed and analyzed in the data analysis cloud platform, so as to conduct safety supervision and accuracy of the massive gas wells. At the same time, it uses the historical monitoring big data collected by the system for a long time to build the risk prediction model of the gas well, and carries out the safety risk level assessment and fault prediction and early warning for the key gas well, so as to comprehensively realize the intelligent management of the gas well.
Numerical analysis of coal seam heat injection
Authors: Jia Quanmin
Published: February 2021

Coal seam heat injection is a new type of enhanced gas drainage method. In order to obtain the influence law of coal seam heat injection on the gas content in coal, the coupled equation of heat, fluid and solid multiphysics under coal seam heat injection is used to solve it with the help of numerical analysis software. the law of coal gas content change under the condition of coal seam heat injection is obtained: During the process of coal seam heat injection, the temperature of the coal near the heat injection borehole is relatively high. With the increase of the heat injection temperature, the adsorbed gas content in the coal gradually decreases, the free gas increases, and the residual gas content of the coal decreases more significantly. The extraction time was effectively shortened, and the expected goal of heat injection enhanced extraction was achieved.
Modelling the advantages of the DSM (deep slurry mixing) technology on the piling process of the plug-in steel
Authors: Liu Wenbin
Published: February 2021

The development of the bay area is restricted by the cross-sea comunacations. Recently, the bridge-tunnel system is a perfect solution for this question. The man-made island is a key connector in this system by connecting the bridge and tunnel, and creats a buffer zone of the comunacation. The plug-in steel cylinders are suitable structure for the constructure of the man-made island due to its convenience, reliablity, and low-cost. In practice, the sand layer and other hard soil layers challenges the piling of the cylinders, causing the structure failure of the cylinder and other problems. The pre-treatment with DSM (deep slurry mixing) technology is a effective way to improve the piling process. This paper models and analyzes the piling of the cylinder through the sand layer treated by DSM technology with in-site tests and numerical simulation method. The advantages of the DSM technology are highlighted and quantificated to make a contriobution in practice.
Corrosion failure behavior analysis and Countermeasures of gas transmission pipeline
Authors: Nan Zhang
Published: February 2021

in the process of natural gas pipeline transportation, due to hydrogen sulfide and other components in natural gas, it is easy to lead to pipeline corrosion, and leakage accident occurs in serious cases, which brings serious harm to natural gas production. The corrosion and anti-corrosion situation of natural gas pipeline transportation is analyzed to prevent various corrosion accidents and ensure the safe operation of long-distance pipeline system. According to different types of corrosion, the prevention of metal pipeline corrosion is given priority to, and then the corrosion treatment is carried out to avoid serious corrosion of pipeline, improve the safety factor of natural gas long-distance pipeline system, and meet the technical requirements of natural gas production.
Research and Countermeasures of interlayer interference in main reservoir of ASP flooding
Authors: Xing Juanjuan
Published: February 2021

According to the recognition of the industrial production of ternary compound flooding in a development zone, it is believed that the development mode of ASP flooding can expand the sweep efficiency, improve the development effect of a class of oil layers and further improve the recovery. However, the contradiction between A I 33 and upper A I 1-32 layers is prominent, which leads to uneven oil production, rapid rise of water cut in the production wells, short time of low value period and so on. In order to reduce the interlayer contradiction, the interlayer contradiction coefficient is introduced to study the interlayer interference law in different development stages of ASP flooding in combination with reservoir type and vertical heterogeneity of an oilfield, and the technical countermeasures for layered system development are put forward. The straight joint development technology is adopted in some potential areas of an l test area to exploit A I 3 reservoir, and the ideal development effect is achieved. The production degree of the reservoir is 88.3%, and the enhanced oil recovery is 26.23%.
The influence of compound heating power distribution on heat transfer
Authors: Sun Fan , Wu Wenfeng , Xi Junpeng
Published: February 2021

With the continuous deepening of oil and gas resource development, the number of large cargo tankers is increasing rapidly, and the tankers need to heat and keep the cargo oil in the tanks during navigation. However, the traditional steam coil heating method has many problems, such as low thermal efficiency and large total fuel consumption, which will cause energy waste and increasing oil tanker transportation costs. Microwave heating technology has the characteristics of fast, uniform and efficient heating, and is widely used in petroleum extraction and viscosity reduction of heavy oil. This paper proposes a new heating method of steam-microwave composite heating to heat the cargo in the tanker cabin. Taking a VLCC side cabin as a prototype, a three-dimensional numerical scale model is established through COMSOL software to study the influence of thermal efficiency under different power distribution between steam and microwave. The research results show that when the total power is constant, the smaller the proportion of microwave power, the more beneficial it is to improve the heat transfer efficiency in oil heating. This research has important guiding significance for improving oil heating efficiency and saving energy consumption.
Pitting corrosion behavior of metal materials and research methods
Authors: Wang Fan , Shan Qiaoli , Zhang Fan , Lu Feng , Li Jinling , Yu Tao , Qu Chengtun
Published: February 2021

Pitting corrosion occurs easily in metal pipelines containing corrosive media, which leads to premature failure of pipelines, oil, gas and water leakage, and increases the risk of environmental pollution. In this paper, the conditions of metal pitting, several nucleation mechanisms, growth and repassivation processes of metal metastable pitting are summarized. Corrosion electrochemical measurement technology can reflect the behavior characteristics of metal materials in the process of corrosion. The application of pitting of metal materials in the medium is introduced by using such electrochemical measurement techniques as polarization curve, electrochemical impedance spectrum, electrochemical noise and scanning electrochemical microscope.
Study on influence characteristics of shield tunnel depth and spacing on settlement in clay strata
Authors: Cheng Jinguo , Jiang Yusheng , Jiang Hua , Meng Lingfeng , Chang Longfei
Published: February 2021

The surrounding ground disturbance and surface settlement induced by shield construction are the key problems of tunnelling control and necessary to be studied. Taking the shield tunnel project of Beijing Subway Line 14 as the research background, this paper studies the influence of tunnel spacing and depth on surface settlement distribution by numerical simulation method, and analyzes the relationship between the two factors and maximum settlement. The results indicate that the increase of tunnel depth or tunnel spacing leads to the decrease of the maximum settlement and the settlement reduction rate increases. With the increase of tunnel depth, the settlement trough presents approximately symmetrical distribution, and the symmetry axis is inclined to the first tunnel. With the increase of tunnel spacing, the superposition effect of twin tunnel excavation decreases, and the settlement trough transits from U-shaped to W-shaped with the maximum settlement decreasing relatively from single peak to double peaks. Also, the tunnel depth or spacing is highly correlated with the maximum settlement in a certain range, and the tunnel depth has a stronger linear correlation than the tunnel spacing. The research results provide certain theoretical guidance and references for the prediction of ground deformation and settlement control of shield construction.
Measures of Formation Damage and Protection in the Water-Injection Process —the A block in Xinjiang Oil Filed
Authors: Zhang Zhichao , Li Daiqiang , Xiao Hongrong , Han Fengze , Xu Rui , Liu Yuhang
Published: February 2021

On the basis of re-recognizing the geological characteristics of the reservoir in Well A, using laboratory experiments, statistical analysis and other methods, systematically carry out injection and production dynamic analysis in Well A, analysis of damage mechanism of water injection wells, analysis of reservoir damage factors and reservoir Research on protection technology, put forward suggestions on reservoir protection technology and augmented injection technology for well An area. Mixed injection of water is likely to cause insoluble scaling and lead to blockage of water injection pipelines and reservoir pore throats. Working fluids that are not compatible with the formation enter the formation and also cause blockage of the reservoir. Therefore, oil reservoirs must not only pay attention to reservoir protection measures during water injection development It is also necessary to strictly control the quality of the injected water and strictly select additional injection fluids to effectively protect the reservoir and carry out long-term and efficient water injection operations.
Research and application of asynchronous injection-production in ultra-low permeability horizontal well area
Authors: Chen Xiaoyan
Published: February 2021

When using horizontal wells to exploit ultra-low permeability oil fields, the development effect is usually ensured by increasing the scale of fracturing reconstruction. However, it also leads to the increasing difference of seepage capacity between matrix and fracture, which makes it easier to see water in horizontal wells after water injection and difficult to recover after water cut rises. Therefore, asynchronous injection-production test was carried out in the ultra-low permeability horizontal well area, making full use of the artificial fracture of horizontal well as the high permeability channel, and performing oil-water replacement through full imbibition between high and low permeability layers, so as to improve oil recovery. On the basis of theoretical guidance, during the summary of practice, the main factors affecting the implementation effect of asynchronous injection and production are gradually analyzed, and the reasonable parameters in the implementation process are clearly defined, so as to explore a new treatment method for the middle and high water cut stage in the ultra-low permeability horizontal well area.
Research on Protective Development of Wetland Ecological Resources in Poyang Lake
Authors: He Jianbo , Wang Zhen
Published: February 2021

As one of three major ecological regulatory systems in the world, wetlands play an important role in protection of ecological environment and biodiversity. As the largest freshwater lake in China, Poyang Lake is also one of the areas with the most abundant biological resources in wetland ecosystem in China, which has great ecological and economic benefits. In recent years, a string of problems inevitably exist in the further development of Poyang Lake wetland ecological resources. Based on comprehensive introduction of Poyang Lake wetland ecological resources, this paper makes a comprehensive analysis of its development and utilization status and existing problems. Besides, it also puts forward a series of strategies for protection and development of Poyang Lake wetland, in an effort to further protect ecological resources of Poyang Lake wetland and realize the sustainable utilization of resources.
A review of prediction methods for oilfield produced water scaling
Authors: Yan Yan , Yu Tao , Song Jiayu , Wu Baichun , Qu Chengtun
Published: February 2021

In oilfield development, pipeline corrosion and reservoir damage caused by produced water scaling are serious problems. Studying the scaling trend of produced water, and predicting the scaling position, scale amount, and scale type is of great significance to the production and development of oilfields, as well as scale prevention and cleaning. In this paper, the mechanism of scaling in produced water is studied from the perspective of five aspects: fluid incompatibility, thermodynamic condition change, crystal adsorption, kinetic factors and bacterial corrosion; moreover, other factors affecting the scaling are analyzed. Mathematical models of scaling prediction methods, scaling prediction methods, and simulation experiments of scaling prediction methods are introduced, and the characteristics of each scaling prediction method and simulation experiment are compared. Finally, the development of scaling prediction methods is prospected.
Analysis of influencing factors of wells with high operating pressure and suggestions for the next step
Authors: Shi Jing
Published: February 2021

At present, due to the high pressure and large overflow of the operation well, the operation cycle is long and can not be carried out normally, and the operation can not be carried out except by means of controlled injection and depressurization, shut-in and depressurization, and pressurized operation. As a result, the normal production of oil and water wells is seriously affected, the utilization rate of oil and water wells is reduced, and the production of oil fields is affected. Therefore, the influencing factors of wells with high operating pressure are analyzed and suggestions are made in the next step. In this paper, the main influencing factors of the wells with high operating pressure are found out by investigating the current situation of the wells with high operating pressure and analyzing the causes. All the factors are classified, and detailed analysis is carried out according to the corresponding influencing factors. The effective treatment methods and tracking mechanism are put forward to reduce the number of wells that can not operate normally due to high operating pressure.
Discussion on Deviation Correction Technology of Long Borehole in Gas Drainage
Authors: Xu Zunyu
Published: February 2021

To solve the drilling layer (especially small inclination to wear long borehole) deviation cause gas control drilling control range is not up to standard, large quantities and the problem of poor drainage effect in Xinji coal mine based on the analysis of borehole construction result in deviation in a variety of reasons, targeted in technology, management, system, equipment, and adopted a series of effective measures on the scene to “rectify”, puts borehole deflection can be controlled within the scope of reduced the drilling quantity, raise the drilling control ability, increase the gas control working time, realized the “technical economic integration”.
Analysis on the effect of direct reading seal checking instrument in seal checking
Authors: Jiang Sihao , Ma Ning , Jin Haibo
Published: February 2021

The advantages and disadvantages of common sealing methods are analyzed. Aiming at the low sealing rate of bridge type eccentric distribution pipe string packer in Daqing Oilfield, this paper starts with the structure of bridge eccentric distribution pipe string and normal operation and water flow direction during sealing, and combines with the sealing section method sealing principle, discusses the main factors affecting the sealing efficiency of bridge eccentric distribution pipe string. The direct reading sealing tester produced by Xi’an Stan company is optimized. The working principle and sealing process of the sealing tester are analyzed. The switch operation of injection well is optimized. The research results show that: using the direct reading packer, combined with the off on off water injection operation, can verify the sealing performance of the bridge type eccentric distribution pipe string packer, the sealing effect is intuitive, and the test success rate is high.
Study and application of reconstructing seepage field in high water cut and high recovery reservoir based on YSM oilfield
Authors: Li Xuewei , Wang Hongwei , Li Guopeng , Zhou Fushuang , Wu Hui , Chen Yufang , Tai Honglian
Published: February 2021

Through decades of development most of oilfields in china, has now entered high water cut and recovery degree are the “twin” stage, the reservoir physical property, well pattern evolution and the influence of injection-production dynamic, “twin” phase residual oil show the “overall scattered, local enrichment” distribution characteristics, enrichment of its dispersion characteristics not only show the macro distribution, injection-production control area at the same time also show the level of pore microscopic dispersion and enrichment conditions. The key to the study of residual oil in “double high” stage and the implementation of or lies in how to understand the well pattern injection and production seepage field under the control of geological factors.
On Sustainable Development of Rural Tourism in Jiangxi Province from the Perspective of All-for-one Tourism
Authors: Xiong Bojian , Zhong Xiaoyun , He Jianbo
Published: February 2021

A good ecological environment is the greatest advantage and precious wealth of rural areas. Developing rural tourism energetically can not only promote the development of rural economy, but also promote the transformation and upgrading of rural industrial structure. At present, under the background of all-for-one tourism development and policy support, the countryside has become the best carrier to undertake the quality leisure vacation demand of urban residents, and developing rural tourism has also become an important way to promote the development of all-for-one tourism. On the basis of combing and analyzing present situation of rural tourism development in Jiangxi Province and combining with background of all-for-one tourism, this essay puts forward paths and countermeasures of rural tourism development in Jiangxi Province aiming at providing insight and reference for transformation and upgrading of rural tourism in Jiangxi.
Research on Eco-geological Environment Carrying Capacity Based on GIS Technology
Authors: Duan Jianshu , Huang Jing , Chen Yufei , Du Ke
Published: February 2021

The environmental carrying capacity is also called environmental bearing capacity. The eco-geological environment carrying capacity is the limit of the environmental capacity to support human society and economic activities under a certain environmental condition in a certain period of time, combined with the factors of the ecological environment, the geological environment, and the socio-economic environment, it is an important basis for developing resources. Resources and the environment are the basis for human survival and development, with the development of society and the development of resources, the carrying capacity of resources and the environment in many areas has exceeded the limit, which has caused many environmental problems. Therefore, this paper studies the ecological environment carrying capacity based on GIS, hopes to provide some guidance for environmental protection.
Analysis method of renovation potential of hollow village in hilly area
Authors: Lei Na , Qu Shaodong , Dong Qiguang , Xiong Yufei
Published: February 2021

The long-term existence of Hollow Village wasted national land resources and was not conducive to the construction of new rural areas. Under the background of the lack of the evaluation and analysis of the remediation potential of Hollow Village in my country, the evaluation method of the remediation potential of the Hollow Village in the hilly area and the determination method and process of the potential correction coefficient are proposed, and the land remediation potential of Hollow Village in Chengcheng County is analyzed through an example. The research results can provide a basis for evaluating the remediation potential of Hollow Village, which is beneficial to the cost accounting of land remediation departments and the decision-making of competent authorities.
Tracing method of remote sensing exhaust analysis device
Authors: Yao Yao , Liu Jiajing , Liu Yu , Han Chao , Dai Jinzhou
Published: February 2021

Vehicle exhaust emissions are one of the main sources of air pollution. The remote sensing measurement system for vehicle emission pollutant can carry out real-time monitoring on vehicles running on the road, and screen high-emission vehicles, which has a significant effect on the regulation and control of vehicle exhaust. The scientific traceability of remote sensing exhaust analysis device can ensure the accuracy of the test data, thus ensuring the accurate screening of high-emission vehicles. This paper studies the traceability method of remote sensing exhaust analysis device, and develops the corresponding calibration device. It can realize the accurate traceability of remote sensing exhaust analysis device, and play a positive role in the application of this device and the control of vehicle exhaust.
Research progress of heterogeneous Fenton catalyst for organic wastewater treatment
Authors: Zhang Xin , Zhang Qiaosheng , Yang Tao , Li Yanfang , Li Jinling , Yu Tao , Qu Chengtun
Published: February 2021

The catalytic degradation of organic wastewater by heterogeneous Fenton has attracted much attention in recent years. Compared with homogeneous Fenton, heterogeneous Fenton reaction has the advantages of wide pH range, low dissolved iron content after reaction, easy magnetic separation and good reusability. This paper mainly introduces the research progress of heterogeneous supported Fenton catalyst in the treatment of organic wastewater in recent years. In this paper, the degradation performance and recyclability of organic wastewater by catalysts are discussed, and the development direction of catalysts in the future is prospected.
Pollution Source Analysis of Heavy Metal and Ecological Risk Assessment in Urban Fringe
Authors: Liu Siqi
Published: February 2021

With the rapid development of modern urbanization, the unreasonable industrial structure has impacted urban environment, which greatly restricts the use of land resources safely. Especially in some cities with rapid urbanization, on the one hand, urban development requires a large amount of lands; on the other hand, the urban environment exceeds its bearing capacity, and human settlements environment have been negatively affected. Taking the typical urban fringe of Xi’an as the research area, this study detected Cd, Cr, Cu, Ni, Pb and Zn combined with GIS, RS and GPS technologies. Totally 26 sample points were collected. The pollution index method (single pollution index, Nemerow comprehensive pollution index method), geo-accumulation index method and potential ecological risk index method were used to evaluate the results, and the pollution sources were analysed. According to the analysis results, Cd, Pb and Zn existed obviously ecological risks. The Pb pollution of each sample point was quite different. Sample points 1-13 were located in the east of the research area, mainly distributed on both sides of the traffic road. Pb pollution was relatively serious. The average value of Igeo (Pb) reached 4.20, which belongs to strong pollution - extremely strong pollution. The heavy metal pollution of Zn was universal, however, the toxicity response parameter of Zn is low, Tr
i=1, so the ecological risk was not significant. The detection rate of Cd was only 11.5%, but the value was much higher than background value, which should be paid attention to. The results showed that there are different degrees of heavy metal pollution and potential ecological risks in the research area, which supported the safe use of land in urban fringe areas.
Research on The Evaluation of Sports Events Based on The Concept of Green Environmental Protection
Authors: Zhang Liying
Published: February 2021

For the sustainable development of sports, it must restore its original appearance, find its original form, and protect and continue it. At present, the concept of green sports has been recognized and accepted by more and more people, and technology is an essential factor affecting the development of sports and the key to achieving green development of sports. The thesis uses the literature data and system analysis method to define, sort out, and theoretically analyze the two key points of “green design” and “sustainable development” of sports events from a scientific perspective. “Environmental protection” sports events are conducive to protecting natural resources, improving energy utilization, saving water, and improving the environment.
Application of Key Techniques for Comprehensive Control of Residual Film Pollution in Xinjiang Cotton Field Irrigation Area
Authors: Zhang Li , Zhou Xin , Liu Xuanfeng , Zhang Haichun , Jiang Yong Xin
Published: February 2021

In order to meet the requirements of mechanical recovery of residual film before tillage in Xinjiang cotton field irrigation area, a combined machine for cotton straw returning and residual film recovery with the function of secondary throwing was independently developed, and the field test of scavenging rate and mulching film hybrid rate was carried out to determine the optimized performance of the machine and tools. Moreover, the comprehensive prevention and control technology model of mulching film pollution was established in Xinjiang cotton field irrigation area. In the end, the system and application basic theory of mechanization recovery technology for residual film before tillage in Xinjiang were created, so as to contribute to the “White Pollution” control in Xinjiang.
Colorimetric detection of nitrogen, phosphorus, and potassium contents and integration into field irrigation decision technology
Authors: Liu Na , Wei Zhengying , Wei Haoran
Published: February 2021

In order to precisely provide nitrogen, potassium, and phosphorus via irrigation, this study designed a method for their field detection based on photoelectric colorimetry. We determined the maximum UV-vis absorption wavelengths of nitrogen, phosphorus, and potassium solutions mixed with colorimetric reagents and experimentally determined their standard curves. The detection error was less than 5% by error analysis, and thus the method can be used to determine the concentrations of the target elements on site. We also combined the detection of potassium, nitrogen, and phosphorus with intelligent irrigation decision-making to achieve automatic irrigation. The accurate technology that we developed for controlling water-soluble fertilizers can detect the target elements on-site, which improves the controlled performance of accurate irrigation systems through fast and efficient on-site detection.
Research on Automatic Technology of New Urban Sewage Inspection and Treatment
Authors: Hu Zhihao , Tan Yiliu , Li Cuimei
Published: February 2021

The automatic control technology is more and more widely used in sewage treatment systems. The thesis elaborated on the new urban sewage treatment technology and control process, analyzed the PLC-based sewage treatment control system structure, realized the control of power equipment and testing equipment, and finally completed the remote monitoring of the SBR sewage treatment based on MCGS. Simultaneously, the paper uses big data analysis and statistical methods to analyse and compare the routine monitoring and important monitoring data of sewage treatment, effectively saving monitoring, feedback, improvement, and release time. The actual operation results show that the system is stable and reliable and can remotely monitor and control equipment operation in real-time.
PEM electrolyzer using Sb-SnO2 anode for electrolyte free electrochemical oxidation
Authors: Sun Haoran , Hu Cun , He Kanghao , Cai Jinguang , Song Jiangfeng , Luo Deli
Published: February 2021

This study uses solvothermal method to fabricate PEM electrolyzer compatible Sb-SnO2 anode catalyst with particle morphology, then load the catalyst with different arrangement of MEA, including CCG and CCM. Characterization of catalyst has been conducted using SEM, XRD and XPS. Performance of different MEA arrangement has been investigated through LSV, CV and EIS. Electrochemical oxidation of reactive blue 4 has been conducted on both arrangements. Moreover, MEA with tiny amount of Pt/C as cathodic catalyst or IrO2 as anodic catalyst has been test to determine the bottleneck of electrolyzer. Results suggested promising EO performance can be achieved through electrolyte free electrochemical oxidation, further improvement should focus on anode catalyst.
Advances of the migration of soil nutrient driven by interflow
Authors: Wang Cunhu
Published: February 2021

Interflow is an important way and carrier of soil nutrient loss under rainfall erosion. At present, there are many domestic and foreign research results on the influence of surface runoff on soil nutrient loss, but the research on the effect of interflow on soil nutrient loss is still in the exploratory stage. This paper reviews the research work in the field of nutrient loss at home and abroad, focusing on the progress made in interflow on the loss of soluble organic carbon, nitrogen and phosphorus, and analyzing the existing problems and shortcomings. It is suggested that the study on the impact of soil flow on soil nutrient migration should be strengthened in the future, so as to provide basic data for ecological construction of soil and water conservation and prevention and control of agricultural non-point source pollution.
Sweet potato agribusiness development strategy to improve farmers’ income
Authors: Dermoredjo S K , Azis M , Saputra Y H , Susilowati G , Sayaka B
Published: February 2021

Sustainable agricultural commodity production is determined by the conducive policy implemented by both central and local governments as well as the stakeholders. To meet domestic and export demands it is necessary to conduct agribusiness development strategy for farmers’ income improvement, i.e. investment climate upgrading. Enhancing export opportunity of sweet potato products has large opportunity, but domestic production is still limited. This paper aims to analyze agribusiness strategy for export purpose. Specific purposes of this paper are: (i) to analyze sweet potato domestic production, (ii) to evaluate sweet potato processing and marketing, and (iii) to assess partnership between sweet potato farmers and processors. The study was conducted in East Java. The research results show that sweet potato production expansion is due to export-oriented partnership resulting in farmers’ income enhancement. It is urgent to increase sweet potato production based on good agricultural practices (GAP) to meet export market demand in terms of quantity and quality.
Kinetics analysis of the effect of types and concentrations of ripening agents on the physical quality changes of banana fruit (Musa acuminata Colla)
Authors: Khairuddin A , Bintoro N
Published: February 2021

Nowadays there are many fruit ripening agents available in the market, thus, it is important to know the performance of those ripening agents in applications. This research determined the effect of the type of ripening agents and applied concentrations on the physical changed of banana during ripening process. Ethylene, acetylene, and ethephon in three different concentrations of 0, 250, and 500 ppm were investigated in a 3×3 factorial with three replications. Green mature bananas were treated with those ripening agents in closed boxes, after being treated then stored in the open ambient room until they were ripened. Weight loss, soluble solid content, and firmness of the samples were monitored every 12 hours until the samples were ripened. Results indicated that in the three ripening agents, the changes of weight loss, soluble solid content, and firmness followed zero, first, and second order kinetics equations, respectively. In general, the values of constant rate of change for weight loss and firmness increased with the concentration but not for soluble solid content. Statistical analysis indicated that the type of ripening agent significantly affected the k values of weight loss, soluble solid content, and firmness.
Physical characteristics of compound chocolate made with various flavouring agents produced using melanger as a small scale chocolate processing device
Authors: Kusumadevi Z , Saputro A D , Dewi A K , Irmandharu F , Oetama T , Setiowati A D , Rahayoe S , Bintoro N
Published: February 2021

Chocolate bars usually use cocoa with or without milk as the ingredients. Innovative chocolate was developed in this study by replacing all cocoa solids with three different powders, namely ginger powder, coffee powder, and fruit flavored powder drinks which was combined with the use of cocoa butter substitute to increase the melting point of chocolate. An alternative processing for chocolate (using a melanger) was used in this study. The evaluated physical characteristics of chocolate were moisture content, color, hardness, melting point and particle size. The results showed that the replacement of all cocoa with or without milk solids with three different powders affected the value of moisture content, color, hardness, melting point, and particle size. Moisture content (0.74-1.3%), particle size (50-65 µm), and the color attributes were directly affected by the original color of the ingredients. The use of CBS as a substitute for cocoa butter increased the melting point of chocolate to 38-39 °C and the hardness of chocolate to 19-24 N/mm2.
Physical properties of red velvet compound chocolates sweetened with stevia and inulin as alternative sweeteners
Authors: Dewi A K , Saputro A D , Kusumadevi Z , Irmandharu F , Oetama T , Setiowati A D , Rahayoe S , Karyadi J N W
Published: February 2021

Chocolate is one of food products made from cocoa beans (Theobroma cacao L). The ingredients of chocolate in general are cocoa butter, sugar, and cocoa powder/cocoa mass. However, in this study, cocoa butter substitute (CBS) instead of cocoa butter was used to increase the value of melting point. In addition, stevia and inulin were used to reduce the calorie of chocolate and red velvet was added as flavoring agent. The purpose of this study was to examine the physical properties of red velvet chocolate sweetened with stevia and inulin. The proportion of stevia used were 15%, 30%, and 45%. The physical properties measured were water content, particle size, color (L*, a*, b*), hardness, and melting point. The result showed that the proportion of stevia significantly affected the characteristics of red velvet compound chocolate. The highest proportion of stevia produced chocolate with the lowest moisture content. Chocolate sample had moisture content in the range of 0.93-1.5%. Particle size was inversely proportional to the water content, ranging from 75.01 to 86.64 µm. Color of chocolates was affected by color of the ingredients. The hardness and melting point of red velvet chocolates were influenced by the proportion of stevia.
Physical characteristics of chocolate made from cocoa bean fermented at different duration: a preliminary study
Authors: Saputro A D , Muhammad D R A , Sunarharum W B , Kusumadevi Z , Irmandharu F
Published: February 2021

Dark chocolate is one of the most popular chocolates due to its health benefit offered. One of the factors influencing its health effect is the fermentation process prior to the chocolate making. Fermentation change the cocoa bean chemical compound and affected the flavor and antioxidant content. Aside from that, changes in the inner structure of cocoa nib may also occur, resulting in different characteristics of cocoa solids. The aim of this study was to do a preliminary study on the impact of fermentation level (unfermented, half-fermented, and fermented cocoa bean) on the quality attributes of dark chocolate, namely color, glossiness, melting point and particle size. The results showed that fermentation duration influenced the characteristics of chocolate, to some extent. The color of chocolate made from fermented bean exhibited higher L*, C*, h° values than chocolate made from half-fermented and unfermented cocoa bean, consecutively. On the other hand, melting point of chocolate made from unfermented cocoa bean had higher propensity than that of chocolate made from half-fermented and fermented bean. Glossiness and particle size of the chocolates were comparable.