bluuebunny/crossref_metadata_2025_split huggingface dataset:
Comparison of FEA for Different Type Element Models of Open Thin-Walled Member
Authors: Xie Yonglan , Qi Hu , Lin Bing , Zhang Qingyu 
Published: December 2019

Abstract
Open thin-walled beam is widely used in civil engineering. The open-walled section model is significantly different from closed section model because the torsional stiffness is small. In order to select an appropriate analytical model for the open-walled section member, three different type element models (beam element model, shell element model and solid element model) for open-walled section members are adopted in ABAQUS/Standard and the low-frequency cyclic loading is used in the analysis process in this paper. The hysteretic curves and skeleton curves of the different element model are obtained using above method, and the bearing capacity, stiffness and the computation time are compared. The analysis results show that the results of three type element models are in good agreement, and the computational efficiency of the three type element models varies significant differences. Hence, it can be concluded that the accuracy of computation results can be guaranteed using those three type element models, and the beam element model has the highest computational efficiency.
Study on Technology of Hydraulic Cutting Seam of Ultra-high Pressure with Strip Predrilling
Authors: Wang Xiaopeng 
Published: December 2019

Abstract
It is well known that the most fundamental means of gas management is gas extraction, the most difficult problem of gas extraction is low permeability of coal seam. Hydraulic cutting seam technology in recent years in uncovering coal, eliminate outburst danger has made great progress, therefore, to carry out the hydraulic cutting seam technology in the coal seam gas extraction from aspects of strengthening research is of great significance. Hydraulic slotting make around borehole in the coal gas by one-way two-way radial flow into radial and axial flow, based on the perturbation of the slot width, average single-hole gas from coal extraction from scalar, extraction radius of investigation, analysis of the hydraulic cutting seam technology and drilling data of extraction technology, the average single-hole extraction is obtained by 3 times.
Synthesis and Photophysical Properties of Aromatic Fused Ring Small Molecule Acceptor Materials Based on Two-dimensional indacenodithiazole for Organic Solar Cells
Authors: Yuan Gui-Zhou , Chang Zheng-Feng , Wang Jin-Liang 
Published: December 2019

Abstract
A new two-dimensional conjugated core unit 2DIDTz was synthesized based on indacenodithiazole with thiophene side chain. Then, a linear two-dimensional conjugated small molecule acceptor material, namely IDTzIID, based on 2DIDTz as core unit and (E)-1,1’-bis(2-ethylhexyl)-[3,3’-biindolinylidene]-2,2’-dione (IID) as end-groups was designed and synthesized through Still coupling reaction. There is a strong intermolecular charge transfer (ICT) between the IID and 2DIDTz. The structure and purity of the IDTzIID target compound was examined by 1H NMR. The IDTzIID showed good solvent properties in organic solvents. The IDTzIID showed wide and broad absorption with a band gap of 1.63 eV which can be matched with polymer donor materials for advanced organic solar cells.
Determination of continuous miner matching property for different geological conditions
Authors: Zhang Zhendong 
Published: December 2019

Abstract
In order to find a common method to match different geological conditions for continuous miner, fuzzy synthetic evaluation method is used to find the influence factors of continuous miner matching attribute. A total of twenty-one impact factors were found, and the structures and membership functions of these impact factors were established. The judgment matrix is constructed to determine the weight of each influencing factor based on statistical data, research results, and expert experience. Comprehensive evaluation model is established based on multi-level and multi-factor, then the integrated assessment value for different geological conditions are calculated, it is used to judge how well the continuous miner matches the geological conditions. This method is used in four field examples, compared with experts evaluation results, the two results are basically the same, so this theoretical approach is effective.
Fermentation of coffee beans with inoculation of bacillus subtilis and its impact on coffee sensory quality
Authors: Muzaifa M , Hasni D , Febriani  , Patria A , Abubakar A 
Published: December 2019

Abstract
The aim of this research was to study the coffee fermentation with inoculation of Bacillus subtilis isolated from civet (Paradoxorus hermaphroditus) as starter culture. The quality of coffee was evaluated by sensory quality (cup test). Two treatments were carried out: control/coffee non-inoculated starter culture (treatment F) and coffee inoculated with a Bacillus subtilis starter culture (treatment G). The fermentations were conducted for 48 h in triplicate. A inoculation of Bacillus subtilis as a starter culture cause a decrease in pH and increase in total titratable acidity of coffee fermentation solution. A panel of five trained coffee testers (Q-grader from Gayo Cupper’s Team) evaluated the samples. Ten sensorial attributes analyzed were fragrance/aroma, flavor, aftertaste, acidity, body, uniformity, balance, sweetness, cleanliness and overall. The result showed that the use of Bacillus subtilis starter culture improved quality of coffee fermentation. The aroma, flavour, aftertaste, body, balance and overall were increased. The cupping score total of coffee increased from 82.83 to 84.33. Metabolites analysis should be further investigated to confirm this result, especially organic acids compound.
Ruellia tuberosa L Anthocyanin extract as a pH sensitive substance
Authors: Safitri E , Afifah N , Khairi  , Lelifajri  , Nazaruddin  , Susilawati  , Sani N D 
Published: December 2019

Abstract
Anthocyanin from the flower Ruelila tuberosa L was successfully extracted by maceration using methanol. The total extract obtained was 19.22% with a concentration of 1.503 mg/L correspondingly. Retention time was analyzed using Thin Layer Chromatography and an Rf value of 0.43 was achieved. The analytical determination of functional groups was conducted using FTIR. The sensitivity of anthocyanin towards phosphate buffer pH is 0.222 at the range of pH 6 - 8 with R2 = 0.996 at maximum wavelength of 635 nm. On the other hand, its sensitivity towards citrate buffer is 0.022 at pH range 6 - 8 with a linearity of R2 = 0.999 at 625 nm maximum wavelength. The anthocyanin showed good in sensitivity and dynamic range in 0.1 M Phosphate buffer solution.
Indigenous knowledge of postnatal mother care using plants by acehnese
Authors: Zumaidar  , Saudah  , Rasnovi S , Harnelly E 
Published: December 2019

Abstract
Acehnese is one of ethnic of seven others (Gayo, Alas, Aneuk Jamee, Kluet, Singkil, Tamiang, Simeulu) who are in Aceh Province. Indigenous knowledge is a cultural heritage that can function as a conservation effort on biological resources. Postnatal mother care is one of the cultures of the Acehnese people. The aim of this research is to obtain information about postnatal mother care by the Acehnese. The method was Participatory Rural Appraisal (PRA) and observation techniques by purposive respondents (midwives (makblien), postnatal mothers, and mothers aged ⩾45 y). The data werecollected in six districts of Aceh Province (Banda Aceh, Aceh Besar, Pidie, Pidie Jaya, Bireun, and Aceh Jaya). The results showed that there were three to seven treatments in postnatal mother care, including body massage, herbal remedies for stomach appliances, hot stone (tőetbatee), fog treatment (salee), herb body scrub (param), bathing herb, and herb pills. The herb pillswere the most popular treatment and used many plants than the others. Otherwise, fog treatment wasnot popular in postnatal mother care. Aceh Besar district could be predicted to conserve local knowledge and medicinal plant than the others.
Surface water quality analysis and monitoring in Aceh Jaya district, Indonesia
Authors: Saiful  , Gani A , Ulim A 
Published: December 2019

Abstract
Nowadays, changes in the quality of surface water are becoming a serious problem to support clean water for the community. Aceh Jaya district as abundant natural resources that need to be processed and utilized, such as gold mining, agriculture, palm oil mills, and others. These activities can provide economic added value and also decrease the quality of the environment, such as changes in the quality of surface water. Surface water quality analysis has been studied to determine the different ion concentrations in the waters on the river Kr. Teunom and the river Kr. Ligan of Aceh Jaya regency. The results of the analysis of the water quality of the river show were physically the water quality of the river Kr. Teunom and Kr. Ligands are still following quality standards. Based on chemical parameters, the water quality of the river Kr. Teunom and Kr. Ligands, in general, are found in a low level of heavy metals such as Hg, Mn, Pb, As, Cd, and Cr in water. Cyanide levels in all samples of the river water are following the quality standard PPRI No. 82 of 2001 Class I and regulation of the Minister of Health Number: 492/Menkes/Per/IV/2010 concerning drinking water quality requirements. The presence of mercury ions in all river water must be a concern because mercury can accumulate in the tissues of aquatic organisms for a long time.
Thermal comfort and thermal adaptive behaviours in office buildings: A case study in Chongqing, China
Authors: Liu Jing , Wang Juan 
Published: December 2019

Abstract
A field study on adaptive behaviours for thermal comfort was performed in office building in Chongqing, China, from June to August, in which a total of 341 valid datasets were collected for further analysis. The results showed that although the separated air-conditioners were in use during working hours, the mean indoor air temperature during summer time was 27.78 °C, which was not with the summer thermal comfort zones specified in ASHRAE 55 standard. However, 93.5% of subjects regarded surrounding thermal environment was comfortable as a result of actively utilizing adaptive actions comprising technical (e.g. turning on air-conditioners, ceiling fan, etc.) and personal (e.g. having cold drinks, adding clothes, etc.) aspects. Air-conditioners was the most popular environmental control in summer. People would like to operate several environmental strategies simultaneously to alleviate thermal discomfort. The clothing insulation values of occupants drops to 0.4clo from 0.6clo in response to the indoor air temperature changing from 22°C to 32°C. The findings in this investigation are benefit for understanding of the interaction between occupants and ambient thermal environment and providing guidance on building energy efficiency.
Application of Field Survey and Graphic Language in Cultural Relics Building——Taking Liuzi Temple as an Example
Authors: Tong Shuyuan , Zhu Yafeng , Li Zhe 
Published: December 2019

Abstract
This article is a comprehensive and in-depth study of the shape and cultural connotation of cultural relics to achieve the protection and utilization of cultural relics. Using modern measurement techniques and advanced equipment, such as laser range finder and electronic theodolite, traditional measurement methods such as leveling surveying and detailing surveying are used for Liuzi Temple to obtain a large amount of actual data. At the same time, the stone carvings, textures and murals of the Liuzi Temple were investigated through close-range photography. In addition, through computer-aided data processing, it is transformed into a graphical form to deeply analyze the Liuzi Temple, providing a reference for the basic data mapping of cultural relics.
The case study of carbon emission in building construction process
Authors: Wu Wenling , Sun Pengcheng , Zhou Hui 
Published: December 2019

Abstract
Construction management in China has embraced a new practice encompassing the evaluation criteria of green construction. Thus, carbon dioxide (CO2) emissions produced during the construction period should not be overlooked anymore. A quota based CO2 emission calculation method was established. A commercial building and a school building, as two cases were studied. It’s shown that the unit CO2 emission for the two buildings’ construction process are 11.5 kgCO2/m2, and 11.6 kgCO2/m2, respectively. The CO2 emissions for earthwork, foundation work, masonry, concrete work, reinforcement work, formwork, decoration work and measurement work during construction were calculated. The results showed that foundation work and measurement work emitted the most CO2, contributing more than 50% CO2 emission, following by reinforcement work and concrete work. Formwork and masonry work emitted very little CO2. The CO2 emission of different machines were also studied, and the results show that the top 10 machines can take up about 90% of the total CO2 emission. Tower crane, electric welding machine, drilling rig, pile driver, truck, excavator and concrete pump are some of the most CO2 emission machines. These results could help construction managers identify low carbon construction methods and machines in order to maximize the carbon reduction opportunity during the construction stage.
Experimental study on consolidation characteristics of collapsing soil under different dry densities
Authors: Wang Jiani , Han Ruting , Zhang Xiaoming 
Published: December 2019

Abstract
The occurrence and development of collapsed hills in southern China are significantly affected by soil properties and consolidation characteristics. Three different dry densities were set up in the study. The four-layer soil was subjected to indoor one-dimensional consolidation test, in order to study the consolidation characteristics. The results show that the soil consolidation properties of different layers are different under different dry densities. Under the same load pressure, the four-layer soil’s pore ratio decrease with the increase of dry density; no matter how the dry density changes, the topsoil has a minimum pore ratio as the load increases. The maximum relative deformation rate occurs at the load pressure is 200 Kpa, the overall trend is the inverted “v” trend; the trend of compression coefficient of every treated soil sample is the same as the compression index, and the maximum value is the topsoil when the dry density is 1.40g/cm3; 1.40 g/cm3 of topsoil is high compressive soil, most of the rest are medium and low compressive soil. In this paper, from the consolidation characteristics of each soil layers under different dry densities reveal the mechanism of collapsing, which provides scientific basis for the prevention and control of collapse.
Analysis of settlement of existing buildings caused by unreasonable design of foundation
Authors: Tong Jianxing , Sun Xunhai , Jia Ning , Dang Wenyuan , Li Zhao 
Published: December 2019

Abstract
As for the settlement accidents of existing buildings, people pay more attention to the construction quality than the rationality of foundation design. This paper analyzes and discusses the problem of excessive settlement of existing buildings caused by unreasonable design based on three typical engineering cases. The conclusion is that as for the upper filled soil and lower soft soil foundation, the heavy tamping method is not suitable without auxiliary measures if the foundation settlement is strictly controlled; cement-soil mixing pile method is not suitable for high-rise buildings based on soft soil foundation; the foundation design should be based on deformation control when high compressibility soil layer exists, the pile body should penetrate the main compression deformation layer, and the pile end should fall on the good bearing stratum when using pile foundation or rigid pile composite foundation.
Construction Time-Cost Optimization of River Dredging Project in Cold Region Based on NSGA-II Algorithm
Authors: Feng Xiaohua 
Published: December 2019

Abstract
The construction of water conservancy projects is increasingly restricted by non-technical factors such as climate, environment and society, so it is particularly important to optimize it to improve the benefits of construction enterprises. Taking a river dredging project in cold region as an example, this paper uses NSGA-II algorithm to carry out multi-objective optimization of the construction time-cost, and uses MATLAB software to compile the construction optimization program of dredging project. Finally, the optimal combination of construction time and cost is obtained. The results show that the optimization results are in line with the actual situation of the project and save about 10% of the investment for the project. The method in this paper can provide useful reference for the optimization control of the construction progress of the actual project.
Analysis of the influence of subway entrance excavation on tunnel and adjacent buildings
Authors: Shi Junjie , Liu Junyan , Wu Yongzhen , Liu Yong 
Published: December 2019

Abstract
With the rapid development of urban subway transit construction, the construction of subway entrance and exit accessory structure in densely populated areas and near buildings is gradually increasing. Based on the open-cut foundation pit project at the entrance and exit of subway R3 line in Jinan city, this paper adopted MADIS GTS/NX 3D finite element analysis software to conduct finite element analysis on the connection tunnel and adjacent buildings by subway entrance and exit foundation pit excavation, and analyzed the displacement change trend of foundation pit excavation on the underground tunnel and building. The results show that the horizontal displacement of the connection area between the tunnel and the foundation pit is small, while the vertical displacement of the tunnel is relatively large, with a maximum value of 3.58mm. The settlement at the corner of the building adjacent to the foundation pit is relatively large, and the maximum settlement value is 3.03mm. It is in good agreement with the measured data and meets the requirement of deformation control. This study provides reference for the foundation pit engineering of subway entrance and exit of similar adjacent buildings.
Analysis of drivers’ visual characteristics in expressway tunnels with different radii
Authors: Pan Binghong , Wang Ye 
Published: December 2019

Abstract
The aim of this study is to analyse drivers’ visual characteristics in expressway tunnels with different radii by driving simulation experiments. This paper used forum driving simulation device, eye-tracker (SMI ETG™) and UC-win/Road to establish tunnel models with different radii for drivers’ visual characteristics analysis. Critical parameters indicating visual characteristics in the process of driving were sufficiently analysed and discussed. The results showed that there was an indispensable relationship between tunnel radius and eye movement.
Static Analysis of Factory Structures in the Reactor Device Area in a Nuclear Power Plant
Authors: Shao Qingwu , Fan Yibo , Qi Xiaohai , Bai Yanqiang 
Published: December 2019

Abstract
To inspect the static response of the factory structures in reactor device area in a nuclear power plant in design and construction stage, a numeral model of the structures is set and the effect of different combinations of dead load, live load, wind load, seismic action and temperature effect are considered. It is considered that the combination of dead load, live load and seismic action has the control action and the spallation target factory is the most unfavorable part.
Overall Tensioning Construction Technology of Main Beam of PC Plate Stiffened Beam Suspension Bridge
Authors: Yang Minghu , Liu Yuancai , Liu Yang 
Published: December 2019

Abstract
In the construction of the main beam of the PC plate type stiffening beam suspension bridge, the problem of tensioning construction of super-long prestressed steel bundles, combined with the Moon Bay Bridge with the main span of 465m, introduces the whole process of prestressed steel beam piercing and tensioning of the main beam. And the problems existing in the tension construction were analyzed. The construction of the Moon Bay Bridge was successfully completed, and its construction method can provide reference for similar bridge construction, which has certain reference significance.
Effect of Joint stiffness on Elastoplastic behavior of Cold-formed thin-walled Steel frames
Authors: Zhang Qi , Cheng Zhihui 
Published: December 2019

Abstract
In this paper, the first-order elastic analysis and second-order elastic analysis of cold-formed thin-wall steel frame (shelf) in practical engineering are carried out by using ANSYS and SAP2000 modeling analysis software, and the influence of semi-rigidity and second-order effect of joints on its overall performance is analyzed. At the same time, on this basis, the static elastic-plastic analysis of the shelf is carried out, and through the comparative analysis of the structural influence coefficient and displacement magnification coefficient of the shelf, the seismic performance of three kinds of beam-column connections (rigid connection, semi-rigid connection, hinged joint) is evaluated. And the structural influence coefficient of the shelf is put forward innovatively.
Set Pair Analysis based on Similar Forecast model of Civil car ownership
Authors: Wei Sun , Renteng Yuan , Shuaijie Su , Zhongyu Wang 
Published: December 2019

Abstract
It shows the important meaning that the accurate prediction of civil car ownership. The most important factor of civil car ownership are gotten from set pair analysis and correlation coefficient. Set pair analysis method can be used to quantificationally compute the similarity between main physics vectors from the view of identical, different and opposite sides. According to the weighted average of relative membership degree, obtain the set pair analysis based on similarity forecast model of civil car ownership, named SPA-SF. The forecast result of civil car ownership of 2015-2017 show that SPA-SF has certain application value in the prediction of civil car ownership.
Numerical Simulation and Experimental Study on the Anti-explosion Characteristics of Cavity Structure
Authors: Wei Liu 
Published: December 2019

Abstract
In order to study the anti-explosion effect of 500*500*200mm (length*width*height) cavity, the corresponding numerical simulation was carried out. It was found that the explosion suppression cavity has a good inhibitory effect on the explosion flame. The simulation results were verified by a field comparison test between the cavity and the straight pipe. It was found that the P1-P2 shock wave peak overpressure suppression rate was -8.11% in the straight pipe, and the F1-F2 flame suppression rate was -25.87%. After the cavity is coupled, the peak overpressure suppression rate of the shock wave becomes 17.12%, and the flame suppression rate becomes 40.85%. Compared with the straight pipe, the shock wave overpressure suppression rate of the cavity is increased by 25.23%, and the flame suppression rate is increased by 66.72%. Through numerical simulation and corresponding experiments, it is found that the cavity of 500*500*200mm (length*width*height) has better suppression effect on gas explosion. And the cavity wave elimination is a structural explosion suppression method, which can effectively suppress the gas explosion and its secondary explosion disaster.