期刊文献+
共找到5,997篇文章
< 1 2 250 >
每页显示 20 50 100
Design and Implementation of an Open Network Security Management Platform 被引量:2
1
作者 曹元大 王勇 《Journal of Beijing Institute of Technology》 EI CAS 2002年第3期316-320,共5页
In order to manage all kinds of network security devices and software systems efficiently, and make them collaborate with each other, the model for an open network security management platform is presented. The feasib... In order to manage all kinds of network security devices and software systems efficiently, and make them collaborate with each other, the model for an open network security management platform is presented. The feasibility and key implementing technology of the model are expatiated. A prototype system is implemented to validate it. 展开更多
关键词 network security management open platform XML RPC SNMP
下载PDF
Service-aware 6G:An intelligent and open network based on the convergence of communication,computing and caching 被引量:77
2
作者 Yiqing Zhou Ling Liu +6 位作者 Lu Wang Ning Hui Xinyu Cui Jie Wu Yan Peng Yanli Qi Chengwen Xing 《Digital Communications and Networks》 SCIE 2020年第3期253-260,共8页
With the proliferation of the Internet of Things(IoT),various services are emerging with totally different features and requirements,which cannot be supported by the current fifth generation of mobile cellular network... With the proliferation of the Internet of Things(IoT),various services are emerging with totally different features and requirements,which cannot be supported by the current fifth generation of mobile cellular networks(5G).The future sixth generation of mobile cellular networks(6G)is expected to have the capability to support new and unknown services with changing requirements.Hence,in addition to enhancing its capability by 10–100 times compared with 5G,6G should also be intelligent and open to adapt to the ever-changing services in the IoT,which requires a convergence of Communication,Computing and Caching(3C).Based on the analysis of the requirements of new services for 6G,this paper identifies key enabling technologies for an intelligent and open 6G network,all featured with 3C convergence.These technologies cover fundamental and emerging topics,including 3C-based spectrum management,radio channel construction,delay-aware transmission,wireless distributed computing,and network self-evolution.From the detailed analysis of these 3C-based technologies presented in this paper,we can see that although they are promising to enable an intelligent and open 6G,more efforts are needed to realize the expected 6G network. 展开更多
关键词 6G Convergence of 3C INTELLIGENT open IOT
下载PDF
Open-Source Software Defined Networking Controllers:State-of-the-Art,Challenges and Solutions for Future Network Providers
3
作者 Johari Abdul Rahim Rosdiadee Nordin Oluwatosin Ahmed Amodu 《Computers, Materials & Continua》 SCIE EI 2024年第7期747-800,共54页
Software Defined Networking(SDN)is programmable by separation of forwarding control through the centralization of the controller.The controller plays the role of the‘brain’that dictates the intelligent part of SDN t... Software Defined Networking(SDN)is programmable by separation of forwarding control through the centralization of the controller.The controller plays the role of the‘brain’that dictates the intelligent part of SDN technology.Various versions of SDN controllers exist as a response to the diverse demands and functions expected of them.There are several SDN controllers available in the open market besides a large number of commercial controllers;some are developed tomeet carrier-grade service levels and one of the recent trends in open-source SDN controllers is the Open Network Operating System(ONOS).This paper presents a comparative study between open source SDN controllers,which are known as Network Controller Platform(NOX),Python-based Network Controller(POX),component-based SDN framework(Ryu),Java-based OpenFlow controller(Floodlight),OpenDayLight(ODL)and ONOS.The discussion is further extended into ONOS architecture,as well as,the evolution of ONOS controllers.This article will review use cases based on ONOS controllers in several application deployments.Moreover,the opportunities and challenges of open source SDN controllers will be discussed,exploring carriergrade ONOS for future real-world deployments,ONOS unique features and identifying the suitable choice of SDN controller for service providers.In addition,we attempt to provide answers to several critical questions relating to the implications of the open-source nature of SDN controllers regarding vendor lock-in,interoperability,and standards compliance,Similarly,real-world use cases of organizations using open-source SDN are highlighted and how the open-source community contributes to the development of SDN controllers.Furthermore,challenges faced by open-source projects,and considerations when choosing an open-source SDN controller are underscored.Then the role of Artificial Intelligence(AI)and Machine Learning(ML)in the evolution of open-source SDN controllers in light of recent research is indicated.In addition,the challenges and limitations associated with deploying open-source SDN controllers in production networks,how can they be mitigated,and finally how opensource SDN controllers handle network security and ensure that network configurations and policies are robust and resilient are presented.Potential opportunities and challenges for future Open SDN deployment are outlined to conclude the article. 展开更多
关键词 ONOS open source software SDN software defined networking
下载PDF
Spatial Distribution Feature Extraction Network for Open Set Recognition of Electromagnetic Signal
4
作者 Hui Zhang Huaji Zhou +1 位作者 Li Wang Feng Zhou 《Computer Modeling in Engineering & Sciences》 SCIE EI 2024年第4期279-296,共18页
This paper proposes a novel open set recognition method,the Spatial Distribution Feature Extraction Network(SDFEN),to address the problem of electromagnetic signal recognition in an open environment.The spatial distri... This paper proposes a novel open set recognition method,the Spatial Distribution Feature Extraction Network(SDFEN),to address the problem of electromagnetic signal recognition in an open environment.The spatial distribution feature extraction layer in SDFEN replaces convolutional output neural networks with the spatial distribution features that focus more on inter-sample information by incorporating class center vectors.The designed hybrid loss function considers both intra-class distance and inter-class distance,thereby enhancing the similarity among samples of the same class and increasing the dissimilarity between samples of different classes during training.Consequently,this method allows unknown classes to occupy a larger space in the feature space.This reduces the possibility of overlap with known class samples and makes the boundaries between known and unknown samples more distinct.Additionally,the feature comparator threshold can be used to reject unknown samples.For signal open set recognition,seven methods,including the proposed method,are applied to two kinds of electromagnetic signal data:modulation signal and real-world emitter.The experimental results demonstrate that the proposed method outperforms the other six methods overall in a simulated open environment.Specifically,compared to the state-of-the-art Openmax method,the novel method achieves up to 8.87%and 5.25%higher micro-F-measures,respectively. 展开更多
关键词 Electromagnetic signal recognition deep learning feature extraction open set recognition
下载PDF
Improved multipath routing with WNN for the open networks 被引量:5
5
作者 WANG Yang WANG Ru-chuan CHENG Xi 《The Journal of China Universities of Posts and Telecommunications》 EI CSCD 2008年第2期107-113,共7页
Multipath routing mechanism is vital for reliable packet delivery, load balance, and flexibility in the open network because its topology is dynamic and the nodes have limited capability. This article proposes a new m... Multipath routing mechanism is vital for reliable packet delivery, load balance, and flexibility in the open network because its topology is dynamic and the nodes have limited capability. This article proposes a new multipath switch approach based on traffic prediction according to some characteristics of open networks. We use wavelet neural network (WNN) to predict the node traffic because the method has not only good approximation property of wavelet, but also self-learning adaptive quality of neural network. When the traffic prediction indicates that the primary path is a failure, the alternate path will be occupied promptly according to the switch strategy, which can save time for the switch in advance The simulation results show that the presented traffic prediction model has better prediction accuracy; and the approach based on the above model can balance network load, prolong network lifetime, and decrease the overall energy consumption of the network. 展开更多
关键词 open network multipath routing traffic prediction WNN
原文传递
基于.NET的NXOpen开发技术研究 被引量:4
6
作者 李如忠 《机械工程与自动化》 2015年第4期83-84,87,共3页
分析了利用NX Open基于.NET平台进行NX二次开发的方法和步骤。通过一个实例,说明了综合运用NX Open和NX的Journal功能,可以实现NX的快速二次开发。该实例实现了从AutoCAD拷贝直线到NX草图的功能,提高了利用NX进行设计的效率。
关键词 二次开发
下载PDF
Software defined networking:Technologies and solutions toward an open network eco-system
7
作者 刘方明 GUO Jian LIU JiangChuan 《Science Foundation in China》 CAS 2017年第1期42-56,共15页
Software-defined networking(SDN),a new networking paradigm decoupling the software control logic from the data forwarding hardware,promises to enable simpler management,more flexible resource usage and faster deployme... Software-defined networking(SDN),a new networking paradigm decoupling the software control logic from the data forwarding hardware,promises to enable simpler management,more flexible resource usage and faster deployment of network services.It opens network functionality,application programmability,and control-to-data communication interfaces that used to be closed in conventional network devices,offering endless opportunities but also challenges for both existing players and newcomers in the market.Through a comprehensive and comparative exploratory of SDN state-of-theart techniques,standardization activities and realistic applications,this article unveils historic and technical insights into the innovations that SDN offers toward an emerging open network eco-system.We closely examine the critical challenges and opportunities when the networking industry is reshaped by SDN.We further shed light on future development directions of SDN in broad application scenarios,ranging from cloud datacenters,network operating systems,and advanced wireless networking. 展开更多
关键词 Software defined networking open network eco-system Cloud computing Datacenters network operating Systems
原文传递
Meta Analysis of Non-penetrating Trabecular Surgery versus Trabeculectomy for the Treatment of Open Angle Glaucoma 被引量:3
8
作者 柯敏 郭敬 钱志刚 《Journal of Huazhong University of Science and Technology(Medical Sciences)》 SCIE CAS 2011年第2期264-270,共7页
This study compared the efficacy of non-penetrating trabecular surgery and trabeculectomy for the treatment of open angle glaucoma. We searched the Cochrane Library, PUBMED (1966 to 2009), Embase (1980 to 2009) an... This study compared the efficacy of non-penetrating trabecular surgery and trabeculectomy for the treatment of open angle glaucoma. We searched the Cochrane Library, PUBMED (1966 to 2009), Embase (1980 to 2009) and CMB-disk (1979 to 2009) for the randomized clinical trials (RCT) concerning the two treatment strategies. The reports, including the papers listed in bibliographies, were evaluated against a set of quality criteria and the RCTs that satisfied the criteria were selected and subjected to Meta analysis by employing the Cochrane Collaboration's RevMan 4.5 software package. A total of nine RCTs were included in the study. The analyses of the reports showed that, 12 months after surgery, there was significant difference in the reduction of interocular pressure (IOP) between non-penetrating trabecular surgery and trabeculectomy (Z=6.05 P0.00001). There also existed statistically significant difference in the reduction of IOP at the censored time between the two procedures (Z=4.92, P0.00001). Difference in the success rate was also found between the two surgeries (Z=3.82, P=0.0001). It is concluded that, compared with the non-penetrating trabeculectomy, the traditional trabeculectomy could reduce IOP more and had higher success rate while the non-penetrating trabecular surgery is associated with lower postoperative complications. 展开更多
关键词 open angle glaucoma non-penetrating trabecular surgery sclerectomy VISCOCANALOSTOMY TRABECULECTOMY
下载PDF
Association between interleukin-10 genetic polymorphisms and risk of primary open angle glaucoma in a Chinese Han population: a case-control study 被引量:2
9
作者 Yi-Hui Zhang Yi-Qiao Xing +2 位作者 Zhen Chen Xiao-Cheng Ma Qiang Lu 《International Journal of Ophthalmology(English edition)》 SCIE CAS 2019年第10期1605-1611,共7页
AIM: To investigate the association between interleukin-10(IL-10) genetic polymorphisms and risk of POAG through a case-control study in a Han population of China.METHODS: A total of 210 patients with POAG and 420 nor... AIM: To investigate the association between interleukin-10(IL-10) genetic polymorphisms and risk of POAG through a case-control study in a Han population of China.METHODS: A total of 210 patients with POAG and 420 normal subjects were recruited during the period from Dec. 2013 to Dec. 2016. The IL-10-1082 A>G(rs1800870),-819 T>C(rs1800871) and-592 C>A(rs1800872) polymorphisms were determined using iPlex GOLD SNP genotyping analysis(the SequenomMassARRAY? System, Sequenom, San Diego, USA). The association between IL-10-1082 A>G(rs1800870),-819 T>C(rs1800871), and-592 C>A(rs1800872) polymorphisms and risk of POAG was assessed by singlelogistic regression analysis.RESULTS: We observed that those carrying the CC genotype of rs1800871 was associated with an increased risk of POAG when compared with those harboring the TT genotype(OR=1.84, 95%CI=1.01-3.38). Those with AA genotype of rs1800872 had a 10.62 fold risk of POAG in comparison to the CC genotype(OR=10.62, 95%CI, 3.41-33.09). A completely linkage disequilibrium was found between IL-10 rs1800871-rs1800872(D’=1.00, r2=0.16). The A-C-A(OR=2.60, 95%CI, 1.48-4.58) and G-T-A(OR=2.34, 95%CI, 1.42-3.86) haplotypes were associated with an increased risk of POAG, while the A-T-C haplotype showed a decreased risk of POAG(OR=0.63, 95%CI, 0.49-0.81). CONCLUSION: Our data suggest that IL-10 rs1800871 and rs1800872 can be predictive factors for the pathogenesis of POAG in the Chinese population. 展开更多
关键词 primary open angle GLAUCOMA IL-10 POLYMORPHISM HAPLOTYPE
下载PDF
Effect of projectile parameters on opening behavior of PELE penetrating RC target 被引量:2
10
作者 Li-zhi Xu Cheng-xin Du +4 位作者 Chun Cheng Xiao-dong Wang Jiang-bo Wang Zhong-hua Du Guang-fa Gao 《Defence Technology(防务技术)》 SCIE EI CAS CSCD 2021年第3期859-873,共15页
When a penetrator with enhanced lateral effect(PELE) impacts on a reinforced concrete(RC) target,the target is damaged with a large opening.An understanding of how PELE projectile parameters affect the opening dimensi... When a penetrator with enhanced lateral effect(PELE) impacts on a reinforced concrete(RC) target,the target is damaged with a large opening.An understanding of how PELE projectile parameters affect the opening dimension,is essential for effective design of the PELE projectile.In this study,under the condition that the impact velocity and target parameters(strength and thickness) were fixed values,the important influence factors of the PELE(jacket wall thickness B,jacket material strength Y1,filling material strength Y2 and angle of monolithic jacket θ) were determined by a dimensional analysis.Tests and simulations of the PELE penetrating the RC target were conducted to analyze the influence of these factors on opening diameter(D,an equivalent diameter under relative kinetic energy).Based on the test and simulation results,it is found that the influence of these factors B,Y1 and θ on the deformation mode of the jacket shows a similar trend:as values of the three factors decrease,the jacket deforms from small bending deformation to large one,and then to curling deformation.This causes the opening diameter to first increase with the decrease of these three factors,and then decreases.It is well known that the bending resistance of the jacket is related to these factors B,Y1 and θ.Therefore,a plastic limit bending moment(M0) of the jacket was quoted to characterize the influence of these factors on the bending deformation of the jacket and the opening diameter of the target.The influence factor Y2 causes D to first increase with the increase of Y2,and then decreases.A formula was developed to predict the opening diameter,whose influence parameters were considered in a dimensionless way.It has been shown that the dimensionless opening diameter D/d1 is dependent on two dimensionless parameters■ and■,where d1 and fc are the outer diameter of the projectile and the compressive strength of the target,respectively. 展开更多
关键词 Penetrator with enhanced lateral effect opening behaviour Reinforced concrete target Dimensional analysis
下载PDF
Comparison between open phase fault of arc suppression coil and single phase to earth fault in coal mine distribution network 被引量:3
11
作者 LI Xiao-bo WANG Chong-lin 《Journal of China University of Mining and Technology》 EI 2008年第3期368-372,共5页
When, in a coal mine distribution network whose neutral point is grounded by an arc suppression coil (ASC), a fault occurs in the ASC, compensation cannot be properly realized. Furthermore, it can damage the safe and ... When, in a coal mine distribution network whose neutral point is grounded by an arc suppression coil (ASC), a fault occurs in the ASC, compensation cannot be properly realized. Furthermore, it can damage the safe and reliable run of the network. We first introduce a three-phase five-column arc suppression coil (TPFCASC) and discuss its autotracking compensation theory. Then we compare the single phase to ground fault of the coal mine distribution network with an open phase fault at the TPFCASC using the Thévenin theory, the symmetrical-component method and the complex sequence network respectively. The results show that, in both types of faults, zero-sequence voltage of the network will appear and the maximum magnitude of this zero-sequence voltage is different in both faults. Based on this situation, a protection for the open phase fault at the TPFCASC should be estab-lished. 展开更多
关键词 open phase PROTECTION single phase to ground fault three-phase five-column arc suppression coil (TPFCASC)
下载PDF
GPP Based Open Cellular Network Towards 5G 被引量:2
12
作者 Jiang Wang Jing Xu +1 位作者 Yang Yang Haidong Xu 《China Communications》 SCIE CSCD 2017年第6期189-198,共10页
Due to 5G's stringent and uncertainty traffic requirements,open ecosystem would be one inevitable way to develop 5G.On the other hand,GPP based mobile communication becomes appealing recently attributed to its str... Due to 5G's stringent and uncertainty traffic requirements,open ecosystem would be one inevitable way to develop 5G.On the other hand,GPP based mobile communication becomes appealing recently attributed to its striking advantage in flexibility and re-configurability.In this paper,both the advantages and challenges of GPP platform are detailed analyzed.Furthermore,both GPP based software and hardware architectures for open 5G are presented and the performances of real-time signal processing and power consumption are also evaluated.The evaluation results indicate that turbo and power consumption may be another challengeable problem should be further solved to meet the requirements of realistic deployments. 展开更多
关键词 open 5G general purpose processor (GPP) real-time signal processing software defined network (SDN) network function virtualization (NFV)
下载PDF
Giant magnetic moment at open ends of multiwalled carbon nanotubes 被引量:1
13
作者 王钢 陈闽江 +10 位作者 余芳 薛磊江 邓娅 张键 齐笑迎 高燕 褚卫国 刘广同 杨海方 顾长志 孙连峰 《Chinese Physics B》 SCIE EI CAS CSCD 2015年第1期418-422,共5页
The attractions of cantilevers made of multiwalled carbon nanotubes(MWNTs) and secured on one end are studied in the non-uniform magnetic field of a permanent magnet. Under an optical microscope, the positions and t... The attractions of cantilevers made of multiwalled carbon nanotubes(MWNTs) and secured on one end are studied in the non-uniform magnetic field of a permanent magnet. Under an optical microscope, the positions and the corresponding deflections of the original cantilevers(with iron catalytic nanoparticles at the free end) and corresponding cut-off cantilevers(the free ends consisting of open ends of MWNTs) are studied. Both kinds of CNT cantilevers are found to be attracted by the magnet, and the point of application of force is proven to be at the tip of the cantilever. By measuring and comparing deflections between these two kinds of cantilevers, the magnetic moment at the open ends of the CNTs can be quantified.Due to the unexpectedly high value of the magnetic moment at the open ends of carbon nanotubes, it is called giant magnetic moment, and its possible mechanisms are proposed and discussed. 展开更多
关键词 carbon nanotubes open ends giant magnetic moment
下载PDF
Gap opening and tuning in single-layer graphene with combined electric and magnetic field modulation 被引量:1
14
作者 林鑫 王海龙 +1 位作者 潘晖 许怀哲 《Chinese Physics B》 SCIE EI CAS CSCD 2011年第4期446-455,共10页
The energy band structure of single-layer graphene under one-dimensional electric and magnetic field modulation is theoretically investigated. The criterion for bandgap opening at the Dirac point is analytically deriv... The energy band structure of single-layer graphene under one-dimensional electric and magnetic field modulation is theoretically investigated. The criterion for bandgap opening at the Dirac point is analytically derived with a two-fold degeneracy second-order perturbation method. It is shown that a direct or an indirect bandgap semiconductor could be realized in a single-layer graphene under some specific configurations of the electric and magnetic field arrangement. Due to the bandgap generated in the single-layer graphene, the Klein tunneling observed in pristine graphene is completely suppressed. 展开更多
关键词 gap opening at Dirac point single-layer graphene electric and magnetic superlattice second-order perturbation
下载PDF
Clinical and genetic analysis of Ser341Pro MYOC variant in a Korean family with primary open angle glaucoma 被引量:1
15
作者 Sangwoo Moon Namhee Kim Jiwoong Lee 《International Journal of Ophthalmology(English edition)》 SCIE CAS 2020年第11期1689-1696,共8页
AIM:To report the first discovery of Ser341Pro myocilin(MYOC)variant in Korea and analyze its clinical characteristics and genetic significance.METHODS:Ten family members from three generations participated in this st... AIM:To report the first discovery of Ser341Pro myocilin(MYOC)variant in Korea and analyze its clinical characteristics and genetic significance.METHODS:Ten family members from three generations participated in this study and received the thorough ophthalmologic examination.Focused exome sequencing on a proband was performed to confirm the target mutations(MYOC c.1021T>C)in the family members,and the direct sequencing was conducted.Variant was analyzed according to the American College of Medical Genetics and Genomics and the Association for Molecular Pathology(ACMG/AMP)guidelines.RESULTS:A nucleotide change from thymine to cytosine at c.1021T>C was found in eight family members.Three members diagnosed with primary open angle glaucoma(POAG)were characterized by severe clinical presentations,high intraocular pressure,and poor response to medical treatment(100%of the patient required filtering surgery).On variant analysis by ACMG/AMP guidelines,Ser341Pro is not found in normal population.Multiple computational predictive programs support a deleterious effect of Ser341Pro variant(PoIyPhen 2,SIFT,Mutation Taster).Ser341Pro could be involved in moderate(PM)and supporting(PP)criteria(PM1,PM2,PP2,PP3).Combiningthe criteria,Ser341Pro has a combination of 2 moderate(PM1+PM2)and 2 supporting(PP2+PP3)criteria,which is interpreted to"likely pathogenic".CONCLUSION:The Ser341Pro variant is correlated with severe phenotype of POAG.There are similar clinical aspects to previous studies:autosomal dominant inheritance,incomplete penetrance(62.50%and 66.67%),and proportion of patients requiring trabeculectomy(100%in both study).According to ACMG/AMP guidelines and the previous basic researches,the Ser341Pro variant had a"strong evidence of pathogenicity(PS3)"and then it could be interpreted to“pathogenic(PS3,PM1,PM2,PP2,PP3)”.Additionally,Ser341Pro variant can be reported as"c.1021T>C(p.Ser341Pro)",likely pathogenic,POAG,autosomal dominant”according to guideline. 展开更多
关键词 Ser341Pro variant primary open angle glaucoma KOREAN
下载PDF
Identification of suitable sites for open and bore well using ground magnetic survey 被引量:1
16
作者 A Muthamilselvan 《Journal of Groundwater Science and Engineering》 2021年第3期256-268,共13页
The study aims to identify a suitable site for open and bore well in a farmhouseusing ground magnetic survey in south India.It also aims to define depth to granitoid and structural elements which traverse the selected... The study aims to identify a suitable site for open and bore well in a farmhouseusing ground magnetic survey in south India.It also aims to define depth to granitoid and structural elements which traverse the selected area.Magnetic data(n=84)measured,processed and interpreted as qualitative and quantitatively.The results of total magnetic intensities indicate that the area is composed of linear magnetic lows trending NE-SW direction and circular to semi-circular causative bodies.The magnetic values ranged from-137 nT to 2345 nT with a mean of 465 nT.Reduction to equator shows significant shifting of causative bodies in the southern and northern directions.Analytical signal map shows exact boundary of granitic bodies.Cosine directional filter has brought out structural element trending NE-SW direction.Results of individual profile brought to light structurally weak zone between 90 m and 100 m in all the profile lines.Sudden decrease of magnetic values from 2042 nT to 126 nT noticed in profile line 6 between 20 m and 30 m indicates fault occurrence.Magnetic breaks obtained from these maps were visualized,interpreted and identified two suitable sites for open and bore well.Radially averaged power spectrum estimates depth of shallow and deep sources in 5 m and 50 m,respectively.Euler method has also been applied to estimate depth of granitoid and structural elements using structural indexes 0,1,2,and 3 and found depth ranges from<10 m to>90 m.Study indicates magnetic method is one of the geophysical methods suitable for groundwater exploration and site selection for open and borewells. 展开更多
关键词 Magnetic method Groundwater exploration Euler deconvolution open well
下载PDF
Study of Internet-based Open Remote Diagnostic System
17
作者 XU Xue-qi, WANG Tai-yong, LI Guo-wei, WU Jian-gang (School of Mechanical Engineering, Tianjin University, Tianjin 300072, China) 《厦门大学学报(自然科学版)》 CAS CSCD 北大核心 2002年第S1期272-,共1页
With the wide application of information technologi es , Internet-based remote diagnosis (IRD) of plant will surely become the main se rvice mode of corporations in the future. Therefore, it has received a great dea l... With the wide application of information technologi es , Internet-based remote diagnosis (IRD) of plant will surely become the main se rvice mode of corporations in the future. Therefore, it has received a great dea l recognition from academia and the industry. The IRD technology, which is based upon database, computer, and network technologies is the focus of correlative r esearch all over the world. Although some scientific institutions have developed primary IRD systems, their functions are quite narrow with many shortcomings. I n short, the standard of remote diagnosis has not been created, in particula r the network manufacture and diagnostic resources cannot be shared extensiv ely, so the systemic open character has not been developed enough to create the efficiency and the scope of the existing remote diagnostic systems. Aimed at improving the limitations mentioned above, in this paper we try to develop Web -CORBA open remote diagnosis architecture over the Internet, which is based on the existing troubleshooting software. We have designed and realized the general -purpose data interface of the software and some Java applets functional module s. Thereby the software’s open character and application field get widened. Our current research is focused on building the remote intelligent diagnosis center on the basis of the Web-CORBA architecture. Some basic functions have been app lied. Further, we put forward the project of combining the enterprise interior d iagnostic system to the remote diagnosis center, and make a study of building th e remote diagnosis object network architecture. The open remote diagnostic syste m based on Internet offers many advantages. Also, with the CORBA distributed obj ect technology, the distributed diagnostic resources can be connected as a coope rative diagnosis object system, in order that all the resources can be shared to the full extent, and the advanced diagnostic technique can be applied as soon a s possible. This is the inevitable trend of the diagnostic technology. 展开更多
关键词 remote diagnosis CORBA JAVA open system
下载PDF
Synergetic optimization operation method for distribution network based on SOP and PV 被引量:1
18
作者 Lei Chen Ning Zhang +4 位作者 Xingfang Yang Wei Pei Zhenxing Zhao Yinan Zhu Hao Xiao 《Global Energy Interconnection》 EI CSCD 2024年第2期130-141,共12页
The integration of distributed generation brings in new challenges for the operation of distribution networks,including out-of-limit voltage and power flow control.Soft open points(SOP)are new power electronic devices... The integration of distributed generation brings in new challenges for the operation of distribution networks,including out-of-limit voltage and power flow control.Soft open points(SOP)are new power electronic devices that can flexibly control active and reactive power flows.With the exception of active power output,photovoltaic(PV)devices can provide reactive power compensation through an inverter.Thus,a synergetic optimization operation method for SOP and PV in a distribution network is proposed.A synergetic optimization model was developed.The voltage deviation,network loss,and ratio of photovoltaic abandonment were selected as the objective functions.The PV model was improved by considering the three reactive power output modes of the PV inverter.Both the load fluctuation and loss of the SOP were considered.Three multi-objective optimization algorithms were used,and a compromise optimal solution was calculated.Case studies were conducted using an IEEE 33-node system.The simulation results indicated that the SOP and PVs complemented each other in terms of active power transmission and reactive power compensation.Synergetic optimization improves power control capability and flexibility,providing better power quality and PV consumption rate. 展开更多
关键词 Synergetic optimization Soft open point(SOP) Photovoltaic(PV) Distribution network
下载PDF
Open Access Strategy in Cloud Computing-Based Heterogenous Networks Constrained by Wireless Fronthaul
19
作者 Zhongyuan Zhao Yong Li +2 位作者 Weiliang Xie Min Wang Wenbo Wang 《China Communications》 SCIE CSCD 2017年第2期143-153,共11页
Cloud computing.based heterogeneous networks(C.Het Nets) have been considered as promising network architecture of future wireless communication systems. However, its performance is constrained by the capability of fr... Cloud computing.based heterogeneous networks(C.Het Nets) have been considered as promising network architecture of future wireless communication systems. However, its performance is constrained by the capability of fronthaul. To study the performance limit of C.Het Nets, the coverage performance of the open access strategy in C.Het Nets is analyzed in this paper. In particular, the non.ideal condition of fronthaul in C.Het Nets is characterized by establishing a stochastic geometry.based model, and a tight lower bound on coverage probability is derived for downlink transmissions. Based on the derived results, the constraint of the fronthaul is given to ensure that open access strategy can achieve the best coverage performance. Finally, the simulation results are provided to verify the theoretical results and show the impact of fronthaul constrains. 展开更多
关键词 C-Het nets open access strategy coverage probability stochastic geometry
下载PDF
THE MEASUREMENT OF COMPLEX PERMITTIVITY OF ANISOTROPIC DIELECTRICS BY MEANS OF AN ELECTROMAGNETIC OPEN RESONATOR
20
作者 夏军 梁昌洪 《Journal of Electronics(China)》 1994年第2期156-163,共8页
By applying the perturbation method and the complex-source-point theory, the theoretical research of measurement of complex permittivity of uniaxial anisotropic materials by means of an electromagnetic open resonator ... By applying the perturbation method and the complex-source-point theory, the theoretical research of measurement of complex permittivity of uniaxial anisotropic materials by means of an electromagnetic open resonator has been made, and the double refraction phenomenon due to anisotropy of measured dielectric materials has been quantitatively analyzed. Finally, measurements have been made on some single-crystal quartz specimens using an automated open resonator measurement system at 8mm band. 展开更多
关键词 ELECTROMAGnetIC open RESONATOR ANISOTROPIC dielectrics COMPLEX PERMITTIVITY PERTURBATION method Complex-source-point theory
下载PDF
上一页 1 2 250 下一页 到第
使用帮助 返回顶部