首先介绍了链路聚合技术的背景和基本概念,接着说明了LACP协议(Link Aggregation Control Protocol)的内容和原理,其中LACP状态机模块控制着整个LACP协议的运转,是保证基于LACP协议的链路聚合可以有效工作的核心和关键模块。最后以802....首先介绍了链路聚合技术的背景和基本概念,接着说明了LACP协议(Link Aggregation Control Protocol)的内容和原理,其中LACP状态机模块控制着整个LACP协议的运转,是保证基于LACP协议的链路聚合可以有效工作的核心和关键模块。最后以802.3ad的LACP协议为基础,利用有限状态机的设计方法,实现并优化了LACP协议状态机模块的功能。经测试,该模块功能运行正常,能够正确处理协议运行的各种情况。展开更多
As an innovative propulsion technique, combustion mechanism of laser-augmented chemical propulsion has still to be ascertained. Benefiting from high nitrogen content and thermal stability, 5-aminotetrazole is a suitab...As an innovative propulsion technique, combustion mechanism of laser-augmented chemical propulsion has still to be ascertained. Benefiting from high nitrogen content and thermal stability, 5-aminotetrazole is a suitable ingredient for LACP. Under a flowing nitrogen environment, two kinds of unique burning surfaces were observed to occur for 5-ATZ, used as a single reacting propellant ingredient with the addition of carbon, under laser ablation. Both surfaces are hollow structures and differ by the possible presence of edges. Using micro computed tomography, the 3D perspective structures of both surfaces were revealed. Resorting to various characterization methods, a unified formation mechanism for both surfaces is proposed. This mechanism specifically applies to laser ablation, but could be crucial to common burning mechanisms in LACP.展开更多
As an innovative propulsion technique, laser augmented chemical propulsion(LACP) seems superior to the traditional ones. However, the corresponding combustion theories have still to be ascertained for LACP. Burning ra...As an innovative propulsion technique, laser augmented chemical propulsion(LACP) seems superior to the traditional ones. However, the corresponding combustion theories have still to be ascertained for LACP. Burning rate of 5-aminotetrazole(5-ATZ) propellant has been studied by testing pressed samples under different combustor pressures and laser powers. Based on micro computed tomography(Micro CT),an advanced thickness-over-time(TOT) method to characterize the regression of the produced nonplanar burning surface is established. Because of a shell structure covering the combustion surface,the burning rate of the implemented 5-ATZ propellant is not constant during laser ablation. Resorting to functional fitting, a new law of non-constant burning including the effect of the observed unique burning surface structures is proposed. Accordingly, applicable combustion conditions of 5-ATZ based propellants have been preliminarily speculated for future research activities.展开更多
首先介绍了链路聚合(Link Aggregation)的应用背景和基本概念,以及实现链路聚合的LACP(Link Aggregation Control Protocal)协议的内容和原理,其中LACP状态机控制LACP协议运行,是确保LACP协议链路聚合运行的关键,最后说明了利用有限状...首先介绍了链路聚合(Link Aggregation)的应用背景和基本概念,以及实现链路聚合的LACP(Link Aggregation Control Protocal)协议的内容和原理,其中LACP状态机控制LACP协议运行,是确保LACP协议链路聚合运行的关键,最后说明了利用有限状态机在PTN智能接入终端上实现链路聚合的方案。经验证,动态聚合功能正常运行,达到测试要求。展开更多
文摘首先介绍了链路聚合技术的背景和基本概念,接着说明了LACP协议(Link Aggregation Control Protocol)的内容和原理,其中LACP状态机模块控制着整个LACP协议的运转,是保证基于LACP协议的链路聚合可以有效工作的核心和关键模块。最后以802.3ad的LACP协议为基础,利用有限状态机的设计方法,实现并优化了LACP协议状态机模块的功能。经测试,该模块功能运行正常,能够正确处理协议运行的各种情况。
基金supported by the Shanghai Aerospace Science & Technology Innovation Fund (Grant No. SAST201363)the Fundamental Research Funds for the Central Universities (Grant No. 30919012102 in part)。
文摘As an innovative propulsion technique, combustion mechanism of laser-augmented chemical propulsion has still to be ascertained. Benefiting from high nitrogen content and thermal stability, 5-aminotetrazole is a suitable ingredient for LACP. Under a flowing nitrogen environment, two kinds of unique burning surfaces were observed to occur for 5-ATZ, used as a single reacting propellant ingredient with the addition of carbon, under laser ablation. Both surfaces are hollow structures and differ by the possible presence of edges. Using micro computed tomography, the 3D perspective structures of both surfaces were revealed. Resorting to various characterization methods, a unified formation mechanism for both surfaces is proposed. This mechanism specifically applies to laser ablation, but could be crucial to common burning mechanisms in LACP.
基金supported by the Shanghai Aerospace Science & Technology Innovation Fund (grant No. SAST201363)the Fundamental Research Funds for the Central Universities (grant No. 30919012102 in part)。
文摘As an innovative propulsion technique, laser augmented chemical propulsion(LACP) seems superior to the traditional ones. However, the corresponding combustion theories have still to be ascertained for LACP. Burning rate of 5-aminotetrazole(5-ATZ) propellant has been studied by testing pressed samples under different combustor pressures and laser powers. Based on micro computed tomography(Micro CT),an advanced thickness-over-time(TOT) method to characterize the regression of the produced nonplanar burning surface is established. Because of a shell structure covering the combustion surface,the burning rate of the implemented 5-ATZ propellant is not constant during laser ablation. Resorting to functional fitting, a new law of non-constant burning including the effect of the observed unique burning surface structures is proposed. Accordingly, applicable combustion conditions of 5-ATZ based propellants have been preliminarily speculated for future research activities.
文摘首先介绍了链路聚合(Link Aggregation)的应用背景和基本概念,以及实现链路聚合的LACP(Link Aggregation Control Protocal)协议的内容和原理,其中LACP状态机控制LACP协议运行,是确保LACP协议链路聚合运行的关键,最后说明了利用有限状态机在PTN智能接入终端上实现链路聚合的方案。经验证,动态聚合功能正常运行,达到测试要求。
