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软件操作教学问题解决策略 总被引:1,自引:0,他引:1
在信息技术教育教学的过程中,教师会遇到如何有效地向学习者介绍软件的使用,以及一些特定问题的说明演示.学习者也常常在对一些软件的使用操作上存在一定困难,也旨在为这类教育教学问题提供一个有效的解决方案和策略. 相似文献
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笔者在进行万用表使用的教学过程中,常常遇到一些学生原理不清,以至出现操作错误或不会使用的现象。本文从万用表的结构及工作原理入手,在讨论和分析多量程的工作原理的基础上针对使用中存在的问题,提出了改进教学方法的一些建议。 相似文献
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可鳊程序控制器(PLC)具有抗干扰能力强、可靠性极高,编程方便,使用和维护方便,易实现机电一体化等优点而在工业控制中得到了广泛的应用。所以,在技术改造时会常常遇到应用可编程序控制器(PLC)对继电器控制系统的改造问题,通常这时我们往往要参考原有的继电器控制电路来编制PLC的应用程序。 相似文献
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在专利无效程序中常常会遇到关于现有技术的证明问题,其中使用公开的证明需要达到何种标准是经常遇到且容易存在争议的问题。本文从一件专利无效宣告请求案件出发,分析了专利无效程序中适用的使用公开的证明标准,并结合案件情况探讨了举证责任的分配问题。提出某些情况下举证责任可以倒置以厘清案件事实,有助于专利复审委员会作出客观公正的评判。 相似文献
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在施工中混凝土常常出现温度裂缝,影响到结构的整体性和耐久性。其次,在使用过程中,温度变化对结构的应力状态具有显著的不容忽视的影响。我们遇到的主要是施工中的温度裂缝,因此仅对施工中混凝土结构裂缝的成因和处理措施做一探讨。 相似文献
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在地下介质电磁场计算中,常常会遇到一些计算比较复杂的振荡函数的数值积分问题(比如半空间电、磁场的格林函数的计算),此时合理地使用加速收敛技巧就显得尤为重要,而关于这方面的文章尚不多见。本文介绍了几种较常用的加速收敛方法,并用实例说明其用法。 相似文献
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在学习中,我们常常会遇到解方程及不等式问题,按常规方法很难分析得出结果,但是利用二次函数思想经过分析,问题就可以迎刃而解了。 相似文献
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当基础深度在天然地下水位以下时,在基础施工中常常会遇到地下水的处理问题。所以,在基坑施工中应对地下水的处理给予应有的重视。 相似文献
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英语学习者在学习过程中必然要犯这样或那样的错误,分析学生的错误对教学工作起着重要作用.错误分析可以使教师了解学生学习过程中所存在的问题和面临的困难,并以此调整教学内容和教学计划,指导教学工作,使所有的教学时间有效地用于提高学生的英语水平上.语言学家根据不同的理论对学习者所产生的错误有不同的分类方法。本文列举出学生普遍存在的错误典型并将之归纳为语言错误和语用错误,即是否违反了语言的结构规则:语法,词汇,(本文没有表述语音错误),还是违反了语言的使用规则:语言的使用时间,场合是否得体.通过分析错误,指出教学和学习中存在的问题。由此说明错误分析是十分必要的。 相似文献
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浅谈计算机硬件故障和日常维护 总被引:2,自引:0,他引:2
以家用电脑的维护为主对电脑硬件的维护和故障排除进行了简要分析。讲述电脑各个重要硬件维护的常见问题和解决办法。从实际问题入手,重点分析常出现问题的解决办法,行之有效的排除硬件问题。 相似文献
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《Information processing & management》2023,60(5):103476
Log parsing is a critical task that converts unstructured raw logs into structured data for downstream tasks. Existing methods often rely on manual string-matching rules to extract template tokens, leading to lower adaptability on different log datasets. To address this issue, we propose an automated log parsing method, PVE, which leverages Variational Auto-Encoder (VAE) to build a semi-supervised model for categorizing log tokens. Inspired by the observation that log template tokens often consist of words, we choose common words and their combinations to serve as training data to enhance the diversity of structure features of template tokens. Specifically, PVE constructs two types of embedding vectors, the sum embedding and the n-gram embedding, for each word and word combination. The structure features of template tokens can be learned by training VAE on these embeddings. PVE categorizes a token as a template token if it is similar to the training data when log parsing. To improve efficiency, we use the average similarity between token embedding and VAE samples to determine the token type, rather than the reconstruction error. Evaluations on 16 real-world log datasets demonstrate that our method has an average accuracy of 0.878, which outperforms comparison methods in terms of parsing accuracy and adaptability. 相似文献
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《Journal of The Franklin Institute》2001,338(2-3):203-223
Undesirable time-variable motions of dynamical structures (e.g. scales, balances, vibratory platforms, bridges and buildings) are mainly caused by unknown or uncertain excitations. In a variety of applications it is desirable or even necessary to attenuate these disturbances in an effective way and with moderate effort. Hence, several passive as well as active methods and techniques have been developed in order to treat these problems. However, employment of active techniques often fails because of their considerable financial costs. We propose an affordable control scheme which accounts for the above-mentioned deficiencies. In addition, we allow constraints on control actions. Furthermore, the number of control inputs (actuators) may be arbitrary, i.e., the system may be mismatched. The scheme is based on Lyapunov stability theory and, provided that the bounds of the uncertainties are a priori known, a stable attractor (ball of ultimate boundedness) of the structure can be computed. In case measurement errors or uncertainties, respectively, are significant, it is shown how the Lyapunov-based control scheme may be combined with a fuzzy control concept. The effectiveness and behavior of the control scheme is demonstrated on two simplified models of elastic structures such as a two story building and a bridge subjected to a moving truck. 相似文献
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Many control problems in process systems feature multi-objective optimization problems that involve several and often conflicting objective functions, such as economic profit and environmental concerns. In this paper, we consider a class of multi-objective model predictive control (MO-MPC) problems where nonlinear systems are subject to state and control constraints and multiple economic criteria are conflicting. Using the lexicographic optimization, we propose a prioritized MO-MPC scheme with guaranteed stability for economic optimization. At each sampling time, the MPC action is computed by solving a set of sequentially ordered single objective optimized control problems. Some sufficient conditions are established to ensure recursive feasibility and asymptotic stability of the MO-MPC in the context of economic criteria optimization. Two examples of multi-objective control of a coupled-tank system and a free-radical polymerization process are exploited to illustrate the effectiveness of the proposed MPC scheme and to evaluate the performance by some comparison experiments. 相似文献
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通过分析微机差动保护在变压器投运过程中经常出现差流的问题,运用向量法计算分析,提出了快速解决此类问题的办法,并进行了探讨. 相似文献