MIMO SAR Using Orthogonal Coding: Design, Performance Analysis, and Verifications by Yueguan Lin, Yida Fan, Chenglong Jiang, Zhiqiang Wang, Weizeng Shao

“…This paper studies the principle of MIMO SAR using orthogonal coding waveform and then provides the performance analysis in resolution and swath width. …”
Get full text

The strength of confidence is involved in controlling the intensity of attentional allocation by Kazuki Yoshida, Ryuji Saito

“…Additionally, we observed lower frontoparietal P3a potentials (component of the ERP waveform associated with attention) in the high-confidence condition. …”
Get full text

Blind despreading and deconvolution of asynchronous multiuser direct sequence spread spectrum signals under multipath channels by Liangliang Li, Huaguo Zhang, Songmao Du, Tao Liang, Lin Gao

“…Abstract In non‐cooperative scenarios, the spreading sequences or waveforms of the direct sequence spread spectrum (DSSS) signals is unknown to the receiver. …”
Get full text

A Novel Stick-Slip Type Rotary Piezoelectric Actuator by Yuan Wang, Minglong Xu, Shubao Shao, Siyang Song, Yan Shao

“…Experimental results show that the minimal output stepping angle is 3.5 μrad (0.2 millidegrees) under a sawtooth waveform having a voltage of 13 V and frequency of 3000 Hz and that the velocity reaches 0.44 rad/s (25°/s) under a sawtooth waveform having a voltage of 93 V and frequency of 3000 Hz, while the stroke is infinite. …”
Get full text

Suppression of Thrust Fluctuation of a New Ironless Tubular Permanent Magnet Synchronous Linear Motor Based on the Halbach Array by Bo Li, Jun-an Zhang, Zhiping Shi, Xiaolong Zhao, Hao Dong

“…The distortion of its waveform causes thrust fluctuation during the operation of the motor, resulting in poor machining accuracy of the machine tool. …”
Get full text

Wave Attenuation and Dispersion in a 6 mm Diameter Viscoelastic Split Hopkinson Pressure Bar and Its Correction Method by Haotian Zhang, Linjian Ma, Zongmu Luo, Ning Zhang

“…With an increase in the impact velocity, the amplitude attenuation of the viscoelastic wave changes slightly during propagation, while the waveform dispersion gradually intensifies. A feasible method by waveform prediction was proposed to verify the validity and applicability of the propagation coefficient. …”
Get full text

Ionospheric Disturbances Generated by the 2015 Calbuco Eruption: Comparison of GITM‐R Simulations and GNSS Observations by J. Tyska, Y. Deng, S. Zhang, C. Y. Lin

“…Abstract Volcanic eruptions provide broad spectral forcing to the atmosphere and understanding the primary mechanisms that are relevant to explain the variety in waveform characteristics in the Ionosphere‐Thermosphere (IT) is still an important open question for the community. …”
Get full text

Mitigation of Harmonics and Unbalanced Voltage Disturbance Compensation by MSVPWM Based- DVR in the Distribution Net by Haider Muhamad Husen

“…Pre-disturbance voltage compensation strategy and phase-locked-loop (PLL) based dq- space vector control are presented to improve a Dynamic Voltage Restorer (DVR), which restore the magnitude of voltage disturbance and displacement of phase angle to prior of voltage disturbance. 3-phase Multilevel strategy of Space Vector Pulse Width Modulation (MSVPWM) based- Multilevel Diode Clamped Converter (MDCC) is proposed as switching pulse signals employed low frequency, which creates high levels of voltage and fewer harmonics in the output waveform in comparison to 2-level SVPWM based- DVR. 3-level SVPWM based- DVR under balanced and imbalanced distortion voltage disturbances included sags and swells injected appreciated quantities of voltage, thereby attained ideal sinusoidal waveform with lower Total Harmonic Distortion THD% compared to 2-level SVPWM based- DVR. …”
Get full text

Combined Color-Doppler Flow and Angio Planewave UltraSensitive™ Imaging for Analysis of Hemodynamic Characteristics of Normal Upper Limb Arteries by Yanzhou Liu, Xiyue Zhang, Hang Yang, Xueyan Tan, Duo Huang, Hongmei Yuan, Lili Yu, Fang Yang, Yuan Zou, Xiuli He, Yuqun Luo, Fangzhao Cui, Ping Wang, Zukun Li, Qing Zhang, Ning Zhang, Binglei Jiang, Wensheng Yue

“…When the blood-flow spectrum of BA and RA showed a monophasic waveform, their branch arteries showed the same. The waveforms of PPDA and FN3AA were also monophasic. …”
Get full text

Exploration of pulse wave analysis under reactive hyperemia and close to an arteriovenous fistula: a comparative analysis by Veit Busch, Sandra Müller, Joachim Streis, Timm H. Westhoff, Thomas Felderhoff, Felix S. Seibert, Stefan Reuter, Niklas Mueller

“…Both high flow conditions induced similar changes in the pulse waveform and a delay of the systolic peak in all three collectives. …”
Get full text

Characteristics of Flow Field around Double Rectangular Piersin Tandem Based on RNG k-ε Turbulence Model by DING Anna

“…Double rectangular piers in tandem have been widely used in bridge engineering,and the distance between the two piers has a significant impact on the characteristics of the flow field around them.This paper utilized the Fluent software to simulate the unsteady instantaneous flow field around a single rectangular pier and double rectangular piers in tandem by using the RNG k-ε turbulence model.The distribution characteristics of the flow field around the double rectangular piers in tandem at different distances (L/W=2,4,6) between the two piers were studied from the aspects of vorticity,streamline,pressure and transverse velocity.The results show that compared with that of the single rectangular pier,the fluid flow around the double rectangular piers in tandem is more complex and has wider lateral distributions of wake vortex and streamline bending zone.The generation,separation and reattachment of the shear layer of the two piers are affected by pier spacing.When L/W≥4,vortices are generated and fall off in the wake at the upstream pier.In such a case,the streamline bending zone,pressure increase zone and pressure decrease zone are formed between the two piers,and multiple pressure decrease zones are formed in the wake at the downstream pier.The transverse velocity of wakes at rectangular piers fluctuates between positive and negative.Compared with the single and symmetrical velocity waveform of the single pier,the transverse velocity waveform of the double rectangular piers is no longer symmetrically distributed.The peak transverse velocity between the two piers decreases with the increase in pier spacing,and the fluctuating peak values on both sides of the two piers are higher than those of the single pier.The fluctuating peak values are lower at a farther distance from the pier centerline.The research results can provide a reference for pier layout in bridge engineering.…”
Get full text

Machine learning based quantitative pain assessment for the perioperative period by Gayeon Ryu, Jae Moon Choi, Hyeon Seok Seok, Jaehyung Lee, Eun-Kyung Lee, Hangsik Shin, Byung-Moon Choi

“…Key features from the photoplethysmography waveform were extracted to build XGBoost-based models for intraoperative and postoperative pain assessment. …”
Get full text

The Effect of Varied Time Interval and Micro-Current (Direct) on the Level of Biomarker (IL-6) and Rate of Tooth Movement: An Animal Study by Parnita Dwivedi, Ashish Agrawal, Subash Chandra Gupta, Tehmin Chou

“…A qualitative examination of DC (waveform and frequency) provides ideal qualities of current. …”
Get full text

Microseismic Response Characteristics Induced by Mining Activities: A Case Study by Xuesong Bai, Zhi Tang, Tao Zhao, Xiaoyang Cheng, Kai Chen

“…Studies have shown that there are large differences in the waveform and spectral characteristics of MS signals at different energy levels. …”
Get full text

Research of the Multi Parameter Edge of Chaos of Non- linear Simple Pendulum System by He Shanghong, Xie Jin, Cheng Jiefeng, Cui Qingyu

“…The results are verified by the other methods of analysis chaos,such as bifurcation diagram,phase diagram,time domain waveform,and maximum Lyapunov exponent. It is demonstrated that,by using the obtained results can provide a convenient means to design a nonlinear simple pendulum with periodic motion.…”
Get full text

A Novel Approach to Cognitive Load Measurement in N-Back Tasks Using Wearable Sensors, Empirical Mode Decomposition With Machine Learning, and Explainable AI for Feature Importance by Aakanksha Dayal, Ziaullah Khan, Kiramat Ullah, Hee-Cheol Kim

“…SHAP analysis identified key features contributing to this performance, revealing key features such as the waveform length of the first Intrinsic Mode Function (IMF) for the ECG signal, the mean of the second IMF for fingertip-PPG, and the waveform length of the second IMF for combined ECG and fingertip-PPG signals. …”
Get full text

Time-Frequency Characteristics and the Influence Mechanism of the EMR from Coal with Different Joint Angles by Hongwei Mu, Dazhao Song, Shan Yin, Xueqiu He, Liming Qiu, Dongfang Su, Yang Liu

“…The duration of the EMR waveform, the dominant frequency of the EMR, and the peak number of the frequency spectrum of coal samples are on the rise. (2) As the joint angle increases, the samples’ failure mode changes from the stage fracture dominated by tension cracks to the rapid fracture with the coexistence of shear and tension cracks and finally to the burst fracture which produces a large number of fragments. …”
Get full text

Using all-phase Fourier method to reconstruct discontinuous signal by HUANG Xiang-dong, WANG Zhao-hua, LI Wen-yuan

“…Theoretical deduction and experimental research show that the waveform reconstructed by all-phase Fourier method has less error than those constructed by conventional continuous Fourier integral approximation and the discrete Fourier reconstruction.…”
Get full text

Improved pulse shaping for PAPR reduction of OFDM signal by Zhuo-ming FENG, Wei-zhong LIU, Xiong-fei TAO, Bai-yun LUO

“…An improved Nyquist pulse was presented.The proposed pulse waveform can significantly reduce the PAPR and keep the system BER invariant at the same time,but at the expense of a little spectrum loss.Simulation results show that the proposed shaping pulse can get better performance of PAPR compared to traditional raised cosine pulse and flipped-exponential pulse.It is an effective method with low complexity to reduced the PAPR of OFDM signal by pulse shapping with the proposed nyquist pulse.…”
Get full text

Analysis and avoidance method of 5G atmospheric duct interference by Tinglan WANG, Xingzheng LI, Yimin ZUO, Dongchen ZHANG

“…Atmospheric duct effects can produce the remote interference, which will lead to serious problems of the network degradation.Firstly, a detailed analysis of the causes of 5G atmospheric duct interference was achieved through the system principle analysis.Then, a 5G atmospheric duct interference waveform identification algorithm was proposed.Finally, from the aspects of time domain, frequency, air domain, parameter configuration, etc., the avoidance and adjustment method of atmospheric duct interfered cells was proposed.The impact of the atmospheric duct interference is reduced and the quality of 5G networks is ensures.…”
Get full text