bluuebunny/crossref_metadata_2025_split huggingface dataset:
Improving the accuracy of old and young face detection in the template matching method with Fuzzy Associative Memory (FAM)
Authors: Sembiring Rafika Sari , Efendi Syahril , Suwilo Saib 
Published: January 2020

Abstract
Every human has a face pattern and certain characteristics even though identical twins, but the human face pattern still has its own distinctiveness as well as old face patterns and young face patterns even though the human face pattern is very diverse but for young and old face patterns will be a difference between one face and the other face. Face detection (face detection) is one of the initial stages that very important in face recognition that is used in biometric identification. Face detection can also be used to search or index face data from images or videos that contain faces of various sizes, positions, and backgrounds. Face detection (face detection) automatically with the help of a computer is a problem that is not easy because the human face has a high level of variability both intra-personal and extra-personal variability. This study shows that systems with template matching methods combined with FAM can successfully detect differences in human faces, 80% accuracy, 10% better by using ordinary template matching.
Modification of variably modified permutation composition (vmpc) algorithm genetic key algorithm for data security
Authors: Ompusunggu E S , sawaluddin  , Nababan E B 
Published: January 2020

Abstract
Cryptography is the study of mathematical techniques related to information security aspects such as validity, data integrity, and data authentication. In this study, Variably Modified Permutation Composition (VMPC) algorithm is modified by adding complementary methods to the encryption and decryption process. Keys that are generated randomly will be optimized using Genetic Algorithm. The Variably Modified Permutation Composition (VMPC) algorithm is a symmetrical stream cipher algorithm similar to the RC4 cipher designed by Bartosz Zoltak. The Variably Modified Permutation Composition (VMPC) algorithm is an extension of the one-way function VMPC that was developed into a byte-based encryption algorithm. In its use the VMPC is generated by an 8-bit stream of 256 element permutations. The initial state of the permutation is calculated in VMPC Key Scheduling. The Genetic Algorithm produces a unique intermediate key for each algorithm run. The intermediary key is combined with the Ciphertext in the first level which produces the second level Ciphertext, up to the third level Ciphertext. Attackers will not be able to carry out attacks such as brute force, differential attacks or statistical attacks without having knowledge of the key. From the results of the tests carried out, the more characters that are encrypted and decrypted, the longer it will take. On testing the avalanche effect produces an average value of 51.25% for keys without optimization while 53.42% for keys optimized. The effect of key optimization using Genetic Algorithm has increased the value of the avalanche effect and has an effect on the results of changing bits in the ciphertext.
Increased accuracy in the classification method of backpropagation neural network using principal component analysis
Authors: Sitompul Kristin Lorensi , Zarlis Muhammad , Sihombing Poltak 
Published: January 2020

Abstract
Water and air in life are needed in every human and living creature on earth, especially with the status of water quality and air quality status that must be known to humans. Water and air quality status has 120 records with 8 attributes consisting of 4 classes and 1096 records with 5 attributes consisting of 6 classes. Water and air quality classification can affect performance in data grouping. So from that the author tries to increase accuracy in classification by using the Neural Network Backpropagation algorithm with PCA. In this study, it is expected that the Backpropagation Neural Network algorithm using PCA is able to increase accuracy in the classification method.
Analysis of RSA variants in securing message
Authors: Nasution Nadia Widari , Efendi Syahril , Sawaluddin  
Published: January 2020

Abstract
Message security is an important thing to prevent the interference from third parties. RSA cryptographic algorithm is believed to be a powerful algorithm in securing message. However, RSA computing process takes a long time so it takes several variants of RSA, namely R prime RSA and Multi-factor RSA which can reduce time and computing cost on the encryption and decryption side. In this paper, the author use three prime numbers to improve better security than only use two prime numbers and minimize the value of private key “d” is by using Chinese Reminder Theorm (CRT).
Effect of inventory turnover on the level of profitability
Authors: Nasution Abdillah Arif 
Published: January 2020

Abstract
This study aims to determine the effect of inventory turnover on profitability in automotive companies listed on Indonesia stock Exchange from 2015-2017. Profitability is measured by Return On Assets (ROA). The data used are the financial statements of each sample company, which are obtained through ICMD (Indonesia Capital Market Directory) The analytical method used in this study is a quantitative method, by testing classical assumptions, as well as statistical analysis, namely simple linear regression analysis. The sampling method used is purposive sampling. The variables of this study are inventory turnover as variable X, and Return On Assets as Y variables with a total sample per year of 18 companies. The results of this study are inventory turnover does not have a positive effect on Return On Assets.
Analysis of waveguide with special resonant window which can reduce the energy consumption of waste rubber pyrolysis
Authors: Liu Qiangcai , Su Xin , Hu Lihao , Zhao Xianbing , Li Zhihua 
Published: January 2020

Abstract
Microwave pyrolysis is a new technology for waste rubber treatment. In this paper, the microwave energy transfer characteristic working at a frequency of 2.45 GHz in different types of rectangular waveguides are investigated with HFSS simulation software. The results show that although the quartz sealing plate of the rectangular waveguide can prevent the combustible gas generated by waste rubber pyrolysis from entering the microwave generator, it also causes some microwave reflection at the same time, which will reduce the microwave energy transmission efficiency, shorten the service life of the microwave generator. While the resonant window of the rectangular waveguide, that is, a rectangular window with a certain size in the centre of the copper sealing plate, and with a quartz plate embedded in the window, can avoid such microwave reflection, not only enhance the sealing performance, but also improve the waste rubber pyrolysis efficiency and reduce the pyrolysis energy consumption.
Nano layered-spinel 0.8Li2MnO3 · 0.2LiMn2O4 as high-performance cathode for Li-ion batteries
Authors: Zhu Zhenye , Zhuo Sang 
Published: January 2020

Abstract
The nano layered-spinel 0.8Li2MnO3·0.2LiMn2O4 cathode material has been synthesized by a simple solvothermal method. X-ray diffraction studies show that the as-prepared material has two compositions, including Li2MnO3 and LiMn2O4. Moreover, the surface morphology of the precursor and cathode material were characterized by scanning electron microscopy. Meanwhile, the EDS graph reflects homogeneous mixing of the two compositions due to the novel precursor synthesizing method. Consequently, as a cathode material for LIBs, the resulting nano layered-spinel 0.8Li2MnO3·0.2LiMn2O4 achieves a high discharge capacity of 248 mA h g−1 at 25 mA g−1 and 162 mA h g−1 even at 1250 mA g−1. In addition, the cathode material shows a high reversible capability with 180 mA h g−1 after 50 cycles, which delivers medium cycling performance.
Used of bottom ash waste from power plant and tailing as mine backfill
Authors: Masniyom M , Jaiboon W 
Published: January 2020

Abstract
The using of bottom ash and tailing were by product from Mae Moh coal fired power plant as mine backfill. Laboratory was investigated the chemical, physical and mechanical properties of backfill containing bottom ash, tailing and cement. Using cast of backfill materials to test the ability of compressive strength in box size 5×5×5 cm. Four different types of backfill that portland cement type 1 was replaced by bottom ash, in the proportion of percent 5, 10, 15 and 20 by weight uncured and cured in water for 7 and 28 days. Backfill materials characterization bottom ash have been examined in grain size distribution, chemical composition analyzed by X-ray fluorescence (XRF) of backfill material. For the mechanical property was test by uniaxial compressive strength machine. The result was found that mixing ratio of bottom ash can be used as backfill material ranging from 15-20 % by weight. The mechanical property of backfill mixture suitable for use with compressive strength from 6.4-19.7 MPa and cured in water 28 days was maximum compressive strength.
Experimental research on sound absorption properties of impedance gradient composite with multiphase
Authors: Liu R X , Pei D L , Wang Y R 
Published: January 2020

Abstract
In order to improve the sound absorption performance of the sound absorbing material in water, impedance gradient underwater sound absorbing composite with multiphase (IGCM) is prepared in this study. By superposing several layer materials of different impedance gradients, the mixture is poured in the mold layer by layer so that three kinds of IGCM with different mass density gradients of iron powder, tungsten powder and mixture of iron powder and tungsten powder are prepared. Under two operating conditions of the incident angle of 0°and 20°, the results show that the three IGCMs have good broadband absorption characteristics. The sound absorption frequency ranges of the three samples of IGCM under normal incident conditions are concentrated between 6kHz and 10kHz. The sound absorption performance of IGCM under oblique incidence is better than that under normal incidence, especially the IGCM with iron-tungsten powder, which could achieve wide-band strong sound absorption from 2kHz to 10kHz under the condition of oblique incident. The IGCM with iron-tungsten phase under sound wave’s incident angle of 20 ° exhibits better sound absorption performance than the other two, which provides a theoretical reference for the design and manufacture of gradient sound absorbing materials.
Influence of welding groove on residual stress and distortion in T-joint weld
Authors: Wei Chong Yi , Jiang WenGuang 
Published: January 2020

Abstract
T-joint welding is the most common type used in heavy equipment industry. Localized heating and subsequent cooling induce residual stress in the weld process. Service loading overlapped with residual stress influences the strength of the welded structure and leads to premature failure of structure. In this study, finite element analysis is used to study the influence of welding groove on residual stress and distortion in T-joint welding. The simulation consists of sequentially coupled thermal and elastic-plastic analysis using an element birth and death method to model the addition of weld metal to the workpiece. The results of numerical simulation are verified by comparing with experiment from published literature. The results show that welding groove has a significant influence on welding residual stress.
Effect of Ca/K Modified ZSM-5 on Catalytic Cracking of Low Carbon Olefin
Authors: Liu Xiaohua , Huang Wenqing , Man Yi , Wang Dingbo , Jiang Jianzhun 
Published: January 2020

Abstract
In this paper, the structural and acidic changes of ZSM-5 zeolite modified by K and Ca were studied. Meanwhile we use in-situ FTIR to study the reaction of isobutylene on ZSM-5 zeolite before and after modification, investigating reaction mechanism and optimal reaction time. The results shows that the amount of weak acid increases in the modified zeolite. The Ca-ZSM-5 can not only effectively control the hydrogen transfer reaction to inhibit the formation of aromatic hydrocarbons, but also promote the occurrence of dehydrogenation cracking reaction; while the K-ZSM-5 is not effective in the cracking reaction.
Study of the Dielectric Properties of Condenser Material Used in SF6 Insulated RIP Bushing
Authors: Shiling Zhang 
Published: January 2020

Abstract
All In the frequency range of 10−1∼106Hz and the temperature range of -100∼200°C, the experimental dielectric spectrum of the condenser material used in UHVDC RIP bushing has been measured by Novocontrol broadband dielectric spectroscopy. The measured data has been fitted applied to nonlinear numerical calculation of the Havriliak-Negami (HN) equation, by which the characteristic parameters of HN mathematical model have been got. The studies show that the genetic algorithm combining with the least-square curve fitting method can ensure the uniqueness and accuracy of the fitting parameters. In the frequency range of 10−1∼106Hz and the temperature range of -40∼60°C, β relaxation process mainly takes place in the condenser material. In temperature range of 70∼150°C, α and β relaxation processes can be observed. In the temperature range of 160∼200°C, the α relaxation and DC conduction processes are obvious. The DC conductivity and relaxation time have significant temperature dependence which can be fitted well with Arrhenius equation.
The design of swirl burner in a pulverized coal gasifier by numerical analysis
Authors: Dachuan Qin , Bing Li , Mingquan Wang , Chao Yang 
Published: January 2020

Abstract
In this paper, the eddy-dissipation-concept model is used to simulate the influence of burners of different structures on the performance of gasifier. The effects of the annular inner and outer passage, annular air passage and annular pulverized coal passage on the spatial distribution of flow field, temperature field and grouping field in gasifier were investigated. The simulation results show that pulverized coal can obtain higher carbon conversion rate by going through the annular outer passage of the burner. As the number of air swirl S increases, the high temperature flame in the gasifier becomes more dispersive and the temperature gradient becomes smaller. The high temperature flame zone in the gasifier is more diffuse when pulverized coal goes through the annular outer channel than the annular inner channel, which can reduce the temperature of the high-temperature flame zone.
Layers obtained on TiCN aluminum nanocomposites by electron-beam treatment
Authors: Lazarova R , Valkov S , Dyakova V , Petrov P 
Published: January 2020

Abstract
The impact of electron beam treatment on aluminum composites containing 0, 2, 5 and 10 wt. % TiCN nanoparticles was studied. Aluminum nanocomposites were produced as rods with 12 mm diameter by means of preliminary cold volume compression and succeeding hot pressing. Cylinders with a height of 10mm were cut from the rods and their flat surfaces treated by scanning electron beam techniques. The electron-beam treatment (EBT) process was carried out using Leybold Heraeus (EWS 300/15–60) electron beam equipment. Two technological regimes were used: with low energy power input Q1 and with high energy power input Q2. Composite layers with a strong bond to the substrate were obtained. Light microscopy (LM), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX) were used for characterizing the microstructure. The phase composition of the obtained specimens was studied by means of X-ray diffraction (XRD) using CuKa characteristic radiation (λ=1.54 Å). The microhardness was discussed with respect to the applied technological conditions of the EBT and corresponding microstructure and crystallographic structure of the formed layers. Nanocomposite layers with improved hardness were obtained which is necessary as exploitation surface properties of automobile and aircraft parts. It was found out that the microhardness of samples treated with high energy was much lower than the one of the samples treated with low energy. The strengthening mechanism in the samples was discussed.
A monolithic integration scheme for GaN-based power converter integrated circuit using fully-Schottky versatile HEMTs
Authors: Wang Zeheng , Luo Yi , Chen Chao , Chen Zhanzhuang , Feng Xuewei , Yao Yuanzhe 
Published: January 2020

Abstract
A monolithic integration scheme for GaN-based power converter integrated circuit is proposed in this paper, wherein the scheme is based on a novel versatile HEMT architecture featuring full-Schottky contacts. By simply introducing only one type of device for building both field effect transistors and diodes, the power converter ICs could be realized in a compact way. In addition, this scheme avoids harmful high temperature process which is for forming ohmic contacts in some nitride semiconductors. In this sense, this scheme could significantly reduce the complexity of the integration, and therefore, promisingly enable higher device performance.
Construction of high sensitivity non-enzymatic glucose sensor based on three-dimensiona nickel foam supported Ni2P/NiO/CeO2 nanoflake arrays
Authors: Qin Yongqiang , Wang Yan , Yu Cuiping , Cui Jiewu , Yu Dongbo , Wu Yucheng 
Published: January 2020

Abstract
Three-dimensional (3D) nickel foam supported Ni2P/NiO/CeO2 nanoflake arrays (NFAs) were synthesized by hydrothermal, anneal and low-temperature phosphatizing processes. As-prepared samples were systematically researched by SEM, XRD, XPS, TEM, EDS and HRTEM technology. Cyclic Voltammgrams and Chronoamperometry technology were used to measure the sensors performance of Ni2P/NiO/CeO2 NFAs. The results indicated that non-enzymatic glucose sensors based on Ni2P/NiO/CeO2 NFAs exhibited a high sensitivity of 28.23 mA cm−2 mM−1 and good anti-interference ability, suggesting that the 3D nickel foam supported Ni2P/NiO/CeO2 NFAs as a non-enzymatic glucose sensor is promising for practical applications.
Study on Preparation of Microlens Array Hydrophobic Flim by Ultraviolet Curing Micro-imprint
Authors: Jiajia Wang , Jianyun He , Zengqiang Shen , Xu Ma , Weimin Yang 
Published: January 2020

Abstract
In this paper, the formation process of microstructure array hydrophobic film prepared by ultraviolet curing imprinting was studied. The UV-curing micro-imprinting method was used to replace the traditional hot stamping method to prepare the micro-structured hydrophobic film. The effects of illumination time and intensity on the surface hydrophobicity were investigated.Results shown that the micro-structure hydrophobic film prepared by UV-curing micro-imprint has high replication precision and good hydrophobic effect. With the increase of illumination time, the water contact angle of the product increased and reached to 125° at 30s illumination time. With the increase of the illumination intensity, the water contact angle of the micro-imprinted product was also gradually increased.
Synthesis and characterization of a luminescence podand bridged dipyridyl platinum(II) complex
Authors: Zheng Xiaorui , Mao Ming-Zhen , Huang Xiao-ying , Wang Lieping , Ning Binke 
Published: January 2020

Abstract
We have designed and synthesized an aromatic podand containing two dipyridyl plantinum complexes in both ends of the podand, of which the luminescence in solution is reversibly fabricated by adding equal equivalent of dibenzylammonium hexafluorophosphate and base. The results are obtained by absorption and emission spectroscopy and 1H NMR spectroscopy.
Influencing factors and experimental study on performance of composite cement-based grouting
Authors: Du Tianling , Liu Ying 
Published: January 2020

Abstract
The performance of grouting material directly affects the grouting effect under cement concrete pavement slab. In this paper. the factors affecting the fluidity, strength and bleeding rate of grouting materials are analysed by repeated tests. The test results show that the slurry with good suspension is not easy to be diluted by water and has certain waterproof performance; The water-cement ratio is in the range of 0.35 to 0.5, and the suspension is good and not easily separated; Incorporation of fly ash will cause early strength reduction and increase of slurry bleeding. It is recommended not to exceed 50% of cement. Finally,it is suggested that the strength of the grout should not be as high as possible, and the problem of strength development at the late stage of grouting and matching of the strength of the base layer should be fully considered.
Experimental study on the bonding of microfluidic chip
Authors: Jinghui Zhang , Jianyun He , Xidan Luo , Jinge Tong , Xu Ma , Weimin Yang 
Published: January 2020

Abstract
In this paper, the ultraviolet radiation curing technology is applied to the processing and manufacturing of microfluidic chips, and a new method of irradiation bonding of photocuring microfluidic chips is studied. Research has shown that by photocuring bonding method, the bonding strength of the photocuring microfluidic chip is high, the bonding speed is fast, the efficiency is high, and since the auxiliary solvent such as adhesive is not needed, the microchannel is not polluted, and the permanent bonding is realized. This new method of photocuring bonding has effectively solved the bonding problem of the microfluidic chip and the photocuring bonding strength satisfies the application requirements.
Effect of the in-situ polymerized polyurethane on laminated epoxy adhesive / aramid fabrics composites
Authors: Guang Lei Lv , Rui He 
Published: January 2020

Abstract
In order to avoid the high brittleness of epoxy resin and the low peeling strength of its laminated composite, polyurethane was synthesized by in-situ polymerization in epoxy adhesive system. The results of IR, SEM and mechanical properties test showed that the peel strength and shear strength of laminated epoxy adhesive / aramid fabrics composites reached the optimum value when the molar ratio of NCO/OH was 1.2, the content of MoCA curing agent was 1.5% and the content of polyurethane prepolymer was 20%. The brittleness of epoxy resin was reduced to a certain degree, and the bonding properties of epoxy adhesive/aramid fabrics composites were improved.
First-principles investigations of structural, elastic, thermodynamic and electronic properties of Pt3Hf compound under pressure
Authors: Li Zongbo , Xiong Kai , Sun Yingjie , Chen Xiuhua , He Junjie , Zhang Shunmeng , Fu Yingjie , Mao Yong 
Published: January 2020

Abstract
The pressure effects on the structure, elasticity, thermodynamics and electronic properties of Pt3Hf compounds were investigated by first-principles calculations based on density functional theory. The obtained equilibrium lattice parameter is consistent with the experimental and theoretical values. The calculation results show that the elastic constants, bulk modulus, shear modulus, Young modulus, anisotropy factor and Debye temperature, sound velocities increase with the increase of pressure. The B/G ratio and Poisson’s ratio results show an upward trend with increasing pressure, which means that increasing external pressure can enhance the ductility of Pt3Hf compound. Analyzing the charge density difference and the density of states reveal that charge accumulation gradually increases with the increase of pressure between Pt and Hf atoms.