In this paper we present measurement of eye patterns and their analysis for InGaP/GaAs DHBTs between 1 and 3 Gb/s PRBS signal. Eye diagrams have been measured and also simulated for comparison and further analysis. By...
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In this paper we present measurement of eye patterns and their analysis for InGaP/GaAs DHBTs between 1 and 3 Gb/s PRBS signal. Eye diagrams have been measured and also simulated for comparison and further analysis. By adopting a robust direct parameter extraction technique all the small signal parameters of the DHBTs are deduced and are then used to simulate the corresponding eye patterns. The necessary procedure for simulating eye patterns is established in ADS so as the extraction of important eye parameters such as the eye height, amplitude, signal to noise ratio, rise and fall times. The eye parameters deteriorate with increase in frequency leading to the closure of the eye. An attempt has been made to recognise the main physical parameters of the device which influence the shape and formation of the eye diagrams and the observations has been discussed in this paper. These results provide an insight into device optimisation for user specified eye diagrams.
The paper reports on a tactile force sensor for the dimensional metrology of deep narrow drillings. The sensor consists of an up to 7-mm-long cantilever with a width of 150 μm suspended by a thin silicon membrane hin...
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The paper reports on a tactile force sensor for the dimensional metrology of deep narrow drillings. The sensor consists of an up to 7-mm-long cantilever with a width of 150 μm suspended by a thin silicon membrane hinge comprising an implanted piezoresistive stress sensor. The device is microstructured using deep reactive etching of single-crystal silicon. A quadratic p-well with four peripheral p{sup}+-contacts serves as stress sensor element. To investigate and improve the stress sensitivity of these elements, 90×90 μm{sup}2 p-wells comprising non-conducting islands of different sizes were implemented. In comparison to sensor elements without island, the introduction of a non-conducting region of 60×60 μm{sup}2 improves the sensitivity by 41% consistent with Finite Element simulations. Depending on the size of the island, force sensitivities between 7.74 mV/V/mN and 10.9 mV/V/mN were achieved.
The definition, characteristics and mathematical model of pseudo-stochastic pulses utilized in reduced-dynamic orbit determination are systematically analyzed. With the help of the real onboard GPS observations from s...
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The definition, characteristics and mathematical model of pseudo-stochastic pulses utilized in reduced-dynamic orbit determination are systematically analyzed. With the help of the real onboard GPS observations from spaceborne receiver on CHAMP satellite, the stochastic pulses are estimated with different force models and observations of different types, and the variation of stochastic pulses in different cases and adjust impact of pulses on orbit accuracy are analyzed in detail. The results show that the sizes of stochastic pulses mainly depends on the force models, whether estimating experience parameters or not and accuracy of observations used. In the cases of relatively big model errors, the set of stochastic pulses can efficiently compensate or absorb the impacts of model errors, so the orbit accuracy can be improved accordingly.
In this paper we present a study on the requirements for the design and implementation of simulation packages for Grid systems. Grids are emerging as new distributed computing systems whose main objective is to manage...
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In this paper we present a study on the requirements for the design and implementation of simulation packages for Grid systems. Grids are emerging as new distributed computing systems whose main objective is to manage and allocate geographically distributed computing resources to applications and users in an efficient and transparent manner. Grid systems are at present very difficult and complex to use for experimental studies of large-scale distributed applications. Although the field of simulation of distributed computing systems is mature, recent developments in large-scale distributed systems are raising needs not present in the simulation of the traditional distributed systems. Motivated by this, we present in this work a set of basic requirements that any simulation package for Grid computing should offer. This set of functionalities is obtained after a careful review of most important existing Grid simulation packages and includes new requirements not considered in such simulation packages. Based on the identified set of requirements, a Grid simulator is developed and exemplified for the Grid scheduling problem.
作者：
Kwang-Hyun ParkZeungnam BienDivision of EE
Department of EECS Korea Advanced Institute of Science and Technology 373–1 Kusong-dong Yusong-gu Taejon 305–701 Korea. Zeungname Bien:received the B.S. degree in electronics engineering from Seoul National University
Seoul Korea in 1969 and the M.S. and Ph.D. degrees in electrical engineering from the University of Iowa Iowa City Iowa U.S.A. in 1972 and 1975 respectively. During 1976–1977 academic years he taught as assistant professor at the Department of Electrical Engineering University of Iowa. Then Dr. Bien joined Korea Advanced Institute of Science and Technology summer 1977 and is now Professor of Control Engineering at the Department of Electrical Engineering and Computer Science KAIST. Dr. Bien was the president of the Korea Fuzzy Logic and Intelligent Systems Society during 1990–1995 and also the general chair of IFSA World Congress 1993 and for FUZZ-IEEE99 respectively. He is currently co-Editor-in-Chief for International Journal of Fuzzy Systems (IJFS) Associate Editor for IEEE Transactions on Fuzzy Systems and a regional editor for the International Journal of Intelligent Automation and Soft Computing. He has been serving as Vice President for IFSA since 1997 and is now Chief Chairman of Institute of Electronics Engineers of Korea and Director of Humanfriendly Welfare Robot System Research Center. His current research interests include intelligent control methods with emphasis on fuzzy logic systems service robotics and rehabilitation engineering and large-scale industrial control systems. Kwang-Hyun Park:received the B.S.
M.S. and Ph.D. degrees in electrical engineering and computer science from KAIST Korea in 1994 19997 and 2001 respectively. He is now a researcher at Human-friendly Welfare Robot System Research Center. His research interests include learning control machine learning human-friendly interfaces and service robotics.
It has been found that some huge overshoot in the sense of sup-norm may be observed when typical iterative learning control (ILC) algorithms are applied to LTI systems, even though monotone convergence in the sense of...
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It has been found that some huge overshoot in the sense of sup-norm may be observed when typical iterative learning control (ILC) algorithms are applied to LTI systems, even though monotone convergence in the sense of λ-norm is guaranteed. In this paper, a new ILC algorithm with adjustment of learning interval is proposed to resolve such an undesirable phenomenon, and it is shown that the output error can be monotonically converged to zero in the sense of sup-norm when the proposed ILC algorithm is applied. A numerical example is given to show the effectiveness of the proposed algorithm.
The concept of multidimensionality allows to specify contrary variants of a content object on a common, abstract level. This prevents redundancy, simplifies the maintenance and increases the adaptability of content. T...
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The concept of multidimensionality allows to specify contrary variants of a content object on a common, abstract level. This prevents redundancy, simplifies the maintenance and increases the adaptability of content. This is crucial for automated cross media delivery. Though some implementations of multidimensional document systems are available, existing formalisms do not yet cover this concept. This article presents the multidimensional extension of a document algebra, as well as a reference implementation of this algebra in an authoring tool. The algebraic approach is a valuable basis for interoperability of formats and tools in order to realize the whole content workflow in cross media publishing
Along with the increasing diversity of educational markup languages there is a strong need for flexible integration of such content into learning platforms. Therefore, we have identified four basic mechanisms: plain l...
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作者：
Voigt, SebastianUniversity of Hannover
Faculty of Electrical Engineering and Computer Science Institute for Systems Engineering - Computer Architecture and Operating Systems Appelstr. 4 30167 Hannover Germany
Virtual rooms and common information spaces are being used more and more frequently. In addition to internet-based solutions, ad-hoc InfoSpaces have been proposed. Their security has not been sufficiently investigated...
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ISBN:
(纸本)9783885791874
Virtual rooms and common information spaces are being used more and more frequently. In addition to internet-based solutions, ad-hoc InfoSpaces have been proposed. Their security has not been sufficiently investigated. This paper proposes a new protocol for peer-to-peer data exchange with support for access control for operations in the virtual rooms. Access rights for operations are kept in access control matrices and the security layer allows only operations from clients which are marked as allowed in the access control matrix. The protocol is based on the idea of hiding the identity of all peer-to-peer participants. Thus this protocol offers anonymity and full peer-to-peer support using asymmetric cryptography to distribute the access control matrices. This works without any central authority.
The development of the WPA and IEEE 802.11i standards have vastly improved the security of common wireless LAN setups. However, many installations still use the broken WEP protocol or even run with no security setting...
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