bluuebunny/crossref_metadata_2025_split huggingface dataset:
Prediction of 18Ni300 laser cladding topography based on back-propagation neural network and particle swarm optimization
Authors: Xiawei LE , Jingbin HAO , Qingdong MENG , Fangtao HU , Hao LIU , Haifeng YANG , Xinhua LIU 
Published: March 2021

Abstract
Laser cladding is an advanced new surface manufacturing technology, which has a wide range of applications in production, repair and surface strengthening of parts in many industries. Aiming at the problem that the forming quality cannot be guaranteed after the Q235 substrate, a full factorial design method was used to conduct the experiments. Then a multiple linear regression model was established to obtain the functional expression between the cladding layer morphology parameters (cladding layer height, cladding layer width and dilution ratio) and laser power, scanning speed and powder feeding rate. And then back-propagation neural network (BPNN) and particle swarm optimization (PSO) were used to establish prediction models between the morphology quality of the laser cladding layer and the process parameters. Finally, the prediction results of two models were compared with the measured value, respectively. The results showed that the average relative errors of the multiple linear regression model for the prediction of cladding layer width, height, and dilution ratio were 4.525%, 6.018%, and 5.659%, respectively, while the average relative errors predicted by the optimized neural network model were 3.177%, 7.242%, 4.679%, respectively. The goodness of fit(R2) in linear regression model were 0.8034, 0.8407, and 0.8297 respectively, while the R2 in PSO-BPNN model were 0.8134, 0.8336, and 0.9576 respectively. In this paper, the feasibility of the PSO-BPNN model in theory and practice was verified, and it provided theoretical guidance for the realization of the subsequent laser cladding closed-loop control system.
Automatic braking system using fuzzy logic method
Authors: Rizianiza I , Shoodiqin D M 
Published: March 2021

Abstract
This research is design an autonomous car control system that can reduce the rate of traffic accident. Car prototype is designed by using Fuzzy Logic Control. Fuzzy logic is as main component of artificial intelligence has significantly influence the design controlled system. Fuzzy logic system is integrated with the arduino Mega 2560 microcontroller as the central control car prototype. In this paper, the Fuzzy logic used Mamdani method and 28 rule base. The fuzzy system was made based on fuzzy mechanism which are fuzzification, inference and defuzzification. Fuzzy logic has a variable input and output variables. Input variables used in this research is the distance between car and obstacle; the speed of car prototype and the output variable is the brake angle. The test is done with 5 variations of distance that is 100 cm, 125 cm, 150 cm, 175 cm, and 200 cm and two variations of speed that are 54 cm/s, and 63 cm/s. The test results showed that the prototype of the car was able to stop with a range of 22 cm - 35 cm from obstacle. The highest deceleration value at the speed of 63 cm/s is - 49.22 cm/s2 and the accuracy of braking on a system that has been designed is between 99.91% -100%.
Decreasing corrosion rate of clean water distribution pipes using bio-inhibitor
Authors: Mulyaningsih N , Ika D 
Published: March 2021

AbstractIron pipes that distribute clean water to the community often experience corrosion and leakage. It causes dirt in the soil to enter the water flow and can cause health problems. Therefore, to provide good quality water to the community, it is necessary to control pipes’ corrosion. In previous research, there has been much discussed the bio-inhibitor corrosion in pipes, but very few have tested corrosion under real environmental conditions. Thus, this research aims to analyze the amount of reduction in the corrosion rate of clean water distribution pipes using real environmental conditions using bio-inhibitors. This study employed the same bio-inhibitor but different concentration variations. The inhibitor used came from lime peel waste with various concentrations of 120, 220, and 320 ppm. Corrosion rate testing used Potentiodynamic methods. The results showed that using a bio-inhibitor of 320 ppm could reduce the pipe’s corrosion rate by 90.7%. Before being given the bio-inhibitor, the corrosion rate was 34.690 mpy, and after being given the bio-inhibitor, it decreased to 3,225 mpy. This study’s results will later be useful for the community to utilize the bio-inhibitor as an alternative to controlling corrosion in pipes.
Students’ perspective: instructional design and technology that should be done in vocational teacher education
Authors: Yudantoko A 
Published: March 2021

Abstract
The development of science and technology, the industrial revolution 4.0, the 21st century required skills, the ASEAN Economic Community, and the characteristic of 21st-century students bring significant effects for educational programs for preparing appropriate skills for students to face those challenges. Instructional design that should be done in the teaching and learning processes in the classroom is one of the crucial things that have high impacts on students’ success in mastering subject matter. This study aims to describe important things of instructional design and technology that students want to be implemented in their learning activities. This study is a descriptive survey research with exploratory sequential mixed-methods data analysis. The data was collected by conducting focus group discussions (FGD) and questionnaires with first-year students in 2 classes of automotive vocational teacher education in Yogyakarta State University. The results of this study are (1) having a structured program in an online platform with specific preferred learning materials before classroom activities for preparing needed background knowledge, (2) having discussions for exercising high order thinking skills in classroom activities, and (3) having checking understanding and discussion forum program in an online platform.
Human daily activities recognition using decision tree
Authors: Nurwulan N R , Selamaj G 
Published: March 2021

Abstract
Decision tree is a supervised classifier that is easy to understand. There are various decision tree methods. This study aimed to compare the performance of decision tree methods in human activity recognition using acceleration and jerk data. The subjects performed human activity daily living, namely walking on a flat surface, walking upstairs, walking downstairs, sitting, standing, and lying down. The features were grouped into three categories: acceleration features, jerk features, and combined features of acceleration and jerk. The evaluation was done using Random Forest, J48, Logistic Model Tree, Reduced Error Pruning Tree, Decision Stump, Random Tree, and Hoeffding Tree. The results showed that Random Forest outperformed the other classifiers with acceleration features performed better than the jerk features. However, the combined acceleration and jerk features yielded the highest accuracy. In conclusion, Random Forest is the best decision tree technique in recognizing the pattern in human activity.
A model of serious game-based learning media on the basic material of statics and dynamics
Authors: Zen A. S. , Nurhadi D. , Widiyanti  
Published: March 2021

Abstract
Purpose of this paper is to explain a serious game based learning media model on the basic material of statics and dynamics for students of mechanical engineering education, Universitas Negeri Malang. This study carried out by research and research (R&D) with the waterfall research model. In the first stage, the design of this model is based on a low understanding of the basic material of statics and dynamics. Through discussions with the lecturers of the course, the authors developed this design to be prepared for trials for mechanical engineering education students at Universitas Negeri Malang. Furthermore, this media model contains two menus, namely materials and quizzes. The material consisted of unit material and mathematics. Meanwhile, the quiz material consisted of four quizzes with Bloom’s taxonomy levels. Through this media model, it is concluded that it will assist students in understanding basic statics and dynamics in the field of mechanical engineering.
Sealed trash bin with innovative design technology and environmental education
Authors: Peng L H , Wang Y W , Siswanto I 
Published: March 2021

Abstract
With the advancement of the times, science and technology have become more developed, and a variety of items are manufactured quickly, resulting in invisible waste under over-manufacturing. Waste of resources has become a burden on the environment [1], although people’s quality of life The improvement is accompanied by many garbage disposal problems. Although the application of traditional trash cans can improve the mess of the environment in a short time, it cannot effectively prevent the stench emitted by garbage corruption and hygienic infection problems caused by weather changes. In this study, the design improvement of the traditional treaded trash can and the sealing machine seen in daily life was used to analyze the advantages and disadvantages of the creative design of the trash can and the material needs of designers from all over the country and then complete the product that meets the universal system. We also hope that this technology design Can be integrated into environmental education and bring new practical ideas.
Android application innovation as the indonesian basic spices learning media
Authors: Wulandari D R , Handayani T H W 
Published: March 2021

Abstract
Education is a significant aspect in the development of a nation. Currently, Indonesia is entering the industrial revolution 4.0 which brings a great impact in various fields, including the field of education as the learning process must continuously evolve by embracing the applications of digital media. However, the learning process in formal education at the moment in Indonesia, especially in vocational high school, tends to use conventional-type media and methods. As a result, students are less enthusiastic and experience difficulties in understanding the lessons and absorbing the materials in the class. For this reason, this study develops a learning media innovation that addresses current student needs by developing an Android application innovation. The method used was the research and development (R&D) method, while the objective of the study was to examine the development process and feasibility of the Android application learning media for Indonesian Basic Spices. The research findings suggest that (1) the development process of the application uses the 4D research method (define, design, develop, and disseminate) and results in a 26.25 MB application using the Adobe Animate software.
Analysis of the need for the development of learning media for IOT-Based smart building installation systems
Authors: Salsabila A , Khairudin M 
Published: March 2021

Abstract
Learning media is a means of learning for students that can provide a real picture of real work that has a high risk if it is carried out directly. Learning media has a role in facilitating students to be able to experience it directly with minimal risk from a practicum. Analyzing the need for making learning media is very important for the development of real learning media. This study aims to: (1) Determine the need for the development of learning media for IOT-based smart building installation systems in Vocational High School (VHS); (2) Analyzing the needs used in the development of learning media for IOT-based smart building installation systems in VHS. The results showed that the things needed in developing IOT learning media were seen from the technology used in the form of (1) Software based on media interaction with the internet using a visual studio; (2) Arduino Uno, temperature sensor device, ESP8266, gas sensor and light sensor are needed as hardware to reflect building capabilities; (3) The cloud computing system uses spread sheets to store data; (4) Internet network for uploading and downloading data. In its implementation, a needs analysis for the development of instructional media is needed so that in the later development process the media is developed appropriately and on target. The results of research and development research using the ADDIE method need the development of learning media for IOT-based smart building installation systems in vocational high schools to improve the learning abilities of students.
Effect of Convection on the Distortion of Spatial Self-Phase Modulation Pattern in Graphene Dispersions
Authors: Ma Lingyue 
Published: March 2021

Abstract
Effect of convection on the distortion of spatial self-phase modulation(SSPM)pattern in graphene dispersions has been investigated. When a Gaussian laser beam is transmitted through grapheme dispersions, the interference pattern in the far-field first forms a series of circular rings, but the upper half of the rings collapses rapidly after a period of time, forming a stable distorted pattern. Experimental results show that thermal convection effect plays a dominant role for the distortion of the SSPM pattern. In the absence of convection in the beam cross section, the interference rings are circularly symmetric rings. In the presence of convection in the beam cross section, the interference rings exhibit circularly asymmetric rings. Theoretical analyses have then been given for the reason of the interference rings distortion. Convection can effectively change the spatial symmetry distribution of polarized graphene sheets and non-linear refractive index in the beam cross-section, thus making the interference rings distortion based on the spatial self phase modulation. It is concluded that the distortion of the interference pattern is originated from the thermal convections induced by laser heating.
Two-dimensional Phase-field Simulation of Pore Evolution in High Temperature Self-lubrication Composites
Authors: Han Tiantian , Zhou Changxiu , Kong Dejun 
Published: March 2021

Abstract
The phase field model was established based on the free energy function method to simulate the evolution process of microporous matrix. High temperature self-lubricating microporous matrix was prepared by powder metallurgy method, then its porosity was measured under different pore forming agent ratio and addition amount, in order to verify the phase field model. The results show that the simulation value of porosity by phase field method is basically consistent with the experimental value, and the phase field model can be used to simulate the effect of pore forming agent on the pore evolution process of matrix.
Heterogeneous Bimetallic Selenide Anchored Carbon Nanotubes for Boosted Hydrogen Reactions
Authors: Wang Bin , Zhang Xiaojuan , Chen Yuanfu 
Published: March 2021

Abstract
Herein, bimetallic sulphide CoSe2-FeSe2 anchored on the surface of carbon nanotube (CNT) networks are prepared via a selenization and subsequent annealing process. The CoSe2- FeSe2/CNT hybrid shows excellent property for electrocatalytic hydrogen evolution reaction, featured by a low Tafel slope of 39 mV dec−1, an overpotential of 205 mV (10 mA cm−2), as well as good long-term stability in 0.5M H2SO4 electrolyte. The outstanding HER performance is mainly due to the synergistic effects of the bi-metallization and its unique porous nanoarchitecture: the bi-metallization causes strong coupling interaction between CoSe2 and FeSe2, which facilitates the charge transfer at the interfaces and the reconfiguration of the partial electron structure; the porous nanoarchitecture enable the close contact between electrolyte and active site as well accelerate the evolved gas bubbles releasing. This work provides insight into facile fabrication of bi-metallic selenide electrocatalysts with excellent HER performance in acid medium.
Study on Anti Pilling Finishing of Embroidery Products
Authors: Li Bangyu 
Published: March 2021

Abstract
The problem of easy pilling of embroidery has become a pain point of consumption. The water-soluble polymer finishing agent is applied on the embroidery along the embroidery pattern line with a brush. The treated embroidery is ironed and solidified with an iron. Natural extract finishing agent was used for secondary reinforcement in the later use. The results show that the film with good mechanical properties and transparency can be formed on the surface of embroidery fiber when the finishing agent concentration is 0.6 wt%. The breaking strength of embroidered silk fiber is improved and the fuzzing degree is reduced. The fuzzing resistance of the finished embroidery decreased with the increase of washing times. The fuzzing resistance of the finished embroidery was restored to a certain extent after the secondary reinforcement with 0.2 wt% Gleditsia sinensis gum.
Experimental Study on the Influence of Tool Wear on the Cutting Process of Ti6Al4V
Authors: Liu Qimeng , Xu Jinkai , Yu Huadong 
Published: March 2021

Abstract
The tool wear is a big problem when machining titanium alloy. If the tool wear law is not mastered well, the machining quality will not be guaranteed. In this paper, the theoretical model of the tool is established, which can understand the spatial dimension model of the tool. At the same time, the tool wear experiment of the most commonly used tool for titanium alloy machining in the manufacturing industry is carried out, and the influence of the tool cutting wear on the cutting process is studied. The experimental analysis shows that the tool produces the chip extrusion stripe when it is worn in the initial stage and normal stage, which is perpendicular to the chip in the outflow direction, the fringe protrusions are parallel, and the contact surface of the chips is relatively flat. When the tool reaches the stage of severe wear, the protrusion stripes perpendicular to the outflow direction of the chips are fluffy, and the stripes are twisted. With the continuous cutting wear time of the tool becoming longer, the cutting force, the residual stress of the machined surface layer and the cutting temperature obtained in each stage gradually increase; with the tool reaching the stage of severe wear, the protrusion stripes are fluffy, and the stripes are twisted The tool wear time gradually increases, and the cutting surface roughness obtained by continuous tool wear decreases first and then increases; the surface quality of the tool in the initial wear stage is relatively obvious and the edge burr is large, while in the normal wear stage, the surface quality of the tool is gradually gentle, but when the tool reaches the severe wear stage, the surface quality of the tool begins to be processed Sharp drop and thick edge burr.
Analysis on the Control Effect of Enhanced Cushion on the Difference Settlement of New and Old Subgrade in Soft Foundation Area
Authors: Jiang Zhenhua , Yang Dongxing , Yang Zhiwei , Wang Zhe , Zhang Xiaochun 
Published: March 2021

Abstract
In order to reduce the differential settlement of the extended urban highway splicing segment, we monitored the junction of the new and old subgrade in the practical engineering, analyzed the value of pavement deformation. It found that the smaller the modulus ratio of the new and old subgrade, the greater the non-uniform settlement value. At the same time, the uneven settlement and lateral displacement of the road can be effectively reduced by using the pile-reinforced cushion structure. So the results show that the pile-reinforced cushion structure can effectively reduce the uneven settlement and lateral displacement of the old and new roads, strengthen the links between old and new roads; To enhance the stability of subgrade, it can be used for widening the old road in soft soil foundation.
Research on Biaxial Damage Evolution Characteristics of Flexible Woven Composite Film
Authors: Liu Longbin , Yang Songyuan , Wang Yue 
Published: March 2021

Abstract
The flexible braided composite film structures have been widely used in many fields such as near space aerostats, inflatable wings, flexible spacecraft due to their unique advantages such as small folding volume, light weight, high specific strength, excellent comprehensive performance, etc. However, the space environment is so harsh, and the flexible film structure composite material could be easily affected by various environmental factors such as long-term sunlight, ultraviolet radiation and space particle impact. So the weathering damage evolution characteristics directly determine the use life and working efficiency. The typical biaxial fiber reinforced laminated flexible composite material was studied with the damage mode, and the composite meso-mechanical theory was also used to construct the braided composite mechanics model during the damage process. The damage model of the warp and weft fiber bundles with the base film layer was introduced into the independent flexible film composite component damage degree, and the damage evolution model of the damage-containing composite material characterized by the mesoscopic component parameters was also established. Moreover, the load-bearing stress characteristics of each component under different damage conditions were calculated and analysed. The research results could provide an effective theoretical reference for the weathering optimization design and the improvement of the service life of flexible film woven composite structures.
Investigation on Microstructure and Hardness of In-situ (TiB+TiC)/Ti Composite Prepared by Selective Laser Melting
Authors: Zhu Dong , Zhang Liang , Wu Wenheng , Lu Lin , Song Jia , Ni Xiaoqing , Zhu Wenhua , Zhao Jinmeng , Gu Sunwang , Shan Xiaolong 
Published: March 2021

Abstract
This paper aims to research the influence of the addition of boron carbide ceramic particle enhancer on the grain shape and microstructure of commercially pure titanium (CP-Ti) during laser additive manufacturing process. It is found that during SLM process of B4C/CP-Ti, the reinforced particles B4C react with CP-Ti to produce prismatic TiB and whisker-like TiB and granular TiC. The in-situ synthesized TiC and TiB extremely improve the microhardness of the SLM-processed Ti composite from 213.9 to 513 HV0.5, but drastically reduced its plasticity in comparison to CP-Ti, which is of great significance for further popularization of titanium matrix composites.
Method for Exploiting High-viscosity and High-pour-point Crude Oil
Authors: Xie Wei , Chen Lei , Xia Zhixue , Wang Fang , Ou Jianguo , Liu Wenmao , Liang Xinkun , Liu Jundong , Liu Zhixian 
Published: March 2021

Abstract
Because of its high viscosity and high freezing point, high viscosity and high pour point crude oil has always been a difficult problem in production. On the basis of fully studying the viscosity temperature characteristics of high viscosity and high pour point crude oil, this paper puts forward the idea of hydraulic cutting. This method accurately grasps the freezing point of high viscosity and high pour point crude oil. The high viscosity and high pour point crude oil is cut by high-speed cold water hydraulic cutting near the freezing point, which is cut into fine crude oil particles or crude oil flocs. These fine crude oil particles or flocculent crude oil float in continuous water phase, and are mined to the surface with solid or semi-solid water flow. Thus, the problem of low cost exploitation of high viscosity and high pour point crude oil is solved. This method not only provides an effective technical means for the exploitation of high viscosity and high pour point crude oil, but also greatly reduces the production cost. It has a high application prospect and good economic benefits.