bluuebunny/crossref_metadata_2025_split huggingface dataset:
Design of Position Servo Control System Based on MATLAB
Authors: Ren Shiyong , Miao Hailin , Jin An 
Published: September 2019

Abstract
The position servo system is a feedback control system, and its output variable varies with the input variable, to achieve accurate tracking for the position command by the actuator. The controlled variable (output variable) of the position servo system is the linear displacement and angular displacement of the position of load space. When the given variable (input variable) of the position servo system is arbitrarily changed, the main task of the system is to make the output reproduce a given amount of change quickly and accurately. MATLAB software is widely used in academic and many practical fields. After the system is designed perfectly, we need to use MATLAB software to simulate the results. MATLAB software can well reflect the characteristics of the three-loop position servo system. The system designed in this time belongs to the analog servo system, and its selected model is a high-power three-loop position servo control system.
Study and application of lunar rover tracking measurement technology with laser radar and iGPS
Authors: Chen Qiwei , Tang Laiying , Yang Zaihua , Wang Linzheng , Feng Wei , Zheng Shengyu , Yi Wangmin 
Published: September 2019

Abstract
The topographical data of movement environment and the real-time position and orientation of lunar rover must be accurately measured to test lunar rover’s ability of localization, path planning and mobile control. These data will be used to track the lunar rover’s movement in simulated lunar terrain in real time. Lunar rover tracking measurement technology with laser radar and iGPS is discussed in this paper, and a tracking measurement system is designed to measure and track accurately real-time position and orientation of lunar rover in the topographical data of movement environment. This system can provide some reference for the research of large-scale, high-precision and high-frequency tracking measurement of other rigid objects in specific environmental terrain.
Research on error Analysis of LED chips visual positioning system
Authors: Gong Shihua , Zhou Diyi , Wang Ziyue , Li Delong , Lu Huaiqing 
Published: September 2019

Abstract
With the continuous development of intelligent equipment, the chip positioning accuracy requirements are also constantly improving. In this paper, a mathematical model of the LED chips positioning system based on the characteristics of the system is constructed. And then, an error analysis method based on Monte Carlo is proposed, which is able to obtain the impact factors of various sources of error, such as calibration error, image processing error and motion control error. By analyzing the influence factors of these error sources, we can know that calibration error is the main source of error affecting positioning accuracy.
Error Analysis and Experimental Research on 3D Printing
Authors: Zeng Lianghua , Zou Xinfeng 
Published: September 2019

Abstract
Precision is one of the important factors that restrict the application of 3D printing technology on industry. On the basis of Fused Deposition Modeling (FDM) of 3D printing experiments, this paper summarized the problems occurred during experiments, discussed the types of errors of 3D printing, and analyzed the errors by combing theoretical calculation and experiment.
Application of High-resolution Satellite Imagery in Water Quality Monitoring of Rivers and Lakes
Authors: Song Jian , Wang Jiabin 
Published: September 2019

Abstract
The traditional water quality monitoring needs a lot of manpower and financial resources, but with the advantage of high time efficiency and other advantages of high-score data for information extraction, analysis and monitoring can be timely, large-scale monitoring of specific water, make up for the shortcoming of traditional water quality environmental monitoring. This paper introduces the theoretical method and technical process of monitoring surface water body with high score data. First, the original remote sensing data are preprocessed by radiometric calibration, geometric correction, atmospheric correction and water extraction, and then an inversion model is established to invert the chlorophyll a concentration, and then the main monitoring indicators are established, such as suspended matter, transparency and eutrophication index.
PV value-added service pricing model of stand-alone Stackelberg game
Authors: Li Wenfeng , Bai Hongkun , Hua Yuanpeng , Bu Feifei , Han Ding , Yang Meng , Yin Shuo , Wang Yuanyuan , Jia Chuyun 
Published: September 2019

Abstract
With the development of new energy technology, the new-type energy still occupy increasingly larger proportion of the future energy structure, and the development prospect is bright. Under the policy background of further opening the sales side, the concept of PV value-added service is proposed to enhance customer stickiness and gain potential customer of power grid enterprises. In this paper, the pricing model of double photovoltaic value-added service system including three main game participants about the photovoltaic seller, grid company and photovoltaic value-added service consumers as the research subjects, Stackelberg game method is established, put forward the best benefits the pricing method of photovoltaic value-added services. At the same time, the actual situation of the Henan photovoltaic park is studied and analyzed. This paper establishes the Stackelberg double-deck game pricing model of ‘spontaneous self-use and residual electricity network’ in the region, and determines the optimal pricing in this mode. Finally, two economic evaluation indexes are used to evaluate and summarize the economic benefits of ‘spontaneous self-use and residual electricity network’ service mode.
An analysis research of terrain correction methods considering the slope ranges based on OLI image
Authors: Zhang Ying , Wang Lin , Ai Yunfei , Bai Xuejiao 
Published: September 2019

Abstract
In mountainous terrain, the topographic correction often be used in image pre-processing. Recently, some correction approaches considering slope ranges have been developed to improve topographical effects. The paper explores the C correction and Minnaert methods considering the slope ranges to evaluate if the methods considering slope ranges can effectively reduce the topographic effects. The C model constants and Minnaert constants in different slope range were obtained based on the image samples. Then, the scatterplots were used to evaluate the correction results. The model constants analysis shows that the Minnaert constant has a nonlinear relation with slope. The scatterplots analysis shows that the image reflectance using a single correction constant value has a better correction result. When the slopes are greater than 43 degrees, the Minnaert model considering slope has overcorrected the topographic effects. The study has demonstra-ted the Minnaert correction models considering slope range did not better reduce topographic effects and the method need be improved, especially in the high slope ranges.
Identification on the burned forest area of Qipan Mountain using GF1-WFVsatellite image
Authors: Yu W Y , Ji R P , Feng R , Wu J W , Zhang Y S 
Published: September 2019

Abstract
In this study, GF1-WFV image was used with a spatial resolution of 16 m, which is higher than that of the commonly used MODIS, TM and other medium-high resolution satellites. Combined with the information extraction of pre-disaster forest and the ratio of NDVI in the two-temporal image before and after fire occurrence, the burned area, and its range after the “4.17” fire in Qipan Mountain in 2019 was analyzed. The results showed among the vegetable indices NDVI and EVI were better than GEMI and BAI in the extraction of burned forest area, while the radio of NDVI in two two-temporal was better than that of EVI. By using NDVI to extract forestland information before the fire occurrence and combining with NDVI ratio, it was most suitable to identify the burned area after a large range of forest fire in this area, with an overall accuracy of 92.2%.
Study on Residential Fire Load in the Yangtze River Delta
Authors: Wang Yueqiang , Zhou Jin 
Published: September 2019

Abstract
Fire load survey is an important step in residential fire risk assessment. There are certain differences in residential fire loads in different regions. In order to improve the basic fire data in the Yangtze River Delta, we mainly investigated the residential fire loads in Zhejiang Province. In this survey, the residential fire loads were divided into 7 categories according to the characteristics of combustibles in the room. The measurements include mass method, single item method, size method and area method, etc. The survey data were analyzed by SPSS and residential fire loads were obtained as: 355.75MJ/m2 for living room, 612.28MJ/m2 for bedroom, 658.64MJ/m2 for kitchen, 542.66MJ/m2 for study and 219.64MJ/m2 for bathroom. The statistical analysis shows that the distribution characteristics of residential fire loads are closely related to room use. The fire loads of bedroom and kitchen are basically normal distribution and other rooms are not obvious.
Low-carbon Technology Application in Wuhan Based on Ground Source Heat Pump System
Authors: Li Hongmin , Zou Zuxu 
Published: September 2019

Abstract
It is known that ground source heat pump system (GSHPS) takes the advantage of shallow geothermal energy which include the power of underground water, surface water or soil etc., and the system can not only provide heat apply but also provide cold making power in a high efficiency and energy saving way. The ground source heat pump only uses the shallow geothermal resources of the earth’s surface (usually less than 400 meters deep) as cold and heat source, it takes less effect on earth and its environment. The GSHPS could replace air-conditioner heater and domestic hot water facilities. The running process of GSHPS is green without any pollution. It can be built in a residential area, no burning, no smoke, no waste, no stacking fuel waste sites, and no long-distance transport of heat. The system does not consume water or pollute water, no boiler, no cooling towers, does not need stacked fuel waste sites. It leads significant environmental benefits. With the experimental application in the project in Wuhan, it showed the advantages of GSHPS, the using feasibility of GSHPS and also the disadvantages and limitations of GSHPS. And with the developing of the GSHPS technology, the use of the system can have a considerable prospect.
Measurement and Analysis of Winter Microclimate of Waterfront Settlements in Severe Cold Region
Authors: Zhang Yongyi , Xu Jiejing 
Published: September 2019

Abstract
To study the characteristics of winter microclimate environment of waterfront settlements in severe cold region, relative humidity, wind speed and air temperature of waterfront settlements in Daqing were measured during typical weather day in winter. The outdoor microclimate environment of each site was quantitatively analyzed, and the outdoor microclimate environment of waterfront settlements evaluated by calculating the wind chill temperature (WCT) of each section. The results showed that solar radiation and air temperature have significant influence on the relative humidity in waterfront settlements. The flexible layout of buildings could reduce the adverse effects of wind of severe cold regions in waterfront settlements. Total solar radiation and wind speed led to the difference in air temperature in different areas. The cold degree between the building gable walls was the highest, and the thermal comfort was the worst. The cold degree of enclosed building layout was the lowest, and the thermal comfort was the best.
Research on sequence division and Sedimentary characteristics of Shahezi formation in Xu Dong of Xujiaweizi fault depression
Authors: Di Jiaxiang , Zhang Yuanchang 
Published: September 2019

Abstract
In view of the unclear division of sequence stratigraphy and the unclear understanding of sedimentary characteristics of Shahezi Formation in Xu Dong of Xujiaweizi fault depression, a detailed study on the division of sequence stratigraphy of Shahezi Formation in Xu Dong area of Xujiaweizi fault depression was carried out by using the data of Vail sequence stratigraphy. The sedimentary facies types and plane distribution characteristics of Xu Dong area were analyzed in combination with single well facies and material source supply, etc. The study showed that Shahezi Formation in Xu Dong area could be divided into a second-order sequence, and the interior could be further divided into four third-order sequences. At the early stage of sedimentation, the lake water was relatively deep and fan delta sedimentary system was mainly developed. In the middle period, the lake basin became wider and fan delta and braided river delta sedimentary systems developed. In the late period, the lake basin was basically stable and braided river delta sedimentary system was developed.
Dust concentration estimation of underground working face based on dark channel prior
Authors: Liu Dandan , Ma Quan , Li Dewen , Wang Jie , Liu Heng 
Published: September 2019

Abstract
In this paper, combined with video monitoring system for each working face under the mine, distance measurement system under the mine and Matlab software, real-time monitoring, analysis and calculation of dust concentration under the mine are carried out. Firstly, the image of dust degradation was obtained according to the video monitoring system in the underground dust environment, and the transmission chart with block effect was obtained. Secondly, the obtained transmission figure is processed by Matlab to obtain the corresponding transmission of each pixel in the dust image. Then according to the dust dispersion measurement system to calculate the extinction coefficient, according to the distance measurement system measured the length of the radiation channel distance;Finally, according to the established dust image degradation model, the dust concentration change process and dust mass concentration at each moment and point can be obtained from the extinction coefficient, transmission rate and length of radiation channel. The research method in this paper is rapid and can be used for real-time and online continuous detection, so as to obtain the dust mass concentration and dust distribution in the dust environment.
Experimental study on sedimentation characteristics of fine tailings
Authors: Li Quanming , Liu Yinkun , Zhang Hong 
Published: September 2019

Abstract
The experimental results of sedimentation characteristics of fine-grained tailing at home and abroad are summarized. For fine-grained tailing dam, the particle size of tailing, the discharge concentration of tailing and pore water pressure has significant effects on the sedimentation characteristics of fine-grained tailing dam. Different particle size of tailing will lead to a different structure of tailing deposition, which directly affects the sedimentation characteristics and stability of tailing. The increase of discharge concentration and pore water pressure will also lead to adverse results of tailing sedimentation characteristics.
Study on the Impact of Carbon Emissions on International Agricultural Trade of Countries Along “the Belt and Road Initiative” with China
Authors: Yang Ju 
Published: September 2019

Abstract
The main aim of this study is to investigate the impact of carbon emissions on international agricultural trade. To address this, a stochastic frontier specification of the gravity model is adopted to examine the driving forces of the change in agricultural import and export between 48 countries of 5 regions along “the Belt and Road Initiative” and China with an emphasis on carbon emissions. Based on the findings of the paper, we can draw the following conclusion, first, there is a positive influence of carbon emissions in international agricultural trade. Second, the situation varies among the five regions.
Karst Development Models of Early Plaeozoic Carbonate Rocks on the Southern Margin of North China Platform
Authors: Sun Fengying , Tang Wenfeng 
Published: September 2019

Abstract
This paper analyzes the formation and karst development process of early paleozoic carbonate rocks in the southern margin of North China platform from the aspects of regional stratigraphy distribution, crustal movement and evolution and groundwater recharge and drainage conditions. It is concluded that the karst in the study area is multi-level developed and affected by lithology. Under the control of tectonic movement and groundwater flow, there are three main types of karst development models: bedding karst, water erosive karst, fault zone karst and erosive mining karst.
Design and Implementation of Yunnan Province Soil Environmental Quality Database Based on ArcSDE for Oracle
Authors: Zhao Yi , Liang Hong , Zhou Ningshan , Zhao Juan , Zhang Yuxia , Peng Yinxia 
Published: September 2019

Abstract
The environmental quality monitoring work in Yunnan Province began in the 1970s. After 40 years of development, the Yunnan Province Environmental Monitoring System was initially established. However, the soil environmental monitoring data of the province lacks a unified warehousing standard, and a spatial database of soil environmental quality has not been established to integrate and standardize the data. Based on the research and reference to the relevant standards of soil database construction method and management at home and abroad, GeoDatabase is used as the spatial data model, and the conceptual model, logical organization model and storage model of Yunnan Province soil environmental quality database are designed by using Oracle and ArcSDE technologies. In order to accurately reflect the spatial location of the soil sampling points and the characteristic properties of the samples, and to ensure the uniqueness and rationality of the primary key in the data table, this paper designs the coding of the soil environmental quality database. The construction of soil environmental quality database in Yunnan Province realized the seamless integration of spatial data and attribute data, and provided comprehensive and accurate basic data and scientific decision support for soil pollution prevention and soil ecological restoration in Yunnan Province.
Research of the pollution characteristics of PAHs in air particulate pollutants
Authors: Ma Tongyu , Chu Yiwei , Zhang Bo , Liu Nannan 
Published: September 2019

Abstract
Polycyclic aromatic hydrocarbons (PAHs) and particulate matter (PM) exhibit a slightly positive correlation. Results showed that PAHs and PM2.5 occurred in the following order of areas: urban > suburban > rural. The light-ring PAHs accounted for higher percentage than the heavy-ring ones in PM2.5. Coal burning, human activities, and industrial pollutants were major sources of PAHs in the urban area according to the ratio of specific toxic PAH compounds. Traffic release and coal burning were predominant integrative sources in suburban areas. In rural areas, the contribution of PAH pollution may originate from coal burning and human activities as the result of long-range transportation from urban and suburban areas.
Characterization of carbonized waste materials: Rice husk and saw dust
Authors: Melvin G J H , Chai Kah Fei , Tamiri Fadzlita Mohd 
Published: September 2019

Abstract
Waste materials can be categorized into household, commercial, agricultural, synthetic wastes, and so on. Agricultural wastes play a great role as an alternative material to be derived into valuable carbon materials, due to their low cost and abundancy, in contrast to conventional carbon material sources. Feasible carbonization process of agricultural wastes can be conducted by using heat treatment. The focused agricultural wastes in this study are rice husks (RH) and saw dusts (SD). They are converted into carbon materials through heat treatment under the presence of inert gas at 500°C and 800°C for 2 hours. Then, their characteristics such as structure, morphology, elemental composition, and crystallinity are investigated by utilizing scanning electron microscopy (SEM), Energy Dispersive X-ray (EDX) spectroscopy, and X-ray Diffraction (XRD). Similarly, the carbonized RHs and SDs can be classified as amorphous carbon and possess porous structure. The characteristics of carbonized RHs and SDs indicate that they could be a promising material to be utilized in particular or various applications.
Synthesis of nano emulsion from waste cooking oil for enhanced oil recovery applications
Authors: Noor M I I M , Islam A , Saalah S , Ken C C , Anisuzzaman S M , Kamin Z 
Published: September 2019

Abstract
Enhanced oil recovery (EOR) is a tertiary method to extract potential oil in a matured well. Emulsion, which is one EOR method has properties which enable it to recover oil remains in reservoir rocks of the matured well. Nano sized emulsion or nano emulsion able to recover trapped oil, by capillary force in fine pores of the reservoir rock. Nano emulsion reduces the oil-water interfacial tension and therefore changes the wettability of the reservoir rock. However, the nano emulsion is uneconomical and unstable. Therefore, this work aimed to produce nano emulsions by using low cost waste cooking oil, Tween 80 and Span 80. Ultra-sonication was used to reduce the size of the emulsion. The concentration of surfactant, power of ultra-sonication and time of sonication were varied to study the stability of the oil-in-water and size of the emulsion using the Malvern Zetasizer. The nano emulsion was then tested on a crude oil soak meligan formation sand rock to test the performance of the nano emulsion. The result show values of zeta potential and droplet size were - 15.3 mV and 262.1 d.nm respectively. The emulsion droplet sizes were about 500 nm with milky white appearance. The nano emulsion shows positive results as 63.89 % crude oil displaced from the soaked meligan formation sand rock. As a conclusion, the nano emulsion produced from waste cooking oil can potentially be used for EOR.
Nutrients Recovery Processes for Sewage: A Short Review
Authors: Zahrim A Y , Safie N N , Bolong N , Rajin M , Ismail N M , Saalah S , Yusop M H M , Ongkodun C M , Ricky L N Y 
Published: September 2019

Abstract
The abundance of untreated sewage that consists of valuable nutrients and water scarcity has motivated the community to process and recycle the waste through efficient and sustainable approach. The presence of dissolved nutrients and emerging contaminants are increasing lately due to the rapid anthropogenic activities. Over the years, many studies on sewage processing have been reported in the literature: bioaugmentation, membrane bioreactor, moving bed biofilm as well as adsorption technique for nutrients recovery. The advantages and limitations of these technologies are discussed in brief. Finally, the treated sewage that still contain useful nutrients can be recycled as irrigation water for crops and non-crops plantation, toilet flushing etc. Nutrients that were adsorbed in the filter can be utilized by plant when it is used as growing media.