bluuebunny/crossref_metadata_2025_split huggingface dataset:
Thickness-dependent Strengthening Effect of Grain Refiner Al3Zr and Al3(Zr,Sc) in Al Alloys
Authors: Li Chunmei , Jiang Xianquan , Cheng Nanpu , Chen Zhiqian , Tang Jianfeng 
Published: August 2019

Abstract
Grain refinement is an effective means to optimize the properties of the alloy. Al3Zr, Al3Sc and Al3(Zr,Sc) phases have attracted much attention as effective grain refiners for aluminum alloys, and their precipitation size will directly affect their interfacial strengthening effect with the matrix. In this paper, the first-principles method has been used to construct the Al/Al3Zr/Al double interface crystal model with different thicknesses of Al3Zr. The strengthening effect of the phase Al3Zr on the matrix during the precipitation growth process is described, and the optimal precipitation thickness of the strengthening phase Al3Zr is determined. By calculating the Griffith separation work and stress-strain curves of the interfaces between the refining phases with different thicknesses and the aluminum matrix, the change trend of the strengthening effect on the Al/Al3Zr/Al interface during Al3Zr precipitation growth is analyzed from the perspective of the combination of static and dynamic interface strength. Then the interfacial strengthening effect of the Sc-doped Al3(Zr,Sc) phase to Al matrix is analyzed. The electron density difference is used to analyze the interfacial bonding characteristics from the perspective of electronic bonding.
Synthesis of Poly (Butadiene –g–Styrene) Core-Shell Latex for Use in Cement Modifying
Authors: Wang Dong , Zhao Tingting , Zhao Wenjie 
Published: August 2019

Abstract
Polybutadiene–graft –polystyrene (PB-g -PS) latex with different ratios of polybutadiene to polystyrene were prepared via emulsion graft copolymerization method through grafting styrene onto polybutadiene latex using a redox initiator system. The PB macroradicals reacted with styrene to form graft copolymers. The effect of initiator concentration, reaction temperature, grafting monomer/polybutadiene weight ratios, and monomer dropping time on the conversion, grafting efficiency, degree of grafting, and mean particle diameter of graft copolymerization reaction were investigated. The grafting efficiency of PB-g-PS was determined by a solvent-extraction technique. Fourier transform infrared spectroscopy and nuclear magnetic resonance technique were used to confirm structure of the synthesized copolymers. Transmission election micrographs verified that the synthesized latex particles had a core –shell structure, which can be incorporated into cement as modifier.
Numerical and Analytical Comparison of Dispersion Relations of Weakly Modulated Fibonacci Sequence One-dimensional Photonic Crystals
Authors: Li Yan 
Published: August 2019

Abstract
The photonic band and the equifrequency surface of the weakly modulated one-dimensional Fibonacci sequence photonic crystal have been calculated by the finite difference time domain method and the analytical method, respectively, where the analytical method is based on the transfer matrix method. The results show that the equifrequency surface of the photonic crystals calculated by numerical method may lead to a completely wrong conclusion. Therefore, in the study of weakly modulated photonic crystals, the study of analytical methods is very necessary.
A Narrowband Mid-infrared Absorber with Tunable Peak Absorbance and Nearly Unchanged Peak Wavelength Using a Phase Changing Material
Authors: Ou Chunhui , Wang Jian , Hao Zhibiao , Wang Lai , Xiong Bing , Sun Changzheng , Han Yanjun , Li Hongtao , Yu Jiadong , Luo Yi 
Published: August 2019

Abstract
A narrowband mid-infrared (MIR) absorber with tunable peak absorbance and nearly unchanged peak wavelength is demonstrated using a phase changing material. The absorber is formed by an Au IR reflector, a SiO2 dielectric cavity and a 1D photonic crystal that consists of SiO2 and GeSbTe (GST), which is a phase-transition material and thus controls the absorbance without static power consumption. The dimension of the Au/SiO2/GST/SiO2 are optimized for high peak absorbance, high quality factor and low background absorbance. The as-fabricated absorber with amorphous GST shows the peak absorbance of 0.704 at 5.636μm, quality factor of 46.19, and background absorbance less than 0.02. Without significantly changing the absorption peak wavelength and background absorbance, the peak absorbance of the absorber can be tuned up to 4.47 dB by the phase transition of GST. Such tunable narrowband MIR absorber is a promising candidate for low-cost thermal emitter for infrared applications.
Theoretical Prediction and Experimental Research of the Thermal Properties of Fatty Acid Mixtures
Authors: Yan Quanying , Fan Qingzhu , Zhang Jing , Liu Chao , Wang Chenyu 
Published: August 2019

Abstract
The theoretical calculation formula was used to predict the phase transition temperature and latent heat of the binary mixtures. Phase transition temperature and latent heat were experimentally studied by differential scanning calorimeter and compared with theoretical and experimental values. It is proved that the theoretical calculation formula was feasible to predict the phase change temperature and latent heat of fatty acid mixtures. Capric acid, stearic acid, myristic acid, palmitic acid and lauric acid organic phase-change materials were mixed to prepare binary mixtures. The results showed that the experimental data of phase transition temperature and latent heat of the binary mixtures were in good agreement with the theoretical ones. The results provide a reference and basis for the theoretical prediction of phase transition temperature and latent heat of phase transition for fatty acid mixtures.
Preparation and Electro-thermal Properties of Low Voltage DC Driven Graphene Electro-thermal Film
Authors: Wang Shidong , Gu Baoshan , Sun Shiqing , Zou Weiwu , Yang Peiyan , Zhao Haoqi , Li Xin 
Published: August 2019

Abstract
Exfoliated graphene were prepared by supercritical carbon dioxide fluid stripping and electro-thermal film with graphite and exfoliated graphene ware prepared and then studied by SEM and Raman spectroscopy. The results show the graphene sheets are exfoliated from the graphite blocks with a size of 3-10μm after stripping. The graphene existed in sheet in the electro-thermal film while graphite was blocks, which caused the graphene oriented and the conductive network more abundant and effective. The power of graphene electro-thermal film reduced by 22.5% compared with graphite electro-thermal film to reach the same space temperature under 12V, and the film temperature decreased by 9.623 °C, the comprehensive heat transfer coefficient is 2.60×10-3 W·cm-2·°C-1, And the heating rate of the graphene electro-thermal film rapidly increase and the temperature rise time greatly decrease. The initial heating rate of graphene electro-thermal film is 19.3 times of that of the graphite electro-thermal film, and the temperature rise time decreased to 24.7%.
Inactivation of Cyanobacteria by Underwater Shock Wave
Authors: Liu Wen , Zhang Wanlin , Li Li , Wang Weiwei , Pan Kai , Wang Gongdao , Wang Ji , Wu Wei 
Published: August 2019

Abstract
A treatment of underwater shock wave was proposed to solve this problems which the harm caused by cyanobacteria blooms. Underwater shock wave technology has the features of energy saving, environmental protection, safe and efficient. The underwater shock wave technology effective performance for the removal of cyanobacteria was investigated. The results obtained from on-site algae water showed that the initial chlorophyll-a content of Taihu Lake wild algae is 216.22 μg/L, after applying with the optimum working conditions treatment, the chlorophyll-a of the treated group is only 3.84μg/L at the ninth day, while the concentration of chlorophyll-a was 209.87μg/L in control group after 9 days of culture, the average removal rate was 98.22%. The initial algal toxin level in the wild algae in Taihu Lake was 4.23 μg/L, after treatment with underwater shock wave, the concentration of algae toxin in the treatment group decrease below the limit of detection (0.1 μg/L) after 1 day of algae culture, meanwhile, the control group increased to 4.36 μg/L. The contents of TN, TP and COD in the treatment group were lower than the control group with the underwater shock wave treatment. The results indicated that the underwater shock wave cannot only inactivated the wild cyanobacteria, but also can improve water quality.
Band Gap Optimization for GHz Elastic Waves in Gold Phononic Crystals
Authors: Zhang Chi , Liu Qiang , Ouyang Zhengbiao 
Published: August 2019

Abstract
Elastic waves at GHz range have many interesting applications, such as microwave generation, hybrid-information processing and quantum routing. The phononic crystals (PhnCs) can help manipulate the propagation of elastic waves, due to their bandgap effect. In order to produce relatively broad phononic bandgap in the GHz range, here three types of PhnCs in gold are investigated. Phononic bandgaps are optimized in terms of tuning the shape and size of air holes. Results as provided by the finite element method show that the maximum of the gap ratio ~0.991 appears in the cross-shaped PhnCs. The proposed gold-based PhnCs may be useful for building optomechanical platform which can realize strong surface-plasmon-mechanical coupling.
Preparation and Ferroelectric Properties of Ba(1-x-y)CaxCe2y/3TiO3 Nanotubes
Authors: Chen Juntai , Zhou Qiqi , Liu Yang , Dong Youming , Ma Mengen , Deng Xiangyun 
Published: August 2019

Abstract
In this paper, the microstructure and ferroelectric properties of Ba(1-x-y)CaxCe2y/3TiO3 nanotubes were prepared by hydrothermal method using TiO2 nanotube as templates. Ba(1-x-y)CaxCe2y/3TiO3 nanotubes at different concentration of Ca(CH3COO)2•H2O and (CH3CO2)3Ce·xH2O were investigated. The experimental results show that increasing the concentration of (CH3CO2)3Ce·xH2O and Ca(CH3COO)2•H2O are beneficial to the transition of TiO2 nanotubes to Ba(1-x-y)CaxCe2y/3TiO3 nanotubes and improve ferroelectricity, and the results show that in the Ca(CH3COO)2•H2O, (CH3CO2)3Ce·xH2O doping concentration of 0.032mol/L,0.008mol/, respectively, the surface morphology of Ba(1-x-y)CaxCe2y/3TiO3 nanotubes is the best. Typical hysteresis loops with remanent polarization and coercive field are 0.33 μC/cm2, and 33 kV/cm, respectively.
Fibrous Orientation Effects on the Deformation and Stress of an Insect-like Flapping-wing Micro Aerial Vehicle Based on ACP
Authors: Shema Akther , Yu Chunjin , Wang Fang 
Published: August 2019

Abstract
This paper examines the effect of different orientation of composite material on the deformation and stress of dragonfly-like flapping-wing micro aerial vehicles (FWMAVs). After billions of years of evolution, insects employing flapping-wing tend to have excellent flight capabilities. To understand the bionic wings will be helpful to design high performance aircrafts. FEM analysis of flapping wing structure simulating dragonfly wings having three layers Epoxy carbon composite material and resin epoxy is glue for adhesive two layers. In the process, the flapping wing model was created in ANSYS Workbench ACP (pre), ACP (post) and then the loading of the flapping wing in each phase will be calculated. Finally, the graphs showing the changes of the maximum deformation displacement and maximum stress can be worked out. It can be known that for the first principle stress, -35° is the best performance because -35° stresses is lowest stress and +35° is the worst performance because this angle is the highest stress. For the second principle stress the -25° is the best performance because -25° have the lowest stress. For the third principle stress, -45° is the worst performance because -45° is the highest stress, +45° is the best performance because here stress is the lowest and 0° is the worst because here stress is the highest. The findings are helpful in answering why insect wings are so impeccable, thus providing possibility of improving the design of flapping wing aerial vehicles. This paper will found why insect wings are impeccable.
Sedimentary Characteristics and Source-sink Process of Fan Delta in Nantun Formation of Beixi Area in Baer Depression
Authors: Li Yue , Liu Chuntian , Feng Kexin , Qin Jia , Wang Jinkui 
Published: August 2019

Abstract
Fan delta is a very important oil and gas gathering place of continental faulted basin, to establish an accurate and reliable fan delta depositional model is of great value to predict dominant reservoir group. With the comprehensive application of core, earthquake and logging data, the typical fan delta depositional system developed in the Baer sag of the Nantun formation has been clearly defined by the fine depiction of the internal sedimentary units and phase marks of the fan. It can be subdivided into 3 subphases and 11 types of microfacies. The fan delta plain subfacies developed 3 kinds of microfacies, namely plain distributary channel microfacies, plain distributary channel microfacies, plain natural dyke microfacies. There are 6 types of microfacies developed in the fan delta front subfacies, namely, the main channel microfacies of the leading edge of the front, the microfacies of the subaqueous distributary channel in the front edge, the front edge mat microfacies, the sandstone microfacies of the estuarine dam, the sandstone microfacies of the far sand bar and the inter subaqueous microfacies of the leading edge. There are 2 kinds of microfacies in the delta facies, namely, the front delta siltstone microfacies and the front delta mudstone microfacies. The fan delta deposits in the Nantun formation of the Baer sag are mainly developed in the Beixi slope zone, the Huoduomoer tectonic belt, the Suderte tectonic belt, and so on, which are close to the steep slope of the basin margin or the control fault. According to the different characteristics, two sedimentary models of steep slope and steep slope are established.
Transversely Anisotropic Damage Characteristics of Loaded Rock under Freeze-thaw Cycles
Authors: Liu Xiangdong , Zhang Huimei 
Published: August 2019

Abstract
Flake metamorphic rocks and sedimentary rocks tend to show obvious transversely isotropic mechanical properties in deformation and strength because of the existence of weak structural surface or soft-hard interlayer structure. The rock in cold area is affected by load and freeze-thaw cycles, and the prevention and control of freeze-thaw disaster has become an urgent problem to be solved in the construction of cold area. Based on the strength of Rock Micro Element subjecting to Weibull random distribution and the macroscopic statistical damage model of rock, this paper used the transversely isotropic elastomer model to describe the damage evolution equation of freeze-thaw rocks in the whole process of the load deformation, and established the corresponding damage constitutive model. The results showed that this model more accurately describes the effect of freeze-thaw cycles on rock mechanical behavior, and had positive theoretical and practical significance for solving engineering problems in complex rock body.
Study on Characteristics of Ship Emissions from Surrounding China Seas
Authors: Wang Zheng , Liu Chunling , Zheng Wei , Peng Chuansheng , Liu Ying , Qin Cuihong 
Published: August 2019

Abstract
In order to analyse the characteristics of air pollutants emissions from coastal vessels in China, this study collects and analyses the static data and emission parameters of ships both at home and abroad based on the data of automatic identification system. Based on the actual navigation Data of ships, the paper also analyses the emission characteristics under the condition of five vessels including port, mooring, low speed and cruise in port, and statistics the emissions according to different sea areas, and gives the ship atmosphere of the three emission control areas In China Pollutant emissions. The results show that the SO2, NOX and PM10 produced in the vicinity of China’s coastal waters within a year are about 879,800 tons, 1,378,400 tons and 117,300 tons, respectively. Source of emission analysis shows that the host is the main source of emissions from the three main sources of emissions on the ship’s main engine, auxiliary engines and boilers. Spatial analysis of ship-borne pollutants shows that 90% of ship emissions occur within 96 nautical miles of the coastline to the baseline of the territorial sea.
A BP Neural Network Modeling Method Based on Global Error for the Hysteresis of Piezoelectric Actuator
Authors: Wang Yanyan , Guo Hai 
Published: August 2019

Abstract
Piezoelectric actuator (PZT) is used widely in nano positioning, nano measurement and nano mechanics. However, its hysteresis, creep and nonlinearity affect the positioning accuracy seriously, especially the hysteresis. The paper proposes a BP neural network modeling method based on global error to model the hysteresis of the PZT. The network contains input, hidden and output layers. Its training goal is based on global errors. And the network could adjust the connection weight of the network dynamically according to different inputs till the global errors reduce to the threshold. Experiments prove that the method could fit the hysteresis curves of the PZT well. And the training errors could be controlled under 0.05.
Indoor Position System Based on Improved TDOA Algorithm
Authors: Pan Dawei , Yu Yunhua 
Published: August 2019

Abstract
An indoor position system based on UWB modules is introduced in this paper. The time difference is obtained by the communication between the target node and the source node, and the time difference is sent to the upper computer to calculate the position of the target node with the improved TDOA algorithm and kalman filtering algorithm. The test shows that the system has the advantage of high precision and high stability.
Ion Distribution at Steel/Concrete Interface in Steel Reinforced CSA Concrete by Newly Updated Image Analysis Technique
Authors: Song Meimei , Wang Chuanlin 
Published: August 2019

Abstract
Calcium sulfoaluminate (CSA) cement is potential low-carbon cement; therefore investigation on ion exchange property at the steel/concrete interface is of great importance to understand the corrosion resistance and long-term durability properties of steel reinforced CSA concrete. Moreover, there is still a lack of standard procedure for quantitative imaging analysis in the study of cementitious materials so far. In this study, we developed an updated imaging analysis technique to investigate the atomic information in steel reinforced CSA concrete by using quantified elemental mappings. Microstructure of steel reinforced CSA concretes were characterized by SEM/EDX. The results indicated that there was less active ion distribution at the steel/concrete interface in CSA concrete than that for OPC concrete. Al/Ca ratio decreased over the interfacial zone gradually with ageing period of up to 1.5 years, but Al still dominated in the CSA concrete compared to the OPC concrete.
Assessment Model of Ecosystem Service Value Based on Environmental Kuznets Curve
Authors: Liu Yuchen , Deng Zihe , Lin Qian , Wang Lei 
Published: August 2019

Abstract
As more and more land is developed, the environment is being destroyed more and more seriously, and the country and people begin to pay more attention to environmental degradation. However, the value of ecosystem services and the cost of environmental degradation are not taken into account when land projects are developed, and the impact of decisions on the biosphere is often overlooked. The real economic cost is often negative. In order to measure the real cost-benefit, we established our own measurement cost-benefit ratio model based on the value of ecosystem services and the cost of environmental degradation. In the modeling process, we first measured and counted the economic output of the land project, and then calculated the cost of environmental degradation based on its economic output according to the Kuznets curve formula. The use of these models can ensure the timeliness and applicability of our conclusions. Finally, we calculate the ecosystem service value of the whole region through the ecosystem service value of unit area and conduct evaluation and sensitivity analysis. In addition, we use RSEI to analyze the environmental quality of each part, and finally determine whether it exceeds or falls below the critical point by comparing the total value of ecosystem services with the total value of ecosystem services not included. So we can get a specific ratio to determine whether its real cost-effectiveness is positive or negative.
Formation and Controlling Factors of Effective Weat-hered Crust Carbonate Reservoirs-taking the Yingmaili-Yaha Area of Tarim Basin as an Example
Authors: Wang Huanhuan 
Published: August 2019

Abstract
In recent years, the marine oil and gas exploration in China has made great progress and lots of high quality carbonate reservoirs in deep strata have been found. As one of the most important carbonate reservoirs, the weathered crust reservoir has taken much more attention. Especially in the Tabei area of Tarim Basin, plenty of hydrocarbon resources are stored in the weathered crust reservoir, which arouses lots of concerns at present. In the Yingmaili-Yaha area of Tabei, the main accumulation spaces of the Cam-brian-Ordovician weathered crust are dissolved pores, fractures and caverns, and these reservoirs have good physical properties, great thickness and large distribution range. Research shows that the formation of the reservoir in this area is restricted by factors such as early stage sedimentary facies, weathering and leaching, fractures created by the tectonic movement and associated denudation. The Weathering crust karstification and the tectonic disruption has greatly improved the nature of the accommodation spaces, as a result, in the Yingmaili-Yaha area, even buried in the depth of about 6000m, high porosity and permeability weathering crust reservoirs are still well preserved. There are many controlling factors, such as paleogeomorphology, tectonic subsidence and uplifting, weathering and leaching time, paleoclimate, etc, thus forming lots of dissolved pores, fractures and caverns, and they are mainly distributed in the depth of 150m under the weathering front, and it is up to 200m in local areas.
Protection of Materials from Space Radiation Environments on Spacecraft
Authors: Shen Zicai , Xia Yan , Liu Yuming , Ding Yigang , Zhao Chunqing 
Published: August 2019

Abstract
Spacecraft in orbit will encounter space radiation environments such as electron, proton, heavy ions, gamma ray, etc; and results in the space radiation effects such as single event effects, total ionizing dose effects, displacement damage effects, surface charging and discharging or electrostatic discharging, internal charging effects. So protection from space radiation should be given to the spacecraft. The protection principle and validity from space environments on spacecraft is introduced firstly, and then mass shielding material, ESD protection material, and radiation hardening functional material, were discussed. At last, some development directions on protection material from space radiation environments are proposed.
Dynamics Problem of Mode III Crack Subjected to Superimpose Uniform Loads
Authors: Wang Yuntao , Lü Nianchun , Cheng Jin 
Published: August 2019

Abstract
The problem of the mode III flaw under superimpose uniform loads was studied by the means of the theory of complex variable functions. By the ways, the problems studyed can be fast transformed into R-H issuess and K-S mixed boundary value issues. The expression of stresses, displacement and stress intensity factor were gained on the theory of the theory of analytical functions.