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We demonstrate high quantum yield broad photoluminescence emission of ultrathin sub-nanometer CdSe nanoplatelets (two-monolayer). They also exhibit polarization-characterized lateral size dependent anomalous heavy hole and light/split-off hole absorption intensities.
For the purpose of saving energy, aiming at improving the weakness of traditional lighting system, such as wasting energy and poor flexibility, this paper designs an intelligent home lighting control system with STM32 as the control core and Wi-Fi and ZigBee as the communication mode. The system, through the three-way pulse width modulation(PWM) to achieve the tricolor LED light intensity and color...
The utilization of millimeter wave (mmWave) frequency has shown great potential in developing the next-generation wireless systems. Conventional fully digital precoding which needs one radio frequency (RF) chain per antenna is impractical in large-scale mmWave systems because of the high hardware complexity, power consumption and cost. In this paper, we propose a scheme with hybrid precoding at the...
Hybrid precoding design for adaptive sub-connected arrays offers a compromise between hardware complexity and spectral efficiency in massive multiple-input multiple-output (MIMO) systems at millimeter wave (mmWave) frequencies. This paper focuses on the impacts of the partially antenna connections on the achievable sum-rate performance in mmWave networks. The subarray architectures consist of the...
In this paper, we propose a wireless battery charging system which the power transfer position can be automatically moved to the optimal charging placement. The proposed charging system is based on the electromagnetic inductive power transfer technique which is a short distance power transfer system. As a result, we have successfully finished the implementation of the proposed wireless battery charging...
Spot network, as a special low voltage secondary network, has very high supply reliability and it is beneficial for integrating Distributed Energy Resources (DERs). In the conventional spot network, all the feeders are the sole power source and provide unidirectional power to the secondary network. The equipped network protector prevents the power flow from the network to the feeder, in order to protect...
This paper proposes an in-vehicle power line communication (PLC) system which provides an in-vehicle communication for the video and vehicle messages transmission as a reliable alternative networking medium. The proposed in-vehicle PLC system adopts an existing in-vehicle 12-V battery power system, which means we don't need an external DC power supply for in-vehicle communication equipment to achieve...
The electromagnetic compatibility (EMC) margin is an important technical index of spacecraft system. In according to the test principle of margin and actual operation case of spacecraft, the paper propose feasible test methods of EMC margin for spacecraft.
This paper gives an overview on system architecture and function of electromagnetic interference on-site detection system. A special RF filter bank was designed to protect the system, and radio monitoring technology is used to locate the source of the on-site electromagnetic interference, and help improve the safety features of satellite system more actively.
The recent development of ultrafast ultrasound localization microscopy (Errico et al., Nature, 2015) provides new opportunities for imaging the vasculature with sub-diffraction resolution. However, the large number of images to be recorded requires acquisitions lasting several minutes. Therefore, physiological motion far larger than the achievable resolution presents challenges for moving tissues...
Angelman syndrome (AS) is a rare neuro-genetic disorder caused by loss of expression of the maternal copy of UBE3A in the brain inducing severe mental and physical impairments. Due to brain-specific genetic imprinting, the paternal UBE3A is silenced by a long antisense transcript. Inhibition of the antisense transcript could lead to unsilencing of paternal UBE3A, thus providing a therapeutic approach...
Human studies aimed at opening the blood brain barrier (BBB) to deliver therapeutic agents through a combination of focused ultrasound (US) and microbubbles (MB) are currently underway [1]. Our goal was to develop an US-guided BBB opening system capable of steering the US beam throughout the rodent brain and registering the coordinates with high field MRI. Our ultimate goal is to deliver therapy for...
A robust method of pointer meter reading recognition was proposed for the inspection robot in intelligent substation. The new method consists of two stages. Stage 1: all scale lines in a template image were marked artificially and all centroids of scale lines were figured out. A least-square method with random sample consensus (RANSAC) was used to fit the meter circle using the centroids of all scale...
The standard measurement method for soft magnetic materials can not measure the magnetic parameters in deep saturation. Using the measurement equipment for hard magnetic materials, which has strong excitation ability, the parameters in deep saturation can be measured, whereas the measurement error is very large. Based on the analysis of the error sources, this paper proposed a method to improve the...
Inrush current caused by residual flux is the main reason that makes transformers fail to be re-energized. The concept of calculating transformer residual flux by the integration of the port-voltage after de-energization was proposed previously. In this paper, the principle of the concept is analyzed using phasor method. The concrete implementation is put forward, including two methods of determining...
The edge filter approach using a distributed feedback laser diode is well suited for interrogating Fiber Bragg Grating micro-seismic sensors. This paper presents the design and implementation of a novel precision edge filter interrogation system based on digital signal processing technology. The experimental study of the temperature tuning characteristics, system composition, and operating principle...
Based on approximate least absolute deviation criterion and Newton's search principle, a full coupled identification algorithm is proposed for multivariable system whose model parameters are fully coupled. To solve the non-differentiable problem of the least absolute deviation, an approximate least absolute deviation objective function is established by introducing a deterministic differentiable function...
This paper investigates the problem of adaptive almost disturbance decoupling for a class of generalized high-order uncertain nonlinear systems. The control strategy is on the basis of continuous domination and delicate adaptive technique and the adaptive state-feedback controller is one-dimensional irrespective of the number of unknown parameters. An appropriate nonlinear function and transformation...
Steganographer detection problem is to identify culprit actors, who try to hide confidential information with steganography, among many innocent actors. This task has significant challenges, including various embedding steganographic algorithms and payloads, which are usually avoided in steganalysis under laboratory conditions. In this paper, we propose a novel steganographer detection model based...
Inverted Type-I quantum rings (QRs) are a recently developed class of nanostructure in which a lower bandgap material is laterally grown as a crown of same thickness around a higher bandgap nanoplatelet (NPL) core [l·2]· e.g. core/crown CdS/CdSe as shown in Fig. 1(a). For this work, we have colloidally synthesized 3 monolayer (ML) thick CdS/CdSe QR samples using seed-mediated method, by using 3ML...
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