查询词典 traffic control

An embodiment of the invention discloses a reverse power control method of an orthogonal frequency-division multiple access system including: calculating decision threshold values of each adjacent subdistrict according to the current reverse traffic channel gain of an access terminal, channel differences between each adjacent subdistrict and the resources distributed by the access terminal; and adjusting the reverse traffic channel gain value of the access terminal according to the decision threshold values of each adjacent subdistrict and using the adjusted reverse traffic channel gain values to determine the transmit power of the reverse traffic channel.

本发明实施例公开了一种正交频分复用多址系统中的反向功率控制方法，包括：根据接入终端的当前反向业务信道增益、各个相邻小区的信道差异以及接入终端所分配的资源情况计算各个相邻小区的判决门限值；根据所述各个相邻小区的判决门限值调整接入终端的反向业务信道增益值，并且利用所调整的反向业务信道增益值决定反向业务信道发射功率。

Have analysed modern city traffic controlling and managing the problem current situation, important problem operating principle , the automation realizing traffic light having set forth traffic light navar with a view of unobstructed reality of city and countryside are commanded to be that urban traffic control automates.

分析了现代城市交通控制与管理问题的现状，结合城乡交通的实际情况阐述了交通灯控制系统的工作原理，实现红绿灯的自动指挥是城市交通管理自动化的重要课题。

The results show that there is fractality containing in traffic flow, which is significant for traffic-flow modeling, traffic volume short-term forecasting and traffic control strategy choosing in pra...

研究结果表明，交通流变化具有分形特性。这一结论对交通流理论建模、交通流短时预测和交通管控策略的制定具有重要的意义。

Summarizing the study of oversaturated traffic control, although it has a long researching history, the acquaintance limitation of network traffic flow retards its development. This limitation includes the traffic flow model, control methodology and control objectives.

纵观对过饱和状态控制问题的研究，虽然起步较早，但限于人们对控制对象认识的水平，使得研究过程中采用的交通流模型、控制方法和控制问题描述等重要的环节有所局限。

Based on the dynamic change of the intersection traffic flow, two intersection traffic control strategies were proposed, including the variable lane use on certain intersection approach, and the split-phase signal control strategy. Then, the potential applicability, advantages and characteristics of the two strategies were analyzed. With the surveyed data, a corresponding simulation model was built, and the effectiveness of these methods was simulated with the traffic signal control simulation software Synchro.

针对信号控制交叉口实际流量动态变化的特征，在现有传统控制方法的基础上根据交叉口交通流的变化特点，提出采用可变车道控制模式的控制方法、单边轮放控制模式的控制方法，介绍了其潜在的适用条件、优势及特点，并在交通流量调查的的基础上，建立了交叉口的相应仿真模型，利用信号控制仿真软件Synchro验证了在高峰期不同控制方法的效果。

Reverse traffic can lead degradation of TCP performance. To resolve this problem, we analyze the impact of reverse traffic carefully, and obtain the relation between reverse traffic and TCP performance. We propose an approach of rate control optimized for unidirectional trip time, and design an algorithm for rate control, called Unidirectional Trip Aware Rate Control, UTARC.

针对反向数据流量会导致TCP性能下降的问题，本文详细研究了反向数据流量对正向数据流应答的影响，揭示了反向数据流量与TCP传输性能之间的联系，提出了面向单向延时优化的速率控制方法，并设计了相应的速率控制算法UTARC。

At present, our country majority cities have already established the many kinds of traffic signal control system, at the same time, the road intersection simple point signal control was still the main signal control way, timed control occupies proportion bigger, undulates a bigger road intersection in some traffic flows, to realize the signal fuzzy control to be imminent.

目前，就我国大多数城市而言，已经建立了多种交通信号控制系统，与此同时，交叉口单点信号控制仍是主要的信号控制方式，其中定时控制所占的比例较大，在一些交通流量波动较大的交叉口，实现信号模糊控制已迫在眉睫。

On account of the traffic flow with the high complexity and randomicity, we could adopt fuzzy theory and fuzzy control technology without setting up an accurate math model, which can avoid the unideal control effect, brought by inaccurate math model, and also can adapt the real-time control. Therefore, this paper applies the fuzzy theory and fuzzy control technology to research and discuss traffic control.

因为，交叉路口交通流的运行具有高度复杂性和随机性的特点，采用模糊理论和模糊控制技术，可以不需要建立精确的数学模型，这样既可以避免由于被控对象数学模型建立的不准确而导致控制效果不理想，又能够适应交叉路口的实时控制要求。

The development direction changed direction according to the four-wheeler, the domestic and international company changes direction organization to control to the four-wheeler currently main adoption of is a numeral control, this is owing to a lot of advantages of numerical control:the procedure turn a control, the controller carries on the processing of operation and numerical information according to the control regulation designed, mainly passing procedure to carry out, if change control regulation need to change software, but need not change the hardware structure of system: control the accuracy is high, in the emulation the control the system, the accuracy of the controller from the accuracy of the component but settle, numerical controller accuracy from word long decision;Stability good;The software replies to use, needing a hardware environment of using the homology realization in the emulation the system, the numerical controller is a procedure control, the sub- procedure mold piece which need to be designed and write to carry out its model, can immediately carry out several links of functions expediently.

目前各个厂家大多采用的是PLC、单片机应用于四轮转向控制器中，功能基本能够实现，相比较之下，信号处理能力较强的数字信号处理器各方面均性能优于以上三种处理器。DSP是新世纪数字化革命的核心。它是一种独特的微处理器，具有可编程性，且实时运行速度远远超过通用微处理器。强大的数据处理能力和高速的运行速度，是DSP最值得称道的两大特色。DSP芯片是一种特别适合进行数字信号处理的微处理器。它强调运算处理的实时性，因此除了具备普通微处理器所强调的高速运算和控制功能外，主要针对实时数字信号处理，在处理器结构、指令系统和数据流程上做了很大的改动。它具有灵活、精确、可靠性好、体积小、功耗低和易于大规模集成等优点。

The authors present fundamental principles of several APF control schemes based on DSP such as space vector modulation, hysteresis current control, monocyclic control, slide mode control, dead beat control, repetitive control, predictive control and ANN based control, and the respective merit and demeritof these control method are pointed out.

文章介绍了基于DSP的空间矢量调制、滞环电流控制、单周控制、滑模控制、无差拍控制、重复控制、预测控制、模糊控制以及人工神经网络控制这几种APF控制方案的基本原理，指出了它们各自的优缺点。

"Bird Man's Diary, Butting on the Love Island", Changsha, China

2008年"鸟人日记，顶在爱情岛"，中国长沙

As long as they were in the service of a family of wizards, their magic would remain dormant.

只要他们一天为家庭服务，他们的法力就潜藏不动。