bluuebunny/crossref_metadata_2025_split huggingface dataset:
The effect of self efficacy on students’ motivation and learning outcome of class 8 in build flat side space material
Authors: Farihah U , Rakasiwi P 
Published: June 2020

Abstract
The purpose of this study was to determine the effect of self efficacy on student’s motivation and learning outcomes in the topic of build flat side space. This study was conducted at class 8 of SMP Negeri 12 Jember east Java, Indonesia in the 2019-2020 academic year. This research used a quantitative approach in the type of survey research. Simple random sampling was used as the sampling technique. Data collection technique used were questionnaires and tests. Simple linear regression test was used to analyse the data. The research finding showed that there is an influence of self efficacy on student learning motivation (sig 0.000) but there is no influence on student learning outcomes (sig 0.062). The influence of self efficacy on learning motivation is 49.7%, while 50.3% is influenced by other factors not discussed in this study
The implementation of lesson study as a tool to improve the students’ higher order thinking skill on trigonometric material regarding creative thinking skill
Authors: Hadianto N , Hobri  , Irvan M 
Published: June 2020

Abstract
The development of lesson study-based learning tool where students are able to involve directly in the learning so it is expected to improve their creative thinking skill. This research aimed at developing lesson study-based learning tool to help the students improve their creative thinking skill at SMK Darussalam in Trigonometry material validly, practically and effectively. This research used Plomp development model research design consisting of 3 phases covering: (i) Preliminary Research, (ii) Prototyping Phase and (iii) Assessment Phase. This research was the learning tool development research and experimental research by using Quasi Experimental Design method and Non-equivalent Post-test Only Control Group Design. In this research, the sampling technique used was simple random sampling. Out of 7 population classes, 2 sample classes were selected namely class X TKJ 1 as the experimental class which was given the treatment by using teaching material development and class X TKJ 2 as the control class by using direct learning. The data analysis technique used descriptive analysis to test the validity, practicality and effectivity as well as through mix method analysis to analyze the results of the students' learning achievement between the experimental and control classes. The results of this research revealed that: in the pre-test phase, from the experimental class, there were 3 students who belonged to L4 level, 1 student from the control class and in the post-test phase, from the experimental class, there were 8 students who were at L4 and only 1 student from the control class. With a significance of [t=1.15 and df = 61, p>0.05] in the pre-test phase and the value of [t=4.04 and df = 61, p<0.05] in the post-test phase and in the regression test, the values of tcount was 4.649 and ttable in degrees of freedom (df) = N − 2 = 33 − 2 = 31 with a significance of 95% as much as 1.196 with a determination of tcount > ttable (8.296 > 1.196) therefore Ho was accepted and Ha was rejected with a provision that there was a significant influence of lesson study method on the students' creative thinking skill.
Research on Application of Double Fuzzy Algorithm in Voltage Filtering of Aluminum Electrolysis Cell
Authors: Deng Lianwen , Jiang Haibin , Zhao Yan , Liu Guotao 
Published: June 2020

Abstract
At present, the electrolytic aluminum control system uses a first-order algorithm to filter the voltage of the electrolytic cell with serious hysteresis and weak tracking. Aiming at the above problems, this paper researches and designs an adaptive filter based on double fuzzy algorithm. The change of the electrolytic cell voltage measured, the absolute value of the difference between electrolytic cell measurement voltage and filtered electrolytic cell voltage are used as the two input variables of the fuzzy controller 1. The change of the electrolytic cell voltage measured,the absolute value of the difference between electrolytic cell measured voltage and corrected electrolytic cell voltage are used as the two input variables of the fuzzy controller 2. The two fuzzy controllers calculate the filter coefficient and the correction coefficient respectively through a fuzzy algorithm. Simulation results show that the tracking time of the double fuzzy algorithm is 78% shorter than that of the first-order algorithm, and the root mean square error is reduced by 70% compared to the first-order algorithm. It can provide a feasible and excellent filtering algorithm for the intelligent control of electrolytic aluminum.
Intrusion Detection through Contiguous System Call Traces
Authors: Chen Lin 
Published: June 2020

Abstract
The server backend operating system for the Servers and scientific computing necessities is a big market, and the majority market share of this market is hold by the Linux based Operating System for a very long time period. However, as running in backend lack of humanity monitoring, and the default signature-based security measures are ineffectual for detecting stealth attacks, the Linux OS needs an intelligent intrusion detection solution. This paper proposed an automatous method to inspect the contiguous system call traces and identify the abnormal system call pattern only by analyzing a trace of small window size, rather than probing the full traces.
Millimeter-wave Respiratory Rate Detection System with WiFi and Android Platform
Authors: Fang Yunjie , Bao Xingda , Ye Jingcheng 
Published: June 2020

Abstract
Sleep monitoring is widely used in health monitoring. Sleep respiratory rate is an important indicator of sleep quality. This paper designs a respiratory frequency monitoring system based on millimeter-wave radar, WiFi communication module and an Android-based mobile terminal APP. The respiratory data collected by the millimeter-wave radar is transmitted to the mobile phone through WiFi module. The phone can directly display the respiratory frequency data and the respiratory frequency in a curve manner. After testing, the system runs stably and reliably, has real-time performance and strong portability, and provides a new application method for millimeter-wave radar.
Stair Climbing Multifunctional Walking Robot
Authors: Zhang Sijia , Guo Lefan , Wang Zhenyi 
Published: June 2020

Abstract
China has the largest number of elderly people in the world, and many of them have the problem of mobility. At present, there are some problems in the market, such as single function, difficult operation and lack of safety protection. The walking aid robot can not only meet the demands of the old people, satisfy the basic requirement of walking or the transfer between sitting and standing, but can also help the old grab objects from the further place. It has the advantages of simple operation, abundant functions, low cost in maintenance, high degree in safety index and so on, which can completely meet the needs of modern society.
Design of bag filter for micro pulverizer
Authors: Liu Mingming , Wang Ning , Shan Ying , Zhao Peiyuan 
Published: June 2020

Abstract
In feed industry, a lot of dust will be produced in the process of raw material comminution, which will cause environmental pollution and be harmful to the health of workers and so on. In this paper, a kind of bag filter for micro pulverizer in feed industry is designed. The bag filter was firstly carried out, including the design of the overall scheme, the calculation of filtering wind speed, the filter bag parameters, the blowing component system, and the specific structure design of the dust collector according to the dust processing capacity and dust characteristics. The test proves that this bag filter has an average dust removal efficiency of more than 96%, which can effectively deal with the dust generated by the micro pulverizer, and provide an application reference for solving this type of dust pollution treatment.
Trajectory Planning of a Planar Cable-Driven Robot for Industrial Detection
Authors: Hong Yifan , Tan Jianping 
Published: June 2020

Abstract
This paper presents a planar two-degree-of-freedom cable-driven robot for detecting the surface defect of the boiler pipes. The mechanism is first described and inverse solution laws of position, velocity and acceleration are studied based on the dynamic model of the cable-driven robot. A linear trajectory planning approach is developed, which is based on the position discrete differential and trapezoidal speed planning. An example trajectory is presented, then simulating and analyzing the change law of the length and velocity of the driving cable based on the point-to-point linear trajectory planning algorithm. The research shows that the length of the cable is continuously changed, which ensures that the end-effector of cable-driven robot can run smoothly, continuously, and accurately during the industrial detection.
Troubleshooting and Fault Analysis of Cabin Odors of Civil Aircraft
Authors: Bao Guangyu , Yang Zhi , Wang Dawei , Huo Xiheng , Ma Xiangdong 
Published: June 2020

Abstract
The cause of cabin odors is usually hard to be identified when there is no specific crew alerts or indications, which could have a catastrophic effect on civil aircrafts. Fault analysis has been conducted based on FTA (Fault Tree Analysis) in this paper to locate fault sources of cabin odors. A checklist is recommended to be performed during the flight or ground tests afterwards, which could provide quantitative references. An actual case applying the troubleshooting and analysis method above is shared at the end.
Research on the thermal aging life prediction of XLPE cable
Authors: Lin Jingdong , Cai Li 
Published: June 2020

Abstract
Crosslinked polyethylene(XLPE) cable is one of the most important tools to transmit electric energy and electrical signals, but its insulation material is vulnerable to damage due to the complex working environment. If the aging cable is not replaced in time, it will easily cause fire and threaten the safety of life and property. Life prediction of cables is essential to ensure reliable operation. Hence, the objective of this study is to provide a theoretical basis for cable replacement. This paper, firstly, focuses on the thermal aging mechanism of cable. Based on Arrhenius Model, multivariate nonlinear regression method was used to process the data and the thermal aging life prediction model of cable had been derived. From the real operation perspective, the reliability of the model was analyzed. 50% of retention of elongation at break was measured as an indicator of the failure point, the life evaluations of cable was carried out. The result indicates that the service life of cable at 90 °C is 32.2 a.
Real-time FFSN Detection Method Based on Hurst Exponent
Authors: Wang Jiajia , Chen Yu 
Published: June 2020

Abstract
In this paper, a real-time detection method of FFSN is designed. The response delay time of domain name is extracted by passive method. According to the self-similarity of response delay time of legitimate domain name and the difference of response delay time between legitimate domain name and FFSN, VTP analysis method based on Hurst exponent is used to detect FFSN. In order to avoid false alarm caused by the network itself, the suspected network also needs to be used the active method to judge the fast flux attribute in order to confirm the existence of FFSN. Our method can not only detect the existence of FFSN in real time, but also give the specific FFSN domain name. The experimental results show the effectiveness of our method.
Analysis of China’s Smart City Upgrade and Smart Logistics Development under the COVID-19 Epidemic
Authors: Wang Xueliang , Le Xiaobing , Lu Qiuyun 
Published: June 2020

Abstract
Affected by the COVID-19 epidemic, smart city and logistics in China have been developed significantly. This study is based on the accelerated development of smart cities and smart logistics after the outbreak of COVID-19 in China, and combined with literature, it puts forward the update of smart cities and the trend of gradually centralized, intelligent and intensive development of China’s logistics industry.
CFD Simulation Analysis on Aerodynamic Parameters of Steel Tubular Transmission Tower Body
Authors: Yang Fengli , Zhang Hongjie , Shao Shuai , Huang Guo , Wang Fei 
Published: June 2020

Abstract
This paper utilizes the CFD simulation analysis method, calculates and analyzes the distribution characteristics of streaming around the typical steel tubular transmission tower body and the pressure field, researches the change law of wind load force (torque) coefficient along with each main shaft direction o tower body, and then compares it with corresponding wind tunnel test result, and verifies the adaptability of this CFD simulation result. The result shows that the pole member in the upwind direction on the steel tubular tower has obvious disturbance and shielding effect to wind speed distribution around the pole member of downwind direction. The wind direction has obvious influence on the aerodynamic (torque) parameters of tower body, especially the steel tubular - angle steel combined tower body. The above research result provides a certain theoretical support and value taking basis for the wind-resistant design of steel tubular transmission tower body.
Analysis of Hydrodynamic Performance of Ducted Paddle with Front Rectifying Guide Blade
Authors: Hao Zongrui , Ren Wanlong , Zhang Hao , Hua Zhili , Wang Yue 
Published: June 2020

Abstract
The SST k-ω model is used to simulate the open water performance of the ducted propeller, and the hydrodynamic performance is compared with the experimental results. The SST k-ω model is validated to effectively predict the hydrodynamic performance of ducted propellers. Based on the analysis of the optimization of the ducted propeller, guide blades are installed in front of the blades to improve the performance of the ducted propellers. The performance of the ducted propellers on the ducted propellers is analyzed, and the influence laws are studied to provide a theoretical basis for the subsequent improvement of the ducted propellers.
Performance analysis of single-channel pump with different wrap angles
Authors: Hao Zongrui , Ren Wanlong , Xu Juan , Zhang Hao , Wang Yue 
Published: June 2020

Abstract
When a single-channel pump is used to transport living things, the rotating action of the impeller will cause damages to the living things. To improve the survival rate of the single-channel pump for transporting living things and improve the performance, the effect of the impeller wrap angle on the performance of the single-channel pump was studied by numerical simulation. The external characteristic curve is analyzed and the change of the pressure field of the flow field in the flow channel with the wrap angle is grasped. The pressure pulsation at the monitoring points is analyzed, and the influence law of the wrap angle on the performance of the single-channel pump is obtained. This law lays the foundation for subsequent single-channel pump design
Research on control technology of RS422A differential time-unified signal
Authors: Lv Wenfa 
Published: June 2020

Abstract
RS422A differential signal is a kind of bipolar pulse signal formed by level conversion of TTL signal through RS422A differential transmission device.Using shielded twisted pair transmission, the signal level is determined by the voltage difference between the two twisted pairs at the same time. It has the characteristics of long transmission distance and strong anti-interference ability.The time system signal is a standard RS422 differential signal, which plays an important role in the fire control system. The complex programmable logic device CPLD, the high-precision temperature-compensated crystal oscillator, and the standard RS422A differential transceiver device are used as the control device in this article. The control methods for generating, detecting, sending and receiving, adjusting the pulse width and synchronizing the timing signals are elaborated in detail.This method has the characteristics of simple circuit, high reliability, flexible control, high control accuracy, etc. It is widely used in fire control systems.
Optimization of Large-scaled Random Access Congestion Control Oriented to Narrow Band Internet of Things
Authors: Wang Li , Wang Wei , Hu Xianhua , Xie Tairong 
Published: June 2020

Abstract
Narrow band internet of things (NB-IoT), as an important low-power wide-area coverage of 5G with independent intellectual property rights, has great potential in small data monitoring of urban power transmission and distribution. However, it is extremely easy to cause congestion and overloading of the system upon large-scaled terminal requests for random access, which will decrease network access performance and bring great challenges to promote NB-IoT in urban power Internet of Things. On this basis, a mathematical model of network load was constructed to estimate and predict load changes. Then, a dynamic adjustment functional model was set up according to dynamic adjustment of access parameter optimization based on loads. Based on above idea, a random access algorithm based on dynamic parameter adjustment in accordance to dynamic priority was developed. It increases the success rate of devices access to NB-IoT system, decreases access delay of devices, and relieves network congestion. According to simulation results, the proposed algorithm has higher access success rate, lower total delay. And it guarantees delay for important node users and more optimized network performances compared with traditional network access algorithms.
Design of high-precision micro-automatic control system based on Segmentation driven and closed-loop control
Authors: Chen Dapeng 
Published: June 2020

Abstract
The high-precision micro-infusion automatic control system is an automatic infusion system that replaces manual infusion which solves the risk that the traditional infusion volume and speed cannot be controlled. By analyzing the system composition and configuration, it is determined that the system actuator belongs to the field of multi-body mechanics. After analysis of the system mechanics model, it is ensured that the mechanical performance of the designed system’s actuator meets the requirements. At the same time, the motor control method of subdivision drive and closed-loop control used in the design is described in detail, and the dynamic characteristics of the system are simulated and analyzed. High-precision and reliability control ensure that the medicine can enter the patient’s body uniformly, accurately and safely, and meet the design requirements.
Algorithmic Models for MicroBlog Information Mining System
Authors: Leng Jing , Xu Wei 
Published: June 2020

Abstract
Based on the “MicroBlog Community Massive Information Mining and Monitoring System”, this paper introduced the algorithm and model construction of microblog information word processing and mining conversion core functions of microblog information subsystem, in order to obtain the information objects needed in each link of the process of microblog information mining, which provides a basis for the realization of monitoring and early warning in the MicroBlog monitoring platform.
Marine collagen-chitosan-fucoidan cryogels as cell-laden biocomposites envisaging tissue engineering
Authors: Carvalho Duarte Nuno , López-Cebral Rita , Sousa Rita O , Alves Ana L , Reys Lara L , Silva Simone S , Oliveira J Miguel , Reis Rui L , Silva Tiago H 
Published: June 2020

Abstract
The combination of marine origin biopolymers for tissue engineering (TE) applications is of high interest, due to their similarities with the proteins and polysaccharides present in the extracellular matrix of different human tissues. This manuscript reports on innovative collagen-chitosan-fucoidan cryogels formed by the simultaneous blending of these three marine polymers in a chemical-free crosslinking approach. The physicochemical characterization of marine biopolymers comprised FTIR, amino acid analysis, circular dichroism and SDS-PAGE, and suggested that the jellyfish collagen used in the cryogels was not denatured (preserved the triple helical structure) and had similarities with type II collagen. The chitosan presented a high deacetylation degree (90.1%) that can strongly influence the polymer physicochemical properties and biomaterial formation. By its turn, rheology, and SEM studies confirmed that these novel cryogels present interesting properties for TE purposes, such as effective blending of biopolymers without visible material segregation, mechanical stability (strong viscoelastic character), as well as adequate porosity to support cell proliferation and exchange of nutrients and waste products. Additionally, in vitro cellular assessments of all cryogel formulations revealed a non-cytotoxic behavior. The MTS test, live/dead assay and cell morphology assessment (phalloidin DAPI) showed that cryogels can provide a proper microenvironment for cell culturing, supporting cell viability and promoting cell proliferation. Overall, the obtained results suggest that the novel collagen-chitosan-fucoidan cryogels herein presented are promising scaffolds envisaging tissue engineering purposes, as both acellular biomaterials or cell-laden cryogels.
Tolerance level of several hybrid maize genotypes to waterlogging stress
Authors: Muliadi Ahmad , Effendi Roy , Azrai dan Muhammad 
Published: June 2020

Abstract
Waterlogging is one of the most important constraints for maize production and productivity in many parts of the world, caused by flooding, continuous rainfall coupled with inadequate drainage or a high water table. The objective of this study was to determine the tolerance level of several hybrid maize genotypes to waterlogging stress. Screening of 27 hybrid maize genotypes was carried out in waterlogged condition and not waterlogged condition (as control) in a green house using a plastic cup of 300 ml volume in a randomized block design, 3 replications. Each genotype was planted in 5 seeds, grown by watering to V1-V2 phase which is characterized by the appearance of 1-2 complete leaves. Screening on waterlogged conditions performed on plastic-coated wooden tub. The water level during flooding is kept the same for 5 days. The results showed that the estimation of tolerance of hybrid maize genotypes to waterlogging using a flooding sensitivity index (FSI) which was calculated based on certain variables showed different FSI values for each variable. Determination of variables that have a large influence on the diversity of tolerance of maize genotypes to waterlogging can be known from the results of Principal Component Analysis. The results of the analysis show that the first principle component, the variable which has a big influence on the diversity of maize genotype tolerance to waterlogging stress is the number of roots with a proportion of diversity of 37.3%. The second principle component shows that the root length variable has a big influence with a proportion of variance of 22.52%. The cumulative proportion of the first and second major components is quite large at 59.83%. Based on the FSI root length variable, there are 3 hybrid maize genotypes that are tolerant of standing water while in the root number variable there are 13 tolerant genotypes with average fresh weight of shoot character, root number and stomata density higher than that in normal conditions.