最新刊期
卷 34 ， 期 5 ， 2018
- 摘要：Exploring the way of global coordinated controlling of internet resources for the consistency of user experience,is a difficult problem to be solved urgently in the development of smart network at present.Inspiration was got from the natural collective motion,and a coordinated fitting scheme of globe-domain resources based on node self perception,autonomous decision and automatic adjustment——situational-section fitting network (SiFiNet) was proposed.The basic concept of situational network was given,and the core mechanisms of scene perception modeling,scene fitting decision and service adaptive loading were discussed,which provided a possible solution for the development of smart network.关键词：smart network;situational-section fitting network;collective motion;smart fitting1701|1777|0更新时间：2024-06-05
View the focus
- 摘要：P4 (programming protocol-independent packet processor) can redefine the fields recognized by the forwarding device and its processing logic through software programming.Aiming at the problems that the new architecture CoLoR faces in actual deployment and improvement,the CoLoR architecture was implemented based on P4,and focused on the implementation of its control plane.The way to use the P4 language to define the header recognition and processing logic of CoLoR architecture-related devices,and to use ONOS (open network operating system) to implement the control mechanism was introduced,and it was deployed in practice to perform functional verification and performance testing.关键词：programming protocol-independent packet processor;CoLoR;open network operating system;control plane893|1672|0更新时间：2024-06-05
- 摘要：A distributed similarity matrix computation method based on users’ mobile network access location was proposed.MapReduce computing framework in the Hadoop ecosystem was used,and users’ mobile network access location information was considered as prior knowledge,then users were divided based on geographic location information and the similarity calculation was performed.The experimental results show that the computational efficiency of the proposed method is increased by nearly 25 times compared with the existing similarity matrix computation method.As for the outcome of the community detection,the proposed method get nearly the same results as the existing similar matrix computation method,the agreement rate is nearly 99.9%.关键词：similarity matrix;matrix multiplication;Hadoop;MapReduce;distributed calculation797|1073|0更新时间：2024-06-05
- 摘要：In order to solve the coverage blind problem caused by deployment and failure of heterogeneous static sensor nodes,a coverage scheduling algorithm of mobile sensor nodes for optimizing network lifetime (CSA) was proposed.CSA considerd heterogeneous perceived radius of static sensor nodes and calculates the location of mobile sensor nodes based on the information of neighbor static sensor nodes.According to the location reported by static sensor nodes,coverage scheduling model was established.Heuristic solution method was proposed,to solve the scheduling model,and optimal location of mobile sensor nodes was obtained.The simulation results show that CSA can improve regional coverage and the number of survival static sensor nodes,improve network lifetime and reduce energy consumption of average static sensor nodes.Under certain conditions,CSA is better than Mno,MNode and MGrid algorithms.关键词：wireless sensor network;heterogeneous sensor node;movement scheduling;network coverage908|1279|0更新时间：2024-06-05
- 摘要：The weight of the truth,indeterminacy,and falsity membership under the neutrosophic framework may be different when dealing with different problems.Due to this,a component weighted cosine similarity coefficient was proposed,and it was introduced into the mean shift tracking algorithm.Firstly,the corresponding methods for calculating the membership of the truth,indeterminacy,and falsity were proposed based on the theory of 3σ,as well as the similarity between the features of the corresponding area of the object and background.Then the weighted cosine similarity coefficient was used to construct the weight vector.In addition,a weighted cosine similarity coefficient based scale updating method was proposed.The experimental results demonstrate that the modified visual tracking algorithm performs well,even when there exists challenges like similar background,illumination or scale variation.关键词：neutrosophic set;weighted similarity coefficient;object tracking665|849|0更新时间：2024-06-05
- 摘要：A centralized base station sleeping algorithm based on non-neighbor relation clustering was proposed for dense heterogeneous networks.Firstly,based on the non-neighbor relationship criterion,the low power base stations with no direct switching relationship were clustered into several groups.Then,the low power base station running mode decision mechanism and possible base station sleeping decision mechanism was set according to the energy efficiency mean of base station in each cluster and the position relations between the users and the base station.At last,all clusters run the decision mechanism of inner cluster according to the order of the implementation of sleeping algorithm.The simulation results show that the proposed algorithm has satisfactory network performance.关键词：dense heterogeneous network;non-neighbor relationship clustering;base station sleeping;running mode429|571|0更新时间：2024-06-05
- 摘要：BeiDou navigation satellite system (BDS) is a global navigation satellite system constructed and operated by China.At present,BDS is able to provide location,navigation and time service in Asia-Pacific,and will provide global service in 2020 as planned.As the fact of the rapid development of satellite communication technology,the spectrum and orbits of satellite are increasingly crowed.Therefore,it is vital to perform spectrum monitoring to BDS.Based on the STK orbital prediction data,the access time of the 14 non-GEO satellites in BDS to 9 Chinese cities in 10 days was collected.Group analysis according to different satellites and different cities,and similarity analysis within different cities were performed using the R programming language.At last,preliminary advices on site selection were provided according to the data analysis results.关键词：BeiDou navigation satellite system;STK orbital prediction;monitoring station site selection605|1074|0更新时间：2024-06-05
- 摘要：The mechanism of MC and its impact on the received signal vector were analyzed.A closed-form expression and an approximate expression of SC for antenna arrays with different forms were derived,where the power angle spectrum of arrival signal was modeled as Von Mises (VM) distribution.On this basis,the general expressions of SC with MC effect was derived.Simulation results show that the proposed analytical expressions are in good agreement with the numerical integration results.In addition,under the mutual coupling effect,the correlation of antenna array elements fluctuates around the correlation curve without mutual coupling,and the planar array has better resistance to mutual coupling.关键词：multi-aerial system;array manifold;spatial correlation;mutual coupling effect;Von Mises distribution716|1008|0更新时间：2024-06-05
- 摘要：The popularity and portability of high-fidelity audio recording equipment and playback equipment poses a serious challenge for speaker recognition systems against playback attacks.Based on the differences between the original speech and the playback speech in high frequency region,the algorithm reversed the Mel-filter bank in Mel-frequency cepstral coefficient (MFCC) calculation,and the coefficients before the DCT were used as the features of the algorithm.SVM was utilized as the classifier.Experimental results show that this algorithm can effectively detect the playback speech.In addition,the algorithm is integrated into the GMM-UBM speaker recognition system,which significantly improves the systems’ capability of resisting the playback attack.关键词：speaker recognition;playback speech detection;log Mel-frequency spectrum;inverse Mel-filter group515|1275|0更新时间：2024-06-05
research and development
- 摘要：In view of the existing problems and shortcomings in the current social credit management work,according to the vision and demand of the “Credible Society”,the structure of the intelligent credit governance system based on big data involved in panoramic fiduciary field was put forward,and the core theory and key technology were analyzed.Finally,three typical application scenarios were used to further illustrate the role of the architecture in social credit governance,which was of great significance to improve our government’s governance capability.关键词：big data involved in fiduciary field;credit governance;system architecture916|1069|0更新时间：2024-06-05
- 摘要：Due to the physical proximity,D2D communications can bring proximity gain,reusing gain and hop gain,and thus can potentially increase system spectral-efficiency and energy-efficiency.Full-duplex D2D communications,which enable the transceiver to simultaneously transmit and receive in the same band,can further improve the system performance.Therefore,full-duplex D2D communications has being considered as one of the key techniques in the next generation cellular networks.The features of full-duplex D2D communications and the significance in 5G systems were briefly introduced as well as its applications.Then,the state-of-art research on full-duplex D2D resource allocation was presented and discussed.Finally,some research topics that deserve further study was outlined and concluded.关键词：D2D communication;full-duplex communication;spectrum sharing;interference management;resource allocation1114|1120|0更新时间：2024-06-05
Comprehensive Reviews
- 摘要：Software-defined networking (SDN) is a new future network architecture,and it has become a hotspot in recent years.SDN experimental platform is an important way for future network architecture teaching and practicing.Some limitations were presented in current SDN experiments which commonly used pure software simulation environment.Based on the real hardware environment and the combination of virtualization and cloud computing technology,an SDN experimental platform for applying innovation was constructed.The availability and effectiveness of the experimental platform were verified by three SDN application innovation competitions.关键词：software-defined networking;experimental teaching;cloud computing;virtualization437|590|0更新时间：2024-06-05
- 摘要：Digitization and intelligentization have become the main goals of infrastructure construction.As the most important part of the evolution of the network,the re-architecture of metropolitan area network (MAN) has directly determined the advanced level of the operator’s network.According to the new requirements,detail evolution of MAN re-architecture was discussed in detail based on the development of the key technologies and its application scene.Finally,the phased evolution solution was proposed,which can provide guidance for the technology research and the evolution of network re-architecture.关键词：network re-architecture;virtual network element;network automation742|1583|0更新时间：2024-06-05
- 摘要：The development of telecom market focused on the development model from the incremental development model.In the case of incremental development model,it has become a consensus to prevent customer reduction,to extend customers’ life cycle,to enhance revenues and earnings .User profile technology was used to defend telecom business and customer base in the face of pressure from OTT.Big data technology of user profile was used to describe customer demand,match customer and product,so as to make a breakthrough in marketing.关键词：telecom industry;big data;user profile;stock management;precision marketing;label1588|3797|0更新时间：2024-06-05
- 摘要：Aiming at the pain point of current internet applications,on the basis of analyzing the key factors that should be considered in the development of unified account authentication service,a technical scheme of unified account authentication service based on mobile phone number was put forward,including the overall architecture of the system,the application interface scene,and the implementation of differentiated authentication.Then,the related ideas about the operators’ unified account authentication service interconnection were analyzed.Finally,the prospect of the operators to develop unified account authentication service was also discussed.关键词：unified account;mobile gateway authentication;user card authentication;interconnection and inter-operation513|1372|0更新时间：2024-06-05
- 摘要：The reasonability of craft-layout in core telecommunication room has a very significant impact to the installation and utilization of equipment.Due to the many factors of craft-layout in core telecommunication room,such as electric cabinet configuring and rating,etc.So the planning job will be very complicated.The former simple planning craft-layout cannot satisfy the utilization requirement of high power and large capacity for the future equipment development.Such above factors of craft-layout were analyzed,and combined with the actual condition of telecommunication room,various planning schemes of the craft-layout were put forward.The references and thoughts for the craft-layout in the future were offered.关键词：core telecommunication room;craft-layout;ratio of equipment515|1106|0更新时间：2024-06-05
- 摘要：The IPTV user’s on-demand behavior model based on adaptive segmental stretched exponential (ASSE) was proposed to optimize the configuration of IPTV CDN system,to improve the video scheduling and storage strategy,and to provide users with better experience for video access.At the same time,the probability of the video access by using the actual IPTV user’s on-demand data of China Telecom was simulated.Experiments show that compared with the traditional modeling methods,the ASSE model proposed not only achieves the purpose of simplifying the mathematical model and reducing the computation,but also improves the accuracy of the curve fitting.It has good consistency with the actual data.关键词：IPTV;on-demand system;ASSE model;analysis of user’s behavior457|740|0更新时间：2024-06-05
Operating technology is extensive
- 摘要：With the increasing of information assets of energy group,in order to effectively cope with information security risks,using the big data and the intersecting confirmation mechanics of multi-source data,a monitoring and security warning platform was designed for information devices and application systems in energy group.By the global analysis of big multi-source data,the real-time awareness of risk and situation could be achieved,which was valuable for the progress of operation and management level of information system and timely warning of the spread of information risk to the power system.关键词：big data;intersecting confirmation mechanics of multi-source data;multi-source heterogeneous data;situation awareness810|1244|0更新时间：2024-06-05
- 摘要：The overall design ideas and system integration ideas of local energy internet were introduced.In view of the system integration technology,the local energy internet was explored and studied from three aspects of planning and terminal access integration,equipment and system integration,integration between different systems.The achievements were practiced in the State Grid Customer Service Center Northern Park.Practice results show that local energy internet can convert electrical energy and other clean energy into the cold,heat,electricity and other energy required by the region.The effective integration of energy flow and data flow,complementary advantages,interconnection and sharing among the each energy sources is achieved.关键词：local energy internet;integration technology;distributed energy;multi-energy complement1031|1103|0更新时间：2024-06-05
- 摘要：The ultra wideband location has the advantages of low power consumption,high speed transmission and high security level,especially it can support high location accuracy.It plays an irreplaceable role in the information construction of pumped storage power station.The ultra wideband positioning technology was introduced.The positioning technologies such as RFID,ZigBee,high-frequency pulse were compared and analyzed.The system architecture and positioning principle were described.Finally,the application of the pumped storage power station were introduced.关键词：UWB;pumped storage power station;personnel location’s management system324|756|0更新时间：2024-06-05
- 摘要：The ship shore power system can provide reliable power supply to moored ships and achieve the purpose of energy saving and emission reduction.It is a major advancement in the field of power supply for ports and ships.Taking mobile shore power system as an example,the necessity of using shore power technology for ships was introduced.The function of ship-to-shore power information management and monitoring system was analyzed.The overall framework was divided into four levels and discussed.The basic functions and interrelationships of the layers were analyzed in detail.The architecture and functional modules of the software design were described,and the research and development of the software of each functional module were introduced.关键词：ship shore power;shore power technology;shore power information management;shore power monitoring system;frequency conversion power supply563|1009|0更新时间：2024-06-05
- 摘要：Unstructured data and real-time data were storaged by state grid company’s big data platform distributed file system (based on HDFS optimized package).Based on HDFS optimized packaging,HDFS was characterized by high fault tolerance,low cost and high throughput.It was suitable for large-scale data set applications and effectively supports large file storage.The unstructured data storage and real-time data storage was introduced,and the selection of grid data storage technology was studied.关键词：data center;Hadoop;Hadoop distributed file system;Hbase332|758|0更新时间：2024-06-05
- 摘要：The construction of IT projects in China has entered a stage of rapid development,the problem of the no-clear demand and inaccurate pre-investment estimates in pre-project are exposed.This is the most important reason of IT projects out of control,and it restricts the development of IT projects.The demand of IT project was revised and the relational grade was weighted based on the function point method.The revised demand get from weighted relational grade is beneficial to estimate the costs of the IT projects in pre-project,and it can ensure the orderly completion of IT projects.关键词：IT project;investment estimation;function point method;weighted relational grade;revised demand301|711|0更新时间：2024-06-05
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