共查询到20条相似文献，搜索用时 390 毫秒
1.
远程调用(RPC)是一种进程间通讯技术,该技术允许一个程序调用执行处于另一地址空间中(通常是网络中的另一台计算机)的函数,但无须显式编写远程交互代码,即,程序员可以编写基本相同的调用代码,而无须考虑被调的函数处于本地还是远程服务器。设计并实现了一种全新的基于原始接口编译的远程调用代理存根生成器,消除了代理以及存根的编写工作,在MapGis7.x Linux面向网络的地理信息系统应用服务器的开发以及部署工作中初见成效。 相似文献
2.
基于ONC SUN RPC协议(RFC1014、1050)及其linux2.6实现,提出了一种全新的基于原始接口编译的远程调用部署方法,使得本地动态库的远程化过程变得清晰明了,并显著地减少了代理以及桩库的编写工作量,在MapGis7.x分布式网格地理信息系统应用服务器的开发以及部署工作中初见成效。 相似文献
3.
远程过程调用(RPC)是一种通过网络从远程计算机程序上请求服务,而不需要了解底层网络技术的协议。论述了3种远程调用接口定位技术:SOAP方式、负载均衡方式和P2P方式,并分析了远程调用接口技术的未来发展方向。 相似文献
4.
5.
6.
7.
张建军 《北京工业职业技术学院学报》2003,(2)
探讨在VB环境下使用WINSOCK控件实现网络编程,利用网络技术并结合系统资源API函数的调用实现对远程计算机的简单控制,最后提出了增强控制功能的方法。 相似文献
8.
9.
API函数拦截是指通过特定的方法中断API函数的调用,转而执行用户的功能代码的一种行为.介绍了如何通过对API函数的拦截来实现进程的隐藏,重点讨论了所涉及到的DLL注入和API拦截两项关键技术的多种实现途径,并给出了实现进程隐藏的关键代码. 相似文献
10.
代理缓存技术在流媒体中的应用 总被引：1，自引：0，他引：1
流媒体代理缓存技术是为克服现有网络不适应流媒体传输的缺陷而提出的一种网络缓存技术，它通过将经常被访问的数据备份存储在代理服务器的硬盘中，即本地文件中，靠近信息使用者，以后对这些信息的请求就可以直接访问代理缓存，不必再连接到远程服务器上。它降低了网络带宽，减少了网络流量，缩短了网络延迟，缓解了服务器的负荷压力。本文在介绍流媒体技术和代理缓存技术的基础上，详细讨论了在将代理缓存技术应用到流媒体技术中需要解决的问题。 相似文献
11.
针对机器视觉中的图像识别问题,提出一种新的基于结构平衡网络的图像识别方法。从一种新的结构平衡网络（特殊的复杂网络）视角重新审视平面灰度图像,将图像灰度矩阵视为结构平衡网络的连接关系（权值）矩阵（像素点可不作为节点）,通过Hadamard乘积变换得到像结构平衡矩阵,再利用像结构平衡矩阵的拓扑结构,产生新的图像识别特征参量对图像进行描述。该方法具有高速率、高识别率、尺度不变性及旋转不变性等特点。最后的实验仿真验证了该方法的有效性。 相似文献
12.
经过线性化处理的TCP/AQM拥塞控制模型是一个输入带有时滞的源端链路端组合系统。首先修改了带有延迟的网络拥塞控制模型;计算其平衡状态并进行线性化,采用积分变换算法进行延迟变换为无时滞的线性模型,并建立相应的状态空间模型。在模型矩阵参数抖动但有界限的条件下,应用变结构控制算法设计控制器,基于李雅普诺夫稳定性理论和线性矩阵不等式方法给出了该控制器控制的系统可到达和渐进稳定的可行条件,同时根据该条件设计网络链路端主动队列管理算法。最后,仿真结果表明了该算法的有效性。 相似文献
13.
In this paper,the control of complex delayed networks with different nodes is proposed.Firstly,the stabilization of coupled networks with time delay is investigated.By constructing a Lyapunov function,a linear feedback controller design procedure for the networks is converted to the problem of solving a set of linear matrix inequalities.Then the results are extended to networks with both delayed dynamical nodes and delayed couplings.It is shown that the stabilization of complex networks is determined by the dynamics of each uncoupled node,coupling matrix and feedback gain matrix of networks.Two examples are simulated.In the first example,a network with 10 nodes consisting of Lorenz systems and systems proposed by Zhang in 2009 is given.It is found that the network states are divergent without control,and convergent under designed linear feedback controllers.In the second example,a larger network with 100 nodes consisting of delayed Chen systems and delayed Lorenz systems is given.The proposed method is also effective for large scale networks. 相似文献
14.
Many complex dynamical networks display synchronization phenomena. We introduce a general complex dynamical network model. The model is equivalent to a simple vector model of adopting the Kronecker product. Some synchronization criteria, including time-variant networks and time-varying networks, are deduced based on Lyapunov＇s stability theory, and they are proven on the condition of obtaining a certain synchronous solution of an isolated cell. In particular, the inner-coupling matrix directly determines the synchronization of the time-invariant network; while for a time-varying periodic dynamical network, the asymptotic stability of a synchronous solution is determined by a constant matrix which is related to the fundamental solution matrices of the linearization system. Finally, illustrative examples are given to validate the results. 相似文献
15.
For linear switched system with both parameter uncertainties and time delay,a delay-dependent sufficient condition for the existence of a new robust H∞ feedback controller was formulated in nonlinear matrix inequalities solvable by an LMI-based iterative algorithm.Compared with the conventional state-feedback controller,the proposed controller can achieve better robust control performance since the delayed state is utilized as additional feedback information and the parameters of the proposed controllers are changed synchronously with the dynamical characteristic of the system.This design method was also extended to the case where only delayed state is available for the controller.The example of balancing an inverted pendulum on a cart demonstrates the effectiveness and applicability of the proposed design methods. 相似文献
16.
For linear switched system with both parameter uncertainties and time delay, a delay-dependent sufficient condition for the
existence of a new robustH
∞ feedback controller was formulated in nonlinear matrix inequalities solvable by an LMI-based iterative algorithm. Compared
with the conventional state-feedback controller, the proposed controller can achieve better robust control performance since
the delayed state is utilized as additional feedback information and the parameters of the proposed controllers are changed
synchronously with the dynamical characteristic of the system. This design method was also extended to the case where only
delayed state is available for the controller. The example of balancing an inverted pendulum on a cart demonstrates the effectiveness
and applicability of the proposed design methods.
Project (No. 2002CB312200) supported by the National Basic Research Program (973) of China 相似文献
17.
QI Dong-lian WANG Qiao 《浙江大学学报(A卷英文版)》2006,7(12):1979-1983
INTRODUCTION Many people paid attention to passive theory and used it to control chaotic dynamical systems (Byrnes and Isidori, 1991; Yu, 1999). Yu (1999) studied the passive equivalence of the Lorenz chaotic system and presented the method of passive control of chaotic system. Using passive theory, Qi and Zhao (2005) researched on the control of Permanent Magnet Synchronous Motor chaotic system, and stabilized the system at different equilibrium points. However, in order to design th… 相似文献
18.
A passive control strategy with nonlinear observer is proposed, which can be used to control a class of chaotic dynamical systems to stabilize at different equilibrium points. If the nonlinear function of chaotic system satisfies Lipschitz condition, the nonlinear observer can observe the state variables of the chaotic systems. An important property of passive system is studied to control chaotic systems, that is passive system can be asymptotically stabilized by state feedback controller whose state variables are presented by nonlinear observer. Simulation results indicated that the proposed chaos control method is very effective in a class of chaotic systems. 相似文献
19.
讨论了一类基于T-S模糊模型的非线性系统,根据满意控制思想提出一种条件约束下的状态反馈控制设计方法。即在H∞控制基础上,加入圆形极点指标和状态协方差指标约束。进而研究了圆形极点约束和状态协方差约束下,系统被控输出对扰动输入的H∞抑制界优化问题,并且将H∞优化、圆形极点和状态协方差指标约束的状态反馈控制器设计归结为求一组线性矩阵不等式(LMI)的可行解问题,通过求解LMI得到满足要求的控制器参数。仿真结果表明该方法可行有效。 相似文献
20.
改进了传统的神经网络BP算法,提出了基于广义BP算法的非线性不确定系统的神经网络模型参考自适应控制方案.并将其用于非线性不确定系统的控制,仿真实验表明了控制器具有良好的非线性控制性能. 相似文献