bluuebunny/crossref_metadata_2025_split huggingface dataset:
Preparation and Properties of SiC Porous Ceramics with Double-Particle Size
Authors: Xu Chengshi , Dong Youming , Liu Yang , Li Huan , Deng Xiangyun 
Published: August 2019

Abstract
In this paper mixed two kinds of SiC particles with different diameter (50-70 mesh and 80-90 mesh) as aggregate of SiC porous ceramics. And the porous ceramic properties were measured when the pore-making agent was 7.5wt%, 10wt% and 15wt% respectively. The experiments show that the porosity, flexural strength and filtration pressure drop of double-particle size porous ceramics is optimized compared with single size porous ceramics. In the pore-forming agent was 10wt% and 50-70 mesh SiC particle was 10wt%, the flexural strength was 40.71MPa, and porosity was 35.69%. It was 4.76MPa and 6.9% higher than single-particle size sample, and the filtration pressure drop has a significant decrease.
The Use of Waste Glass for Cement Production
Authors: Halbiniak J , Major M 
Published: August 2019

Abstract
The vast body of research conducted so far has focused on the use of waste glass as a partial replacement for cement or aggregate in the production of materials with cement matrix. This paper presents an alternative method of using glass waste for cement production. Grinding of previously burnt Portland clinker with glass cullet in green and white colours was used. The glass cullet was ground with Portland clinker in proportions of: 92.5% clinker and 7.5% green and white glass, 85% clinker and 15% green and white glass. Furthermore, pure cement was mixed with green and white glass fragmented in the disintegrator with the same proportions. This allowed for obtaining 8 series of cements (4 series with green glass and 4 series with white glass) and pure cement without waste glass. The compressive strength tests conducted after 2, 7 and 28 days made it possible to analyse the effect of the quantity and colour of waste glass and the method of its application (grinding with Portland clinker, mixing glass with pure cement) on the mechanical parameters of standard mortars. The highest mean compressive strength values after 2, 7 and 28 days were obtained for mortars made of cement coming from grinding of Portland clinker with 15% white glass. Furthermore, the following examinations were conducted: the beginning of the setting time and the degree of grinding of cements.
Toughening Mechanism and Application Analysis of ZrO2 Ceramics under High Speed Strain Condition
Authors: Zhang Lingfeng , Sun Dong , Xiong Yi , Liu Yuliang 
Published: August 2019

Abstract
In order to study the impact properties of ZrO2 ceramics and analyze the failure characteristics to improve the brittleness of ZrO2 ceramics, we used a high-power glass pulsed laser to test the impact of ZrO2 ceramics. Observing the fracture morphology by scanning electron microscopy, we found that the failure of ceramics is mainly caused by spallation. The cracked surface is dominated by typical brittle fractures, and there are more crystals appearing and cracking. The surface does not expand along a single plane, but forms a large number of steps. The direction of the crack and the density distribution indicate that the failure is caused by the reflected tensile wave. At the same time, the surface layer of the material generates a dense compression layer of about several tens of micrometers due to compressive stress, and no cracking occurs in the compression layer. This mechanism indicates that ZrO2 ceramic materials with surface strengthening and matrix toughening can be formed under suitable laser energy.
Spreading and Wetting Behaviors of Sn2.5Ag0.7Cu0.1RE0.05Ni Solder on the Surface of Cu Substrate under Ultrasonic Vibration
Authors: Yin Chenxiang , Zhang Keke , Li Shijie , Li Junheng 
Published: August 2019

Abstract
The spreading and wetting behaviors of Sn2.5Ag0.7Cu0.1RE0.05Ni lead-free solder on the surface of Cu substrate under ultrasonic vibration were studied by SEM, EDS and other methods. The ultrasonic time was 1, 2, 3, 4, 5 s, respectively and was compared with the spreading of solder in the condition of soldering flux. The results showed that the Sn2.5Ag0.7Cu0.1RE0.05Ni solder was forced to spread instantly on the base metal surface under the action of ultrasonic vibration, and the ultrasonic cavitation can crush the oxide film on the surface of solder and base metal, resulting in the wetting of liquid solder and base metal. When the ultrasonic time was 3 s, the spreading area and spreading ratio of the solder achieved the maximum, and the ultrasonic cavitation could break the β-Sn and eutectic structure of the solder during solidification, refining the microstructure and improving the hardness of the solder matrix.
Thermoelectric Properties of Bi2Sr2CO2Oy/Cu2Se Composites
Authors: Li Erying , Liu Congbin , Song Hongzhang 
Published: August 2019

Abstract
The Cu2Se nanopowder was fabricated by the hydrothermal synthesis, then the thermoelectric properties of Bi2Sr2Co2Oy + x wt% Cu2Se (x = 0.0, 0.25, 0.50, 0.75, 1.00, and 1.25) composites prepared by the solid state method were investigated from room temperature to 875 K. The Cu2Se dispersant with an appropriate amount played a significant role in decreasing resistivity. Although the Seebeck coefficients also decreased slightly, the power factors of the doped samples got significant improvement. Furthermore, the thermal conductivity was depressed apparently. Ultimately, the Bi2Sr2Co2Oy + 0.5 wt% Cu2Se sample showed a better dimensionless figure of merit (ZT) value of 0.14 at 875 K. Compared with the pure Bi2Sr2Co2Oy sample, it was improved about by 25.5%.
Influence on Aggregation Structure Changes of Retired Cross-linked Polyethylene (XLPE) Cable Insulation under Pre-qualification Test
Authors: Wang Xiangbing , Liang Aiwu , Wang Yanfeng , Zhu Wenwei , Zhao Yifeng , Dai Xinyun , Fan Xinghui , Xie Yue , Liu Gang 
Published: August 2019

Abstract
In order to investigate the cross-linked polyethylene (XLPE) insulation characteristics of a retired high-voltage cable that has been in operation for 16 years and to evaluate the reliability of reusing it for practical operation, a 180-day pre-qualification test method was applied to a section of this cable to inspect the changes of aggregation structure. In this paper, the electric field and the thermal field of the inner, medium and outer positions of the insulation under the accelerated aging test were analyzed and converted to the corresponding equivalent condition at the surface of the conductor core. It can be found that equivalent testing conditions of the medium and outer positions are close to the cable practical operation condition. The diagnostic measurements of fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC) and X-ray diffraction (X-ray) were conducted to analyse the aggregation structure of the samples. The results showed that the molecular chain of the inner position of the cable insulation was damaged and the crystalline structure was slightly degraded under high-strength test condition. On the contrary, the crystalline structure of medium and outer positions were both improved after the accelerated aging test because of the reduction of the impurities and the annealing effect. So it can be expected that the rest of this retired cables still have the potential to reuse in long-term actual operation condition.
Preparation of Boronic Acid-Functionalized Magnetic Nano-Particles by Polarity-regulating Molecular Self-assembly
Authors: Cheng Wenkai , Mo Pinjun , Chen Fei , Deng Meng , Xu Jinbao , Wang Wei , Zhong Guolun 
Published: August 2019

Abstract
Boronic acid-functionalized magnetic nanoparticles were prepared and characterized in this investigation. At first, the single-layer oleic acid-coated Fe3O4 magnetic nanoparticles were prepared by the chemical coprecipitation method and then the nanoparticles were surface-modified by a layer of poly(4-vinylphenylboronic acid) by the polarity-regulating molecular self-assembly technique to obtain the boronic acid-functionalized magnetic nanoparticles (Fe3O4@OA@BA). The resulted nanoparticles were characterized by Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analyzer (TGA), transmission electron microscope (TEM) and vibrating sample magnetometer (VSM). The results show that the molecules of oleic acid can form the inner layer chemisorption on the surface of Fe3O4 and the double-layer coating structure on the outer layer. The poly(4-vinylphenylboronic acid) coated nanoparticles with content about 26% have an average size of 15 nm and the saturation magnetization of 43 emu/g. Finally, the adsorption effect of Fe3O4@OA@BA on bovine serum albumin (BSA) was studied. Under optimal adsorption conditions, the adsorption capacity on BSA is 135μg/mg, which embodies the superiority of molecular self-assembly to prepare functionalized nanoparticles.
Transfer Potential and Scheme Optimization of the Central Encryption Well Area of Block A-1
Authors: Wang Haiyong 
Published: August 2019

Abstract
After the encryption adjustment in the central encryption well area of block A-1, the production in the well area is improved, but at the same time, the production decline of old wells in the well area is accelerated, and water injection is not effective in some oil wells. In order to improve the wells development effect, the adjustment of injection-production system in this well area is analysed in detail, three transfer schemes are designed, the feasibility of different schemes is compared and analysed, it is preferred to select scattered transfer as the best transfer scheme.
Study On Thin Differential Interpretation Method Of 0.2 m High Resolution Logging Series in Sabei Development Zone
Authors: Jia Mingtao , Bai Junhui 
Published: August 2019

Abstract
Sabei development zone has entered a stage of development for determining remaining oil distribution of plane scattered, longitudinal mainly concentrated on the thin layer and thick thin poor parts of the reservoir, the existing in DLS logging series layered rate will not form a complete set, and the problem of insufficient depth lead to form a complete set of logging interpretation of water-out reservoirs technology, on the untabulated reservoir and thin poor reservoirs under 0.4 meters can’t realize the quantitative explanation, become the bottleneck of poor thin reservoir interpretation in the future. The development of the new series of 0.2m can effectively solve the problem of thin differential zone interpretation by improving the vertical resolution and horizontal detection depth, and establishing the logging interpretation technology matching this technology, so as to meet the need of fine tapping remaining oil in the development stage of extra-high water-cut development in sabei development zone and better guide the dynamic development and adjustment of oilfield.
Stress Analysis of Orthotropic Wedge Loaded on the Apex
Authors: Jia Purong , Suo Yongyong , Jia Cheng , Wang Qiang 
Published: August 2019

Abstract
The complex variable function including a material parameter is analyzed for the solving the mechanic problem. Typical stress boundary condition for a wedge is considered to orthotropic materials. By constructing new stress function, the mechanic analysis of the wedge subjected to a concentrated force is carried out. The stress boundary problem and the governing equation are studied. The formulae of the stress fields in rectangular and polar coordinates are derived for the composite wedge.
Investigating the Pollution Characteristics and Primary Components Source Apportionment of PM10 in Nanjing Port
Authors: Wang Zheng , Liu Chunling , Qin Cuihong , Zheng Wei , Liu Ying , Peng Chuansheng 
Published: August 2019

Abstract
In order to investigate the characteristics and the sources of PM 10, the Nanjing port was selected as the sampling site for atmospheric PM10 samples collections. The sampling was introduced during represent months in summer and winter. Then the elements, ions and OC/EC chemical components were detected by ICP-MS, ion chromatography and carbon analyzer, respectively. The results showed that the average concentration of atmospheric PM 10 in summer and winter for Nanjing port Was 88.1 ± 31.9 μg/m 3 and 136.9 ± 76.8 μg/m 3, respectively. The concentrations of in organic secondary Components In summer and winter were25.4μg/m 3 and 40.8μg/m 3, accounting for 28.9% and 31.1% of the total PM 10, respectively; the concentration was highest for NO 3 - in summer and for SO 4 2- in winter. There is obvious difference between the concentration of carbonaceous components in summer and winter, and the concentration of total carbonaceous components was 88.1 ± 31.9 μg/m 3 and 136.9 ± 76.8 μg/m 3, accounting for 24.4% and 39.7% of the total PM 10, respectively; Variation of primary carbonaceous components is the reason Causing the difference s. Source apportionment results indicate d that the soil dust and coal combustion, metallurgy, motor vehicle, ship and sea salt were the main contributors To the PM 10 in Nanjing port. Soil dust contributed most (33%), and the contribution percentages of sea salt and ships were approximately 6.4% and 6.6%, respectively. The contribution s of sea salt and ship emissions in winter were slightly higher in winter than that in summer.
Research on Comprehensive Utilization of Construction Waste in Shandong Province
Authors: Liu Doudou , Mehmood Waqar , Qiao Liang , Zhang Feng 
Published: August 2019

Abstract
The primeval disposal ways of construction and demolition waste, including simple stacking and landfill, are not suited to the social and economic sustainable development and ecology civilization construction. Indeed, the comprehensive utilization has been considered as an effective approach to solving construction and demolition waste. According to the investigation research of the comprehensive utilization of construction and demolition waste in Shandong province, this paper summarized the current present status about the comprehensive utilization of construction and demolition waste and put forward some suggestions were given for the existing problems, which was expected to provide the reference for the comprehensive utilization of construction and demolition waste.
High Precision Sequence Division and Geological Significance of Nantun Formation in Wunan Subsag
Authors: Li Junhui 
Published: August 2019

Abstract
Based on the data of core and logging, high precision sequence stratigraphic framework of Nantun Formation of Wunan subsag, Wuerxun Depression in Hailar Basin and sedimentary systems distribution characteristics which is under its control are studied. It shows that there are five types of sequence boundaries in Nantun Formation, and it can further be broken into 3 three-level and 9 four-level sequence. According to the variation of remaining layer thickness of each sequence, the change rule of deposition centers in Nantun Formation appears transferring to west gradually, and from down to up the formation distribution characteristics changes from ‘medium thickness to east and west thin’ to ‘west thick- east thin’. During the sedimentary period, four sedimentary systems mainly develops: braided river delta, fan delta, sublacustrine fan and lake. The plane distribution of sedimentary system has the characteristics of ‘east-west zoning’. The fan delta sedimentary system mainly develops in the western Wuxi slope zone, and the braided river delta mainly develops in the eastern Wudong gentle slope zone. The plane distribution characteristics of each sedimentary system in different periods have obvious inheritance.
Research on the Influence of Indoor Relative Humidity on PM2.5 Concentration in Residential Buildings
Authors: Zhang Ji , Zhou Zhihua , Wang Chendong , Xue Kedi , Liu Yurong , Fang Mingliang , Zuo Jian , Sheng Ying 
Published: August 2019

Abstract
This study presented an experimental analysis to investigate the influence of the RH on PM2.5 concentration in a typical residential building in Tianjin, China. PM2.5 concentrations were measured using an aerosol monitor in different conditions of three RH scenarios, two pollutant sources and two initial pollutant concentrations. It was observed that about 95% of the size of particles produced by cigarette and wormwood are smaller than 1μm, and the particulate matters produced by wormwood has smaller particle size than that produced by cigarette. Results shows humidification is a practicable method to accelerate the deposition rate of PM2.5. Furthermore, the larger the particle size, and the higher initial pollutant concentration, the more significant influences of the RH on PM2.5 concentration. Considering the requirement of human comfort, the RH is recommended to be controlled at the range of 60%-70% when the indoor PM2.5 pollution is serious. Although humidification can reduce indoor PM2.5 concentration to a certain extent, it cannot reduce the PM2.5 concentration to the permissible range in a short period of time. Therefore, it is recommended to use RH control together with purification device.
Evaluation of PC-SAFT on the Saturation Pressure Prediction of Different Mixture System at High Temperatures and Pressures
Authors: Lv Junchen 
Published: August 2019

Abstract
Perturbed-chain statistical associating fluid theory (PC-SAFT) equation of state (EOS) has been used to predict saturation pressure of five different mixing systems which are n-alkane mixture, CH4-CO2-H2O mixture, CO2-dimethyl carbonate (DMC), C3H8-pentafluoroethane (PFE) and methanol-methyl propionate (MTP) under high temperatures and pressures conditions. The data for those five types of mixing systems are cited from previous research. For the n-alkane mixture, PC-SAFT prediction is compared with experimental data. The mixture composition is 30%-70% CH4-C6H14, 50%-50% CH4-C6H14 and 70%-30% CH4-C6H14, respectively. The average absolute relative deviation (AARD) for each mixture is 1.51%, 2.68% and 4.87%. As for 20%-80% CO2-H2O and 4%-16%-80% CH4-CO2-H2O mixture, the AARD is 1.27% and 4.14%, respectively. The AARDs of PC-SAFT prediction on different CO2-DMC mixture are 0.78%, 0.72% and 0.91%, and the overall AARDs between PC-SAFT prediction and experimental data for C3H8-PFE and methanol-MTP mixtures are 6.76% and 5.5%, respectively. Compared with Peng-Robinson (PR) EOS used in original work, PC-SAFT EOS successfully predict the bubble point pressure for common substances used in chemical industry.
Synthesis and Electrochemical Performance of TiO2/rGO Composites with Different Layers of Graphene Oxide as Anode Materials for Lithium-ion Battery
Authors: Geng Chunyan , Yu Jin , Shi Fanian 
Published: August 2019

Abstract
The lithium-ion battery anode materials TiO2/rGO were synthesized from different layers of graphene oxide (GO) and Titanium oxysulfate using hydrothermal method. The structure and morphology were studied by X-ray diffraction (XRD), scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR). Their electrochemical performances were tested through galvanostatic charge/discharge and electrochemical impedance spectrum (EIS). The test results show that the TiO2/rGO (few-layers) composites exhibited better electrochemical performance than the TiO2/rGO (multi-layers) composites. At the current density of 100 mA/g, the discharge capacity of TiO2/rGO (few-layers) is 285.3 mAh/g after 100 cycles, and the Coulombic efficiency is still maintained as high as 98.6%, which is superior to that of the TiO2/rGO (multi-layers). TiO2/rGO (few-layers) electrode shows good rate capability and enhanced electrochemical performance compared with the TiO2/rGO (multi-layers) electrode.
FRMN - A Face Recognition Model Based on Convolutional Neural Network
Authors: Shang Shifeng , Liu Haiyan , Qu Qiang , Li Guannan , Cao Jie 
Published: August 2019

Abstract
A face recognition model based on Convolutional Neural Network was proposed in this paper. This model mixed local and global image features at the largest extent. By acquiring the good local feature from mouth, nose and mouth, it is great improvement to enhance the accuracy for face recognition. From the experiment results, this model can better abstract the global feature and show a great improvement in face recognition.
Concrete Footings with Different Socket Shapes Subjected to the Axial Compressive Load
Authors: Major M , Major I , Kuliński K 
Published: August 2019

Abstract
These paper concrete footings with pyramid ended sockets are discussed in comparison to the typical socket foundation constructions. Discussed connection with cut-off pyramid creates opportunity to reduce the required height of foundation in comparison to the typical solutions and leads to reduced weight as well as costs of foundation casting. Comparative analysis covered three different external shapes for both foundations (with normal and pyramid ended socket) i.e. prism, stepped and sloped. The subject of interest was if and how much the height of foundation could be reduced in comparison to the normal socket footing. Numerical analysis was performed with the utilization of SolidWorks Finite Element Method based software.
Improving Social Responsibility of Inspection and Testing Institutions by Using ISO 26000
Authors: Zhao Weiwei , Ye Ruyi 
Published: August 2019

Abstract
At present, inspection and testing has become one of the most dynamic emerging service. However, some inspection and testing institutions engage in fraud for the sake of interests, which leads to damage to the interests of consumers and seriously affects the credibility of the entire industry. For example, Sanlu Group’s milk power added melamine, German Volkswagen admitted cheating in testing for carbon dioxide emissions, Japan’s automobile waste inspection fraud, Randau testing service (RTS) of the British government and police had falsified blood sample tests. Fulfilling social responsibility is an essential requirement for inspection and testing institutions to carry out activities, which is an important guarantee and obligation for credibility and an inherent need for sustainable development. Based on the research and analysis of ISO 26000, this essay focus on how to improve the social responsibility of inspection and testing institutions. It introduces basic characteristics of social responsibility of inspection and testing institutions, such as fairness, honesty and good service. Then it discusses how inspection and testing institutions fulfill their social responsibilities, especially in terms of organizational governance, labour practices and human rights, environment and community involvement, fair operating practices and customer issues.