In this article, implementation of a self-learning fuzzy logic controller (SLFLC) in a form of PLC super block is described. The SLFLC contains a learning algorithm that utilizes a second-order reference model and a s...
详细信息
Osteoarthritis is a chronic and crippling disease affecting an increasing number of people each year. With no known cure, it is expected to reach epidemic proportions in the near future. Accurate segmentation of knee ...
详细信息
ISBN:
(纸本)9780889866461
Osteoarthritis is a chronic and crippling disease affecting an increasing number of people each year. With no known cure, it is expected to reach epidemic proportions in the near future. Accurate segmentation of knee cartilage from magnetic resonance imaging (MRI) scans facilitates the measurement of cartilage volume present in a patient's knee, thus enabling medical clinicians to detect the onset of osteoarthritis and also crucially, to study its effects. This paper presents a fully automated method for segmenting and measuring human tibial cartilage volume from MRI scans. The method uses a global search technique developed by Felzenszwalb [1], involving triangulated polygons as deformable templates to initialise a patch-based active appearance model (PAAM) [2]. The cartilage volume obtained from our automatic method is benchmarked against the current "gold standard" (cartilage volume measured using manual segmentation) as well as other semi-automatic methods. The results obtained are comparable to human manual segmentation.
This paper proposes a recurrent wavelet-based neuro-fuzzy system (RWNFS) with the reinforcement hybrid evolutionary learning algorithm (R-HELA) for solving various control problems. The proposed R-HELA combines the co...
详细信息
This work is concerned with the small signal stability problem in multi-machine systems. By means of H∞ theory, firstly the math model with disturbances is constructed;and secondly, the excitation control law for eac...
详细信息
ISBN:
(纸本)7900719229
This work is concerned with the small signal stability problem in multi-machine systems. By means of H∞ theory, firstly the math model with disturbances is constructed;and secondly, the excitation control law for each generator is designed based on solving Riccati Equation. Finally, simulations performed on 4-machine system shows that the proposed H ∞ method has more advantages over LQR method in both damping ratio and H∞ norm of the corresponding closed-loop system and so can enhance the small signal stability of power system greatly.
In this paper, a discrete stochastic dynamic programming model for the High Speed Downlink Packet Access (HSDPA) downlink scheduler with multi-state Markov channel model is presented. The model then solved numerically...
详细信息
ISBN:
(纸本)9781595938053
In this paper, a discrete stochastic dynamic programming model for the High Speed Downlink Packet Access (HSDPA) downlink scheduler with multi-state Markov channel model is presented. The model then solved numerically (using Markov Decision Process and Dynamic Programming) to find the optimal policy for the case of two users sharing the same cell using a 3-state channel. The optimal policy is the one that maximizes the system throughput while main-taining a level of fairness between users. Simulation is used to study the performance of the resulted optimal policy and compared with Round Robin (RR) scheduler. The effects of the allowable number of channel states and the fairness factor on the optimal policy performance were also studied. Copyright 2007 ACM.
Construction parts consisting of modern composite materials made of carbon fiber reinforced plastic (CFRP) laminates still need to be machined, whereby drill holes are frequently manufactured. Special attention has to...
详细信息
ISBN:
(纸本)0872638529
Construction parts consisting of modern composite materials made of carbon fiber reinforced plastic (CFRP) laminates still need to be machined, whereby drill holes are frequently manufactured. Special attention has to be paid to the machining quality, which implies dimensional accuracy as well as a defect-free peripheral zone. Machining defects often occur as a consequence of excessive mechanical and thermal loads, which are often caused by wrong process conditions or by the wrong choice of machining process itself. With respect to widely used state-of-the-art machine tools providing high performance and equipped with potent control unit, for the comparatively large drill hole, circular milling gains interest as an alternative to the drilling operation assisted by ultrasonic torsional mode vibration cutting. Here, the circular milling process Is compared to the drilling process focusing on the cutting of hole having 6 mm diameter to CFRP laminates. The research work highlights the tool wear, the dimensional accuracy and the defects, which occur in the peripheral zone.
Client-side file caching has long been recognized as a file system enhancement to reduce the amount of data transfer between application processes and I/O servers. However, caching also introduces cache coherence prob...
详细信息
Osteoarthritis is a chronic and crippling disease affecting an increasing number of people each year. With no known cure, it is expected to reach epidemic proportions in the near future. Accurate segmentation of knee ...
详细信息
Osteoarthritis is a chronic and crippling disease affecting an increasing number of people each year. With no known cure, it is expected to reach epidemic proportions in the near future. Accurate segmentation of knee cartilage from magnetic resonance imaging (MRI) scans facilitates the measurement of cartilage volume present in a patient's knee, thus enabling medical clinicians to detect the onset of osteoarthritis and also crucially, to study its effects. This paper compares four model-based segmentation methods popular for medical data segmentation, namely Active Shape Models (ASM) (Cootes et al., 1995), Active Appearance Models (AAM) (Cootes et al., 2001), Patch-based Active Appearance Models (PAAM) (Faggian et al., 2006), and Active Feature Models (AFM) (Langs et al., 2006). A comprehensive analysis of how accurately these methods segment human tibial cartilage is presented. The results obtained were benchmarked against the current "gold standard" (cartilage segmented manually by trained clinicians) and indicate that modeling local texture features around each landmark provides the best results for segmenting human tibial cartilage.
Phase-randomization is an important assumption in many security proofs of practical quantum key distribution (QKD) systems. Here, we present the first experimental QKD with reliable active phase-randomization. A polar...
详细信息
Modeling and simulation tools have been used for helping in the early stages of hardware/software systems design. The DEVS formalism is a technique that enables hierarchical description of discrete event models that c...
详细信息
Modeling and simulation tools have been used for helping in the early stages of hardware/software systems design. The DEVS formalism is a technique that enables hierarchical description of discrete event models that can be used for this task. CD++Builder is an Eclipse plugin that permits defining these applications. We present the main features of the toolkit and its relation to Eclipse libraries and extension points.
暂无评论