bluuebunny/crossref_metadata_2025_split huggingface dataset:
Study on High efficiency pre-cracking Technology of Coal seam
Authors: Xiangbao Meng , Xuesong Ma , Zhenping Wang , Yansong Zhang , Xu Ma , Jiquan Sun 
Published: September 2019

Abstract
More than 90% of coal seams in our country are low permeability coal seams, which seriously affects the safety of mine production. Therefore, a kind of solid pre-splitting agent is studied in this project, and the effect of coal seam pre-splitting test is studied in Nantun coal mine. This paper introduces the action principle of the solid pre-splitting agent, and then tests and studies the fracture pore characteristics of the coal in Nantun coal mine, selects the reasonable pre-crack drilling arrangement scheme, carries on the coal seam pre-cracking experiment and collects the results. Through the comparison of the pre-splitting effect of coal seam, it is concluded that the pre-cracking radius of this technology can reach 25 meters, which makes the primary and secondary fractures in the coal body expand, the coal body joints, and the fracture penetration network, thus increasing the permeability of the coal seam. At the same time, a large number of uniform cracks were produced because of the pre-splitting, which improved the lump coal rate. The pre-splitting reduces the coal dust concentration and the strength of the coal body, and reduces the energy consumption of cutting ratio, thus realizing the energy-saving and clean mining of coal mine.
Studying on Conversion of Oblique Photogrammetry Data Based on OSG and ARX
Authors: Ming Ruan , Meiting Xie , Hua Liao , Fen Wang 
Published: September 2019

Abstract
Oblique photogrammetry data processing is a hotspot of current urban 3D model application research. Aiming at the problem that oblique photogrammetry data can not be directly loaded and displayed on AutoCAD, based on OSG 3D rendering engine and ARX secondary development technology, take the OSGB data into the DWG file as an example, this paper analyzes the oblique photogrammetry data format and the organization of the DWG model on AutoCAD and summarizes a conversion method of oblique photogrammetry data. The example shows that the method introduced in this paper can correctly realize the conversion of the oblique photographic data, and provides a reference for more industries to apply oblique photogrammetry data.
The Application of Shallow Seismic in the Exploration of Aeolian Sand Strata
Authors: Zheng Jinming , Xie Fengyu , Bai Youliang 
Published: September 2019

Abstract
Shallow seismic exploration has significant application effects in terms of bedrock surface and underground structure exploration, detection of underground cavities and unfavorable geological bodies. It is a scientific and economical technical method to provide basic information of feasibility study and engineering planning for site selection of highways, airports and high-rise buildings. Taking the pre-selection of a tunnel project in Gansu as an example, this paper elaborates on the interpretation methods and techniques of the shallow seismic exploration data processing in the aeolian sand stratum based on the geophysical characteristics of the work area. Generally speaking, the interpretation results are highly consistent with the drilling results and can be applied to engineering surveys in similar strata.
Study on spatial distribution and carbon balance of major carbon sources and carbon sinks in Nanjing
Authors: Yixin Huang , Xiangchen Xia , Lu Geng , Li Yang 
Published: September 2019

Abstract
In order to explore the current situation of carbon balance in Nanjing, with the above designated size industrial enterprises, 4993 residential communities and green areas as research objects, ArcGIS and ENVI software are used to spatially analyze the main carbon sources and carbon sinks in Nanjing. The calculation formulas of carbon sources and carbon sinks are used to calculate the carbon emissions and absorption of various districts in Nanjing, and compare the carbon balance of each district. The results show that: (1) the industrial and residential communities in Nanjing show the characteristics of agglomeration distribution; (2) the green land is mainly concentrated in the outskirts, which is mostly based on cultivated land; (3) the carbon balance coefficient of Nanjing city is 68, and all regions are in the carbon imbalance state, in which Qinhuai District is the most severe. Finally, from the planning point of view, suggestions for the construction of Nanjing City to improve the ecological environment of Nanjing and promote green sustainable development are proposed.
Research on P-Δ Effect Increase Coefficient of Independent Steel Tube Lightning Rods in Substation
Authors: Huang Zhenxing , Shu Yueshui 
Published: September 2019

Abstract
To optimize the design method of ISTLR (independent steel tube lightning rod) in substations, ANSYS was used to investigate increase coefficient (called P-Δ Effect increase coefficient) of top HD (horizontal displacement) of ISTLRs under wind load when considering P-Δ Effect compared with that not considering. The results show that the P-Δ Effect increase coefficient is about 1.05. Therefore, the HD of the top can be calculated without considering the P-Δ Effect when designing the structure of the ISTLRs. It can be multiplied by the P-Δ Effect increase coefficient 1.05 and controlled by not exceeding the limit value H/70 of the norm.
Thermodynamic Design of Public Space Based on Outdoor Thermal Comfort——Take Yangpu Bridge Riverside Park Competition Scheme as an Example
Authors: Li Linxue , Zhang Qi 
Published: September 2019

Abstract
This paper attempts to make outdoor thermal comfort as an evaluation index to apply in the public space design, trying to make the design achieve the goal of ideal comfort environment from the beginning to the completion, and to form a simulation optimization method of ‘Design Follows Comfort’. And the attempt takes a case in Shanghai, China as an example. In this case, UTCL is used as the evaluation index and ladybug simulation tool is used to evaluate outdoor thermal comfort and assist in optimizing architectural design. Optimizing the goal of thermal comfort in different stages of the design will help to integrate various elements of architecture so that the considerable comfort in severe climatic conditions will be provide to users.
Understanding and Practice of Room Temperature Control Method Based on Energy Saving Reconstruction of Public Buildings
Authors: Song Jing 
Published: September 2019

Abstract
In order to respond to national energy conservation and environmental protection policies, green building development strategies should be implemented in urban public buildings construction, and large-scale project energy-saving renovation plans should be implemented from the perspective of energy conservation. Different projects can adopt different energy-saving control methods according to actual conditions and adopt different control strategies, but the ultimate goal is to change the current situation of large energy consumption, high utilization efficiency, noise pollution, water pollution and air pollution emissions. Building energy-saving renovation and technical control, effectively improves the building energy-saving level, achieves energy-saving and consumption-reduction goals, and gives full play to the value of various resources. At the same time, the energy-saving renovation project can also help enterprises to obtain the maximum economic and social benefits and promote the sustainable development of the construction industry. In view of this, this paper will talk about how to achieve energy-saving goals in the energy-saving renovation of public buildings from the aspects of energy-saving design of indoor supporting facilities, energy-saving design of walls, energy-saving design of doors and windows and roofing energy-saving design, and how to achieve reasonable control of room temperature.
Identification of True and False Aksu Apple Based on NIRS and PLS-DA
Authors: Lv Chenfei , Yang Jinghui , Liu Yanjun , Yang Renjie , Zhang Chao , Wu Nan 
Published: September 2019

Abstract
A method for the identification of true and false Aksu Red Fuji apple varieties based on near-infrared spectroscopy (NIRS) and partial least squares discrimination (PLS-DA) was proposed and established. Authentic Xinjiang Aksu Red Fuji and ordinary Red Fuji (Shandong and Shanxi Red Fuji) were purchased from supermarkets. There were 42 samples in each variety, with totaling 126 samples. Near infrared diffuse reflectance spectra of all samples were collected in the range of 4000-12000 cm−1. On the basis of studying the characteristics of NIR spectra, the principal component analysis (PCA) was carried out. It is pointed out that PCA method cannot fully realize the identifcation of three kinds Red Fuji Apples. Finally, the partial least squares discriminant analysis model of three kinds Red Fuji Apples was established, and the correct discrimination rates of the three kinds Red Fuji Apples were 100% for samples in calibration set and prediction set.
Lead(II) removal from wastewater by water hyacinth
Authors: Yi Zhengji , Liu Jian , Liu Xing , Zeng Rongying , Cui Ying 
Published: September 2019

Abstract
Lead(II) contamination is a serious environmental problem. The purpose of this research is to discuss the feasibility of utilizing dead water hyacinth granule to eliminate lead(II) cations from aqueous solution through batch tests. Effects of contact time, medium acidity-alkalinity, and solution lead concentration on this biosorption process were detailedly studied. The experimental result suggested that the lead(II) biosorption depended highly on the medium pH. A pH of 5.0 was most helpful to lead(II) removal. The biosorption data conformed to pseudo-second-order kinetics and the biosorption equilibrium time was equal to 45 minutes. The biosorption isotherm data could be characterized using Langmuir model accompanied with the maximum biosorption capacity of 75.44 mg/g. Our findings revealed that water hyacinth could be an efficient adsorbent for lead(II) elimination.
Effect of Different Tillage Methods on Soil Emissions of N2O and Crop Yield in North China Grain Field
Authors: Xiaoxiao Shu , Li Qi 
Published: September 2019

Abstract
By analyzing the published literatures of wheat and maize fields in North China, the effects of different farming methods on N2O emissions and crop yields in grain fields were determined. The results showed that in the North China grain field, the no-tillage technology reduced the N2O potential in the wheat season, while the N2O difference in the corn season using no tillage, conventional tillage, deep pine and alfalfa was not significant. Therefore, the implementation of no-till measures in the north wheat grain field in North China can reduce emissions and increase production, while the corn field suggests conventional tillage, deep pine or alfalfa cultivation on the basis of straw returning, which can stabilize production and reduce emissions.
Effect of DGA substituent structure on rare earth extraction in nitric acid media
Authors: Du Huihui , Peng Xiujing , Cui Yu , Sun Guoxin 
Published: September 2019

Abstract
N substitutent group structure has great influence on the extraction and separation ability of amide extractant. In this paper, four different extractants with different structures, namely TODGA (N,N,N’,N’-tetraoctyl-3-oxa-diglycolamide), T2EHDGA (N,N,N’,N’-tetraisooctyl-3-oxa-diglycolamide), DPDODGA (N,N’-dipropyl-N,N’-dioctyl-3-oxa-diglycolamide) and DIPDODGA (N,N’-diisopropyl-N,N’-dioctyl-3-oxa-diglycol-amide) were investigated. The extraction ability of rare earth elements in nitric acid system was investigated to understand the relationship between chemical structure of the extractant and the extraction and separation properties of rare earth ions. The effects of nitric acid acidity, rare earth metal ion concentration and extractant concentration on the extraction were also investigated.
Experimental Study on Catalytic Oxidation of Toluene with Manganese Catalysts and Ozone at Low Temperature
Authors: Guan Jie , Wang Di , Yuan Hao , Guo Yaoguang , Dai Jue 
Published: September 2019

Abstract
The single metal oxide catalyst of transition metal element Mn and the composite metal oxide catalysts of Mn-Co and Mn-Fe are prepared by impregnation method using activated carbon (AC) as carrier. The catalysts are characterized by x-ray diffraction (XRD), scanning electron microscope (SEM) and energy dispersive spectroscopy (EDS). The performance of the catalysts for catalytic ozonation of toluene is tested in a fixed bed tubular reactor. The results show that the activity of the single metal oxide catalyst of Mn is lower than that of the composite metal oxide catalysts of Mn-Co and Mn-Fe, and the activity of Mn-Co is higher than that of Mn-Fe. The catalytic efficiency of three catalysts is Mn/AC< Mn-Fe/AC> Mn-Co/AC. In this study, the factors influencing the degradation of toluene by catalytic ozonation are analyzed, and the mechanism is explored.
Preparation and Optical Properties of TiO2-SiO2 thin films by Sol-gel Dipping Method
Authors: Wang Jun , Ran Qianwen , Xu Xunhu , Zhu Binghua , Zhang Wenjuan 
Published: September 2019

Abstract
TiO2, SiO2 and TiO2-SiO2 thin films were prepared by sol-gel dipping method on glass substrates. The pyrolysis behavior of TiO2 and SiO2 dry gel were tested by differential thermal analysis (DTA). The microstructure and optical properties of the TiO2, SiO2 and TiO2- SiO2 were studied by X-ray diffraction (XRD) and ultraviolet and visible spectrophotometer. The results showed that the phase structure of the films was affected by the composition. All the films were transparent in the visible region. Meanwhile, the transparency of SiO2 was better than TiO2 and TiO2-SiO2 composite film. The ban-gap of the TiO2, SiO2 and TiO2-SiO2 thin films were 3.79, 4.01 and 3.91.
Life Cycle Assessment of Straw Solid Particle Molding Fuel Manufacturing Process
Authors: Zhao Fei , Liu Guodeng , Sun Pengcheng , Bi Wenxin , Gong Xian 
Published: September 2019

Abstract
Taking a 500,000 t/a straw briquette fuel plant in Baoding area of Hebei Province as an example, this paper establishes a life cycle energy consumption and environmental emission analysis model of straw solid fuel. Based on this model, the energy saving and greenhouse gas emission reduction potential of straw solid particles as typical briquette fuels are quantitatively analyzed. Secondly, the life cycle energy consumption and environmental emissions are analyzed. Finally, from the point of view of energy consumption and environmental emissions, the potential value of environmental impact is calculated by standardization and sensitivity analysis is carried out. The results show that the energy consumption of straw granulation stage (compression molding stage) accounts for the largest proportion in the solid particle manufacturing life cycle, reaching 32.30%. Compared with fossil fuels, solid particles have a large emission reduction advantage, which provides basic data for the utilization of straw solid granular forming fuel.
Research on the Method of Evaluating Psychological Stress by EEG
Authors: Zhang Shuo , Li Binlin , Chen Xuanru , Lu Tong , Zhao Chunhua , Ren Jie , Ji Xiaoqiang 
Published: September 2019

Abstract
Stress is the source of all diseases, and the detection and management of psychological stress are very essential to everyone. In this paper, a stress evaluating system based on the EEG is designed for evaluating the state of psychological stress objectively. Firstly, the changes of EEG signals are obtained in real-time by using TGAM modules. Then the signal processing and wireless transmission are carried out by using Bluetooth technology to the computer. The pressure eigenvalues of EEG, which includes focal point, the edge spectrum, EEG pressure index and so on, are extracted. Finally, the results of the EEG analysis are to realize the automatic evaluation of stress state. At the same time, the experiment of pressure induction and evaluation is designed for verifying specific groups and combined with the VAS test. The results show that the EEG analysis can detect psychological stress more objectively, comprehensively and accurately.
Influence of Vertical Hole Defects on Ultrasonic Test
Authors: Yannan Du , Xuchen Zhu , Weiping Ouyang , Xiaoying Tang , Xiaolong Xue , Ju Ding 
Published: September 2019

Abstract
9Ni steel has good toughness and high strength. This paper focuses on the influence of vertical hole defects on the ultrasonic propagation characteristics, which are studied from two aspects of the propagation characteristics of the base metal and the ultrasonic waves of the weld, respectively. The acoustic reflection characteristics of the reflector are compared with the acoustic reflection characteristics of the two different welding processes, (manual welding and automatic welding). It is shown that the gain compensation of the weld is larger than the gain of the same diameter and the same position of the vertical hole in the base metal. The gain compensation of the automatic welding is larger than that of the manual welding. The ultrasonic attenuation in the automatic welding is larger than that of the manual welding. The results of the study contribute to improving the application of ultrasonic testing in 9Ni weld joints.
Effect of Cross-slot Defect in welded joint on Ultrasonic Test
Authors: Yannan Du , Xuchen Zhu , Weiping Ouyang , Xiaoying Tang , Xiaolong Xue , Ji’ai Xue 
Published: September 2019

Abstract
This paper focuses on the influence of vertical hole defects on the ultrasonic propagation characteristics, which are studied from two aspects of the propagation characteristics of the base metal and the ultrasonic waves of the weld, respectively. The acoustic reflection characteristics of the reflector are compared with the acoustic reflection characteristics of the two different welding processes, manual welding and automatic welding, and the properties of the base material. It is shown that the cross-slot of the weld is different from the cross-slot in the base metal, and the attenuation of the ultrasonic wave in the base metal and the weld is different. The gain compensation is too large, and the automatic welding gain compensation ratio of the upper groove of the weld is lower. The automatic welding gain compensation of the cross-slot is large, and the manual welding gain compensation of the lower cross-slot is higher than that of the automatic welding, and the cross-slot gain compensation of the automatic welding upper surface weld is higher than that of the manual welding.
Preparation and Characterization of Water-soluble ZnSe: Fe/ZnSe Quantum Dots
Authors: Huang Meijing , Qiu Chunhong , Huang Fenghua 
Published: September 2019

Abstract
Water-soluble Fe-doped ZnSe/ZnSe quantum dots (ZnSe: Fe/ZnSe QDs) were prepared through a facile, low-cost and effective strategy in aqueous solution using L-cysteine ( L-cys) as modifier. X-ray diffraction (XRD) studies showed that the prepared ZnSe: Fe/ZnSe QDs belonged to zinc blende crystal structures. Transmission electron microscopy (TEM) exhibited that the average diameter of ZnSe: Fe/ZnSe QDs was about 2.9 nm. Infrared spectrum (IR) exhibited that the L-cys has been successfully modified to QDs. The tests of Ultraviolet-visible (UV-vis) spectrum exhibited that the absorption edge position of ZnSe: Fe/ZnSe QDs had a sight red shift with the deposition of ZnSe shell. The fluorescence properties of obtained ZnSe: Fe/ZnSe QDs were investigated through photoluminescence (PL) spectrum. The results exhibited that the PL intensity of ZnSe: Fe/ZnSe QDs has been improved obviously compared with ZnSe: Fe QDs.
Failure Mode of a Fiber-reinforced Polymer-matrix Composite Laminate Subjected to Transverse Tensile
Authors: Wang Ben , Xue Xiang Chen , Hu Jiang Bo , Yu Tian Qi 
Published: September 2019

Abstract
To study the damage and failure mechanism of a canbon fiber-reinforced bismaleimides-matrix composite laminate subjected to transverse tensile, tensile experiments with acoustic emission technology on [90]16 laminates are implemented, while the analysis on signal parameters is conducted. Meanwhile, 2D microscopic RVE is modeled to simulate the plastic deformation on matrix and failure on interface by using ABAQUS. The study shows that it is mainly matrix that bears the load under the tensile subjected to [90]16 laminate. During the load, elastic deformation and plastic deformation occur in the material. And then the interface between fiber and matrix debond and failure. The results of experiment and stimulation agree well. It will uncover the process of damage’s initiation to evolution and extension in laminates.
Study on the relationship between lithology and reservoir characteristics of Yingcheng Formation in the southern Songliao Basin
Authors: Wen-qing Niu , Yun-liang Yu , Guang Yang , Ming-xuan Niu , Shan-shan MA 
Published: September 2019

Abstract
In order to deeply understand the relationship between the microstructural characteristics of volcanic reservoirs and the lithology of volcanic rocks, it provides important theoretical significance for the effective development of volcanic reservoir oil and gas fields. The microscopic characteristics of the volcanic reservoirs of the Yingcheng Formation in the Songliao Basin were analyzed by means of rock section determination, pore structure parameters analysis and casting thin section analysis. The results show that the target layer has low porosity and permeability, and the volcanic pore structure of different lithologies is different. Volcanic lava generally develops original gas pores, phenocryst dissolved pores, matrix dissolved pores, and tectoclase, while volcanic clastic rocks generally have developmental dissolution pores as the main feature. The micro-heterogeneity of volcanic reservoirs is generally strong, and the development of tectonic fractures is an important factor in changing the reservoir performance of volcanic rocks.
The Horizontal Variation Process and Rule of Bottom Waters Impacted by Cd Contents from Sources
Authors: Yang Dongfang , Su Chunhua , Wu Yunjie , Fan Bailing , Zhu Sixi 
Published: September 2019

Abstract
According to the investigation data of Jiaozhou Bay in 1991, the current content and horizontal distribution of Cd contents in bottom waters from central to southern Jiaozhou Bay were studied in this paper. The results showed that in May, Cd content in this area was 0.06-0.10μg/L, and Jiaozhou Bay was not polluted by Cd content. In August, the range was 0.06-0.38μg/L, and Jiaozhou Bay was not polluted by Cd content. In October, the range was 0.26μg/L, and there was no pollution of Cd content in Jiaozhou Bay. Hence, in May, August and October, Cd contents in this area were low, far lower than 1.00μg/L, the Case I Sea Water Quality Standard. In terms of Cd content, water is clean, not polluted by Cd content. In May, in surface waters of bay center, there is not source to transport Cd content. In bottom waters from bay center to northern bay mouth, Cd content decreased from 0.08μg/L in bay center to 0.06μg/L in northern bay mouth along with the gradients. In August, Cd was high as0.40μg/L in surface waters of bay center, mainly from atmospheric sedimentation, which is relatively high. In bottom waters from bay center to northern bay mouth, Cd content decreased from 0.38μg/L in bay center to 0.16μg/L in northern bay mouth along with the gradients. In this paper, the impact of Cd contents from sources on bottom waters was studied. Besides, the horizontal variation of Cd contents disclose the variation of bottom waters influenced by Cd contents from sources.