The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
We report a highly efficient (η ∼ 450 % W−-1cm−-2) and broadband (phase matching bandwidth δλ ∼ 100nm) second harmonic generation in a 50μm long fiber-integrated LNOI waveguide. We demonstrate phase matching tunability by small adjustments of microfiber diameter.
Using thermal strain concept, we can tune the bandgap of bilayer MoS2 through the two different thermal expansion coefficients of sapphire. Also, we propose a simple model to explain and precisely predict the bandgap-shifted behavior.
Nano-ring light emitting diodes with different wall width shows that the effective bandgap can be tuned by reducing the strain. This research successful to make the devices with four colors emission on the same wafer.
An on-chip DC-DC converter for energy harvesting is proposed for a new battery-less solar cell tag applied to the Internet of Things (IoTs) devices. The main purpose of this design is to maximize the transfer efficiency and to stably provide a high enough supply voltage to the back-end loads. The overall circuit consists of a crosscoupled charge pump, a maximum power point tracking (MPPT) circuit,...
In this paper, we study the tradeoff of efficiency and delay of Slepian-Wolf distributed source coding (DSC). In the considered network, Machine-Type Communications (MTC) devices transmit correlated data to one base station, the data sources follow a multi-variate Gaussian distribution. To reduce the consumption of communication resources by massive MTC devices, Slepian-Wolf coding is adopted to eliminate...
The next generation cellular networks are predicted to face the challenge of massive data transmission originated from Machine Type Communication (MTC) devices with limited communication resources. The main objective of this paper is to reduce communication resources consumption in acceptable transmission latency for massive data generated from MTC devices. As an attempt to solve this challenge, a...
Human mobility pattern analysis are interesting and important topic which has become feasible nowadays by the flashing development of data collection and analysis platform technology. This paper leverages Call Detail Records(CDRs) data to analyze the mobility patterns of samples from Beijing residents. First, collective mobility and commuting patterns shows that Beijing residents are much busier than...
Recently, the idea of Surface acoustic wave (SAW) current sensor utilizing magnetostrictive effect provides a new effective way for sensing current, which exhibits some superior features as fast response, simple structure, and strong anti-jamming. The representative sensor structure is composed of a configuration of dual-delay-line oscillators, and a magnetostrictive film (FeCo) coated onto the sensing...
To suppress the hysteresis effect of the magnetostrictive film coated surface acoustic wave (SAW) current sensor, a patterned design on magnetostrictive FeCo coating was performed in this contribution. The developed sensor was composed of a configuration of dual-delay-line oscillators, and a strip-patterned magnetostrictive FeCo coated onto the SAW propagation path of the sensing SAW device. The patterned...
With the rapid development of informatization and the popularity of computer application, higher requirements are put forward for computer teaching in university. As one of the basic courses in universitie, “Computer Sience” carried out some reforms in the teaching content, but the teaching method is still based on instruction, supplemented by the computer exercises. The paper puts forward the blended...
A new computational method of computational fluid dynamics (CFD) coupled with rigid body dynamics (RBD) and flight control system (FCS) is developed. In simulations of FCS, the robust and simpler fuzz control method is used instead of the usual PID method. Taking the control of pitching attitude as an example, virtual flight simulations of the basic finner projectile are presented. Simulation results...
Spatial epidemiology, as an important branch of epidemiology, is attracting people's attention increasingly. Spatial assessment evaluation, as a non-typical research point of spatial epidemiology, is still attracting our attention in the field of spatial epidemiology. However, little research on behavior analysis about how people go to doctor exists, which is emphasized on in this paper from a spatial...
For face recognition with image sets, while most existing works mainly focus on building robust set models with hand-crafted feature, it remains a research gap to learn better image representations which can closely match the subsequent image set modeling and classification. Taking sample covariance matrix as set model in the light of its recent promising success, we present a Discriminative Covariance...
The ability to closely track the traffic load of base stations is very important for resource management and energy saving in green communications. Thus how to predict the future traffic accurately is critical and some recent studies show that correlation of traffic load exists among neighboring base stations. Inspired by these conclusions, this paper proposes a novel base station traffic prediction...
Based on the computer vision and neural network techniques, we propose a driver assistant system for automatic detection and recognition of Chinese traffic panels on highway. In detection stage, search regions are reduced by a simple ROI setting and traffic panels are efficiently identified by proper HSV color thresholding. In recognition stage, individual English characters are first located as maximally...
The upgrade of a legacy network to a full software-defined networking (SDN) deployment is usually an incremental process, during which SDN switches and legacy switches coexist in the hybrid network. However, with inappropriate deployment of SDN switches and design of hybrid control, the advantages of SDN control could not exert, and it even results in performance degradation or inconsistency (e.g...
In order to overcome the limitations of the traditional In Vitro Fertilization (IVF) culture method, this microfluidic chip is designed to integrate multiple functions to achieve the purpose of the embryos culturing in vitro. The chip combines the mechanism of dynamic flow resistance to trap and locate the embryos and co-culture with the stromal cells secreting the growth factors to give a better...
A lot of researches exploit the flexibility of Software-Defined Networking (SDN) to conduct traffic engineering in order to improve network performance and enhance robustness to failures. As the upgrade of a traditional network to a full SDN deployment is an incremental process, the coexistence of SDN switches and legacy switches forms a hybrid SDN. Due to the different forwarding characteristics...
This paper reports a combinational near infrared (NIR) and intense pulse light (IPL) sintering method for enhancing the surface morphology of metal mesh printed in organic light emitting diodes (OLEDs). This roll-to-roll process-supportive NIR and IPL sintering improved the as-printed surface roughness by 60.5%, implying improved OLED stability and reliability. In addition to surface roughness, structural...
Wheelchairs are devices used for mobility by people whose walking is difficult or impossible, due to illness or disability. There are many types of wheelchairs, including basic, light-weight, folding, multi-function, special types, and so on. Each of them has its advantages and disadvantages. Development of brain-computer interface applications has become quite popular in recent year. It allows direct...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.