A5084442648- Radio Frequency Integrated Circuit Design
- Advancements in PLL and VCO Technologies
- Particle physics theoretical and experimental studies
- Photonic and Optical Devices
- Analog and Mixed-Signal Circuit Design
- Silicon Carbide Semiconductor Technologies
- Semiconductor Lasers and Optical Devices
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Advancements in Semiconductor Devices and Circuit Design
- High-Energy Particle Collisions Research
- Electromagnetic Compatibility and Noise Suppression
- Additive Manufacturing Materials and Processes
- Semiconductor materials and devices
- Additive Manufacturing and 3D Printing Technologies
- Environmental and Agricultural Sciences
- Energy Harvesting in Wireless Networks
- High Entropy Alloys Studies
- Sensor Technology and Measurement Systems
- Microwave Engineering and Waveguides
- VLSI and Analog Circuit Testing
- Photoacoustic and Ultrasonic Imaging
- Semiconductor Quantum Structures and Devices
- Power Line Communications and Noise
- Atmospheric chemistry and aerosols
Beijing Forestry University
2023-2025
Nanjing University of Posts and Telecommunications
2014-2024
Shaanxi Yulin Energy Group
2024
Hebei Agricultural University
2013-2024
Farmland Irrigation Research Institute
2024
Beijing Jiaotong University
2024
Southeast University
2008-2023
Nanjing University of Science and Technology
2021-2023
Northeastern University
2021-2023
Shanghai Electric (China)
2022
By employing the linear increasing drift region width and high-k dielectric region, a novel variation of lateral (VLW) technique is proposed to even equipotential contour increase doping concentration, which maximize breakdown voltage reduce specific ON-resistance. The exceeds 600 Von VLW double-diffused metal-oxide-semiconductor (LDMOS) with 1-μm silicon-on-insulator layer, 3-μm buried oxide, 60-μm length. 3-D simulation indicates that device increases by 140%, while reduces ON-resistance...
The influence of the defocusing distance on melt pool morphology, defect, microstructure and mechanical properties laser powder bed fusion (L-PBF) high strength Al–Cu–Mg–Mn alloy was studied. It is found that because different energy distribution, has significant effects defects, L-PBF parts using same process parameters spot size. When in range −3.0 to 0 mm, specimens with cracks, fine grains keyhole or transition mode are obtained. positive no columnar conduction best obtained when 1.0 mm...
Ecosystem service value (ESV) is a significant indicator related to regional ecological well-being. Evaluating ESV premised on continuous time series land benefit data can provide an accurate reference for civilization construction and sustainable development. Taking Shijiazhuang, the capital city of Hebei Province as example, study analyzed use changes based from 2000 2020 introduced socio-economic adjustment factor biomass construct dynamic assessment model ecosystem value. The...
Abstract Summary: We describe an interesting approach to the fabrication of wettability gradients from hydrophobicity superhydrophobicity in low‐density polyethylene (LDPE) films by first forming high porosity surfaces and placing specimens onto linear temperature gradients. While polymer chosen for study is non‐polar, its microporous layer provides sufficient superhydrophobicity. Lateral gradient heating results partial melting correspondingly decreases thus decreasing hydrophobicity....
Trimethyltin chloride (TMT) is a classic neurotoxicant that can cause severe neurodegenerative diseases. Some signaling pathways involving cell death play pivotal roles in the central nervous system. In this study, role of Sonic Hedgehog (Shh) and PI3K/Akt TMT-induced apoptosis protective effect Lycium barbarum polysaccharides (LBP) on mouse neuro-2a (N2a) cells were investigated. Results showed TMT treatment significantly enhanced apoptosis, upregulated proapoptotic Bax, downregulated...
Based on a standard 0.18μm CMOS technology, novel four-stage fully-differential ring voltage-controlled oscillator (VCO) with high speed, low power and wide tuning range is proposed. The inductive shunt peaking technique active inductors employed to expand the bandwidth of delay cell, pair PMOS transistors gates connected ground added increase oscillation frequency improve linearity VCO. Simulation results show that, from supply voltage 1.8V, 4.9~5.9 GHz, phase noise -86.7dBc/Hz@1MHz, FOM...
This letter presents a phase-noise-centric design methodology of rotary traveling wave voltage controlled oscillator (RTW VCO). Based upon this methodology, 15 GHz multiphase RTW VCO is realized in standard 90 nm CMOS process. Particularly, shielded coplanar striplines are exploited to provide better shielding protection and higher characteristic impedance with comparable Q-factor than conventional coupled transmission lines. Measured results the proposed demonstrates frequency tuning range...
AbstractSAR image shadow is the geometric distortion caused by scene elevation and downs. Shadow contour of SAR contains local spatial characteristic target, use a target’s in synthetic aperture radar (SAR) imaging has garnered much attention for automated target recognition applications. Due to special mechanism, not as clear that optical image. Aiming at recognition, this paper presents an segmentation method based on Partial Differential De-noising Marker-controlled, then automatic can be...
This paper presents a low-pass filter (LPF) for an ultra-high frequency (UHF) radio identification (RFID) reader transmitter in standard SMIC 0.18 μm CMOS technology. The active-RC topology and Butterworth approximation function are employed mainly high linearity flatness respectively. Two cascaded fully-differential Tow-Thomas biquads chosen low sensitivity to process errors strong resistance the imperfection of involved two-stage operational amplifiers. Besides, LPF is programmable order...
A track fitting algorithm based on the Kalman filter method has been developed for BESIII of BEPCII. The effects multiple scattering and energy loss when charged particles go through detector, non-uniformity magnetic field (NUMF) wire sag, etc., have carefully handled. This works well performance satisfies physical requirements tested by simulation data.
The principle of the method for BESIII event start time determination and code construction are described. investigation influence noise, rejecting noise performance checking by Monte Carlo physics data sample also presented. preliminary results got from simulation presented, reconstruction efficiency J/ψ → anything events at level 0∼60% can achieve above 99%, error rate is below 1%.
Resolution of synthetic aperture radar (SAR) images is limited by imaging hardware. To improve SAR image resolution, interpolation needs to be carried out on a image. An algorithm with good effect incurs high computational cost and cannot used in real-time scenario. This paper applies Compute Unified Device Architecture (CUDA) speed up the piece-wise autoregressive model for acquiring high-quality images. A partial differential carry de-noising. After de-noising, divide based local window...
The impulse ground-penetrating radar (GPR) has a significant advantage than other systems, due to their high-resolution and simple system architecture. In this paper, novel low-cost compact ultrawideband (UWB) GPR is presented. steep edged narrow pulse generation in the transmitter solved with step recovery diodes (SRD). order simplify structure improve performance, UWB antenna employed which based on using of two smoothly shaped flares geometrical structure. Furthermore, receiver employs...
Abstract Laser powder bed fusion (LPBF) is an advanced manufacturing technology; however, inappropriate LPBF process parameters may cause printing defects in materials. In the present work, of Ti-6.5Al-3.5Mo-1.5Zr-0.3Si alloy was investigated by a two-step optimization approach. Subsequently, heat transfer and liquid flow behaviors during were simulated well-tested phenomenological model, defect formation mechanisms as-fabricated discussed. The optimized for detected as laser power changed...