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.
Wind turbine wakes effects are critical issues for large wind farms. With the increasing dimensions of wind turbines and wind farms, there are strong interactions between the wind turbine wakes and atmospheric boundary layer (ABL). In this study, we focus on the daily variation of characteristics of ABL and its impact on the development of wind turbine wakes. To investigate this issue, a series of...
As high resolution as Radarsat2 SAR, it is possible to sense the sea surface as a number of capillary waves as well as foam. Thus an analytical model is considered to be reasonable for polarimetric SAR scattering matrix, based on the modelling of radar backscattering coefficient as the co-contribution of Bragg (polarized) and Scalar (unpolarized), which was proposed by Quilfen et al. [1] in 1999....
We present a novel method for multiplexed on-chip integrated sensor-array, which are based on ultracompact one-dimensional photonic-crystal nanobeam cavities with ultrahigh-Q and very large-free-spectral-range (LFSR, ∼200nm). The high refractive-index sensitivities of 166.4nm/RIU can be achieved.
We demonstrated an all-silica beam information detector based on Pancharatnam-Berry phase which can effectively detect the signal while the original wavefronts are strictly protected. A chiroptical spectrometer and a 12-channel angular momentum detector were proposed.
Partial discharge (PD) in power transformer degrades the dielectric insulation and results in insulation failure and breakdown after a long period. In fact, a partial discharge detector can gather signals from two or more PD sources which increase the difficulty on pattern recognition and insulation state assessment. How to separate multiple PD signals is meaningful to subsequent data processing....
The junction temperature fluctuation of an Insulated Gate Bipolar Transistor (IGBT) is the most important factor of its aging failure, and smoothing the fluctuation is an effective way to improve the life of an IGBT. The existing method of smoothing the fluctuation is not yet ready wide application, and exploring the different approaches to active junction temperature control is a hot topic. This...
For long-distance transmissions, relay-aided transmission technique is a promising solution to improve the performance for the free-space optical (FSO) communications. In this paper, a serial decode-and-forward relay-aided FSO communication system is considered. In the system, the main noise is Gaussian noise, however, with a noise variance depending on the current signal strength. Moreover, a composite...
This paper presents an optimized doping strategy for vertical-channel three-dimensional (3D) NAND flash. This NAND flash is junction-free without dopant inside the string. Source side near SSL and drain side near GSL are both n-doped junction, providing electron in +FN programming. P-doped substrate provides hole in −FN erasing [1]. Carrier source in both program and erase does not depend on GIDL...
Improvements of energy efficiency and reduction of electricity consumption can be promoted by growing knowledge on the determinants of residential electricity consumption level (RECL). Due to numerousness, complexity and multiple correlations among impact factors (IFs) of RECL, feature selection is an essential step to ensure the precision and stability of an explanatory model. However, the current...
Recently, the physical-layer security, which exploits the channel characteristics in order to hide information from unauthorized receivers and does not reliance on the upper-layer encryption, has been proposed as a promising complement to the traditional security schemes. In this paper, the lower bounds on secrecy capacity for indoor visible light communications (VLC) are investigated. The noise is...
As a major part of household electricity load in summer, air conditioning (AC) consumption demonstrates enormous demand response (DR) potentials and numerous AC based DR programs are carried out annually. Understanding electricity consumption behaviors is one of the key elements for utilities to design more cost-effective DR programs. So studying on the AC electricity usage habits is of great significance...
This paper presents an addition and multiplication computation cell using pulse train time amplifier (TA) and time register (TR), which could be easily extend to large-scale computation. The proposed pulse train TA exploits a delay cell ring to realize large input range. In TR a gated delay line with MOS capacitor is adopted to achieve both large number computation and high resolution. Finally, a...
To evaluate the influence of voltage sag on electric-equipment and guide the design of compensation scheme for voltage sag, we need to evaluate the severity of effect of voltage sag on loads. This paper analyses the agglomeration effects of multiple voltage sag on the time scale. For irregular multiple voltage sag, this paper converts its voltage time-series curve into voltage duration curve, and...
Energy storage system (ESS) are playing a more important role in renewable energy integration, especially in micro grid system. In this paper, the integrated scheme of energy storage system is designed. And a demonstration project of 1MWh energy storage power station which was accessed to a photovoltaic system was built. The structure of the storage system was given. Two control strategies of the...
With the process of China's entering a serious aging society, it generally becomes one of the problems for people caring as elderly falls frequently. Thus, it is necessary for us find a way that the old people get help timely when it happened. On studies related to falls in outdoors currently, popular methods are on Computer Vision and Inertial Sensor. The problems of these researches are focus on...
Recently, the optical spatial modulation (OSM) technique has been proposed for visible light communication (VLC). However, its design flexibility is limited by the fact that the number of transmitters has to be a power of two, given that the number of bits mapped by the transmit antenna index at each time slot is required to be an integer. In the paper, to break the limitation on the required number...
The gap between design and implementation always exists because changes happen frequently throughout software development process, along with rapid release cycles, and accompanied by time constraints and limited resources. The focus of our work is to reduce this gap for service-oriented projects. We proposed an approach which considers both technical strategies and agile methods, trying to streamline...
Based on the parallel DTCs as delay cells, a 4-bit TDC with adjustable 0.7ps∼1.4ps resolution and 11ps∼22ps dynamic range is proposed in this paper. In this design, an extremely high resolution DTC is presented, achieving 15.6fs delay per LSB. By utilizing 16 DTCs which are adjusted to have the same time interval among two neighboring DTCs, a highly linear TDC is realized. To avoid the manual tuning,...
This paper designs a vertical-interconnect transmission structure which could be applied in PoP(Package on Package) package structure. In this model, Through Mold Via(TMV) transmission structure is utilized to realize inter-side and stacked-model interconnection. A quasi-coaxial via cluster connected to the strip line is designed for vertical RF transmission. It was found that the center distance...
Economy, reliability and environmental friendly are primary goals when modeling modern unit commitment problems. In this study, we establish a multi-objective unit commitment model considering the above objectives. In particular, the pricing support for ultra-low emissions is addressed together with startup/shutdown, generation and environment concerns when calculating the operation cost of thermal...
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.