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The 246 nm AlN-delta-GaN quantum well ultraviolet light-emitting diode was proposed and realized experimentally, with the dominant transverse electric-polarized emission been verified by both the k·p simulation and the room-temperature polarization-dependent electroluminescence measurements.
A novel algorithm for on-line triple-wave measurements based on phase modulation and coherent iterative engine with single diffraction pattern. It could be a potential technique for pulse laser diagnostic in high power laser systems.
A new laser facility with 30kJ/ns/3ω(8 beams) output energy has begun operation with good performance. Another single laser prototype pushes 1ω output energy to 17.5kJ/21ns in 350mm×350mm aperture with four-pass main amplifier architecture.
For long-distance transmissions, relay-aided transmission technique is a promising solution to improve the performance for the free-space optical (FSO) communications. In this paper, a serial decode-and-forward relay-aided FSO communication system is considered. In the system, the main noise is Gaussian noise, however, with a noise variance depending on the current signal strength. Moreover, a composite...
Recently, the physical-layer security, which exploits the channel characteristics in order to hide information from unauthorized receivers and does not reliance on the upper-layer encryption, has been proposed as a promising complement to the traditional security schemes. In this paper, the lower bounds on secrecy capacity for indoor visible light communications (VLC) are investigated. The noise is...
Malignant tumors appear to own the ability to recruit normal tissue cells that contribute to the tumorigenesis process by creating the “tumor microenvironment”. MMPs, is one of the most significant family of proteinases that are related to tumor microenvironment. Recent understanding of MMPs has recognized its role as modulators in tumor microenvironment; however, the current strategies for in vivo...
Generating photo-realistic images from multiple style sketches is one of challenging tasks in image synthesis with important applications such as facial composite for suspects. While machine learning techniques have been applied for solving this problem, the requirement of collecting sketch and face photo image pairs would limit the use of the learned model for rendering sketches of different styles...
Shenyang was a representative heavily polluted industrial city in northeast China. Two types of urban area with significant spatial position difference were divided by arterial traffic as the surrounding and the core urban area. To reduce the impact of disturbing factors such as firecrackers in the traditional Chinese festivals, the observation period of the monitoring data was selected from November...
We investigate the temperature dependence of CrossTalk (CT) for PANDA Polarization maintaining fiber (PMF). The test temperature ranges from −55 to 85 °C, and the tested fiber was loose wound. The mismatch in thermal expansion coefficient between the boron-doped parts and the core can be varied by controlling the doping concentration in the stress and core regions. The whole temperature CT variation...
In this paper, a robust consensus tracking controller for multiple marine vessels based on dynamic surface control (DSC) and neural network (NN) is proposed. The communication topology, which is often limited due to the topography and external disturbances, is of significance for coordination of the multiple marine vessels. The influence of communication topologies, which is neglected in many control...
This paper presents the pilot-induced oscillation (PIO) problem in the airdrop stage, analyzes the main causes of the PIO in the drop stage, establishes the closed-loop system with the actuator rate limit, and deduces the PIO formula of closed loop system. Based on the synchronization and Neal-Smith pilot model and the different actuator saturation values, the descriptive function method and the GAP...
Albacore tuna (Thunnus alalunga) is one of the important commercial species of the longline fishery in the southern Indian Ocean (SIO). The satellite-based oceanographic data of net primary production (NPP), sea-surface temperature (SST), sea surface salinity (SSS), mixed layer depth (MLD), sea-surface height (SSH) and eddy kinetic energy (EKE), were used to evaluate the effects of oceanographic conditions...
In Global Navigation Satellite System Radio Occultation (GRO), the tropospheric temperature and humidity can only be retrieved separately from refractivity by co-using a priori humidity or temperature information. Fortunately, the LEO-LEO (Low Earth Orbit) microwave occultation (LMO) exploits both the refraction and absorption of signals to solve the temperature-humidity ambiguity, and so it can retrieve...
GOPA is a radiation hardened GNSS baseband ASIC produced on the 65 nm 7-layer metal process technology. GOPA is capable of processing signals from GPS and BDS. A lot of lab tests had been carried out after tape-out of GOPA. The experiment results showed that the performances of GOPA were in good agreement with the design goals, the TID, SEL and SEU of the ASIC fulfilled the design requirements. GOPA...
Global Navigation Satellite System (GNSS) Occultation Sounder (GNOS) instruments were designed for the FengYun-3 (FY-3) series of meteorological satellites for sounding the Earth's atmosphere and ionosphere by radio occultation. Meanwhile, another GNSS remote sensing technique named GNSS reflectometry (GNSS-R) has been developed rapidly as well. To integrate these two GNSS remote sensing techniques...
This paper proposes an event-triggered course-tracking control approach of marine surface vessels based on output reference tracking method. Throughout this work, a reference system, which consists in the continuously controlled version of the system understudy, is employed. Based on the difference between the state of the event-triggered system and that of the reference system, a Lyapunov-like function...
The global high pixel density display ran into the consumer's life since 2012, almost all TV factory and company recommend 4K TV currently. For these reasons, it is the inexorable that the pixel density will be higher and higher, such as 8K even 16K type high pixel density display will appear. However, it is very serious technologic challenge for panel factory, so 8K or 16K type high pixel density...
The convolutional neural network (CNN) is more and more popular in computer vision and widely used in acoustic signal processing, image classification, and image segmentation. In this work, an architecture which is a combination of the 3-D convolutional neural network and the long short term memory (LSTM) was proposed for action recognition. It stacks the consecutive video frames, extracts spatial...
In traditional Quad Flat Package(QFP), solder joint quality and electrical analysis always been a critical issue. In original PCB land pad design, thermal opening is the same size of QFP thermal pad. In this design, solder joint yield is about 87.5%. In order to overcome this problem, this paper proposes a new PCB land pad design as a solution. Let PCB thermal opening 25% of QFP thermal pad size....
A monocular visual odometry using straight-line constrained optical flow was proposed to estimate the robotic ego-motion. The straight-line constrained optical flow was defined by decomposing the motion of a line segment in image plane into a rotation and two directional translations. The parameters of optical flow are similar to robot motion, so we can estimate the motion by combining the camera...
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