bluuebunny/crossref_metadata_2025_split huggingface dataset:
Study on Pyrolytic Mechanism of Composite Solid Propellant Based on Meso Hot Spot Model
Authors: Zhao Jiuling 
Published: September 2020

Abstract
The heat decompose mechanism of HTPB propellant was discussed in micro-structure. A meso-hotspot physical model was established combining chemical kinetics, heat transfer, and AP interface evolving. The proceeding of Heat Decompose of HTPB propellant was simulated. The results show that simulation results were consistent with experimental results. The nature of heat decompose processing of HTPB propellant was discovered.
Study on Stability of Detection System for the Foreign Matter on the Surface of Analgesic Pump Drug Capsule
Authors: Wang Dongfeng , Wang Yongsheng , Xu Rui , Su Jianxiu 
Published: September 2020

Abstract
A tiny material point and foreign body on the storage bag of an analgesic pump will have a bad influence in clinical use. Therefore, in the production, the surface of the analgesic pump storage bag is tested and effectively removed. There are points and foreign objects are very important steps. In this paper, the stability of the foreign body detection system for the surface of 100 ML analgesic pump storage bag was studied. Experiments show that when N=8, 9, 11, that is, 100ML analgesic pump storage bag is connected with regular octagon, regular pentagonal, positive elliptical, the side length meets the design goal. However, since the time for detecting a single 100ML analgesic pump reservoir at N=8 was less than that for N=9, 11. Therefore, the detection of the 100ML analgesic pump storage bag by N=8 is in line with the production requirements. It provides an experimental reference for the efficiency and quality requirements of analgesia pumps in production.
Preparation and Ferroelectric Properties of Ca-doped BaTiO3 Nanotubes
Authors: Ma Mengen , Chen Juntai , Xu Chengshi , Li Huan , Deng Xiangyun 
Published: September 2020

Abstract
In order to explore the microstructures and ferroelectric properties of the Ca-doped BaTiO3 nanotubes, anodic oxidation method was used to generate TiO2 nanotubes. As a template to TiO2 nanotubes, hydrothermal synthesis method was used to prepare the Ca-doped BaTiO3 nanotubes. The microstructures and ferroelectric properties of the Ca-doped BaTiO3 nanotubes arrays, which had gained under different concentrations of calcium hydroxide, was measured and analyzed by scanning electron microscopy(SEM), X-ray diffraction instrument and ferroelectric analyzer respectively. The experiments show that with the increase of Ca(OH)2 concentration, TiO2 nanotubes can be transformed into Ba(1-x)CaxTiO3 nanotubes, and the crystallinity is improved. The Ca(OH)2 doping amount can improve the ferroelectric properties of Ba(1-x)CaxTiO3. When the Ca(OH)2 doping amount is 12%, residual polarization strength of the Ba(1-x)CaxTiO3 nanotubes is up to 1.32 µC/cm2 and coercive field can reach 3.37 kV/cm.
Synthesis of GO/Au/Ag Nanocomposite with Excellent Surface Enhanced Raman Scattering Effect
Authors: Yang Yongqiang , Wang Ling , Wang Qinsheng , Zhang Yan 
Published: September 2020

Abstract
In this work, a nanocomposite (GO/Au/Ag) containing graphene oxide (GO) and Au/Ag nanoparticles was fabricated by in situ reduction for improved manipulation of their SERS effect. The uniform dispersion of Au/Ag nanoparticles were successfully generated on GO. Rhodamine 6G (R6G) as a Raman probe was used to investigate the SERS effect. Owing to the synergistic effect of the high localized surface plasmon resonance of Au/Ag, and chemical enhancement of GOs, the Raman intensities of R6G on GO/Au/Ag is several times as high as that on Au/Ag or GO/Au. GO/Au/Ag nanocomposites showed excellent Raman enhancement and appeared to be a kind of valuable material with potential application in SERS detection.
Study of Precast Concrete under Different Curing Conditions
Authors: Zhang Jiayang , Lu Guozhong , Guo Zhenlei 
Published: September 2020

Abstract
The strength and durability of precast concrete under different curing conditions were studied from the actual production of precast reinforced concrete member. The results showed that the early strength of concrete at room temperature for 24h, standard steaming for 12h and constant temperature steaming for 12h could all meet the concrete form removal requirements, but the concrete strength by constant temperature steaming for 7d, 28h was lower than room temperature curing and standard steaming. The durability of concrete in steam curing was lower than that in room temperature.
Effect and Mechanism of Coral Powder on the Rheological Properties of Cementitious Materials
Authors: Cao Yin , Wang Ling , Wu Hao , Wang Zhendi , Yao Yan 
Published: September 2020

Abstract
To study the effect and mechanism of micro coral powder on the flow behavior of fresh cement paste, the fluidity and rheological parameters of cement paste with fine coral powder of different dosages were investigated. The influence mechanism of coral powder on rheological properties was investigated by testing the water demand, the adsorption behavior and the zeta potential. Results show that with the increasing dosage of coral powder, the fluidity of the cement paste decreases and the torque of cement paste increases at the same rotation speed. The derived yield stress and plastic viscosity increase with the increasing dosage of coral powder. Because micro coral powder has higher volume and area than cement with the same mass, the water demand ratio of coral powder is very high, which is one of the reasons for the fluidity drop with the coral powder content. With the same dosage of polycarboxylate superplasticizer (PCE), the adsorption amount and the adsorption ratio of PCE by blended micro coral powder are much higher than that of cement particles. Therefore, compared to cement paste without PCE, the fluidity of cement paste with PCE decreased more significantly at the same coral powder content. In addition, competitive adsorption of Ca2+ between coral and cement particles reduces the positive charge density on the surface of cement particles, causing the decrease of the adsorption capacity of cement particles for PCE, thus affecting its rheological properties.
Study on the Development of Settlement Spatial Form of Famous Historical and Cultural Villages in Mentougou District of Beijing
Authors: Gao Chenglin 
Published: September 2020

Abstract
As the earliest batch of villages that are awarded as “famous Chinese historical and. cultural villages” by the Ministry of Construction and the State Administration of Cultural Heritage, these villages in Mentougou District are pioneers and representatives of famous historical and cultural villages in Beijing. This paper selects Lingshui village in Mentougou District, Beijing as the research object, taking the evolution of settlement spatial form, the construction system and the internal planning as the research points. Then, by analyzing the evolution law of traditional settlement form and the combination relation of spatial model under the natural form, so as to connect the layout, sequence, basic organizational form and network characteristics of each node. In this way, to highlight the overall planning and leading role of management, thus promoting the systematization and standardization of conservation planning, regional system as well as constructional development of famous historical and cultural villages in Beijing.
Preparation and Photocatalytic Activity of TiO2 Film with High Exposure {001} Crystalline Surface
Authors: Yuan Chunhua , Yang Huimin 
Published: September 2020

Abstract
TiO2 films with exposed {001} crystal surface were prepared by hydrothermal method with 10 mm * 20 mm * 0.15 mm titanium sheet as titanium source and substrate and HF as shape control agent. The films were characterized by (XRD), (SEM) and (UV-VIS). The results showed that the TiO2 films with high exposure {001} crystal surface could be obtained by using 0.01 mol/L HF, 11:5 mixture of water and isopropanol as solvent, hydrothermal reaction temperature of 180°C, reaction time of 3H and calcination at 450°C for 2h. In this paper, methylene blue was used as probe and xenon lamp was used as light source to study the photocatalytic activity of TiO2 film.
Research on the Condition Evaluation Index of Distribution Network Equipment and Its Application
Authors: Yang Mikai , Hu Hanqing , Liu Xianyong , Han Lin 
Published: September 2020

Abstract
The current researches on investment decision of projects of power grid construction are feasibility studies or post-evaluation of single power grid construction projects. This paper mainly considers two types of index: abnormal state technical indexes and environmental indexes. During studying the investment demand of distribution network, firstly the operation state evaluation model of distribution network is formed to evaluate the equipment state, and then the investment demand is analyzed based on the results of the equipment state evaluation.
The Very-High-Cycle Fatigue Properties of Carbon Fiber Composite under Three-Point Bending
Authors: Ouyang Na , Chen Xuan , Chen Chao , Cui Wenbin 
Published: September 2020

Abstract
This paper starts from the need for an improved testing system of carbon fiber reinforced plastic composites (CFRP) under three-point-bending to investigate its properties under very high cycle fatigue. An improved testing system for composite material under three-point-bending very-high-cycle fatigue has been thus established. It was found that there is no traditional fatigue limit of carbon fiber composite under very high cycle loading conditions, and the CFRP ultra-high-cycle fatigue specimen exhibits three failure morphology, namely matrix damage at the intersection of fiber bundles, matrix voids near parallel sections of fiber bundles, and penetration of the matrix.
Pulse Couple Neural Network Based on Visual Perception
Authors: Pan Gai , Kong Xiangyong 
Published: September 2020

Abstract
The traditional pulse coupled neural network model only considers the spatial position information between neurons, but neglects sensitivity of human visual perception to luminance change, especially when the brightness is high or low, the visual sensitivity of the human eye is relatively low, and in a certain range of brightness, the visual sensitivity of the human eye is relatively high, so it is easy to have false segmentation. In order to solve this problem of the traditional pulse coupled neural network model, this paper redescribes the connection weights between neurons by using the human eye luminance weight factor, and obtains the new pulse coupled neural network model based on visual perception. Through the simulation experiment of life images, experimental results show that the proposed algorithm is better than the traditional pulse coupled neural network model.
Evaluation of Environmental Performance Using the Green City Index in Depok City, Indonesia
Authors: Hakim  , Endangsih Tri 
Published: September 2020

Abstract
Green City Index as a reference to measure environmental performance and improve environmental quality. The growth and development of cities raises environmental problems, especially for cities that have strong connections to the capital of Indonesia such as Depok City. This study aims to obtain the value of environmental performance in the city of Depok with quantitative methods based on the Green City Index with eight assessment categories. The results of this study indicate that the environmental performance of the City of Depok with an average percentage of all categories of 50.2%. Average performance falls into six categories, namely, Energy and CO2, Land Use and Building, Waste, Sanitation, Air Quality and Environmental Governance. While the below average performance in the Transport and Waste category and above average performance in the Water category. For the assessment of community perceptions through the Index of Happiness obtained by 60% of happy people, 23% of people are very happy and 17% of people less happy about the state of the surrounding environment. So it can be concluded that the majority of the people of Depok City are happy living in Depok City with the current environmental conditions.
Analysis of Serang City Infrastructure Service Satisfaction Index (ISSI) and Direction of Utilization of Village Funds
Authors: Nurfindarti E 
Published: September 2020

Abstract
Research on infrastructure service satisfaction index, the direction of infrastructure development at the village level, and utilization of villages funds is still very minimal. The direction for the utilization of villages funds, in general, has been regulated in legislation, but there is no reference yet regarding the type of infrastructure that needs to be built in the villages, even though the process of infrastructure development planning is included in the development accountability assessment. The focus of this research is to analyze the direction of urban infrastructure development using village funds through analysis of the infrastructure service satisfaction index, community proposals, and the results of development evaluations. The research method used is qualitative through content analysis and interviews with village officials and planning officials in Serang City. The results showed that the acquisition of the infrastructure service satisfaction index value for each sub-district became a reference in determining the development of urban infrastructure, paying attention to the proposals of community priorities submitted at the meeting of urban residents, increasing the capacity of the apparatus and improving the development planning application system.
Strengthening and Supporting Efforts to Reduce Swelling of Soil by Using Beach Sands Through CBR Test
Authors: Endaryanta  , Wibowo D E 
Published: September 2020

Abstract
Many roads are damaged due to heavy tonnage vehicles or because the road foundation is in the form of expansive clay. The rescue effort is to use beach sand (sea sand) for stabilization / repair of road sub-grade in the form of clay. This research using experimental method to carried out by repairing/stabilizing soil clay by mixing beach sand. Sand content varies from 60%, 80%, to 100%. Mixed soil was compacted at optimum water content, then tested by CBR test and Swelling test. The results of this study are CBR (strong-support) and Swelling (development) values. Mixing: 60%, 70%, 80%, 90%, 100% beach sand against clay, able to increase the CBR value by a row: 7.3%; 9.6%; 11.8%; 18.5%; 25.2% (Lendah clay, Unsoaked), and 6.2%; 9.8%; 13.4%; 19.3%; 25.2% (Lendah clay, Soaked). The Prambanan clay, the yield is slightly smaller than the Lendah clay. The Swelling value is: 0.095%; 0.055%; 0.015%; - 0.107%; -0.229% (Lendah clay), almost the same as Prambanan clay. Here it can be seen that mixing beach sand will always increase the CBR value, but if the percentage of sand is too much, the soil will easily collapse (negative swelling). The conclusion is that in the clay mixture with beach sand the optimum percentage of beach sand will be 85%.
Comparative Study of Particle Swarm Optimization Algorithms in Solving Size, Topology, and Shape Optimization
Authors: Harsono K , Prayogo D , Prasetyo K E , Wong F T , Tjandra D 
Published: September 2020

Abstract
This paper focuses on optimizing truss structures while propose best PSO variants. Truss optimization is one way to make the design efficient. There are three types of optimization, size optimization, shape optimization, and topology optimization. By combining size, shape and topology optimization, we can obtain the most efficient structure. Metaheuristics have the ability to solve this problem. Particle swarm optimization (PSO) is metaheuristic algorithm which is frequently used to solve many optimization problems. PSO mimics the behavior of flocking birds looking for food. But PSO has three parameters that can interfere with its performance, so this algorithm is not adaptive to diverse problems. Many PSO variants have been introduced to solve this problem, including linearly decreasing inertia weight particles swarm optimization (LDWPSO) and bare bones particles swarm optimization (BBPSO). The metaheuristic method is used to find the solution, while DSM s used to analyze the structure. A 10-bar truss structure and a 39-bar truss structure are considered as case studies. The result indicates that BBPSO beat other two algorithms in terms of best result, consistency, and convergence behaviour in both cases. LDWPSO took second place for the three categories, leaving PSO as the worst algorithm that tested.
Prediction of Concrete Compressive Strength Using Artificial Intelligence Methods
Authors: Muliauwan H N , Prayogo D , Gaby G , Harsono K 
Published: September 2020

Abstract
Concrete is one of the most used materials in buildings today; yet, predicting the accurate concrete compressive strength remains challenging because of the highly complex relationship between its mixture. An accurate method of predicting concrete compressive strength can provide a significant advantage to the construction material industry, particularly within the concrete material industry. Many methods can be used to build the prediction model of concrete compressive strength. However, the traditional methods have so many shortcomings, including expensive experimental costs and the inability to formulate an accurate complex relationship between the components of a concrete mixture with the compressive strength. To overcome this issue, this study applies multiple artificial intelligence (AI) methods to find the most accurate input and output relationships within concrete mixtures. The three types of AI methods that will be used in this study are artificial neural networks (ANN), support vector machine (SVM), and linear regression (LR). This study uses 1030 data samples from concrete compressive strength tests obtained from University of California, Irvine, to demonstrate the use of AI prediction models. The obtained results of the simulation show that these artificial intelligence methods can build predictive models without conducting any expensive experiments in the laboratory with good accuracy.
Correlation Model Between Estimated Project Cost and Net Present Value (NPV) on Transportation Infrastructure Projects Using Public Private Partnership (PPP) Scheme
Authors: Islami R C , Hazhiyah A U 
Published: September 2020

Abstract
Public Private Partnership (PPP) scheme has been used throughout the world as an effective tool to fill the gap between the surge in infrastructure development needs and the shrinking of public fiscal budget. The Ministry of Public Works and Housing 2030’s vision is focused on the construction of infrastructure. The state budget related to road infrastructure development around Rp 1.796 trillion but not all the needs fit to the budget. The aim of this research are identify field facts related to infrastructure financing with PPP, create correlation model and evaluate the suitability of the model. The success factor implementation of Public Private Partnership (PPP) scheme is the positive value of Net Present Value (NPV) that indicates the project is feasible. The correlation model between estimated project cost and Net Present Value (NPV) performed using statistical analysis is also used to make financial scheme from user-pay and government-pay on the PPP. The correlation model is Yt = 102.227.962 + 0,1098892t which the variable t can be changed into the number of estimation concession period. The result from this research are expected as a reference in determining project cost and negotiating the equity financial between user-pay and government-pay on PPP’s project.
The Effect of Combining Coal Fly Ash and Lokan Shells As Filler Towards The Mixture Of Asphalt Concrete Wearing Course
Authors: Chaira  , Veranita  
Published: September 2020

Abstract
Sustainable construction is expected to create a quality environment so that environmental sustainability is maintained. The use of coal as fuel for PLTU have a negative impact on the environment, because it produces waste in the form of fly ash and bottom ash. Lokan freshwater is widely used as a food ingredient. This research study a mixture of AC-WC asphalt using coal fly ash and lokan shell ash as a filler. Research is needed to determine the durability and performance of the pavement that uses these waste materials by using asphalt pen 60/70 as a binder. This study uses Marshall Method and using three variations in the percentage of coal fly ash and lokan shell ash to the total filler. The highest stability obtained at V1 with a value of 1,389.158 kg. Marshall test conducted on the AC-WC blend on OAC for the mixture variation of V1, V2, V3, disclosed that Stability, flow, MQ, VMA and VFB values were acquiescent to the required specification. For the value of VIM on V1 and V3 were not acquiescent to the required spesification. The coal fly ash and lokan shells as filler recommended for alternative material on a mixture of AC-WC.
Development of Subsidized Housing Scheme with Sustainable Transportation: A Case Study of Housing in the Urban Fringe of Semarang and Kendal
Authors: Indriyanti A , Ismiyati  , Sunaryo B 
Published: September 2020

Abstract
The increase in the price of buying houses by 23.77% in the first quarter of 2019 has caused severe challenges. This made the Indonesian government create a subsidized housing program through the Regulation of the Minister of Public Works and Public Housing No 21/PRT/M/2016. This is necessary because the existing subsidized housing is far from the city center and does not pay attention to integrated public transportation as well as the high use of private vehicles causing the value of the degree of saturation to reach 0.77 on housing access which makes the whole scheme environmentally unfriendly. Therefore, this research was conducted to analyze the factors influencing the community to select a subsidized housing program and determine the design of its integration with sustainable transportation using simulation methods. The findings showed the most influential factors were accessibility and choice of transportation modes while the ideal simulation reported the use of integrated transportation in the construction of subsidized housing, by making all private vehicle passengers shift to public transportation in Kendal District reduced the highest saturation level (DS) from 0.77 to 0.07 and CO2 emissions by 47.71%. Therefore, the revision of government policies on integrated transportation in subsidized housing is recommended.
Portable Fume Hood as an Environmentally Friendly Laboratory Tool to Neutralize Acid Contamination
Authors: Amri C 
Published: September 2020

Abstract
A portable fume hood design with an acid pollution absorber filter was prepared. This study aims to: (1) make a portable fume hood equipped with an acid contaminant absorbent filter housing, and (2) determine the length of time the ability of the lime granule can function as an acid contaminant absorbent filter. This study is a quasi-experimental study using posttest only with control group design to assess the feasibility of using lime granules as acid absorbent filters on portable fume hoods. Data analysis was performed by regression using the Excel program. The results of the study are as follows: (1) portable fume hood that use acid-absorbent filters have been made, (2) The average length of time the ability of lime granules can function as an acid contaminant absorbent filter on the use of a portable fume hood at a lime granule weight of 0.5; 1,0; 1,5; and 2.0, respectively 222, 589, 880, and 1219 minutes. This relationship can be estimated with a regression equation Y = 0.619X -36.71. Which Y is the ability of lime granule as absorbent of acid contamination, and X is the weight of lime granule.