bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research and design of low-power, high-performance processor based on RISC-V instruction set architecture
Authors: GuangTang  , Jiancheng  , Li  
Published: May 2022

Abstract
In embedded IoT applications, in order to meet the needs of small area, low power consumption, and high performance, this paper designs a 32-bit low-power, high-performance microprocessor based on the RISC-V instruction set architecture. It uses a 3-stage pipeline structure with static branch prediction function, supports RV32IM instruction set, and adopts AHB bus as the control bus. The logic function of the processor was verified under the iverilog environment, and the simulation results showed that the processor can run normally. The CoreMark score of 2.38 CoreMark/MHz was measured by running the CoreMark running program, and it supports FreeRTOS transplantation. The analysis and verification results show that the design can be well applied to small-area, low-power embedded application scenarios.
Research on the reliability of Micro LED high-density solder joints under thermal cycling conditions
Authors: Liu Mingyang , Nie Junyang , Liu Yifeng , Sun Jie , Li Min , Yan Chunli , Yan Qun 
Published: May 2022

Abstract
For the purpose of studying the effect of high-density, small-size solder joints on the thermal fatigue life of display devices, a 3D model of the corresponding device structure is established, using finite element analysis methods, and using Anand constitutive equations and Coffin-Manson life prediction models. The equivalent stress and strain change law of an indium solder joint with a diameter of 10 μm under thermal cycling loading conditions is explored, and the key position of the solder joint damage is inferred based on the simulated strain cloud diagram. In addition, the influence of different bump height, bump contact area and Under-Bump Metallization (UBM) thickness on the thermal fatigue life of solder joints is studied separately. The final simulation results show that the location where the solder joint may be damaged first is at the point on the outer side where the solder joint is connected to the UBM on the edge away from the center point. The height of the bump and the contact area of the bump have a significant effect on its thermal fatigue life. In the actual experiment, we should focus on the impact of this aspect.
A low resource consumption Arbiter PUF improved switch component design for FPGA
Authors: Yang Jingfu , Yu Xiaoping , Wei Rikun 
Published: May 2022

Abstract
Aiming at the problems of poor uniqueness and high resource consumption of slice after the implementation of Arbiter physical unclonable function (Arbiter PUF) on field programmable gate array (FPGA), a new improved scheme of switch component structure is proposed. The switch component structure of the improved scheme adopts the parallel-connected mode to improve the uniqueness of the circuit, which avoids the cross-connected mode unable to achieve symmetrical layout on FPGA. At the same time, the improved scheme uses lookup tables to construct the structure of programmable delay line (PDL) with a multiplexer (MUX), which can reduce the internal resource consumption of slice while receiving the same 64-bit challenges. The improved scheme was tested on FPGA boards, the uniqueness and steadiness of different switch component schemes are compared and analyzed, and the feasibility of the improved scheme is verified. The results show that in the generation of Arbiter PUF, compared with the conventional scheme, the improved scheme reduces the resource consumption and improves the uniqueness by 22.2%; Compared with the MUX + MUX scheme, the improved scheme saves 50% of resource consumption while maintaining good uniqueness.
A Design of MIPI DSI Interface for LCD Display Driver
Authors: Liu Yeming , He Chengyue 
Published: May 2022

Abstract
With the development of HD display field, the display interface needs a standard, stable, scalable, low-power, and high-speed solution. Traditional serial interfaces such as TTL, LVDS and RGB have some shortcomings in terms of power and speed. In addition, parallel interfaces need to involve more than 10 channels of signals, and the display-related applications have up to 20 channels. A large number of signals increase the difficulty of wiring, and limit the frequency and transmission distance of the signal, and also restrict the miniaturization of the product, so it has been gradually eliminated by the new technologies. The development direction of the interface technology is mainly low-voltage, high-speed, serial, and miniaturization to meet the demanding requirements of the mobile market for the cost, volume, weight, power consumption, performance and reliability. This paper proposes a solution of serial interface applied to display technology, which is compatible with DPI, DBI and DCS interface. The MIPI DSI receives the pixel information from the host in serial mode. There is an independent protocol in the communication filed, and the interface can support the design of 1080p/60fps display driver.
Strain distribution and electrical characteristics of flexible low-temperature polysilicon thin film transistors under biaxial bending
Authors: Fang ZhiXuan , Huang Zeng , Xie Na , Liu Zheng , Li Dong , Li YiLin , Sun YeRong , Yao ZhiWen 
Published: May 2022

Abstract
This paper investigates the strain distribution of flexible p-channel low temperature polycrystalline silicon thin film transistors under biaxial bending. The strain distribution of LTPS TFTs under different bending conditions is analysed by finite element analysis. 𝛆r and 𝛆θ are essentially equal and constant within the load ring. The finite element analysis shows that when the biaxial bending strain condition is 2.5%, the strain distribution is mainly concentrated at the contact angle between the electrode and the oxide layer. This strain is significantly greater than the overall strain of the device, which is the main reason for the bending performance of the device. We found that under biaxial bending, the threshold voltage shifts towards the negative axis as the biaxial strain increases. Within this strain range, these electrical properties are evident under biaxial strain conditions. Comparing theoretical threshold voltage shifts based on energy band changes with experimental results under biaxial strain, it was found that changes in trap density should also contribute to the threshold voltage shift.
Design of Continuous Class-F Mode Power Amplifier with High Gain Flatness
Authors: Ji Qinmeng , Chen Du , Chen Zehui , Zhao Yongjiu 
Published: May 2022

Abstract
In this letter, a novel RF power amplifier (PA) with high gain flatness and high efficiency operating in continuous Class-F mode is introduced. Since most continuous Class-F PAs can’t meet the requirement of high gain flatness, a new structure which can achieve high gain flatness is presented. A 1.7-2.5GHz PA is designed, which uses CGH40010F GaN device. Simulation results show that the drain efficiency (DE) of the continuous Class-F PA is between 69% and 79%, output power is more than 41dBm across the whole bandwidth. Gain is between 11dB and 11.8dB, and gain flatness is 0.8dB.
A high-range reference voltage low-dropout regulation design for voltage-controlled oscillator circuit
Authors: Song Shengyu , Yuan Hengzhou , Chen Jianjun 
Published: May 2022

Abstract
The stability of VCO as a clock recovery module in high-speed transmission circuits cannot be ignored. The LDO circuit as its power module not only needs to ensure the stability of the VCO under high-speed working conditions, but also needs to satisfy the demand for changes in its supply voltage swing. To meet the above requirements, a high-range reference voltage LDO (Low-dropout Regulator) was designed under the 28nm process. The input of the error amplifier of the LDO adopts a rail-to-rail structure, the reference voltage can be changed in a larger range, and the output voltage can also fluctuate in the range of 0.3V-0.9V. After simulation, the power supply rejection ratio (PSRR) of this LDO is 1.53MHz, the line regulation at full load is 8.29mV/V, the internal noise of the circuit is low, the transient response time from on load to full load is 42ns, and the phase margin is close to 80deg.
Evolution of Silicon Wafer Dimensions
Authors: Peng Jialiang , Liu Anwei , Wang Muyang 
Published: May 2022

Abstract
Solar energy is a renewable energy that the world is endeavouring to utilize. The solar cell is the essential invention that makes energy transfer from light to electricity possible. Solar cells are normally made from silicon wafers due to silicon’s semi-conductivity. The thesis will focus on the development of silicon wafers’ size and fabrication technology. Through analysis of resent (in 5 years) statistics from reports released by government or incorporations, the link between the trend and the reasons behind is interpreted. ITRPV has pointed out that silicon wafers are switching to the mono-crystalline ones, the larger ones, and the PERC processed ones. The mono-crystalline ones excel in efficiency due to uniform lattice structure, but is more costly because of the Czochralski process. The larger cells can absorb more sunlight. The PERC cell technique reduces recombination and reflects unabsorbed sunlight, therefore gradually eliminates the traditional BSF technique.
Automated Quantum Volume Test
Authors: Liu Xiaonan , He Ming , Wang Junchao , Xie Haoshan , Zhao Chenyan 
Published: May 2022

Abstract
As a benchmark for the overall performance of quantum computers, quantum volume has the advantage of being able to reflect the depth of running quantum circuits. But, the quantum volume test code provided by IBM needs to be executed manually, and the simulation result of the quantum simulator is used as the result of the volume test, so that users cannot quickly and accurately test the quantum volume of the actual quantum computer required. In response to this problem, this paper designs an automated quantum volume test program. The program automatically generates quantum volume sequences, selects the number of executions of quantum circuits, and defines real quantum computers to facilitate users to perform quantum volume tests on quantum computers provided by the IBM Quantum Cloud Platform. Simultaneously, according to the automated test program, the quantum volume of IBM’s four small superconducting quantum computers was tested. The test results show that (1) the quantum computer is different, and the qubit layout and execution times ntrials are the same, will cause the quantum volume is uncertain; (2) the same quantum computer, whether ntrials is the same, the robustness of qubit coupling will be affected to a certain extent.
Research on path optimization of electric distribution vehicle with hybrid charging strategy
Authors: Chang Jing , Zhang Qiqian , Zhang Honghai 
Published: May 2022

Abstract
At present, the number of new energy vehicles in China is increasing year by year. In the field of logistics and distribution, new energy vehicles are also showing vigorous vitality. This paper presents a two-stage optimization method for electric vehicle routing problem with hybrid charging strategy. In the first stage, a fuzzy transitive closure method is used to group customer orders, in the second stage, the decision variables and constraints related to the charging strategy are introduced, and a mixed integer linear programming model considering the three charging strategies of fast charging, slow charging and fast switching is constructed, finally, the validity of the proposed model is verified by a instance.
The interference cancellation of non-dispersive UV based on active noise control
Authors: Fan Bo-Qiang , Zhang Yu-Jun , You Kun , He Ying 
Published: May 2022

Abstract
In the process of gas measurement using non-dispersible UV detection technology, the quality of optical signal is directly related to the inversion of concentration. Traditional methods of improving the quality usually processed the detector signal directly, which destroy useful information, and is difficult to eliminate the overall interference of the environment to the detector. The analog circuit system for interference cancellation is designed based on active noise control (ANC) in the paper. The interference channel is added to obtain external noise signal, which through inverting, amplitude and phase adjustment superimposed on the measurement signal by the ANC system, and the digital potentiometer AD5263 is control to optimize by the MCU. The simulation results show that noise standard deviation decrease from 75.16mv to 10.27mv. And the correlation between the processed signal and the NO2 concentration reached 0.99768, which shows the system can be applied suitably in the non-dispersible technology.
Welding defect signal extraction technology based on GAMP-SBL algorithm
Authors: Qi AiLing , Wang JiaSen 
Published: May 2022

Abstract
Flip chip technology has been rapidly developed and widely used in the field of microelectronic packaging, and defect detection has also received more and more attention. Aiming at the problem that noise affects the location and extraction of signal defects in ultrasonic testing, the sparse Bayesian learning based on generalized approximate message passing (GAMP-SBL) algorithm is used to extract signal defects, and the over-complete Gabor dictionary is used to reconstruct signal defects to effectively improve Sparse decomposition algorithm. The precision experiment tested the defect simulation signal and the actual ultrasonic signal respectively, and compared with the greedy algorithm. The experimental results show that the GAMP-SBL algorithm can more effectively extract the defect signal under the noise background.
Research on ultra-tight integrated navigation method based on CKF filtering algorithm
Authors: Zhao Jiafan , Zhao Xin , Li Quanhu , Zhang Jingyu 
Published: May 2022

Abstract
This paper takes the SINS/BDS ultra-tight integrated navigation system as the background of research. Based on the existing integrated navigation nonlinear filtering algorithm, an ultra-tight integrated navigation method based on CKF filtering algorithm is proposed. Compared with the EKF and UKF algorithms, the CKF algorithm reduces the errors caused by intercepting higher order terms in the EKF, overcomes the problem of difficult to determine adjustable parameters in the UKF in practical applications, and greatly reduces the computational effort. Because of the above advantages nowadays the research focus of filtering algorithms is more on CKF algorithm related methods. The EKF, UKF and CKF are applied to the SINS/BDS ultra-tight integrated navigation system for simulation and comparison analysis in order to verify the performance of the algorithm. The simulation results show that the CKF algorithm is an effective and feasible algorithm for integrated navigation method because its stability, filtering accuracy and adaptability are synthetically better than those of the EKF and UKF algorithms.
Text data mining of power based on natural language processing technology
Authors: Wang Xin , Tian Jiming , Li Fei 
Published: May 2022

Abstract
This paper first introduces the development of text mining technology, points out the difficulties of text mining technology, and then designs the power text mining based on natural language processing technology Then it introduces the typical application of text data mining technology in 95598 customer service complaints. Finally, it puts forward the application effect and challenge of power text mining.
A Fuzzy Query Method Oriented to Knowledge Graph
Authors: Liu Yunxing 
Published: May 2022

Abstract
With the widespread application of Knowledge Graphs, Knowledge Graph query technology has received widespread attention. The daily use of natural language usually contains fuzzy terms. The use of fuzzy terms in queries is more in line with natural language habits. Therefore, fuzzy questions have been widely discussed and applied in relational data models, and their use in NoSQL data models has also begun to be affected in recent years. RDF (Resource Description Framework) is a representative model of the knowledge graph, and SPARQL is the standard query language of RDF. To realize the fuzzy query of the knowledge graph, this paper introduces the unclear expansion syntax of aggregate function based on summarizing and analyzing the existing SPARQL fuzzy expansion. Supplements the qualitative preference analysis method then proposes and SPARQL1. 1 Corresponding fuzzy SPARQL1.1 (f-SPARQL1.1) simultaneously provides strategies and techniques for rewriting ambiguous queries into classic SPARQL queries. In addition, this article also provides a visual interface for defining the membership functions of fuzzy terms and provides three interactive methods for setting fuzzy membership functions. Compared with the previous fuzzy query methods for RDF models, the method proposed in this paper has more vital fuzzy query ability and more flexible universality. The experimental results show the usability of the method proposed in this paper.
Scatter correction using FBP with data rearrangement for a single full scan CBCT
Authors: Kang Guanyu , Han Yu , Xi Xiaoqi , Li Lei , Tan Siyu , Zhao Hongfeng , Yan Bin 
Published: May 2022

Abstract
A scattering plate consisting of multiple lead strips is an effective tool for scatter correction and dose reduction in cone-beam CT(CBCT). Existing scattering plate correction methods take advantage of data redundancy by partially blocking cone beam data from a single scan to make up and perform scattering correction. However, for geometric objects with large cone angles during CBCT scans, existing backprojection-filteration(BPF) algorithms cannot accurately reconstruct the object due to data inconsistency and truncation, and may produce additional image artifacts. In order to improve the image quality at large cone angles, this paper proposes a hybrid scatter correction method for filteration-backprojection (FBP) image reconstruction from partially blocked cone beam data using data rearrangement. The proposed method uses a blocker consisting of multiple lead strips that are placed between the light source and the object to provide scatter correction and image reconstruction with beam-blocked data. In combination with a data rearrangement algorithm, the cone-beam projection data is rearranged into a tilted parallel projection data, followed by weighted filtering and inverse projection reconstruction. The experimental results of CBCT show that the proposed method effectively corrects the scattering in each projection and reconstructs the scatter-corrected image from a single scan.
Topology Modeling for Reconfigurable Scan Networks in IEEE 1687 Networks
Authors: Xu Yizhen , Chen Shouhong , Ma Jun , Xu Cuifeng , Zeng Ke 
Published: May 2022

Abstract
This paper designs an automatic generation method of Reconfigurable Scan Networks (RSNs) directed topology model combined with graph theory. By studying IEEE 1687 chains information, RSNs directed topology model is generated automatically based on the interconnections between on-chip instruments and the corresponding internal register length which are determined on standard Instrument Connectivity Language (ICL) script. The test and result analysis demonstrate the feasibility and effectiveness of the technology, which solves the inefficiency and high error rate of RSNs directed topology model built by artificial analyzing ICL script.
Analysis and Measures of Blockage in Submerged Nozzle of Mold large round Bearing Steel
Authors: Wang Weining , Sheng Guangye , Liao Zhiyou , Wang Haichuan , Qiu Shengtao 
Published: May 2022

Abstract
A blockage formed at nozzle of mold during casting of GCr15 bearing steel. The chemical composition and morphology of the nozzle blockage were analyzed by scanning electron microscope/energy dispersive spectrometer and X-ray fluorescence spectrometer. The nozzle blockage was improved by a series of measures such as high carbon tapping, optimization of rapid slag making operation, improvement of slag system, adjustment of static time soft blowing system before casting and tundish and nozzle materials.
Research on the control technology of Ds inclusion and Oxygen content in GCr15 bearing steel
Authors: Li Huicheng , Xie You , Dou Naiyuan , Wang Litao , Jiang Liping 
Published: May 2022

Abstract
This paper presents a method for controlling Ds inclusions and oxygen content in bearing steel produced by EAT-LF-VD-CCM process, including EAF initial refining process, LF external refining process, VD vacuum treatment process and continuous casting production process. By reasonably reducing the basicity of slag, adjusting the amount and sequence of alloy addition, the carbon content of EAF steel is appropriately increased and the temperature of steel extraction is reasonably selected. Optimize the amount of deoxidizer added in off~furnace refining, improve the basicity of refining slag, control the vacuum time, aluminum loss and stirring volume; In the continuous casting process, middle alkaline coating agent, constant drawing speed and protective pouring process are used to control and remove Ds inclusions in bearing steel. The bearing steel produced by this process can remove big sized Ds inclusions in the steel, while the total oxygen content is controlled below 7ppm.
Microstructure and properties of AC-HVAF sprayed B4C/Ni composite coating
Authors: Zhou Bingwen , Wang Chao , Jing Dong , Meng Linggang , Bin Ya , Zhang Huanyue , Zhang Xingguo 
Published: May 2022

Abstract
In industrial application, the service life of TC4 material is easy to be shorten by wear and corrosion. Thus, to improve its surface hardness, wear and corrosion resistance, a process for preparing B4C/Ni coating was proposed, and The microstructure, hardness, wear and corrosion resistance of the coating were studied. The main phases of the composite coating are B4C, Mi3B, Ni3Al2 and C; The porosity of the composite coating is about 2.3%. The average hardness is 591 HV0.3, about 1.7 times of the substrate. In the form of dry friction, the friction coefficient is about 0.41 and the wear rate is 4.997×10-5g-m-1, which is about 20% lower than that of substrate. The corrosion resistance of the coating in 3.5wt.% NaCl solution is significantly improved, its corrosion potential is -0.352V, and corrosion current density is 3.992×10-8 A·cm-2, both are lower than WC coating. Thus, B4C/Ni composite coating prepared by HVAF has high hardness, good wear and corrosion resistance.
Simulation analysis of SR motor speed regulation system based on PI control
Authors: Zhang Chenbo , Chen Kai , Yu Jun , Zhang Qian , Huo Chunrun 
Published: May 2022

Abstract
The switching reluctance motor speed regulation system (SRD) will produce more serious nonlinear problems when running, and the current conventional solution is analyzed and discussed as a PI control method(HE 2008). Based on the SR motor model included in Matlab/Simuliunk simulation system, the simulation results are obtained by using the comparison method with or without PI control, and the advantages and disadvantages of the PI control method are analyzed to achieve the requirements for the switched reluctance motor control system.
Plasmon gain in HgTe/CdHgTe multi-quantum-well heterostructures
Authors: Rudakov A O , Ya Aleshkin V , Gavrilenko V I 
Published: May 2022

Abstract
The work is devoted to the theoretical study of plasmon gain in HgTe/CdHgTe multi-quantum-well heterostructures. The spectra of plasmons and plasmon gain are found in structures with 2–8 quantum wells (QWs) under the condition of inverse band population. A nonmonotonic increase in the plasmon gain with an increase in the number of QWs is shown. The dependence of the threshold concentration of nonequilibrium carriers for stimulated plasmon emission on the number of QWs in structures with 1–8 QWs has been studied.