Functional test sequences were shown to detect unique defects in VLSI circuits. This is thought to be due to the fact that they are applied at-speed. However, functional test sequences do not achieve complete stuck-at...
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Functional test sequences were shown to detect unique defects in VLSI circuits. This is thought to be due to the fact that they are applied at-speed. However, functional test sequences do not achieve complete stuck-at fault coverage. Therefore, scan-hased stuck-at tests, as well as other types of tests, are typically also applied. This increases the amount of test resources required for test application. We describe a procedure for inserting (limited) scan operations into a functional sequence in order to improve its stuck-at fault coverage, thus reducing or eliminating the need for separate scan-based stuck-at tests. Between scan operations, the functional test sequence can still be applied at-speed;however, a higher stuck-at fault coverage is achieved.
A new parallel grasper mechanism having 3-DOF spherical motions is proposed. The mechanism consists of one parallel four-bar chain and four serial sub-chains that are connected in parallel to the four-bar chain. Parti...
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ISBN:
(纸本)0780384636
A new parallel grasper mechanism having 3-DOF spherical motions is proposed. The mechanism consists of one parallel four-bar chain and four serial sub-chains that are connected in parallel to the four-bar chain. Particularly, all joint axes of the mechanism are placed to have a common intersection point securing that all joint motion spaces of the mechanism are confined within the 3-DOF spherical motion spaces. Thus, the mechanism can not only grasp irregular shaped objects by changing configuration of its four-bar chain, but also exhibit 3 DOF spherical motions after grasping. The position analysis and kinematic analysis of the mechanism are performed. Also, its kinematic characteristics are investigated through simulation in aspects of three kinematic design indices. Lastly, a prototype was developed and tested through motion tracking and grasping experiments.
Compression of scanned text document images is important in modern document management, communications and retrieval systems. However, most existing compression techniques have been studied extensively only for docume...
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ISBN:
(纸本)0780386884
Compression of scanned text document images is important in modern document management, communications and retrieval systems. However, most existing compression techniques have been studied extensively only for documents in English or similar alphabet-based languages. In this paper, we purpose a content-lossless sch.me for compression of Chinese text documents. This method utilizes the radical characteristics, which is unique to Chinese characters, to minimize the size of compressed documents. Our method consists of two main parts. The first part is the development of a radical pattern library. The second part is to utilize the radical pattern library to match character patterns in a document. The technique has been tested with many Chinese text document images with good results.
This paper presents a novel radial basis function (RBF) neural network model based on immune recognition principle. This model can choose the number and location of the hidden layer centers by applying the principles ...
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ISBN:
(纸本)0780384032
This paper presents a novel radial basis function (RBF) neural network model based on immune recognition principle. This model can choose the number and location of the hidden layer centers by applying the principles of recognition, memory, learning and self-organized adjustment, and can determine the weights of the output layer by adopting least square algorithm. This novel model is applied to predict the performances of hot-rolled steel bars, and it achieves good effect Simulation results show that this model proposed in the paper has the advantages of less computation and higher precision, compared with the k-means algorithm.
As the Internet grows, traffic engineering has become a widely-used technique to control the flow of packets. For the inter-domain routing, traffic engineering relies on configurations of the Border Gateway Protocol (...
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As the Internet grows, traffic engineering has become a widely-used technique to control the flow of packets. For the inter-domain routing, traffic engineering relies on configurations of the Border Gateway Protocol (BGP). While it is recognized that the misconfiguration of BGP can cause negative effects on the Internet, we consider attack methods that disable traffic engineering regardless of the correctness of configurations. We focus on the redirection of traffic as our attack objective, and present attack scenarios on some dominant sample network topologies to achieve this objective. We also evaluate and validate these attacks using two different discrete-event simulators, one that models BGP behavior on a network, and another that emulates it using direct-execution of working BGP code.
The current paper presents the design, analysis, and implementation of a low-profile resonant dc-to-dc converter that utilizes a coreless printed circuit board transformer as a substitute for the conventional magnetic...
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The current paper presents the design, analysis, and implementation of a low-profile resonant dc-to-dc converter that utilizes a coreless printed circuit board transformer as a substitute for the conventional magnetic core-based transformer. A prototype series resonant converter, fabricated in a 40 mm × 80 mm area with a 4 mm thickness while achieving the maximum efficiency of 85% at a 58 W output power, is used as an example to address the theoretical and practical issues involved in the design, analysis, and implementation of a PCS transformer-based low-profile dc-to-dc converter.
In this paper, Single Crystalline Silicon(SCS) RF MEMS switch for obtaining higher productivity and uniform characteristics compared with conventional metal switch, was designed and fabricated using SiOG(Silicon on Gl...
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In this paper, Single Crystalline Silicon(SCS) RF MEMS switch for obtaining higher productivity and uniform characteristics compared with conventional metal switch, was designed and fabricated using SiOG(Silicon on Glass) process. The characteristics of the fabricated silicon switch were tested. By using SiOG substrate instead of a SOI substrate, fabrication cost can be significantly reduced. The proposed switch is fabricated on CPW(Coplanar Waveguide) and actuated by elec.rostatic force. Measured pull-in voltage was 19 V and 18 samples of measurable 20 samples showed variations less than 15 % on average value of the measured voltages. Forming damping holes on the upper elec.rode led to a relatively fast switching speed. Measured ON and OFF time were 25 μs and 13 μs, respectively. After 108 cycles repeated actuation, stiction problem was not occurred. But contact resistance was changed with about 0.5 to 1 ohm. The RF characteristics of the fabricated switch with 0 to 30 GHz are measured. The isolation and insertion loss measured on the 4 samples were -38 dB to - 39 dB and -0.18 dB to -0.2 dB at 2 GHz, respectively.
Quantum-dot Cellular Automata (QCA) is a novel computing mechanism that can represent binary information based on spatial distribution of elec.ron charge configuration in chemical molecules. It has the potential to al...
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ISBN:
(纸本)1581138539
Quantum-dot Cellular Automata (QCA) is a novel computing mechanism that can represent binary information based on spatial distribution of elec.ron charge configuration in chemical molecules. It has the potential to allow for circuits and systems with functional densities that are better than end of the roadmap CMOS, but also imposes new constraints on system designers. In this paper we develop the first cell-level placement of QCA circuits, where the given circuit is assumed to be partitioned into 4-phase asynchronous QCA timing zones. We formulate the QCA cell placement in each timing zone as a unidirectional geometric embedding of k-layered bipartite graphs. We then present an analytical and a stochastic solution for minimizing the wire crossings and wire length in these placement solutions.
Human facial animation is an interesting and difficult problem in computer graphics. In this paper, a novel B-spline (NURBS) muscle system is proposed to simulate a 3D facial expression and talking animation. The syst...
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ISBN:
(纸本)0769520847
Human facial animation is an interesting and difficult problem in computer graphics. In this paper, a novel B-spline (NURBS) muscle system is proposed to simulate a 3D facial expression and talking animation. The system gets the lip shape parameters from the video, which captures a real person's lip movement, to control the proper muscles to form different phonemes. The muscles are constructed by the non-uniform rational B-spline curves, which are based on anatomical knowledge. By using different number of control points on the muscles, more detailed facial expression and mouth shapes can be simulated. We demonstrate the flexibility of our model by simulating different emotions and lip-sync to a video with a talking head using the automatically extracted lip parameters.
An IC for acquisition of 16 elec.rophysiology signals in mice is described. Each channel includes programmable gains from 10 to 1000, a 7 kHz low-pass 4th-order Butterworth filter and a sample and hold. Simulations pr...
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ISBN:
(纸本)0780383699
An IC for acquisition of 16 elec.rophysiology signals in mice is described. Each channel includes programmable gains from 10 to 1000, a 7 kHz low-pass 4th-order Butterworth filter and a sample and hold. Simulations predict 14-bit accuracy up to 7 kHz. The integrated noise from 1 Hz to 7 kHz is 1.9 μV/Hz1/2. The +/-0.3V dc input offset of each channel is cancelled with 7-bit DACs controlling the bulk of the first opamp input transistors and 6-bit DACs on the 2nd stage. Total power dissipation is 13.5 mW using a 3V supply. Die area is 6 mm2 in a 0.25μ. process.
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