bluuebunny/crossref_metadata_2025 huggingface dataset:
Study on Production Decline Law of Multilateral Horizontal Well in Coalbed Methane Reservoirs
Authors: Huang Dan , Yang Jing , Yu Haojie , Li Wuke
Published: August 2019

China is rich in coal-bed gas resources, however, because of the low abundance of coalbed methane, the low filtration ability of coal matrix and the complexity of gas streaming process, causing the single well productivity of conventional coalbed methane well is low. To improve the individual well producing rate and the economic effects of coal-bed gas reservoirs, the multilateral horizontal wells are being popularized on a large scale. Therefore, it is necessary to study the production decline law of multi-branch horizontal well in coalbed methane reservoirs. Based on the seepage physical model, a mathematical model based on resolution-diffusion-filtration was established. By using the point source function, the bottom pressure response function of single branch horizontal well was solved. By utilizing the theory of pressure superposition, mathematical model of production decline was gained, and the key elements influencing production decline were analyzed. The research results in this paper will have some guiding significance for efficient development of coalbed methane.
Research of the remaining oil displacement in Chang 8 low permeability reservoir in Fanxue area of Ordos Basin
Authors: Wang Yanglong , Yan Qibin , Yan Jiao , Deng Qiang
Published: August 2019

In Fanxue area of Ordos Basin, Chang 8 Oil Group has been in the development stage, the current development of more difficult and costly. In this paper, Chang 8 layers in this area are studied by using reservoir sedimentology, logging geology, petroleum geology, petrophysics, 3D reservoir modeling and numerical simulation and laboratory analysis techniques. The reservoir distribution pattern, remaining oil distribution pattern and well pattern optimization provide relevant technical results for the later development and provide guarantee for increasing reserves and production.
Research on the Development of Geographic Information Acquisition Technology and Its Application in Power Grid
Authors: Xie Jinghai , Yuan Jingzhong , Jia Yike , Sun Mi , Guo Jia , Lu Shihua , Su Dongyu
Published: August 2019

The development of three-dimensional information technology has effectively promoted the entire life cycle management process of buildings. Power engineering is complicated to operate and has a large number of equipment. It takes a lot of time and manpower to rely on the traditional power grid system. Based on the 3D geographic information platform, this paper analyzes the development of grid data acquisition technology, focuses on the technical principles of aerial photogrammetry and GIS spatial data, and provides basic support services for improving data processing efficiency and operation quality.
Research on Application Technology of Iron Tailings in Artificial Sand
Authors: Cui Zhengxu
Published: August 2019

Iron tailings are the solid waste discharged by the concentration plant after useful components is selected from the ore, which is an important source of environmental pollution in mining development. Iron tailings not only needs to occupy a lot of land and cause great harm to the surrounding ecological environment, but also needs to treatment and maintenance costs. The comprehensive recovery and utilization of iron tailings resources can not only make full use of mineral resources, expand the utilization scope of mineral resources, as well as extending the service life of the mine, it is also an important means of pollution control and ecological protection, can also save a lot of land and capital, solve the employment problem, benefit the human society, and realize the effective unification of resource benefit, economic benefit, social benefit and environmental benefit, after many years of research, iron tailings can be used in artificial sand making. This paper analyses the current status condition of iron tailings and attempts to provide some useful suggestions and countermeasures for the utilization of iron tailings.
Characteristics of Soil Texture Changes of Soft Rock and Sand Compound Soil with Different Planting Years
Authors: Zhang Haiou , Zhang Lu , Xu Yan , Wang Zhao , Lu Yangjie
Published: August 2019

As a new type of compound soil of soft rock and sand in Mu Us Sandy Land, Whether the texture state can maintain stable development is the primary concern. In this paper, the Mastersizer 2000 laser particle size analyzer method was used to analyze the variation characteristics of particle composition of mixed soil with different volume mixing ratios (1:1, 1:2, 1:5) in field tests from 2010 to 2016.The results show: With the increase of planting years, the content of clay and silt increases, the content of sand decreases, and the texture of the compound soilpresents a benign development trend.with the ratio of 1:1, 1:2 and 1:5 of soft rock and sand compound soil, and the C/F value of the compound soil tends to decrease, and the tillage layer tends to refine, which improves the stability of the compound soil.Therefore, the compounded soil can maintain a good and stable state of development during the utilization period, and it does not need to be compounded after many years.
Numerical Simulation Study on The Degree of Submarine Cable Protection by Riprap Protection Layer Against Anchor
Authors: Cheng Zhiyuan , Zhang Zhonggui , Nie Qiong
Published: August 2019

Based on the discrete element theory, the rockfill-anchor-cable discrete element model was built on the PFC3D simulation platform. Combined with the engineering practice, numerical simulation of the penetration process of anchor into the submarine cable riprap protection layer was carried out, the relationship between force and displacement and the sidewall pressure of the submarine cable under the anchor partial penetration were obtained, and the anti-anchor damage ability of the submarine cable was evaluated quantitatively. The results show that the resistance force of the riprap to the anchor increases gradually with the increase of anchor invasive displacement, and eventually stabilize, which reflects the forming, developing, rupturing and restructuring process of the physical chain of the ripped-rock. Furthermore, the riprap protection layer has a significant protective effect on the submarine cable.
Cassiterite Recovery from Tungsten Residues Through Centrifugal Gravity Concentration
Authors: Yang Junyan , Song Bo , Wang Lijun
Published: August 2019

Tungsten residues contain abundant valuable minerals that are difficult to be recovered by traditional gravity and flotation process.This study presents a route, centrifugal concentration for cassiterite recovery from tungsten residues through centrifugal concentrator. There were separated to three size fractions by experiment of elutriation using rotary flow analyser and cassiterite was observed by polarizing microscope and X-ray diffraction analysis. Results showed that after closed-circuit experiment of centrifugal concentration in the condition of roughing rotate speed of 850rpm, pulp mass concentration of 15%, washing water flow rate of 2L/S and concentrating rotate speed of 550rpm, the grade and recovery of Sn were 18.63% and 82.17% respectively. After closed-circuit experiment, Sn recovery of size fraction was calculated. Sn recovery of size fraction was 97.93% in size fraction of -37+20um, 82.94% in size fraction of -20+10um and 66.49% in size fraction of -10um. This study demonstrates that the centrifugal concentration provides a promising process for the recovery of cassiterite from tungsten residues.
Joint Tomography with Seismic First-break And Reflection under Rugged Topographical Conditions
Authors: Guo Tianzhi , Xu Chun , Song Liang
Published: August 2019

Seismic travel-time tomography is one of method which can inverse some information of underground medium such as structure, velocity distribution and so on. In order to solve the problem about seismic tomography under rugged topographical conditions. The author develops a new way for seismic tomography by combine LTI method based on hybrid meshes which has high fitting degree for the variable structure underground with LSQR algorithm. Thus, the joint tomography with seismic first-break and reflection under rugged topographical conditions has been achieved. The stability and effectiveness is verified by theoretical model test.
Similarity Test of Rainfall Infiltration Model for Tailings Dam Slope
Authors: Xin Baoquan , Wan Lu , Dang Wenyi , Lu Wei , Zhang Xiangjian
Published: August 2019

In order to explore the rainfall infiltration mechanism of tailings dam and its influence on dam properties, experiments were carried out by self-made tailings dam sand trough model and rainfall simulation system. The dynamic characteristics of infiltration rate with different rainfall intensity were obtained. The results show that in the process of rainfall infiltration, saturation is the first place under the dam. But the final water content remained stable and the difference was small. For the same rainfall intensity, the rainfall infiltration process of tailings dam can be divided into three stages. The water accumulation point is 0.59 mm/min and the saturation point is 0.23 mm/min. Different rainfall intensities have the same trend in the infiltration process. Finally, it tends to saturate permeability coefficient Ks. The infiltration rates of the three rainfall intensities decreased by 81%, 60% and 21% respectively at the two boundary points.
Orogenic Gold Metallogenic System in North Margin of Yangtze Block: Preliminary Study on Tectonic Evolution and Mineralization
Authors: Wang Yizhong , Wang Dequan , Wang Jianguo , Deng Shengbo
Published: August 2019

The northern margin of the Yangtze massif is mainly composed of Longmenshan orogenic belt, Hannan-Micangshan uplift and Beidabashan arcuate tectonic belt. The strata are composed of sedimentary caprock and basement. The basement is Archaean-Lower Proterozoic and Mesoproterzoic volcanic rocks. Continental collision between North China plate and Yangtze plate, the three secondary tectonic units have very high similarities in geological structure, geological evolution, mineralization and deposit characteristics. Therefore, we believe that the northern margin of the Yangtze block can be classified as a metallogenic belt. The orogenic gold metallogenic belt on the northern margin of the Yangtze massif has geological conditions for forming large-scale gold deposits. However, the formation time of the gold deposit is younger, lower crustal uplift, and the degree of erosion of the sedimentary caprock is weak. The deep ore-rich body has not exposed the surface. It is suggested to carry out systematic comprehensive aeromagnetic, voyage weight, avionics and other geophysical exploration work in the gold mineralization belt on the northern margin of the Yangtze block. Finally, a favorable target area is delineated.
Study on Hyperspectral Characteristics and Content Estimation of Soil Iron Oxide
Authors: Liu Jinbao , Sun Zenghui
Published: August 2019

The iron oxide in the soil comes from the re-deposition of the weathering products of the parent material. It can be divided into free iron oxide (Fed) and amorphous iron oxide (FeO) according to chemical methods. The content of iron oxide in soil can be used as the soil type in soil system classification. Diagnostic indicators are considered to be a function of soil development and development. Although the traditional method for measuring iron oxide in soil has high precision, it is time-consuming and laborious, and it is impossible to obtain real-time monitoring data of soil physical and chemical properties in time. Hyperspectral remote sensing technology can quickly obtain the spectral information of soil by using hyperspectral instrument, combine the chemical data measured indoors with the physical model to establish the relationship between soil properties, realize the quantitative estimation of soil information, and have the tradition of rapid and current situation. The unparalleled advantages of soil iron oxide measurement methods provide broad application prospects for understanding soil iron oxide spectral information and its content prediction.
The Vertical Distribution Characteristics of Carbon to Nitrogen Ratio in Soft Rock and Sand Compound Soil
Authors: Guo Zhen , Wang Yike , Cao Tingting , Wang Huanyuan
Published: August 2019

This study takes the soft rock and sand compound ratio communities located in Fuping, Shaanxi Province as the research object. Four treatments of soft rock and sand volume ratios of 0:1 (CK), 1:5 (C1), 1:2 (C2) and 1:1 (C3) were selected to analyze the relationship between carbon-nitrogen ratio (C/N) of compound soil and the soil nutrient and texture. The soil organic carbon and total nitrogen content decreased with the increase of soil depth under different treatments. The average organic carbon content ranged from 1.45-2.70 g·kg-1 and the organic carbon content of 0-10 cm soil layer was significantly higher than 20-30 cm soil layer, compounding ratio had a significant effect on organic carbon. With the increase of volume fraction of soft rock, the organic carbon content of 0-10 cm soil layer was the highest in C3 treatment. The average value of total nitrogen was between 0.28-1.31 g·kg-1, and the total nitrogen content of 0-10 cm soil layer was significantly higher than that of 10-20 cm and 20-30 cm soil layer. In the 0-10 cm soil layer, the total nitrogen content of C3 treatment was significantly higher than other treatments, and the compound ratio and soil layer had significant effects on total nitrogen. The average value of C/N was between 1.72-5.92, which was the lowest at 0-10 cm, and the value decreased with the increase of the volume fraction of soft rock, and the treatment with C3 was the most significant. When the ratio of soft rock to sand was 1:1, it can promote the accumulation of carbon and nitrogen in the surface soil of 0-10 cm and enhance the decomposition of microorganisms.
Study on Preparation and Shielding Effect of Lead-Zinc Tailings Sand Mortar
Authors: Chen Zhenfu , Xiao Lifang , Tao Qiuwang , Xie Liping
Published: August 2019

In order to study the shielding performance of lead-zinc tailings mortar, a lead-zinc tailings mortar with different contents of tailings sand (0%, 20%, 40%, 60%, 80%, 100%) was prepared. The mass attenuation coefficient in the energy range of 1keV-100GeV is calculated by XCOM theory. The test results show that with the increase of tailings sand content, the mass attenuation coefficient of mortar increases gradually, and the shielding performance is better. The simulated value and experimental value have Good consistency; the mortar strength prepared with lead-zinc tailings will decrease with the increase of tailings sand content, and the amplitude is larger.
The Application of CFG Pile Composite Foundation in the Reconstruction of the Dujiangyan
Authors: Chen Jia , Chen Wei , Zhang Ke , Li Lin
Published: August 2019

There are many shallow treatment methods for soft foundation, CFG pile composite foundation is one of the common treatment methods. In this paper, the application of CFG pile in multi-storey residential building is introduced, it is pointed out that CFG pile composite foundation is a simple, rapid, economical and effective foundation treatment method.
Analysis of high wind resistant stability of South Anchorage caisson of Oujiang River North Estuary Bridge in Wenzhou
Authors: Chen Peishuai , Qin Zonghua , Rao Weisheng , Li Dejie
Published: August 2019

The South Anchorage caisson of Oujiang Beikou Bridge in Wenzhou adopts the scheme of “four successive heights and four subsidences”, which will be attacked by typhoon during the period of caisson heightening. In order to ensure the caisson passes through typhoon season smoothly, the anti-wind stability of the caisson secondary connecting section under different wind speed and different action angle is checked. The results show that the maximum displacement of the structure increases sharply with the increase of wind speed, and the effect of load direction on the maximum displacement of the structure is less than the influence of wind speed. The relevant conclusions can provide guidance for the safe passage of the high section of Caisson in typhoon season.
Water Use Disparity in China-An Overview and Revision
Authors: Long Qiubo
Published: August 2019

The accuracy of water use statistics has attracted more attention especially after the publication of “Three Red Lines” policy in China. Based on data from China Water Resources Bulletin (CWRB) and China Census for Water (CCW), the authors analyzed water use disparitiesby integrating multiple approaches and identified causes for disparities in industrial and agricultural water uses. We presenteda set of modified water uses data from 1997 to 2015, which might be more realistic and hopefully will provide more accurate base data for future water resources management.
Simulation Research on Dynamic RCS Characteristics of Cruise Missile
Authors: Wen Baoqian , Wang Tao , Cheng Kun
Published: August 2019

The target radar cross section (RCS) is an important basis for air defense radar detection and tracking. Aiming at the influence of flight attitude change on the target RCS during the actual flight process, a dynamic RCS method based on the target static RCS database and the target motion track is proposed. The dynamic RCS characteristics of the cruise missile under the actual motion track are simulated, which is convenient for the air defense radar to accurately and quickly detect the target, and further provide operational advice for the best timing of the air defense weapon interception target. The simulation results show that the method can quickly and accurately obtain the dynamic RCS characteristics of the air target. The analysis of the simulation results can provide a theoretical reference for the air defense weapon to intercept the enemy’s incoming target.
Evaluation of Environmental Pollution Control Efficiency in Qingdao City And promotion countermeasures research
Authors: Wang Yiyang
Published: August 2019

Analyze the input and output status of various environmental pollution control projects in Qingdao from 2007 to 2015, and then use the super-efficiency DEA and ML index methods to calculate the comprehensive efficiency. The results show that the comprehensive efficiency of environmental pollution control is increasing year by year, but Compared with advanced cities, there is still a big gap; scale efficiency has not been optimal, and scale returns are diminishing; the efficiency of industrial waste gas, industrial waste water, sewage treatment and greening is relatively low, and the efficiency of waste and waste treatment is relatively high. The input or output scale of pollution control projects should be adjusted, the concentration of treatment should be improved, and the system improvement, technology and management level should be promoted.
Water pollution index evaluation of lake based on principal component analysis
Authors: Liu Dalin , Huang Faming , Kang Wenjing , Du Yaoxian , Cao Zhongshan
Published: August 2019

Poyang Lake is the largest freshwater lake in China, with a wide area and abundant species resources. It is a serious issue to protect and monitor the water quality of Poyang lake. This paper proposes to use principal component analysis (PCA) to evaluate the water pollution index of Poyang Lake. The input variables of PCA are the weekly monitoring water pollution factors including dissolved oxygen (DO), chemical oxygen demand (CODMn) and NH4+-N. The water quality monitoring station is in Hukou County of China from 2004 to 2014. Finally, a series of new water pollution indexes are generated by PCA to reflect the change characteristics of lake water pollution. The results can provide support for the comprehensive evaluation of lake water quality. Meanwhile, the results also discuss the variation in water pollution, which is practical and innovative.
Study on Characteristics and Influencing Factors of Air Pollution
Authors: Zhu Yuxin
Published: August 2019

Beijing-Tianjin-Hebei region, the capital economic circle of our country, is a serious polluted area at present. Under the coordinated development of this strategy, it is of great significance to explore the characteristics and influencing factors of air pollution in Beijing-Tianjin-Hebei region. In this paper, the characteristics of Beijing-Tianjin-Hebei air pollution are analysed by descriptive statistics, and the main factors affecting Beijing-Tianjin-Hebei air pollution are obtained by regression analysis based on the characteristics of Beijing-Tianjin-Hebei region.
Analysis of Noise Pollution and Control of 110kV Transformer Substations
Authors: Fan Xiaopeng , Tang Wenyuan , Li Li , He Hongming , Zou Zhuanglei , Ma Cunren
Published: August 2019

An example of noise control for the north gate of Quzhou110kV transformer substation. Based on the survey, measurement of the sound sources, and also result analysis, the acoustic enclosure with natural ventilation is designed by using the space around the main transformer and considering the heat dissipation of the main transformer, and also the maintenance requirement in the future. With dedicated acoustic modeling, the Cadna/A software prediction results show that the main transformer noise radiation to the measuring points of factory boundary near the residential area and residential area in the out of factory boundary decrease more than 12dB after the proposed noise control structure. After the superposition of background noise, the noise level of factory boundary and the sensitive point in the out of factory boundary reach to the 1 class sound functional area standard.
Photocatalytic performance of carbon nitride intercalation compound
Authors: Wan Lijuan
Published: August 2019

The carbon nitride intercalation compound photocatalyst was synthesized by a simple molten salt route. The photocatalyst was characterized by X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM) and Fourier transform infrared (FT-IR) spectroscopy. The photocatalytic oxidation ability of the carbon nitride intercalation compound photocatalyst was evaluated by the photocatalytic activity in photo-oxidation of MO. The as-prepared photocatalyst exhibits an improved photocatalytic activity due to the increased surface area.
Research on Satisfaction of Habitat Natural Environment
Authors: Wang Ying , Wang Runzhou
Published: August 2019

With the continuous development of China’s economy and the deepening of urbanization construction, the public’s requirements for the quality of living environment are getting higher and higher. The good natural environment of human habitat is the necessary prerequisite for the sustainable development of regional social economy. On the one hand, it is also a powerful guarantee for improving public satisfaction and improving the quality of public life. The Beijing-Tianjin-Hebei urban agglomeration is centered on the capital and is an extremely important area for population gathering in China. However, due to many factors such as fragile ecological environment, unreasonable economic structure, imperfect environmental protection and management system, etc. It faces greater pressure for improvement.
Summary of flue gas denitration technology for coal-fired power plants
Authors: Yang Wanpeng
Published: August 2019

With the rapid development of the economy, nitrogen oxide pollution has become a problem that cannot be ignored. Therefore, it is necessary to strengthen the control of nitrogen oxides in coal-fired power plants. This paper introduces the current denitration technology overview, including the selective catalytic reduction (SCR), non-selective catalytic reduction (SCNR), SCR-SNCR mixed denitration technology, including acid absorption, Wet denitration technology such as lye absorption method, oxidation absorption method and activated carbon absorption method, as well as coal-fired flue gas combined desulfurization and denitration technology were introduced. The process principle and characteristics were briefly described, and the development direction of flue gas denitration technology was introduced. The outlook was made.Introduction Nitrogen oxides (NOx) is an atmospheric pollutant that combines with water in the air to promote the formation of acid rain. It also produces photochemical smog under certain conditions with other pollutants. It also participates in the destruction of the ozone layer and oxidation. Nitrogen will destroy the ozone layer in the high-temperature stratosphere and increase the incidence of skin cancer. Therefore, while building a power plant to meet social energy needs, it should strengthen the effective control of nitrogen oxide emissions from coal-fired power plants, reduce air pollution, and reduce the serious damage caused by nitrogen oxides emissions to human living environment. The emission of nitrogen oxides from power plants. Denitration technology is particularly important.
Prediction of summer precipitation change in the middle 21st century (2021-2050) of Qinghai-Tibet Plateau based on the MPI-ESM-MR/RegCM4 Model
Authors: Gong Boy , Huang Ya , Weng Baisha , Fang Dongqing
Published: August 2019

The Regional Climate Model RegCM4.5 driven by the MPI-ESM-MR was used to predict the summer precipitation over the Qinghai-Tibet Plateau in the middle of the 21st century (2021-2050) under the RCP4.5 and RCP8.5 scenarios. Results showed that under the RCP4.5 and RCP8.5 scenarios, the average annual summer precipitation in the southeastern Qinghai-Tibet Plateau and the Qilian Mountains increased significantly, while the western Qinghai-Tibet Plateau decreased significantly, and the interannual variation trend of the summer precipitation was not significant. In the future, the summer precipitation over the Qinghai-Tibet Plateau has significant diurnal variation patterns and spatial differences between east and west regions. Specifically, summer precipitation decreases during daytime, while it increases slightly during night, especially in the eastern Qinghai-Tibet Plateau. At the same time, the increase in the probability of precipitation intensity above 10mm/day in the eastern of the Qinghai-Tibet Plateau means that the probability of extreme precipitation in the future may increase, while the precipitation intensity below 10mm/day is slightly reduced.
Analysis of Wildfire Fault Based on F-FTA Method
Authors: Chen Changkun , Cao Sai , Xu Tong
Published: August 2019

It is particularly necessary to prevent the occurrence of wildfires, which caused a series of economic losses and ecological disasters. In this paper, an evaluation model is established by the combination of Triangular Fuzzy Theory and FTA (F-FTA). Considering the human and environmental errors in the wildfire fault, the triangular fuzzy probability, error limits and importance degree of the events are adopted, and the causes of probability fluctuation and proper measures are raised. In addition, this model is applied in Zhaotong, Yunnan to analysis the potential risk of wildfires. The result shows that the triangular fuzzy probability of local wildfire fault is (0.0024, 0.021, 0.071), and the probability of wildfire occurrence fluctuates greatly. Especially, Sacrificial fire (X18
), Burning Charcoal (X8
), Burning woodland (X9
), Smoking in the wild (X16
), Burning pasture (X10
), Children playing with fire (X20
) exist highly risk. Therefore, fire-fighting equipment should be arranged flexibly, and individualized measures should be formulated in response to the accidental occurrence of wildfires to provide guidance for the prevention and control of wildfires faults.
Mineral CO2 Sequestration by Carbonation of Glauberite
Authors: Rong Kuanwei , Wu Aixiang , Yin Shenghua , Li Hongyan
Published: August 2019

CO2 mineral sequestration has significant advantages such as safety and permanence, but its industrial application is limited by high costs. Combining CO2 mineral sequestration with existing industrial processes can make it economically viable by integrating ore extraction, crushing and grinding, and avoiding the construction of new carbonation plant. In this paper, CO2 mineral sequestration was combined with the leaching of sodium sulfate from glauberite. The dissolution behavior and carbonation process of glauberite ore were studied in detail. The influences of key parameters such as ammonia dosage, CO2 pressure and temperature were also investigated. The results showed that under the optimal conditions (ammonia dosage 110%, CO2 pressure 5 bar, temperature 100°C), the carbonation rate of glauberite can reach 93.4%, while the concentrations of sodium ion and sulfate ion were 25.8g/L and 53.8g/L, respectively. The increase of ammonia dosage and CO2 pressure contributed to the dissolution and carbonation of glauberite. Temperature, however, affected them in two very different ways.
Spatial distribution of Heavy Metal contents in farmland soils by different spatial interpolation methods: A case study of a farmland in Lanping County, Yunnan Province
Authors: Li Shunyou , Zhou Dandan , Jin Xiuqi , Liu Yang
Published: August 2019

The spatial interpolation method is of great sign ificance for the spatial distribution of heavy metals in soil and the prevention and control of pollution. However, different interpolation methods are applied to predict the accuracy of different heavy metal pollution distributions in small-scale areas with a single farmland. There is no relevant argument. Taking a farmland (96000m2) in Lanping County, Yunnan Province, Yunnan Province as the research object, 144 surface soil samples were collected and the contents of Pb and Cd in soil were determined by ICP-MS. The deterministic spatial interpolation method and geostatistical Kriskin interpolation method were used to investigate the accuracy of different interpolation methods and the distribution characteristics of Pb and Cd in soil. The results show that the optimal interpolation methods for heavy metals Pb and Cd in polluted farmland are 0-order ordinary Kristen interpolation method, and the content of Pb and Cd in the soil is relatively accurate. This study will provide important basic information for the identification of spatial distribution characteristics of different heavy metals in small-scale areas with a single farmland, which will help to comprehensively evaluate the function of spatial interpolation to identify spatial distribution information of heavy metals.
Application Status and Development Trend of Information Engineering Technology in Environmental Protection
Authors: Zhang Wenxin
Published: August 2019

With the acceleration of industrialization in China, environmental pollution is becoming more and more serious. Therefore, the environmental protection is imminent. At present, information engineering technology has been developing swiftly and applied to many aspects of social life. To apply information engineering technology to environmental protection has proved to be an inevitable choice to conform to the development trend of the times. This paper will elaborate the internal relationship between information engineering technology and environmental protection, and summarize the application of information engineering technology in environmental protection. In addition, this paper will also state the future development trend of the application of information engineering technology in the field of environmental protection.
Determination of Six Heavy Metal Elements Such as Co in Solid Waste by ICP-MS
Authors: Zhao Wang
Published: August 2019

Soil In this paper, tetraacid system -microwave digestion was established as a soil pretreatment method. The analytical methods for simultaneous determination of six heavy metals in Co, V, Sb, Mn, Mo and Tl by inductively coupled plasma mass spectrometry (ICP-MS) were discussed. The results show that the correlation curves of standard curves for soil and sediment Cr, Ni, Cu, Zn, Cd and Pb were determined by ICP-MS method to be 1.0000, 0.9999, 0.9999, 0.9999, 0.9999, and 0.9999, respectively. The detection limits were 0.1 mg/kg, 0.1mg/kg, 0.1mg/kg, 0.1mg/kg, 0.1mg/kg, and 0.1mg/kg, respectively. The relative standard deviations of precision are 1.2%∼3.7%, 1.4%∼2.9%, 3.7%∼6.6%, 1.1%∼1.3%, 6.1%∼7.6% and 2.7%∼7.1%. The accuracy of the standard substance measured values are within the uncertainty range. The laboratory has verified the method of determining heavy metals in soil waste by ICP-MS. The linear relationship, detection limit, precision and accuracy are in line with the standard HJ 766-2015 requirements.
Prediction of Cooling Load of An Energy Station based on GA-SVR
Authors: Zhao Dazhou , Zhang Weibo , Zhang Zhongping , Yang Fan
Published: August 2019

Taking an energy station as the research object, the external dry bulb temperature and load values at t-1, t-2, t-3 moments were selected as input parameters, and the load value at t moment was used as output parameters to establish the SVR(Support Vector Regress)cooling load prediction model, the key parameters of SVR are optimized by GA(Genetic Algorithm).The results show that the maximum absolute error between the predicted value and the actual value is 4.83 GJ/h, the maximum relative error is 9.2 %, the average absolute error is 1.25 GJ/h, and the average relative error is 2.4 %.
Analysis of the development of new energy electric vehicles based on logistic model
Authors: Ren Cuiping , Dong Yinli , Xue Pan , Xu Wei
Published: August 2019

Recent research indicates that electric vehicles can greatly ease the problem of environmental pollution caused by fossil fuels. Therefore, based on the development of electric vehicle market in the United States, this paper aims at finding an optimal approach for the conversion of fossil fuels to electricity, in elements of environment, economy, etc. Firstly, a station-building model about the amount of charging stations for the future requirements is established. According to the site-selecting principles, we set the station-building cost optimization model to forecast the number of electric vehicle developments in the next decade. Secondly, we build an optimization model and a logistic model to draw a conclusion that after the emergence of the new technology, there are more charging stations than before. Moreover, the proportion of electric vehicles has reached 100% in advance of five years ahead of the original forecast, which speeds up the construction of charging stations. Lastly, we suggest a series of new energy development plans on account of the serious pollution under the domestic environment.
Application of a Weak Signal Processing Method on Cable Non-destructive Testing
Authors: Sun Jie , Zhu Fei , Sun Wen
Published: August 2019

A weak signal processing method is used to distinguish the defect signal while signal-to-noise ratio is small, and the application in cable non-destructive testing so that can find the tiny defects in the cables. For the signal noise obeys the normal distribution in time domain which is symmetrically distributed on both sides of the real value. The signal noise could cancel each other after accumulating. while the real signal does not obey the normal distribution and could be amplified after time accumulating. A weak signal processing method is designed to collect weak signals multiple times under timing control, and accumulate the collected signal sequence strictly according to the time line. The accumulation of weak signals could effectively amplify the real signal without amplifying the noise, so that the weak signal generated by the tiny defects could be clearly distinguished. The application of weak signal processing method could greatly improve the accuracy of cable non-destructive testing.
Research on design scheme of urban public transportation for energy conservation
Authors: Xu Jian , Xiao Wei , Mao Zuguang
Published: August 2019

The transportation system promotes the development of the metropolitan area, while the number of vehicles in the transportation system is increasing, and the speed of energy consumption is also increasing. The consequences are not only the destruction of human living environment, but also many urban problems such as traffic congestion and urban environmental pollution for people living in the metropolitan area. In order to solve these problems, the article proposes a design scheme for urban public transport from the perspective of energy conservation. Through the modular design method, combined with the existing electric vehicle drive technology, the public transport is divided into two modules: the ride module and the drive module; at the same time, the existing traffic information service system is integrated to construct service system of the information guide to support the public transport scheme. The public transport design provides a possible solution to environmental pollution and traffic congestion.
Study on the Influence of the Activation Energy on the Simulation of Char Combustion
Authors: Fang Yuan , Qiao Lei , Wang Cheng , Luo Xiaoyu , Xiong Teng , Tian Rongli , Tang Zhengming , Sun Haijun
Published: August 2019

The numerical simulation of coal char combustion process can quickly obtain the combustion characteristics of char. It has guiding significance for the design and operation industrial boilers. But during the numerical simulation, how to choose the appropriate kinetic parameters is a difficult problem. The values of combustion activation energy in previous literatures were different. This paper focused on the influence of activation energy on the simulation results of char combustion. The activation energies of 20 Chinese typical coals were measured by a two-step in-situ reaction analyzer. CBK (Carbon burnout kinetics) model was used to simulate char combustion process. Results showed that when activation energy varied greatly, the the predicted combustion rate and particle temperature were very different, especially in the later stage of char combustion.
Research on Low Carbon Level Evaluation of Urban Transportation System Based on Grey Comprehensive Evaluation
Authors: Kong Xue , Zhang Heng , Ren Chuanxiang
Published: August 2019

With the rapid development of social economy, the demand for urban transportation is increasing, and the energy consumption and greenhouse gas emission of urban transportation are also increasing year by year. In this situation, energy saving and emission reduction of transportation industry is imperative. This paper studies the evaluation of the low carbon development level of urban transportation system. Based on the research of domestic and foreign literatures and the characteristics of Qingdao, the urban low-carbon traffic evaluation index system is constructed, including transportation infrastructure, transportation services, resources and environment, and transportation policies and regulations. There are 16 evaluation indicators. The entropy weight method is used to determine the weight value of the evaluation index, and then the gray correlation model is used for evaluation. Taking Qingdao as an example, the empirical analysis shows that in recent years, the low-carbon traffic level in Qingdao is constantly changing. At the same time, the correlation degree of each index is analyzed to find out the crux that hinders the development of low-carbon urban transportation.
A Novel Battery Equalization Method Base on Fuzzy Logic Control Considering Thermal Effect
Authors: Xia Bizhong , Zhou Jie , Yang Yadi , Wang Huawen , Wang Wei , Lai Yongzhi
Published: August 2019

In order to avoid battery over-charges and over-discharges and improve the battery pack capacity, a passive equalization controller based on fuzzy logic control (FLC) is proposed to reduce the impact on inconsistency in manufacture and use processes of battery pack. A cell’s state of charge (SOC) difference and its temperature is chosen as the FLC’s input and the balance current is chosen as the FLC’s output. The advantage of this FLC is can reach a larger balancing current and control the batteries temperature at the same time compare with average SOC controller and switch controller. Simulation results show that the equalization strategy based on FLC can achieve battery pack balance in a shorter time in a lower finish temperature. This equalization strategy can provide battery management system (BMS) designer a higher performance control strategy on the basis of the existing hardware platform.
Research on Prediction Technology of UHV Transmission Line in Global Energy Internet
Authors: Li Lingyun , Gan Jingshuang , Guo Xinju , Li Yongjie , Li Xuyang , Zhou Tiejun
Published: August 2019

In response to the global energy crisis, the State Grid Corporation of China has put forward the idea of global energy Internet, which focuses on using ultra-high voltage (UHV) transmission technology for power delivery across continents. Reasonable prediction of UHV transmission line can effectively assist global energy Internet scheme comparison and project decision in the early stage. Based on mathematical model, this paper selects 11 influencing factors to obtain mathematical equation of UHV transmission line. It indicates that the mathematical model obtains good results and the deviation rate between the predicted value and the actual value is less than 10%. The prediction technology of UHV transmission line in global energy Internet can meet the requirements of scheme comparison and project decision in the early stage.
Fluorescent Photonic Crystal (FPC) Films for Higher Dye-Sensitized Solar Cells (DSSCs)
Authors: Ma Pengchang , Dai Chuntao , Liu Hongbao
Published: August 2019

A novel kind of fluorescent photonic crystal (FPC) films were prepared by co-assembly of monodispersed silica colloids and carbon dots (CDs), exhibiting brilliant structural color and excellent fluorescence simultaneously. The fluorescence spectra of FPC films have been showing a peak at 486 nm. By comparison, the dye-sensitized solar cells (DSSCs) with FPC film show higher power conversion efficiency (PCE) (4.28%) than those of DSSCs without PC film (4.08%). A relative efficiency enhancement of 4.9% was achieved, indicating that the carbon-based fluorescent photonic crystal film can be applied to enhance the efficiency of the dye-sensitized solar cell.
Innovative ideas for charging piles based on existing problems for new energy vehicles
Authors: He Xin , Jiao Dannuo , Xu Jinghan , Wang Ling
Published: August 2019

The emergence, development and promotion of new energy vehicles are gaining more and more public scrutiny in terms of science, technology and policy. China’s policy subsidy has alleviated the development crisis to a certain extent, but the energy consumption problem and charging facilities layout still cannot be alleviated. Based on the current situation of charging facilities construction, this paper puts forward suggestions for mobile charging piles and charging vehicles to solve the problems of improper charging and unreasonable distribution, and puts forward reasonable prospects for the future development trend of a shared new energy vehicle economy to help people better use the convenience and environmental protection brought by new energy vehicles.
Urban Electric Vehicle (EV) Charging Point Design Based on User Travel Big Data
Authors: Pan Aiqiang , Tian Mengyao , Tang Bo , Yang Xiu
Published: August 2019

A method was proposed to use big data to mine charging demand information of electric vehicles (EVs) and select location and construction scale of charging point. Firstly, the travel data of EV users were cleaned and analysed to obtain the available rules and corresponding digital characteristics. Secondly, according to Markov chain principle, the roulette wheel method was used to predict the spatial and temporal distribution of charging demand. Then particle swarm algorithm was used to optimize the selection of candidate sites. Finally, a typical region was taken as an example to prove the feasibility of this scheme.
Modeling and Simulation of Non-ideal Buck Converter in CCM
Authors: Xu Huifang , Cheng Ming , Zhang Fan
Published: August 2019

The circuit average equivalent model of non-ideal Buck converters in CCM was established on the basis of energy conservation average method and time averaging equivalent circuit method, which is considering the influence of the every element’s equivalent parasitic parameters and inductance current ripples existing in actual converters, and the influence of the output current oscillation for the circuit performance. Analysis and simulation by Matlab were implemented. It could be seen that the new model is intuitive and has clear physical meaning. Therefore, it can reflect the actual operation of the system more accurately.
Numerical Simulation on Structure Reliability of Electric Field Energy Harvesting Device at Tower Side under Typhoon Weather
Authors: Zhao Dongsheng , Xiao Xiang , Yang Xian , Ma Zhiqin
Published: August 2019

As an unconventional power supply for on-line monitoring equipment, how to arrange the electric field energy harvesting device at the tower side and ensure its structural reliability in typhoon weather is worth further discussion. From the point of view of installation practicability, this paper adopts magnetic suction device, taking into account the T-shaped and circular cross-sections and modeling them. Through fluid-solid mechanical coupling simulation, the force and deformation of the device under different airflow velocities are obtained. The expression of minimum magnet suction which can ensure that the device is adsorbed stably at the side of the tower is deduced and used as the main index to measure the reliability of the structure of the device. Compared with the two kinds of device structures, the structure reliability of T-shaped collector is difficult to meet at higher wind speed, while the cylindrical collector is more reliable even when the wind speed gets high enough.
Air Compressor Energy Efficiency Detection System Design
Authors: Xie Zeqiong , He junfei , Lin Yousheng , Huang Jiayu , Xiao Zhenqian
Published: August 2019

This paper develops an air compressor energy efficiency detection system, including the detection terminal hardware system and the detection terminal software system. The detection terminal hardware system includes a communication interface module and a data acquisition and processing module. The detection terminal software system includes an A/D acquisition program and a communication protocol program. The system can provide technical support for mastering the operating efficiency of the air compressor, and provides an important basis for formulating energy saving measures for air compressors and reducing the power consumption of air compressors.
Analysis of the Overall Transmittance of Self-cleaning Photovoltaic Glazing
Authors: Cui Jiachen , Lv Qinghua , Jarimi Hasila , Lv Hui , Yuan Chenben , Dong Shijie , Su Yuehong , Riffat Saffa
Published: August 2019

This paper provides a simple calculation method of multilayer glazing system based on transfer matrix method. A new self-cleaning photovoltaics (PV) modules technology is analyzed, which transmittance of self-cleaning PV glazing, the theoretical result was then validated against the transmittance experiment of the PV modules using a Spectrophotometer. The result shows that the average visible light transmittance of self-cleaning PV glazing is about 13%, the average infrared light transmittance of self-cleaning PV glazing is about 29%, and the overall average transmittance of self-cleaning PV glazing is about 21%.
Adaptive Dynamic Grid Partitioning for Reactive-Power/Voltage Control Based on Secondary Voltage Control
Authors: Li Tie , Liang Xiaohe , Jiang Feng , Feng Zhanwen , Zhang Kai , Cai Zhuang , Gong Xiaowei , Bai Xue , Li Mingzhu
Published: August 2019

Reactive power voltage partition control is an important part of AVC secondary voltage control. Aiming at the current status of secondary voltage control, based on the voltage/reactive sensitivity and modularity function, an adaptive dynamic partitioning method is proposed, which changes with the operating conditions of the grid. With each reactive power source partition center, the load nodes are mapped to the corresponding reactive power sources according to the voltage/reactive sensitivity, and the regional merging automatically forms the optimal partition by using the modularity function as a measure. Finally, the proposed method is verified by the IEEE-39 system.