A5019481197- Inertial Sensor and Navigation
- Context-Aware Activity Recognition Systems
- Target Tracking and Data Fusion in Sensor Networks
- Indoor and Outdoor Localization Technologies
- Gait Recognition and Analysis
- Hand Gesture Recognition Systems
- Non-Invasive Vital Sign Monitoring
- Perovskite Materials and Applications
- Video Surveillance and Tracking Methods
- Organic Light-Emitting Diodes Research
- Astronomical Observations and Instrumentation
- Quantum Dots Synthesis And Properties
- Traffic Prediction and Management Techniques
- Advanced Vision and Imaging
- Balance, Gait, and Falls Prevention
- Robotics and Sensor-Based Localization
- Geophysics and Gravity Measurements
- Sensor Technology and Measurement Systems
- Geophysics and Sensor Technology
- Anomaly Detection Techniques and Applications
- Advanced Sensor and Control Systems
- Image and Video Stabilization
- Nanofabrication and Lithography Techniques
- GNSS positioning and interference
- Robotics and Automated Systems
Peking University
2015-2024
University of Science and Technology of China
2023-2024
South China Normal University
2023
Soochow University
2021-2022
King University
2021
Shenyang Institute of Automation
2021
University of Hong Kong
2021
City University of Hong Kong
2021
Nankai University
2021
Chiba Institute of Technology
2021
Abstract Presynthesized perovskite quantum dots are very promising for making films with different compositions, as they decouple crystallization and film-formation processes. However, fabricating large-area uniform using is still challenging due to the complex fluidic dynamics of solvents. Here, we report a robust approach an environmental-friendly binary-solvent strategy. Nonbenzene solvents, n-octane n-hexane, mixed manipulate evaporation dot inks, resulting in balanced Marangoni flow,...
<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> This paper introduces a mobile human airbag system designed for fall protection the elderly. A Micro Inertial Measurement Unit (<formula formulatype="inline"> <tex Notation="TeX">$\mu$</tex></formula>IMU) of 56 mm<formula Notation="TeX">$\,\times\,$</tex></formula>23 Notation="TeX">$\,\times\,$</tex></formula>15 mm in size is built. unit consists three dimensional MEMS accelerometers, gyroscopes,...
Abstract Metal halide perovskite light‐emitting diodes (PeLEDs) are attracting increasing attention due to their potential applications in flat panel lighting and displays. The solution process, large‐area fabrication, flexibility attractive properties of PeLEDs over traditional inorganic LEDs. However, it is still very challenging deposit uniform films on flexible substrates using a blade or slot‐die coating, as the substrate not perfectly flat. Here, inkjet printing technique adopted, key...
The development of new polymer-based room-temperature phosphorescence materials is great significance. By a special molecule design and set feasible property-enhancing strategies, coumarin derivatives (CMDs, Ma-Mf) were doped into polyvinyl alcohol (PVA), polyacrylamide (PAM), corn starch, polyacrylonitrile (PAN) as information anti-counterfeiting. CMDs-doped PVA starch films showed long-lived emissions up to 1246 ms (Ma-PVA) 697 (Ma-corn starch), reaching over 10 s afterglow under naked eye...
Abstract In recent years, the field of metal-halide perovskite emitters has rapidly emerged as a new community in solid-state lighting. Their exceptional optoelectronic properties have contributed to rapid rise external quantum efficiencies (EQEs) light-emitting diodes (PeLEDs) from <1% (in 2014) over 30% 2023) across wide range wavelengths. However, several challenges still hinder their commercialization, including relatively low EQEs blue/white devices, limited large-area poor device...
A novel technique for bonding polymer substrates using PDMS-interface is presented in this paper. This holds promise achieving precise, well-controlled, low temperature of microfluidic channels. thin (10–25 µm) poly(dimethylsiloxane) (PDMS) intermediate layer was used to bond two poly(methyl methacrylate) (PMMA) without distorting them. Microchannel patterns were compressed on a PMMA substrate by hot embossing first. Then, PDMS spin-coated onto another bare and cured stages. In the first...
Lead‐halide perovskite quantum dots (QDs) have attracted substantial attention due to their great potential in solution‐processed optoelectronic applications. The current synthetic method mostly relies on the binary‐precursor strategy, which significantly restricts reaction yield and elemental regulation, leading extremely high material cost. Herein, a more versatile ternary‐precursor investigate effect of precursor ratios production, surface chemistry, photovoltaic performance CsPbI 3 QDs...
In this paper, we present a new scheme for implementing virtual keyboards, which uses only two to four motion-recognition rings per hand and two-dimensional keyboard template (e.g., an A4 size paper with printed key positions). It has the benefit of portability, customizability, low-cost when compared existing approaches. Essentially, have shown that wearing wireless IoT on middle phalanges fingers each hand, users can input alphabetic characters into computing device by typing flat desk,...
This paper presents a novel method of estimating the altitude pedestrians who are walking in indoor environment multi-story building. We will show that to achieve pedestrian estimation, only needs wear small MEMS-based integrated sensing device consisting micro-IMU (i.e., consists 3D accelerometer, gyroscope, and magnetometer) barometer, during activities. High-precision estimates pedestrian's position vertical direction were obtained by utilizing acceleration angular rate data, as well...
This paper presents a new method of human motion recognition based on MEMS inertial sensors data. A Micro Inertial Measurement Unit (μIMU) that is 56mm*23mm*15mm in size was built. unit consists three dimensional accelerometers, gyroscopes, Bluetooth module and MCU (Micro Controller Unit), which can record transfer data to computer through serial port wirelessly. Five categories were done including walking, running, going upstairs, fall standing. Fourier analysis used extract the feature...
For an intelligent transportation system (ITS), traffic incident detection is one of the most important issues, especially for urban area which full signaled intersections. In this paper, we propose a novel method based on image signal processing and hidden Markov model (HMM) classifier. First, surveillance was set up at typical intersection China, videos were recorded sequences extracted database forming. Second, compressed features generated through several steps, difference with FFT used...
Nowadays, location-based services (LBS) has become widely used in our daily life. The most famous system is global positioning (GPS), which limited to outdoor applications and provide poor locating accuracy. In this paper, we present a systems based on inertial MEMS sensor includes three-axis accelerometer, gyroscope magnetometer. can help people get accurate for indoor environments, also available outdoors, because of its self-contained character. It foot wearable device with wireless...
Supervised learning for Unmanned Aerial Vehicle (UAVs) visual-based navigation raises the need reliable datasets with multi-task labels (e.g., classification and regression labels). However, current public have limitations: (a) Outdoor limited generalization capability when being used to train indoor models; (b) The range of labels, especially tasks, are in different units which require additional transformation. In this paper, we present a Hull Drone Indoor Navigation (HDIN) dataset improve...
A MAG-muIMU which is based on MEMS accelerometers, gyroscopes and magnetometers has been developed for real-time estimation of human hand motions. Appropriate filtering, transformation sensor fusion techniques are combined in the ubiquitous digital writing instrument (UDWI) to record handwriting any surface. However, because sensors' intrinsic biases random noise such as circuit thermal noise, a calibration system that provides good reference measurement parameters must be used compare...
This paper presents the development and analysis of inertial MEMS sensor based system that can detect falls in real time. The is a major part mobile human airbag which prevents elderly from fall induced fractures. detection hardware was designed, could monitor motions feet waist Micro Inertial Measurement Units (μ IMUs) applied this with Zigbee network algorithm what constituted three sub algorithms also developed. designed on data analysis, order to select optimal parts for monitoring...
This paper describes the development of a human airbag system which is designed to reduce impact force from falls. A micro inertial measurement unit (muIMU), based on MEMS accelerometers and gyro sensors developed as motion sensing part system. recognition algorithm used for real-time fall determination. With algorithm, microcontroller integrated with muIMU can discriminate falling-down normal motions trigger an when occurs. Our have fast response moderate input pressure, i.e., experimental...
A micro inertial measurement unit (muIMU) which is based on MEMS accelerometers and gyro sensors developed for real-time recognition of human hand motions, when combined with appropriate filtering transformation algorithms, becomes a digital writing system that can be used to record handwriting any surface. The overall size our muIMU less than 25 mm times 70 20 mm, including the sensors, processor, wireless interface components. We present progress using this Kalman algorithm filter noise...
A MAG-muIMU which is based on MEMS gyroscopes, accelerometers, and magnetometers developed for real-time estimation of human hand motions. Appropriate filtering, transformation sensor fusion techniques are combined in the ubiquitous digital writing instrument to record handwriting any surface. In this paper, we discuss design an extended Kalman filter (micro inertial measurement unit with magnetometers) attitude tracking. The utilizes gyroscope propagation transient updates correction by...
This paper proposes a position and attitude observer based on INS GPS. Design test results of an adaptive dual-rate Extended Kalman Filter(EKF) estimator for fusing data from Global Positioning Systems (GPS) Inertial Navigation System (INS) in order to estimate the position, velocity, attitude. The EKF consists high-speed filter low-speed filter, fuses Real-Time Kinematic (RTK) GPS INS, pseudorange INS. solution designed isolate noise realize complementary real-time performance high...
Plasmonic nanocavities, with the ability to localize and concentrate light into nanometer-scale dimensions, have been widely used for ultrasensitive spectroscopy, biosensing, photodetection. However, as nanocavity gap approaches subnanometer length scale, plasmonic enhancement, together enhanced optical processes, turns quenching because of quantum mechanical effects. Here, instead quenching, we show that effects nanocavities can elevate surface-enhanced infrared absorption (SEIRA) molecular...
In this paper, we present a new method to calibrate the misalignment error and zero offset of MEMS accelerometer, which applies Genetic Algorithm (GA) process measured data get model parameters. This can effectively eliminate caused by assembly deviation between sensitive sensor unit package shell. Results show that calibrated output is far more accurate than raw obtained only used factory calibration. The mean squared (MSE) before calibration 1.754×10 <sup...