bluuebunny/crossref_metadata_2025 huggingface dataset:
Research on behaviour planning for power substation inspection robot based on fuzzy cognitive map
Authors: Yuan Liu Yuan , Zhang Wei , Zhang Zi Lin , Lin Ge Lin
Published: December 2022

A fuzzy cognitive map based behavior planning method for mobile robot is proposed in this paper. Aiming at the intelligentialize advanced application problems of power substation equipment inspection robot, a logical structure of inspection tasks planning based on hierarchical hybrid complex system is presented, and the operating principle of task decomposition and task planning are given in detail. The dependent events in inspecting tasks are considered as concept nodes to present the connection weights between nodes and establish the fuzzy cognitive map model of task and behavior planning, so as to realize task decomposition and generate the action logic sequences. Meanwhile, the action sequences can be adjusted in real time with the sensor information. The proposed method is simple without introducing complicated calculations and much training. Simulation results verify the feasibility and effectiveness.
Phase stability and mechanical properties of an ultra-fine grain FeCoNiCu0.4Al0.4 high entropy alloy
Authors: Peng Haiyan , Kang Zhixin , Chen Wenguang , Long Yan , Liang Xiaobiao , Gao Jixiang
Published: December 2022

FeCoNiCu0.4Al0.4 high entropy alloy (HEA) were produced via mechanically alloyed (MA) and spark plasma sintering (SPS) at 950~1100 °C. Microstructure and mechanical properties of bulk HEA are studied. In the sintering process at temperatures ≤1050 °C, disordered FCC phase precipitates BCC phase. When sintering temperature increases to 1100 °C, only single FCC phase could be clearly detected. The stability of FCC phase is obviously influenced by the sintering temperature, therefore strength-ductility balance could be tailored by controlling BCC/FCC ratio via changing sintering temperature. The FeCoNiCu0.4Al0.4 alloy sintered at 1050 °C obtains a combination of excellent strength (yield strength=1562.4 MPa) and good plasticity (plastic strain to failure=30.3 %) at room temperature. The reason for the excellent strength of this HEA is mainly because the grain boundary strengthening in FCC matrix.
ARIEL experiments and theory
Authors: Navrátil Petr
Published: December 2022

I present an overview of experiments at TRIUMF ARIEL and ISAC facilities covering both the current and the future envisioned programs. I also briefly review theory program at TRIUMF that relates to the ARIEL experimental program. I highlight several recent experimental results from the nuclear astrophysics, nuclear structure, fundamental symmetries, and the sterile neutrino search. Finally, I mention ongoing theoretical ab initio calculations of the proton capture on 7Li related to the X17 boson observation.
ARIEL Accelerator Overview
Authors: Planche Thomas , Pachal Katherine , Milner Richard
Published: December 2022

This paper gives an overview of the ARIEL electron accelerator including the existing facility and possible future upgrade possibilities.
The MESA science program: dark matter and more
Authors: Doria Luca
Published: December 2022

The Mainz Energy-recovery Superconducting Accelerator MESA will allow precise measurements in hadron and nuclear physics, as well as exciting opportunities in dark matter searches. Three experiments will be built around this new and unique facility: MAGIX, P2, and DarkMESA. In this contribution, the MESA science program will be presented, with focus on dark matter and new physics searches.
Operation of an Energy Recovery Linac with an Internal Target
Authors: Benson S V , Douglas D R
Published: December 2022

Because an Energy Recovery Linac (ERL) decelerates and dumps the beam after at most a few passes, beam degradation in the interaction region that is orders of magnitude larger than in a storage ring is tolerable in such a device. As a consequence, some new types of Nuclear Physics experiments can be carried out. In 2016, an experiment (the DarkLight experiment) was installed in the Jefferson Lab FEL Driver ERL to test out this idea. The ERL had previously been used for FEL applications where high peak current and a large growth in energy spread was present. For the internal target, the machine setup required very small energy spread, and had to deal with large transverse emittance growth in the target. Additionally, the addition of a strong solenoid in the transport complicated the details of energy recovery. This presentation will describe how these new machine physics challenges were addressed.
Status of the X17 search in Montreal
Authors: Azuelos G. , Bryman D. , Chen W.C. , de Luz H. , Doria L. , Gupta A. , Hamel L-A. , Laurin M. , Leach K. , Lefebvre G. , Martin J-P. , Robinson A. , Starinski N. , Sykora R. , Tiwari D. , Wichoski U. , Zacek V.
Published: December 2022

At the Montreal Tandem accelerator, an experiment is being set up to measure internal pair creation from the decay of nuclear excited states using a multiwire proportional chamber and scintillator bars surrounding it from the Daphne experiment. The acceptance covers a solid angle of nearly 4π. Preamplifiers and the data acquisition hardware have been designed and tested. The 7LiF target, mounted on an Al foil and water-cooled is in a thin carbon fiber section of the beamline. The experiment will focus at first on a measurement of the internal pair creation from the 18.15 MeV state of 8Be with the aim of observing independently the X17 particle discovered by the ATOMKI experiment. Assuming the ATOMKI evaluation of the electron-pair production rate from X17, Geant4 simulation predicts observation of a clear signal after about 2 weeks of data taking with 2 μA proton beam. The IPC measurement could eventually be extended to the giant dipole resonance of 8Be, as well as to other nuclei, in particular to 10B.
Search for Light Neutral Bosons in The TREK/E36 Experiment at J-PARC
Authors: Dongwi Dongwi H.
Published: December 2022

The Standard Model (SM) represents our best description of the subatomic world and has been very successful in explaining how elementary particles interact under the influence of the fundamental forces. Despite its far reaching success in describing the building blocks of matter, the SM is still incomplete; falling short to explain dark matter, baryogenesis, neutrino masses and much more. The E36 experiment conducted at J-PARC in Japan, allows for sensitivity to search for light U(1) gauge bosons, in the muonic K
+ decay channel. Such U(1) bosons could be associated with dark matter or explain established muon-related anomalies such as the muon g − 2 value, and perhaps the proton radius puzzle. A realistic simulation study was employed for these rare searches in a mass range of 20 MeV to 100 MeV. Preliminary results of the upper limits for the A’ branching ratio Br(A’) extracted at 95% CL, will be presented.
Sub-GeV dark matter at accelerators
Authors: Ritz Adam
Published: December 2022

Motivations for studying light MeV-to-GeV mass dark matter scenarios and opportunities for probing these models with high intensity fixed target experiments are reviewed. Attention is focussed on the lower O(MeV) end of the thermal relic mass window, as relevant for high-intensity accelerators probing nuclear structure, and the complexities of models in this mass range due to cosmological constraints such as the bound on N
eff. Existing limits, including those from direct detection electron-scattering experiments sensitive to a sub-leading but more energetic solar reflected component of the dark matter halo distribution, are also reviewed.
Probing Lepton Flavor Universality with Pion Decays
Authors: Bryman Douglas
Published: December 2022

Searches for violation of lepton flavor universality are topical due to hints of discrepancies with Standard Model expectations in studies involving muons, B mesons, and beta decays which may be related by tests of the unitarity of the Cabibbo-Kobayashi-Maskawa quark mixing matrix. The status and prospects of pion decay experiments which offer the most precise tests of e − μ universality are discussed.
Closing Remarks
Authors: Milner Richard G.
Published: December 2022

This paper summarizes the workshop and presents a perspective on the path forward.
Identification of Groundwater Using Geoelectrical Method VES (Vertical Electrical Sounding) in Karimunjawa City, Central Java
Authors: Bahari M I A T , Supriyadi S , Pryambodo D G , Prihantono J
Published: December 2022

Efforts to reduce the clean water crisis do research in Karimunjawa. Research in Karimunjawa at UTM coordinates 437524.656 m Easting and 9351066.022 m Northing aim to describe the location groundwater, distribution of brackish water and freshwater conditions so that could make as a consideration in making well drill or the usual later could reduce clean water crisis. Research in Karimunjawa uses the geoelectric resistivity method of the Schlumberger configuration. Schlumberger configuration was used to get focused data by vertical to know groundwater's presence and the layer's amount. The results were obtained in this study using the Schlumberger configuration. The first track, the groundwater aquifer, was found at KJ-08 to KJ-15, with a depth from the surface of 66.7 m with a distance of less than 1050 m. The second track of the groundwater aquifer was only found at a depth not enough from 10 m with a distance of less than 903 m. The third track of the groundwater aquifer was only found at less depth than 10 m with a distance of less than 563 m. In the fourth track, the groundwater aquifer was found at KJ-09 to KJ-12 with a depth from the surface to a depth of 66.7 m with a distance of less than 494 m.
Fabrication of PVA/SiO2 (Nanofiber) Membranes Prepared Using Electrospinning Method for Lithium Battery Separator
Authors: Sania N F , Munasir M
Published: December 2022

Separators play an important role in ensuring the safety of Lithium-Ion Batteries (LIB). This study uses PVA and SiO2 as membrane separators with the aim of increasing membrane porosity, absorption of liquid electrolyte, ionic conductivity and reducing interface resistance, then using the electrospinning method with variations in the composition of PVA/SiO2 (0.5%), PVA/SiO2(1%), PVA/SiO2(1.5%) and PVA/SiO2(2%). The FTIR analysis results contained-OH groups in the PVA material, while bond formation between PVA-SiO2 was indicated by the presence of Si-O-C peaks. The analysis results of the SEM showed that the mean nanofiber diameters for the PVA and PVA-SiO2 membranes (1%, 2%) were 259±18 nm, 227±16 nm, and 200±11 nm. The results of the calculation of porosity and electrolyte absorption: the higher the SiO2 concentration, the higher the porosity and electrolyte absorption value on the membrane. Therefore, the results of the membrane wettability analysis contain PVA and PVA-SiO2 to almost 0° electrolyte. We can say that the membrane is hydrophilic. Electrical Conductivity and Impedance (EIS) are interconnected, and according to theory, the higher the SiO2 concentration, the higher the electrical conductivity value and the lower the interfacial resistance. Based on the above criteria, this material can be classified as a good separator material for Li-ion batteries.
Analysis Multi Representation Ability and Learning Outcomes of Optical Materials
Authors: Sunarti T , Amiruddin M Z B
Published: December 2022

The purpose of this study was to describe students' ability of multi-representation in solving physics problems on optical material and students' learning outcomes in Physics Department, Universitas Negeri Surabaya. This study is quantitative descriptive research. The sample of this research is one class of students in the physics education study program and one class of students in the physics study program who took program courses in the odd semester of 2021/2022. The research data are multi-representation abilities and learning outcomes of optical materials. The test instrument used is based on multi-representation, which has been validated theoretically and is declared valid. The results of the analysis show that students' multi-representation abilities that are quite good are verbal and visual representation abilities, each with a percentage, while the ability to very good representation is a mathematical representation and symbolic. There is no very significant difference between the multi-representation abilities of students in physics education study programs and students of physics study programs. It is hoped that in the future, the results of the study can become information and references for teachers and lecturers in carrying out physics learning on optical material.
Enhancement of microstructure characteristic and dielectric constant of BaMn0.05Ti0.95O3 ceramics
Authors: Suherman B , Nurosyid F , Handoko E , Khairuddin  , Sandi D K , Hasanah L U , Agustina F R , Puspita N F S , Iriani Y
Published: December 2022

Barium Titanate or BaTiO3, a ferroelectric material with good dielectric properties, is widely studied. The performance of BT is influenced by synthesis and doping. Here, Barium Titanate has been doped with Manganese via the co-precipitation procedure sintered at 900°C and 1000°C. The purposes of this study were to examine the microstructure and dielectric constant of BaMn0.05Ti0.95O3 with variation sintering temperatures at 900°C and 1000°C. The testing employed X-Ray Diffraction (XRD), Fourier Transform Infrared (FTIR), and Resistance Capacitance Inductance (LCR Meter). The XRD data exposed that the crystal size of the BaMn0.05Ti0.9503 sample enlarged from 48.27 nm to 72.41 nm with increasing sintering temperature. The analysis results using FTIR exhibited the existence of Ba-O and Ti-O bonds which confirmed the perovskite structure of BaTiO3. FTIR data also indicated the presence of C-H atomic bonds, which is the peak of impurities in the carbonate phase. The C-H bond vibration decreased at the higher sintering temperature. The dielectric constant value was obtained from the measurements using an LCR meter. In conclusion, increasing the sintering temperature improved the dielectric constant of BaMn0.05Ti0.95O3 from 119 to 386.
Characteristics of Optical Emission Spectroscopy Spectrum on Graphite Deposition Process with Sputtering Method
Authors: Kusumawati D H , Nurhuda M , Santjojo D J D H , Masruroh
Published: December 2022

The deposition process using the sputtering method is a deposition technique that produces a thin layer. The sputtering method can be used with some modifications made to the deposition system. One of the identifications of the sputtering process can be made through the results of the Optical Emission Spectroscopy (OES) spectrum. By analyzing the OES spectrum in the sputtering system, it can be seen the condition of plasma formation in the chamber. The gas used in the deposition system is Argon. By varying the voltage, flow rate, pressure and temperature of the substrate, it is found that argon gas is ionized at a voltage of 140 V, with a flow rate of 60 ml/min, a pressure of 15 Pa and a substrate temperature of 200°C. SEM-EDX characterization of the deposition results showed that graphite growing on the substrate had been identified at around 6.5%.
Digital Learning Integrated with Local Wisdom to Improve Students’ Physics Problem-Solving Skills and Digital Literacy
Authors: Siswanto J , Harjanta A T J , Suminar I , Suyidno S
Published: December 2022

Digital learning integrated with local wisdom is designed to improve students' physics problem-solving skills and digital literacy. The study aims to analyze the practicality and effectiveness of digital learning integrated with local wisdom designed to improve students' physics problem-solving skills and digital literacy. The research was conducted by applying a pre-experimental design, one group pre-test and post-test for 66 high school students. When the learning process is carried out, observe the practicality of learning. The data collected from the pre-test and post-test were analyzed using paired t-test and n-gain. The results show that digital learning integrated with local wisdom is designed to improve students' physics problem-solving skills and digital literacy. It is proven that: it is practical (applicable) which is indicated by each phase that can be implemented by teachers with good categories; and effective in increasing students' physics problem solving and digital literacy, as indicated by a significant increase in physics problem-solving skills and digital literacy at 5%, and the average n-gain is in the medium category.
The Liquifaction Modeling to Analysis of Soil Structure Composition
Authors: Astutik S , Aprilina A N
Published: December 2022

Indonesia is a country that is prone to natural disasters, one of which is liquefaction. The earthquake that occurred in Palu City in 2018 was a tsunami, and the ground moved or also known as liquefaction. The purpose of this study is to analyze the results of modelling the liquefaction potential using a shaking table test tool based on the composition of the soil structure and based on the groundwater level. The type of research used is descriptive qualitative research with modelling using a table test tool. The soil samples used were beach sand and clay soil with dry soil conditions and diameter based on the results of sieve no. 20 with a hole diameter of 0.85 mm. The water volume used is 4 L, 4.5 L, and 5 L. The result of this research is sand soil which is water-saturated soil liquefaction occurs and based on the groundwater level shows sand soil whit a volume of 5L, which is assumed to be a shallow groundwater level experiencing greater and faster liquefaction. One of the factors that occur in a liquefaction area is a water-saturated which has a shallow groundwater level.
Autonomy-Based Creative Learning: Equip Creativity and Concern for Prospective Physics Teachers in Wetland Environments
Authors: Suyidno S , Haryandi S , Mahtari S , Azhari A , Sunarti T
Published: December 2022

Creativity and environmental care in wetlands have received wide attention from the government and researchers in various countries, especially in the industrial era of 4.0. However, both competencies are less familiar in physics learning. Therefore, this study aims to analyze the effectiveness of Autonomy-Based Creative Learning (ABCL) in improving prospective physics teachers' creativity and caring attitude in wetland environments. This research includes development research using the ADDIE model. The implementation test was conducted on 59 physics education students in South Kalimantan (Indonesia), which were divided into three groups. Before and after learning, prospective physics teachers take a creativity test in designing ABCL, then fill out environmental care questionnaires to determine their attitude on preserving the environment’s energy-saving behaviour, managing waste, loving the environment program, and health protocols. The results show increased students' creativity and caring attitude in the wetland environment. N-gain creativity in the medium criteria, while n-gain care for the environment in the standard serial. This creativity is because students initially have a good understanding of environmental care. Thus, this learning is effectively used to equip the creativity and concern of prospective physics teachers in the wetland environment.
Modification of Purun Tikus (Eleocharis dulcis) Long Fiber with Potential as Composite Reinforcement Material
Authors: Haryanti N H , Suryajaya  , Suarso E , Khaipanurani  , Manik T N
Published: December 2022

The choice of natural fiber purun tikus (Eleocharis dulcis) as a composite reinforcement material is related to its benefits, such as low price, abundant quantity, renewable, and environmentally friendly. In this research, the effect of alkalizing treatment and hot water immersion on the properties of purun tikus fiber were investigated. The long fiber of purun tikus measuring 20 cm and diameter < 0.064 cm was modified with 120°C hot water immersion and 5% NaOH immersion for 1 hour each. These treatments were applied to improve the properties of purun tikus fiber, such as their properties of chemical (moisture, lignin, cellulose, and hemicellulose), physical (density), and mechanical (tensile strength). The results showed a decrease in the water content, lignin, cellulose, and hemicellulose of purun tikus fiber, while the density and tensile strength increased after the treatment of 120°C hot water immersion and NaOH 5% alkalization. The NaOH 5% alkaline treatment was better than 120°C hot water immersion in terms of reducing water content, lignin, cellulose, and hemicellulose. Although the tensile strength of the modified NaOH 5% NaOH purun tikus fibers is lower than the 120°C hot water immersion treatment, it was still higher than before the modification. It is shown that these fibers blend well in the manufacture of composite materials and improve their mechanical properties.
The Profile of Misconceptions Using Three Tier Diagnostic Test on Dynamic Fluid
Authors: Aliyah R , Sudibyo E , Suyatno  , Wasis
Published: December 2022

Dynamic fluids have a stationary flow, where the volume of fluid flowing in each cross-section of the pipe in a specific time interval is the same even though the pipe is widening or narrowing but the fluid velocity is different. When a fluid moves through a section where the velocity and height above the surface change, the pressure in the fluid changes. Understanding led to errors in understanding the concept, so this research was carried out to identify the profile of misconceptions in a dynamic fluid material. Students misconceptions were detected using a three-tier diagnostic test with data analysis using the Certainty of Response Index (CRI). This research is quantitative descriptive research. The respondents of this study were students of class X of senior high school who had received dynamic fluid material. Based on the results of this research, showed that students experienced moderate category misconceptions on dynamic fluid material with the highest level of misconceptions, namely the concept of continuity equation analysis, and the lowest misconception in the analysis of the concept of water flow discharge.
A Comparative Study of The Crystallinity Value of Polyethylene Glycol-Based Composites Using XRD and WAXS
Authors: Fauziyah N A , Perwitasari D S , Fadly T A , Soontaranon S , Pratapa S
Published: December 2022

Crystallinity is an important parameter of thermoplastic polymers. Furthermore, crystallinity is closely related to processing conditions such as temperature and applied shear stress. However, determining the degree of crystallinity is very complicated because of the different interpretations of crystallinity according to each technique. In this paper, we analyze the crystallinity of polyethylene glycol-based composites using two instruments, i.e., X-Ray Diffraction (XRD) and wide-angle X-Ray Scattering (WAXS). The results showed that with the addition of 60 wt.% silica, the degree of crystallinity revealed by XRD was 81.24%, while WAXS showed a degree of crystallinity of 80.93%. In general, the crystallinity results obtained with WAXS were almost identical, only 0.31% different from the XRD results. This difference in results was due to more presence as a consequence of the broad amorphous halo and background instrumentation exhibited by the higher background from XRD. Thus, the instrument effect must first be removed from the XRD data and it is possible that the amorphous region of the sample will also be reduced and result in a slightly higher crystallinity. At the same time WAXS with the transmission technique will minimize the possibility of background instrumentation. Therefore, WAXS was recommended to analyze the crystallinity of polymer-based and amorphous materials.
Microstructure, Chemical Bonds, and Photocatalyst Activity of Neodymium-doped Strontium Titanate (Sr0.97Nd0.03TiO3) with 900°C and 1000°C Sintering Temperature
Authors: Hasanah L U , Agustina F R , Puspita N F S , Suherman B , Nurosyid F , Sandi D K , Iriani Y
Published: December 2022

Strontium Titanate is a perovskite oxide with remarkable properties as a photocatalyst. The synthesis of Strontium Titanate material with Neodymium doping (Sr0.97Nd0.03TiO3) has been completed by means of the co-precipitation procedure. Samples were sintered at temperatures of 900°C and 1000°C for 4 hours to investigate their properties. X-Ray Diffraction (XRD), Fourier-Transform Infrared spectroscopy (FTIR), and UV-Vis Spectrophotometer were employed to observe the microstructure, chemical bonds, and photocatalyst activity of Sr0.97Nd0.03TiO3. XRD data exhibited that the crystal size enlarged from 42.3 nm and 64.4 nm as the sintering temperature increased. FTIR data revealed strong Sr-Ti-O bonds and decreased C-H and C=H bond impurities as the sintering temperature increased. The photocatalytic performance was evaluated with methylene blue (MB) dye degradation by UV light irradiation for 3, 4, and 5 hours where the UV-Vis spectrophotometer tested the absorbance of the degraded MB. The results exhibited that Sr0.97Nd0.03TiO3 achieved the optimal degradation (62.7%) at 900°C and with 3 hours of irradiation.
Optimization of TPACK-based Project Learning in Micro-teaching Courses in Physics Education Study Programs during the Pandemic
Authors: Ekawati E Y , Prastyo A
Published: December 2022

The COVID-19 pandemic requires educators to design meaningful learning strategies that utilize technology, one of which is by implementing a project-based learning model. Advances in 21st-century technology encourage the creation of the TPACK learning approach. Prospective physics teachers need to have TPACK abilities as a provision to become competent physics teachers. This study aims to describe the results of implementing project-based learning models in improving TPACK abilities in physics education study program students in the pandemic era. This research method is Participatory Action Research (PAR). The data collection techniques for this study were observation, interviews, and questionnaires. The results showed that this learning project resulted in a product in the form of a learning implementation plan document and a learning implementation video. The results of implementing the project-based learning model from this research are: 1) students' TPACK abilities are at the exploring level. Students can integrate physics learning with suitable technology. However, students lack the confidence to conclude the evaluation results because learning is not applied in real classes; 2) students can use learning technology well; 3) students can master the learning content well; 4) students are not good at showing pedagogic abilities. Determination of learning strategies can affect students' TPACK abilities. Project-based learning strategies need to provide more stimulus so that TPACK's abilities can be improved, especially in their pedagogical abilities.
Tunable Magnetic State in AA-Stacked Bilayer Zigzag Graphene Nanoribbon by Increasing Thickness
Authors: Prayitno T B , Fahdiran R , Budi E
Published: December 2022

The density functional theory was utilized to investigate the likelihood of a tunable magnetic state in the AA-stacked bilayer zigzag graphene nanoribbon. The non-magnetic ground states at certain thicknesses were found, but then the magnetic ground states at the other thicknesses were observed. This happens by increasing the thickness so that the van der Waals force becomes weak. This creates spin polarization as the bonding between layers can be overcome. The phase transitions of magnetic ground states were also observed at a large thickness as applying the doping. This signified that the new magnetic ground state is still tunable by applying dope.
Prediction of Fluid Accumulation in Engine Disk Cavity Based on Encoder-Decoder
Authors: Li Hongyu , Su Yue , Wang Yankai
Published: December 2022

A neural network model based on the encoder and decoder is proposed for aero-engine fluid accumulation. The model uses the attention mechanism to adjust the output weight of the encoder and then uses the decoder to predict the fluid volume. The vibration eigenvalues were obtained by fast Fourier transform of the original vibration signals, and the eigenvalues of vibration data were used as the input model to predict the volume of fluid in the disk cavity. To evaluate the effectiveness of the model, an aero-engine disk cavity fluid simulation experiment was built, and the data obtained from the experiment were used to test the method and the model. The prediction accuracy of the proposed model for the volume of engine disk cavity fluid was over 95%, which has an important engineering value for the reliable operation of an aero-engine.
Study on Structural Stability of Black Phosphorus/Bismuth Oxysulfide/Tungsten Trioxide Heterojunction Based on XRD Measurement
Authors: He Xinyi , Xiong Yi , Zhao Meng , Zeng Wei
Published: December 2022

X-ray diffraction is employed to characterize the black phosphorus/bismuth oxysulfide/tungsten trioxide heterojunction composites to explore the alterations in crystallite size and micro-strain. The sample is immersed in sodium sulfite and tested each week. The Scherrer formula and Williamson-Hall plots are used to explore the effect of black phosphorus on improving the stability of the bismuth oxysulfide/tungsten trioxide heterojunction. The results show that the structure of black phosphorus/bismuth oxysulfide/tungsten trioxide heterojunction has changed as follows. The value of crystallite size of tungsten trioxide decreases from 13.82 nm to 9.23 nm, then to 7.45 nm per week, while the value of compressive micro-strain of WO3increases from -2.02×10−3to -7.58×10−3, then to -8.93×10−3. It illustrates that the lattice constant of WO3is compressed due to the lattice mismatch.
Design of Isolated Voltage Sampling Circuit Based on HCNR201
Authors: Yang Wanyu
Published: December 2022

With the continuous development of new energy technology, the photovoltaic system plays an extremely important role in people’s production and life, and new energy. As an indispensable part of a photovoltaic system, the battery voltage monitoring circuit plays a very important role. The voltage of the photovoltaic battery pack is usually relatively high. To ensure the safety of users and ensure that the controller is not affected by other adverse factors, this paper designs a voltage sampling circuit based on a high-precision linear optocoupler HCNR201. The detection circuit has strong electrical isolation characteristics and can monitor the voltage of two or more battery groups. In this paper, two groups of battery voltage monitoring using simulation and hardware test results proved that the voltage detection method has good linearity, and high accuracy, while the input and output of electrical isolation ensure user safety.
A Comparative Study between Negative & Positive Bias Temperature Instability of Commercial nano-MOSFETs Using Voltage Step Stress Technique
Authors: Li Zhigang , Wei Qinru , Gao Rui , Lin Xiaoling , Huang Yun
Published: December 2022

Bias temperature instability (BTI) has been one of the most common and also severe aging mechanisms in MOSFETs. In this work, a comparative study between NBTI and PBTI of commercial nano-MOSFETs has been conducted using the voltage step stress (VSS) technique, which is implemented by applying multiple constant voltage stress (CVS) continuously on a single device. Aging parameters are extracted for both NBTI and PBTI from a single device using the VSS technique, and the lifetime under room temperature is predicted. This work is of potential use for BTI investigation of commercial nano-MOSFETs in terms of both test efficiency and affordability.
High power non-electrolytic capacitor LED driver with three ports based on energy distribution
Authors: Li Zejun , Zhang Junzhao , Xu Bingshe , Han Xiaoqing , Li Fan , Lu Xiaofeng
Published: December 2022

To eliminate the influence of electrolytic capacitors on the driving life of high-power LED, a three-port high-power LED without electrolytic capacitor driving power supply based on energy distribution is proposed. The energy difference between the input terminal and the output terminal is balanced by the auxiliary DC-DC circuit to reduce the ripple of the output current. The working principle of the topology and switching mode is analyzed in detail. According to the proposed circuit topology, the mechanism of the output current ripple of the low-frequency circuit is analyzed, and a low-frequency ripple control strategy suitable for the circuit topology is proposed. The specific implementation scheme and the key parameters of the circuit design are given, and the model is verified, which proves that the proposed model is feasible.
Analysis of 330 kV B busbar tripping accident in a 330 kV substation
Authors: Jiang Fei , Zhang Zhaoyu , Zhang Suhui , Gao Jian
Published: December 2022

In this paper, the damage to the bus conductor and expansion joint caused by the tripping accident of bus B of a 330 kV line in Northwest China was taken as an example, and the reasons for the tripping accident were analyzed and improvement measures were proposed utilizing macro inspection and cross-cut test. The results showed that the main reason for this failure is that the manufacturer did not strictly implement the coating process, resulting in insufficient coating adhesion, and the coating gradually cracked and fell off during operation. The peeling coating caused air gap breakdown and ground flashover.
Study on Single Event Transient Pulse Characteristics of 16nm SOI FinFET Devices
Authors: Yang Shao-Hua , Lin Qian , Zhang Zhan-Gang , Peng Chao , Wu Fu-Gen
Published: December 2022

In this paper, the single event transient (SET) characteristics of the advanced 16 nm SOI FinFET device are investigated. The impacts of five different variables on the SET response of the 16 nm SOI FinFET device are investigated, including the incident position, particle LET value, particle characteristic radius, incident angle, and drain bias. It is found that 1) unlike traditional planar devices, the SET shape of the 16 nm SOI FinFET device changes significantly. The “SET tail” caused by charge diffusion disappears, the SET time width is at the magnitude of tens of ps, and the total collected charge is at the magnitude of fC. 2) The most sensitive region of SET is the center of the gate. Under the condition that the incident position is the center of the gate, the amount of collected charge is 1.33 times that of the center of the drain. 3) Under the premise of the same LET value, the larger the radius of the particle, the smaller the SET amplitude generated, due to the entire electron-hole pairs participating in the SET response with a smaller radius. 4) The larger the incident angle of the particle, the smaller the SET amplitude generated by the FinFET device. When the incident angle is 45°, the amount of charge collected at the drain is only 0.23 times that of the normal incidence. 5) Changing the drain bias of the device results in a nearly constant SET curve, which is one of the features that distinguishes the FDSOI device from other devices.
Study on the Kinematics of Key Components of Film Bidirectional Synchronous Stretching Equipment
Authors: Pan Mingyu , Wang Zheng
Published: December 2022

In this paper, the stretching chain clamp model in the film synchronous biaxial stretching equipment is simplified. And we establish the kinematic model. The variation rule of kinematic parameters of each joint of the chain clamp during the film stretching process is obtained. We use ADAMS software to inverse the trajectory of the stretching chain clamp to get the theoretical track and optimize the stretching rate of the stretching chain clamp. We compare the theoretical track with the initial stretching track model, optimize of stretching system structure, and achieve reliability and stability requirements for stretching chain clamp movement. This is important for the design of the stretching system and the improvement of film stretching quality.
Three State Output Module and Digital Switch Circuit Based on Threshold Memristor
Authors: Li Shuo , Pan Nan , Gao Sen , Li Lei
Published: December 2022

A memristor is a new electronic device with small volumes and small fluctuations. As a two-terminal device, it is mainly characterized by non-volatility and nanoscale characteristic size. Memristors can also calculate and store at the same time, which has a broad application prospect in logic circuits. Traditional integrated circuit technology has been very mature. And CMOS technology has almost reached the limit of physical size. Compared with traditional circuit components, memristor devices are compatible with CMOS circuits with their fast computing speed, low power consumption, and small layout area. A three-state output module based on a threshold memristor is proposed. The structure includes an inverter, a PMOS tube, two NMOS tubes, and two threshold memristors. Compared with the traditional three-state gate which only uses CMOS technology, the circuit area required by the module is smaller and the overall power consumption is lower, which caters to the development trend of portable and low-power electronic devices. Then the digital switch circuit using this module is introduced, which provides a new idea for the data transmission circuit. The circuit and module are simulated and verified by LTspice software.
Analysis of Influence of Permanent Magnet Demagnetization on Motor Temperature Rise
Authors: Zhao Pan , Yu YinQuan
Published: December 2022

Permanent magnet (PM) motors have high power density and difficult heat dissipation, especially when the PMs have demagnetization faults, which will increase the temperature rise of the motors. In this paper, the magneto-thermal coupling simulation analysis of the PM motor is carried out by the finite volume method, and the influence of different demagnetization degrees of PM demagnetization on the temperature rise of the motor is studied. The simulation results show that as the degree of demagnetization increases, the temperature rise of the motor increases significantly. If the temperature of the PM reaches the maximum working temperature, the demagnetization of the PM will continue all the time.
Enhancing the Photovoltaic Performance of Perovskite Solar Cells by Doping 2-mercaptoimidazole in the Active Layer
Authors: Chen Shuming , Wang Jintao , Li Ye , Zhang Jian , Duan Yu
Published: December 2022

Organic perovskite solar cells (PSCs) is concerned due to their photoelectric performance, low price, and solution treatable. However, there are defects in perovskite crystals that affect the power conversion efficiency (PCE) improvement. These effects include carrier transport, the morphology of the film surface, etc. Passivation is a reliable solution to reduce defects in crystals. We doped 2-mercaptoimidazole (2-MI) in the perovskite active layer to obtain efficient perovskite solar cells, the PCE of organic PSCs with 2-MI reaches 18.26%, which is effectively improved compared to the original device (17.58%). This work provides a new strategy for efficient PSCs.
Research on the Temperature Performance of a Lithium-Iron-Phosphate Battery for Electric Vehicle
Authors: Cheng Fuqun , Wu Jiang , Wang Hongyan , Zhang Huiyang
Published: December 2022

To improve the cruising range and mobility of EVs, various traction batteries (TBs) have been studied and widely used in China. The operation of EVs is difficult because of the reduction in the capacity resulting from the low temperature. A computer model of an electric vehicle power battery is proposed in this paper to study the effect of temperature on battery performance parameters. The variation of EV battery parameters (voltage, current, capacity) with temperature will be discussed, The change of EV battery parameters (voltage, current, capacity) with temperature will be discussed. Experiments at different temperatures have been constructed to verify the accuracy of the model.
A CO2 Concentration Detection Platform and Temperature Compensation Method Based on Zynq Series SoC
Authors: Du Peng Yuan , Tang Yi Fan , Lv Si Tao , Zhou Guo Fu , Bai Peng Fei
Published: December 2022

Aiming at the problem of low flexibility and poor scalability of Non-Dispersive InfraRed method CO2 concentration detection equipment, a CO2 concentration detection platform based on Zynq series SoC is designed. The platform adopts the idea of hardware-software co-design, which integrates the functions of signal acquisition, time domain filtering, mode control, and data integration, simplifying the hardware design and improving the functional scalability of the system. The platform completes the automatic calibration and temperature compensation and realizes the accurate real-time calculation of CO2 gas concentration. The detection error can be controlled within ±78 ppm in the temperature variation range of 10–60 °C and the measurement range of 0–5000 ppm. The platform is designed with high flexibility, good detection stability, small detection error, little influence by temperature, and strong scalability. It can be organically combined with artificial intelligence, intelligent sensing, and other technologies and has good application prospects.
Performance simulation analysis of new train control system safety communication protocol based on Matlab/SimEvents
Authors: Jing Zhiqiang , Li Kaicheng , Wei Guodong , Liu Yu
Published: December 2022

The vehicle-ground safety communication of the New Train Control System adopts a brand-new underlying network and a communication mechanism of safe and reliable transmission. Based on the GPRS packet switching network, the data link layer adopts the PPP protocol, and the TCP protocol is adopted in the transmission layer to provide reliable transmission services. According to the GPRS network service quality index and the retransmission mechanism of the TCP protocol in the transport layer, this paper adopts the Matlab/SimEvents discrete event simulation method and uses the entity as the communication carrier to conduct a hierarchical and modular system-level modeling of New Train Control System vehicle-ground communication protocol. It simulates the communication process of the message from the application layer, the security layer to the transport layer, and finally transmitted on the GPRS network channel with random delay and packet loss probability. From the quantitative point of view, this paper analyzes the safety connection establishment time and success rate of the new train control system vehicle-ground wireless communication under different channel conditions, the timeliness of the non-periodic message receiving a reply to complete the specific scene function, and the reliability of the periodic message receiving delay. The analysis results show that the new train control system vehicle-ground wireless communication adopts GPRS network and TCP protocol retransmission mechanism to improve the real-time and reliability of communication.
Signal modulation system measuring device
Authors: Gao Zekun , Zhao Xuewen , Ji Mingzhi , Zhou Miaolan , Feng Chenhui
Published: December 2022

The design can measure and display other parameters such as the modulation system of the measured signal output by the signal source, identify and display the modulation mode of the measured signal, and output the demodulation signal. The measurement module is composed of an automatic gain amplifier circuit, a broadband amplifier, a low-pass filter circuit, a DDS signal generation circuit, an amplification circuit, and a display circuit. The working principle of the signal modulation measuring device is that the demodulated AM signal is obtained after the spectrum is transmitted by the multiplier, and the high-frequency signal is filtered out by the low-pass filter and amplified by the fixed gain amplifier. After the amplification circuit, the output waveform is sampled by the onboard ADC of MSP432E401Y, and then the fast Fourier transform is performed to obtain various parameters, which are finally displayed on the serial screen.
Simulation of Metal Surface Crack Detection of RFID Tagantenna
Authors: Zhang Shuang , Zhai Wencheng , Hou Daishuang
Published: December 2022

In view of the current situation of the traditional non-destructive testing technology for metal components, which is characterized by bulky equipment, slow detection speed, small detectable range, and low automation, a method based on the combination of microstrip antenna characteristics and radio frequency technology is proposed to design a microstrip RFID tag antenna based on microstrip antenna characteristics. By calibrating the position of the RFID reader with the tag antenna and the power of its transmitting antenna, the resonant frequency of the tag antenna is affected when cracks exist on the metal surface, resulting in a change in the recognition distance of the RFID system, thus realizing the detection of cracks on the metal surface. The antenna structure is optimized using the HFSS software to simulate the antenna in the presence of cracks on the metal surface, and the simulation results are found to be effective for metal surface crack detection.
Isometric Layering and Shape Optimization of Snow Sculpture Models
Authors: Dong Xubin , Wang Licai , Li Laichun , Wang Kaibao , Xu Weizhen , Wang Haotian , Li Jianyong , Guo Qingdong
Published: December 2022

In this paper, the 3D model of the snow sculpture is discretized by Matlab to do isometric layering to obtain a series of height 2D model cuts on the model. The snow bricks are built into the snow sculpture based on this cut to make the snow sculpture closest to the original model to the greatest extent. According to the similarity of the snow sculpture (i.e. error area), the snow brick-filling optimization strategy is proposed. The robot model building test verifies that the contour layering and optimization strategy are feasible and effective.
Frequency Source Design of Fast Locking Laser Range Radar
Authors: Ting Yang , Wei Nian , Xia Chang
Published: December 2022

Given the bad ranging precision in continuous wave laser range radar systems because of the large jitter of the main oscillator frequency source, this paper introduces the fast locking method, which is based on Field Programmable Gate Array (FPGA) and modified mixed Charge Pump Phase Locked Loop (CPPLL), effectively improving the locking time of PLL frequency source. The input frequency is generated by a temperature compensation quartz crystal oscillator with high stability frequency (TCXO). It improves the PLL performance using the two-order active filter, reduces the phase detector dead-banding, and improves the frequency stability through the buffer insertion in PFD. The traditional PLL was improved by using preset voltage mode, which improves the PLL lock time. Finally, it analyzes the influence of frequency stability on the ranging accuracy of laser radar. The test results show that PLL lock time is up to 1.6ms. It can be applied to continuous wave laser radar ranging systems.
Design of Flue Gas Eliminating White Monitoring System for Natural Gas Boiler
Authors: Feng Dongmei , Dai Dongbing , Zhang Peng , Li Siteng , Liu Zhengguang
Published: December 2022

Aiming at the phenomenon that the flue gas discharged from a heating boiler contains waste heat and harmful gas, which causes energy waste and air pollution, the flue gas eliminating white monitor system based on Programmable Logic Controller (PLC) and MCGS configuration technology is designed. The system structure design is introduced, including the system hardware design, software design, monitoring screen design, and debugging of the physical system. In view of the problem that the waste heat of 45 °C still exists in the flue gas after being treated by the primary heat exchanger, the compressor is used to cool the gas to below 10 °C, which establishes the working conditions of flue gas eliminating white. The experimental results show that the system can control the start and stop of the compressor and the flue gas outlet temperature. The flue gas outlet temperature drops rapidly from about 40 °C to about 8 °C within about 10 minutes and reaches stability. The design of the system not only reduces the air thermal pollution but also establishes the basic conditions for flue gas eliminating white.