Cross-task emotion recognition using eeg measures: first step towards practical application

Electroencephalographic (EEG)-based emotion recognition has received increasing attention in the field of human-computer interaction (HCI) recently, there however remains a number of challenges in building a generalized emotion recognition model, one of which includes the difficulty of an EEG-based emotion classifier trained on a specific task to handle other tasks. Little attention has been paid to this issue. The current study is to determine the feasibility of coping with this challenge using feature selection. 12 healthy volunteers were emotionally elicited when conducting picture induced and video induced tasks. Firstly, support vector machine (SVM) classifier was examined under within-task conditions (trained and tested on the same task) and cross-task conditions (trained on one task and tested on another task) for picture induced and video induced tasks. The within-task classification performed fairly well (classification accuracy: 51.6% for picture task and 94.4% for video task). Cross-task classification, however, deteriorated to low levels (around 44%). Trained and tested with the most robust feature subset selected by SVM-recursive feature elimination (RFE), the performance of cross-task classifier was significantly improved to above 68%. These results suggest that cross-task emotion recognition is feasible with proper methods and bring EEG-based emotion recognition models closer to being able to discriminate emotion states for any tasks.     

腔内修复治疗累及左锁骨下动脉的主动脉夹层动脉瘤

【摘要】 目的 探讨累及左锁骨下动脉的主动脉夹层动脉瘤腔内修复治疗的手术方式及疗效。 方法 回顾性分析2004年1月至2014年12月采用不同腔内修复术式治疗56例主动脉夹层动脉瘤患者临床资料，其中男42例，女14例。采用“烟囱”技术重建左锁骨下动脉血流26例（A组），分支支架技术重建10例（B组），复合手术重建20例（C组）。术中使用国产覆膜支架26例，进口覆膜支架30例；全身麻醉48例，局部麻醉8例。结果 手术全部成功（100%），无手术死亡患者。A组植入裸支架11例，覆膜支架15例；C组4例先植入胸主动脉覆膜支架，直接覆盖左锁骨下动脉，再作腋-腋动脉人工血管旁路移植术；16例先作腋-腋动脉人工血管旁路移植术，再行主动脉腔内修复覆盖左锁骨下动脉。3组患者出院时CTA检查显示支架形态均良好，无明显移位，组间差异无统计学意义（P＞0.05）。内漏发生在A组有4例（15.4%），B组1例（11%），C组1例（5%），组间差异均无统计学意义（P＞0.05）。52例（92.9%）患者获平均23.5个月随访，死亡5例（9.6%），原因为心肌梗死（2例）、肿瘤（3例）。47例CTA随访发现6例仍有部分内漏，24例远端胸腹主动脉仍有夹层但未扩大，未作特殊处理，目前均在随访中。结论 “烟囱”技术、分支支架技术和复合手术修复治疗累及锁骨下动脉的主动脉夹层动脉瘤是安全有的。
     

汽车用压缩天然气金属内胆纤维环缠绕气瓶的安装监督检验与质量控制

近些年,伴随国家对清洁能源和环境污染的重视,天然气汽车以其绿色排放、成本低廉等优点发展迅速,车用气瓶的需求量也与日俱增。车用气瓶安装是天然气汽车的质量安全环节中极其重要的一个方面,对其进行监督检验是保证天然气汽车安装质量和使用安全性的必要监督管理。通过对安装监检的重要性及现状、重点问题、应注意的问题、质量控制与建议等进行叙述分析,说明了安装监督检验的重要性。     

浙江农宅平面信息域统计分析——以绍兴市为例

为探究长三角地区农宅平面尺寸在宏观区域上的统计规律,基于Google Earth探向功能,以长、宽作为农宅平面尺寸的标示参量,应用频数统计法分析农宅长、宽在环向及径向分析路径上的频数分布特征。统计结果表明:不管是在环向,还是在径向上,农宅长度都是以3到4个自然开间尺寸的占比最大,农宅宽度都是以2到3个自然开间尺寸的占比最大;在环向上,各区域农宅长度、宽度的频数分布较为相似,且其主要占比区间相对稳定,农宅长度在3到4个自然开间尺寸所占比例约为51%,宽度以2到3个自然开间尺寸为主,其比例为70%左右;在径向上,各区域农宅平面尺寸在各开间的比例差异较大。上述方法与结论对区域视角下的农宅节能潜力分析及既有建筑节能改造策略等问题的研究具有方法借鉴与理论指导意义。     

沿空留巷技术在缓倾斜煤层炮采工作面开采中的应用

介绍了唐洞煤矿在缓倾斜炮采工作面应用砌筑矸石墙和留小护巷煤柱2种留巷方式的工程实践,阐述了2种留巷方式的工艺流程和要求,采用极限平衡理论计算得到2244工作面顺槽合理的最小煤柱宽度为2.8m.通过对留巷工艺巷道变形的监测及掘进工期、煤炭回收率的计算分析,结果表明,这2种沿空留巷技术能有效的控制巷道的变形,在矿井生产中能实现减少巷道掘进工程量、缓解采掘接替压力、提高煤炭回收率,取得了显著的技术经济效益;为类似条件的煤矿沿空留巷提供了有益的借鉴.     

Distribution law of flow field and temperature field in electroslag remelting withdrawal process

A three- dimensional mathematical model was developed to describe the interaction of multiple physical fields during the electroslag remelting withdrawal (ESRW) process. Flow fields and temperature fields of the ESRW system were simulated by commercial software ANSYS. The flow fields, temperature fields and the shapes of the molten pool during the ESRW process with different electrode immersed depths and slag heights were analyzed and compared. The temperature of ingot surface was measured, and the accuracy of simulation results was verified. The results show that there are two pairs of vortexes in slag bath during the ESRW process. A pair of large vortexes turns counterclockwise, and another pair of small vortexes rotates clockwise. The speed of slag increases with the increasing of immersion depths of the electrode, and decreases with the increasing of slag heights. There are two high temperature zones in the slag bath, and the temperature in the slag bath is higher than that in the metal bath. The temperature of ESRW system (electrode, slag bath and ingot) becomes higher with the increasing of immersion depths of the electrode, whereas becomes lower with increasing of slag heights.     

旁路开关用CYA8G大功率液压弹簧操动机构试制

笔者介绍LW□-1100型支柱式双断口高压交流旁路开关用CYA8G大功率液压弹簧操动机构的设计及试制,说明在设计及试制过程中旁路开关及其操动机构与普通断路器及其操动机构依据的标准不同,从而导致设计思想及设计基准不同。差别主要体现在操作循环和对合闸动作及特性的要求上,根据要求的特点,采用了反向操作旁路开关的方法,技术性能达到了设计时的预想要求,试验结果符合标准和产品技术规范的要求。     

贝加莱PCC在调车绞车中的应用

在传统调车提升机PLC电控系统的基础上,提出了利用贝加莱PCC来对调车提升机进行控制。通过PCC性能特点的介绍,表明新型调车提升机具有良好的应用及推广价值。     

高速公路绿化工程监理工作浅议

本文根据高速公路绿化工程特点，对高速公路绿化施工各阶段的监理工作进行了讨论，以期对高速公路绿化工程监理工作水平的提高有所裨益。