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.
To deal with the uncertainty rising with high wind penetration, it is technically and economically important to consider reserve provision by wind generation (WG). Storage could mitigate the WG volatility, so reserve provision by combination of WG and storage could be more competitive in reserve market. This paper presents a new unit commitment (UC) model, in which both WG reserve opportunity cost...
The two-layer dual-Circular Polarization (CP) reflectarray antenna has been designed in this paper. The upper element structure is based on CP selective surfaces (CPSS) for LCP and the second layer adopts reactively loaded ring slots for RCP. Finally, a 20-cm two-layer reflectarray antenna has been designed and simulated for verification. A good agreement with the corresponding single layer demonstrates...
This paper presents a simulation study on the implementation of the Single Star Flying Capacitor Converter Modular Multi-level Cascaded Converter (MMCC-SSFCC) as a STATCOM operating under voltage sag condition. This paper proposes a cluster balancing control, using a zero sequence voltage injection technique for the SSFCC-STATCOM operating either as a reactive compensator under Low Voltage Ride Through...
Inefficient utilization of electricity business expanding data in State Grid Companies related departments still exist. It is because of their excessive attention on the speed of electricity supply and the quality of service, but ignores the potential useful information of the data implied in the future electricity sale market. With this regard, this paper proposes a novel analysis and forecast method...
Spatial load forecasting is a significant basis for power system planning and construction. With the development of renewable energy generation and the continuing deterioration of the environment, energy alternatives is becoming a new growth point of load. The methods present cannot take energy alternative into consideration appropriately. To solve it, this paper analyzes the temporal and spatial...
With the background of China's fast growing economy, Internet has become a key factor to keep the economy go steadily. It is important to quantitatively analyze the whole Internet industry and hence master its development direction clearly, which will provide regulators with reference for industry analysis, policy formulation, and policy evaluation. This article re-constructs the calculation method...
The goal of this paper is to acquire the energy response functions precisely with enough accuracy for spectral restoration and reconstruction. In this work we estimate the response functions of the XCounter Flite X1 detector by measuring the spectrum of the X-ray fluorescence. The incident spectrum and the deposited spectrum are simulated by the Monte Carlo method using Geant4. The broadening of deposition...
To reduce patient's dose, few-view CT reconstruction promises to be a good attempt. The key to better reconstruction is the sparse view artifacts. In recent years, DL(deep learing) has attracted a lot of attention because its outstanding performance in image processing. We propose a deep learning method for few-view CT reconstuction. Our method directly learns an end-to-end mapping between the full-view/few-view...
With the two fold aim of analyzing the energy dispersive X-ray diffraction (EDXRD) system for illicit materials detection and of selecting optimal configurations prior to experimental tests, a simulation method for modelling the response of EDXRD system has been proposed. The simulation is done based on two orthogonal planes of the system: the diffraction plane (H-Plane) and its vertical plane (V-Plane)...
The degrading factors of photon counting detectors such as charge-sharing, K-escape, resulting in spectrum distortion, set the crucial limitation for its application in quantitative imaging. We present a method to eliminate the degrading factors by spectral deconvolution. Simulation study and experimental study were carried out to verify its effectiveness and robustness. In simulation study, the method...
The energy dispersive x-ray diffraction (EDXRD) is a novel identification technique suited to security screening. The validity of liquid classification method based on EDXRD and hybrid discriminant analysis (HDA) is demonstrated by previous work. As the spatial resolution of the EDXRD system is relatively low, the measured spectrum from one detection unit might be a mixed spectrum of two objects....
In order to make full use of the parallelism of NoC and improve the parallel communication ability between resource nodes, a high performance dual-port network and relative routing algorithm are introduced in this paper. Meanwhile, the Torus structure is also used in the design to further improve the network performance, which provides better connectivity of network and smaller radius. This paper...
Spectrum peak search (SPS) is the final step of MUSIC algorithm, the amount of computations has increased a lot with the improvement of accuracy requirement and the expansion of search scope. In this paper, a novel circuit is designed to realize two-dimensional spectrum peak search, the search scope of azimuth and pitch are −180∼180 degree and 0∼90 degree. There is the logic circuit instead of memory...
In order to study the (√3×√3) R30°(abbr.√3) and (3×3) reconstruction structures on 6H-SiC (0001) -Si terminal after S atoms adsorption, the first-principles calculations were performed to investigate the properties of surface adsorption energy, bond lengths, bond angles, density of states, and bond population. The results show that S atoms can open the reconstruction bonds on 6H-SiC surfaces. TOP...
In this paper, a coarse-grained reconfigurable computing unit (RCU) is designed for the heterogeneous multi-core system (HMCS) which is applied to high density computing field. As a data-driving computing unit, RCU can work in two modes: stream-mode and store-mode. In first, it achieves a higher efficiency, while in latter it attains a better flexibility. The architecture of RCU is optimized for some...
This paper presents a configurable 1/2/3 order Butterworth low pass(LP)/complex bandpass (CBP) filter for sub-GHz Applications in a 180-nm CMOS process. The filter employs operational transconductance amplifier (OTA) unit with feedforward capacitor instead of conventional two-stage amplifiers to broaden bandwidth while consuming no extra power. In order to achieve a good noise figure, extra noise...
To evaluate the operational flexibility of power system can accurately grasp the regulating capacity of power system, which is helpful to deal with the variability and uncertainty of wind power. Energy storage brings new opportunities for power system operation. In the day-ahead dispatch stage, energy storage can be used to optimize the scheduling and improve the economic performance of power system...
A data acquisition and monitoring system of machine tools is designed, which is based on Zigbee and GPRS wireless communication technology. The monitoring and alerting about the safety status of the machine tools operates via the acquisition of such physical parameters as temperature and noise. The hardware such as the CC2530 RF circuit and power module is designed. Based on the CC2530 module and...
A single-layer differential coplanar waveguide (CPW) fed antenna is proposed for common-mode suppressed and WLAN band notched ultra-wideband (UWB) applications. The UWB nature is generated by the stepped slot radiators and a pair of differential stepped CPW feeding lines. When two ports of the antenna are fed with common-mode signals, the radiator cannot be excited and common-mode suppression is obtained...
Glossoscopy is an important part of Traditional Chinese Medicine (TCM). To analyze the tongue properties objectively, we need extract the tongue region from images. This paper presents a method to segment the tongue images based on kernel FCM (Fuzzy Cluster means). Firstly we pre-processed the tongue images by gray-level integral projection. Secondly the features were extracted to form a feature vector...
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.