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Semantic Web services is considered as the concept bringing the web to its full potential by combining the best features of web services, agent technology, grid and the Semantic web. In this paper we present a semantic Web Services platform based on software agent (JASW), which introduces Semantic web and software agent and takes the automated discovery, selection, orchestration and invocation of...
The delay-dependent finite-time H∞ control matter of the uncertain nonlinear neutral time-delayed systems via output feedback is considered. The uncertain disturbance is assumed to energy bounded. By selecting an appropriate Lyapunov function, a finite-time bounded H∞ control criterion is provided for the closed-loop neutral system by the way of the linear matrix inequalities (LMIs). Emulation consequents...
According to the flight path planning problem in dynamic environment, this paper gives a method of analysis. First, the radar threat field based on Voronoi diagram is created, and the track performance indicators established based on radar threat cost and fuel cost. Then the dijkstra algorithm was improved, and the algorithm is used for path planning in dynamic environment‥ Finally, the simulation...
The vibration suppressive control problem is a challenge of flexible-joint space manipulators, which is settled by solving the energy optimal nonlinear control problem in this paper. Based on Legendre pseudo-spectrum method, the nonlinear model of optimal control problem is converted into the corresponding nonlinear programming problem. The complex and difficult two-point boundary value problem is...
The finite-time stabilization problem for a class of neutral time-delay systems is considered. For the energy-bounded disturbance input, the designed state feedback controller can makes the concerned neutral systems finite-time stabilization. By using the constructed Lyapunov functional and linear matrix inequalities techniques, the sufficient condition for the finite-time stabilization is derived...
Under the actual battlefield conditions, due to the impact of the terrain, the weather, and the enemy's intentional interference information, we can not always detect reliable information of the enemy, and can not make the right decisions, so it finally affect the decision maker's strategic intent. To ensure that our UAV obtain reliable information during the air combat, we proposed the method using...
This paper analyzes the operation and control principle of the two transmission technologies, i.e. Line-Commutated Converter-HVDC (LCC-HVDC) and Voltage Source Converter-HVDC (VSC-HVDC) for wind farm integration. It explores the fault ride-through (FRT) capability of the two HVDC under fault conditions according to the characteristics of the two kinds of converters. To ensure satisfactory ride through...
In this paper, a kind of modified adaptive group recommender based on overlapping community detection (GROCD) is proposed. Different from existing recommenders, GROCD takes both of group members' preferences and their complex internal interactions into account. In this research, both of overlapping community integration strategy and contribution-based collaborative filtering are employed to explore...
We represent the polarization dependent loss of graphene placed directly onto silicon waveguides. Graphene introduces 7.7 dB higher losses for TM mode in a 150 µm long waveguide, which is sufficient for an integrated polarizer.
Considering the problem of multi unmanned aerial vehicle (UAV) cooperative tracking multi-UAV formation, a decentralized cooperative tracking control method is presented. Through the establishment of UAV particle motion model and the UAV formation model, the multi-UAV formation tracking motion model by using the consensus algorithm is established, then multi-UAV formation tracking method Based on...
In order to solve problem of path planning for Unmanned Aerial Vehicle (UAV) in dynamic environment, a three-dimensional (3D) path planning algorithm of UAV which Based on improved artificial potential field is proposed in this paper. First, the problem of target unreachable in path planning is solved through the improvement of artificial potential field function. Then the improved algorithm can avoid...
This work examines a straightforward solution to a problem of space surveillance resource allocation by exploring the application of an optimal algorithm to a subset of the general scheduling problem. Due to the resource constraints of the surveillance resource, there could be some serious conflicts among observation requirements. To solve the problem of conflicts in the work of sensor resources allocation,...
In SNS, users with different privacy concern levels exhibit different private information posting behavior. To investigate and contrast the effects of personal and interpersonal influence on private information diffusion for different levels of privacy concern of users, we establish a survival analysis model and examine influence factors, including micro-blog features, user features, and social network...
For cells seeded in scaffolds, transplanted cell survival rate plays an important role for cell transplantation efficiency, and is essential for successful cell transplantation. Fibroblast viability in HyStem-C was examined by a double staining Live/Dead Viability/Cytotoxicity assay, and cell images were analyzed using MetaMorph software for calculating live cell percentage for fresh and cryopreserved...
Under the assumption that the degradation data obey the same path model form, a degradation outlier test method based on path model is presented in this paper. Through testing whether the model parameters are equal for two groups of degradation data, the abnormal data can be distinguished. The critical regions are given based on Chow test. Furthermore, a new analysis method of abnormal degradation...
This paper applies the constant vibration stress accelerated degradation tests to study the effects of random vibration on the parameters stability of quartz flexible accelerometer. Two stress levels of the accelerated degradation test (ADT) are conducted where random vibration spectrum is experienced by accelerometers in the transportation. Then two-step analysis method based on the pseudo life is...
We fabricated and measured low loss polysilicon waveguides deposited using Hot-Wire Chemical Vapor Deposition (HWCVD) at 240°C. The optical propagation loss was measured to be 11.9 dB/cm at λ = 1550 nm.
This paper investigates event-triggered control strategy for the consensus problem of multi-agent systems with time-varying delays. The state of each agent is sampled and transmitted to its neighbors when a certain event condition is satisfied. Two kinds of decentralized event conditions are proposed. Sufficient conditions in terms of Linear Matrix Inequalities (LMIs) are established to ensure the...
In the teaching of information and computing science specialty which was adjusted by the mathematic and applied software specialty which is widespread teachers focus on teaching theory instead of practice, its teaching content and method is relatively backward, teaching methods and evaluation methods does not adapt to training ability and improving innovation. Build the open practice teaching system...
In this paper, we study an event-triggered control algorithm for the output tracking control problem of linear systems. The reference output signal is generated by a known system. First, an event-triggered scheme based on the state error is proposed to guarantee the controlled system asymptotically tracking the reference signal. Then, we also co-design the controller and the parameter of the event,...
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