This paper presents a general overview of the technological fields of mechatronic, robotic, components for automation and control. Five technical areas are considered: component and instruments, mechatronic, robotics,...
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This paper presents a general overview of the technological fields of mechatronic, robotic, components for automation and control. Five technical areas are considered: component and instruments, mechatronic, robotics, cost oriented automation and human-machine systems. The paper addresses their current key problems and the recent major accomplishments. At last the most promising forecasted development and applications are considered.
Inherent asymmetry in the tunneling barriers of few-electron quantum dots induces intrinsically different tunneling currents for forward and reverse source-drain biases in the nonlinear transport regime. We demonstrat...
Inherent asymmetry in the tunneling barriers of few-electron quantum dots induces intrinsically different tunneling currents for forward and reverse source-drain biases in the nonlinear transport regime. We demonstrate that in addition to spin selection rules, overlap matrix elements between many-body states are crucial for the correct description of tunneling transmission through quantum dots at large magnetic fields. Signatures of excited (N−1)-electron states in the transport process through the N-electron system are clearly identified in the measured transconductances. Overall, the computed current spectra are found to be in very good agreement with the experimental data.
Many applications of computer network such as videoconferencing will involve multiple users that will rely on the ability of the network to provide multicast services. It has recently attracted a lot of attention in t...
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Many applications of computer network such as videoconferencing will involve multiple users that will rely on the ability of the network to provide multicast services. It has recently attracted a lot of attention in the design of multicast routing protocol for ad hoc mobile network. Routing protocols used in conventional wired networks are not suited to the mobile environment due to the considerable overhead produced by periodic route update messages and their slow convergence to topological changes. Most of the proposed routing algorithms require maintaining a global network state at each node. The global state is always an approximation of the current network state due to the non-negligible delay of propagating local state. As the network size grows, the imprecision of global state and the storage and communication overhead increase. The imprecision of global state information and the high storage and communication overhead make those algorithms do not scale well. We propose a scalable and loop-free distributed cluster multicast QoS routing algorithm, which requires every node to maintain only its local state and uses physical location information provided by positioning devices in route discovery and route maintenance. In our protocol, the whole network is partitioned into several squares called zones or clusters. In each cluster, we first use a cluster head selection algorithm to select a cluster head and then use a gateway selection algorithm to select gateways to communicate with neighbor cluster heads. After the construction of cluster heads and gateway nodes, it uses a distributed computation to collectively utilize the most up-to-date local state information to find multicast tree in a hop-by-hop-basis. The performance of our algorithm was studied through extensive simulation. The simulation results reveal that it has a much better performance and lower route discovery traffic than other algorithm.
In this study, we present an image contrast enhancement method based on block-wise intensity pair distribution. The proposed algorithm takes the local intensity-pair distribution, instead of using the intensity-pair d...
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Energy saving control is desirable for magnetically levitated (MAGLEV) vehicles. Hybrid magnets controlled with zero power control system was able to reduce the exciting power. But such a conventional system needed to...
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Energy saving control is desirable for magnetically levitated (MAGLEV) vehicles. Hybrid magnets controlled with zero power control system was able to reduce the exciting power. But such a conventional system needed to feed bipolar current and then the excitation system was complicated. To achieve a simple excitation system, a hybrid magnet with permanent magnets and divided cores was made. The magnet was a salient-pole type magnet and the poles were placed in two rows. Each pole of the iron cores was equipped with a coil to control both levitation force and lateral damping force. The coils of one side of the divided core were excited with a direct current driver so as to produce the same polarity as the permanent magnet and the others were excited the opposite polarity. The two sets of the coils were excited with direct current drivers each of which had one IGBT. The system needed only two IGBTs per magnet while the conventional zero power systems needed four IGBTs per magnet. According to our test results, the energy consumption was very small and the levitation part was able to start levitating from both upper and lower touch-down positions. In this paper, the characteristics of the proposed excitation system are shown.
New binary codes that compress a pulse to a width of several chips are proposed. The proposed binary codes are surveyed by computers up to code length 50. It is found that the peak-sidelobe to peak-mainlobe ratio for ...
New binary codes that compress a pulse to a width of several chips are proposed. The proposed binary codes are surveyed by computers up to code length 50. It is found that the peak-sidelobe to peak-mainlobe ratio for the proposed binary codes is smaller than that of conventional binary codes. Furthermore, the bandwidth characteristic and the Doppler characteristic for the proposed binary codes are evaluated. As a result, we have confirmed that characteristics of the proposed binary codes are better than those of the conventional codes.
A genetic algorithm (GA) is an optimization algorithm that simulates the hereditary phenomenon of natural life. Although GA has been applied to image processing, it has not been studied to apply for matching hand gest...
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ISBN:
(纸本)9784901122078
A genetic algorithm (GA) is an optimization algorithm that simulates the hereditary phenomenon of natural life. Although GA has been applied to image processing, it has not been studied to apply for matching hand gesture images. In this paper, a method to use GA for the matching process of hand gesture images expressing numbers is proposed. The processing algorithm including GA for hand gesture images is evaluated experimentally by changing the parameters of GA. It is shown that each person can be distinguished from other persons by the fitness value of GA. Hand gesture images to express each number are used for evaluation. Next, the personal identification to search the most suitable hand gesture image in the database of hand gesture images by using GA is proposed and evaluated experimentally. As a result, the effectiveness of the proposed method using GA for matching hand gesture images and identifying each person is confirmed.
Web Intelligence (WI) is a new and active research field in current AI and IT. Intelligent B2C Portals are an important research topic in WI. In this paper, we first investigate and analyze the architecture of a B2C p...
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In this paper we propose a new, fault tolerant on-line EPS. After the analysis of all the possible failure scenarios, for each case we propose solutions based on roll-back and recovery mechanism (repetitions, time-out...
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In this paper we propose a new, fault tolerant on-line EPS. After the analysis of all the possible failure scenarios, for each case we propose solutions based on roll-back and recovery mechanism (repetitions, time-out, acknowledge messages, logs, resending, synchronizations). Based on the Monte-Carlo method, we realized a simulation of system behavior, in order to obtain the EPS's correct service rate vs. the messages loss rate between client-bank and shop-bank. Based on this simulation we concluded the increase of the success rate of transactions in the fault tolerant case vs. the un-tolerant case.
In case we intend to make use of Hurst parameter H in real time, fast derivation of H becomes a practical requirement. We propose an algorithm to reduce the calculation cost of the cumulative range in an R/S analysis....
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In case we intend to make use of Hurst parameter H in real time, fast derivation of H becomes a practical requirement. We propose an algorithm to reduce the calculation cost of the cumulative range in an R/S analysis. By installing our algorithm we*could reduce the II derivation time less than one second at reasonable data sizes, which provides real time applicability.
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