bluuebunny/crossref_metadata_2025_split huggingface dataset:
Construction of IoT management system for intelligent monitoring of distribution room
Authors: Ma Wenjie , Wang Yanru , Guo Wenjing , Bao La , She Rui 
Published: June 2021

Abstract
In order to further improve the quality and efficiency of distribution network operation and maintenance work, and support the transformation of distribution network technology to digital, lean, and intelligent, this article proposes an IoT management system for intelligent monitoring of power distribution rooms, as well as a design plan for IoT management platforms and edge IoT agents. It also conducts key research on the environmental information monitoring and perception system of the power distribution room, the power protection and security perception system, and establishes an intelligent and visualized intelligent distribution room to realize the digital transformation and intelligent improvement of the operation and maintenance of the power distribution network. The results are applied in the construction of Zhejiang intelligent distribution room, providing important guidance for the standardized construction of intelligent distribution room in China.
Research on the Influence of User Perceived Overload on Information Avoidance Behavior from the Perspective of Human-Computer Interaction
Authors: Miao Yunting , Shu Xiajun 
Published: June 2021

Abstract
With the development of network informatization, users can obtain a large amount of information in the process of human-computer interaction to provide a basis for self-determination. At the same time, the huge amount of information has also caused users to produce fatigue and negative usage behavior to a certain extent. The study collected 452 valid questionnaires through the questionnaire survey method, and the results showed that users’ perception of information overload and function overload positively affect information avoidance behavior from the perspective of human-computer interaction, while social overload has no significant impact on information avoidance behavior. The research conclusions help to further understand the impact of user perception overload on user information avoidance behavior, and provide enlightenment for information dissemination and function setting in human-computer interaction.
Thermal error compensation method for CNC machine tools based on deep convolution neural network
Authors: Du Liuqing , Lv Faliang , Li Renjie , Li Baochuan 
Published: June 2021

Abstract
To avoid the resetting of temperature-sensitive points caused by seasonal and weather changes and the influence on the accuracy of the thermal error model, a thermal error prediction and compensation method for CNC machine tools without preselected temperature-sensitive points was proposed based on deep learning method. The original temperature data of the CNC machine tool were converted into thermal images and directly serve as the input of the deep learning network. To improve the prediction accuracy of the thermal error model, a thermal error model of CNC machine tool with 10 hidden layers was constructed by using the powerful image feature learning ability of deep convolution network. The nonlinear mapping relationship between temperature image and thermal error without pre-selection of temperature key points was established, and more relationships between thermal error and temperature feature of a machine tool were retained. STM32F4 microprocessor was used as thermal error compensation controller to develop software and hardware system. The application experiment of the thermal error compensation system is carried out on the CNC grinder, and the effectiveness of the thermal error compensation system is verified.
Optimization of Hardware and Software Design for New Artificial Anal Sphincter Low Power System
Authors: Han Ding , Yan Guozheng , Kuang Shuai , Wang Wei , Hua Fangfang , Wang Lichao 
Published: June 2021

Abstract
Most artificial anal sphincters have a large power consumption, which is not suitable to long-term implantation of the system in the human body to help patients with anal incontinence recover. In this article, in order to reduce the system power consumption, both hardware and software optimization design have been considered. For hardware, both motor drive module and sensor module have been optimized for long-term implantation of the system in the human body. On the other side, for software, a low-power system is designed and optimized. According to the relationship between the sampling period and power consumption, the best sampling period is determined. Due to the huge difference in power consumption between the working mode and standby mode of the communication module, a new wake-up mechanism is designed for the communication module, so that the power consumption is further reduced. In the vivo experiments, the results show that the standby time can be up to 13 days when using the optimization system, which is extended significantly compared with the previous artificial anal sphincter.
Fluorine Modification over Activated Carbon Electrodes Enabling Stable 3 V Supercapacitor Operation
Authors: Wu X , Bai Y , Yang C , Li H , Chen W , Han X 
Published: June 2021

Abstract
High-energy-density electrochemical supercapacitors are required by various fields in modern society. Low-temperature plasma technology is used to produce fluorine-containing functional groups on the surface of the activated carbon electrode in CF4 gas. The passivation layer formed by the fluorine element on the electrode surface can effectively prevent the electrode material from reacting with the electrolyte, which leads to the breakdown of the electrolyte during the charging and discharging process of the supercapacitor and the destruction of the electrode material structure. After 12,000 charge-discharge cycles at 3 V, the capacitance retention rate of supercapacitors modified by fluorine for 9 minutes is 91.81%, which is 30.95% higher than that of the control group. In addition, the specific capacitance of the electrode has also increased to a certain extent.
Oil-Infused Slippery Surface on Al Substrates Fabricated by Chemical Etching
Authors: Wang Qiulin , Wu Song , Zhang Haoqun , Sun Jing , Pan Weihao 
Published: June 2021

Abstract
In recent years, the oil-infused slippery surfaces inspired by Nepenthes pitcher have potential applications in domestic and industrial fields due to their excellent water repellence. However, the current preparation methods of the oil-infused slippery surfaces have the disadvantages of time-consuming, expensive equipment and complex processes. In our research, we reported an approach to prepare the oil-infused slippery surface with multi-functional applications by simple chemical etching. First, Al plates were etched by hydrochloric acid solution and modification with lower surface energy. Then, the as-prepared samples were immersed into the lubricant oil. After that, the oil-infused slippery surface with a water slide-off angle of 3° was obtained. The freezing rain tests, chemical stability tests, and self-cleaning tests were conducted on original Al plate and the as-prepared sample. This work will enrich the preparation methods of the oil-infused slippery surfaces.
Modeling and simulation of ammonia hydrogen reactor based on COMSOL
Authors: Yang F , Liang Q C , Qiao R P , He J N 
Published: June 2021

Abstract
In this paper, the optimal experimental conditions for the ammonia thermal cracking reaction with Ni-TiO2-Al2O3 complex as the catalyst were obtained through experimental studies, and the designed ammonia to hydrogen reaction generator was modeled and the parameters of the ammonia thermal cracking reaction were simulated and analyzed by COMSOL Multiphysics software based on the experimental data.
The results show that the reaction is basically completed at the inlet flow rate of 1.5 L/min, the reactor temperature range of 500 °C-750 °C, and the molar fraction of remaining ammonia at the outlet is about 1 wt%, which indicates the feasibility of the model and verifies the accuracy of the experiment in reverse.
3D printing of HAp/xSiO2 ceramic scaffolds for potential bone graft reconstruction
Authors: Zhang Chengyu , Chen Jimin 
Published: June 2021

Abstract
HAp has drawn great attention in recent years for its similarity to the inorganic component of bone and can be used as a biocompatible implant. However, the application is limited for its poor shape ability and low degradation ability. With the help of Digital Light Processing 3D printing technology, this study proposed a method for the fabrication of bone remodeling scaffolds with high complexity. In addition, this study found that the silica addition will help densify the HAp ceramic and make it transform to a more biodegradable TCP phase at low sintering temperature.
A density functional theory study on thermal properties of perfect and defective graphene
Authors: Zou Xue , Liu Tongyu , Li Yingmin , Xu Xiaochen 
Published: June 2021

Abstract
In present work, the graphene with various defects have been investigated by First-principles based on DFT, and the properties are compared to perfect graphene. The calculated results show that the topological structure exhibits the minimum defect formation energy, which will be the easiest defective structure to form. The Perfect graphene, Single-vacancy graphene and Double-vacancy graphene exhibit metallicity, but the electrical conductivity of Perfect graphene is not as good as vacancy defective graphene. The Topology graphene is semiconductor. Single-vacancy defect emerging in graphene will pin the C atoms along with the vacancy. The C atoms closest to vacancy is easy to loosen in Double-vacancy graphene. The Topology graphene is comparatively stable in defective graphene.
Modeling and simulation of solid oxide fuel cell under different environmental conditions
Authors: Junneng HE , Runpeng Qiao , Qianchao Liang , Fan Yang 
Published: June 2021

Abstract
This article firstly based on Matlab/Simulink software to model and simulate the solid oxide fuel cell (SOFC), obtain the SOFC volt-ampere characteristic curve, and verify the correctness of the model; secondly, according to the existing 1KW SOFC in the laboratory, the stack has determined the initial parameters of the simulation, simulated the effects of the air inlet pressure and the nitrogen-oxygen ratio on the SOFC output voltage and electrical efficiency, and compared the analysis with the fuel inlet pressure. Finally, the conclusion is drawn: air inlet the increase in pressure can significantly increase the output voltage and electrical efficiency of the stack, and the increase in the oxygen content of the cathode intake increases the output power of the stack.
New method to prepare corona resistant polyimide composite film
Authors: Zhang Mingyu , Wang Ya , Jiang Hulin 
Published: June 2021

Abstract
Polyimide composite materials have gained considerable importance as high-performance polymers and matrices. These materials are used in microelectronic and electrical industries because of their excellent heat resistance, good chemical stability, and low thermal expansion. Polyimide films are mainly prepared by the flow casting method. Polyimide films are produced via dip coating method, and ion exchange method based on the surface of the polyimide can be etched and modified. The advantages and disadvantages of the existing production process of polyimide film were summarized. A new type of corona resistant polyimide composite film with a certain thickness of pure polyimide layer in the middle and a certain thickness of polyimide/alumina hybrid layer on the upper and lower surfaces is proposed aiming at the preparation of high-performance corona resistant polyimide composite film.
Study on laser cladding process parameters of Fe-based alloy based on numerical simulation
Authors: Geng Ximing 
Published: June 2021

Abstract
Using 45 steel as the substrate, laser cladding Fe-based alloy powder on the surface was proposed to improve the surface wear resistance and hardness, and partially replace the cold working die steel in the small batch production stage. ANSYS Workbench was used to simulate the heat transfer and temperature field distribution in the laser cladding process of iron base alloy. The thermal properties of the substrate and the cladding material were set up, and the finite element model was established by Gaussian heat source. The temperature field under different laser cladding process parameters was simulated to obtain the temperature distribution of molten pool. According to the metallurgical bonding between the substrate and the coating, and taking the dilution rate of the cladding layer as the basis of quality evaluation, the optimal process parameter combination of laser cladding Fe-based alloy powder of 45 steel substrate is determined as follows: laser power 1400W, scanning speed 8mm/s, spot diameter 3mm. The results provide technical data support for the engineering application of laser cladding of Fe-base alloy on 45 steel substrate.
Detectable anthropogenic changes in daily-scale circulations driving summer rainfall shifts over eastern China
Authors: Zhou Baiquan , Zhai Panmao , Tett Simon F B , Lott Fraser C 
Published: June 2021

Abstract
Wetting in the south while drying in the north during the last few decades constitutes the well-known ‘southern flood–northern drought’ (SFND) precipitation pattern over eastern China. The fingerprint of anthropogenic influence on this dipole pattern of regional precipitation trends has not been confirmed, especially for forced changes in relevant dynamics at the synoptic scale. Using a process-based approach involving model experiments both with and without anthropogenic inputs, it is demonstrated that the occurrences of daily circulation patterns (CPs) governing precipitation over eastern China during 1961–2013 have been altered by human influence. Due to anthropogenic forcing, CPs favoring SFND have become more likely to occur at the expense of CPs unfavorable to SFND. Regression analysis shows that changes recorded in the occurrence of CPs from the factual simulations could explain a large part of the precipitation trends over eastern China. CP frequencies driven by purely natural forcing do not reproduce this dipole pattern nor the inferred magnitude of precipitation trends over eastern China. These results suggest that human influence has played a critical role in shaping the contrasting north–south precipitation trends.
Microbial bioaugmentation from feces of laying hens in biogas formation on anaerobic coal media
Authors: Harlia E , Rahmah K N , Nora L , Nababan J A , Hidayati Y A , Marlina E T , Ridwan R 
Published: June 2021

Abstract
The laying hen livestock industry is growing rapidly, along with the increasing demand for eggs for human consumption, produces large amounts of waste. Improper management of laying hens farm waste can interfere with health and environmental pollution, including greenhouse gases (CH4, CO2, N2O), odor disorders, disturbances from rodent animals, disturbances of endoparasites and ectoparasites, pollution of water and soil sources. Waste management that is correct can reduce the risk of pollution of the laying hen’s industry to the environment by utilizing the feces of laying hens as a source of the microbial consortium that serves as a starter for biogas formation in anaerobic digester as an environmentally friendly alternative energy source. This study aimed to obtain a bacterial and methanogen consortium from feces of laying hens as a starter for biogas formation with coal media in the anaerobic digester. The study used an experimental method of completely randomized design (CRD) with four inoculum doses with four replicates, further tests of orthogonal polynomials. The study was conducted in two stages: the first stage was pretreatment through in-vitro techniques and adaptation process, and the second stage is the addition of the starter of microbial consortium from feces of the laying feces (bioaugmentation) into liquid media and coal at a dose of 0%, 5%, 10% and 15% incubated at 39oC for 28 days. Observations were conducted every seven days from day 0, day 7, day 14, day 21, and day 28. The parameters measured were the volume of biogas, the number of anaerobic bacteria, and the composition of biogas. This biogas composition was analyzed by Gas Chromatography, the number of anaerobic bacteria planted in Hungate tubes, and calculated using the Ogimoto method. The observations showed that the number of bacteria ranging from 1012 CFU/ml up to 1013 CFU/ml exceeded the starter requirements of 107 CFU/ml, which indicated that the microbial consortium obtained met the requirement.
Characteristics of wood pellet from sawdust pelletized with the hand meat grinder
Authors: Wahyudi  , Arifudin M , Annakotapary DIM , Sariningsih NI 
Published: June 2021

Abstract
Sawdust of three wood species, Merbau (Intsia sp.), Matoa (Pometia sp.), and Binuang (Octomeles sumatrana), are manufactured into wood pellet using hand meat grinder as pelletizer and tapioca flour and sago pulp residue used for binding agents. Sawdust and sago pulp residue were homogenized with a hammermill to obtain 60 mesh powder sizes. Concentrations of binding agents ranging from 30 - 70% based on volume/weight were employed. Hot clean water was used for mixing wood powder and the binding agents by hands. Variables of wood pellets examined are diameter and length (cm), moisture content (%), density (g/cm3), ash and volatile content (%), fixed carbon (%), and caloric value (cal./g) according to SNI 8021: 2014. The results indicate that the wood dimension for a diameter of 0.45 cm and a length of 3.78 cm on average are matched the standard. Wood pellets have an average of moisture content 16.87%, higher than the standard of 12%. Means for density and ash content are 0.8 g/cm3 and 1.54% respectively, corresponding to the standard. An average for caloric values of 4064 cal./g is exceeded the minimum value of 4000 cal./g. However, other characteristics for the volatile matter of 74% and fixed carbon of 7.19% are below the minimum recommended value that needs to be improved for the next manufacturing.
Understanding gas prices: an overview of regulations and components affecting the Indonesian natural gas prices
Authors: Iswandi E , Supriyadi I , Thamrin S 
Published: June 2021

Abstract
Natural gas is the primary commodity of Indonesia’s energy supply and an important policy issue. Domestic gas demand is dominated by the industrial, power sector, and fertilizer. Over the past five years, Indonesia’s natural gas prices have increased significantly, which will undoubtedly affect the consumers. We summarized and analyzed policy, literature, and interviews with stakeholders to find the main factors of gas prices. This study concluded that the government has a more dominant role in determining gas prices. The increase in gas prices was mainly influenced by the upstream project’s economics, the tariff for transmission, and managing natural gas infrastructure. The application of indexation with ICP and the escalation price also contributed to the high price. The Government needs to consider gas price adjustments carefully because these commodities have a multiplier effect and affect industry competitiveness.
A feasibility study of flare gas utilization through a small-scale LNG development in South Sumatra, Indonesia
Authors: Putriastuti M A C , Yusgiantoro F C , Haryanto  , Margenta I DM R 
Published: June 2021

Abstract
This study focused on assessing the economic feasibility of Small-Scale LNG (SSLNG) development from a flare gas in South Sumatra, Indonesia. The study measured profitability using three financial indicators: internal rate of return (IRR), net present value (NPV), and payback period (PP). The study also used sensitivity analysis to find selected variables that are strongly correlated with the economic aspects of SSLNG production. The variables consist of (1) Average flare gas production; (2) Flare gas price; (3) LNG selling price; (4) CAPEX; and (5) OPEX. The study also used those variables to find the optimum result with scenario analysis. The results show that the SSLNG development from a flare gas is economically feasible if three variables: LNG selling price, CAPEX, and flare gas price follow the optimum scenario.
Association of the OLR1 Gene of the 3’UTR g.8232(A/C) genotypes on milk fatty acid components in Holstein Friesian
Authors: Anggraeni A , Nadapdap Y P , Asmarasari S A , Praharani L , Hafid A , Ishak A B L 
Published: June 2021

Abstract
Dairy cattle produce milk with a high proportion of saturated fatty acids (SFAs), instead of a low proportion of poly unsaturated fatty acids (PUFA). Oxidized low-density lipoprotein receptor 1 (OLR1) gene plays a key role in reducing oxidized low-density lipoprotein (oxLDL) involved in injury, dysfunction, and inactivation of endothelial cells. Association of the OLR1 gene in the 3’UTR of the g.8232(A/C) genotypes on 21 types of the milk fatty acids of Holstein Friesian (HF) cows were analysed kept at a breeding station in Central Java. Genotyping was analyzed by PCR-RFLP method using Pst1 restriction enzyme. Genotypic data were calculated for allele frequency, genotype frequency, and heterozygosity values. Effects of genotypes on individual fatty acid components were analyzed by General Linier Model. Genotyping resulted in three genotypes of AA, AC and CC with the frequenciest successively 0.275, 0.525, and 0.200; and two alleles for A (0.463) and C (0.538). Genotypes affected medium-chain SFAs for Myristic (C14:0) and long-chain for Palmitic (C16:0) and Stearic (C18:0). The AA genotype generated the lowest levels of myristic and stearic, instead of the highest content of palmitic. Further the AA genotype resulted in the highest level of Oleic (C18:1) of MUFA. Therefore the OLR1 gene of the 3’UTR g.8232 (A>C) SNP is possible considered as a molecular-based selection in reducing SFAs (myristic and stearic) and increasing MUFA (Oleic) in domestic HF cattle.
Coat cover characteristics of sheep in North Sumatera, Indonesia
Authors: Tiesnamurti B , Anwar  , Destomo A , Febresiana A 
Published: June 2021

Abstract
The study was conducted to investigate the coat cover characteristics of sheep kept by farmers in several districts in North Sumatera , as a sign of adaptability to the local environment. A total of 190 sheep (local and introduced) of both sexes and different age (10–14) were used for the study from 5 districts of Deli Serdang, Labuan Batu Utara, Asahan, Serdang Berdagai and Batubara in North Sumatera. The data were analysed using general linear model with the independent variables was location of the study, farmers involve in the study, breed of sheep, sex, age and the dependent variables were body weight and coat quality. The study showed that the average coat color of the sheep in the study was mostly white (95.7%). Most of the sheep have solid coat cover (61.1%) and small percentage with patches (30%) and spotted (8.9%). The average body weight of the sheep was 23.2 kg with significant effect (P<0.05) of districts, farmers, sex, age and wool density. The average of product between coat cover and coat density was 14.1 with significant effect (P<0.05) of districts, farmers and age of sheep. Therefore it can be concluded that sheep in this study mostly has white coat color, with area cover approximately of 4.2 and coarse quality of wool with average score of 3.1.