A5020875574- Photonic and Optical Devices
- Advanced Fiber Optic Sensors
- Advanced Fiber Laser Technologies
- Superconducting and THz Device Technology
- Physics of Superconductivity and Magnetism
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Electric Vehicles and Infrastructure
- Gear and Bearing Dynamics Analysis
- Soil Carbon and Nitrogen Dynamics
- Quantum and electron transport phenomena
- Mechanical and Optical Resonators
- Environmental and Agricultural Sciences
- Magnetic and transport properties of perovskites and related materials
- Machine Fault Diagnosis Techniques
- Magneto-Optical Properties and Applications
- Neutrino Physics Research
- Soil and Water Nutrient Dynamics
- Electronic and Structural Properties of Oxides
- Forest, Soil, and Plant Ecology in China
- Advanced machining processes and optimization
- Radioactive Decay and Measurement Techniques
- Plant responses to water stress
- Stochastic Gradient Optimization Techniques
- Microgrid Control and Optimization
Argonne National Laboratory
2020-2024
Xinjiang University
2023-2024
Beijing Normal University
2024
Ministry of Ecology and Environment
2024
Hebei Agricultural University
2024
Shanxi Agricultural University
2020-2024
Guangzhou University
2014-2023
Nanjing University of Science and Technology
2022
Central South University
2022
Nanchang University
2021
Abstract The performance of superconducting qubits is degraded by a poorly characterized set energy sources breaking the Cooper pairs responsible for superconductivity, creating condition often called “quasiparticle poisoning”. Both and low threshold dark matter calorimeters have observed excess bursts quasiparticles or phonons that decrease in rate with time. Here, we show silicon crystal glued to its holder exhibits low-energy phonon events more than two orders magnitude larger...
A new record for high-finesse silica waveguide ring resonators (WRRs), to the best of our knowledge, is demonstrated experimentally. The achieved finesse and resonant depths WRR with a length 7.9 cm diameter 2.5 are 196.7% 98%, respectively. In addition, chip coupled single-polarization fiber improve polarization extinction ratio (PER) and, thus, reduce error. With application this high-PER micro-optic gyroscope (RMOG), bias stability 0.004°/s observed over 1 h timeframe. To first RMOG...
In this paper, the development and evaluation of passive optical ring resonator gyroscopes (OPRGs) are critical reviewed. Attention has been paid to countermeasures against parasitic noise sources which encountered in OPRG including backscattering, backreflection, polarization error, nonlinear Kerr effect, laser frequency noise. The new progress a feasible is shown. addition, advanced complex digital signal processing OPRGs also addressed.
It is well-known that the closed-loop operation in optical gyros offers wider dynamic range and better linearity. By adding a stair-like digital serrodyne wave to phase modulator can be used as frequency shifter. The width of one stair this should set equal transmission time resonator, which relaxed hybrid modulation (HDPM) scheme. physical mechanism for relaxation firstly indicated paper. Detailed theoretical experimental investigations are presented HDPM. Simulation results show not...
A novel hybrid integrated scheme is proposed for a high-performance resonant micro-optic gyro (RMOG), which requires low-loss micro-ring resonator mass production. new record the RMOG established experimentally with short fiber ring and an signal detecting processing circuit. The finesse of length 60 cm diameter 4.77 as high 202, theoretical sensitivity better than 0.3°/h assuming average optical intensity at photodetector 1 mW. long spliceless proved to be sufficient tactical-grade RMOG. An...
The diagnosis of bearing faults is a crucial aspect ensuring the optimal functioning mechanical equipment. However, in practice, use small samples and variable operating conditions may result suboptimal generalization performance, reduced accuracy, overfitting for these methods. To address this challenge, study proposes fault method based on symmetric two-stream convolutional neural network (CNN). employs hybrid signal processing techniques to issue limited data. parallel (CNN) analysis...
In recent years, many adversarial malware examples with different feature strategies, especially GAN and its variants, have been introduced to handle the security threats, e.g., evading detection of machine learning detectors. However, these solutions still suffer from problems complicated deployment or long running time. this paper, we propose an n-gram MalGAN method solve problems. We borrow idea Natural Language Processing (NLP) area expand sources for in MalGAN. Generally, obtains vector...
Amongst the rare-earth perovskite nickelates, LaNiO$_3$ (LNO) is an exception. While former have insulating and antiferromagnetic ground states, LNO remains metallic non-magnetic down to lowest temperatures. It believed that a strange metal, on verge of instability. Our work suggests quantum critical close point (QCP). The QCP behavior in manifested epitaxial thin films with unprecedented high purities. We find temperature magnetic field dependences resistivity at low temperatures are...
Integrated nutrient management is important for sustainable agricultural production and protecting environment quality has been widely investigated around the world. In this article spatial variability of soil nutrients was a regionalized system developed using geostatistics geographic information technologies. A total 511 GPS-referenced samples were taken in Yongji County, Shanxi province, China, analysed major nutrients: nitrogen (TN), Olsen extractable phosphorus (OLSENP) potassium...
In this paper, a novel optical waveguide-type ring resonator by inserting titled waveguide gratings (TWGs) with the Brewster's angle is proposed. Using Marcatili approximation, electric fields for rectangular obtained. Then, volume current method (VCM) first developed rectangular-core TWGs. By VCM, feasibility of TWGs to filter s-polarized light propagating in proved. When 4-cm-long 45°-titled TWG applied silica waveguide-ring resonator, polarization extinction ratio 40 dB The influences...
As one kind of the main optical error sources in resonant micro-optic gyro (RMOG), Kerr-effect brings a nonzero bias to output RMOG. The induced is proportional difference between clockwise (CW) and counterclockwise (CCW) light-intensities input resonator. A new method for testing RMOG proposed demonstrated. square-wave intensity-modulated signal with symmetrical duty ratio 50% achieved by an acousto-optic modulator (AOM), thus making input-intensity mismatch CW CCW lightwaves change...
The performance of superconducting qubits is degraded by a poorly characterized set energy sources breaking the Cooper pairs responsible for superconductivity, creating condition often called ``quasiparticle poisoning". Both and low threshold dark matter calorimeters have observed excess bursts quasiparticles or phonons that decrease in rate with time. Here, we show silicon crystal glued to its holder exhibits low-energy phonon events more than two orders magnitude larger functionally...
We present the conceptual design of modular detector and readout system for Cosmic Microwave Background – Stage four (CMB-S4) ground-based survey experiment. CMB-S4 will map cosmic microwave background (CMB) millimeter-wave sky to unprecedented sensitivity, using 500,000 superconducting detectors observing from Chile Antarctica over 60% sky. The fundamental building block is a module package operated at 100 mK, which connected amplification chain that carries signals out room temperature. It...
Mechanical anisotropy and point defects would greatly affect the product quality while producing silicon wafers via diamond-wire cutting. For three major orientations concerned in wafer production, their mechanical performances under nanoscale effects of a defect were systematically investigated through molecular dynamics methods. The results indicated anisotropic performance with fracture phenomena uniaxial deformation process monocrystalline silicon. Exponential reduction caused by has...
Rolling bearings serve as the fundamental components of rotating machinery. Failure to detect damage early in these can result equipment shutdown, leading not only economic losses but also a threat worker safety. Given diverse range parts, it is crucial promptly identify and accurately diagnose bearing failures during maintenance large-scale To achieve quick precise fault diagnosis, this study proposes method based on dilated convolution, Bidirectional Gated Recurrent Unit (BiGRU),...
<List> <ListItem> <ItemContent> ● Relationships between agricultural green development (AGD) and 10 UN SDGs are presented. </ItemContent> </ListItem> Historical changes characteristics of AGD in China analyzed. Knowledge gaps indicators identified. </List> While is highly recognized has become a national strategy China, it imperative to bridge the knowledge Sustainable Development Goals (SDGs), evaluate contribution meeting SDGs. The first aim this study was compare goals with those so as...
Gearbox fault diagnosis is essential in the maintenance and preventive repair of industrial systems. However, actual working environments, noise frequently interferes with signals, consequently reducing accuracy diagnosis. To effectively address this issue, paper incorporates attenuation DRSN-CW model. A compound detection method for gearboxes, integrated a cross-attention module, proposed to enhance performance noisy environments. First, frequency domain features are extracted from public...
A group of misaligned angles is proposed to describe the polarization characteristics fiber-pigtailed waveguide-type ring resonator (WRR). With these angles, a analysis model then set up using Jones matrix method. The output extinction ratios (PERs) WRR are obtained through measuring resonant curves under different input PERs. Though multiple numerical groups solutions for can be by substituting input-output PERs into model, we delighted find that do not affect WRR. Thus, PER pre-evaluated...
Abstract The delay time concept is widely adopted in literature to model the two‐stage failure process of most industrial systems which can be divided into normal stage (from new an initial point a defect) and defective defect arrival failure). Most existing models assume that stages are independent. A generalized proposed this paper by considering dependence between reflected fact they share same external shock process. According definition shot‐noise process, shocks will incur random...