Improved Multicast Protocol Based on Routing Grid

Problems may occur in ad hoc network when packets are being multicast. Global routing structure may also produce extra processing cost because the dynamic topology will introduce frequent exchange of routing vector or routing state between nodes. To deal with these problems an improved multicast protocol based on routing grid is designed to ensure that the multicast packets could be sent to destination through dynamic topology network using multicast routing grid.     

小间隙在薄板精密冲孔工艺中的应用

链板孔的冲裁精度要求较高,精度等级一般在7级。工厂为了达到这一精度,通常采用冲孔后再进行一次修孔的冲裁工艺。这种工艺不仅影响链板孔的节距精度,而且工效差。欲解决这一矛盾,大体有两种方法。一种是采用精密冲孔工艺,这种工艺要求材料硬度控制在一定范围内。这就需要在轧制     

探究物联网技术及其在智能物流中的应用

物联网技术是一个基于电信网、互联网等信息是承载体,能够有效地将全部独立寻址的普通物理对象互联互通起来。物联网技术能够积极影响到物流服务各环节运作,进一步推动物流功能整合,提升物流自动化、信息化、智能化水平。本文首先分析了物联网技术概况,其次,就物联网技术在智能物流中的应用状况进行了较为深入的探讨,同时,还阐述了物联网技术在智能物流中的发展趋势,具有一定的参考价值。     

Improved Multicast Protocol Based on Routing Grid

Problems may occur in ad hoc network when packets are being multicast. Global routing structure may also produce extra processing cost because the dynamic topology will introduce frequent exchange of routing vector or routing state between nodes. To deal with these problems an improved multicast protocol based on routing grid is designed to ensure that the multicast packets could be sent to destination through dynamic topology network using multicast routing grid.     

Reputation evaluation method for open multi-agent systems

A reputation evaluation method based on multi-dimensional information representation and correlative algorithm is proposed for open multi-agent systems. First,a vector model is established to represent the reputation related information. Second,a vector based reputation model"TRUST"is put forward to evaluate the reputation of agents. Finally,a correlative algorithm for selecting the most appropriate service provider is proposed. Simulation results indicate that the method can quickly and accurately to achieve the aim of adaptive immunity to reputation fraud and improving the average gain that service consumer agents obtained.     

用于加热卷烟的轻型皮带机设计

烟草制品目前正在朝着多元化、健康化的趋势发展,加热卷烟作为最具发展前景的一种新型烟草正在以迅猛之势发展.加热卷烟薄片的生产过程中更应关注输送的连续性、设备间的整体性、设备自身的稳定性,传统的带式输送机不足以满足以上要求,故研发设计一种适用于加热卷烟的轻型皮带机.     

小间隙在薄板精密冲孔工艺中的应用

<正> 链板孔的冲裁精度要求较高,精度等级一般在7级。工厂为了达到这一精度,通常采用冲孔后再进行一次修孔的冲裁工艺。这种工艺不仅影响链板孔的节距精度,而且工效差。欲解决这一矛盾,大体有两种方法。一种是采用精密冲孔工艺,这种工艺要求材料硬度控制在一定范围内。这就需要在轧制过程中适当进行退火工序。在目前能源比较紧张的情况下很难推行。另一种方法就是介于精密和普通冲裁之间的小间隙冲裁工艺。这种冲裁工艺目前国内外正在试用。本文就有关小间隙冲裁工艺结合我厂试用情况分析论述如下:     

新型分布式计算系统中的异构任务调度框架

随着大数据和机器学习的火热发展,面向机器学习的分布式大数据计算引擎随之兴起.这些系统既可以支持批量的分布式学习,也可以支持流式的增量学习和验证,具有低延迟、高性能的特点.然而,当前的一些主流系统采用了随机的任务调度策略,忽略了节点的性能差异,因此容易导致负载不均和性能下降.同时,对于某些任务,如果资源要求不满足,则会导...     

深部巷道底臌机理及控制对策研究

底臌是深部软岩巷道常见的病害之一。根据软岩支护理论,结合工程实际,提出了锚索+底角注浆锚杆控制底臌方案。模拟结果表明:采用锚索护顶,同时选择具有较高刚度和抗弯能力的注浆底角锚杆,合理布置参数,可以有效切断滑移线场,达到控制底臌的目的。