面向算力网络的全光网MESH化组网规划研究

全光承载网络是算力网络的根基和底座,面向算力网络的业务发展需求将呈现MESH化组网的趋势。在分析算力网络对光网络需求的基础上,对比了全光网MESH化组网和传统组网的差异,进而研究全光网络MESH化组网规划思路与规划重点,最后提出了全光网MESH化部署相关建议,以期更好地助力算力网络新发展。

IP化组网技术在油田生产通信网络中的应用研究

在油田企业生产经营中,通信系统是一个重要组成部分,直接影响数据传输效率和质量。为完善油田企业的生产通信网络,提高网络运行可靠性,本文从油田企业对通信网络的需求和功能实现出发,介绍了互联网协议(internet protocol, IP)化组网的结构和关键技术,包括基站按需自组织技术、联合无线资源调度技术、路由技术、网络管理技术和安全技术。以某油田公司为例,本文详细阐述了IP化组网技术在油田生产通信网络中的实际运用。研究表明,IP化组网技术的应用,有助于建立可靠的生产通信网络,实现生产作业的数字化、智能化管理,加快油田企业的信息化转型步伐。

交通装备电气化高密度技术研究与展望

随着国家“双碳”目标不断推进,能源结构持续优化,交通装备电气化作为一种低碳、环保的解决方案,已成为交通行业发展的重要趋势。文章以交通装备电气化高密度技术发展为研究方向,重点探讨了“器件-组件-装备-系统-架构”链条式高密度关键技术路线,并以中车株洲所的产品为例,通过研究变流高频化、器件定制化、装备硅基化、结构一体化和组网多元化5个高密度设计关键技术和热管理、电磁兼容、可靠性3项高密度共性技术对于提升交通装备性能、效率和可靠性的关键作用,概述了交通装备向更大功率、更轻重量、更小体积等方向发展的研究现状。展望未来,建议交通装备电气化高密度技术从创新链、智能化、新型功率半导体器件技术、安全性4个方面持续创新和发展,为交通行业的绿色转型和可持续发展提供有力支撑。

汽车研发验证中心模块化组网及智慧应用场景研究

本文以某新能源汽车研发验证中心为研究对象,结合当前智能化前沿技术,从网络架构、系统平台及应用场景等方面出发,给出整体设计思路及方案建议,以促进企业数字化转型。

面向租户的虚拟机定制化组网技术

基于Open Stack设计并实现了一个面向租户的虚拟机定制化组网系统,通过资源的元数据定义和基于模板的协同操作,实现云基础设施(计算、存储和网络资源)的自动化部署和管控。具体功能包括统一的图形化租户可拖拽操作、定制化的虚拟机组网编排、动态批量的资源配置更新、网络接口粒度上的服务质量控制以及基于虚拟机网络连接关系的优化映射算法等。该系统可以为租户提供网络配置能力,使租户可以方便、快捷而不受制于技术细节地进行虚拟机组网;性能上降低了网络平均时延,实现了资源的高效匹配,提高了资源利用率。

IP化组网技术在油田生产通信网络中的应用分析

本文对油田生产通信网络中应用IP化组网技术重要性进行分析,并对IP化组网技术在油田通信系统功能完善、业务承载网可用性提升以及油田生产通信系统运维具体应用加以阐述,提出优化油田生产通信网络的一些建议,希望能为提高油田生产通信智能化水平提供参考。

接入网虚拟化融合组网技术探讨

对于接入网来说,是直接面向用户的,存在技术多样化、量大面广等显著特点,在互联网中显得非常重要。从接入网的发展来看,接入网虚拟化融合组网技术的发展是一大必然趋势。文章在分析融合接入网存在问题的基础上,进一步对接入网虚拟化融合组网技术应用进行分析,以期为网络技术的发展提供一些具有价值的参考建议。

网络虚拟化IRF技术在央行地市中支的应用

本文通过对IRF的阐述及对人民银行龙岩市中心支行改造前后网络架构的对比,重点介绍IRF 2组网的各项特点,同时说明其具有高可靠、低成本、易管理、易扩展等多项优势,在今后的网络建设中必将得到进一步的广泛应用。

全业务下城域传送骨干光缆网组网策略研究

在全业务和移动互联网新形势下,移动数据流量逐年快速增长,专线业务的大力发展对城域传送网带来巨大的挑战,其中之一要求城域传送骨干网逐步由环形结构转变为MESH化结构。本文在分析现有环形光缆优劣势的基础上,针对城域骨干网MESH化组网要求,提出相应的骨干光缆组网策略。

有线与无线技术相结合的企业组网方案

对企业网络在大集中、虚拟化、云计算趋势下的网络变化特点进行分析。在传统的以专线为主的企业网络中,主用线路的备份往往采用拨号方式实现,效率低下,已难以满足用户需要。对当前企业客户的组网需求及网络可用性、安全性的需求进行研究,将MPLS-VPN(多协议标签交换虚拟专用网络)技术与3G或4G无线技术相结合,提出基于中国电信产品实现有线与无线技术相结合的高可靠性客户组网解决方案。

短波栅格化组网频率分配优化方法

针对当前短波栅格化组网频率分配中缺乏对频点可用性和频点组合最优化整体方案的问题,提出了频率分配优化方法。基于ITS(Institute for Telecommunication Sciences)软件的短波链路性能预测方法输出频点接收信噪比,采用线性区间划分将其转化为信道质量矩阵,以信道质量矩阵为输入建立频点组合最优化模型,基于部分匹配交叉和逆转变异给出了该优化模型求解的遗传算法。仿真结果表明:采用该频率分配方法可以明显改善短波栅格化组网的信道质量,典型场景下优化程度大约为30%。

COUPLING MODEL OF EXTENDED MANUFACTURING ORGANIZATION AND ITS APPLICATION

For the feature of complex weapon manufacturing on internet,a coupling model is proposed.By using the model,the correlation between manufacturing cells in an extended manufacturing organization can be evaluated quantitatively,so an appropriate control plan is determined.A strategy to improve and reduce the coupling relationship of the organization is studied.A correlation matrix of extended tasks is built to analyze the relationship between sub-tasks and manufacturing resources.An optimization method for manufacturing resource configuration is presented based on the coupling model.Finally,a software system for analyzing coupling model about manufacturing organization on internet is developed,and the result shows that the coupling model is effective.

Quantitative analysis of globularization and modeling of TC17 alloy with basketweave microstructure

The globularization behavior and mechanism of TC17 alloy with basketweave microstructure were investigated, and the models of dynamic and static globularization kinetics were established. The quantitative and metallographic results show that the globularization of α phase is sensitive to the parameters of deformation and heat treatment. By EBSD analysis, the formation and evolution mechanisms of intra-α boundaries are related to discontinuous dynamic recrystallization and continuous dynamic recrystallization, which can form α grains with high and low misorientations between neighbour grains after the heat treatment, respectively. Based on the globularization behavior and mechanism, two modified JMAK models are developed to predict the dynamic and static globularization kinetics, and the mean absolute relative errors(MARE) of 10.67% and 13.80% indicate the accuracy of the dynamic and static globularization kinetics models. The results of this work can provide guidance for controlling microstructure of titanium alloy.

兼顾企业社会责任与经济效益双赢的应急通信发展策略

为摸索市场化环境下应急通信发展,分析了应急通信网组网移动化、应急通信服务产品化、"O2O"营销应急通信服务、应急通信队伍志愿服务制等应对方法,研究了降本增效、注重培养人才的应急通信发展策略。

Optimized Multicast Routing Algorithm Based on Tree Structure in MANETs

Mobile Ad hoc Networks(MANETs) play an important role in emergency communications where network needs to be constructed temporarily and quickly.Since the nodes move randomly,routing protocols must be highly effective and reliable to guarantee successful packet delivery.Based on the data delivery structure,most of the existing multicast routing protocols can be classified into two folders:tree-based and mesh-based.We observe that tree-based ones have high forwarding efficiency and low consumptions of bandwidth,and they may have poor robustness because only one link exists between two nodes.As a treebased multicast routing protocol,MAODV(Multicast Ad hoc On-demand Vector) shows an excellent performance in lightweight ad hoc networks.As the load of network increases,QoS(Quality of Service) is degraded obviously.In this paper,we analyze the impact of network load on MAODV protocol,and propose an optimized protocol MAODV-BB(Multicast Ad hoc On-demand Vector with Backup Branches),which improves robustness of the MAODV protocol by combining advantages of the tree structure and the mesh structure.It not only can update shorter tree branches but also construct a multicast tree with backup branches.Mathematical analysis and simulation results both demonstrate that the MAODV-BB protocol improves the network performance over conventional MAODV in heavy load ad hoc networks.

Component based ant routing protocols analysis over mobile ad hoc networks

To deeply exploit the mechanisms of ant colony optimization （ACO） applied to develop routing in mobile ad hoe networks （MANETS）,some existing representative ant colony routing protocols were analyzed and compared.The analysis results show that every routing protocol has its own characteristics and competitive environment.No routing protocol is better than others in all aspects.Therefore,based on no free lunch theory,ant routing protocols were decomposed into three key components：route discovery,route maintenance （including route refreshing and route failure handling） and data forwarding.Moreover,component based ant routing protocol （CBAR） was proposed.For purpose of analysis,it only maintained basic ant routing process,and it was simple and efficient with a low overhead.Subsequently,different mechanisms used in every component and their effect on performance were analyzed and tested by simulations.Finally,future research strategies and trends were also summarized.

Histochemical localization and characterization of AKP,ACP,NSE,and POD from cultured Apostichopus japonicus

We investigated the distribution of four enzymes involved in the immune response of Apostichopus japonicus. We collected samples of the tentacles, papillate podium, integument, respiratory tree, and digestive tract and stained them for acid phosphatase （ACP）, alkaline phosphatase （AKP）, non-specific esterase （NSE） and peroxidase （POD） activity. The distribution and content of ACE AKP, NSE, and POD differed among the tissues. The coelomic epithelium of the tentacle, papillate podium, and integument and the mucous layer of respiratory tree were positive for ACP activity. The coelomic epithelium and cuticular layer of the tentacle, papillate podium, and integument and the mucous layer and tunica externa of the respiratory tree and digestive tract stained positive or weakly positive for AKP activity. Almost all the epithelial tissues stained positive, strongly positive, or very strongly positive for NSE activity. The cuticular layer of the tentacle and integument and the mucous layer, tunica submucosa, and tunica externa of the respiratory tree and digestive tract stained positive for POD activity. We hypothesize that these enzymes play a role in the immune response in A. japonicus.

Joint Resource Allocation Using Evolutionary Algorithms in Heterogeneous Mobile Cloud Computing Networks

The problem of joint radio and cloud resources allocation is studied for heterogeneous mobile cloud computing networks. The objective of the proposed joint resource allocation schemes is to maximize the total utility of users as well as satisfy the required quality of service(QoS) such as the end-to-end response latency experienced by each user. We formulate the problem of joint resource allocation as a combinatorial optimization problem. Three evolutionary approaches are considered to solve the problem: genetic algorithm(GA), ant colony optimization with genetic algorithm(ACO-GA), and quantum genetic algorithm(QGA). To decrease the time complexity, we propose a mapping process between the resource allocation matrix and the chromosome of GA, ACO-GA, and QGA, search the available radio and cloud resource pairs based on the resource availability matrixes for ACOGA, and encode the difference value between the allocated resources and the minimum resource requirement for QGA. Extensive simulation results show that our proposed methods greatly outperform the existing algorithms in terms of running time, the accuracy of final results, the total utility, resource utilization and the end-to-end response latency guaranteeing.

Clinicopathological significance of B-cell-specific Moloney murine leukemia virus insertion site 1 expression in gastric carcinoma and its precancerous lesion

AIM： To explore the relation between B-cell-specific Moloney murine leukemia virus insertion site 1 （Bmi-1） expression and the clinicopathological features of gastric carcinoma （GC）.METHODS： Immunohistochemistry was used to detect the expression of Bmi-1 and ki-67. Doublelabeling staining was used to display the distribution of Bcl-2^＋/ki-67 cells in 162 cases of GC and its matched normal mucosa and precancerous lesion.RESULTS： The positive rate of Bmi-1 expression in GC（52.5%） was significantly higher than that in normal gastric mucosa （21.6%, X^2 = 33.088, P 〈 0.05）. The Bmi-1 expression in GC was closely related with the Lauren＇s and Borrmann＇s classification and clinicalstage （X^2 = 4.400, 6.122 and 11.190, respectively, P〈 0.05）. The expression of ki-67 was related to the Borrmann＇s classification （X^2 = 13.380, P 〈 0.05）.Bcl-2 expression was correlated with the Lauren＇s classification （Z2 = 4.725, P 〈 0.05）, and the Bmi-1 expression both in GC （rk = 0.157, P 〈 0.05） and inintestinal metaplasia （rk = 0.270, P 〈 0.05）.CONCLUSION： Abnormal Bmi-1 expression in GCmay be involved in cell proliferation, apoptosis andcancerization. This marker can objectively indicate theclinicopathological characteristics of GC.

Exact Solutions of VNE: A Survey

Network virtualization is an enabling technology of running multiple virtual networks on a shared substrate network. It aims to deal with the ossification of current network architecture. As a crucial component of network virtualization, virtual network embedding(VNE) can efficiently and effectively allocates the substrate resource to proposed virtual network requests. According to the optimization strategy, VNE approaches can be classified into three categories: exact, heuristic and meta-heuristic solution. The VNE exact solution is the foundation of its corresponding heuristic and meta-heuristic solutions. This paper presents a survey of existing typical VNE exact solutions, and open problems for the future research of VNE exact solutions are proposed.