Severe motor disability affects functional cortical integration in the context of brain-computer interface (BCI) use

The purpose of this study was to investigate cortical interaction between brain regions in people with and without severe motor disability during brain-computer interface (BCI) operation through coherence analysis. Eighteen subjects, including six patients with cerebral palsy (CP) and three patients with amyotrophic lateral sclerosis (ALS), participated. The results showed (1) the existence of BCI performance difference caused by severe motor disability; (2) different coherence patterns between participants with and without severe motor disability during BCI operation and (3) effects of motor disability on cortical connections varying in the brain regions for the different frequency bands, indicating reduced cortical differentiation and specialisation. Participants with severe neuromuscular impairments, as compared with the able-bodied group, recruited more cortical regions to compensate for the difficulties caused by their motor disability, reflecting a less efficient operating strategy for the BCI task. This study demonstrated that coherence analysis can be applied to examine the ways cortical networks cooperate with each other during BCI tasks. PRACTITIONER SUMMARY: Few studies have investigated the electrophysiological underpinnings of differences in BCI performance. This study contributes by assessing neuronal synchrony among brain regions. Our findings revealed that severe motor disability causes more cortical areas to be recruited to perform the BCI task, indicating reduced cortical differentiation and specialisation.     

高职院校建立顶岗实习学生管理平台的思考

针对新形势下高校毕业生求职就业时存在的常见法律问题,在分析高校就业法制教育工作缺失的基础上,提出了关于从就业法制知识普及、就业法律问题发现、就业法律困难援助、就业法制教育保障等四方面建立健全高校就业法制教育工作机制的构想。     

移动无线传感网络节点协同避障的改进方法

传统蜂拥控制模型在协同避障跟踪方面,目前有Reynolds和Tanner的蜂拥模型。笔者曾对其做出了改进,提出了与Steer to Avoid法则相结合的避障模型,该模型在跟踪过程中对凸形障碍有较高的避障效率。由于在Steer to Avoid的方向判断中,目标对节点具有引力,使节点群陷入凹形区域无法绕出。将协同避障模型引入凹形障碍环境中,对模型进一步改进,在Steer to Avoid转向判断时暂时取消目标对节点群的引力,让节点群在进入凹形后自行做出环境的判断并沿着障碍边缘不断搜索路径,最终绕出障碍到达目标。仿真实验结果表明：与传统两个模型相比,该模型在避障的平均速率和时间效率上有显著提高,适用于避开未知的凹形障碍。     

Coordination in networks: An economic equilibrium analysis

Networks utilizing modern communication technologies can offer competitive advantages to those using them wisely. But due to the existence of network effects, planning and operating cooperation networks is difficult. In this paper, the strategic situation of individual agents deciding on network participation is analysed. A systematic equilibrium analysis using computer-based simulations reveals principal solution scenarios for network agents and shows that network cooperation problems might frequently be not as difficult to resolve as often feared. In particular, strategic situations are identified showing that a majority of individuals might be better off getting the optimal solution from a central principal and that in many cases simple information intermediation can solve the start-up problem notorious in network economics.     

A Synthesis of Relationship between Trust and Knowledge Transfer-in the View of Organization Cooperation

Based on the organization cooperation, from the perspective of variable correlation and variable proper ties, this paper describes the research result on relationship between trust and knowledge transfer, in which the elements correlation research is broken down relationship between trust and knowledge transfer, correlation of trust, knowledge transfer and performance relationship, and the interrelationships of trust, knowledge transfer and multiple factors. For trust perspective. There are two structural dimensions of trust： antecedents and media ting variables. Combining the literature at home and abroad in recent years, the existing research results are summed ul and the future research directions are nronosed.     

基于领域知识的多智能体分层协作规划方法

针对复杂动态RoboCup仿真环境下的多智能体协作问题,提出一种使用领域知识的多智能体分层协作规划方法。在根据系统提供的环境状态信息建立智能体初始行为规划的基础上,通过逐步填入智能体的状态和行为特征属性知识,分析行动实现的效果,对初始规划行动进行调整,为智能体制定协调一致的行为规划序列,并获得相应的协作策略信息,使其在实际对抗比赛中能针对当前环境快速做出决策,实现通信受限的情况下多智能体的协作。     

中国网通的渠道建设浅析

阐述营销渠道相关概念，着重分析中国网通渠道模式特点，为中国网通的渠道管理(代理商管理)提出了一系列办法，得出最终赢得用户、占领市场的式关键是对代理商的有致管理及与其的顺畅合作的结论。     

我国石油企业跨国经营战略探讨

进入９０年代以来,世界各跨国石油公司竞相进行战略调整,力求提高公司的竞争能力。面临复杂多变,竞争激烈的国际环境和我国已成为石油进口国的情况,中国石油天然报总公司应实施跨国经营战略：有选择性地进行海外油气资源勘探开发,为我国的石油进口建立稳定的海外供应基地;通过石油上,下游一体化经营和“一揽子资源”输出,有选择性地进入国际油气资源市场,专业技术与劳务市场,油气产品市场;积极利用国内外资金,开展对外直     

按阻抗原理特殊配置的220kV变压器保护应用

在详细分析220 kV和110 kV变压器的容量不相匹配,以及采用常规保护配置与整定方法可能引发220 kV主变压器110 kV侧后备保护越级跳闸,造成大面积停电事故的基础上,研究并提出220 kV主变保护中的相应后备保护改用距离原理保护而其他保护保留的特殊配置的解决方案。对该解决方案进行了分析和计算,提出在不同情况下对距离保护的整定策略。研制了按阻抗原理配置的220 kV变压器保护装置,进行了静态模拟和动态模拟试验,结果表明,该保护装置是有效和可行的,取得了上下级保护相互配合的预期效果。     

无分裂结构的二维小波变换图片处理芯片设计与验证

5/3小波变换硬件实现常用结构是先完成分裂,再依照分裂后的数据完成预测部分和更新部分的变换,这需要复杂的控制结构。在此采用JPEG2000推荐的5/3小波变换公式,在基于行的列变换基础上提出了一种全新的无数据分裂的结构。该结构放弃地址寻址的数据读取模式,采用读取一维数据流节点的输入方式,从对应的寄存器中读取在多个寄存器中依次流动的数据,省略了数据输入的地址控制模块。由于减少了数据分裂步骤,并且无需控制预测及更新步骤的交替进行,因此简化了小波变换控制系统的结构。在此运用软硬件协同的验证方法,利用计算机软件和FPGA结合,完成图片从计算机端输入,在FPGA中完成小波变换,并输出到计算机显示器上显示的步骤。