bluuebunny/crossref_metadata_2025 huggingface dataset:
Analysis of replacement and selection of machines using dynamic program and AHP methods
Authors: Sutoni A , Gopar A
Published: December 2019

CV. Do’a Sepuh is a rice mill company. This factory often experiences problems in the cost of engine maintenance which increases every year. Therefore, planning actions must be taken in the form of replacement and selection of new, more economical machines. This study aims to make a model of engine replacement decisions to minimize the expectation of total costs, calculate the time (years) that is appropriate to make changes using the Dynamic Programming method. As well as making decisions on the use of new machines using the Analytical Hierarchy Process (AHP) method. Previously, a Focus Group Discussion I (FGD I) was conducted to determine which machines would be chosen and determine the engine selection criteria. Furthermore, Focus Group Discussion II (FGD II) was carried out to calculate the operating costs of new machines, revenue for new machines, the remaining number of new machines, and filling out questionnaires. The results obtained were the decision to replace diesel engines in the first year. The engine chosen, for the selected diesel engine is machine 1 (Yanmar TS 230 R).
Comparison of job shop production scheduling by using the non-delay method and the Heijunka method at PT XYZ
Authors: Kulsum  , Muharni Y , Pratiwi A S
Published: December 2019

The problem that often occurs in this company is the accumulation of orders at one time with a large quantity of products and human resources that are still relatively low can be one of the causes of delays in completing orders for customers. We using Non Delay Method and the Heijunka Method. Where, the Non Delay method is a method that does not let the machine idle if an operation can be started. While the Heijunka method is more concerned with equity in its production. In this study, scheduling using the Non Delay Method is better than using the Heijunka Method or using the existing scheduling method used by the company, because it can produce a faster makespan value. With this Non Delay method, to produce 3 Job 5 machines produce makespan of 3772.01 minutes smaller than using the Heijunka Method which results in makespan 3820 minutes. While the results of existing scheduling makespan only produce 3880.35 minutes.
The implementation of green lean manufacturing in small scale industry: Reduction energy waste and emission
Authors: Lintang S A , Harwati
Published: December 2019

This research basically aims to implement green lean manufacturing concept in a small scale industry. A green lean manufacturing is reached by energy saving and emission reduction. Current environmental Value Stream Mapping (VSM) is developed for Batik manufacturing process to identify wastes and bottleneck processes. Traditional process of producing batik raises several problems such as long cycle time and it emerges energy waste, excessive water consumption, emissions from combustion that can damage the environment. Based on all waste that was identified, solutions are suggested to eliminate the energy and emission produced. A future environmental VSM is designed, simulated, and compared with current VSM. The solutions decrease 3.9 of cycle time, 14% of energy consumption, and 63% of emission. This result showed that the solutions are applicable to be implemented in that small scale industry.
Productivity improvement of assembly department by using value stream mapping and computer simulation approach
Authors: Sulistio J , Hendradewa A P , Nabila A
Published: December 2019

As a matter of fact, productivity improvement is a common objective which are faced by almost every industry. Lean manufacturing is one critical key of success to achieve productivity by increasing effectivity and efficiency of an industry. A manufacturer which annually produces piano in a huge capacity has a target to improve the ability to satisfy its high demand. As a solution to the problem, this study focused on lean manufacturing design, specifically on assembly unit department. This study conducted by utilizing two methods, Value Stream Mapping and Computer Simulation technique as a system approaching tool. According to the problem identification stage using Current State Mapping, the productivity level on assembly unit department is only 0.27 unit/person/hour, still at below level of the productivity target 0.36 unit/person/hour. The problem indicates that there was many possible productions system matter, such as: production process input, which was not utilized in an optimum way, workload distribution that was not well-managed, and operator ability that is under specification. By using computer simulation approach, this study suggested couple of alternatives to answer the productivity problem.
Designing market systems with content management system (CMS) WordPress
Authors: Gunawan A , Wahyuni N , Akmal R
Published: December 2019

The era of industrial revolution 4.0 was marked by the application of information technology in running industrial activities, the application of information technology needed was the development of a website-based business application model to increase competitive advantage. duta dharma is one of the medium enterprises that produce various types of processed soap. The sales system at cv duta dharma uses a manual system. This is still not fallen enough to change a significant increase in development. Therefore, need to design an e-commerce website-based online marketing information system. System modeling in the e-commerce website design system cv duta dharma is designing a context diagram to find out the stakeholders, designing decomposition to find out the inputs, processes, and outputs. Then design a data flow diagram to find out the data flow in the sales system, e-commerce website duta dharma enterprises have been designed and created with Wordpress. This e-commerce website has bank transfer payment facilities and can be run well and is expected to be able to make them more known and make it easier in product marketing.
The analysis of heat transfer and pressure loss for the air flow through heated cylinders with concave delta winglet vortex generators in rectangular channel: an experimental study
Authors: Effendi Y , Syaiful  , Djaeni M , Winoto S H
Published: December 2019

The use of vortex generators to increase heat transfer in the evaporator fin-and-tube heat exchanger. Therefore the purpose of this study is to determine the effect of the use of vortex generators on increasing heat transfer coefficient and flow loss at heated tubes in rectangular channel. The experimental method is to compare the use of vortex generators and without (baseline). Vortex generators include 1, 2, 3 rows of pairs of concave delta winglet vortex generators (CDWP) and delta winglet vortex generators (DWP). Both of types of vortex generators at angle of attack (β) 15°, inlet velocity variation from 0.4 m/s - 2.0 m/s. Vortex generators were mounted on aluminum plate, heated tube with 35 watts and temperatur 38°C. Inlet, outlet and tube temperatures are measured using a thermocouple. The experimental result show that with the use of vortex generators the values of convection heat transfer coefficients and flow loss increased compared to those without vortex generators. The highest heat transfer coefficient on reynold number range 11000-12000 when using 3 pairs of concave delta winglet vortex generators are 46.76%, and 52% value pressure loss at inlet velocity 2 m/s on 3 pairs of concave delta winglet vortex generators, compared to baseline (without vortex generators).
Investigation of the correlation between drainage condition and pavement performance
Authors: Iskandar D , Hadiwardoyo S P , Sumabrata R J , Fricilia M
Published: December 2019

One of pavement deterioration causes is the lack of road drainage maintenance. Road drainage system has a function to dry the pavement thus water can flow as quickly as possible out of the road surface and then flow through the channel to the final disposal. Road distress will interfere the comfort and safety ride and affect the pavement structure performance and quality. This research aims to identify and analyze the influence of drainage conditions through road pavement structures distress using Pavement Condition Index (PCI) method in Jakarta. The method used is a field research with primary data in the form of road distress survey that will be evaluated using PCI and analyzed using factorial experiment design. The research results using Design of Experiments shows that the main factors which greatly influence the road distress is drainage conditions, PCI score and surface water condition. Most of the surveyed region has a “good” PCI score and “routine maintenance” type.
Performance and emission study of exhaust gas single cylinder diesel engine based on fuel bioethanol – high speed diesel (HSD) using fumigation and blending methods
Authors: Rosyadi I , Haryadi  , Henry
Published: December 2019

Diesel engine exhaust gas contains a lot of particulates because it is influenced by factors from fuel which is not clean. The addition of ethanol to diesel fuel is expected to provide a solution to reduce exhaust emissions from diesel engines. The first step is fumigation method, process of mixing High Speed Diesel (HSD) and bioethanol directly in the combustion chamber of a diesel engine. The second method is compared with Blending method. HSD is mixed with bioethanol, there are 5 variation mixing. Variation 1 blending method diesel fuel (diesel), variation 2 (93% diesel, 2% surfactant and 5% ethanol), variation 3 (HSD 88%, 2% surfactant and ethanol 10 %), variation 4 (83% diesel fuel, 2% surfactant and 15% ethanol) and variation 5 Fumigation method (ethanol and diesel). This work were carried out at the Performance Engine Laboratory and Mechanical Engineering Manufacturing Laboratory in Engineering Faculty of Universitas Sultan Ageng Tirtayasa. The hypothesis of this research is that the mixture of ethanol and diesel fuel produces greater power and consumption compared to diesel fuel. Ethanol and diesel fuel mixtures can also reduce air pollution compared to diesel. Judging from the smoke density of each fuel.
Rice husk gasification performance to decrease water content in liquid palm sugar
Authors: Listijorini E , Wiyono S
Published: December 2019

Gasification is a process of changing thermochemical solid fuel into gas. In simple terms, the gasification process can be said as a chemical reaction at high temperatures between biomass and air. The purpose of this study was to determine the effect of AFR on the performance of the TG30-1 gasification engine and compare it with the same engine performance in previous studies. This study uses blowers which are combined with an inverter to vary the frequency of rotation of the motor. From the three tests, the results of different performance analyses were obtained. In this study, experiments on corn cobs biomass for 45Hz motor frequency (90%) produced the best Fire Power and Specific Power at 23.01 kW and 3.71 kW / kg with AFR values of 1.54. Palm shell biomass with 45Hz motor frequency (90%) yields 18.32 kW and 3.24 kW/kg with an AFR value of 1.23. Wood powder biomass with 45Hz motor frequency (90%) produces 22.53 kW and 3.88 kW / kg with an AFR value of 1.36. Rice husk biomass with a 45Hz motor frequency (90%) yields 29.08 kW and 6.39 kW / kg with an AFR value of 1.15.
Effect of air fuel ratio (AFR) on performance of gasification machine TG30-1 using water boiling test method on wooden powder biomass
Authors: Lusiani R , Sudrajat A , Erwin
Published: December 2019

Gasification is a process of changing thermochemical solid fuel into gas. In simple terms, the gasification process can be said as a chemical reaction at high temperatures between biomass and air. This study was to determine the effect of AFR on the performance of the TG30-1 gasification engine and compare it with the same engine performance in previous studies. This study uses blowers which are combined with an inverter to vary the frequency of rotation of the motor. From the three tests, the results of different performance analyses were obtained. Result wood powder biomass with 45Hz motor frequency (90%) produces 22.53 kW and 3.88 kW / kg with an AFR value of 1.36.
Design of alpha type stirling machine biomass-based innovation design with the capacity of 100 watt
Authors: Satria D , Susilo S , Lusiani R , Hermawan Y
Published: December 2019

Stirling machine has the advantage that it can utilize all kind of fuel, so that it is suitable for biomass utilization. In this study the analysis of best design of stirling machine different from previous study was carried out, which is design innovation on alpha type stirling machine by making phase angle become 180°, with the aims of lowering the gravitational force when cool cylinder is compressed, because the existing phase angle used is (90°) has the disadvantage of cool cylinder which is perpendicular, so that the compression is against gravitational force. The designing method was conducted by using Quality Function Deployment. The result of this study was to obtain the best variance of shape and machine stirling design dimension, which is variance 5, biomass stove- pulley and belt- was directly used. Variance 5 is chosen because it was the most suitable with the designed specification. Biomass stove is chosen as heat source, because the fuel used is classified as alternative fuel. Pulley and belt were chosen as mechanism of work transmission, because it has less noise compare to sprocket and chain. Its output work was directly chosen because its construction is simpler and the energy used is more optimal.
A Preliminary study of three-phase column flotation process monitoring using electrical capacitance volume tomography
Authors: Haryono D , Harjanto S , Rahmandani H F , Oediyani S , Nugraha H , Huda M A
Published: December 2019

A preliminary study of three-phase column flotation process using electrical capacitance volume tomography (ECVT) has been conducted. The purpose of this study is to investigate the possibility of ECVT method as a monitoring system by correlating the relative permittivity distribution (or three-dimensional image) with metallurgical performance (recovery of the process). Experiments were performed in a laboratory-scale flotation column with ECVT sensor embedded outside the pipe wall on the collection zone. The feed used was a synthetic ore consisting of sphalerite and silica with the purity of 99%. Process parameter used was air flow rate ranging from 2-4 l/m which each process was conducted for 10 minutes. The results showed that the ECVT method could observe the dynamic process of flotation, specifically in monitoring a feeding process and a separation process. They were indicated by increased and decreased relative permittivity distributions respectively. Relative permittivity signal and metallurgical performance have a good correlation and showed a positive correlation. These results show a prospect of ECVT method as the monitoring system in the flotation process, but further works need to be done for this monitoring system.
Impact Optimal DG Placement Against Harmonic Distribution on Reconfiguration Distribution Network on Microgrid System
Authors: Faraby M D , Penangsang O
Published: December 2019

Increases in harmonic distortion in Radial Distribution System (RDS) will result in additional shorter insulation lifetime, higher temperature and also malfunction. These are undesirable as they cause power losses and also affect the voltage profile. In this paper the harmonic analysis is carried effect and performance placement Distributed Generation (DG) after reconfiguration distribution network in active radial distribution system or microgrid concept. The optimal size of DG is determining using K-Means Clustering method and Load Curtailment method to designing distribution network reconfiguration after restoration. The load flow analysis and harmonic flow analysis is carried out with direct approach using BIBC and BCBV matrices. The proposed method is carried out on IEEE 33 bus system having the harmonic sources injected as current sources using MATLAB and ETAP software. The result show DG placement on 4 bus points using K-Means Clustering can improve voltage levels and reduce harmonic dispersion. After restoration and reconfiguration of the system, the harmonic spread is strongly influenced by the current flowing on the bus and the location of the source harmonics on the system.
Classification of News on “Radar” Tarakan Online Using K-Nearest Neighbor Method with N-Gram Features
Authors: Bintari E D , Gunawan  , Indriani A
Published: December 2019

Classification or text categorization is one of the most common themes in analysing complex data. The classification in this research aims to define the class of an object that has not been known to the class. The classification process will be performed in the process of learning and testing against a known class dataset object. As an online news information, Radar Tarakan classifies news to ease readers to find the desired news and to ease the work of the administrators to do the automatic classification. The website of Radar Tarakan daily news (www.radartarakan.co.id) publishes approximately 480 local news everyday. Local news is the news in the surrounding areas of Tarakan in North Borneo. The website contains the classification of eight local news including the dimensions of the area surrounding the town of Tarakan. This research uses 720 news to build the system of news classification automatically. A text classification method used in this research is the K-Nearest Neighbor (KNN) with N-grams. The accuracy of matching classes generated by the K-Nearest Neighbor with N-Gram is 85.65% (out of 180 test data) and that of the sub class is 70.35 %. The classification time is around 2.7 second per news.
Optimization of Pouring Temperatures and Stirrer Speed Parameters on a Semi-Solid Slurry of ADC12 Al Alloy Prepared by Mechanical Stirring
Authors: Rasyid S , Renreng I , Arsyad H , Syahid M
Published: December 2019

This paper presents an experimental design approach for the optimization process parameters for the aluminum solid alloy casting of ADC12 alloys. To achieve this goal, the pouring temperatures and stirring speed are selected and two levels of this parameter are considered. Design of expert (DOE) of tests was used for experimental design and analysis of results. The aluminum ADC12 slurry is stirred by a mechanical stirrer (round rods stirrer models) with a variation of speed 250, 300, 350 rpm for 20 seconds. Furthermore, the aluminum slurry of ADC12 is poured on a metal mold with a temperature of 620 °C, 600 °C, and 580 °C. The microstructure characteristics were examined by direct observation using optical microscopy, secondary α-Al phase dendrite arm spacing and shape factor were identified. The mechanical properties were investigated by the hardness test and tensile test. The mechanical properties and microstructure of aluminum alloys ADC12 made with semi-solid rheocasting casting technology using several parameters pouring temperature and stirring speed have been studied, and the results obtained can be synergized as follows. ADC12 aluminum alloy slurry preparation using a round rod mechanical stirrer on semi-solid casting can improve mechanical properties. Low pouring temperature and high stirring speed are reliable techniques for producing the right mechanical and microstructure properties for a semi-solid casting process (Rheo casting). The pouring temperature and stirring speed are recommended to produce optimal mechanical properties and the round microstructure is 580 °C and 350 rpm.
Microstructure and Hardness Analysis of 2A14 Aluminium Alloy Join By Pulsed Electron Beam Welding
Authors: Dai Hailin , Du Ruizhao , Xing Shuai
Published: December 2019

Microstructure and hardness Analysis of 2A14 Aluminium Alloy Join by pulsed electron beam welding. Study on microstructure appearance and hardness analysis of 2A14 Aluminium Alloy Join by Pulsed Electron Beam Welding was carried out. The results show that the micro-structure of the weld zone was fine equaxied grains and the pulsed electron beam changed crystal morphology. The HAZ was the weakest hardness area of the the joint.
Mechanical Properties of CFRP Materials with Ply Splice Structures
Authors: Zhu Meng , Hu Qigao , Ju Su , Rui Wang , Chen Dingding
Published: December 2019

With the development of science and technology, it is inevitable to apply ply splice to meet the requirements of engineering size and shape. The existence of splicing structure will inevitably produce complex stress distribution inside the material, which will lead to serious safety hazards. In this paper, tensile and bending properties of unidirectional carbon fiber reinforced plastic (CFRP) with ply splice structures were studied through tensile and four-point bending experiments. The results show that the higher the number of splicing layers, the lower the tensile strength, and the final strength is determined by the number of continuous fiber layers without splicing. However, there is almost no effects of the ply spliced structure on the four-point bending strength because of the loading features and the fracture mode.
Noble metal catalysts growing on polyurethane foam monoliths by electroless plating deposition method for formaldehyde purification at room temperature
Authors: Xu Zehua , Chen Jiawei , Feng Ying , Guan Jiankang , Dou Yongshen , Liu Sanmao , Li Yongfeng
Published: December 2019

A series of monolithic catalysts were prepared by growing noble metals of Pt and Pd on polyurethane foam (PUF) monoliths via electroless plating deposition method. The as-prepared Pt-Pd/PUF monolithic catalysts can preserve the same size, shape and macroporous network of the pristine PUF monoliths. And the noble metal active components of Pt and Pd nanoparticles were uniformly dispersed on the surface of PUF monoliths. Therefore, compared to the low formaldehyde conversion of 14% over pristine PUF monolith, the obtained Pt-Pd/PUF monolithic catalysts exhibited excellent formaldehyde purification activity at room temperature: the formaldehyde conversion can reach as high as 66%.
Improving CO2 Absorption Performance of Ca-Based By Different Additives
Authors: Chen Luhan , Sun Zhiguo , Xu Jinqiu , Jia Shichao , Wang Menglu
Published: December 2019

In this work, diffident additives (sodium citrate, sodium acetate and KCl) are used to solve the problem that the CO2 absorption capacity of limestone decreases rapidly with the increase of cyclic calcination/carbonation reactions times. The results reflected that after adding 0.5% sodium acetate, the absorption rate and decomposition rate of CO2 in CaO are 1.01 times and 2.08 times higher than that without adding, and the absorption rate and decomposition rate are 2.65 times higher than those without adding after 10 cycles, and the decomposition rate is increased by 95.8%. After the addition of 1.0% sodium citrate, the first absorption rate increased by 28%, the 10 cycles increased by 38%, and the decomposition rate of the first calcium carbonate increased by 2.4 times. After adding 0.8% KCl, although the first absorption rate decreased by 36%, the decomposition rate of CaCO3 increased by 2.08 times after 10 cycles, and by 95.1% after 10 cycles. Therefore the use of additives improves obviously the CO2 absorption of CaO.
Finite element analysis of solenoid coil for deep crack detection in cylindrical forgings
Authors: Du Wenbo , Hu Chang’an , Li Jiangang , He Min , Zhou Mingyao
Published: December 2019

The skin effect exists on the surface of the cylinder workpiece, and the existing eddy current probes cannot detect the deep cracks in the forgings. In order to improve the detecting depth of eddy current, based on the principle of electromagnetic induction, the solenoid coil size, location, etc. The influence of parameters on the eddy current penetration depth, considering the solenoid coil exciting current frequency, current density, hoisting height of solenoid coil, coil width, the thickness of the coil and the solenoid coil distance plate specimen under test, test parameters, such as adopting ANSYS software of eddy current density under different parameters with numerical simulation, analyzes the solenoid coil used for deep crack detection accuracy, on this basis, the optimal design can be used for the deep crack detection of solenoid sensor structure, It is applied to the main shaft of forgings with artificial deep crack. The simulation results show that the combined solenoid probe can be used to detect deep cracks in cylindrical forgings.
Multi-Angle Phased Array Ultrasonic Line-Scan Method for Steel Reinforced Polyethylene Electro-fusion Welded Joint
Authors: Ding Nan , Wang Zicheng , Gui Linlin , Li Yuke
Published: December 2019

In view of the difficulties and ultrasonic blind zone problems in the ultrasonic inspection of electro-fusion welded joint of steel reinforced polyethylene composite pipes, an inspection method based on phased array inspection technology, which compounds multi-angle line scan image, is proposed in this paper. It inspects by forming a plurality of B-scan images through setting up multiple line scanning channels and quick switching in the inspection process, then forming a new B-scan image after optimizing and reconstructing by computer and retaining relevant A-scan signal data for defect evaluation, thus realizing rapid and efficient real-time imaging inspection on the ultrasonic blind zone of the electro-fusion welded joint of steel reinforced polyethylene composite pipes.
Influence of the residual thickness of the interlayer on the stress-strain state in the nodes with soft interlayer
Authors: Li Qi , Xiong Ming , Liu FengMei , Yue Xiong , Yi Yaoyong
Published: December 2019

Ni3Al-based superalloys have excellent mechanical properties which have been widely used in civilian and military Fifield. In this study, the influence of the residual thickness of the interlayer on the stress-strain state in the nodes with soft interlayer was investigated by ccomputer simulation.To establish the general patterns of SSS formation when loading cylindrical nodes with interlayers of soft rigidity and checking the adequacy of the simulation, thickness of interlayer (0.01, 0.03, 0.05, 0.08mm) were calculated. The result shows that in all the thicknesses of the interlayer, both in the main material and in the interlayers, the nature of the distribution and the magnitude of the stiffness coefficients of the stressed state kstiff are practically identical. In the base metal, over most of the joint length, this coefficient is close to 1, decreasing to 0.88 in the nodes with “soft”. This corresponds to the general laws of mechanics and confirms the adequacy of the results of computer simulation.
Influence of Intense Solar Radiation on Long-span Steel Structures
Authors: Mao Jiayi , Xiao Jianchun , Zhang Hanming , Tang Tao
Published: December 2019

The temperature distribution of a long-span structures is not uniform due to solar radiation. Assumptions of uniform and nonuniform temperature field make the analysis results different. A mathematical model of solar radiation is established to calculate the hourly radiation intensity on the surface of a building at any geographical location. The temperature distribution of a 100m span spherical reticulated shell located in Guiyang city in China is calculated. The mechanical performance of the structure is analysed by finite element method. The following results gives: 1. the highest temperature is 48.5°C and the lowest temperature is 23.0°C. 2. The nonuniform temperature distribution makes the deformation of the reticulated shell no longer symmetrical.
Synthesis of 2-Chloro-4-(3-Nitrophenoxy) -6-(Thiophen-2-Yl) Pyrimidine
Authors: Zhang Binliang , Zhou Yanmin , Gu Qi , Xu Shan
Published: December 2019

2-chloro-4-(3-nitrophenoxy)-6-(thiophen-2-yl) pyrimidine (8) is an important intermediate for small molecule anticancer drugs. A rapid and high yield synthetic method for 2-chloro-4-(3-nitrophenoxy)-6-(thiophen-2-yl) pyrimidine (8) was established in this work. The target compound was synthesized from the commercially available pyrimidine-2, 4, 6(1H, 3H, 5H)-trione (5) through three steps including halogenation reaction, coupling reaction and nucleophilic reaction. The structure of the target product was confirmed by 1H NM. In addition, the synthetic method was optimized. The total yield of the three steps was high up to 85%.
Temperature Field Distribution for Laser Cladding on Axially Symmetrical Parts
Authors: Jia Yunjie , Wang Keyan , Lou Liyan
Published: December 2019

Laser cladding surface modification technology is widely used to strengthen and repair the surface of axially symmetrical parts. Based on the Gauss heat source model and COMSOL Multiphysics finite element analysis software, the surface modification process characteristics of laser cladding on the rotating substrate were studied by numerical simulation. The transient temperature field distribution under different process parameters was solved. Laser cladding pool corresponding to numerical simulation parameters was photographed by infrared high-speed camera. The results show that the temperature distribution of the Gauss heat source is delayed due to the normal distribution of heat flow and the cumulative effect of heat. In addition, with the increase of the rotational speed of the substrate, a cyclic preheating temperature band will be formed on the surface. The shape of molten pool obtained by temperature field analysis is droplet shape, which is basically consistent with the actual morphology of laser cladding molten pool.
Study on Multi-influence Factors of Dry Ice Cleaning Effect Based on Orthogonal Test Method
Authors: Yin Kuang , Fang Jian , Zhang Min , Lin Xiang , Liu Jiangshan , Zhou Wenjun , Yu Jianhui
Published: December 2019

In order to apply dry ice to the insulator cleaning in power systems, it is necessary to obtain the optimal parameter range of each of the influencing factors. In this paper, a six-factor, five-level orthogonal test method is used to obtain a representative test plan. The influence level of air pressure, dry ice flow rate, cleaning distance, cleaning time, nozzle rotation speed and cleaning time on the cleaning effect were obtained. Results revealed that the optimal range for each cleaning parameter is: air pressure 0.7MPa∼0.8MPa, dry ice flow rate 2.5kg/min∼3.0kg/min, cleaning distance 10cm∼15cm, cleaning angle 10°∼20°, nozzle rotation speed 5∼15r/min, cleaning time 30s∼36s.
Underwater Cylindrical Acoustic Array Structure Design Scheme
Authors: Yang Chong , Zhou Sibin , Zhang Guoguang
Published: December 2019

In this paper, the mathematical model of cylindrical array is analyzed. A cylindrical matrix structure scheme is designed for the complex environment of the ocean. The structure of the array is briefly introduced, and the situation of the array being affected by current and tow is carried out. The calculations show that the cylindrical array can resist the horizontal current impact and maintain its stability. In extreme cases, it needs more than 50t to lift the matrix or displace the array. The double cylindrical array arrangement can be used. Automatic tracking and monitoring of underwater moving targets is achieved within 300.
Application of Q-Learning and RBF Network in Chinese Chess Game System
Authors: He Wenyang , Zhao Wenlong , Jiang Yuan
Published: December 2019

Machine game is one of the important directions of artificial intelligence research, and Chinese chess is a typical game process. This paper first introduces the game principle of Chinese chess. Then Q-learning method and evaluation function are added to train data through a large amount of self-learning. A chess game system based on Q-learning is designed and developed. The experimental results show that Chinese chess with Q-learning algorithm has the ability of evolutionary learning, which effectively improves the game level of Chinese chess.
The surface electrical analysis of Nano Polyurethane-Based Superamphiphobic composite insulation materials
Authors: Guo Kai , Wu Kai , Li Xingeng , Jiang Bo , Zhao Peng , Wu Yaping
Published: December 2019

In the early stage of this study, it was found that Polyurethane was only two ways to construct the super-hydrophobic surface. The second is to construct micro-nano structure with low surface energy materials. Specific preparation methods of superhydrophobic surfaces include heterogeneous nucleation method, plasma treatment method, etching method, sol-gel method, vapor deposition method, electrochemical method, alternating deposition method, template method, self-assembly method, solve-non-solvent method, direct film formation method, etc., and many successful examples have been achieved. The research work in this field is relatively few, and the materials involved are scattered. The research objectives are all focused on the construction of micro-nano multistage surface structures with low surface energy. At present, most of these works only test the corresponding electrical properties of superhydrophobic surfaces. In order to verify the application prospect of superhydrophobic surface in antifouling flashover, it is necessary to carry out in-depth research on its hydrophobic, fouling and discharge aspects.
Experimental Research of Polyurethane Filled Double Skin Steel Tube
Authors: Wu Menglei , Mi Xufeng
Published: December 2019

Based on the experiments, the mechanical properties of polyurethane filled double skin steel tubular (PFDSST) members with different hoop coefficients and slenderness ratios under axial compression have been studied intensely.
Implementation of Robot System for Multi-user and Multi-robot Based on Cloud Platform
Authors: Yin Lang , Yan Guanghui , Cao Yingjian , Liu Beng , Feng Jianyong , Zhang Meng , Liu Ting
Published: December 2019

With the rapid development of the complexity and diversification of robot services, large number of data processing and analysis problems occurred during the robot working process. In this paper, we designed a collaborative system consisted multi-user and multi-robot based on cloud platform. By pre-setting the rights and restrictions owned by each user in different scenarios, the server determines the scene in which the robot is located by the picture taken by the robot, thereby giving each user different permissions. Enable the robot to listen to the user’s instructions to protect privacy. The integration of cloud technology and multi-robot systems made it possible to improve energy efficiency, real-time performance and reduce memory cost.
Axial Crashing of Folded Thin-Walled Tubular Structure with Various Cross-Sectional Shapes
Authors: Zhang Feifei , Zuo Qiyang , He Kai , Fang Haitao
Published: December 2019

Many thin-walled tubular structures have been widely applied to absorb the impact energy during vehicle crash accidents. Literatures prove that the energy absorption performance of the tubular structure is closely associated with its cross-sectional shape. Here in this paper, a series of folded tubular structures that have various cross-sectional shapes, including triangle, square, hexagon and circle, are proposed, and the crashworthiness characteristics of these structures are compared and analyzed based on finite element simulation. It is found that folded tubular structure with more cornered cross section has better energy absorption performance. The parametric analysis results also indicate that the energy absorption performance of the folded tubular structure improves with bigger thickness.
Synthesis and adsorption properties of acrylic acid/styrene binary copolymer resin
Authors: Tang Jian , Wang Yifei , Huang jiannan , Wang Shifan
Published: December 2019

In order to improve the adsorption of heavy metals in polyacrylic hydrogels, the experiment uses acrylic acid and styrene as raw materials, potassium per sulfate as initiator, and ethylene glycol as crosslinker to synthesize polyacrylic acid/styrene hydrogel. The effects of monomer ratio, acrylic acid neutralization degree, crosslinker dosage and temperature on product properties were studied by orthogonal test. In addition, the copolymer was characterized by fourier transform infrared spectroscopy. The adsorption of heavy metal performance test found that when the ratio of acrylic acid and styrene is 1:0.2, the degree of neutralization is 65%, the crosslinker accounts for 1.0% of the monomer mass fraction, and the temperature is 65 °C, the polyacrylic acid/styrene copolymer hydrogel is optimal. The adsorption of Pb2 + in the optimal group was 328.25 mg/g.
Preliminary Study on Caproic Acid Production by Compound Bacterial Agent of Luzhou-Flavor Liquor Pit Mud
Authors: Li Junwei , Zhang Chao , Xu Qiushuo , Lin Sun , Liu Zhanqi , Dong Xiaoyuan
Published: December 2019

Pit mud plays an important role in the fermentation of Luzhou-flavor liquor, It is a common problem for Luzhou-flavor liquors when the mud is aging and the fragrance is not prominent.Choose high quality mud, Inoculating the mash extract as a mixed bacterial solution in sodium acetate medium, Anaerobic culture method to increase the activity of anaerobic microorganisms, Increase hexanoic acid production; Characterization of hexanoic acid by color reaction of copper sulfate diethyl ether, Determination of hexanoic acid by gas chromatography, Its output is in the range of 1.5g/Lto 3.6 g/L, This is the production of mud maintenance liquid, Technical support is provided to prevent aging of the mud and improve the fragrance of the main body.
Sulfur-doped Bi2Se3 Monolayer as Potential electrode Materials for Mg-ion batteries
Authors: Jin Wei , Wang Zhiguo
Published: December 2019

Magnesium-ion batteries (MIBs) are a front-runner among the alternative battery technologies suggested to substitute the state-of the-art lithium-ion batteries (LIBs). Searching for proper electrode materials for MIBs is critical for the development of MIBs. Using density functional theory (DFT) calculations, Bi2Se3 monolayers with sulfur-doping as potential electrode materials for MIBs were investigated in this work. The effect of S doping on adsorption and diffusion behaviors of Mg ions was mainly studied. The results showed that Mg atoms first prefer to occupy the H sites of both perfect and S-doped Bi2Se3 surfaces. Doping of S atom reduces the corresponding adsorption energy and diffusion barrier of Mg on the surface. The present results give expectation of excellent battery performance by S doping and it is one way to improve electrode materials for the fast charging/discharging of MIBs.
Research on Environmental Accounting Information Disclosure under the Background of Sustainable Development
Authors: Xiao Yumin
Published: December 2019

At present, the economy is developing rapidly, and the environmental problems brought about by it are becoming more and more serious. Environmental pollution caused by smog and carbon emissions has become an important factor affecting the sustainable development of the national economy. Therefore, corporate environmental accounting information disclosure has received more and more attention, and countries have gradually realized that environmental information disclosure through economic means is an important channel for obtaining corporate environmental activities. This paper first expounds the scientific understanding of environmental accounting, and analyzes the relationship between sustainable development and environmental accounting information disclosure, and secondly expounds the importance of environmental accounting information disclosure, Finally, suggestions are made for improving the way and quality of corporate environmental accounting information disclosure.
PN Modified Differential Game Strategy for Two-on-one Cooperative Interception
Authors: Zhang Jiaqiang , Lou Yuanwei , Liang Xiaolong , Qi Duo
Published: December 2019

In order to deal with the Chaff, Infrared Decoy, Electronic Jamming and the escaping maneuvering of the target, two-on-one cooperative interception strategy is discussed in this paper. The planar engagement of two air-to-air missiles cooperative intercepting one target by the alliance of differential game (DG) strategy and proportional navigation (PN) guidance law is investigated. The equations of motion for two-on-one cooperative intercepting are derived first, and zero-effort-miss (ZEM) representation technique is employed. Then a linear quadratic differential game cooperative zero-sum cost function is phrased, and the cooperative control variables of two-on-one cooperative guidance law under pure DG strategy are derivate. Finally, the proportional navigation guidance law is introduced to alleviate the acceleration command oscillation. The simulation results in the ideal dynamic scenarios show that, the combination of DG and PN guidance law is effective to the two-on-one cooperative pursuit-evasion problem, especially for the high maneuvering target at the cost of much more control effort.
Modeling and Control of Methanol Engine Speed with GT-Power and Simulink
Authors: Zhang Qie , Jiang Yankun
Published: December 2019

With a 4-cylinder methanol engine as the research object, GT-Power was used to build a one-dimensional simulation model for the methanol engine and verify its accuracy. The PID and fuzzy PID control models were built based on MATLAB/Simulink, and the methanol engine model was coupled with the control models. The speed control effects of the methanol engine under different control strategies were compared and analyzed. The results showed that traditional PID control method could meet the control requirements under a singular load, but the overshoot of the engine speed step response curve under fuzzy PID control was decreased by about 12% compared with traditional PID controls methods, also showing significantly lower speed fluctuations. When the working conditions of the engine changed, the fuzzy PID control method had better engine speed control performancethe than the traditional PID control method.
Optimization of a Wearable Device for Core Body Temperature Monitoring Based on the Dual-Heat-Flux Model
Authors: Fang Jiayueyuan , Zhou Congcong , Ye Xuesong
Published: December 2019

This paper presents an improved structure of core body temperature (CBT) probe based on the dual-heat-flux (DHF) principle. A new frustum-shaped architecture of sensor, instead of traditionally cylinder-shaped, is presented to decrease the transverse heat flow which is the major obstacle to fit the DHF theory. Besides, finite element simulation is conducted to compare the heat concentration in those two structures and reveal the relationship between the measuring accuracy and the thermal conductivity of the shell. Nylon Glass Fiber Mixture (NGFC) is introduced to improve the performance of probes based on the above simulation. Finally, to verify the effectiveness of the models simulated accordingly, wearable probes based on CBT monitoring system is presented and hot-plate (produced by Thermo Scientific) experiments are carried out. The new probe shows an error, i.e. 0.09±0.05°C, at different CBTs, which promises higher stability within acceptable error in congeneric researches.
Implementation of Intelligent Trash Can Based on Voice Control
Authors: Cui Haiyan , Mao Limin , Jin Yuhao
Published: December 2019

In this paper, a smart trash can based on the voice control is proposed. The garbage bin takes the Microcontroller as the control core and has a voice interaction function, that is, according to the speech recognition function instruction, the obstacle avoidance can be automatically realized during the movement process, and when the capacity reaches the preset value, it can prompt people to clean up. Meanwhile, the status of all trash cans can be displayed on the LCD screen. After debugging, the design has diversified functions and fully demonstrates practicality.
Research on Load Distribution Algorithm of Central Heating Network
Authors: Whang Haijiao , Yang Jianhua , Lu Wei , Duang Zhipeng
Published: December 2019

Hydraulic and thermal imbalance is very common in central heating system, resulting in energy loss and poor heating experience of heat users. In order to solve the problem of hydrothermal imbalance, a control method based on Modeling and Simulation of central heating system and PSO particle swarm optimization algorithm is proposed. Firstly, the mathematical modeling and analysis of the hydraulic and thermal conditions of the central heating system are carried out, and the actual operation of the system is simulated by using MATLAB/Simulink to build and simulate the model of the central heating system. Then, the valves of each heat exchanger station are analyzed by using particle swarm optimization (PSO) with the variance of return water temperature as the control objective, and the appropriate valve openings are calculated iteratively, so as to solve the problem of hydro-thermal imbalance in the central heating system. The traditional PID control method is used to carry out comparative experiments. The experiment shows that the particle swarm optimization method performs better than the PID control method. The return water temperature of the heat exchanger station is similar, and it can meet the heating demand better.
Optimization of Flow Field and Nox Concentration Field of Denitrification System in Coal-Fired Power Plant
Authors: Jiang Long
Published: December 2019

A unit of a coal-fired power plant in North China was selected to study. The flow field distribution and NOx concentration distribution at the inlet and outlet of the denitrification system are tested. Then, the flow field adjustment and optimization of the unit are carried out based on the above test results, and the verification test of optimized flow field and NOx concentration distribution are carried out. After the flue optimization, the uniformity of NOx concentration distribution at SCR reactor inlet and outlet was improved, and the flue rate at SCR reactor inlet need further optimization through combustion adjustment.
Research on the Evaluation of the Developmental Potential in Guangdong’s Listed High-Tech Enterprises under the Policy of Guangdong-Hong Kong-Macao Greater Bay Area
Authors: Liang Weiqi , Kong Yinying , Huang Jiankui , Zeng Jiajun
Published: December 2019

In order to make a scientific evaluation on the development potential of the listed high-tech enterprises of Guangdong-Hong Kong-Macao Greater Bay Area, providing useful advice for investors, enterprises and government, this paper put forward the significant concept of development potential evaluation system of the listed high-tech enterprise in Guangdong-Hong Kong-Macao Greater Bay Area. Combined with the analytic hierarchy process and the entropy method, we determined each indicator with weight, summarized the information of indicators and examined the status of developmental potential of the high-tech enterprises for each year.
Solar Photovoltaic Power Generation Technology Research
Authors: Wang Yaoyao
Published: December 2019

This paper studies solar photovoltaic power generation technology, including solar photovoltaic grid-connected power generation technology, solar photovoltaic micro-inverter technology, solar photovoltaic power generation electrical automation technology, and puts forward Suggestions on solar photovoltaic power generation.