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With the rapid development of interconnections of regional power network, wind power and photovoltaic power etc. new energy connected to power grid, it poses a huge challenge to power grid control systems. The frequency stability and main ways of dealing with the instantaneous power gap in the power grid mainly depends on primary frequency compensation(PFC) based on thermal power units. By analyzing...
In this paper, we present a perspective that a solution process for a class of distributed optimization is passive. After formulating the intended distributed optimization problem, we design a distributed optimization dynamics based on so-called PI consensus algorithm. The dynamical system is then shown to be regarded as a feedback interconnection of passive systems and hence to preserve passivity...
In this paper we propose a new optimal power flow scheme that takes into account the harmonics generated by power electronics interfaced distributed generation (DG). The objective is to minimize the cost of generation under constraints on the total harmonic distortion (THD) of voltage. The frequency coupling matrix (FCM) is used to model the harmonic current injected by a converter. Network current...
In this paper, we address energy management for heating, ventilation, and air-conditioning (HVAC) systems in buildings, and present a novel combined optimization and control approach. We first formulate a thermal dynamics and an associated optimization problem. An optimization dynamics is then designed based on a standard primal-dual algorithm, and its strict passivity is proved. We then design a...
Calculating endurance is very important for solarpowered airplane, both with respect to aircraft designs and mission planning. This paper presents a graphical method to evaluate the approximate endurance of solar-powered unmanned aerial vehicles (SUAV). The method, which is based on the principle of energy balance, is established in this study. According to the principle, cruise endurance is considered...
This paper intends to find the critical success factors for smart green city logistics business in Fuzhou. We first investigate and collect the factors that impact the operations of smart green city logistics business. In order to acquire the experts’ assessments on the influence between each two factors, we invite the managers who serve in the top five logistics companies in Fujian and conduct expect...
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...
This paper focuses on rainfall retrievals using 118GHz and 183GHz channels of microwave humidity temperature sounder (MWHS-II), which has been launched onboard FY-3C satellite. These channels contain various information about the rain. The dataset of FY-3C and GPM are matched in the aspects of time and location and the retrieval algorithm is established. Using the 118GHz and 183GHz channels, the correlation...
Gaofen-5 (GF-5) satellite is designed to provide high resolution imagery for land observation and disaster monitoring and will be launched in 2017. As true GF-5's data is unavailable, image simulation can be a useful tool to provide test images for research on relevant key techniques. In this paper, an emissivity image simulation method is proposed for 4 thermal infrared (TIR) bands on one of GF-5's...
This paper proposed a difference of standard deviation operator to detect temporal changes in multi-temporal Radarsat-1 SAR images which is derived from the classical multiplicative model. When changes are occurred, textures of the terrestrial surface will be modified resulting in the variation of standard deviation of the terrestrial surface. The new Riemannian metric is introduced into the unsupervised...
This paper presents a variational method for SAR image segmentation that unifies boundary- and region-based information into the geometric active contour model. A new Riemannian metric is introduced to construct region-based energy function derived by maximizing the geodesic distance of a new Riemannian metric in differential-geometric structure for spectral density functions. A heterogeneity indicator...
GNSS is capable of providing high-precision and drift-free attitude information. The traditional attitude determination methods based on the baseline vector and carrier phase measurement process attitude determination estimation and ambiguity resolution sequentially. And the redundant measurements from multi-baselines have not been fully utilized. A GNSS measurements based attitude determination method...
This paper is concerned with an optimal control problem of anticipated forward-backward stochastic differential equation with delay. We obtain an explicit representation of optimal control for delayed problem first, and then use it to solve a delayed cash management problem with recursive utility. The explicit optimal control strategy of the investor is given and some numerical simulations are used...
Biosensor technology is one of the hot research topics in recent years, and has been researched earlier in food analysis scope, but its application in the scope of food nutrition labels is immature. This paper summarizes the application of biosensors in the analysis of food nutrition labels, including carbohydrate, amino acid, vitamin C, fat and so on, and forecasts its development prospect in food...
Detection of surface water in natural environment via multi-spectral imagery has been widely utilized in many fields, such land cover identification. However, due to the similarity of the spectra of water bodies, built-up areas, approaches based on high-resolution satellites sometimes confuse these features. A popular direction to detect water is spectral index, often requiring the ground truth to...
We consider the problem of reconstructing functions ƒ which are analytic in the open unit disk D from amplitude measurements |ƒ| on the boundary of D and inside of D. It is shown that if ƒ has no singular part then ƒ is uniquely determined by its amplitude on the unit circle and by its amplitude on a circle inside the unit disk. As a special case, the second part of the paper is concerned with the...
Spatial navigation disorder is the earliest and most common manifestation of cognitive impairment. Therefore, the observation of spatial navigation ability can provide a basis for the distinction between normal and mild cognitive impairment patients. At the same time, it can improve the cognitive function and delay the decline of cognitive function in patients with mild cognitive impairment. In the...
Soft-input soft-output (SISO) sphere decoding is applied to multiple-input multi-output (MIMO) systems to offer good bit error rate (BER) performance but at high complexity. To reduce this computational complexity, we propose a novel hybrid enumeration strategy for such decoding that dynamically determines the candidate list; moreover, this strategy uses a new node enumeration based on concentric...
Neural networks are currently popular learning models to represent and analyze data. We address two issues about that in this paper. On the one hand, the parameters between neurons are often restricted to be constants, which greatly limits the learning ability and reduces the robustness of the neural network. For that, it is necessary to make the parameters fuzzy. In this paper, we introduce the fuzzy...
We consider a hybrid eavesdropping wireless system, where the locations of the eavesdroppers are drawn from Poisson point process (PPP). The eavesdroppers work in a half-duplex mode with a certain probability to transfer from eavesdropping mode to jamming mode. Based on the stochastic geometry (SG) and the random matrix theory (RMT), we derive the analytic results for the secrecy outage probability...
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