使拥塞

That is using up a lot of diesel and clogging up the rail network.

这就逐渐耗尽了柴油并使铁路网络拥塞。

With the development of computer and communication technology, it is more and more indescribable that the people's demand in the Internet, so the more and the better control mechanisms which could smooth the network act very important actions, the congestion control is one of the crux, that is how avoid or eliminate the congestion in the network availability, so as to the network runs in the best and the low-grade congest state basically.

随着计算机和通信技术的发展，人们对Internet的需求已经越来越超乎想象，因此更多、更合理的控制机制对现有网络的顺畅运作起着非常重要的作用，其中最基本、最关键的就是拥塞控制，即如何有效防止或消除网络出现的拥塞，使网络基本运行在轻度拥塞的最佳状态。

Network congest can make network communication quality drops not only, still can affect the QoS of service quality standard of the user, still can affect network safety even.

网络拥塞不仅会使网络通信质量下降，还会影响用户的服务质量水平QoS，甚至还会影响到网络平安。

Improve algorithm to adjust the window of every phase as close as position of bandwidth estimation, network connection to rise, combinative network position and bandwidth estimation judge the rationality of congest window, adjust congest window dynamicly, when making congest is about to happen, the window can drop in time appropriate level, avoid what bring about as a result of congest to be lost in group as far as possible.

改进算法将每个阶段的窗口调整和带宽估计、网络状态紧密联系起来，结合网络状态和带宽估计判定拥塞窗口的合理性，动态地调整拥塞窗口，使拥塞即将发生时，窗口能及时下降到适宜的水平，尽量避免由于拥塞而导致的分组丢失。

In addition, because of the inhere defects of the IP network, a lot of devices and bandwidth of the network can not be used sufficiently. That is one of the main reasons for network congestion.

另外，由于传统IP网络的固有缺点，使许多网络带宽和网络设备没有得到充分的利用，这也是造成网络拥塞的一个主要原因。

When you stuck in the jam on rush hour hop on the "electric minicab", this will keep you away from the jam, it's environmentally friendly, low cost and it can also do your grocery delivery!

当您在拥塞的上下班时间跳上"电动小小黄"，可以使您永远保持在车阵最前方，低空气污染，车费低还可送快递喔！

Since they have their own advantages at the algorithms and implements, but none could solution all the problems in the network, come to a briefer and robuster congestion control protocol. The congestion control of Source algorithm needs go deeper into research, especially at the protocol parameters amendment. How to balance these properties still need our discussing.

近几年，在TCP协议的基础上提出了一些新的改进协议，如：HSTCP、STCP、H-TCP、Fast-TCP、BIC和CUBIC等，这些协议公布了它们各自的实现机制和算法，并对可扩展性、带宽利用率、TCP友好性、稳定性、RTT公平性等性能进行衡量和评价，使网络的性能以及解决拥塞问题的灵敏度等方面得到很大程度地改进和提高。

The method to configure RED parameters based on network properties is also presented. Simulations show that the modified Random Early Detection algorithm really performs better than the original Random Early Detection algorithm and can work for a much wider range of traffic. Finally, whether the assured service mechanisms i. e. an edge router tags every arriving packet of a TCP flow based service profile and core router drops packets differently at congestion using active queue management scheme is possible to provide a throughput consistent with target rate, is investigated under different network scenarios. Different factors including target rate tagged algorithm, RIO algorithm and TCP congestion control mechanism how to affect the throughput of an assured service TCP flow are examined. Based on a fluid model. we then derive a model of an assured service TCP flow, which is the function of round trip delay, packet loss rate and token bucket parameters. Based on this model, we observe that in some cases it is possible to regulate the token bucket parameters to gain a consistent throughput with the target rate, while in other cases there exist ranges of values of the achieved rate for which the token parameters have no influence. With the latter, some modified TCP congestion control mechanisms to assure TCP throughput are proposed.

最后，在区别服务网络结构内，研究了当前提出的一种边缘路由器根据服务合同标记、分类数据包，结合内部路由器采用主动队列缓冲管理机制区别处理数据包的确信服务机制是否可在不同网络情况下使TCP连接获得同目标速率相一致的、公平的吞吐量问题；指出影响TCP连接获得同目标速率相一致吞吐量的主要因素是目标速率大小、标记算法参数和TCP连接的拥塞控制算法；对此，基于流模型假设，首次推导出一个以端到端时延、数据包丢失率、漏桶参数为变量的确信服务TCP连接吞吐量模型；利用这个模型进行分析，得到主要结论是在一些情况下可通过设置合适的漏桶参数得到同目标速率更一致的吞吐量，而在另一些网络情况下不管如何设置漏桶参数都不能使TCP连接获得同目标速率一致的吞叶量；对于后一些情况，还初步讨论了改进TCP拥塞控制算法来改善TCP连接性能的方法。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。