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Sparse arrays can generate a larger aperture than traditional uniform linear arrays (ULA) and offer enhanced degrees-of-freedom (DOFs) which can be exploited in both beamforming and direction-of-arrival (DOA) estimation. One class of sparse arrays is the coprime array, composed of two uniform linear subarrays which yield an effective difference co-array with higher number of DOFs. In this work, we...
Economic growth has become an academic research focus. In this paper, economic growth of Liaoning Province in recent 10 years is studied based on the catastrophe theory. First, the evaluation index system of economic growth is established according to factors affecting economic growth. And the relative importance of indexes is determined by the entropy weight method. Indexes' catastrophe assessment...
Hyperspectral image (HSI) classification is a popular issue in the domain of remote sensing. The fundamental challenges in HSI classification include small number of training samples, high dimensionality of the hyperspectral data and suitable spatial-spectral features. In this paper, we propose a novel multiple features fusion method for HSI classification based on extreme learning machines (ELM)...
In this study, a data-fusion algorithm is developed for estimation of high-resolution brightness temperatures (TB) at 1km from Soil Moisture Active Passive (SMAP) fine-grid TB product at 9km. It uses image segmentation to spatio-temporally cluster the study region based on meteorological and land cover similarity, followed by a support vector machine based regression that computes the value of the...
The multi-azimuth-angle (MAA) UAV SAR is introduced in this paper. Compared with the traditional TomoSAR that rebuilds the 3-D scene only from the boresight aspect, the MAA UAV SAR can rebuild the 3-D scene from different multi azimuth angles and then provide multiple or even full aspects 3-D image by the novel 3-D image formation algorithm presented in this paper. Firstly, the MAA UAV SAR is introduced,...
In this study, the impact of spatial variability due to the heterogeneity of vegetation in the agricultural region on passive microwave signatures available at various scales are explored using the brightness temperature (TB) observed from ground, air, and space. These observations were conducted during a growing season of corn and soybean in South Fork watershed, Iowa, as part of the NASA-Soil Moisture...
Polarimetric synthetic aperthetic radar(POLAR) is more advanced imaging radar, which includes four channels and provides more information than a single-channel SAR image. However, existing change detection methods cannot make use of polarimetric information from POLSAR data to extract difference image. In this paper, a novel method of change detection based on low rank and sparse decomposition with...
In this paper, the concept of micro energy internet is discussed firstly. To achieve economic and environmental goal in the operation of micro energy internet, a hierarchical energy management system is proposed to handle the power flow exchanged between the micro energy internet and the host grid. First, the concept, characteristics and operational goals of micro energy internet is investigated....
For scientific management of sewage treatment operation of city, and playing a greater environmental and economic benefits, this paper takes into account the factors such as watershed planning and construction of sewage treatment plant comprehensively, to establish a comprehensive evaluation indicator system for urban sewage treatment. The calculation method of evaluation standard and index is established...
The very high resolution (VHR) images can be seen as multiview data. For better organizing and highlighting similarities and differences between the multiple views of data, a semisupervised multiview feature selection (SemiMFS) method is proposed in this paper, based on consensus and complementary principles. In SemiMFS, feature views are generated by decomposing features into multiple disjoint and...
Nowadays, more and more chatbots can get acquainted with the world by equipping with knowledge-rich minds which connect to Internet. In this paper, we will first explore how to integrate more knowledge into chatbot and how to make chatbot be aware of what are going on in the world. On top of that, a series of evaluations were performed on the prototype system. Through the evaluations, we mainly want...
The frequency modulated continuous wave (FMCW) synthetic aperture radar (SAR) has the properties of compact size, lightweight, low cost and low power dissipation, which provides great potential in the application of precision guidance. This paper presents an imaging method of FMCW SAR with diving acceleration. The series reversion algorithm is used to evaluate the accurate expression of the received...
On the basis of the interaction law of IT resources and IT application capabilities, using collaborative theory point of view, IT resources and IT application capabilities coupling measure model is established, which involves the active function, coupling degree functions, coupled coordination function and IT resources and IT ability coupling evaluation index system. According to the model, combined...
Poor power quality and phase splitting are the main issues in electric railway. Co-phase traction power supply system is adopted in electrified railway for active power balance, reactive power compensation and harmonic filter. The research development and application of co-phase traction power supply system in China are depicted detailed in this paper. Experiments and pilot project proved that good...
The paper investigates the Relative Advancement Degree of Difficulty (RAD2) problem to evaluate the feasibility and effectivity of the technology. Firstly, the study reviews concept of Technology Readiness Level (TRL), Earned Value Management (EVM). Then, an improved method was developed by integrating the impact on cost, schedule and technical performance to calculate the RAD2. With the result of...
With the development of the equipment, general quality characteristics (GQCs) are getting more and more important. This paper mainly focuses on the procedure and several methods for identification of GQCs.
Recently, the variable channel-width (VW) scheme was proposed to improve the performance of WLANs. Cooperative channel allocation has been studied in some existing literature under the assumption that the traffic demands of cooperative access points (APs) are constant. In fact, the traffic demands may vary when the corresponding stations change their AP association decisions. Hence, this work jointly...
Using the methods of fault types and the effect analysis identified all types of risk existing in mine ventilation system and its index system. Deciding the constant right value for each index through the method of combing the fuzzy interval method and the analytic hierarchy process method and achieving variable weight using the value change of hazards and in the end establish the mathematical model...
Pro/3 v1.1.1-the production system-type expert system shell based on Visual Prolog6.2 is introduced. The parameter rule function of inexact rules was corrected in the Pro/3. Its corrective code is given. The expert system about shopping and assessment of a current transformer was implemented by researching the Pro/3. The goal of the expert system is that it gives a degree of suitability (membership...
To implement the sustainable development in iron and steel industry, many iron and steel enterprises have begun to explore the way of green manufacturing. In this paper, a relative green degree evaluation model for equipments of iron and steel enterprises is established. A five-dimension evaluation index system for equipment is created which is TPCRE (T-Time, P-Performance, C-Cost, R-Resource, E-Environment)...
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