清代晋北的农田水利建设与环境初探

清代晋北进入了一个相对稳定时期,在传统农业社会体制下,以农为本政策必然使晋北的农业有了一个跨越式发展,相应的农业发展在干旱半干旱地区必须要有配套的农田水利设施建设,那么清代晋北的农田水利建设状况如何,有何特点,它与当地的环境关系如何?文章从这几个方面对清代晋北的水利建设进行研究.     

基于网络环境下的自我管理学习能力对外语学习的作用

自我管理学习是网络信息时代学习的主导方式之一。它是自我组织和控制认知行为的活动,是学习者完成对学习的自我评估、自我反思和自我管理过程。通过探讨自我管理学习能力对外语学习的作用,旨在激发学习动力,提高外语学习效果。     

论欠发达地区经济发展与生态环境优化整合

在社会经济发展不同阶段,人们对经济效益与生态效益有不同的评价值。由于发展经济的巨大张力和脱贫致富的巨大压力,欠发达地区人们往往牺牲生态效益来换取经济效益。从欠发达地区的历史与现状出发,大力发展生态产业,完善社会保障机制,加强生态文化建设,在造就新的更有利可图的生产方式的同时提升人们保护生态环境的主体精神,是实现欠发达地区经济跨越式发展与生态环境优化整合的现实路径。     

对美术欣赏教学评价的思考和探究

文章以提高学生对形式的审美感知水平和对形式意味的直觉能力为宗旨,提出对实际作品进行多维的和有效的审美评价,是达到这一宗旨的唯一途径。     

深基坑工程风险评估的决策支持系统

对深基坑工程风险评估进行了讨论，分析决策支持系统的逻辑结构，认为将决策支持技术应用于深基坑工程风险评估，可以解决决策方案模糊性、决策目标冲突性以及结构不良等问题，提高科学决策水平。     

Does the FRN in brain potentials reflect motivational/affective consequence of outcome evaluation?

Electrophysiological studies have utilized event-related brain potentials (ERPs) to investigate neural processes related to the evaluation of the outcome of behavioral performance or to the evaluation of external feedback. The feedback-related negativity (FRN) in brain potentials has been shown to be sensitive to information indicating monetary loss or negative feedback. Since monetary loss usually indicates both the consequence of previous performance and the reward value of stimuli, it is controversial whether the FRN reflects the cognitive process of error detection per se and/or the motivational/affective process related to the subjective evaluation of the error. This study manipulated the motivational/affective significance of negative feedback by penalizing errors in a context-dependent way in a line judgment task. Participants could lose more money in the loss incentive condition or win less money in the win incentive condition if their subsequent judgment of line segments was less accurate, whereas they could receive performance feedback but without monetary incentive in the neutral condition. Results showed that the size of the FRN effect as well as the size of the P300 effect, as assessed by comparing brain responses to the error trials with the responses to the correct trials, increased linearly over the loss, neutral, and win conditions, suggesting that the FRN is sensitive to the motivational/affective evaluation of the performance outcome.     

Transient reconnection caused by non-homogenous dynamic pressure

It is proposed that local and transient reconnection in the plasma boundary layer can be caused by the impact and switch-off of non-homogenous dynamic pressure. Magnetohydrodynamic simulation is used to investigate the reconnection processes in these two cases. It is found that if the inflow is homogeneous, the reconnection will not take place; if the inflow is a shearing flow, no matter how great the shear of the flow is, the reconnection can be caused either during or after the impacting period. It is pointed out that a sudden stop of external force may be an important triggering mechanism of energy transformation and reconnection in the plasma boundary layer region.     

海南旅游业发展与生态环境的关系研究

在简要介绍海南旅游资源的优势和海南旅游业发展现状的基础上 ,采用统计分析方法 ,以定量与定性研究相结合的方式 ,对海南省旅游业发展的区域性特点、旅游业发展与环境 ,以及旅游业发展与农业的关系等问题进行初步探讨 ,针对性地提出实现海南旅游业可持续发展的一些对策和建议 .     

Assessing the Pilling of Fabric by Image Analysis

In this paper, firstly, the image of pilling was pre - pro-cessed by image analysis technique, which based on the image's gray- scale statistical characters or mathemati-cal morphology. Then, the pilling of fabric was assessed synthetically by the size of pilling A,number of pilling N and morphology of pitting S. At the end, we tested the practicability of this method by testing knitgoods as a sample, and the result was satisfiable.     

欧美企业战略理论研究的一些新进展述评

简要地述评欧美四位学者最近的研究成果。它们代表着企业战略理论研究的新方向，对我们具有一定的借鉴价值。其中，Ｃｈａｋｒａｖａｒｔｈｙ教授强调企业环境是动荡的，并提出对付动荡的战略框架；Ｂａｒｏｎ教授强调非市场环境对企业活动的重大影响作用，提出了非市场战略系统和租金链概念框架；Ｍｉｌｓ教授归纳总结了美国的大公司近年来战略失败的主要原因；Ｋｒｅｉｋｅｂａｕｍ教授则一般性地论述了战略计划进一步发展的方向