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Since wireless sensor networks(WSN)consist of a large number of tiny with limited power supply, it becomes a major concert that how to maintain sufficient sensing area. To achieve this goal, the three-dimensional covering problem for WSN is studied. First of all, The related problems of 3D covering control algorithm are described in detail; On this basis, proposed a covering control algorithm in 3D...
This paper addresses the problem of multiple Unmanned Aerial Vehicles (UAVs) cooperative searching for several moving targets with a hybrid method, which is named VFRH. This method is a combination of the virtual force method and the receding horizon method. Its main idea is that the virtual force method is used to help the receding horizon method improve searching efficiencies and reduce the computational...
In recent years the increase of the computational capability and the development of innovative multi-physics techniques has determined a growing interest towards modeling and optimization in engineering system design and green energy applications. In this context, advanced soft computing techniques can be applied by engineers to several problems and used within optimization process, in order to find...
Linear motors tend to be indispensable at present. Whether they are utilize in health service or in automation industry. It is certain that companies is always looking for something ‘more’ and linear motors have it. Therefore the aim of this paper is to find better solution for introduced task. How to achieve higher precision in LMPM position control? How to adjust optimal controller parameters? This...
We introduce the concept of Local Force Closure. We define a local force closure grasp as a grasp which is capable of resisting some given external wrench as well as (through local variation in contact wrenches) any wrench in some neighborhood of the given wrench, with grasp quality exceeding some given threshold. Local force closure is useful in applications where a grasp only needs to resist some...
Current trends in multicore research suggest that hundreds of cores will be integrated on a single chip in the near future for increased performance. This new trend presents a set of challenges, one of which is cache distribution among the cores. Network on chip with homogeneous cache distribution among the routers has become mainstream in literature. In this paper, we propose having a heterogeneous...
We develop methods for accelerating metric similarity search that are effective on modern hardware. Our algorithms factor into easily parallelizable components, making them simple to deploy and efficient on multicore CPUs and GPUs. Despite the simple structure of our algorithms, their search performance is provably sub linear in the size of the database, with a factor dependent only on its intrinsic...
Considering the deficiencies and limitations of Multidimensional Scaling -based (MDS-MAP) localization algorithm, a new MDS-mass spring-based (MDS-MS) localization algorithm was proposed by analyzing the MDS-MAP algorithm and Mass Spring Optimization-based (MSO) positioning algorithm. Moreover, for different ranging error, network connectivity and anchor node density, MDS-MAP, MSO, MDS-MAP(P) and...
Vision based methods provide a powerful technique for accessing swimmer performance. Currently, manual analysis of recorded images is used to determine performance-relevant metrics, which incurs significant time and effort for the analyst. Real-time automated image processing algorithms to measure a swimmer's performance for tumble turns is detailed in this paper. The algorithms yield performance...
Based on a nine-accelerometer configuration, application integral algorithm and logarithmic algorithm to solve angular velocity of gyroscope-free strap down inertial navigation system (GFSINS). Process was derived for solving angular velocity using two kinds of algorithms, and found in experiments the signal of solving angular velocity using logarithmic algorithm can't judge in some cases, then detailed...
This paper presents an efficient MHT implementation, referred to as “GRASP-MHT”, featured in an integration of a greedy randomized adaptive search procedure (GRASP) and a track-oriented MHT framework. The hypothesis generating problem arising in the MHT framework is formulated as a maximum weighted independent set problem, and a GRASP module is designed to generate multiple high-quality hypotheses,...
Given the significance of placement in IC physical design, extensive research studies performed over the last 50 years addressed numerous aspects of global and detailed placement. The objectives and the constraints dominant in placement have been revised many times over, and continue to evolve. Additionally, the increasing scale of placement instances affects the algorithms of choice for high-performance...
Systems with hysteresis present challenges to control designers due to the difficulty in analyzing the effect of hysteresis on the system's behavior. In this paper we propose a novel approach to the analysis of the harmonic content produced by a hysteresis operator when it is subject to a periodic input. The commonly used Prandtl-Ishlinskii (PI) operator is used as an example. In particular, we present...
In this work we present an evaluation of the ability of interpreted and centralized implementation techniques of Petri nets. The main purpose of this work is the analysis of the performance of the Petri Net execution algorithms, comparing the performance of algorithms through a parameter that does not depend on the execution platform. This parameter is the ability of the implementation that is independent...
This paper presents the analysis of grasp stability for a bio-mimetic robot hand by using polygon segmentation algorithm. The presented hand has four independency moving fingers, which are driven by four-coupled link mechanism with two linear actuators. The robot hand was designed considering the dexterity and the compact size suited for various objects in daily life. Tactile sensors are mounted on...
We have proposed a design tool for synthesizing multitier computer networks based on the concept of molecular assembly (MA), where the network's nodes integrate intelligently together by exploiting various forces of attraction existing between the nodes. Three forces are defined and the forces are the distance force, the incoming flow force and the outgoing flow force. Our simulation results demonstrate...
Precision in practical life plays an important role in smooth functioning of all the developed integrated systems. Moving towards the intelligent robotics, accuracy of the results and simplicity of the design proves the efficiency and the applicability of proposed models and algorithms applied. This developed robot works on a much simpler algorithm to estimate the distance of an object by using one...
This paper devotes into the technology of network topology visualization, introduces several current network topology visualization algorithms firstly. Then aimed to the display problem for large size network, puts forward a new network topology visualization algorithm which contains two policies: one is the layer model determined by network characters, another is the dynamic layout process by force-directed...
Herein, a novel, original and artful gravity compensation method, namely, the Auto-Regulation Counterweight method (ARC method) is been proposed and based on the ARC method, a haptic interface device with the well-designed ARC mechanism composed of the counterweight link, the counterweight block, the retarding mechanism and an actuator, is newly designed and implemented. A manipulator of the haptic...
Velocity threshold vmax is an important parameter of Artificial physics optimization. Different from other parameters, it affects the algorithm performance by restricting the moving size and direction of each particle. Because of the complex optimisation problems, the proper vmax setting may provide a reasonable solution within an allowed generation. However, up to now, there are only few scholars...
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