检索结果-内蒙古大学图书馆

Variable structure learning automaton network

Electrical engineering in Japan (English translation of Denki Gakkai Ronbunshi) 1999年第1期129卷 39-45页

作者： Qian, Fei Hirata, Hironori Hiroshima Denki Inst. of Technology Japan Chiba University Japan Tokyo Institute of Technology Chiba University Department of Electronic Engineering Hiroshima Denki Inst. of Technology Department of Computer Science IEEE Soc. Instrum. and Contr. Engineers IEICE Faculty of Engineering Chiba University Grad. Sch. of Science and Technology IEEE Soc. Instrum. and Contr. Engineers Info. Proc. Society of Japan

Learning automata select an action from a finite set of their available actions and update their strategy on the basis of response received from the random environment using what is known as a reinforcement sch.me. As an environment changes, the ordering of the actions with performance criterion may vary. If a learning automaton with a fixed strategy is used in such an environment, it may become less expedient with time and even inexpedient. However, using the learning sch.me that has sufficient flexibility to track the better actions makes the performance improved. In this paper, a variable structure learning automaton network with periodic random environment is proposed. The results of some numerical simulations show that our model can be used for tracking some periodic nonstationary environment for which an upper bound on the period is known.

关键词： Learning systems

来源：评论

学校读者我要写书评

暂无评论

Foundation on geogrid-reinforced sand - effect of transient loading

引用

Geotextiles and Geomembranes 1998年第3期16卷 151-160页

作者： Das, B.M. Maji, A. Shin, E.C. Sch. of Eng. and Computer Science California State University Sacramento CA 95819-6023 United States Aimes Group Inc. 809 North Broad Street New Orleans LA 70119 United States Department of Civil Engineering University of Inchon Inchon 402-749 Korea Republic of

Laboratory model test results for the settlement of a square surface foundation supported by geogrid-reinforced sand and subjected to transient load are presented. The tests were conducted with one model foundation at one relative density of compaction using only one type of geogrid. Based on the model test results, it appears that geogrid reinforcement does reduce the settlement of the foundation. The settlement reduction factor is a function of the depth of reinforcement.

关键词： Geomembranes

来源：评论

学校读者我要写书评

暂无评论

Design of a delta-sigma modulated switching power supply

Design of a delta-sigma modulated switching power supply

引用

IEEE International Symposium on Circuits and Systems (ISCAS)

作者： S. Dunlap T. Fiez Sch. of Electr. Eng. & Comput. Sci. Washington State Univ. Pullman WA USA School of Electrical Engineering and Computer Science Washington State University Pullman WA USA

An alternative control solution for a switching power supply using a delta-sigma (/spl Delta//spl Sigma/) modulator in place of a PWM controller is presented. The /spl Delta//spl Sigma/ modulator controller does not exhibit the spikes in the noise spectrum characteristic of the PWM controller. A multi-bit /spl Delta//spl Sigma/ modulator controller reduces the output noise floor below the conventional PWM controller noise floor. While the PWM is shown to have better power transfer efficiency, possible alternatives are suggested to increase the /spl Delta//spl Sigma/ modulator controller efficiency.

关键词： Delta modulation Power supplies Pulse width modulation Circuits Voltage control Switches Frequency Noise reduction Pulsed power supplies Filters

来源：评论

学校读者我要写书评

暂无评论

A simulation study on the performance of integrated switching strategy for traffic management in ATM networks

A simulation study on the performance of integrated switchin...

引用

IEEE Symposium on computers and Communications (ISCC)

作者： Y.A. Sekercioglu A. Pitsillides P. Ioannou Sch. of Inf. Technol. Swinburne Univ. of Technol. Melbourne SA Australia Department of Computer Science University of Cyprus Nicosia Cyprus Department of Electrical Engineering University of Southern California CA USA

Designing effective congestion control strategies for broadband networks is known to be difficult because of the variety of dynamic parameters involved such as link speeds, burstiness of the traffic, and the distances between traffic sources and switching nodes. We propose a traffic management sch.me, which is insensitive to the propagation delay between the sources and switching nodes. We achieve this by combining connection admission control with a bandwidth allocation strategy. By seeking the cooperation of the available bit rate (ABR) sources (to limit their peak cell rate, PCR) at the time of admission of a variable bit rate (VBR) source to the network, the sch.me eliminates the continuous congestion control. Our simulations show that the strategy is able to eliminate the ABR cell losses, achieves effective server and buffer utilization, and provides bounded delays to the VBR traffic (unlike the case without any controls).

关键词： Traffic control Asynchronous transfer mode Communication system traffic control Bit rate Telecommunication traffic Admission control Channel allocation Centralized control Queueing analysis Computational modeling

来源：评论

学校读者我要写书评

暂无评论

Modeling IP-ATM gateway using M/G/1/N queue

Modeling IP-ATM gateway using M/G/1/N queue

引用

IEEE Conference and Exhibition on Global Telecommunications (GLOBECOM)

作者： M. Hassan R. Sarker M. Atiquzzaman Sch. of Comput. Sci. & Software Eng. Monash Univ. Clayton Vic. Australia School of Computer Science Australian Defence Force Academy Canberra ACT Australia Department of Electrical & Computer Engineering University of Dayton Dayton OH USA

Because of the growing investment in both IP and ATM networks, designing efficient IP-ATM gateways for interconnecting these two networks has become very important. One of the main design issues is buffer dimensioning at the gateway for optimum performance. Modeling IP-ATM gateways helps obtaining the optimum design. However, due to very complex nature of an IP-ATM gateway, only models for gateways with infinite buffers have been studied previously. In this paper, an M/G/1/N model for studying the performance of IP-ATM gateway with finite buffers is presented. The performance of the IP-ATM gateway as a function of the buffer size is studied through analysis of the proposed model. The accuracy of the proposed model is verified through simulation.

关键词： Asynchronous transfer mode Virtual colonoscopy Analytical models Integrated circuit interconnections TCPIP computer science Australia Performance analysis Electronic mail Investments

来源：评论

学校读者我要写书评

暂无评论

A token based protocol for integrated packet and circuit switching in WDM rings

A token based protocol for integrated packet and circuit swi...

引用

IEEE Conference and Exhibition on Global Telecommunications (GLOBECOM)

作者： A. Fumagali J. Cai I. Chlamtac Erik Jonsson Sch. of Eng. & Comput. Sci. Texas Univ. Dallas TX USA Emerging Network Solutions Development MCI Telecommunications Corporation Erik Jonsson School of Engineering and Computer Science University of Technology Dallas USA

The paper proposes a networking solution that represents the first step towards the integration of circuit and packet switching techniques directly in the WDM layer, considered to be a fundamental milestone on the way of creating the next generation Internet (NGI). Focusing on ring networks using extant optical devices, the proposed solution allows for the all-optical transmission of individual packets and circuits via a "tell and go" establishment of lightpaths (wavelength routes). The integration of the two alternative switching techniques is obtained by a novel multi-token control protocol shown to maximize bandwidth utilization, minimize latency and scale ideally in the network.

关键词： Protocols Switching circuits Packet switching Optical packet switching Wavelength division multiplexing Next generation networking IP networks Optical devices Wavelength routing Bandwidth

来源：评论

学校读者我要写书评

暂无评论

New approach for removing blocking effects

引用

Chinese Journal of Electronics 1998年第3期7卷 292-295页

作者： Li, Xueming Yuan, Baozong Institute of Information Science Northern Jiaotong University Beijing 100044 China Leningrad Inst. of Rlwy. Engineering Russian Federation Sch. of Electronics and Info. Eng. Institute of Information Science Northern Jiaotong University China IEEE IEEE Computer Society IEE Beijing Center Development China Chinese Institute of Electronics China Univ. of Sci. and Technol. of China Hefei Anhui Province China Beijing Univ. of P. and Telecom. Beijing China

A frequency scramble based approach for removing the blocking effects, which can be applied to conventional discrete cosine transform (DCT)-based transform coding without introducing significant blurring, is proposed. It is very simple and effective and it can be easily realized using available hardware. The blocking effect is less noticeable in the processed images than in the ones using existing filtering techniques. The hardware sch.me which can be used in real time distributions is discussed.

关键词： Image coding

来源：评论

学校读者我要写书评

暂无评论

Applications of abduction: Hypothesis testing of neuroendocrinological qualitative compartmental models

引用

ARTIFICIAL INTELLIGENCE IN MEDICINE 1997年第2期10卷 145-175页

作者： Menzies, T Compton, P Dept. of Artificial Intelligence Sch. of Comp. Sci. and Engineering University of New South Wales Sydney NSW 2052 Australia Dept. of Artificial Intelligence University of New South Wales Sydney NSW 2052 Australia Dept. of Artificial Intelligence Sch. of Computer Science/Engineering University of New South Wales Sydney NSW 2052 Australia

It is difficult to assess hypothetical models in poorly measured domains such as neuroendocrinology. Without a large library of observations to constrain inference, the execution of such incomplete models implies making assumptions. Mutually exclusive assumptions must be kept in separate worlds. We define a general abductive multiple-worlds engine that assesses such models by (i) generating the worlds and (ii) tests if these worlds contain known behaviour. World generation is constrained via the use of relevant envisionment. We describe QCM, a modeling language for compartmental models that can be processed by this inference engine. This tool has been used to find faults in theories published in international refereed journals;i.e. QCM can detect faults which are invisible to other methods. The generality and computational limits of this approach are discussed. In short, this approach is applicable to any representation that can be compiled into an and-or graph, provided the graphs are not too big or too intricate (fanout < 7). (C) 1997 Elsevier science B.V.

关键词： abduction neuroendocrinology hypothesis testing qualitative reasoning

来源：评论

学校读者我要写书评

暂无评论

Valid generalisation from approximate interpolation

引用

Combinatorics Probability and Computing 1996年第3期5.0卷 191-214页

作者： Anthony, Martin Bartlett, Peter Ishai, Yuval Shawe-Taylor, John Department of Mathematics London Sch. of Econ. and Polit. Sci. London WC2A 2AE Houghton Street United Kingdom Department of Systems Engineering Res. Sch. of Info. Sci. and Eng. Australian National University Canberra 0200 Australia Department of Computer Science Technion Haifa 32000 Israel Computer Science Department Royal Holloway University of London Egham Surrey TW20 0EX Egham Hill United Kingdom

Let ℋ and ℓ be sets of functions from domain X to ℝ. We say that ℋ validly generalises ℓ from approximate interpolation if and only if for each η > 0 and ε δ ∈ (0, 1) there is m0(η, ε δ) such that for any fu...

Let ℋ and ℓ be sets of functions from domain X to ℝ. We say that ℋ validly generalises ℓ from approximate interpolation if and only if for each η > 0 and ε δ ∈ (0, 1) there is m₀(η, ε δ) such that for any function t ∈ ℓ and any probability distribution ℘ on X, if m ≥ m₀ then with ℘^m-probability at least 1 - δ, a sample X = (x₁, x₂,...,x_m) ∈ X^m satisfies ∀h ∈ ℋ ιh(x_i) - t(x_i)ι <η, (1 ≤ i ≤m) ⇒ ℘({x :ιh(x) - t(x)ι ≥ η}) < e. We find conditions that are necessary and sufficient for ℋ to validly generalise ℓ from approximate interpolation, and we obtain bounds on the sample length m₀(η ε δ) in terms of various parameters describing the expressive power of ℋ. Copyright ©1996 Cambridge University Press.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Influence of model choice on the calculated reliability of a single pile

引用

International Journal of Offshore and Polar engineering 1996年第2期6卷 91-95页

作者： Lai, W.T. Singh, G. Das, B.M. Department of Civil Engineering University of Leeds Leeds United Kingdom Sch. of Eng. and Computer Science California State University Sacramento CA United States ISOPE

This paper first describes the various models considered and the rationale behind the short-listing of four. It then compares the results of reliability analyses performed using the chosen models and discusses the significance of the differences observed. The reliability analysis is performed with full Monte Carlo simulation. This is followed by recommendations and conclusions.

关键词： Piles

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：