bluuebunny/crossref_metadata_2025_split huggingface dataset:
Application of Hilbert Spectrum based on SWT to Low-Frequency Oscillation Analysis
Authors: Wang Xiaoli , Zhou Qi 
Published: December 2022

Abstract
Low-frequency oscillation (LFO) appears in power systems with fast excitation of a unit or large-scale connections. An LFO signal exhibits typical nonstationary and time-varying characteristics. The paper proposed an LFO analyzing technique through the Hilbert spectrum of stationary wavelet transform (SWT). The SWT-based Hilbert spectrum contains time-varying and frequency information of LFO. The analytic framework is introduced, SWT is formulated to decompose an LFO signal into the sum of several coefficient components, the instantaneous parameters of each coefficient are then individually calculated, the complete time-frequency distribution is combined, and finally, the time-varying oscillations characteristics parameters are extracted. The simulation shows that the proposed method effectively reveals time-frequency features of the LFO signal.
An Optimized Variational Mode Decomposition based Denoising Method for Fibre-optical Current Transformer
Authors: Huai Qing , Ji Yirun , Li Yu , Song Peng , Hu Yinghong , Yuan Xi , Zhao Yuan , Gao Jing , Xie Lifang 
Published: December 2022

Abstract
The reliability and effectiveness of fibre-optical current transformer (FOCT) is significantly affected by the noise interference from internal system components and external environment. Therefore, this paper proposes an optimized variational mode decomposition (OVMD) based denoising algorithm to improve FOCT’s performance in the situation with high-level noise. The VMD parameter is adaptively optimized based on target signal and the effective decomposed sub-signals are further denoised with stationary wavelet transform functions. In order to investigate the feasibility of the proposed algorithm, both simulated current signal in PSCAD/EMTDC environment and recorded data of current in converter station of Zhangbei dc gird are considered in this paper. The test result indicates that the proposed denoising algorithm could filter out noise and retain sufficient feature information in FOCT’s output.
Simulation analysis of electromagnetic noise of shaftless rimless thruster
Authors: Ling Junyi 
Published: December 2022

Abstract
In this paper, the shaftless rimless propulsion motor is taken as the research object, and the modal analysis of the stator in free state and constrained state is carried out by using the finite element method. The electromagnetic force is solved by numerical method, and then it is loaded on the stator. The harmonic response analysis of the stator is carried out, and the acceleration and displacement frequency response diagrams of the stator surface are obtained, and the vibration nephogram of the stator is analyzed. The results show that the acceleration and displacement in the radial direction are greater than those in the axial direction, which indicates that the vibration frequency in the radial direction is greater than that in the axial direction under the excitation of the radial electromagnetic force. When the frequency of the radial electromagnetic force is close to the natural frequency of the motor, the motor resonates and the vibration frequency increases.
Research on junction temperature monitoring technology of IGBT modules
Authors: Shen Bing , Sheng Yifa 
Published: December 2022

Abstract
Modular Multilevel Converter (MMC) is widely used in flexible HVDC transmission systems, IGBT module as its core power device, its failure process seriously affects the operation reliability of MMC. The high junction temperature is an important reason for the failure of the IGBT module, so monitoring the junction temperature of IGBT module is an important means to ensure the stable operation of the system. According to the topological structure of IGBT module, the current junction temperature monitoring methods of IGBT module are summarized and compared. According to the shortcomings of the current research and the current research status, the research direction of IGBT module junction temperature monitoring is prospected.
A 3-PRS parallel numerical control machine tool swing angle deviation detection and compensation method
Authors: Dai Liangqiang , Xu Qiang , Chen Xuezhen , Zeng Debiao , Guo Ruihua , Cai Chengdong 
Published: December 2022

Abstract
A method for detecting and compensating the swing angle deviation of a 3-PRS parallel structure CNC machine tool is proposed. The probes fixed on the machine tool worktable are used to pair two standard ball heads with different lengths and the same diameter installed on the spindle. The coordinates are collected, the machine tool swing angle deviation is calculated and obtained, and the calculation result is automatically written into the machine tool compensation file, which replaces the manual detection and compensation of the swing angle error of the parallel machine tool, improves the accuracy and reliability of the detection data, and improves the automation of flexible production. Degree.
Optimal configuration of wind storage capacity based on VMD and improved GWO
Authors: Zhang Yichi , Zhao Feng 
Published: December 2022

Abstract
In view of the fluctuation of the output power of wind power generation, a hybrid energy storage capacity optimization configuration strategy combining variational mode decomposition (VMD) and improved Grey Wolf Optimizer (GWO) is proposed, taking the wind storage joint system as the research object. The sliding average method is used to obtain the target power of the wind power grid connection and use the VMD decomposition processing to allocate the energy storage target power to the different energy storage devices in the hybrid energy storage system. The capacity optimization model of hybrid energy storage system with the minimum annual configuration cost of energy storage system as the target function is established, and the improved Grey Wolf Optimizer is used to solve the model, and the simulation and analysis are conducted on Matlab / Simulink, so as to verify the effectiveness and economy of the proposed capacity optimization configuration method.
A construction and inspection technology of power emergency communication system based on Beidou
Authors: Han Ke , Zhang Yifu , Wang Yong 
Published: December 2022

Abstract
In order to improve the real-time performance of information transmission of power emergency communication system, the construction and inspection technology of power emergency communication system based on Beidou is proposed in this paper. Firstly, the differences between heterogeneous networks are described based on Beidou short message. Then, the fusion probability of heterogeneous network is calculated, and the optimal communication channel is obtained. Next, communication channel link is established, and the maximum transmission range is described. In addition, the network capacity is calculated, the congestion avoidance model is established, the bandwidth is obtained by defining the interference index of the information transmission channel, the total load during the construction and inspection process is calculated, and the construction and inspection of the power emergency communication system are realized.. Experimental results show that the proposed technology has better performance in information utilization, network throughput and system response time.
Research on Line Selection Technology for Two-point Same-phase Ground Faults in Medium-voltage Distribution Networks
Authors: Zang Xin , Yao Yuan , Xu Biao , Qi Haixing 
Published: December 2022

Abstract
At present, the problematic line selection method for single phase grounding faults of the small current grounding system has been mature, but line selection method for two-point same-phase ground faults is rarely studied. For the problem that the accuracy of line selection equipment is low for two-point same-phase ground faults, a fault model is established and the fault signatures are analyzed theoretically. As the faulty line zero-sequence current is affected by more factors, it is not possible to select the line with the common line selection technology for single-phase grounding faults. By further theoretical derivation, a new method for successive judgment of faulty lines is proposed, and the correctness of problematic characteristics and the feasibility of line selection technology are verified to many different cases by simulation using the ATP simulation experimental platform.
Injection signal coding based topology identification method and system for low voltage substation
Authors: Cheng Xianming 
Published: December 2022

Abstract
In view of the low efficiency and low reliability of the traditional topology identification method of distribution station area, this paper proposes a low-voltage station area topology identification method based on injection signal coding. The signal transceiver terminal sends the topology identification signal, which is composed of preamble, equipment ID number and characteristic code composed of multiple groups of characteristic waves. The rest of the signal transceiver terminals judge whether it is on the same branch and the hierarchical relationship through the characteristic code, The intelligent fusion terminal finally realizes the topological relationship of the whole station area by statistics and analysis of the connection relationship and hierarchical relationship between all the branch master tables. A low-voltage distribution station area is selected to verify the topology identification method proposed in this paper. The test results show that the results obtained by this method are consistent with the real household transformer relationship, and the identification accuracy is high, which has certain engineering application value.
Control Strategy for Boost Converter Based on Adaptive Integral Terminal Sliding-mode Control
Authors: Ma Zhen , Yu Qingrui 
Published: December 2022

Abstract
The control system for the fixed-frequency boost converter does not consider the situation from the input voltage and the unknown load, which makes the system vulnerable to external disturbances, resulting in slow system response and large output voltage error. The state space equation of the boost converter is established by the state space averaging method, and the adaptive control rate of the load resistance and the input voltage is designed by the adaptive control, which effectively reduces the influence of the disturbance on the system output. The sliding mode surface adopts the integral terminal sliding mode surface, and the isokinetic approach law control is used to effectively reduce the influence of chattering and improve the dynamic response speed and robustness of the system. The simulation experiment proves the validity and reliability of the integral terminal adaptive sliding mode control.
Consider the distribution network fault recovery strategy with user-side involvement
Authors: Sun Xiaoguang , Geng Jianyu , Geng Bin , Liu Kai , Hou Xu , Wang Yuanzhi 
Published: December 2022

Abstract
With the increasing frequency of extreme weather caused by energy problems, the number of large-scale power outages caused by natural disasters is increasing, which brings greater challenges to the problem of system failure recovery. In recent years, the influx of controllable loads such as demand-side resources such as electric vehicles and energy storage equipment into the electricity market has further enriched the resources and means available for grid fault recovery. Therefore, considering the active participation of power users in the fault recovery of the distribution network, this paper establishes a controllable load model, and at the same time uses the power generation ratio to assess the direct loss of the lost power users, and then assess its importance. In the final solution, the active distribution network recovery power supply strategy with controlled load participation can be solved. Simulation analysis of IEEE33 node system shows that the proposed strategy established can make full use of the user-side demand response resources to prioritize the recovery of important loads, reduce the loss caused by power loss, and improve the recovery efficiency of the distribution network.
Research and Implementation of Power Grid Resource Information data-sharing Technology
Authors: Pei Yongji , Wang Hailong , Li Mingxia , Huang Xinlei , Geng Wanmei 
Published: December 2022

Abstract
To avoid the waste of power grid data resources, under the condition of ensuring data security, the design of power grid resource information data-sharing is carried out. Firstly, the security problems that may be encountered in the process of resource sharing are analyzed, and the data resources are encrypted. Then, when that data carries out information interaction between the terminal equipment and the resource sharing cent, the transfer engine is utilized to process the transferred data and transfer the transfer data. Finally, the sharing of data resources is realized by building a calculation model. The experimental results show that the designed information and data-sharing technology consumes less energy on the terminal equipment, and reduces the workload of the terminal equipment for data transmission. It is hoped that the research of this paper can further promote the research of power grid information resource data-sharing.
XIII Scientific Technical Conference on Low Temperature Plasma During the Deposition of Functional Coatings
Authors: Kashapov N F , Luchkin A G 
Published: December 2022

Abstract
In the city of Kazan from November 2 to November 4, 2021 on the basis of the Kazan Federal University hosted the XIII Scientific Technical Conference on Low Temperature Plasma during the Deposition of Functional Coatings.
One of the main tasks of the conference is to discuss and develop the fundamental principles of plasma deposition of functional coatings. Conference papers were presented in the following areas:
- Physics of gas discharge;
- Physical processes in low-temperature plasma when applying functional coatings;
- Thermodynamic, portable and optical properties of low-temperature plasma in coating processes;
- Interaction of plasma and high-energy ion beams with a solid;
- Combustion processes and heat and mass transfer in multiphase media;
- Dusty plasma;
- Plasma chemistry. Electrochemistry;
- Diagnostics of low-temperature plasma;
- Characteristics of coatings obtained using low-temperature plasma;
- Application of ion-plasma coatings.
Within the framework of the conference, a school for young scientists is held, lectures by leading scientists and specialists in the field of low-temperature plasma application are held.
Gas-discharge plasma is widely used in various fields of science and technology. Plasma is used in industry, medicine, ecology and is the basis of various devices and technologies, for example, it is used in the technology of applying functional coatings.
The friendly atmosphere at the XIII Scientific Technical Conference on Low Temperature Plasma during the Deposition of Functional Coatings allowed it to become an excellent platform for the exchange of experience and generation of new ideas in the field of physics and the use of low-temperature plasma.
This year, studies of gas-discharge phenomena in electrolytes, studies on the use of ultrasound to obtain metal powder in a plasma discharge electrolyte, calculations of electro-contact firing of steel powders were presented. A series of works is devoted to heat and mass transfer in multiphase media and the study of materials and coatings obtained using low-temperature plasma.
List of Organizing Committee, Scientific Committee are available in this Pdf.
Polymer Composite Materials with Dispersive Fillers Modified in a Gas Discharge
Authors: Khubatkhuzin A A , Sharifullin F S , Shaechov M F 
Published: December 2022

Abstract
Radio-frequency gas discharge is a universal method for modifying materials of various physical nature - from dielectrics to metals, including powders, which serve as dispersed fillers when creating polymer composite materials. The issue of creating an interfacial layer at the matrix-filler boundary is an important and urgent task, which makes it possible to obtain monolithic products without defects with improved physical and mechanical properties. The work is devoted to the study of the effect of processing various fillers in a gas discharge on the properties of composites.
Generation of an alternating current discharge in a gas-liquid flow of a copper sulfate solution
Authors: Khafizov A A , Valiev R I , Gaisin Az F , Bagautdinova L N , Gaysin F M , Sh Basyrov R 
Published: December 2022

Abstract
In this work, we studied an alternating current discharge in a copper sulfate solution (3% and 10%) with a distance l=150 mm between copper electrodes located inside a dielectric tube with an electrolyte at atmospheric pressure. On the basis of the obtained electrical characteristics of the discharge, a pattern of discharge generation was presented: electrolysis -breakdown - development of the discharge. Volt-ampere characteristics have a falling character, volt-second characteristics are of a direct exponential type, ampere-second characteristics are of a reciprocal exponential type. Using the fast Fourier transform, the voltage and current spectra were obtained. In the voltage spectrum, it was revealed that the voltage is little subject to fluctuations. It has been established that peaks corresponding to frequencies of 50, 150, 250, 350 Hz, etc. are observed in the current spectrum. It is revealed that the intermediate frequencies present in the current spectrum and constituting an almost continuous spectrum appear as a result of stochastic discharge-breakdown processes.
Numerical solutions of the inverse kinetic problem by the example of the oxygen yield in an alkali electrolyte
Authors: Kashapov R N , Kashapov L N , Kashapov N F , Yu Chebakova V 
Published: December 2022

Abstract
The article presents a solution to the problem of predicting the anode oxygen yield. The numerical algorithm developed by the authors makes possible to determine the rates of constants in electrode processes in accordance with the given experimental yield data, as well as to calculate the concentrations of substances involved in electrode processes at a specific point in time. The implementation of the method is shown as the calculation of the oxygen yield during the electrolysis of a potassium oxide aqueous solution, and it is based on the experimental data. The results of numerical studies are in good agreement with the experimental data.
Upgrade of SARAF fast beam chopper and its applications in Phase I and Phase II of SARAF linac
Authors: Kaizer B. , Shor A. , Zchut T. , Weissman L. , Perry A. , Kreisel A. , Tessler M. , Hirsh T. , Farber E. 
Published: December 2022

Abstract
A fast chopper system has been developed for single-bunch selection for Phase I of the Soreq Applied Research Accelerator Facility (SARAF) in Israel. Further upgrade of the fast chopper system has improved its performance by enabling single-bunch selection for protons and deuterons at a repetition rate up to 220 kHz, with bunch transmission of up to 65% and with neighboring bunch contamination of less than 15%. The upgrade included (1) the redesign of the chopper deflection plates to minimize the electric-field asymmetry and provide more effective single-bunch selection, (2) a new trigger system with better trigger time resolution and better control capabilities, (3) an upgrade of the chopper electronics to increase the repetition rate, (4) the design of the chopper machine protection system, and (5) a general upgrade of the chopper concept to allow for operation in fast and slow modes. The implemented upgrades and the performance of the upgraded system are described. In addition, examples of the first experiments using the neutron time-of-flight (TOF) technique are presented. A fast neutron TOF facility, based on the upgraded fast chopper, is planned for SARAF Phase II. The high neutron flux at SARAF Phase II combined with the upgraded fast chopper system will make SARAF competitive with other advanced neutron research facilities.
Maize genotype selection resistance to fall armyworm (Spodoptera frugiperda J.E. Smith) based on the degree of damaged leaf
Authors: Sebayang A , Muis A , Nonci N , Tenrirawe A 
Published: December 2022

Abstract
Corn as one of the world’s staple food sources has become one of the most important commodities in the world. Indonesia as one of the maize producer countries also strives to improve the quality and quantity of production by genotype varieties that are resistant to specific conditions and are resistant to various pests and diseases. At present, the very high pressure and attack of fall armyworm (FAW) that exceed the economic threshold in maize cultivation is one of the problems that need integrated management, one of which is the formation of varieties that are resistant to FAW. The purpose of this selection test was to obtain the maize genotype resistance of FAW (Spodoptera frugiperda). The research was carried out in Agricultural Technology Research and Assessment Installation, Bajeng, Gowa Regency, South Sulawesi. The total of genetic materials in this test was 13 genotypes (POP 02, POP 03, POP 05, POP 10, POP 11, POP 15, POP 18, POP 21, POP 23, POP 24, POP 26, POP 27, and POP 28) and 2 check varieties (BISI 18 and JH 37). The treatments were arranged in a randomized block design with 3 replicates. The FAW as the test insects was obtained from the environment that had been exposed to it. Observations started 4 weeks after planting (WAP) by observing the total number of damaged plants, the percentage of attacks according to the Davis scale, and the level of plant resistance. All tested genetic materials showed moderate resistance to tolerance to FAW. The highest damage percentage was in the line Pop.18 (46.26%) and the lowest was in POP 11 (7-24%) and POP. 26 (14-26%). The moderate resistant strains obtained were Pop 10, Pop 11, Pop 21, Pop 23, Pop 24, Pop 26, Pop 27, and Pop 28. The results of this study can be continued for the formation of the next generation to obtain resistant strains and can be tested for plant morphology and physiology that trigger the resistance to FAW.
Application of local microorganism solution and lime to improve soil fertility and maize yield
Authors: Yusron M , Mutmainah H , Susilawati P N 
Published: December 2022

Abstract
One of the problems facing in dry land area management is soil fertility. This research was aim to improve soil fertility and maize yields by applying Local Microorganisms (LoM) solution and lime. The research was carried out on dry land area in Mandalawangi Subdistrict, Pandeglang, and Cimarga Subdistrict, Lebak, Banten from June to December 2016. This field experiment was done using Randomized Block Design, where the treatments were three levels of fertilization packages, i.e. (1) 300 kg Urea + 150 kg SP36 + 100 kg KCl; (2) 300 kg Urea + 150 kg SP36 + 100 kg KCl + 1 ton manure + 1 ton lime; (3) 300 kg Urea + 150 kg SP36 + 100 kg KCl + 1 ton manure + Local Microorganism (LoM) solution. The research results show that applicaton of LoM solution and lime significantly improved soil biology. The application of lime and LoM solution increased soil respiration, where level of soil respiration was higher on the application LoM solution than lime. Application of LoM solutions significantly improved soil microbe activities, which in turn affected the maize growth and its yield. Application of LoM solution increased maize yield by 37.92%.