bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analysis and Research on Wind Energy Utilization in Wind Field of Urban Buildings
Authors: Su Qiaoling 
Published: November 2019

Abstract
With the concentration of urban population and the development of construction technology, more and more high-rise buildings with irregular shapes and different heights have been built. These buildings have a greater impact on the surrounding wind field.[1] And the turbulent strong wind field between urban high-rise buildings also brings many inconveniences to the life of the surrounding residents. The purpose of this study is to discuss the utilization value of wind energy in turbulent strong wind field by analyzing the wind field between simulated urban high-rise buildings and to explore the possibility of installing wind energy collectors in appropriate locations and to turn waste into treasure. This study also discusses the possibility of wind energy utilization and value. At the same time, through the grid division of the wind field area, the wind field situation is simulated and other factors are considered comprehensively, it is possible to find a proper position of wind energy utilization. The results show that the wind speed distribution of high-rise buildings has a higher wind speed in the corridor between buildings. And for a single building, the wind speed at the middle is higher than that on the ground and the top. This provides the possibility of collecting and utilizing wind energy among buildings.
Practice and Effect of Fine Development in High Water Cut Stage of An Oilfield
Authors: Ji Guangpeng 
Published: November 2019

Abstract
In order to improve the development effect of An oil field Oilfield in high water cut stage, the author has adopted the method of fine reservoir characteristics description, fine injection-production system adjustment, fine injection-production structure adjustment and further studied on the reservoir development characteristics and channel sand body sedimentary model, remaining oil type and potential, single sand body tapping potential. The results show that, based on the correct understanding of the characteristics of reservoir sedimentation, using the favorable timing of encryption and carrying out the adjustment of injection and production system to determine methods of improving relationship of injection-production in different types of sand bodies and improve the control degree of water flooding. By studying on injection-production adjustment of different area, Well patterns and sand bodies, the matching adjustment of the two well patterns is realized, and three kinds of planimetric connectivity and longitudinal “345” subdivision boundaries are determined. Using the technology of “five directions” tapping potential and fine development, the oil field decline has been effectively controlled and the development effect has been improved.
A Speech Denoising Algorithm Based on Harmonic Regeneration
Authors: Zengyuan Liu , Anming Dong 
Published: November 2019

Abstract
Single channel speech enhancement in noisy environments is studied in this paper. Traditional speech enhancement methods that based on short time spectral analysis frequently introduce harmonic distortion due to imprecise noise spectral estimation. A kind of technology which is called harmonic regeneration is used to overcome the defect of traditional speech enhancement methods, and damaged harmonics are restored. Firstly, a non-linear operation is used on the harmonic distorted signal to generate an artificial signal which contains all of harmonics of pure speech signal. Secondly, the artificial signal is used to correct the traditional noise reduction gain function, and the purpose of harmonic reservation is reached. Theoretical analysis, objective and subjective results indicate that the harmonic regeneration algorithm can improve speech quality dramatically. The computational complexity of the new algorithm is rather low, and it can be easily implemented in real time applications.
Optimization of revised universal soil loss equation of ecological forest lands in the hilly areas of the eastern Zhejiang Province
Authors: Wang Ran , Chen Jijiang , Li Gang , Zou Yefeng , Lu Fangchun , Zhou Xijiong 
Published: November 2019

Abstract
The soil erosion prediction model is an effective means to predict soil erosion and soil and water conservation planning. Based on the analysis of soil erosion law of typical economic forest slopes in the study area, it is of great significance to establish a prediction model for soil loss in typical economic forests in the study area. In this study, five typical economic forest slope runoff plots in the study area were used as research objects. The runoff and sediment data under natural rainfall conditions were used to optimize the universal soil loss equation. The prediction equation for soil and water loss in the hilly areas of the eastern Zhejiang Province was proposed: A= 0.004·R1.594·K·LS·C·P. The Nash efficiency coefficients of the simulation results are above 0.70, and the coefficients of determination are above 0.80.
Streptomycin Pharmaceutical Wastewater affects the T-AOC and CAT activity of Zebrafish
Authors: Wu Pengpeng , Wang Yaxue , Shen Hong-Yan 
Published: November 2019

Abstract
Streptomycin is increasingly being used to treat human diseases. Recently, its toxic effects on aquatic organisms have attracted global attention. The aim of this study was to investigate the toxic effects of streptomycin on zebrafish by measuring T-AOC and CAT activity. Zebrafish were exposed to four different volume concentrations of streptomycin wastewater and their T-AOC and CAT activities were measured at 3, 6, 9, 12 and 15 days. T-AOC activity shows an inverted “N” trend, and T-AOC activity reached the maximum (1.90U·mgprot−1) on the 12th days. Furthermore, The CAT activity shows “M” tendency, and concentrations of streptomycin can affect CAT activity. Streptomycin wastewater induced oxidative stress in Zebrafish muscle tissue.
Sloshing effect of back pressure fluctuation of oil filling pipe in oil tank inheavy sea
Authors: Yuan SJ , Zhu K B , Yang Y , Zhen Y Y , Zhu ZQ 
Published: November 2019

Abstract
During the loading operation of the oil tanker, the oil sloshing is caused by the movement of the carrier liquid and the filling of the liquid cargo. The sloshing force acts on the filling pipe and affects the filling process of the tanker. The main aim of this paper is to back pressure fluctuation of oil filling pipe in oil tank. A more reasonable three-dimensional model was established, and the VOF (volume-of-fluid) model was combined to simulated the change of back pressure. This paper firstly compares the sloshing loads caused by tank loading and movement. The results show that the effect of tank loading on the back pressure of the filling pipe is less than the impact of the tank movement. On this basis, the article further studies the sloshing effect of the tank movement. The test simulated different amplitude of tank to compare and analyze the back pressure variation characteristics of the filling. The results of simulation show that during the tank loading operation, the sloshing pressure load becomes larger as the motion period decreases.
Preliminary Geomagnetic Study of the Hot Spring Area in Rokan Hulu, Riau - Indonesia
Authors: Islami Nur , Irianti Mitri 
Published: November 2019

Abstract
Hot spring is commonly found in volcanic mountain areas. But in Rokan Hulu, a hot spring is found at a distance of about 15 km from the hills of Bukit Barisan. This study aims to conduct a physical study especially preliminary geomagnetic study of the Hot Spring in terms of the magnetic properties and topography of the area. As much as 26 points of the geomagnetic survey were conducted and used in this study. Some data corrections were applied to the data for making the reliable data interpretation. The results showed that there was a weakening of the magnetic field in the zone around Hot Spring itself and the low magnetic value was extended to the Southeast zone of Hot Spring. Topography shows the zone in this southeast has a height difference of fewer than 10 meters from the location of the Hot Spring. Allegedly this weak Magnetic zone is the source of heat from the Hot Spring.
Design of corneal cross-linking system: with real-time positioning of pupil position
Authors: Zheng Tianli , Yao Kang , Zhu Hailong , Fu Weiwei 
Published: November 2019

Abstract
This paper presents a design of a corneal cross-linking instrument with the function of tracking and locating the central position of the pupil in real time. According to the application requirements, based on the principle of uniform light of compound eye lens, the optical projection system of the corneal crosslinking instrument with the diameter of the treatment spot being 9mm and the uniformity being greater than 90% was designed. And put forward a kind of the pupil localization algorithm, the acquisition of the pupil image gray processing and calculate the histogram, according to the characters of histogram adaptively to take out the appropriate threshold binarization, again after the binarization of image contour tracking, get accurate boundary, the outline of the final vote based on the sliding arc length increment method to determine the pupil center and radius. Experimental results show that the corneal cross-linking system designed in this paper can not only accurately project the treatment of light spot, but also accurately track the central position of the pupil of the human eye.
Rapid Determination of Resveratrol and Piceid in Wine by High-Performance Liquid Chromatography
Authors: Wei Changbin , Qiao Jian , Ma Zhiling 
Published: November 2019

Abstract
In this study, a solid-phase extraction column dedicated to the detection of resveratrol was directly used for purification after adjusting the pH of the sample, without resorting to a new method for sample extraction. The compounds cis-resveratrol, trans-resveratrol, cis-piceid, and trans-piceid were thus detected in wine simultaneously by high-performance liquid chromatography (HPLC). This method offers rapid and easy operation and involves low consumption of organic solvents, paving the way for efficient determination of the variety and other parameters of grapes used in wine samples..
Research progress of 3D printing materials in stomatology
Authors: Wang Fang 
Published: November 2019

Abstract
3D printing technology is gradually used in the field of stomatology, such as repair, planting, orthodontics and other disciplines. 3D printing process mainly includes four aspects: oral scanning, Digital design, 3D printing materials and 3D printing technology and equipment. The properties of 3D printing materials are the key factors affecting the effect of 3D printing. This paper reviews the research and development of 3D printing materials in stomatology at home and abroad in recent years and prospects the future development of 3D printing materials in that field.
HPLC fingerprinting and pattern recognition of Brazilian green propolis and Chinese propolis
Authors: Zhang Chumei , Liu Meijuan , Liang Zeyu , Yin Guanglign , Li Kunping 
Published: November 2019

Abstract
In order to improve the quality control method for propolis, HPLC fingerprinting and pattern recognition of 12 batches of Brazilian green propolis and 12 batches of Chinese propolis were carried out. HPLC fingerprinting was performed on a C18 column (250 mm × 4.6 mm, 5μm) using gradient elution with methanol-water (containing 0.2% formic acid) as the mobile phase. Similarity analysis was executed on similarity evaluation system for chromatographic fingerprint of TCM (2012A). Pattern recognition was performed by SIMCA-P 13.0 software. As a result, as for the two groups of propolis samples, 21 common peaks were calibrated and 11 of them were identified as chlorogenic acid, caffeic acid, isochlorogenic acid B, isochlorogenic acid C, quercetin, kaempferol, apigenin, pinocembrin, caffeic acid phenylethyl ester, galangin and artepillin C. The similarity of the fingerprint profiles of the tested Brazilian propolis is more than 0.92, and that of the tested Chinese propolis is more than 0.91. However, the two groups of fingerprints’ similarity are from 0.523 to 0.693. The results of PCA and OPLS-DA showed that chemical profiles of the tested Brazilian green propolis were different from those of Chinese propolis. A set of compounds, namely, artepillin C, chlorogenic acid, pinocembrin, isochlorogenic acid B and caffeic acid phenylethyl ester can act as difference marker of the two groups of propolis. Moreover, HPLC fingerprint combined with pattern recognition could be developed into one new method for quality control of propolis.
Research progress of the correlation between porcine Insulin-like growth factor 1 (IGF-I) and growth
Authors: Li Jiajun , Zhang Feiyan , Pan Kangcheng , Ni Xueqin , Yang Miao 
Published: November 2019

Abstract
Insulin-like growth factor 1 (IGF-I) is an important factor which plays the roles in regulating animal growth, development and metabolism. IGF-I also called somatomedin C (SM - C) mainly mediate growth hormone that plays the roles of promoting growth and is a kind of polypeptide regulating cell proliferation and differentiation. The paper review influences of IGFBPS, SNPs of porcine IGF-I gene, IGF-I signaling pathway and feed level on IGF-I, moreover, the correlation between porcine insulin-like growth factor IGF-I and growth..
Hang-off Analysis on Deepwater DST String Evacuation in Typhoon Condition
Authors: Liu Kang , Chen Guoming , Zhu Gaogeng , Dai Ziliang 
Published: November 2019

Abstract
A Drill-stem tested (DST) string system requires relatively longer time for full retrieval, and evacuation during typhoon is an important event in deepwater testing. The hang-off DST string system has a high risk as it experiences strong load due to ocean currents and multi-DOF motion of the floating platform. In this paper, a multi-tube model of DST string system that considers multi-point constraints is presented. Hang-off dynamic analysis, platform heading analysis, and evacuation window analysis are conducted. The results show the stress of the DST string system increase dramatically at top. The translational response of the floating platform has a great influence on the safety of the DST string system. The evacuation window is large in the downstream direction and is infeasible in the upstream direction. The operational performance of the DST string system during hang-off evacuation can be improved when driven in a smaller angle with current and orient the platform heading to reduce heave motion.
Effect of Sorting by a Hydrocyclone on Denitrification Performance of Activated Sludge
Authors: Xu Jiaping , Wang Hualin 
Published: November 2019

Abstract
Denitrification performance is an important indicator of the denitrification process in wastewater treatment. A lateral experiment was carried out on the campus wastewater treatment plants (WWTPs) in East China University of Science and Technology (ECUST) by using a SBR process equipped with a hydrocyclone. The results showed that the hydrocyclone in the SBR process was able to break activated sludge (AS) flocs into smaller flocs because of the rotation and revolution. At the same time, organic carbon sources such as polysaccharides and proteins were released, which supplemented the carbon source of the biochemical pool and improved the denitrification performance. After hydrocyclone treatment, the denitrification performance of sludge flocs increased by more than 50%, and the denitrification rate increased by 20.39%. Under continuous operating conditions, the average denitrification performance increased by 6.43%.
Experimental study on treatment of copper Ions in water by circulating electric-flocculation
Authors: Zhang Zhijie , Wang Quan , Xu Linlin , Chen Yong 
Published: November 2019

Abstract
This study is to change the treatment method of electric-flocculation technology, and the water to be treated enters the electrolysis tank in the form of circulation. Comparison of efficiency and energy consumption by circulating electric-flocculation and ordinary electric-flocculation. Explore the feasibility and energy consumption of the cyclic electric-flocculation method. It is found that the common electric-flocculation method and the cyclic electric-flocculation method have the same removal effect when the copper ion concentration is high, and the effect of voltage on the removal effect is very small; when the copper ion concentration is low, the ordinary electric-flocculation method has better removal effect than the cyclic type. The effect of the removal is good, the voltage has little effect on the removal effect of the common electric-flocculation method, and the effect on the circulation type is greatly affected; as the voltage rises, the limit of the copper ion concentration which is different between the removal effect of the ordinary electric-flocculation method and the circulation type is lowered; Under the same conditions, the energy consumption of ordinary electric-flocculation is always higher than that of the circulating type.
Research on “Three Sealing and One Grouting” Sealing Technology
Authors: Houquan Zhou , Qianqian Ma 
Published: November 2019

Abstract
Taking the 3314 transportation roadway of Wangpo Coal Mine as the research background, the stress and strain characteristics of the roadway after support were studied by FLAC3D numerical simulation. It is determined that the reasonable sealing depth is not less than 15m, and then the “three sealing and one grouting” sealing technique is proposed on the basis of the “two sealing and one grouting” methods, and the two sealing methods are compared and analyzed. The results show that the total average gas concentration and the maximum average gas concentration of the “three sealing and one grouting” sealing technique are 9.5% and 16.5% higher than the “two sealing and one grouting” respectively, and the gas concentration of the borehole after 70 days of drainage is still up to 40%. The “three sealing and one grouting” sealing technique can effectively improve the efficiency of gas drainage.
Synthesis and characterization of a magnetite (Fe3O4) nanofiltration membrane
Authors: Yang Zi , Rui Xiaobo 
Published: November 2019

Abstract
Meso-porous magnetite membranes have been synthesized by dip-coating iron oxide dispersion on ∼2 mm thick α-Al2O3 supports, followed by nitrogen-environment thermal processing. Both gas and water permeabilities of magnetite membranes were investigated. At room temperature, the nitrogen permeance was 3×10−8, which increased to 3×10−7 at 400°C, but decreased to 9×10−8 at 500°C (still higher than room temperature). The argon permeance at corresponding temperature was slightly lower than nitrogen permeance. 0.001mol/L NaCl was used as feed solution for dead-end filtration test. Experimental result indicated the mechanical permeance of magnetite membrane was 5.5×10−16 m, and the maximum salt rejection was 44% at transmembrane pressure of 0.35 MPa. From the perspective of thermal stability, a magnetite membrane was immersed in 60°C deionized (DI) water for a week, and there was no change in thickness according to ellipsometry analysis. Meanwhile, it was found that the membrane was chemically stable in base solution, which is expected for Fe3O4. However, the membrane thickness increased in nitric acid solution at pH 5.0, which was tentatively ascribed to oxidation of Fe3O4 to Fe2O3.
Study on the Correlation between Microorganism and Quality Formation of Pu’ er Tea during Fermentation
Authors: Wang Bin 
Published: November 2019

Abstract
Pu’ er tea is a solid-state fermented tea by microorganisms, and its fermentation can not be separated from the role of microorganisms. The dynamic changes of microorganisms in the fermentation process of Pu’ er tea have an important effect on the quality of Pu’ er tea. In this paper, the correlation between microorganism activity and its metabolites and the flavor quality of Pu’ er tea during the fermentation process of its fermentation is studied by analyzing the changes of microorganisms in the process of Pu’ er tea fermentation at various stages, which has provided a scientific theoretical guidance for the fermentation process of Pu’ er tea.
The Research Progress in On-Chip Mode (De)multiplexer
Authors: Zezhi WU 
Published: November 2019

Abstract
With the increasing integration of communication devices and the demand for communication capacity, the methods to increase bandwidth and transmission capacity have attracted lots of attentions. As a new multiplexing dimension, mode division multiplexing (MDM) can effectively improve transmission capacity, in which different modes are utilized for data transmission. In this paper, we investigate the recent progress in on-chip mode (de)multiplexer, which is the key technology to realize mode (de)multiplexing. Firstly, several traditional on-chip mode (de)multiplexers are introduced, including mode (de)multiplexers based on Multi-Mode Interference (MMI), Adiabatic Coupler, Asymmetric Y-Junction, Asymmetry Directional Coupler (ADC) and Micro-ring Resonator (MMR), respectively. Secondly, hybrid (de)multiplexers combining MDM with Polarization Division Multiplexing (PDM) or Wavelength Division Multiplexing (WDM) are discussed. Finally, this paper looks forward to the development prospects of on-chip mode multiplexing technology.
Experimental investigation into perceived air quality and sick building syndrome of stratum ventilation under heating mode
Authors: Cheng Fanghui , Tian Xue , Li Bozheng , Qi Bing , Cheng Yong 
Published: November 2019

Abstract
Stratum ventilation was able to provide satisfactory thermal sensation under heating mode, but its performance on perceived air quality and SBS (sick building syndrome) was still unknown. This study objectively measured indoor CO2 concentration and subjectively surveyed human responses to perceived air quality and SBS symptoms in a stratum-ventilated classroom under the heating mode. Three cases with different supply air velocities and temperatures were designed. Twenty-three subjects were recruited to attend this study. The results showed that indoor CO2 concentration under the three cases were all below 900 ppm and the contaminant removal effectiveness could be up to 1.9, indicating good indoor air quality. With proper designs of supply air velocity and temperature, the perceived air was fresh, and the perceived air quality was acceptable. The percentage of the subjects having SBS symptoms were below 20%. Therefore, stratum ventilation could bring satisfactory perceived air quality with few SBS symptoms under the heating mode.