On the Design of Nonlinear Neural Networks for Associative Memories

ＯｎｔｈｅＤｅｓｉｇｎｏｆＮｏｎｌｉｎｅａｒＮｅｕｒａｌＮｅｔｗｏｒｋｓｆｏｒＡｓｏｃｉａｔｉｖｅＭｅｍｏｒｉｅｓＸｕＳｈｕｎｄｏｕ（ＤｅｐａｒｔｍｅｎｔｏｆＢａｓｉｃＣｏｕｒｓｅｓ，ＳｈｉｊｉａｚｈｕａｎｇＰｏｓｔａｌＣｏｌｅｇｅ，Ｓｈｉｊｉａｚｈ...     

Congestion Control for ATM Networks Based on Diagonal Recurent Neural Networks

ＣｏｎｇｅｓｔｉｏｎＣｏｎｔｒｏｌｆｏｒＡＴＭＮｅｔｗｏｒｋｓＢａｓｅｄｏｎＤｉａｇｏｎａｌＲｅｃｕｒｅｎｔＮｅｕｒａｌＮｅｔｗｏｒｋｓＨｕａｎｇＹｕｎｘｉａｎＹａｎＷｅｉ（ＡｉｒＦｏｒｃｅＩｎｓｔｉｔｕｔｅｏｆＭｅｔｅｏｒｏｌｏｇｙ，Ｎａｎｊｉｎｇ...     

Intelligent Flow Control Technique of ABR Service in ATM Networks Based on Fuzzy Neural Networks

ＩｎｔｅｌｉｇｅｎｔＦｌｏｗＣｏｎｔｒｏｌＴｅｃｈｎｉｑｕｅｏｆＡＢＲＳｅｒｖｉｃｅｉｎＡＴＭＮｅｔｗｏｒｋｓＢａｓｅｄｏｎＦｕｚｚｙＮｅｕｒａｌＮｅｔｗｏｒｋｓ①ＺｈａｎｇＬｉａｎｇｊｉｅＬｉＹａｎｄａＬｉＱｉｎｇｈｕａＷａｎｇＰｕ（ＤｅｐｔｏｆＡ...     

Analysis of Crosstalk Induced by Optical Cross-Connection in Multiwavelength Networks

ＡｎａｌｙｓｉｓｏｆＣｒｏｓｔａｌｋＩｎｄｕｃｅｄｂｙＯｐｔｉｃａｌＣｒｏｓ－ＣｏｎｎｅｃｔｉｏｎｉｎＭｕｌｔｉｗａｖｅｌｅｎｇｔｈＮｅｔｗｏｒｋｓＳｈｅｎＸｉａｏａｎｄＹｅＰｅｉｄａ（ＢｅｉｊｉｎｇＵｎｉｖｅｒｓｉｔｙｏｆＰｏｓｔｓａｎｄＴｅｌｅｃ...     

Criterion Theorems of Set Valued Martingales With Values in a Banach Space

ＣｒｉｔｅｒｉｏｎＴｈｅｏｒｅｍｓｏｆＳｅｔＶａｌｕｅｄＭａｒｔｉｎｇａｌｅｓＷｉｔｈＶａｌｕｅｓｉｎａＢａｎａｃｈＳｐａｃｅＸｕＳｈｕｎｄｏｕ（ＤｅｐａｒｔｍｅｎｔｏｆＢａｓｉｃＣｏｕｒｓｅｓ，ＳｈｉｊｉａｚｈｕａｎｇＰｏｓｔａｌＣｏｌｌｅｇｅＳｈ...     

A Video Coding Algorithm Based on Intraframe and Interframe Joint Prediction of Wavelet Coefficients

ＡＶｉｄｅｏＣｏｄｉｎｇＡｌｇｏｒｉｔｈｍＢａｓｅｄｏｎＩｎｔｒａｆｒａｍｅａｎｄＩｎｔｅｒｆｒａｍｅＪｏｉｎｔＰｒｅｄｉｃｔｉｏｎｏｆＷａｖｅｌｅｔＣｏｅｆｉｃｉｅｎｔｓＺｈａｎｇＸｕｄｏｎｇＷａｎｇＤｅｓｈｅｎｇＰｅｎｇＹｉｎｇｎｉｎｇ（Ｔｓｉｎ...     

A New Backup-VP Priority Restoration Methodfor ATM Survival Networks

ＡＮｅｗＢａｃｋｕｐ－ＶＰＰｒｉｏｒｉｔｙＲｅｓｔｏｒａｔｉｏｎＭｅｔｈｏｄｆｏｒＡＴＭＳｕｒｖｉｖａｌＮｅｔｗｏｒｋｓＣｈｅｎＳｈａｎｚｈｉ；ＣｈｅｎｇＳｈｉｄｕａｎａｎｄＣｈｅｎＪｕｎｌｉａｎｇ（ＳｔａｔｅＫｅｙＬａｂｏｒａｔｏｒｙｏｆＳｗｉｔｃ...     

In situ Measurement of YBa_2 Cu_3O_(7-δ) Film Thickness and Growth Temperature by Pyrometric Absorption Method

ＩｎｓｉｔｕＭｅａｓｕｒｅｍｅｎｔｏｆＹＢａ２Ｃｕ３Ｏ７－δＦｉｌｍＴｈｉｃｋｎｅｓａｎｄＧｒｏｗｔｈＴｅｍｐｅｒａｔｕｒｅｂｙＰｙｒｏｍｅｔｒｉｃＡｂｓｏｒｐｔｉｏｎＭｅｔｈｏｄＸ．Ｍ．ＸｉｏｎｇＹ．Ｌ．ＺｈｏｕＨ．Ｓ．ＷａｎｇＤ．Ｆ．ＣｕｉＨ．Ｂ...     

Spatiotemporal Chaotic Synchronization and Spread-Spectrum Communication

ＳｐａｔｉｏｔｅｍｐｏｒａｌＣｈａｏｔｉｃＳｙｎｃｈｒｏｎｉｚａｔｉｏｎａｎｄＳｐｒｅａｄ－ＳｐｅｃｔｒｕｍＣｏｍｍｕｎｉｃａｔｉｏｎ￥ＸｉａｏＪｉｎｇｈｕａ（ＤｅｐａｒｔｍｅｎｔｏｆＢａｓｉｃＳｃｉｅｎｃｅ，ＢｅｉｊｉｎｇＵｎｉｖｅｒｓｉｔｙｏｆＰ...     

Magneto－optic Current Sensor Based on Total Reflections in a Quadrangular Bulk Glass

Ｍａｇｎｅｔｏ－ｏｐｔｉｃＣｕｒｒｅｎｔＳｅｎｓｏｒＢａｓｅｄｏｎＴｏｔａｌＲｅｆｌｅｃｔｉｏｎｓｉｎａＱｕａｄｒａｎｇｕｌａｒＢｕｌｋＧｌａｓｓ￥ＣＨＥＮＸｉｋｕｎ；ＱＩＵＪｉｎｇｈｅ；ＺＨＵＱｉｂｉａｏ；ＤＡＩＬａｉｆａ（ＳｈａｎｇｈａｉＵｎｉｖ...     

ATM基于神经模糊算法的呼叫接入控制

本文研究 ＡＴＭ通信网络基于在线测量的呼叫允许接入控制问题。文章提出利用神经－模糊算法在线协调模糊规则中的参数，并在此基础上，实现了一种新的ＣＡＣ机制。在确保服务质量的情况下，提高网络资源利用率，通过实例仿真表明了应用此种算法的可行性。     

移动多媒体网络中呼叫接纳控制算法的研究综述

呼叫接纳控制是多媒体移动通信网络中无线资源管理的重要部分,它的有效性直接关系到用户服务质量是否能够得到保证,并且决定了系统资源的利用效率。在仿真实验数据分析的基础上通过对目前已有的呼叫接纳控制方面的研究成果进行了归纳、总结,以期得出适合于无线移动多媒体网络的呼叫接纳控制算法。     

QoS Provisioning in Wireless/Mobile Multimedia Networks Using an Adaptive Framework

Recently there is a growing interest in the adaptive multimedia networking where the bandwidth of an ongoing multimedia call can be dynamically adjusted. In the wireless/mobile multimedia networks using the adaptive framework, the existing QoS provisioning focused on the call blocking probability and the forced termination probability should be modified. We, therefore, redefine a QoS parameter – the cell overload probability – from the viewpoint of the adaptive multimedia networking. Then, we propose a distributed call admission control (CAC) algorithm that guarantees the upper bound of the cell overload probability. Also, a bandwidth adaptation algorithm which seeks to minimize the cell overload probability is also presented. Simulation experiments are carried out to verify the performance of the proposed CAC algorithm. Furthermore, the performance of the adaptive wireless/mobile network is compared to that of the existing non-adaptive wireless/mobile networks. As a further step in QoS provisioning, we propose another QoS parameter, the degradation period ratio, and discuss analytically how the CAC algorithm guarantees the upper bound of the degradation period ratio.     

ATM网络中带有接入平衡机制的实时CAC算法

本文介绍的CAC算法旨在使各种业务的呼叫能够平衡地接入ATM网络,降低算法的复杂程度,提高对呼叫的实时处理能力,同时提高网络资源的利用率。     

Non-Uniform Traffic Issues in DCA Wireless Multimedia Networks

Wireless networks that utilize dynamic channel allocation (DCA) are known to perform better than those with fixed channel allocation, in terms of the call level QoS measures such as the handoff dropping probability. On account of this, the DCA networks are usually designed without the call admission control (CAC). However, given the decrease of cell sizes, together with ever increasing mobile phone and terminal population, dynamic channel allocation policies (such as channel borrowing) may not be sufficient to cope with the hot-spot area size and its traffic intensity. This paper analyses the performance of the DCA networks, both with and without the call admission control, under the hot-spot traffic regime. In such cases, the pure DCA approach fails to ensure sufficiently low level of QoS in both the hot-spot area and the surrounding cells. We propose a CAC policy that can stabilize the QoS under non-uniform traffic, whilst being easy to integrate in the distributed DCA policies.     

一种优化无线多媒体业务接入允许控制和资源分配算法

无线网络中的多媒体业务具有很大吸引力。本文将多媒体业务分为实时业务和非实时业务,提出了一种呼叫接入控制优化算法CAC-RA,此算法通过采用马尔科夫方法,排队论和非线性规划模型,同时解决呼叫允许控制和资源优化分配问题。提出的利益函数考虑了最大利用资源,同时满足无线网络各类用户的QoS要求,同时尽量减少用户的资源重新分配的频率和幅度变化,仿真实验数据显示CAC-RA算法能较好地适应业务变化的网络,同时实现了较为理想的利益值,满足无线网络多媒体用户的QoS要求。     

Call admission control for non‐geostationary orbit satellite networks and other capacity‐varying networks

Many networks, such as non‐geostationary orbit satellite (NGOS) networks and networks providing multi‐priority service using advance reservations, have capacities which vary over time for some or all types of calls carried on these networks. For connection‐oriented networks, call admission control (CAC) policies which only use current capacity information may lead to excessive and intolerable dropping of admitted calls whenever the network capacity decreases. Thus novel CAC policies are required for these networks. We present the admission limit curve (ALC) and prove it is a constraint limiting the conditions under which any causal CAC policy may admit calls and still meet call dropping guarantees on an individual call basis. The ALC also leads to a lower bound on the call blocking performance achievable by any causal CAC policy which provides dropping guarantees to individual calls. Also, we introduce a new CAC policy which uses knowledge of future capacity changes to provide dropping guarantees on an individual call basis and which achieves blocking performance close to the lower bound. Copyright © 2000 John Wiley & Sons, Ltd.     

Estimation of the cell loss ratio in ATM networks with a fuzzysystem and application to measurement-based call admission control

An important parameter in asynchronous transfer model (ATM)-based network design and management is the cell loss ratio (CLR) in ATM multiplexers. It is a key parameter to many vital functions in the network such as call admission control (CAC), bandwidth allocation, etc. However, the CLR depends usually on many unknown and unpredictable traffic parameters such as input traffic correlations. In this paper, we propose a simple and robust fuzzy-based algorithm to predict the CLR in large-sized systems based on both a small amount of information from small-sized systems, and the asymptotic behavior for very large systems. Unlike the model-based approaches, our approximation avoids the problem of assuming any traffic parameters or arrival process. This algorithm is used with real-time traffic measurement to propose an effective measurement-based call admission control framework for ATM networks     

Call Admission Policies Based on Calculated Power Control Setpoints in SIR-Based Power-Controlled DS-CDMA Cellular Networks

In this paper, we develop call admission control algorithms for SIR-based power-controlled DS-CDMA cellular networks. We consider networks that handle both voice and data services. When a new call (or a handoff call) arrives at a base station requesting for admission, our algorithms will calculate the desired power control setpoints for the new call and all existing calls. We will provide necessary and sufficient conditions under which the power control algorithm will have a feasible solution. These conditions are obtained through deriving the inverse of the matrix used in the calculation of power control setpoints. If there is no feasible solution to power control or if the desired power levels to be received at the base station for some calls are larger than the maximum allowable power limits, the admission request will be rejected. Otherwise, the admission request will be granted. When higher priority is desired for handoff calls, we will allow different thresholds (i.e., different maximum allowable power limits) for new calls and handoff calls. We will develop an adaptive algorithm that adjusts these thresholds in real-time as environment changes. The performance of our algorithms will be shown through computer simulation and compared with existing algorithms.     

神经网络在ATM流量控制中的应用

以ATM流量控制的三层结构模型为基础，介绍神经网络在接入允许控制（CAC）中的五种算法——学习控制方法、hybrid允许方法、移动窗口训练方法，BPHT算法和时间-差分学习方法。讨论基于神经网络的流量测量、流量管理和拥塞控制方法。性能分析结果表明神经网络提供了快速、自适应、简单的智能控制。