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刘兴杜 《北京工业职业技术学院学报》2004,3(4):45-48,52
把复杂电路中三角形与星形联接等效变换原理引入矿井复杂通风网络的研究,导出解复杂风网的等效变换公式,并运用成功.以往的解算基本上是迭代逼近法,本法则解决了复杂风网风量自然分配的直接计算问题,因而过程简便,同时也使矿井复杂通风网络的化简成为现实.该方法除了适用矿井通风外,还有可能适用于其它领域相关的解算. 相似文献
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Some philosophers of education think that there is a pedagogically informative concept of training that can be gleaned from Wittgenstein's later writings: training as initiation into a form of life. Stickney, in ' Training and Mastery of Techniques in Wittgenstein's Later Philosophy: A response to Michael Luntley' takes me to task for ignoring this concept. In this essay I argue that there is no such concept to be ignored. I start by noting recent developments in Wittgenstein scholarship that raise serious issues about how we should handle the translation of Arbrichtung and arbrichten. I then concentrate on the substantive philosophical issues about the very idea that training can have a pedagogically productive role in education. I show that what work training does is a function of the prior skill set of the trainee. This means that we have to endorse some form of rationalism and acknowledge that the learner can only respond to training if they already possess sufficient mental equipment to generate the appropriate responses. 相似文献
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Anton J. Slagers Inge van den Akker-Scheek Jan H. B. Geertzen Johannes Zwerver Inge H. F. Reininga 《Journal of sports sciences》2013,31(21):2499-2505
ABSTRACTThe ACL-Return to Sport after Injury (ACL-RSI) and Injury-Psychological Readiness to Return to Sport (I-PRRS) scales were developed to assess psychological factors associated with return to sports. Validity and reliability have been determined. The aim of this study was to investigate the responsiveness of the Dutch ACL-RSI and I-PRRS. Seventy patients with ACL reconstruction completed both scales twice 2 months apart, plus a Global Rating of Change (GRC) questionnaire. Distribution and logistic regression-based methods were used to study responsiveness. The Standardized Response Mean (SRM) for the ACL-RSI was 0.3 and for the I-PRRS 0.1, indicating low responsiveness. The minimally important change (MIC) for ACL-RSI was 2.6 and for the I-PRRS 0.9. Since the standard error of measurement (SEM) and smallest detectable change (SDC) were larger than MIC in individual patients, it does not seem possible to distinguish minimally important changes from measurement error in individual patients with either scale. At the group level responsiveness seemed sufficient; hence, both scales can be used to investigate the effectiveness of an intervention at the group level. Both scales can also be used in cross-sectional research and in clinical practice as screening instruments to identify patients at risk of not returning to sports. 相似文献
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有关口语报告法效度的几个争议问题 总被引：1，自引：0，他引：1
张裕鼎 《宁波大学学报(教育科学版)》2007,29(6):25-28
尽管口语报告法在当前心理学、教育学以及认知科学的研究中被广泛使用,但关于其效度的争议依然存在。这些争议主要包括:第一,口语报告的准确性,即口语报告能否准确地反映我们的思维内容?第二,口语报告的完整性,即搜集到的口语报告能否为我们了解被试的认知过程提供足够的信息?第三,口语报告的反应性,即口语报告是否会影响思维的正常进程?文章对这些问题进行了较为深入的分析和思考,并指出了对口语报告法进行研究的几个新趋势。 相似文献
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Modern high-security cryptography and optical communication call for covert bit sequences with high coding capacity and efficient authentication. Stimuli-responsive lasing emissions with easily distinguishable readout are promising in the coding field as a novel cryptographic primitive, while the application is frequently restricted by the limited number of emission states. Here, we report a strategy of achieving multiple competitive lasing signals in responsive organic microspheres where a donor–acceptor pair was introduced. The competitive lasing from the donor and acceptor was reversibly switched by modulating the competition between the radiative rate of the donor and the rate of energy transfer, and the generated multiple lasing signals enabled a quaternary coding for recognizable cryptographic implementation. Data encryption and extraction were demonstrated using a 4 × 4 microlaser array, showing vast prospects in avoiding the disclosure of security information. The results offer a comprehensive understanding of excited-state dynamics in organic composite materials, which may play a major role in high-security optical recording and information encryption. 相似文献
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Timothy P. Mottet Steven A. Beebe Paul C. Raffeld Michelle L. Paulsel 《Communication quarterly》2013,61(4):421-436
The purpose of this study was to examine the effects of student responsiveness on teachers granting relational power to students, and to determine if this power influenced how teachers evaluated student essays. Rather than student verbal and nonverbal responsiveness interacting, student nonverbal responsiveness significantly impacted the coercive, reward, and referent power that teachers granted students. Student verbal and nonverbal responsiveness affected the expert power that teachers granted students. Nine to 18% of the variance in relational power was attributed to student responsiveness. Additionally, student referent power significantly predicted teachers’ evaluation of student essays accounting for 11% of the variance. 相似文献
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Lawrence R. Wheeless Ann Bainbridge Frymier Catherine A. Thompson 《Communication quarterly》2013,61(2):102-115
This study tested relationships among verbal output, behavioral receptivity, attraction, and communication satisfaction in a variety of longer and shorter term relationships of differing levels of liking. Two behaviorally referenced reports on others were developed to measure perceived behavioral output and perceived behavioral receptivity. The study tested hypotheses within the attraction paradigm. Results generally supported the notion of an important reinforcement value of high behavioral receptivity and moderate verbal output. Substantial proportions of highly verbal people appeared to be below average in receptivity. 相似文献
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本文首先运用计划行为理论和信息交换理论分析得出,个性化需求预测在获取预测所用信息阶段的主要挑战是“如何帮助顾客将其拥有的与需求相关的隐性信息转换成显性信息”,并提出了应对该挑战的方法“开发需求相关隐性信息转换系统”;然后运用“自我推理”和“错误一致性效应”等理论分析得出,在理解需求相关信息阶段的主要挑战是“制造商在理解顾客需求相关信息时,如何避免自我推理和错误一致性效应”,基于认知图作用的分析,提出了应对该挑战的方法“充分运用描述顾客价值系统的认知图理解顾客需求相关信息”;将顾客需求相关信息转换成预测信息阶段的主要挑战是“如何提高预测精度”,运用锚定一调整过程理论、信念更新范式理论、状态依赖性理论和记忆可接近性优势理论分析得出,制造商采取以顾客前一次购买订单所含信息为起始点的净变预测方式实现基于属性的预测,将有助于提高个性化需求预测的预测精度。 相似文献
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光电探测系统的设计原理及应用 总被引：2，自引：0，他引：2
该文根据“非典”时期红外测温仪的应用，讨论了光电系统的设计思想和基本原理及应用。 相似文献