bluuebunny/crossref_metadata_2025_split huggingface dataset:
Tracking of an underwater source using sparse method
Authors: Pratiwi R U , Arifianto D , Anggrayni E , Widjiati E , Sukirman O , Amelia R R 
Published: May 2021

Abstract
The sparse method or better known as compressed sensing (CS), is a method often used for the signal reconstruction process. This method had considered better than conventional methods because it can reconstruct a signal with a smaller amount of data. Many algorithms had used for signal reconstruction using the CS method, including l1-minimization and orthogonal matching pursuit (OMP). In this study, the two algorithms were used for signal reconstruction of underwater objects and then compared to find out which algorithm is better for the signal reconstruction of underwater objects. Comparing the two algorithms had based on parameters in the form of PSNR and RMSE against sparsity. Based on the simulations that had been doing, known that the l1-minimization algorithm can reconstruct signal up to 40% sparsity. Whereas the OMP algorithm can only reconstruct signals up to 30% sparsity. PSNR and RMSE generated from the l1-minimization algorithm show that this algorithm provides better reconstruction results than OMP for underwater object signals. The results obtained show that the best tracking process is at an angle of incidence of 90°.
Folded planar resonator-based sonic Crystal scatterer: Part I. Shifting from split tube resonator design
Authors: Yahya Iwan , Suparmi  , Cari  , Ubaidillah  
Published: May 2021

Abstract
A split tube resonator (STR) is one of the typical base structures in many previous acoustic metamaterial structures. This paper introduces a brand new approach to designing the tunable concentric wall resonating structure to look like a similar shape but with a different response and performance to STR. The central concept is a planar resonator folded outward and inward direction. We found that the proposing approach gives the possibility for a single geometrical dimension tunable sonic crystal element that could not occur in a single degree of freedom conventional STR. The test model made of stiff paper and the sound absorption performance test conducted experimentally with impedance tube refers to ASTM E-150-98 standard.
Research and design of digital unit for direct digital frequency synthesizer
Authors: Lei Tong , Liang Liu 
Published: May 2021

Abstract
The direct digital frequency synthesizer (DDS) is a new kind of all digital frequency synthesizer, which has fast frequency switching speed and high frequency resolution. It has been widely used in the field of signal processing. In this article, we analyze the basic principle of DDS and study several methods of phase-amplitude conversion. We use the method of searching ROM table for rough rotation and the optimized CORDIC algorithm based on excess-fours structure for fine rotation to achieve the phase to amplitude conversion. The power consumption and area of the fine rotation element are reduced with the preprocessing of the phrase. The output frequency is increased by using a 4-channel-interpolation structure. After the design is completed, we verify its correctness and evaluate its performance. The results show the phase-amplitude conversion algorithm meets the need of correctness and the DDS can work stably at 1GHz.
Design and Implementation of Indoor Visible Light Communication System based on High Order PAM
Authors: Wei Tongcheng , Zhang Bo , Lin Changyong 
Published: May 2021

Abstract
At present, most indoor visible light communication systems use switch keying, pulse position modulation and digital pulse interval modulation. These three modulation methods cannot effectively overcome the inter-symbol interference caused by the multipath effect in the visible light communication system. Compared with the above three modulation methods, high-order pulse amplitude modulation (Pulse Amplitude Modulation, PAM) transmits more bits in the same symbol, which can further improve the modulation efficiency and the communication rate of the system. At a given data rate, the inter-symbol interference caused by multipath effects can be reduced. Using TMS32C6748 floating-point DSP as the control chip of the optical communication system, an indoor visible light communication system based on high-order PAM is designed and implemented. The communication performance of the system is verified by building an experimental platform. The experimental results show that the communication system has the advantages of low bit error rate, high modulation efficiency, and high reliability, and meets the requirements of high-performance indoor visible light communication systems.
Effect of Threshold Switching Selectors on One-Selector One-Resistor Crossbar Arrays
Authors: Dai Yuehua , Wang Peng , Gao Jianhua , huaHuang Li , Ding Renjie , Yang Fei 
Published: May 2021

Abstract
In this paper, the influence of selector on the performance of 1S1R crossbar array memory is focused. First, a read-write circuit is designed based on the 1S1R cell model, which is a Verilog-A physical model built by our research team in the former work. Then, the parameters of selector (Vth, Vhold, RS-on, RS-off,NL) with different array sizes are calculated and analyzed. Different from the influence of selector on 1S1R cell, the read/write margin and read/write power consumption of the 1S1R crossbar array are impacted by selector significantly. Selectors with large Vth improve the write margin, but too large Vth reduce the read margin.The ON-resistance of the selector affects the read power consumption more than the OFF-resistance of the selector does, and the larger nonlinearity improves the overall performance of the crossbar array. Finally, this new 1S1R crossbar array memory is compared with 1R crossbar array memory and the result proved that the optimized memory can reduce the leakage current and power consumption to the large extent.
A FAST RFT METHOD BASED ON MULTIPLE FILTERING
Authors: Shen Mengmeng , He Feng , Dong Zhen , Gan Nan , Wu Manqing 
Published: May 2021

Abstract
A fast RFT method based on multiple filtering (MF-RFT) is proposed in this paper. The method on the basis of Radon Fourier Transform method, first of all, according to the target RCS and scenarios to determine or calculate the first decision threshold selection mode, the strong scattering points in the target echo are selected. Then, RFT and other traditional algorithms are used to achieve long-term coherent accumulation, which greatly reduces the calculation amount of the original method on the premise of ensuring the performance of parameter measurement and target detection. Then, the high efficiency and robustness of the proposed method in certain scenarios are proved by formula derivation and simulation.
Interactive Multi-Model Independent Joint Probabilistic Data Association Filtering Algorithm
Authors: Yu Xue , Xi-an Feng , Ni Zeng 
Published: May 2021

Abstract
Aiming at the problem of redundant calculation of the Interactive Multi-Model-Joint Probabilistic Data Association Filtering (IMM-JPDAF) algorithm, an Interactive Multi-Model Independent Joint Probabilistic Data Association Filtering algorithm is proposed. The algorithm uses model probabilities as priori information to reliably estimate the parameters of the maneuvering target motion model, and then uses them in the JPDA module, so that the JPDA can exist independently of the model filters. The simulation results show that the proposed algorithm can save about 20% of the calculation amount without reducing the accuracy of the target tracking, effectively reducing the redundancy.
Interface mechanical behavior of gold alloy wire bonding
Authors: Xie Shuang , Lin Pengrong , Yao Quanbin 
Published: May 2021

Abstract
The connection between the internal chip and external pins of the semiconductor package and the connection between the chip play an important role in establishing the electrical connection between the chip and the outside and ensuring the input/output between the chip and the outside. It is the key to the entire subsequent packaging process. Wire bonding has a dominant position in connection methods due to its simple process, low cost, and application of a variety of packaging forms. In high-reliability fields such as military and aerospace applications, bonding wires are usually used as chip interconnect materials. The bonding wires have good electrical conductivity, thermal conductivity, and oxidation resistance, but there are some reliability problems in bonding due to the production of Au-Al compounds. In this paper, Al element is used to modify the bonding alloy wire innovatively, the mechanical properties of Au-Al and Au-Pd system bonding points and the growth and evolution of IMC are studied, and the influence of Al and Pd elements on the reliability of bonding points is evaluated.
Research on Homogenization Treatment of Mg-8wt.% Sn-1.5 wt.% Al Alloy
Authors: Zhaoqian Sun , Yongjun Li , Kui Zhang , Xinggang Li , Minglong Ma , Guoliang Shi , Jiawei Yuan 
Published: May 2021

Abstract
The microstructure and morphology of Mg-8wt.%Sn-1.5wt.%Al alloy during homogenization were investigated by optical microscope (OM), scanning electron microscope (SEM), energy dispersive analysis (EDS) and HCT-3 comprehensive thermal analyzer. The results show that plenty of dendrite segregation arise in the as-cast alloy, and non-equilibrium eutectic phases distribute along the grain boundaries; at the same time, a large number of Sn and Al atoms segregated. The differential scanning calorimetry (DSC) curve shows that only one endothermic peak (549 °C) exists, which is caused by the redissolution of Mg2Sn phase; according to the homogenization empirical formula, 460 °C to 500 °C is the appropriate heat period. However, surface oxidation appears when treated at 500 °C; so atmosphere (Ar2) protect was used, after treating for 500 °C×48 h, ideal resolution effect has been achieved.
Failure analysis of sensor diaphragm cracking
Authors: Huan-ping Kong , De-lin Liu , Chang-kui Liu 
Published: May 2021

Abstract
The sensor diaphragm cracked during the test project. Through macro and micro morphology observation, metallographic examination and hardness test, the diaphragm failure properties and reasons were determined. The results showed that the failure nature of the faulted diaphragm was bidirectional bending fatigue cracking. 1# crack failure was related to the greater bending stress borne at the bottom of the outermost corrugation. 2# crack failure was related to the greater stress borne by the root at the boundary between the outermost corrugation and the outer edge, the appearance of grain boundaries caused by the pickling process promoted the initiation and propagation of 2# crack.
Region of Interest Coding Based on Convolutional Neural Network
Authors: Jinkai Yang , Guozhong Wang , Liangqi Zhu 
Published: May 2021

Abstract
The traditional region of interest coding method mainly uses low-level features to detect the Region of Interest (ROI). The ROI detected by it is poor in stability and is not easily interfered by noise. In this paper, ROI detection is performed on the image through a deep convolutional network to obtain a stable ROI based on the high-level feature extraction of the image, and then the discrete cosine transform (DCT) is performed on the image and divided into coding units. According to whether the coding unit is an ROI, To determine the quantization matrix used when encoding it. This article uses fine quantization for coding units that belong to ROI, and coarse quantization for non-ROI coding units. In this way, it can be ensured that the compression rate is greatly reduced without affecting the subjective perception of the image. Experiments show that the compression rate of this method can reach about 84%, and the weighted peak signal-to-noise ratio is improved by about 0. 99dB on average compared with JPEG encoding.
FlexRay bus data fault diagnosis based on Zynq
Authors: Peng Liu , Jia Li , Zefeng Yang 
Published: May 2021

Abstract
CAN bus and LIN bus are widely used as communication bus in automobile industry.As a new type of automobile bus, FlexRay bus, with CAN bus and LIN bus do not have many advantages. FlexRay bus bandwidth is not limited by protocol mechanisms,and it use the synchronization-based access methods. And because of its unique dual-channel data transfer mode, which is especially suitable for the current automotive wire control system, it replaces the mechanical and hydraulic working mode of traditional automobile. And the FlexRay data transmission rate is fast, it can quickly transmit data to the car’s electronic control unit. Zynq as an extensible platform combining ARM and FPGA,satisfying the programmability of the software,it also meets the programmability of hardware. Zynq chip functions can be divided into two working parts, A PS,another is PL. PS is the ARM part, mainly responsible for data storage and display module control and other functions; PL is the FPGA part, the main functions are data acquisition processing and time unification. Using based on Zynq data diagnosis FlexRay vehicle bus, can make data transmission more reliable and efficient, It can also effectively reduce the power consumption of the whole system.
Design of Compact Dual-band High-gain Planar Antenna for WLAN
Authors: Gou Zhong-Rong 
Published: May 2021

Abstract
A compact dual-band planar antenna with high gain for WLAN application is presented. The antenna fed by CPW is composed of T-type feed and double C-type meander line, which generate the higher and lower operation bands respectively. DGS structure in CPW ground broadens the bandwidths of high frequency. Through electromagnetic simulator software simulation and analysis, the overall size is 30×15.25×1.6mm. The simulation results show that the proposed antenna can operate in 2.35∼2.52GHz and 3.85∼6.14GHz, which cover the WLAN operating bands of IEEE 802.11n and 802.11a/b/g. The gain is 1.42dBi at 2.45GHz, and 4.42dBi at 5.2GHz, and 5.38dBi at 5.8GHz, respectively. The radiation patter of the antenna is omnidirectional and has higher gain.
Study on electronic structure and optical properties of doped ZnO system
Authors: Wei-rong Qiang , Xiao-mei Wang , Wei-qi Liu 
Published: May 2021

Abstract
In this paper, the electronic structure and photoelectric properties of P and Cu doped ZnO systems have been studied by Density functional theory method. The results show that the formation energies of ZnO-P-Cu, ZnO-P-2Cu, ZnO-P and ZnO-Cu systems decrease in turn Compared with the intrinsic ZnO system, the ZnO-P, ZnO-P-Cu, ZnO-P-2Cu and ZnO-Cu systems have higher activity, the band gap of ZnO-P and ZnO-P-2Cu systems is reduced, and the electron transition is easier. In the doped system, the peak of the dielectric function shifts to the left and increases, the absorption of the electron to the photon increases obviously, and the absorption spectrum appears red shift, from the calculated results, it can be concluded that P and Cu single-doped and co-doped ZnO have great influence on the electronic structure and optical properties of ZnO system, which provides a theoretical basis for further study of the influence of doping on the properties of ZnO.
Research on Thermal Characteristics of IGCT Based on Structure Function
Authors: Wang Weiyan , Zhang Xiaoling , Xie Xuesong , Huang Kunkun , Tan Yuhang 
Published: May 2021

Abstract
According to the principle of heat conduction during the operation of semiconductor devices, a GCT package model of IGCT devices is established. Perform transient simulation and use structure function analysis software for analysis. Based on the thermal resistance and heat capacity curve obtained by the structure function analysis method, the factors that may affect the thermal characteristics of the device are analyzed from the two angles of the thickness of the molybdenum disk and the thickness of the copper cathode. Thermal analysis of the 1μm micro-gap on the surface of the molybdenum disk and suggestions for improvement were put forward. The research results show that the structure function method is a non-destructive analysis method that can obtain the thermal resistance and heat capacity of each layer inside the device with high accuracy. The application of this method can analyze the internal microstructure changes of the device, and provide convenience for the research and evaluation of the thermal characteristics of the device.
A research on the spectral Bidirectional Reflectance Distribution Function measurement of tensile polyimide film rough surfaces
Authors: Mei Ming , Hailan Zhu , Yi Cai 
Published: May 2021

Abstract
The reflection distribution function is important for calculating the scatter distribution on material surface. In order to calculate the light scatter distribution of the tensile polyimide, it is necessary to investigate the relationship between the Bidirectional Reflectance Distribution Function (BRDF) of tensile polyimide film with its surface roughness and the incident light, and test the fitting function to evaluate the BRDF. The measurement spectrum is from 300nm to 750nm. The measurement results show that the BRDF of polyimide film are different with the tensile stress, and the reflectance intensity in the reflective direction decreases with the increase of the tensile stress, increases with the wavelength of the incident light. The reflectance intensity is associated with the roughness changing of polyimide surfaces for the tensile stress, as the roughness increases with the more stress, and the intensity increases in the none reflective direction. The fitting precision is up to 95% applying with the T-S model compared with the classical Phong model. The research data can be used to evaluate the reflective intensity of pharmaceutical packaging film, medical light barrier film, thermal insulation film and other film materials.
Identification and recovery path planning of Marine garbage patch based on Machine vision
Authors: Zhang Wenbin , Zhao Sheng 
Published: May 2021

Abstract
At present, the environmental problems in the water are becoming more and more prominent, and many teams are working on the research of the automation of garbage collection at sea. In order to a ready-made sea on the garbage recycling equipment automation, intelligent recognition for all white plastic and in identifying regional planning the path of the recycling of recycling equipment, aiming at different times during the day under the sea lighting situation, puts forward a visual processing and multi-step sea boundary identification method. After the image is processed by using two peak method normalized Canny boundary scan and other methods, the vertical and horizontal scanning and boundary recognition are carried out to obtain the closed Marine garbage main body area. Finally, Zigzag algorithm is used to carry out recovery path planning in the scanned area, and the results under different search radii are compared and analysed. The experimental results show that this method is applicable to a wide range of applications and has high accuracy and practicability, and the recognition results are satisfactory.
Study on Ultraviolet Photodetector modified by Au Nanoparticles on ZnO Nanowires
Authors: Fei Xiaomiao , Jiang Dayong , Wang Nan , Zhao Hongping , Xing Meijiao , Li Haoda 
Published: May 2021

Abstract
Zinc oxide (ZnO) is a direct wideband gap semiconductor material with a band gap of 3.37eV at room temperature. It can absorb ultraviolet light with a wavelength shorter than 385nm and is light blind to visible light. Using different growth methods or different growth conditions, the final prepared ZnO nanomaterials have different growth structures, which can be presented as nano dots, nanowires, nanoribbons, nano rings, nano tubes and other structures. In this paper, the ultraviolet (UV) photodetector (PD) of ZnO nanowires (NWs) was first prepared by wet etching and hydrothermal method. Then, gold (Au) nanoparticles (NPs) was used as metal nanoparticles with surface modification to characterize the performance of the PD, and the study of NPs modification on the performance of the detector was explored. After testing, the NPs modification improved the responsivity by about 12 times and the absorption was also improved to a certain extent. This paper provides a valuable reference for the material selection of UV PDs based on ZnO NWs surface modification.
Tunable Ultra-Broadband Terahertz Waveband Absorbers Based on Hybrid Gold-Graphene Metasurface
Authors: Xie Tong , Chen Dingbo , Xu Yanhong , Zhang Zhenrong , Yang Junbo 
Published: May 2021

Abstract
In this paper, we propose a tunable ultra-broadband terahertz absorber based on hybrid gold-graphene resonator to achieve an ultra-broadband, ultra-thin, and tunable metasurface, which has not only the high absorption rate of gold metamaterials but also the tunable properties of graphene metamaterials, compared with the traditional single gold-based and graphene-based methods. By simulating the response frequencies by the finite element method, we found that the absorber achieves a broadband 2.68-7.48 THz range (absorption>80%) absorbance with a relative bandwidth of 94.5%, where the center frequency is f
c=5.08THz. The physical mechanism of the absorber was analyzed using the electric field of the surface plasmon resonance, due to the design structure presents periodic geometric symmetry, the polarization angle and large angle incidence both present better advantages. The dynamic tuning of the metamaterial absorber is achieved by changing the Fermi energy level of graphene by adjusting the bias voltage to effectively control the metamaterial absorption intensity and resonant frequency. Our proposed absorber has important application prospects in sensing, optical communication, detection, and optical devices.
An algorithm for generating flame image data sets based on GAN
Authors: Qin Kui , Bu Leping , Zhou Yang , Yan Zhengjun , Wang Can , Wang Teng 
Published: May 2021

Abstract
In order to solve the problem of insufficient flame image data, this paper designs a flame image data sets generation algorithm based on generative adversarial network and studies the influence of different generator depth and training times on the flame generation effect. The effect of generative flame under different conditions was quantitatively evaluated by two indexes of Inception score and PSNR. The simulation results show that when the generator is 9 layers and training is 80 times, the Inception score is 2.06 and PSNR is 13.18. The effect of generative flame image is better at this time. Therefore, this generative adversarial network model can better realize the purpose of generating the flame image data sets.
Research on Fatigue Phenomenon and Internal Mechanism of HfZrO2 Ferroelectric Thin Film Memory
Authors: Liu Jie , Zhu Hui , Li Rui , Wang Si , Zhang Zhirang , Xie Na , Huang Zeng 
Published: May 2021

Abstract
The fatigue effect of the HfZrO2 thin film sample plays a vital role in its application in the semiconductor field. This article explores the fatigue mechanism inside the thin film sample by studying the effect of various experimental conditions on the ferroelectric properties of the sample, and analyzes the experimental results. Then we study the experimental results to clarify the changes in the micro-physical mechanism inside the sample.Combined with macro-theory and micro-examination, we observe that experimental conditions such as the pulse width of the applied pulse will affect the change of the sample’s remnant polarization values during the fatigue cycle. Finally, we try to optimize these conditions to achieve stable remanent polarization. This paper further clarifies the fatigue mechanism of the sample through the mathematical analysis of experimental data and the comparison of existing theories, and points out the direction for optimizing the application of the device.