bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research on Influencing Factors of Unsafe Behavior of Prefabricated Building
Authors: Wang Xiaowen , Sun Yucheng , Liu Yan 
Published: August 2020

Abstract
There are obvious differences between the assembly construction method and the traditional cast-in-place construction. At present, the assembly construction technology and management standards have not been perfected in our country, and the acceleration of technology can create unparalleled cascades of benefits as well as new risks of catastrophe. Through a lot of literature research, this paper designs questionnaires including risk perception, convenience perception, managerial pressure, co-worker pressure, and judgement ability based on the theory of planned behavior, and conducts factor analysis on the collected data. Finally, based on the analysis results, corresponding management level factors, workers level factors and self-perception factors of unsafe behaviors in prefabricated buildings are proposed.
The Study of Intention to Apply Live Video Transmission System in Disaster Sites for Firefighters through UTAUT model
Authors: Chen Tsung-Yu , Chen Yi-Ching , Tsai Chia-Chou , Chou Chung-Chyi 
Published: August 2020

Abstract
With the rapid development of network technology, the live video transmission system (LVTS) has improved the work efficiency because of the visual communication combining both images and data. In order to strengthen the effectiveness of disaster prevention through instant communication, the Fire Department in Taiwan has used the “VVLINK” videoconferencing system to provide multi-functional online conferences, and even grasp on-site dynamic situation of disasters in the first time, and then giving order to the disaster relief site online. Here, a research about the application of LVTS system in disaster sites was carried out to study the intention for firefighters in Fire Bureau of Changhua County, Taiwan. In this study “behavioural intension (BI)” and “usage behaviour (UB)” on LVTS system are explored through the Integrated Technology Acceptance Model (UTAUT). In addition, moderate variables such as gender, age, experience and voluntary are needed to be considered. “Performance expectation (PE)”, “effort expectation (EE)” and “social influence (SI)” can affect BI to be very significant; BI and “facilitating conditions (FC)” can also affect UB. Questionnaire analysis was applied. The results show that PE, EE, and SI have a positive direct impact on BI, and BI also has a positive direct impact on UB. It was also found that the FC had a positive and direct impact on BI as well as SI impacting on UB. All the moderate variables have significant difference on each UTAUT categories.
Study on pollutant characteristics of different types of manure sludge drying condensate
Authors: Xuan Zhang , Hongguang Zhu , Yupeng Xu 
Published: August 2020

Abstract
In order to further study the characteristics of condensate contaminants generated during the drying of livestock manure and biogas residues, the three biogas residues were dried at different temperatures and at different time. The condensate produced in the experiment was collected and its pH, ammonia nitrogen and COD were measured. Exploring the effects of different temperatures and different times on the characteristics of condensate contaminants during the drying of manure sludge. And further comparing the characteristics of different types of biogas residue dry condensate. The results show that: the three biogas residue condensates are weakly alkaline; the three biogas residue condensates COD rises with the increase of drying temperature, the use of low temperature drying can reduce the organic content of the dry condensate; low temperature drying can significantly reduce Exhaust gas treatment load to prevent the loss of organic fertilizer efficiency; with the extension of the drying time, the NH3-N content of the dry condensate of pig manure and chicken manure biogas residues decreased, and the NH3-N content of the dry manure biogas residue dry condensate increased; comprehensive consideration of drying efficiency and drying for the characteristics of condensate. It is recommended that all three kinds of biogas residues be dried at 60°C at low temperature.
Human factors analysis of Kaohsiung 8′1 explosion accident based on HFACS-UP
Authors: Wei Zhen , Wu Le , Chen Chong 
Published: August 2020

Abstract
Human factor is one of the main causes of urban gas pipeline explosion accidents. In order to minimize the consequences of such accidents, it is crucial to distinguish the human factors. In the present study, The Human Factors Analysis and Classification System-Urban Pipeline (HFACS-UP) is established according to the characteristics of urban pipeline accidents. Then the HFACS-UP framework is used to identify the human factors of a pipeline explosion accident occurred in Kaohsiung, Taiwan. The results indicate that the routine violations, skill-based errors, intellectual limitations, technological environment, failure to correct problems, insufficient safety culture, organizational process vulnerability and insufficient government supervision are the main factors lead to the explosion accident. Finally, the prevention measures are proposed to ensure the safe operation of urban pipelines based on the analysis results.
Experimental investigation of turbulence characteristics in stirred tank with polymer as drag reducing agent using particle image velocimetry
Authors: Quan Qing , Chen Yiming , Gao Zhimin , Qi Xueyu , Wang Shouxi 
Published: August 2020

Abstract
The effect of polymer concentration on turbulence flow field was analyzed by particle image velocimetry inside a stirred tank. With the increment of polymer concentration, the velocity gradient in the radial direction increased and the TKE and EDR rapidly decreased in the impeller region, while the velocity gradient decreased in the axial direction and the TKE and EDR first increased and then decreased in the region close to the wall. Higher polymer concentration resulted in lower turbulence intensity both in the radial and axial velocity components attributing to the weakened and restrained fluctuation intensity of the long-chain in the drag reducer polymer.
Perfluorohexane Sulfonate Decomposition In a High Photon Flux UV/sulfite System: Kinetics and Influential factors
Authors: Gu Yurong , Zhu Jia , Dong Zijun , Zhang Xi 
Published: August 2020

Abstract
Hydrated electron (eaq
-) is a strong reductant, and is reported promising for recalcitrant organic pollutants decomposition. In this study, eaq
- based decomposition of one representative short chain perfluorinated compounds, perfluorohexane sulfonate (PFHxS) in a high photon flux UV/sulfite system was investigated. The observed rate constant (kobs) of PFHxS was 0.028 min-1, which was one order of magnitude faster than that in previously studied UV/iodide system. UV intensity played an important role in the decomposition, when UV intensity was adjusted from 25% I0 to 100% I0, kobs of PFHxS decomposition increased from 0.010 min-1 to 0.028 min-. PFHxS decomposition efficiency was greatly enhanced in alkaline solution compared to that in the acidic solution.
Mechanism of migration and settlement for temporary plugging ball in shale gas horizontal wells
Authors: Zhang Feng , Li Kuidong , Xiao Jialin , Liu Wei , Hu Yun 
Published: August 2020

Abstract
In order to determine the migration and settlement mechanism of temporary plugging balls in horizontal wells, the rules for distribution, migration and settlement of balls in different location were researched through calculation, coupling fracturing fluid and characteristics of movement based on CFD (computational fluid dynamics), DEM (discrete element method) and DDPM (dense discrete phase model), and the intensity, plane and spatial distribution of the microseismic events before and after ball-addition were analysed. The results showed that: First, the central flow core in the pipeline is the main migration carrier of the temporary plugging balls and proppants, low-viscosity liquid performs differences when inflowing at various perforation holes. The settlement and plugging in downstream cannot be effectively improved while the upstream without balls’ settlement. Second, due to the fluid resistance, the mean velocity of temporary plugging balls decreases and balls spread along the casing wall while the interaction force can be ignored. Under different displacement, the temporary plugging balls’ migration speed has a relatively stable value, the displacement of 5 m3/min is the critical value for the effective setting of temporary plugging balls. Thus, most of the micro-seismic events after ball-addition were concentrated in the upstream clusters, the impact scope of the micro-seismic events of 6-clusters is greater than that of 8-clusters perforation. After ball-addition in 6-clusters, the key effect is to improve the complexity of the microfracture network, while in 8-clusters to improve SRV (simulated reservoir volume) for the beginning first 4 clusters. So that is, increasing the number of clusters will lead to an inadequate microfracture length extension and only SRV (simulated reservoir volume) near the wellbore zone was improved.
Study on the culture and degradation characteristics of dominant phenol-degrading bacterium for coal chemical wastewater
Authors: Peng-sheng Zheng , Zhong-quan Guo , Yan Xiao 
Published: August 2020

Abstract
To culture dominant phenol-degrading bacterium for bioaugmentation treatment of coal chemical wastewater, 3 phenol-degrading bacterium such as PDB-1, PDB-2 and PDB-3 were enriched and screened from activated sludge in the coal gasification wastewater treatment plant. The culture conditions such as temperature, pH and additional carbon source were analyzed. At last, the degradation effects of raw water were investigated. Results indicated that PDB-2 was the best bacterial strain with the strongest phenol-degrading ability. The degradation rate was 96.6% in 24 h under the initial phenol concentration of 400mg/L. The degradation rates were respectively 89.5% and 96.1% in 24 h and 36h under the initial phenol concentration of 800mg/L. Under the initial phenol concentration of 400mg/L, the dominant phenol-degrading bacterium grew best with the temperature of 30°C and pH of 7∼7.5, and 100mg/L or 200mg/L addition of glucose could further increase the 24 h degradation rate. When the preprocessed coal gasification wastewater was used to acclimate PDB-2, the total phenol and COD concentration of raw water were 18.2 mg/L and 193 mg/L with the corresponding 48h degradation rate of 95.8% and 92.5%.
Preparation and Catalytic Property of Au-decorated Titanium Dioxide Dendritic Nanofibers
Authors: Du Juan , Wei Aili , Shen Lulu , Chen Song 
Published: August 2020

Abstract
To remove organic pollutants from industrial wastewater, the Au-decorated titanium dioxide dendritic nanofibers (Au-Ti DNFs) were synthesized through in situ decoration of gold (Au) nanoparticles on the titanium dioxide dendritic nanofibers (Ti DNFs). The electrospun Ti NFs were firstly prepared by sol-gel method combined with electrospinning technology, then in situ converted to Ti DNFs in the NaOH solution via a hydrothermal route, and finally treated in the solution of HAuCl4.4H2O to produce Au-DTi NFs. SEM and TEM analyses showed that the Au-Ti DNFs had the dendritic and fibrous morphology and consisted of a large number of Au-Ti nanowires. 4-Nitrophenol was used as the model organic material to test the catalytic performance of Au-Ti DNFs. The results showed that Au-Ti DNFs catalytically reduced 4-nitrphenol to 4-amonphenol and their catalytic performance was higher than that of Ti DNFs due to the decoration of Au nanoparticles.
Study on Adsorption-Desorption of Benzene in Soil
Authors: Sun Jing , Lin Guoqing , Henghua Zhu , Tang Xiaomeng , Zhang Lichun 
Published: August 2020

AbstractGroundwater near the Qilu petrochemical plant in Zibo City is polluted by oil for over thirty years, which seriously threaten the local ecological environment. The results of GC-MS analysis of water samples show that benzene was the most abundant and toxic organic pollutant. The adsorption-desorption behaviour of benzene in soil was studied through batch experiments. The results indicated that the adsorption amount of benzene in the local soil showed a trend of increasing first and then decreasing with the increasing of the initial concentration of benzene. There existed an optimal initial concentration of benzene in the adsorption experiments. The desorption concentration of benzene was proportional to the initial concentration of benzene. Particle size of the soil was inversely related to adsorption and desorption concentration of benzene. The soil with the average particle size of 0.08 mm had the largest adsorption capacity for benzene, which could reach 376.39 mg/kg. The results could provide a theoretical basis for the local groundwater remediation.
Effect of Combustible Gas Components on SNCR Reaction with Reducing Agent in Ceramic Kiln
Authors: Zeng Wenhao , Tang Zijun , Huang Jianhang , Tang Zhixiong 
Published: August 2020

Abstract
Selective non-catalytic reduction (SNCR) is a denitration method used in NOx process-control of ceramic kiln. In this study, the effect of combustion gas components (CO, H2, CH4) on NOx removal in the SNCR process was investigated, using ammonia and urea as reducing agent in a lab-scale experimental platform. The results showed that the addition of CO slightly promoted the NOx removal efficiency when ammonia was used as reducing agent, while when urea was used as reducing agent, the addition of CO inhibited the denitrification. The increase of H2 and CH4 addition ratio in the simulated flue gas reduced the de-NOx efficiency. With the same addition ratio, the effect of CH4 on the reduction of denitration efficiency was much more obvious than that of H2. When ammonia was used as reducing agent, the ammonia escape was much greater than that of urea.
Influence of flash evaporation on safety Characteristics of Liquid Hydrogen Leakage and Diffusion
Authors: Hu Yang , Zhao Huiping , Ma Yiwei , Xiong Yanyi 
Published: August 2020

Abstract
During the storage and transportation of liquid hydrogen, damage of pipeline or sealing failure of valve may cause liquid hydrogen leakage. The cryogenic and combustible hydrogen produced by the leakage are dangerous. Because the storage pressure is higher than atmospheric pressure, flash will occur in leakage accident, resulting in LH2 / H2 two-phase flow at the leakage port. In order to study the effect of flash evaporation on the hydrogen diffusion characteristics, the CFD method is used to simulate the liquid hydrogen leaking and diffusing process at different mass fractions of flash evaporation. The results show that the horizontal distance of combustible cloud diffusion is 15.6m when the liquid hydrogen leaking amount is 60L / min. When 14% liquid hydrogen flashes, the horizontal distance of hydrogen diffusion reaches 24.1m, and with the increase of flash evaporation, the horizontal distance increases significantly. With the increase of flash evaporation, the horizontal distance of cryogenic hazardous zone increased from 6.3m to over 9m. It can be concluded that flash evaporation has adverse influence on the safety after a liquid hydrogen leakage accident, which greatly increases the distance of combustible cloud dispersion and cryogenic hazardous areas.
Competitive adsorption characteristics of N2 and CH4 gas mixtures on coal and its geological significance
Authors: Xu Shuang , Wang Wei , Chen Xin , Li Yangbing , Fei Jingliang , Ma Litao , Du Linxuan 
Published: August 2020

Abstract
Coalbed methane (CBM) is an important unconventional natural gas resource and has achieved great advances in recent years. In this study, single and binary component adsorption experiments of N2 and CH4 on dry coal from eastern Yunnan and western Guizhou area were conducted on a high-pressure isothermal adsorption equipment to investigate the competitive adsorption characteristics of N2 and CH4. The results show that absolute adsorption capacity of methane is higher than that of nitrogen for coal samples in this area. Moreover, maximum mixture gas adsorption isotherms lie between the pure N2 isotherms and pure CH4 isotherms. There is an obvious increasing trend for PL as the content of nitrogen increases, it can be ruled out that critical desorption pressure increases along with the increasing nitrogen content in coal seam. This investigation is significative to understand CBM recovery processes considering N2 injection.
Effect of HVOF particle deposition angle on particle deposition behaviour
Authors: Zha Bailin , Jia Xudong , Wang Jinjin , Shi Yi’ang , Su Qingdong , Zhang Tianhao 
Published: August 2020

Abstract
Power particles are mainly in solid state prior to impact on substrates from high velocity oxy-fuel (HVOF) thermal spraying. The combination state of particles and substrate significantly affects the coating quality. Finite element analysis (FEA) models are developed to simulate the impingement process of solid particle impact on substrates under different deposition angles. This numerical study analyzes the deformation behavior of particles and the reason under different deposition angles, and the shear-instability– based method is applied to the particles. The particles are given the properties of widely used WC-Co powder for HVOF thermally sprayed coatings. The numerical results confirm that in the case of vertical deposition, the deposition behavior of particles is better than that of non-vertical deposition. In the case of non-vertical deposition, the equivalent plastic strain of the right part of the particle central axis is larger than that of the left part of the central axis, and decreases gradually in a clockwise direction. The flattening process of particles is mainly controlled by the horizontal drag force. When the normal velocity of particles exceeds the critical deposition velocity, the particles will appear adiabatic shear instability phenomenon, with the matrix to produce an effective combination.
Numerical Simulation of Reaction Efficiency of Vinyl Chloride Suspension Polymerization Reactor
Authors: Zhang Shuimu , Wang Jian 
Published: August 2020

Abstract
This paper establishes a mathematical method for calculating the polymerization process of industrial vinyl chloride suspension polymerization reactors. The polymerization rate, weight average molecular weight (WAMW), number average molecular weight (NAMW), monomer conversion rate and pressure are displayed throughout the reaction. Applying this model to existing experiment in the literature, the results are close. The final simulation results will be used to guide the industrial production of polyvinyl chloride (PVC).
Analysis of Anthocyanins in Different Parts of Michelia with High Performance Liquid Chromatography
Authors: Ma Zhiling , Tang Lizhu , Gao Xiaomin , Yan Chengming 
Published: August 2020

Abstract
In this paper, high-performance liquid chromatography was used to analyze the composition and content changes of anthocyanins in various parts of the ground in Michelia, such as flowers, leaves and stems. The results showed that its flower contained cyanidin and Petunidin, while the stem contained Pelargonidin and Peonidin, and no anthocyanins were detected in the leaves. The types of single anthocyanin components contained in different parts are different. It is intended to provide a reference for the cultivation and evaluation of new varieties of ornamental plants of Michelia.
Study on Mechanical Properties of Weakened Steel Frame Joints at Beam Ends
Authors: Ji Jing , Zhang Runbao , Li Zhihui , Xu Ming , Jiang Liangqin 
Published: August 2020

AbstractIn order to study the hysteretic properties of steel frame T-shaped weakened joints, 12 groups of steel frame weakened joints and 1 group of common joints are designed with the weakened form, the weakened diameter and the distance from the weakened center to the column end as the parameters. Based on simplified mechanical model and material constitutive relationship, the finite element model is established by ABAQUS software to analyze the hysteretic properties of the joint specimen. By comparing with the existing test results of the weakened joint, both have a good agreement, and the rationality of the finite element model is verified. The simulation analysis of the weakened joints of the beam webs is carried out in the further and the load-displacement hysteretic curves are extracted as well as skeleton curves and stress cloud diagram of the joints. The influence rules of the weakened form, weakened diameter and weakened distance from the center to the column end on the seismic performance of the joints are obtained, and the design suggestions for the weakened joints are put forward. These can lay a foundation for time-history analysis of the frame structure with this kind of joints.
Evaluation of bearing capacity of reinforced stone arch bridge based on dynamic load test
Authors: Hu Chuanwen , Luo Wenbo , Chen Shunchao 
Published: August 2020

Abstract
In order to evaluate the stress and working performance of a reinforced stone arch bridge, the load test of the bridge is carried out. Dynamic load test is used to test the inherent fundamental frequency, damping ratio and impact coefficient of the bridge through pulsation test and sports car test. Under the dynamic load, the first vertical natural vibration frequency of the bridge is 5.005, the damping ratio is 0.203, the second vertical natural vibration frequency of the bridge is 6.274, the damping ratio is 0.021, the tested strain impact coefficient is between 1.03 and 1.10, the measured vertical fundamental frequency is greater than the calculated fundamental frequency, and the overall stiffness of the bridge meets the design specification. The test results show that the reinforcement method of thickening the main arch ring has good application value, can effectively improve the service level of the old bridge and prolong the safety service life, and has obvious social and economic benefits.
Study on loading mode of upper arch Bridge under static load test
Authors: luo Wenbo , Hu Chuanwen , He Mao , Wang Lei , Wang Jianwei , Chen Shunchao 
Published: August 2020

Abstract
Bridge load test is a very important means to evaluate the structural performance, construction quality and bearing capacity of the completed bridge, among which static load test is a very important basis to judge the structural stiffness and bearing capacity of the bridge. However, the specification does not give detailed test method or suggestion for loading method of static load test of upper arch bridge. In this paper, based on the analysis results of field test data, a more reasonable loading method is obtained.
Data-driven Tracing Method of Overload of Transmission Network Equipment
Authors: Li Meng , Wu Wei , Lin Yi , Yan Tongyu , Huang Pingfa , Lin Shengyi 
Published: August 2020

Abstract
It is of great significance to the tracing of heavy load or overload (HOD) of power transmission network equipment for the precise investment and planning in power grid. The measurement system of power transmission network is increasingly accurate and intelligent, and a large amount of operation data was generated. Therefore, it is theoretically feasible for the tracing method based on big data is proposed for the HOD transmission network equipment. Firstly, the messy operation data generated by the power grid should be preprocessed, including data coding, cleaning and resampling. Secondly, estimation of the importance of independent variables of mutual information was solved out four characteristic quantities which have a great influence on HOD by game theory. Then, with the characteristic quantity as the label, the Fuzzy C-means (FCM) was used to cluster the HOD data into four categories, corresponding to four causes of HOD. Finally, an example is given to analyze the operation data of a city’s transmission network in 2019, which verifies the effectiveness and accuracy of the proposed method. Compared with the manual tracing method, the algorithm can greatly improve the efficiency.