Subjects: Geosciences >> Hydrology submitted time 2023-05-17 Cooperative journals: 《干旱区地理》
Abstract： The Kashi River is one of the three major tributaries of the Ili River, Xinjiang, China, and it is important to understand the water quality condition of the watershed for ecological protection in the Ili region. By analyzing the water chemistry composition of the Kashi River Basin and its causes, and using it as a basis for irrigation suitability evaluation of the river. By collecting 289 sets of water samples from the Kashi River, 5 sets of water samples from springs, and 30 sets of water samples from wells during July 2018—2021, the spatial and temporal variation characteristics and controlling factors of water chemistry in the Kashi River Basin were explored by applying mathematical statistics, Piper’s trilinear diagram, Gibbs diagram, and ion proportional relationship, and using USSL diagram, Wilcox diagrams were used to evaluate the suitability of river water for irrigation. The results show that: (1) All water bodies in the Kashi River Basin are weakly alkaline, the total dissolved solids and electrical conductivity (EC) of well water and spring water are slightly larger than those of river water, and the water chemistry type of each water body is Ca2 + -HCO3 - type. (2) Rock weathering is the main controlling factor for the ion source of each water body in the watershed, and the ion source of each water body is mainly affected by carbonate rock weathering. (3) The ion mass concentration of river water varies gently over a short time series, indicating that the ion concentration in the mainstem from 2018 to 2021 varies by the strength of the dilution effect of ice and snow melt and precipitation, being lower from April to July and higher from August to March; the ion mass concentration varies spatially with increasing elevation and the ion mass concentration decreases with the increase of elevation. (4) The water quality of the river is excellent and can be used directly as irrigation water, but the EC in 2021 has a slightly increasing trend. The results of the study can provide a basis for the sustainable use and scientific development and management of water resources in the Kashi River Valley.
Subjects: Computer Science >> Computer System Architecture submitted time 2017-03-09
Abstract：网络体系结构研究是技术问题，但更是影响经济发展的问题。体系结构可视为设计约束通信参与者利益分配契约的物质基础。以互联网络体系结构为基础，本文讨论向用户开放末端网络，提高自治度对促进网络经济发展的作用。本文使用制度经济学分析工具——交易费用经济学和契约经济学，对体系结构衍生的契约进行分析，帮助我们理解具有宏观特征的体系结构在微观经济学层面上的意义。在进一步扩大用户规模的同时，必须系统化研究网络体系结构中制约网络经济发展的因素。我们认为：以威廉姆森2提出的双边规制为契约设计原理，在现有技术下，提高末端网络自治度，可带动新兴信息服务外购市场的产生。物联网络是该市场的载体之一。在此基础上的契约，用户拥有更多在信息服务和信息化设备选择上的自由；同时，网络接入商通过提供虚拟网络可为其专用性资产重新定价。我们给出一种末端网络开放的体系结构——IPVN，并基于该结构提出服务于人居需求的业务承载模型。
Peer Review Status:
Awaiting Review
Subjects: Computer Science >> Computer Hardware Technology Subjects: Computer Science >> Computer Network submitted time 2017-03-09
Abstract：全球路由表的高速膨胀使得当前的互联网域间路由系统的可扩展性面临着严峻的挑战。为了缩减路由表,很多研究提出了新的路由解决方案。本文在介绍了互联网路由系统现状之后,从较高层次上将存在的路由解决方案分为短期方案、路由架构和可扩展路由算法三部分，着重讨论了路由算法和路由架构这两类工作,对经典的可扩展路由算法和路由架构进行了分析和比较，最后对尚未解决的问题和未来的研究方向进行了总结和展望。
Peer Review Status:Awaiting Review
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