bluuebunny/crossref_metadata_2025_split huggingface dataset:
Study on the Layout and Influence of Offshore Structures in Macao Waters of Pearl River Estuary
Authors: Xu Wei , Wang Hua , Liu Guozhen , Huang Pengfei , Ye Ronghui 
Published: November 2019

Abstract
The coastal area is the area where human activities are most frequent. Coastal waters provide rich resources for the development of human society. The current in coastal waters is affected by shoreline, buildings in water and tidal current. The scientific location of buildings in water is of great scientific and practical significance for the sustainable development and utilization of coastal zones. In this paper, the Jiu’ao Bay is taken as the object, and mathematical and physical models are used to simulate the influence of hydrodynamic force and water exchange capacity caused by different locations of intake. The simulation results show that after the construction of the water intake, the water flow is squeezed by the water intake, and the water flow is forced to deflect eastward, while the west side water flow is deflected to the south. The flow diversion of the rising tide is advanced, and the flow convergence of the falling tide is delayed. As a result, the water exchange capacity in Jiu’ao Bay is reduced. Compared with Scheme 1, the location of Scheme 2 is less hydrodynamic, so the impact is less.
Study on the Inventory of Air Pollutants in Ports of Beijing-Tianjin-Hebei Region
Authors: Zhang Fan 
Published: November 2019

Abstract
According to the 2014 national transportation statistics compilation, the throughput and port machinery classification data of the port-based cargo types in the Beijing-Tianjin-Hebei region in 2014 were obtained. Based on the relevant research results, the calculation methods and related parameters of port heavy trucks, other port machinery, unorganized emissions of particulate matter, and unorganized emissions of VOCs were determined. To calculate the list of atmospheric pollutants in the Beijing-Tianjin-Hebei regional port in 2014, The emissions of SO2, NOx, PM10, PM2.5, VOCs and CO from Tianjin Port, Qinhuangdao Port, Huanghua Port and Tangshan Port were 260.6t, 3784.5t, 2524.1t, 2376.4t, 986.6t and 3068.9t respectively. Combined with the overall planning and layout plan of the Beijing-Tianjin-Hebei Port, the GIS technology was used to grid the inventory data to obtain a spatialized list with a resolution of 3km×3km. To further study the differences in emissions of different pollutants in different ports and the distribution of air pollutant emissions in the port to laid a scientific data foundation.
Study on the Thermal Expansion Performance of Gypsum in the Application of Precision Casting
Authors: Zhang Ye , Zhang Jixiu , Miao Yuanchao , Duan Saihong 
Published: November 2019

Abstract
Gypsum is a very important cementitious material in gypsum-based precision casting. The thermal expansion characteristics of gypsum have great influence on the adjustment of gypsum type precision casting powder formula. In this paper, the thermal expansion properties of different gypsums such as β-gypsum, natural gypsum-based α-gypsum, desulfurization gypsum-based α-gypsum, and the influence of temperature, heating rate/heating mode on the thermal expansion properties of α-gypsum are studied, which can provide references for the application of gypsum in the precision casting.
Study of shear strength of silty clay under freeze-thaw cycle
Authors: Lv Yan , Wang Haoxu , Gu Chengke 
Published: November 2019

Abstract
Silty clay is a common subgrade soil with a wide distribution in northeast China. The construction in the seasonal frozen area of silty clay in northeast China has become the norm. In the engineering construction, the shear strength characteristics of silty clay under different water content, different freezing temperatures and different cycle times of freeze-thaw should be considered. Based on the study of remolded silty clay, cohesion and internal friction angle are used as the shear strength indexes, and the influence of water content, freezing temperature and cycle time of freeze-thaw on the shear strength is analyzed by combining with the Gray Theory. The results show that the grey correlation degree of water content, freezing temperature and cycle time of freeze-thaw to cohesion is 0.97, 0.47 and 0.47, and to internal friction angle is 0.95, 0.45, 0.47, the water content towards cohesion and internal friction angle are linear negative correlation, freezing temperature has a best valuable impact on the shear strength, cycle time of freeze-thaw towards cohesion is linear positive correlation, and has little relationship with the internal friction angle.
Evaluation of lead(II) biosorption kinetics and isotherms from aqueous solution with dry Myriophyllum spicatum powder
Authors: Yi Zhengji , Liu Jian , Liu Xing , Zeng Rongying , Long Jiumei 
Published: November 2019

Abstract
Lead as an important element used by mankind for years is highly toxic in water and regarded as a long-standing environmental contaminant. In our research, biouptake of lead(II) from simulated wastewater by Myriophyllum spicatum was examined via batch tests. Impacts of pH, adsorption time and initial Pb(II) level on its biosorption process were examined. The best pH favorable to Pb(II) adsorption was equal to 6. The Pb(II) biosorption reached equilibrium after 50 min. Langmuir and Freundlich adsorption isotherm models were used to analyze the adsorption data, indicating that the former could describe the Pb(II) biosorption with the maximum biosorption capacity of 34.13 mg/g. The Pb(II) biosorption kinetics was analyzed by pseudo-second-order and pseudo-first-order equations. It was found that Pb(II) biosorption may be described by pseudo-second-order kinetic equation. The results suggested that M. spicatum powder may be utilized as an efficient biosorbent to eliminate Pb(II) from aqueous effluent.
Analysis on Damage Mode of Armor-piercing Projectile to Soil Target
Authors: Zhang Yuling , Zhen Jianwei , Liu Guoqing 
Published: November 2019

Abstract
Aiming at the reliability problem of armor-piercing projectile acting on soil target, experimental research and numerical simulation were carried out. The damage modes of armor-piercing projectile to soil target under different conditions were analyzed, and the characteristics of metal jet penetrating soil were studied. The results indicate that, there is a problem of reliability of fuse action in penetrating soil targets, if the soil strength is enough, the projectile will immediately explode and form metal jet when it touches the soil, if the soil strength is insufficient, the armor-piercing projectile will penetrate the soil, when the reaction force is enough, the armor-piercing projectile will explode and form metal jet, otherwise the armor-piercing projectile cannot explode, but the projectile will cause penetration damage to the soil.
Study on Synthesis Process of Ni-Pt/γ-Al2O3 Catalyst for Biodiesel Production from Waste Oil
Authors: Miao Yu , Guizhou Gu , Yu Teng , Rong Yang , Xiaoyu Liu , Lidong Xu , Zheng Li 
Published: November 2019

Abstract
Ni-Pt/γ-Al2O3 catalyst was prepared by step impregnation method with waste oil as raw material and Ni-Pt/γ-Al2O3 as carrier. Results showed that the waste oil used by catalytic hydrogenation of Ni-Pt the best preparation technology of Al2O?3 catalyst for calcination temperature was 450 °C, the roasting time was 4 h, Ni/Pt ratio of 1:1, and the corresponding biological diesel oil production rate was 81.5%. A biodiesel yield of the regenerated catalyst was low and decreased with the increase of regeneration times. This process can improve the added value of gutter oil and provide experimental basis for the production of diesel distillate from waste oil.
Visualization Analysis for Aqueduct Researches Based on CiteSpace
Authors: Gong Li , Wang Zhonghui , Lu Yekun , Kang Chuntao 
Published: November 2019

Abstract
In order to learn the aqueduct researches situation in China, we analyze the published literature about aqueduct from 1988 to 2017 in the CNKI database, and process on the CiteSpace visual analysis software. The scientific knowledge maps are obtained to tease out the changes of the literature about aqueduct researches, the cooperation relationship between authors and the institutions, and the keywords about hot spots. They visually reflect the complex relationships among the knowledge groups of aqueduct researches, such as network, structure and crossover, and clarify the current research situation and development trend of aqueduct researches. This study indicates that there are relatively few research literature about aqueduct; The number of authors researching on aqueduct is large, but the number of prolific ones is relatively small. Meanwhile, the collaboration between authors is relatively dispersive, since it does not form close relation. The distribution of research institutions is centralized which is not beneficial to mutual cooperation between research institutions and research institutions. The analysis of keywords shows that the researches about aqueduct are mainly in the aspects of internal stress, external stress, structure and construction technology.
Study on the characteristics of compressive strength and hydration mechanism of high-water-content materials modified by furnace slag and silica fume
Authors: Zhang Lianwei , Liu Changwu , Wu Fan , Lu Yonghu , Zhou Xianliang 
Published: November 2019

Abstract
In order to reduce the economic cost of high-water-content materials used in mine filling and improve the resource utilization rate of furnace slag and silica fume, furnace slag and silica fume were mixed into high-water-content materials by the admixture method. The variation law of compressive strength, hydration mechanism and microstructure were analyzed. When the furnace slag content is 10%, the compressive strength of high-water-content materials modified with furnace slag is consistent with that of pure high-water-content materials. When the silica fume content is 10% and 20% respectively, the compressive strength of high-water-content materials modified with silica fume increases by 8.54% and 3.66% respectively compared with pure high-water-content materials. When the furnace slag content is 30%, SiO2 in slag snatches Ca2+ and OH—from the solution to form a large amount of c-s-h gel, and the insufficient Ca2+ greatly hinders the formation of AFt crystals. When the silica fume content is 40%, the diffraction peak of AFt crystals cannot be observed in the diffraction pattern, which further indicates that the content of AFt crystals is an important factor affecting the compressive strength of high-water-content materials. When the content of slag and silica fume is low, AFt crystals are mostly in fine needle shape, the overall structure is uniform and dense. When the content of furnace slag and silica fume is high, AFt crystals are mostly of coarse columnar shape, and the overlapping mode becomes sparse and chaotic, and the dense degree of structure is seriously reduced.
Optimization of the epoxy resin water dispersion for modification of the RAP cold recycled mixes
Authors: Liu Tingguo , Shi Jicun , Busel Aliaksey , Zhang Qing , Busel Dmitry , Veranko Uladzimir , Zankavich Vitali , Shang Bo , Li Zhongyu , Wang Junxiong , Yin Tingjun , Han Zhiyu 
Published: November 2019

Abstract
This article presents the results of studies to optimize the composition of water dispersion of epoxy resin for the modification of RAP cold recycled mixes. The resulting water dispersion is easily combined with the bitumen emulsion and can be easily applied in the preparation of cold mixes. This kind of modification will significantly improve their reliability and durability and to closer in magnitude to the properties of hot asphalt concrete widely used for the construct of road pavements. In order to improve the efficiency of the modification process, the process of emulsification of epoxy oligomers in the presence of nonionic surfactants and further application of the obtained dispersions as a component of bitumen emulsions used for the preparation of RAP cold recycled mixes is justified. This kind of integrated approach to the selection of the composition of water dispersion of epoxy resin provided a higher level of its interaction in the formation of elastic and viscous bonds of increased strength in the formation of the structure of composites based on asphalt, bitumen emulsions and cement.
Study on Rheological Properties of BRA Modified Asphalt
Authors: Zhou Zhihai 
Published: November 2019

Abstract
Different amounts of BRA modified asphalt was prepared and evaluated for road performance. The basic indexes of different BRA was studied, including: penetration, ductility, softening point and viscosity. The viscosity-temperature characteristics of BRA were studied by Brookfield rotational viscosity test. The high temperature and low temperature rheological properties of BRA was studied by dynamic shear rheological test (DSR) and low temperature bending beam rheological test (BBR). The results show that the penetration of asphalt modified by BRA is decreased, but the softening point and viscosity are improved. BRA could significantly improve the viscosity of asphalt and maintain good construction workability. The rutting factor of BRA is larger than matrix asphalt and asphalt cement. The PG high temperature grade of unaged BRA is higher than that of RTFOT aging. BRA will reduce the low temperature performance of asphalt binder, but it has little effect on asphalt cement.
Study on quantification method for aggregate gradation of discrete Cemented Sand Gravel and Rock
Authors: Feng Wei , Jia Jinsheng , Liu Zhongwei , Wang Yang 
Published: November 2019

Abstract
As a new damming technique, Cemented sand gravel and rock damming technique could fill the gap between the earth-rock dam and the concrete dam in material and improve the construction system. The largest characteristic of this material is that it directly adopts the aggregates in the engineering field and only aggregates with a particle size above 150 mm are screened. The aggregate gradation is discrete and fluctuating, so it is significant to study the methods of quantization and characterization of aggregate grading. Based on Fuller curve, this paper quantified the variation and dispersion of aggregate gradation via using similarity coefficient of aggregate gradation, average similarity coefficient, mean average similarity coefficient and standard deviation of similarity coefficient, which has provided significant guidance for the real practice. Relevant quantization methods not only assist to differentiate the grading boundary including the thinnest and roughest graded aggregate, but also master the grading changes and predict the dispersion degree of strength of Cemented sand gravel and rock from the dispersion degree of aggregate, which could provide a scientific reference for the mixing design of Cemented sand gravel and rock
Study on Test and Ratio Optimization of Waste Rock-Fly Ash Aggregate Filling Slurry
Authors: Yang Xiaobing , Li Litao , Gao Qian 
Published: November 2019

Abstract
To obtain the optimum proportion of fly ash alternative for preparing filling slurry instead of waste rock, the effect of fly ash dosage on the filling body strength is predicted by utilizing BP neural network model on the basis of experimenting the particle size distribution, filling body strength and slurry working characteristics of waste rock-fly ash binary aggregate system under various fly ash dosages. As the results revealed, the waste rock-fly ash binary mixture system attains the densest accumulation when the fly ash dosage is 30%. At this point, the compressive strengths at all ages reach the maximum, according to the BP neural network model predictions. The minimum cost for preparing filling slurry is obtained to be 121 yuan/m3 based on the cost optimization model. At this time, the fly ash dosage is 26%, the cementitious material consumption is 286 kg/m3, the slurry concentration is 81%, the 3d strength is 1.26 MPa, the 7d strength is 1.52 MPa, the 28d strength is 5 MPa, the expansion degree is 51.4 cm, and the bleeding rate 5.7%. Both the filling body strength and slurry fluidity conform to the requirements, while the fly ash dosage is almost identical to that obtained from the particle size distribution and filling body strength tests.
Determination of T-2 toxin by chemiluminescence enzyme immunoassay
Authors: Lei Shuijuan , Liu Renrong , Zhu Lixin , Jin Yu , Li Min , Qiu Xiaoyan 
Published: November 2019

Abstract
T-2 toxin is a mycotoxin that is harmful to humans and animals. Chemiluminescence enzyme-linked immunosorbent assay (CLEIA) was established for the detection of T-2 toxin. In this study, the antigen coated concentration, antibody dilution proportion, goat anti-mouse IgG-HRP dilution proportion, the concentration of organic solvents, pH value and ionic concentration of the buffer were optimized to obtain the best reaction condition. The experiment have drawn the following conclusions, the 50% inhibitory concentration (IC50) of CLEIA was 0.94ng/ml. The standard was added 1.25ng∼5ng to wheat flour and added 1ng∼5ng to corn flour. The recovery ratios were 83%∼87% and 86%∼107%, the relative standard deviations (RSD) were 3%∼10% and 2 %∼6%, respectively.
Effects of different rootstocks grafting on potassium absorption in post generations of Cyphomandra betacea seedlings
Authors: Liu Piao , Wang Xun , Liao Ming’an , Lin Lijin 
Published: November 2019

Abstract
The pot experiments were conducted to study the effects of Solanum nigrum, tomato and eggplant as rootstocks on potassium contents in post generations of Cyphomandra betacea seedlings. The results showed that the potassium content of grafted generations of S. nigrum as rootstock was significantly higher than that of ungrafted generations, which increased by 85%, 6.4%, 7.5% and 5.5%, respectively. The potassium content of each part of grafted generations of C. betacea seedling by tomato and eggplant rootstock was lower than that of ungrafted generations. The content of available phosphorus and potassium in soil after grafting treatment was significantly higher than that of control, which was 1.11 times and 1.13 times respectively. Therefore, grafting on rootstocks of S. nigrum was more conducive to potassium absorption in post generations of C. betacea seedling.
The selenium accumulation characteristics of grape seedlings
Authors: Liu Lei , Wang Ting , Sui Liyun , Liu Ji , Lin Lijin , Liao Ming’an 
Published: November 2019

Abstract
To study the selenium accumulation characteristics of fruit tree, different selenium concentrations (0.00, 0.05, 0.10, 0.25, 0.50, 1.00, 2.00 mg/L) were used on the grape seedlings, and the selenium accumulation characteristics of grape seedlings were studied by a pot experiment. With the increase of selenium concentration in culture medium, the biomass of grape seedlings had increase trend when the culture medium selenium was no more than 0.05 mg/L, and decreased when the culture medium selenium was exceeded than 0.05 mg/L. When the culture medium selenium was 0.05 mg/L, the biomass of grape seedlings got the maximum. For selenium content in plants, with the increase of selenium concentration in culture medium, the selenium contents in roots and shoots of grape seedlings increased. Therefore, lower selenium concentration in culture medium could promote the growth of grape seedlings, while higher selenium concentration inhibited, and grape seedlings had strong selenium uptake ability.
Synthesis and properties of the IA/AMPS copolymer
Authors: Liu Zhan , Yan Meifang , Liu Zhenfa , Li Na 
Published: November 2019

Abstract
Based on itaconic acid(IA) and 2-acrylamido-2-methyl propane sulfonic acid(AMPS) as raw material, the IA/AMPS copolymer was preparaed. The scale inhibition of copolymer was studied under different experimental conditions. The optimum conditions of synthesis of IA/AMPS were obtained: the raw material quality ratio was IA:AMPS=5:1; the addition amount of ammonium persulfate as the initiator was 5% of the total mass of the monomer; the polymerization temperature was 95°C; the time of epoxidation was 4 h. Under this condition, the scale inhibition rate on CaCO3 was 100% when the IA/AMPS copolymer was 10mg⋅L−1. The scale inhibition rate on Ca3(PO4)2 was 100% when the IA/AMPS copolymer was 30mg⋅L−1. The light transmittance of the supernatant after the dispersion of Fe2O3 was 25%, indicating that the copolymer obtained under this experimental condition has good scale inhibition and dispersion performance.
Extraction of Quercetin from Avocado Meal and Its Antioxidant Activity
Authors: Feng Xuehua , Tao Ali , Song Zurong 
Published: November 2019

Abstract
Response surface methodology (RSM) was used to optimize the extraction process of quercetin from pear meal and to investigate its antioxidant capacity. The solvent ratio, ultrasonic power and extraction time were taken as independent variables, and the percentage of quercetin was taken as dependent variable. Through multiple linear regression and binomial fitting of each level of independent variable, the better extraction process was selected by response surface methodology and predicted and analyzed. The antioxidant activity of quercetin was evaluated by scavenging 1.1-diphenylpicrylphenylhydrazine free radical (DPPH.) and reducing ability of iron ions (FRAP). The optimum extraction process was obtained as follows: the ratio of liquid to material was 35 mL/g, the ultrasonic power was 550 W, and the extraction time was 30 min. The content of quercetin was 1.585%. Quercetin in avocado meal has strong DPPH scavenging and iron ion reduction ability. When the concentration is 30 mg/mL, DPPH scavenging rate reaches 70%, and iron ion reduction ability almost equals 6 mmol/L FeSO4 concentration, and has a dose-effect relationship.
Study on the best extraction technology of total flavonoids from Piper sarmentosum Roxb. leaves and evaluation of antioxidant activity
Authors: Wei Changbin , Li Jiaxu , Ma Zhiling , Qiao Jian , Zhao Weifeng , Liu Yuge 
Published: November 2019

Abstract
This paper investigated the best extraction process of total flavonoids from Piper sarmentosum Roxb. leaves. The optimal extraction solvent was first determined to be ethanol, and then the effects of ethanol concentration, extraction temperature, extraction time and the ratio of liquid to solid on the extraction yield of total flavonoids were determined by single factor method. Based on the above experiments, the orthogonal experimental design of three factors and three levels was established. The best extraction conditions of total flavonoids from Piper sarmentosum Roxb. leaves were concluded: extraction time 1.5h, liquid-solid ratio 175:1, ethanol concentration 75%, extraction time 1.5h, and the effect of solid-liquid ratio was greater than that of ethanol concentration, and the effect of ethanol concentration was greater than that of time. Furthermore, the antioxidant properties of total flavonoids were also determined from P. sarmentosum leaves in the regions of Suixi, Lianjiang, and Cunjin based on the DPPH, FRAP and MCC methods.
Study on the Metabolism of Sesamin to Ethanol and the Preparation of Sesamin Microcapsules
Authors: Ren Xiue , Zeng Shuyi , Xie Xiuxiu , Zhu Kemin , Chen Xiuhua 
Published: November 2019

Abstract
Hydroxyl radicals were obtained by simulating ethanol metabolism in vitro. The absorbance of sesamin was measured by reacting with sesamin solutions of different concentrations. The ability of sesamin sample to scavenge hydroxyl radicals decreased with the increase of dilution ratio in a certain range. A comparative experiment between sesamin and water was designed to verify that sesamin has a significant promoting effect on alcohol dehydrogenase (ADH). The results showed that sesamin could promote the metabolism of ethanol. It indicated that the sesamin can dispel alcohol and protect the liver. In addition, the sesamin was encapsulated by the coacervation method to optimize the preparation method of sesamin microcapsules, which laid a foundation for the practical application of sesamin.