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Search Results: 1 - 10 of 55521 matches for " JIN Zhi-gang "
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Efficiency dynamics on two coupled small-world networks
Zhang, Jin-Fang;Shao, Zhi-Gang;Yang, Lei;
Brazilian Journal of Physics , 2010, DOI: 10.1590/S0103-97332010000400011
Abstract: we investigate the effect of clusters in complex networks on efficiency dynamics by studying a simple efficiency model in two coupled small-world networks. it is shown that the critical network randomness corresponding to transition from a stagnant phase to a growing one decreases to zero as the connection strength of clusters increases. it is also shown for fixed randomness that the state of clusters transits from a stagnant phase to a growing one as the connection strength of clusters increases. this work can be useful for understanding the critical transition appearing in many dynamic processes on the cluster networks.
The Allocation Law of Resources on the Economic Optimal Growth Path and Its on Tax Polices Design
最优经济增长轨道上资源配置法则及在税收政策中的应用

ZHANG Jin-shui,LI Zhi-gang,
张金水
,李志刚

系统工程理论与实践 , 2007,
Abstract: The following allocation law of resources and the scope of its applications are discussed in this paper: the return of the labor is used for consumption and the return of the capital is used for investment.It is pointed out that the allocation law of resources is tenable when some conditions are satisfied about the objective function of the economic system.And the allocation law of resources is used for designing of tax polices.The one sector model and the multi-sector non-linear Input-Output model are constructed respectively,the methods are given for calculating the rational proportion of the total income of tax in GNP.
Regional Bus Operation Bi-level Programming Model Integrating Timetabling and Vehicle Scheduling
区域公交时刻表及车辆调度双层规划模型

LIU Zhi-gang,SHEN Jin-sheng,
刘志刚
,申金升

系统工程理论与实践 , 2007,
Abstract: According to the regional bus operating model,the bi-level programming is established here.In the upper model,the regional bus vehicle scheduling,whose objective is to minimize the number of the required vehicles and the total time of the deadheading trips,is formulated as a class of the scheduling problem complying strictly with the vehicle chain-running time,the maximum capacity and the required retaining vehicles in the each depot.In the lower model,the objective is to minimize the total transfer time of passengers in every connection stop,and the synchronization coefficient describing the cases of lines-crossing in one connection stop and the satisfaction criteria which can select a set of the satisfied solutions for the upper model to decide are defined in this paper.Finally,the efficiency of the algorithm is discussed,and the computational results demonstrate that the model is reasonable and the algorithm is efficient and feasible.
An Optimization Algorithm of Network Coding for Minimizing Coding Nodes
一种最小化编码节点的网络编码优化算法

Hao Kun Jin Zhi-gang,
郝琨
,金志刚

电子与信息学报 , 2011,
Abstract: Although network coding is an effective technology to improve the performance of multicast communication, encoding of node brings the additional overhead. In order to overcome this limitation, this paper proposes a network coding optimization model under the framework of algebraic network coding. And an algorithm called the MCN (Minimizing Coding Nodes) is proposed, which is based on the improved genetic algorithm. In MCN some new methods are introduced into the simple generic algorithm in order to avoid locality problem and to reduce optimization time. The experimental results show that MCN is effective and it runs faster, and that the output network coding scheme requires less coding nodes. Moreover, when it is applied to the actual meaningful network, it can guarantee the same network throughput, and much lower average delay and network overhead as the traditional network.
Regimes Switching in China''''s Business Cycle and Analysis of the Properties of Regimes
中国经济周期波动的区制转移模型及区制状态

LIU Jin-quan,LIU Zhi-gang,
刘金全
,刘志刚

浙江大学学报(人文社会科学版) , 2006,
Abstract: 随着我国经济周期波动性的显著降低,我国价格水平变化的稳定性也逐渐加强,这说明经济增长率与通货膨胀率之间存在一定程度的替代与影响关系。为了描述和检验我国经济周期波动过程中实际产出和名义价格之间的长期均衡关系和短期波动模式,我们使用具有M arkov区制转移性质的向量误差修正模型,对不同状态和区制条件下经济增长率与通货膨胀率之间的相关关系进行了度量和检验。通过检验发现,我国经济周期中存在显著的两区制性质,即经济周期可以划分为“适速增长”阶段和“快速增长”阶段,并且“适速增长”阶段具有更长的持续期和更显著的稳定性;我国经济增长率与通货膨胀率之间的影响与替代关系具有依赖经济周期阶段性的“门限性质”,这意味着在经济周期的不同阶段,我国的经济运行具有不同的“菲利普斯”曲线机制,因此,应该根据经济周期波动的态势对通货膨胀率及其变化做出动态预期,货币政策既要对价格水平产生名义影响,也要对产出水平产生实际影响。
Research on Data Preprocess in Data Mining and Its Application
数据挖掘中数据预处理的研究与实现*

JIAN Zhi-gang,JIN Xu,
菅志刚
,金旭

计算机应用研究 , 2004,
Abstract: In data mining,data preprocess converts the real database to the mining database.So the mining algorithms can run effectively and the mining results can get a better display.Aim at structural data,discusses two targets of the data preprocess.One is to eliminate the defects in real database.The other is to make prepare for the mining process.On this bases,we introduce its application in the KDD, a software of data mining.
An Improved UCON_C-based Authorization Policy Specification in Grid
一种基于改进UCONc的网格授权策略规范

GUI Jin-song CHEN Zhi-gang GUO Ying,
桂劲松
,陈志刚,郭迎

计算机科学 , 2008,
Abstract: The decision-making result of the usage control policy specification based on temporal logic of action only expresses permission or rejection . In service grid, it is difficult to reasonably divide the work of PDP(Policy Decision Point) and PEP(Policy Enforcement Point), and the independent authorization processes are not implemented simultaneously. For that, the paper firstly presents the delegation certification that can express fine-grained rights, and the decision-making result can be expressed by it. S...
Design and realization of micro-code for MPLS VPN
MPLS VPN功能的微码设计与实现*

DU Xiu-juan,JIN Zhi-gang,
杜秀娟
,金志刚

计算机应用研究 , 2008,
Abstract: The IXP2400 network processor with powerful comuting ability made MPLS and MPLS VPN possible.The paper provided the key technology and micro-code of MPLS VPN,and achieved flexible and effcient MPLS VPN with low cost by dispatching task to micro engines and processing flexibly the data packets.The primary characteristic of the design is that it supports L2 and L3 VPN at the same time and the micro-code is very concise.The experiments show the MPLS VPN works properly and are compatible with mainstream network devices.
Enhanced adaptive SNMP for mobile devices
面向移动设备的增强型自适应SNMP协议

JIN Zhi-gang,CHEN Peng,
金志刚
,陈 鹏

计算机应用 , 2006,
Abstract: Combining the standard C/S model and the new adaptive trap scheme, a novel adaptive SNMP for mobile devices was proposed. This new method divided all trap messages into three categories and merged some non-emergent trap messages into a larger one before sending. On the other hand, the very important trap message was sent by agents and acknowledged by NMS to make sure a reliable delivery. According to the trap packet generated procedure and the emergent level, different trap levels used various reporting schemes which efficiently occupy the limited bandwidth of wireless channels. The performance analysis shows that the enhanced scheme of classifying and combining trap packets decreases the utilities of link bandwidth without increasing delay of dealing. The reliability of important trap delivery is increased.
Multi-path transportation of media stream over Ad Hoc network
流媒体在Ad Hoc 网络中的多路径传输

LIU Dan,JIN Zhi-gang,LIU Lei,
刘丹
,金志刚,刘蕾

计算机应用 , 2006,
Abstract: A scheme to transfer media stream over Ad hoc network by multiple paths was proposed,that is to say,in Ad Hoc network,media stream was transferred by multiple paths in the mean time to improve throughput and decrease transmission delay.At the sender,images are split self-adaptively by using partial decompressing algorithm,and according to load balance algorithm,multiple paths were chosen to transfer split data by Multi-path Source Routing(MSR) protocol.At the receiver,received image data were buffered,merged,recovered,decompressed by JPEG algorithm and displayed timely.Demonstrated by experiments,in Ad Hoc network,transferring media stream by multiple paths can achieve better image quality and shorter transmission delay than by a single path.
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