In current high-speed data center networks, congestion control is crucial for ensuring consistent high performance. Over the past decade, researchers and developers have explored several congestion signals such as ECN, RTT, and INT. However, most of the existing congestion control algorithms suffer from either imprecise congestion detection due to ambiguous signals or excessive bandwidth loss due to aggressive rate decrease. This paper proposes a novel congestion control mechanism called TOD, which is a trend-oriented delay-based approach designed for lossless data center networks. TOD leverages the change in RTT to learn the congestion trend and adjusts the sending rate accordingly. By analyzing the congestion trend, the sender reacts by adjusting the sending rate to a reasonable level, while still maintaining high bandwidth utilization to dismiss congestion. The sender uses a reference rate, which is calculated by the receiver and communicated back to the sender, to achieve this target. Therefore, TOD is a sender-receiver cooperative congestion control mechanism. We evaluate TOD extensively in NS-3 simulations using both microbenchmark and macrobenchmark. Our experiments demonstrate that TOD outperforms DCQCN and Timely in terms of FCT and convergence speed.
混凝土结构是土木建筑工程中最常见和关键的结构之一,然而近年来因混凝土结构导致的施工质量问题频发,本文对建筑工程中所使用的混凝土结构相关施工技术予以研究,首先分析了土木建筑中混凝土结构出现的常见问题,然后对从搅拌、配置和温控等六个方面对混凝土施工技术进行了研究.本文所做研究对土木过程建筑中混凝土结构施工技术的提升起到了借鉴和参考价值.
Advanced Materials Science and Technology is a peer-reviewed open access journal published semi-annual online by Omniscient Pte. Ltd. The journal covers the properties, applications and synthesis of new materials related to energy, environment, physics, chemistry, engineering, biology and medicine, including ceramics, polymers, biological, medical and composite materials and so on.
国民经济建设与发展的经济基础便是农业,我国作为一个农业大国除了少数年份为调剂品种而有进口外每年需要的粮食、肉类、蔬菜、水果等等都是来自本国的农业。农业的发展需要依靠大自然,需要水分、光照、温度等条件,本身就具有一定的脆弱性,需要依靠各种农业生产技术来维护农业的稳定发展。其中不可或缺的一个环节就是灌溉,因为降水、水利等条件的影响,不同地区的农田水分状况也不同,要想加以调节从而提高农田抵御天灾的能力,农田水利应用而生。从古至今,农业的发展离不开水利工程,可以说农田水利事业的兴衰是影响农业发展成果的一个重要的因素。随着时代的发展以及各种客观条件的改变,比如说水资源愈来愈稀缺,很多农田水利灌溉的质量有所下降,本文将对提高农田水利灌溉质量作出分析并给出适当的建议,希望可以为相关工作人员提供有益的借鉴。
Advanced Materials Science and Technology is a peer-reviewed open access journal published semi-annual online by Omniscient Pte. Ltd. The journal covers the properties, applications and synthesis of new materials related to energy, environment, physics, chemistry, engineering, biology and medicine, including ceramics, polymers, biological, medical and composite materials and so on.
