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With the development of distributed power, and based on the advanced ideas of FREEDM system (the Future Renewable Electric Energy Delivery and Management System), the Power electronic transformers has gained increasing importance in the future power distribution system. In this paper, Bidirectional DC-DC Converter topology used in the power electronic transformer is introduced, which can optimize...
To enhance the smart phones-automotive interconnect products experience pleasure, due to the fact that there is a few method to test and evaluate Human-Computer Interaction and user experience of the smart phone-automotive interconnect products, An evaluation method based on the user behavior / psychology on smart phone-automotive interconnect products was proposed, a series index system of evaluation...
The 2×2 wireless LAN (WLAN) + Bluetooth (BT) combo chip continues to be the most versatile product category in the wireless connectivity space. It finds usage in a wide range of applications, such as laptops, tablets, high-end smartphones, gaming consoles, set-top boxes, wireless routers and in-car/personal hot-spot devices. Digital-intensive SoCs have been relying on Moore's law to keep the cost...
High-performance phase-locked-loops (PLLs) are key building blocks for many modern ICs. The sub-sampling PLL proposed in [1] uses a reference clock REF to sample a high-frequency VCO and converts phase/timing error into voltage. The steep dv/dt slope of the VCO helps to realize a high phase-detection gain and greatly suppresses the noise of loop components succeeding the phase detector, leading to...
The seismic (especially collapse) of structure and casualties were always paid more attention to after the earthquake. A great deal of manpower and resource have been invested to prevent the failure of structure under severe earthquakes, and the seismic performance of structure was improved obviously. In contrast, the seismic damage of nonstructural system (such as ceiling system) was also severe...
The dynamic response of large space structures under accidental impact has been the subject of intense research since the occurrence of the 9/11 incident. In the present paper, events of aircraft impact to the single-layer kiewitt-8 reticulated dome were simulated by using the 3D ANSYS/LS-DYNA. Impact loadings were carried out respectively by the Riera force history method and by modeling a real plane...
Indoor localization is of importance for many applications. Crowdsourcing individual users' measurements can provide accurate localization without costly site-survey. However, crowdsourcing based approaches suffer from the cold start problem, in which at the beginning of system deployment, there are insufficient users to contribute their measurements, resulting in inaccurate and time-inefficient localization...
Entire areas of study, such as community phylogenetics and comparative analysis, require detailed phylogenetic, as well as ecological information. China has 31,362 species of vascular plants belonging to 3,328 genera and 312 families, which is ranked in the top six megadiverse countries of the world. along with the big tree of vascular plants in China has been completed recently, SoTree, an automated...
In minimally invasive surgery (MIS), surgeons perform surgical planning by preoperative CT images which contain the spatial information of tumors and blood vessels in the targeted operation area. However, the spatial information will be compromised once the operation begins and the surgeon can only reply on his/her anatomical knowledge and judgment. In most cases, surgeons will work in an open-loop...
In this paper, a group recommender system for online course study (GRS-OCS) is presented. GRS-OCS makes full use of the historical information about course ratings and former learners. Both collaborative filtering and content-based filtering are incorporated in GRS-OCS. A preliminary evaluation has been conducted based on the real data of MOOC. Empirical evaluation and user survey demonstrate the...
The increasing popularity of photo sharing in social networking service (SNS) complicates the challenge of storing and transmitting large photo data for SNS providers. Distributed web caches are generally used by SNS providers to improve data transmission performance effectively. Two critical factors affect the efficiency of web caches: storage media and replacement algorithms. Solid-state drive (SSD)...
In this study, Synthetic Aperture Radar images containing surface waves and coastal wave breaking were obtained in conjunction with reference in-situ data near the east coast of Hainan, China during the flight experiment for SAR application at land and sea in 2009. The surface wave spectra and the associated wave parameters retrieved from RADARSAT-2 images are compared with the observation from Wave...
To implement a preventive measure for protecting people who require assistive walking devices, this study designed an intelligent walking cane that monitors the user's vital signs and provides information to assist them with managing their health. In the event of an accident, the cane triggers an emergency event that alerts bystanders and transmits current location data to emergency personnel through...
Study shows that back injuries are the main reasons of disabilities in American for the people under 45 years old [1]. According to the survey of the National Institute for Occupational Safety and Health(NIOSH), which is a part of the Centers for Disease Control and Prevention of USA, there is no proof of the effectiveness of the back belt for prevention the back pain and injuries. Despite the lack...
As the scale of the solar cell moves into nanometer regime, the numerical analysis should evolve at the same pace. By using the Matlab® as the tool and solving the general Poisson and continuity equations, we are able to have a good platform for the nano-scale solar cells. By adapting proper parameters, the perovskite solar cells and their behavior under different surface recombination conditions...
A highly efficient LED is demonstrated by incorporating the colloidal quantum dots and sodium chloride. Further lifetest shows great stability up to 104 hours under 194 mW/cm2 of UV pump power.
To reduce the tracking errors caused by the background change and occlusion in dynamic scenes, a novel Mean-Shift moving target tracking algorithm based on weighted sub-block is proposed in this paper. Moving target tracking is completed by blocking the target region. The weight of each sub-block is determined by the combination of the similarity between target sub-block and candidate sub-block and...
Assimilation, Accommodation and Equilibration are three important concepts in the description of the developmental process of human cognition in schema theory. Based on comparing some relative ideas in adaptive resonance theory and schema theory, a self-adjusting method to the vigilance value of ART2 network is proposed. It constructs the basis of supervised ART2 network, which make the computer simulation...
This paper introduces an analysis framework to track the evolution of research topics based on the content including topic evolution trend, main evolution path and content changes over time. After the topics were identified by the citation-topic model, we first built a 2-mode co-occurrence (the keywords and topic co-occurrence) network to track the dynamics of topic trends. Then we built a single-mode...
This paper mainly investigates the mean square stabilization problem for discrete-time networked control systems (NCSs). It is assumed that there exists a single network-induced delay between the controller and the plant, while the control signal is sent to the plant over a lossy communication channel whose packet dropout process is modeled as an independent identically distributed (i.i.d.) Bernoulli...
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