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In this paper, we discuss joint processing (JP) of Coordinated Multi-Point Transmission (CoMP) in high speed railway environment. The differences between public radio communication scenario and the high speed railway scenario are researched, and the feasibility of CoMP in high speed railway scenario is analyzed. Since delay is an important factor in JP, we evaluate the impact of transmission delay...
A rapid path planning adaptive optimization algorithm based on fuzzy neural network is proposed for mobile robot in a static unknown environment. In order to solve the limitations of the subjective experience in the fuzzy control and design problems of path planning, conventional neural network is given fuzzy input signals and fuzzy weights by using the membership function and the error cost function...
A novel complex background suppression based dim point target detection algorithm is presented in this study. Comparing with existing spatial-filter-based background suppression algorithms, the nucleus similarity degree (NSD) of each pixel is analyzed first, then the complex background is predicted by fusing results of two different predictors, and the complex background is removed by subtracting...
Computation of transient and gain bound estimates via a max-plus power method is considered for a class of nonlinear systems that satisfy a nonlinear L2-gain property. In particular, a max-plus power method is developed for solving an auxiliary optimal control problem that captures worst case behaviour with respect to this nonlinear L2-gain property. This auxiliary problem is formulated so as to ameliorate...
Nonlinear L2-gain is a generalization of the conventional (linear) notion of L2-gain in which the linear scaling of input energy is replaced by a nonlinear comparison function scaling. In this paper, this nonlinear L2-gain property is formalized as being strictly weaker than the conventional linear property. This is achieved by appealing to existing results in the literature that demonstrate qualitative...
In this paper a metamaterial electromagnetic (EM) wave absorber with unit cell composed of four circular metallic plates is reported, which can absorbing EM energy at terahertz (THz) frequency with enhanced bandwidth. By properly designing the size of the four plates, the relative bandwidth is increased to 41.3% due to the multi-resonance effect. The performance of the absorber is demonstrated by...
A novel low-power digital baseband controller for Ultra High Frequency (UHF) passive Radio Frequency Identification (RFID) tag is presented in this paper. By analyzing the system design, it is carefully divided into several modules, and it also adopts some advanced low power techniques for system design, based on Electronic Product Code (EPC) Class-1 Generation-2 (C1G2) UHF RFID protocol. The Pulse-interval...
There is an increasing trend in using seawater-source heat pump system (SWHP) in heating and air conditioning systems of commercial and residential buildings in coastal cities in China. This paper established a heat transfer model for casted heat exchanger (CHE) adopted by SWHP systems in winter and summer mode. The CHE was consisted of pipes immersed in the seawater and used for transferring heat...
Optimal control problems that admit closed form solutions are rare so that numerical methods have to be used to obtain an approximate solution in most cases. This paper derives an explicit solution to a class of constrained optimal control problem that arises in the investigation of nonlinear L2-gain properties. The optimal control problem is a nonlinear problem in ℝ2 even for linear systems in ℝ...
Nonlinear L2-gain is a finite gain concept that generalizes the notion of conventional linear L2-gain via the use of nonlinear comparison functions. The computation of tight comparison function bounds for this nonlinear L2-gain property is considered. An approximation framework for these bounds is developed through the formulation of a number of equivalent optimal control problems. A Hamilton-Jacobi-Bellman...
Formation of autonomous mobile robots to an arbitrary geometric pattern in a distributed fashion is a fundamental problem in formation control. This paper presents a new fully distributed, memoryless (oblivious) algorithm to the formation control problem via distributed optimization techniques. The optimization minimizes an appropriately defined difference function between the current robot distribution...
Inhomogeneity exists extensively in many real excitable media. In this paper, we divide the whole space into two parts by a straight line and investigate the effect of two-part inhomogeneity on dynamics of spiral wave by their tip motions. In the test simulation, let the excitable parameters of the two division spaces take different values. Numerical calculation results show that in different domains...
This paper introduces the key techniques of control system for tread production line based on the totally-distributed control structure using fieldbus, industry Ethernet and PLC. Mainly presents the technology process, control system configuration, control strategy, and describes the intelligent adjust algorithm as well.
This paper introduces Affinity Propagation (AP) clustering algorithm, which is intensively researched by some scholars owing to its advantage of fast speed and no need of setting the initial clusters manually. Mainly analyzed the characteristics of Affinity Propagation clustering algorithm at first, and then compared several principle similarity calculating methods based on Euclidean distance and...
Central heating is a key strategy of domestic heating system in China. The enlarging scale and increasing load of steam heating system provides great potentials in optimization of both construction and operation of steam networks. However, it is infeasible to implement big amount of instrumentations in field for industrial experiment and research. Therefore, model and simulation techniques shall be...
This paper proposes two improved lossless data compression schemes based on Lempel-Ziv-Welch coding (LZW) for wireless sensor networks. The schemes preprocess numeric data in different ways to adapt the data characteristics. In order to increase the compression rate, the value span of data is decreased by calculating increment between the sample sequence and the base value. Since the LZW is commonly...
Numerical solution of a class of deterministic optimal stopping problems is considered via a max-plus approach. This max-plus approach is developed via the formalization of an iterative representation for the associated value functions, based on dynamic programming arguments. An implementation issue specific to optimal stopping problems is identified and discussed.
Integral input-to-state stability (iISS) is a robust stability property of interest in the analysis and control of nonlinear dynamical systems affected by external inputs. The computation of tight comparison functions associated with this stability property is useful for assessing robustness in the iISS sense for specific systems. This paper presents a variational characterization of these tight comparison...
The conventional (linear) notion of finite ℒ2-gain has been extensively studied and applied in the analysis and control of both linear and nonlinear dynamical systems over the last few decades. The connection between this finite gain property and dissipation is well-known, and is fundamental to providing a verification mechanism for the property via solution of a related Hamilton-Jacobi-Bellman equation...
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