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Depression is a mental disorder characterized by persistent occurrences of lower mood states in the affected person. According to the study of World Health Organization (WHO), depression will become the second largest cause of illness threatening the life of human beings in 2020, so early detection, early diagnosis and early treatment of depression is very important to save the health and life of...
User-generated mobile application reviews have become a gold mine for timely identifying functional defects in this type of software artifacts. In this work, we develop a hidden structural SVM model for extracting detailed defect descriptions from user reviews at the sentence level. Structured features and constraints are introduced to reduce the demand of exhaustive manual annotation at the sentence...
Relative carrier envelope phase control was actively exploited in dual-comb spectroscopy, and polarization-modulated pulse train generation and its coherent detection were demonstrated. This proof-of-principle experiment promotes advanced coherent spectroscopy using optical frequency combs.
In this paper, a three loop control strategy (TLCS) based on decoupled zero voltage switching angle (ZVSA) loop is proposed for a series-series (SS) compensated wireless power transmission (WPT) system. To realize constant current charging for EVs and ZVS operation of primary inverter, variable frequency and phase shift control strategy (VF-PSC) is adopted. However, the control variables that are...
In recent years, wireless power transfer (WPT) technology has developed rapidly. In order to control power transmission and optimize efficiency, a large number of control methods have been proposed. Due to the unique inherent characteristics of the WPT system, the various control methods are faced to three challenges. First, transmission efficiency is significantly affected by the change in output...
In order to achieve effective protection of digital image information and provide anti-attack capability for encrypted image, this paper proposed an ACP-based Approach to color image encryption using DNA sequence operation and hyper-chaotic system. By using the ACP method which is a way to solve the social computing problem, the influence of the chaotic data from the real world and the influence of...
With the rapid development of big data analytics in online marketing, real-time bidding (RTB) has emerged as a promising business model in recent years, and now becomes one of the major online advertising channels. Based on analysis of Web Cookies, RTB platforms are able to precisely identify the features and preferences of target audiences visiting publishers' websites, and forward the generated...
In the paper, considering the limitation of effective method in E-learning area, a recommendation framework for E-Learning based on deep learning is proposed. Our model is based on deep learning, which has strong capability to learn from large-scale data. It has some improvements than previous methods. First, it is based on the conventional K-Nearnest Neighbor(KNN) method to train a model, thus its...
With the ever-growing popularization of Real Time Bidding (RTB) advertising, the Ad Exchange (AdX) platform has long enjoyed a dominant position in the RTB ecosystem due to its unique role in bridging publishers and advertisers in the supply and demand sides, respectively. A novel technology called header bidding emerged in the recent one or two years, however, is widely believed to have the potential...
Real time bidding (RTB) has become an emerging online advertising with the development of Internet big data in recent years. In the whole RTB ecosystem, the Demand Side Platform (DSP) plays a central role, and it realizes the programmatic and accurate buying of the advertisements for the advertisers via a two-stage auction. In RTB business logics, DSP plays as an intermediary between the advertisers...
In DC microgrid with increasing number of constant power loads(CPLs), conventional control is difficult to guarantee the stability and dynamic performance of the whole system. For this reason, this paper introduces a property of passivity theory and deduces the passivity-based stabilization criteria in DC microgrid. Based on this stabilization criteria, a passivity-based stabilization method considering...
In the underwater passive target detection system, direction of arrival (DOA) estimation of traditional uniform linear array (ULA) becomes poor when targets come from the direction of end-fire. To solve this problem, this paper develops a new DOA estimation method for the wideband signal based on A-shaped array, which is implemented via two ULAs distributed with a specific angle. Firstly, the A-shaped...
With the continuing development and innovation of modern information and communication technologies in recent years, social media platforms, such as WeChat and Microblog, have been witnessed to play a key role in employee management for enterprises or organizations, enabling individual or groups of employees to express their viewpoints or report their works in a real-time fashion. The resulting Cyber-workspace...
When online advertising met the big data technology, programmatic buying has become more and more popular, in which Real Time Bidding (RTB) is regarded as one of the most important formats of programmatic buying advertising. In RTB advertising markets, there is a two-stage auction process for each ad impression, in which Demand-Side Platforms (DSPs) adopt a two-stage resale model to get their revenues...
The main contribution of this paper is a planar scan matching algorithm that makes use of the incident angle of a scan point as a feature to enhance the robustness to large relative transformations, particularly in orientation. A new definition of the incident angle is introduced and its consistency with respect to relative transformation between scans is demonstrated. A method that uses the Radial...
At present, the energy consumption of wireless communication network accounts for the vast majority of the operator's expenses. A cooperative energy saving mechanism is proposed in the framework of the self-organized network, based on the hybrid energy supplied, aiming at the energy consumption of cellular is too large and the utilization rate of green energy is low. According to the framework, the...
We demonstrate a low coherence phase shifting interferometer of a femtosecond laser for optical surface measurement. Phase shifting is realized by sweeping the repetition rate instead of the mechanical scanning. With this method, we reconstruct a glass slide surface which agrees well with that measured by a commercial Fizeau interferometer.
Dual-comb spectroscopy is a powerful spectroscopic method that can measure broadband spectral information with high accuracy and a short acquisition time. We have been particularly developing a new method to evaluate the complex refractive index of solid samples based on the dual-comb technique. In this research, we aimed to realize a simple and practical dual-comb spectroscopic system with broad...
In this study, we particularly focus on the coherent controllability of optical frequency combs. By appropriately adjusting the four frequency parameters involved in dual-comb spectroscopy, frep, Δfrep, fceo, and Δfceo, unique and arbitrary coherent modulation schemes can be realized. In a demonstration, the interferogram was successfully modulated by controlling the Δfceo. This proof-of-principle...
Dual-comb spectroscopy (DCS) is a new Fourier spectroscopic method which realizes precise and rapid spectral detection with a broad bandwidth. In this study, we applied DCS to characterization of birefringence of anisotropic materials. As a demonstration, we evaluated the refractive index and the birefringence of an anisotropic crystal, Nd:YVO4. We confirmed the evaluated values were consistent to...
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