Multi-agent system application in accordance with game theory in bi-directional coordination network model

The multi-agent system is the optimal solution to complex intelligent problems. In accordance with the game theory, the concept of loyalty is introduced to analyze the relationship between agents' individual income and global benefits and build the logical architecture of the multi-agent system. Besides, to verify the feasibility of the method, the cyclic neural network is optimized, the bi-directional coordination network is built as the training network for deep learning, and specific training scenes are simulated as the training background. After a certain number of training iterations, the model can learn simple strategies autonomously. Also,as the training time increases, the complexity of learning strategies rises gradually. Strategies such as obstacle avoidance, firepower distribution and collaborative cover are adopted to demonstrate the achievability of the model. The model is verified to be realizable by the examples of obstacle avoidance, fire distribution and cooperative cover. Under the same resource background, the model exhibits better convergence than other deep learning training networks, and it is not easy to fall into the local endless loop.Furthermore, the ability of the learning strategy is stronger than that of the training model based on rules, which is of great practical values.

Design and Implementation of A Bi-Directional Proxy Server

In this paper, a mechanism of bi-directional proxy is proposed, which supports authentication based on identity, and endue different users with different network access permissions. This technology is purposed with a new idea towards the implementation of network security, which has a promising future in applications. Key words network security - firewall - bi-directional proxy server - identity authentication CLC number TP 368.5 Foundation item: Supported by the National Natural Science Foundation of China (60173051), The National Research Foundation for the Doctoral Program of Higher Education of China (20030145029). Teaching and Research Award Program for Outstanding Young Teachers in Higher Education Institution of the Ministry of Education; National 863 High-tech Program (2003AA414210)Biography: GAO Fu-xiang (1961-), male, Professor, Master, research direction: computer network security.

Regenerative Strategy for Sum-rate Enhancement in Bi-directional Three-node Cooperation

In bi-directional three-node cooperation, one regenerative strategy with network coding and power optimization is proposed for system sum-rate under a total energy constraint. In this paper, the network coding and power optimization are applied to improve system sum-rate. But max-rain optimization problem in power allocation is a NP-hard problem. In high Signal-to-Noise Ratio regime, this NP-hard problem is transformed into constrained polynomial optimization problem, which can be computed in polynomial time. Although it is a suboptimal solution, numerical simulations show that this strategy enhances the system sum-rate up to 45% as compared to a traditional four-phase strategy, and up to 13% as compared to the three-phase strategy without power optimization.

Detection of Abnormal Network Traffic Using Bidirectional Long Short-Term Memory

Nowadays,web systems and servers are constantly at great risk from cyberattacks.This paper proposes a novel approach to detecting abnormal network traffic using a bidirectional long short-term memory(LSTM)network in combination with the ensemble learning technique.First,the binary classification module was used to detect the current abnormal flow.Then,the abnormal flows were fed into the multilayer classification module to identify the specific type of flow.In this research,a deep learning bidirectional LSTM model,in combination with the convolutional neural network and attention technique,was deployed to identify a specific attack.To solve the real-time intrusion-detecting problem,a stacking ensemble-learning model was deployed to detect abnormal intrusion before being transferred to the attack classification module.The class-weight technique was applied to overcome the data imbalance between the attack layers.The results showed that our approach gained good performance and the F1 accuracy on the CICIDS2017 data set reached 99.97%,which is higher than the results obtained in other research.

Short-TermWind Power Prediction Based on Combinatorial Neural Networks

Wind power volatility not only limits the large-scale grid connection but also poses many challenges to safe grid operation.Accurate wind power prediction can mitigate the adverse effects of wind power volatility on wind power grid connections.For the characteristics of wind power antecedent data and precedent data jointly to determine the prediction accuracy of the prediction model,the short-term prediction of wind power based on a combined neural network is proposed.First,the Bi-directional Long Short Term Memory(BiLSTM)network prediction model is constructed,and the bi-directional nature of the BiLSTM network is used to deeply mine the wind power data information and find the correlation information within the data.Secondly,to avoid the limitation of a single prediction model when the wind power changes abruptly,the Wavelet Transform-Improved Adaptive Genetic Algorithm-Back Propagation(WT-IAGA-BP)neural network based on the combination of the WT-IAGA-BP neural network and BiLSTM network is constructed for the short-term prediction of wind power.Finally,comparing with LSTM,BiLSTM,WT-LSTM,WT-BiLSTM,WT-IAGA-BP,and WT-IAGA-BP&LSTM prediction models,it is verified that the wind power short-term prediction model based on the combination of WT-IAGA-BP neural network and BiLSTM network has higher prediction accuracy.

基于HFC的CDMA系统初始化协议研究

本文提出了一种新的基于同步CDMA传输的HFC网络初始化过程的接入协议 .通过和现有接入协议的比较 ,本文提出的接入协议可使用户终端公平、有效的完成进行同步传输之前的全部初始化过程 .本文还考虑了功率控制在初始化过程中对系统的影响 ,最后得出了一个完整的、包括功率控制的初始化方案 .

HFC接入网技术及其信道噪声分析

描述了国家信息基础设施的重要组成部分——用户接入网的基本原理与概念，分析研究了HFC接入网技术的结构与性能特点，深入讨论了HFC接入网信道噪声的形成机理与解决方案。

HFC网络技术及其发展趋势

简要论述了当前 HFC网的技术水平和将来的发展趋势。通过分析 HFC网的交互双向化、宽带数字化、高速广域化和多媒体化的改造 ,指出 HFC网的最终发展方向是城市综合信息网 ,是信息高速公路的重要组成部分。

HFC宽带接入网技术探讨

有线电视以光纤同轴电缆混合的ＨＦＣ网络， 因由于其天然的宽带和普及率高，被认为是有巨大发展潜力的宽带网． 介绍了ＨＦＣ网的主要接入技术：Ｃａｂｌｅ Ｍｏｄｅｍ， Ｓ－ＣＤＭＡ及ＦＬＹ ＣＡＢＬＥ ＭＯＤＥＭ，讨论了它们的原理、特点、存在的问题以及ＨＦＣ网的应用前景．

基于HFC网络上行信道CDMA-预约ALOHA多接入方式吞吐量分析

为了在HFC网络上实现交互式业务 ,人们对基于HFC网络的介质访问协议进行了广泛的研究 .已出现的几种基于HFC的MAC协议基本上都采用了竞争与预约相结合的访问机制 .基于CDMA的HFC是新一代的HFC系统 .本文提出了一种基于CDMA的双向HFC网络竞争与预约相结合的上行信道多址接入方式 .并且为该协议系统建立了四状态Markov链分析模型 ,对该协议进行了性能分析 ,并给出了计算机实验结果与分析 .

HFC网络CDMA时隙ALOHA接入系统性能分析

同步ＣＤＭＡ（Ｓ－ＣＤＭＡ）解决了双向ＨＦＣ系统上行信道的噪声和容量问题，基于Ｓ－ＣＤＭＡ的ＨＦＣ是新一代的ＨＦＣ系统。初始接入ＣＤＭＡ终端是采用时隙ＡＬＯＨＡ技术完成接入进程的，把ＣＤＭＡ技术与时隙ＡＬＯＨＡ技术相结合，会使原来的时隙ＡＬＯＨＡ技术的吞吐量得到一定的改善。本文提出了一种ＨＦＣ网络ＣＤＭＡ．时隙ＡＬＯＨＡ接入系统，分析了该系统的吞吐量性能和接入时延性能，并给出了实验结果与分析。

一种HFC接入网带宽拍卖分配算法

针对HFC接入网单频点带宽合理分配以及频点组内负载均衡的问题,提出了一种基于多标拍卖的HFC接入网带宽分配算法.边缘资源管理器负责拍卖带宽资源,业务代理向其提交投标集合,采用改进的多标拍卖算法分配带宽资源.通过用户接纳控制和预留最低QoS带宽的方法保障多媒体业务的QoS.利用业务代理的用户接纳策略使频点组达到负载均衡.理论分析和实验结果表明,该算法通信开销小,时间复杂度低,能合理有效地分配带宽资源,并使频点组内达到负载均衡.

一种双向HFC网射频指标评价新方法的探讨

对全网的CΜ射频数据进行统计学分析,通过对指标的均值偏移与波动情况研究,得出一种简单、有效、实时的评测双向HFC射频性能的模型,对HFC的运行维护、监督管理具有很好的借鉴意义。

校园网的HFC宽带Internet接入

本文介绍了Ｉｎｔｅｒｎｅｔ接入技术，并重点阐述了ＨＦＣ（光纤同轴混合）网接入技术和深职院校园网ＨＦＣ宽带Ｉｎｔｅｒｎｅｔ接入方案与实施，特别对实施过程中遇到的特殊问题进行分析并给出了解决方案。

HFC上行信道的通信容量与多址接入方案的比较

HFC上行通信是构建宽带HFC接入网的关键。本文将SCDMA多址接入方案引入HFC通信系统中 ,在对HFC信道分析的基础上 。

综合业务SCDMA-HFC系统上行容量分析

基于同步码分多址（SCDMA）的HFC双向传输系统是新一代HFC网络传输综合业务的系统。本文简单介绍了一种基于SCDMA的HFC双向传输系统的结构，分析了传输综合业务的SCDMA－HFC系统上行信道的容量，比较了各种参数对上行容量的影响。

宽带综合业务HFC网

在宽带综合业务接入网中，ＨＤＳＬ和ＡＤＳＬ技术受到双绞线性能的限制，不能满足高质量的服务要求，只是一种过渡性的技术。以ＨＦＣ为基础的ＣＡＴＶ宽带接入网既能满足近期要求，经过升级亦能满足将来全数字式宽带接入网的要求。在设计宽带接入网时，要解决网络中系统的双向传输、接口技术、信号交换、调制解调、频谱安排、网管等一系列技术问题，要设计符合宽带服务要求的前端、光节点及终端设备。目前一些技术已经可供网络升级使用。用环形和星形网结构将分散的ＣＡＴＶ网组成为统一的宽带接入网是一个重要的发展趋势，符合我国国情，将发挥更大的社会和经济效益。

HFC宽带接入网上行带宽分配策略的改进

The request/transmit based upstream bandwidth resource allocation policy of DOCSIS introduces a trouble to the quality of the data service provided in the I-IFC networks. In this paper, the mechanism of the upstream data transrmitting and the process of data service transmitting in the HFC networks are described in detail, and the perfor- mance of the data service in HFC networks is analyzed. An advanced upstream bandwidth resource allocation policy is proposed to improve the quality of the data service in the HFC networks.

基于HFC网络实现农村远程教育

分析了农村远程教育网络接入方案的优缺点。阐述了基于HFC网络的农村中小学远程教育的实现方案 ,该方案具有覆盖率高、初期投资少、建设周期短、可靠性高、维护简便和可用带宽大的优势 ,还可以实现农村农业科学知识的普及。

在HFC网络中上行信道传输方式的探讨

HFC网络中上行信道的漏斗噪声是制约上行信道提高传输速率的主要原因。论文首先探讨了宽带业务对上行信道的要求 ,以此作为比较上行信道的传输方式优劣的标准。然后 ,对DOCSIS标准采用的抗噪声措施进行了分析 ,并用具体实例说明其效果 ;论文指出CDMA(码分多趾 )方式通过降低传输速率来提高抗干扰能力 ,虽然抗干扰能力稍微好一点 ,但传输速率低 ,不适应宽带业务的需要。作者提出的新型网络结构 ,用户之间采用串行方式 ,能消除上行信道噪声的漏斗效应 ,传输速度高 ,可适应宽带业务的需要 ,但技术上尚须进一步完善。