共查询到20条相似文献,搜索用时 93 毫秒
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MAES系列通用专家系统的结构及使用方法 总被引:2,自引:0,他引:2
叙述一种国内自主开发的专家系统开发工具,可以替代进口的专家系统。它可应用于工业,农业,军事,医疗,交通,旅游,环保,气象,航空等领域,实现诊断,计划,设计,咨询,管理,市场预测,投标等。 相似文献
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我们都是普通得不能再普通的人,我们每天每天穿梭在钢筋水泥的丛林中,忙碌奔波,看上去,我们和大多数人没有什么不同,我们起床,我们吃早饭,我们上班,我们跟上司和同事争论,我们吃午饭,我们接着上班,我们下班,天黑了,我们一边吃晚饭,一边抱怨工作的辛苦,我们看电视,我们看书,我们睡觉,为明天的重复行为储备精力,日复一日,周而复始,我们拥有那么相似的人生……这是我想要的人生吗?不,我很肯定,我不想要这样沉闷的生活,我知道,你也跟我一样。那么,让我们在阳光里,蓝天下,草地上,大声地喊出来:我的人生我作主! 相似文献
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你从没有如此的尴尬,面对攻击,竟然束手无策,你用尽了全力,却还是枉然,你思考着这一切的发生,终于明白在这数字化空间里,有喜悦,有悲伤,更还有那许多熟悉的陌生人给你的网络攻击,有的可能是善意的,一个玩笑,但更网络是伤害,威胁,当然,攻击不是网络的全部,但它是对网络最大的亵渎,破坏了网络赖以维系的准则,即使在今天,你还平安而惬意的冲浪在网海里,可能你并不以为网络攻击的威力会有多大,但我想对你说,在网络上,数字化方式的保存是非常容易的,但它的失去更容易,一次的意外,将使得你永远失去。这就是网络,那不确… 相似文献
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《计算机光盘软件与应用》2005,(12):129-135
Lailai是一个人物,爱幻想,爱思考,没有嘴巴,回为Lailai不爱多说话,不喜欢是是非非,也没有耳朵,因为Lailai不在乎别人的看法,走自己的路,独立,自由,眼神很顺利,因为Lailai要用它来分辨这世间的一切美和丑,双手发达,因为Lailai热爱劳动,热爱生活, 相似文献
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叶松 《电子制作.电脑维护与应用》2004,(8):45-46
近年来,能插在电脑上使用的玩意儿越来越多,比如数码相机,打印机,扫描仪,游戏杆,读卡器,MP3播放器,无线耳机收发器,微型硬盘等等,数不胜数,随着即插即用功能的出现,在电脑上添加新设备也越来越简单,但新添加的设备会请求使用系统资源,因此添加的设备越多,出现资源冲突的可能性也越高。结果呢?系统可能会变慢,死机,无法启动。 相似文献
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智能家庭的出现得益于现代计算机技术,网络通讯技术,自动控制技术的飞速发展,基于智能家庭网络平台,实现家庭住宅的智能化,用户可以通过它在网上冲浪,观看电影,在家办公,网上订货,远程教育等等,其目的是使人类的生活更简便,更高效,更舒适,极大地提高了生活质量,同时,引发了新的家庭教育模式的转变,人们不仅要重视基本的家庭教育内容,而且,要提高计算机教育在家庭教育的地位,随之而来的计算机教育正在城市家庭中普及,有些家庭几代人都在追赶计算机学习的热潮,显而易见,智能化家庭正朝着我们走来。 相似文献
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给出了一种由神经元和静态解耦网络相结合的针对火电厂球磨机现场总线控制的方案。并在此基础上将此控制方案应用于火电厂球磨机的现场总线控制系统的设计和开发,论证了该种控制方案在FCS控制系统中的可行性,并详细阐述了该控制方案在FCS上位监控级和现场级的实现方法和过程。从实时仿真和现场运行的结果看,该种控制方案在FCS中实现可以取得令人满意的控制效果。 相似文献
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Nonlinear model predictive control scheme for stabilizing annulus pressure during oil well drilling 总被引:4,自引:0,他引:4
This paper presents a nonlinear model predictive control scheme for stabilizing the well pressure during oil well drilling. While drilling, a fluid is pumped through the drill string and the drill bit, and is returning through the annulus between the drilled well and the drill string. Varying reservoir conditions and fluctuation in circulation flow rates cause sudden variations in the pressure conditions along the well. To compensate for these pressure fluctuations, the annulus choke valve opening can be adjusted. The proposed control scheme is based on a first-principles two-phase flow model using spatial discretization of the complete well. The optimal future choke settings are found using the Levenberg–Marquardt optimization algorithm. This control scheme is evaluated against two other control methods, a manual control scheme and a standard feed-back PI-control scheme of the choke valve with feed-forward control of the pump rates. The PI-control parameters are found using the Ziegler–Nichols closed-loop method based on simulations from a low-order model. The results show that both the PI-control scheme and the model predictive control scheme are superior to manual control. However, the PI-control scheme requires that the control parameters are re-designed when the operating conditions are deviating from the original design conditions. The model predictive control scheme will perform within the operating limits as long as the detailed model is able to describe the actual conditions of the well. 相似文献
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Luis Gracia Carlos Perez-Vidal 《International Journal of Control, Automation and Systems》2009,7(5):764-776
This research presents a new control scheme for visual servoing that takes into account the delay introduced by image acquisition
and image processing. Firstly, previous control schemes for visual servoing are discussed and then a new control scheme is
proposed and fully described. Afterwards, the capabilities (steady-state errors, stability margins, step time response, etc.)
of the proposed control scheme and of previous ones are analytically analyzed and compared. Next, several simulations and
experimental results are provided to validate the analytical results and to illustrate the benefits of the proposed control
scheme. In particular, it is shown that this new control scheme clearly improves the performance of the previous ones. 相似文献
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On the practice of artificial intelligence based predictive control scheme: a case study 总被引:2,自引:2,他引:0
This paper describes a novel artificial intelligence based predictive control scheme for the purpose of dealing with so many
complicated systems. In the control scheme proposed here, the system has to be first represented through a multi-Takagi-Sugeno-Kang
(TSK) fuzzy-based model approach to make an appropriate prediction of the system behavior. Subsequently, a multi-generalized
predictive control (GPC) scheme, which is organized based on a number of GPC schemes, is realized in line with the investigated
model outcomes, at chosen operating points of the system. In case of the proposed control strategy realization, the investigated
multi-GPC scheme is instantly updated to handle the system by activating the best control scheme through a new GPC identifier,
while the system output is suddenly varied with respect to time. To present the applicability of the proposed control scheme,
an industrial tubular heat exchanger system and also a drum-type boiler-turbine system have been chosen to drive through the
proposed strategy. In such a case, the simulations are carried out and the corresponding results are compared with those obtained
using traditional GPC scheme in addition to nonlinear GPC (NLGPC) scheme, as benchmark approaches, where the acquired results
of the proposed control scheme are desirably verified. 相似文献
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Best-effort data control and admission control are vital to guarantee quality of service for real-time (voice and video) transmissions in the IEEE 802.11e wireless LANs. In this paper, we propose and study a global data parameter control scheme integrated with a measurement-based admission control scheme for the IEEE 802.11e enhanced distributed channel access. In the proposed global data control scheme, the access point dynamically controls best-effort data parameters of stations globally based on traffic condition. Such a global/centralized data parameter control mechanism provides the best fairness for data transmissions among stations. In the proposed centrally-assisted distributed admission control scheme for voice and video transmissions, stations listen to available budgets from the access point to make decisions on acceptance or rejection of a voice or video stream. Such a scheme provides good differentiation among different access categories and provides good fairness among real-time streams within the same access category. The proposed mechanisms are evaluated via extensive simulations. Studies show that, with the proposed global data control scheme and the admission control scheme, quality of service can be greatly improved while maintaining a good utilization. 相似文献
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离散非线性时变系统开闭环PI型迭代学习控制律及其收敛性 总被引:2,自引:0,他引:2
对于具有重复运动性质的对象,迭代学习控制是一种有效的控制方法.针对一类
离散非线性时变系统在有限时域上的精确轨迹跟踪问题,提出了一种开闭环PI型迭代学习
控制律.这种迭代律同时利用系统当前的跟踪误差和前次迭代控制的跟踪误差修正控制作
用.给出了所提出的学习控制律收敛的充分必要条件,并采用归纳法进行了证明.最后用仿真
结果对收敛条件进行了验证. 相似文献
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提出一种基于无模型自适应控制的自动泊车方案.首先,通过车载传感器采集车周环境信息用于规划期望路径;然后,将自动泊车跟踪问题转化为预瞄偏差角跟踪问题,通过设计相应的无模型自适应控制算法实现自动泊车.该方案设计的优点是仅使用自动泊车过程中生成的前轮转角输入数据和预瞄偏差角输出数据,没有使用任何被控车辆的信息,因此可适用于不同车型. Matlab仿真以及与PID控制方案和Fuzzy控制方案的对比仿真结果验证了所提出方案的可行性. 相似文献