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1.
为培养复合型人才,科技英语教学的重要性日益显现。分析了目前电子信息类专业中科技英语教学存在的问题,并围绕教学内容改革、教学过程管理等介绍了该课程的教学实践。同时,本文还指出未来科技英语教学的发展趋势。 相似文献
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A multi-objective controller synthesis problem is considered in which an output is to be regulated approximately by assuring a bound on the steady-state peak amplification in response to an infinite-energy disturbance, while also guaranteeing a desired level of performance measured in terms of the worst-case energy gain from a finite-energy input to a performance output. Relying on a characterization of the controllers with which almost asymptotic regulation is accomplished, the problem of guaranteeing the desired level of performance is reduced to solving a system of linear matrix inequalities subject to a set of linear equality constraints. Based on the solution of this system, a procedure is outlined for the construction of a suitable controller whose order is equal to the order of the plant plus the order of the exogenous system. 相似文献
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过怡 《数字社区&智能家居》2009,5(4):2620-2621
该文针对企业的传统业务流程,设计了基于Force.com平台的软件即服务(Software—as—a—Service,SaaS)解决方案,定制开发相关SaaS应用该方案依托Force.com平台可以实现应用的快速配置。Forcc.com平台提供了较好的平台配置和应用定制功能.企业用户可以专注于业务,为类似的系统需求提供了一种解决思路。 相似文献
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In this paper, we present an analysis and synthesis approach for guaranteeing that the phase of a single-input, single-output closed-loop transfer function is contained in the interval [−α,α] for a given α>0 at all frequencies. Specifically, we first derive a sufficient condition involving a frequency domain inequality for guaranteeing a given phase constraint. Next, we use the Kalman–Yakubovich–Popov theorem to derive an equivalent time domain condition. In the case where , we show that frequency and time domain sufficient conditions specialize to the positivity theorem. Furthermore, using linear matrix inequalities, we develop a controller synthesis approach for guaranteeing a phase constraint on the closed-loop transfer function. Finally, we extend this synthesis approach to address mixed gain and phase constraints on the closed-loop transfer function. 相似文献
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An NP-hard production–distribution problem for one product over a multi-period horizon is investigated. The aim is to minimize total cost taking production setups, inventory levels and distribution into account. An integer linear model is proposed as a compact problem specification but it cannot be solved to optimality for large instances. Instead of using a classical two-phase approach (production planning and then route construction for each day), metaheuristics that simultaneously tackle production and routing decisions are developed: a GRASP (greedy randomized adaptive search procedure) and two improved versions using either a reactive mechanism or a path-relinking process. These algorithms are evaluated on 90 randomly generated instances with 50, 100 and 200 customers and 20 periods. The results confirm the interest of integrating production and distribution decisions, compared to classical two-phase methods. Moreover, reaction and path-relinking give better results than the GRASP alone. 相似文献
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基于IBL算法的CBR系统中索引与检索机制研究 总被引:6,自引:1,他引:5
文章介绍了基于示例学习算法IBL的概况,并对其加以改进,提出了一个新的算法IBL-Cluster。它主要由概念描述形成算法和概念描述修改算法构成。在此基础上建立了应用在基于事例的推理系统CBR中的基于IBL算法的索引与检索机制。实验表明新算法IBL-Cluster在存储空间及测试正确率方面均有改善。 相似文献
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为了提高玉米果穗苞叶脱皮环节的苞叶脱净率,通过脱皮辊作业时果穗的受力分析,解析了果穗与苞叶被分离以及果穗未被拧取的作业条件,建模并进行数理分析。结果表明:分离辊拽拉玉米苞叶作用力大于拽拉玉米苞叶所需作用力或拧取角减小到最佳值n满足上述两个基本条件时,本研究装置苞叶脱净率可达97%。 相似文献
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