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The cellular networks are expected to change to Multi-hop Cellular Networks (MCNs). While a mobile station and the base station have a direct link in a conventional cellular network, in MCN, mobile stations with unsatisfying path to the base station, could instead relay their data through other mobile stations with better channel conditions. This can improve coverage and capacity, and reduce the total...
The high intensity pulsed electric field is one of the promising technique for the liquid foods sterilization and the pulse-generating circuit is the most critical part. The objective of this research is to obtain the pulse circuit that is more energy efficient and higher sterilization ratio for the liquid food sterilization. Through analyzing several circuits and calculating the equivalent circuit...
In this paper, to cope with parametric uncertainties in the nonlinear dynamical model of a flexible robot arm a Lyapunov based adaptive nonlinear output feedback control strategy directly based on tip position and strain gauge measurements is investigated. Effectiveness and performance of the controller in vibration suppressing and fast motion duration tracking capability is shown through simulation.
The multi-layer temperature was measured in the synthetic ammonia tower by the LM75A temperature sensor, which can exactly adjust temperature in the synthetic ammonia tower, and improve the synthetical rate of ammonia, except for which, reduce cost. The hardware and software system of on-line measuring temperature in the synthetic ammonia tower was designed and debugged. The result was that this system...
Greenhouse environment is a special application of wireless sensor network, efficient real-time monitor and control is the key point. For well solve this problem, this paper researches and designs a Web-based management system with embedded control platform. The system provides a human-based monitor and control platform for the wireless sensor network for greenhouse.
A novel computer graphics and computer aided geometric approach is used for machining a complicated shape workpiece and lettering on a 3D free surface or a plane by adopting a novel 3-DOF(Degree of Freedom) parallel robot. Based on the geometry constraint and dimension-driving technique, a 3-UPRR parallel simulation mechanism and its workspace are created. Then a 3D free surface and a guiding plane...
This paper presents a model for greener power generation to satisfy electricity needs of North-east Sri Lanka (NE-SL). With the absence of indigenous fossil fuel and large-scale hydrologic resources, NE-SL depends on the import of fossil fuel for electricity generation, causing economic and environmental hardships. This paper explores a sustainable power generation using a mix of renewable energy...
The following topics are dealt with: computer engineering; electrical engineering; neural networks; image processing; wind power generation system; learning system; wireless sensor network; cryptography; Web based application; radio networks; computer networks.
Through varying the joints' distribution, all types of an asymmetric parallel robot, i.e. a 2SPR+UPU robot were derived. From the point of application, 15 typical types were found by computer simulation. CAD dimension driving technique was used to solve the workspace and parameters to describe the positional workspace and pose of the moving platform were defined. Positional workspaces, rotational...
In a content distribution network based on overlay networks, the peer's upload bandwidth is always constrained. To optimize the system performance, one problem is how to assign the upload capacity to the right neighbors for transferring data blocks. In a system using network coding technology, a strategy which is to select the right neighbors based upon the degrees of them is proposed. The selection...
In this paper, we present our proposed method of incorporating metadata of Web pages to identify equivalent URLs in addition to the standard URL normalization methodology. The metadata considered are the page size and the body text of Web pages. These metadata can be obtained during HTML parsing in the process of crawling without incurring unnecessary cost. Our experiment shows an accuracy of up to...
To discriminate the quality on traditional Chinese medicines Zi-shen pill real-time, according to the characters of Zi-shen pill finger printer, the basic concepts of rough set are introduced briefly. For rough sets can only deal with discrete data, the discretization of data is the key factor in the rough sets applied in quality assessment, we present a method of discretization based on cluster category...
Chord is known to be limited in routing efficiency since all nodes are on the overlay without considering the underlying network topology. In this paper, a Chord routing algorithm based on limited network layer multicast, called MChord, is proposed, which uses multicast technology to obtain physical neighbor information for routing. Simulation shows that it can shorten network search delay greatly,...
The electromagnetic torque ripple is one of the most important drawbacks of the Direct Torque Control for Induction Motors using Matrix Converters at low speed. This paper investigate the use of multiple voltage vectors of Matrix Converters to reduce the electromagnetic torque ripple which appears when Direct Torque Control technique is used in Induction Motors. The standard look up table for Direct...
This paper introduces a new integrated method for segmenting image which imitates the human observing mechanism. Human firstly pays attention to large objects, then some details, and lastly the concerned details. At the first stage of the algorithm discontinuous edges are detected in the original image, then cut equidistantly to some segmentations, and the end points of segmentations are gathered...
This paper presents an auto-indexing selection technique to improve query processing time under indices' space usage limitation. The technique is composed of two steps: candidate extraction and index selection. In the candidate extraction step, data mining technique called FP-growth is used to find relationships among attributes. Then candidate indices are extracted. By giving space usage constraint...
Compared with traditional anonymous communication systems, the low-latency anonymous communication system can provide more practical services. However, because of its low latency, the anonymity is subject to traffic analysis attack. In this paper, we take Tor, a low-latency anonymous communication network as an example and present an improved algorithm of queue scheduling and resource allocation for...
A method for precision force measurement by using the levitation mass method (LMM) is reviewed. In this method, a mass levitated using a pneumatic linear bearing with sufficiently small friction is made to collide with the object being tested, and the instantaneous value of the impact force is measured as the inertial force acting on the mass. The velocity and acceleration of the mass are measured...
A new extension recognition based on matter-element theory is presented, which can be used to solve the problem of recognition. The application of extension recognition of risks recognition in Internet banking shows its feasibility. In addition, the method enriches the theory of the intelligent disposal of contradiction problems.
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