不同环境驱动下的外语学习者自主——基于重庆大学与利兹大学的对比研究

自主意识、学习动机、学习策略、网络学习环境和教师自主是实现学习者自主的必要条件。通过对重庆大学和英国利兹大学不同环境驱动下的学生在实现学习者自主过程中差异的对比分析,我们发现影响中国大学生自主能力发展的主要障碍是自主意识多于自主行动、融合型学习动机欠佳、学习策略使用目的性不强,网络学习资源利用不充分以及推动自主的力度不够。学习者自主的实现首先是将自主意识转化为有意识的自主行为,再者是有目的的学习策略使用,创造独立学习和合作学习的条件,还需要教师教学观念和角色的转变,以及学校教育机制的创新和学习环境的支持。     

面向新型配电网的能观性分析与精细化协同规划方法

现代控制理论和电力系统状态估计中的能观性定义难以满足配电网态势感知的需求,配电网规划模型中也缺乏对能观指标的考虑,为此,提出面向新型配电网的能观性分析与精细化协同规划方法。对配电网的变量与状态空间模型进行定义,并根据传统能观性定义对配电网中的传统/新型变量进行能观性分析;基于传统能观性定义的缺陷提出新的配电网能观性和能观指标定义,并建立考虑能观性的配电网精细化协同规划模型。算例分析结果表明,所提规划方法考虑了实际量测误差的影响,实现了一次网架规划和二次态势感知设备配置的综合最优,达到了经济性和能观性的平衡。     

基于认知无线电抗干扰技术分析

认知无线电作为抗干扰有效措施之一,可以提高通信系统在日益复杂的战场通信环境下的适应能力。与传统的抗干扰手段相比,基于认知无线电的抗干扰技术具有更强的灵活性、适应性和鲁棒性,在军事通信领域越来越受到重视。论述了基于认知无线电的抗干扰系统架构,阐述了认知设备各模块的功能,对宽频带实时频谱感知、频谱动态分配和自适应参数优化调整等关键技术进行了分析。     

计算机技术在篮球攻防意识培养的应用思考

篮球教学在高校体育课程体系中占有重要的地位。文中在长期的高校篮球教学的基础上,描述了篮球运动在高校开展的一般情况,提出了篮球攻防意识的概念,提出利用计算机技术手段培养篮球攻防意识,以期达到提高高校篮球教学效果、增强学生篮球攻防意识和兴趣的作用。     

浅议化工安全生产与管理

通过化工企业安全管理工作的重点分析,结合工作实践,针对安全意识、制度管理、现场隐患排查、规范操作行为、夯实班组建设、总结管理经验提出了建议和措施,对相关化工企业安全管理具有促进和借鉴意义。     

FCC汽油后加工技术滞后与MTG的发展机遇

针对我国FCC汽油高硫、高烯烃、低芳烃和高辛烷值组分不足,现阶段后加工技术研究与应用相对滞后,甲醇产能严重过剩以及甲醇制汽油优于煤液化的实际,提出推广和发展MTG项目的建议.     

海战场赛博空间态势感知能力定量分析

海战场赛博空间态势感知包括感知层、理解层和预测层3个层级,感知层体现为信息域能力,理解层和预测层体现为认知域能力。分别提出了信息域和认知域能力的度量方法,其中信息域能力的度量是通过构建完备性、准确性、时效性3个指标,来衡量战场态势与输出态势的差异,认知域能力的度量采取德尔菲法,得出了海战场赛博空间态势感知能力的度量方法...     

Adaptive Multimodal In‐Vehicle Information System for Safe Driving

This paper proposes an adaptive multimodal in‐vehicle information system for safe driving. The proposed system filters input information based on both the priority assigned to the information and the given driving situation, to effectively manage input information and intelligently provide information to the driver. It then interacts with the driver using an adaptive multimodal interface by considering both the driving workload and the driver's cognitive reaction to the information it provides. It is shown experimentally that the proposed system can promote driver safety and enhance a driver's understanding of the information it provides by filtering the input information. In addition, the system can reduce a driver's workload by selecting an appropriate modality and corresponding level with which to communicate. An analysis of subjective questionnaires regarding the proposed system reveals that more than 85% of the respondents are satisfied with it. The proposed system is expected to provide prioritized information through an easily understood modality.     

Perceptual load alters visual excitability.

Increasing perceptual load reduces the processing of visual stimuli outside the focus of attention, but the mechanism underlying these effects remains unclear. Here we tested an account attributing the effects of perceptual load to modulations of visual cortex excitability. In contrast to stimulus competition accounts, which propose that load should affect simultaneous, but not sequential, stimulus presentations, the visual excitability account makes the novel prediction that load should affect detection sensitivity for both simultaneous and sequential presentations. Participants fixated a stimulus stream, responding to targets defined by either a color (low load) or color and orientation conjunctions (high load). Additionally, detection sensitivity was measured for a peripheral critical stimulus (CS) presented occasionally. Increasing load at fixation reduced sensitivity to the peripheral CSs; this effect was similar regardless of whether CSs were presented simultaneously with central stimuli or during the (otherwise empty) interval between them. Controls ruled out explanations of the results in terms of strategic task prioritization. These findings support a cortical excitability account for perceptual load, challenging stimulus competition accounts. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

浅析环保设备的企业价值

随着社会经济的不断发展,经济与环境的矛盾也日益突出,企业的环境意识、员工的健康及环境管理模式已引起越来越多的关注。环保设备正在逐渐走入企业,本文主要介绍中色沈阳冶金机械有限公司引进的RCL无泵水幕喷漆室设备对于公司各个方面的价值及设备的工作原理及特点。加强对环保设备的认识,增强环保意识。