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Venue photos, as a new type of multimedia contents, are exploding on the Internet because users like to take photos and share with their friends in which venue they spent time and what impressed them there. Discovering a venue by a social photo is very useful for supplementing venue retrieval and recommendation. However, little research focused on fine-grained venue discovery by leveraging multimodal...
Mobile phone not only becomes an important extended-self but also provides opportunity for researchers to record and investigate people's daily behaviors through it. The central goal of the study is to understand people's daily life routine as well as how they use cellphone to communicate and interact with others. Compared with conventional methods such as diary method or experience sampling method,...
The study uses speed context composed by temporal and spatial factors to analyze people's app usages in their daily life. Cellphone activities of forty-five students recruited from university campuses were recorded and analyzed. Recorded activities include app usages, monitor switching on/off, and geolocations, all with timestamp. The study categorized more than one thousand apps into seven categories...
This paper presents novel constrained consensus least mean square (cLMS) algorithms with adjustable constraints that can improve the learning performance of distributed estimation problems in sensor networks by exploiting the spatial diversity of the estimates. For the first algorithm, the constraint vectors are adjusted by combining the components of the estimate orthogonal to its neighbor estimates...
As a form of urban rail transit, medium-low speed maglev transportation system also requires safety-critical design in its operation and control system (OCS), for the OCS system relates to not only operation efficiency, but system reliability and safety as well. The train positioning system, which is the most important component in OCS, counts the real-time train position and helps OCS to give the...
Medium-low speed maglev, as a form of urban rail transportation system, has already drawn a lot of attention from researchers and engineers for its advantages of low noise, strong climbing ability and flexible route planning. The train positioning system, as a matter of fact, is a very important part in operation and control system (OCS) of medium-low speed maglev transportation, for it collects real-time...
This paper presents two algorithms for optimizing the transmit and receive antenna selection matrices in Multiple Input Multiple Output (MIMO) Device-to-Device (D2D) communications. MIMO antenna selection technique is well-suited for D2D communications since it is relevant to low-cost devices with less Radio Frequency (RF) chains than antennas, and requires low feedback. The proposed algorithms determine...
Based on the field research data of more than 20 counties and cities in Anhui Province, the empirical test is carried out for the utilization status of different groups of medical services by seemingly unrelated regression model. The study shows that there is a high similarity between the agricultural registered population and the urban flexible employed population in the medical service utilization...
We numerically investigate small and large signal modulation of a photonic crystal laser with a mirror based on Fano interference between continuum modes of a waveguide and a discrete mode of a nanocvaity. Our simulation shows that the instantaneous optical frequency of the laser signal can be modulated at frequencies exceeding 1 THz which is much higher than its corresponding relaxation oscillation...
Face hallucination, which refers to predicting a HighResolution (HR) face image from an observed Low-Resolution (LR) one, is a challenging problem. Most state-of-the-arts employ local face structure prior to estimate the optimal representations for each patch by the training patches of the same position, and achieve good reconstruction performance. However, they do not take into account the contextual...
A detailed theoretical and numerical investigation of the dynamics of photonic crystal Fano lasers is presented. It is shown how the dynamical model supports self-pulsing, as was recently observed experimentally, and an in-depth analysis of the physics of the self-pulsing mechanism is given. Furthermore, it is demonstrated how different dynamical regimes exist, and these are mapped out numerically,...
Laser self-pulsing was a property exclusive to macroscopic laser systems until recently, where self-pulsing laser operation was demonstrated experimentally and theoretically in a microscopic photonic crystal Fano laser [1]. We now provide a detailed theoretical analysis of the self-pulsing mechanism and laser characteristics with numerical simulations to demonstrate the parameter dependence of the...
Conventional semiconductor laser mirrors are based on Fresnel reflection [1], Bragg reflection [2, 3] or total internal reflection [4]. Here we demonstrate a new laser concept using photonic crystals (PhC), with a mirror based on Fano interference between a waveguide continuum and a discrete resonance of a nanocavity [5]. We show that the very narrowband feature of the Fano resonance [6] can lead...
In this paper, we experimentally demonstrated 400G/500G single-carrier in 50-GHz grid for 1000-km G.654 fiber transmission with Raman amplifier. 43.125-Gbaud PDM-64QAM (400G net) and PDM-128QAM (500G net) achieved spectral efficiency of 8 and 10 bit/s/Hz.
We propose a method of combining multi-tap pre-coding and faster-than-Nyquist filter for generating sub-symbol-rate sampling signal. Single carrier of 483-Gb/s (120.75-GBaud) PDM-QPSK modulation is demonstrated by using 92-GSa/s DAC with sampling rate of 0.76-sample/symbol.
Effect of nitrogen annealing on SiC/SiO2 interface properties was comparatively investigated for SiC MOS capacitors. Interface properties were characterized by normalized parallel conductance and interface state density value, and dielectric strength was evaluated by the electric-field-to-breakdown (Ebd). The results exhibited that both fast and slow states were present at the nitrogen-annealed samples'...
This study employed red and blue light-emitting diodes (LEDs) and cold cathode fluorescent lamps (CCFLs) to stimulate orchid seedlings and examine the influence of various light sources in mother stock flasks. Using the Taguchi method, we identified the optimal parameter combination to be photoperiod 12 hours, ON-period 30 %, CCFL 0 Lux, red LED 500 Lux, and blue LED 150 Lux. The results show that...
JavaScript is a dynamic programming language that has been widely used nowadays. The dynamism has become a hindrance of type analysis for JavaScript. Existing works use either static or dynamic type analysis to infer variable types for JavaScript. Static type analysis of JavaScript is difficult since it is hard to predict the behavior of the language without execution. Dynamic type analysis is usually...
Metric learning is an important issue in person re-identification, and Mahalanobis-distance based metric learning methods prevail in this field. All of these approaches can be considered as equivalently projecting all samples to a new metric space and calculating the Euclidean distance there. However, the performance of distinguishing similar samples from dissimilar ones via absolute distance is limited...
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