Voice Alarm System in Emergency Evacuation

Under emergency situations such as large fires, floods, hazardousmaterials, etc., incident commander have to manage an evacuation in help of alarm systems (audible or/and visual notification). This article reviewed selected literature relevant to ergonomics of alarm systems (esp. voice alarm system) in emergency evacuation, and occupants’ response behavior to the voice alarm. The literature cited is of world-wide origin, and is mainly from China,Canada and U.S.. At the end of the article, future directions in the research area are recommended

束缚和异氟烷麻醉对大鼠心率变异性及HPA轴影响的比较

目的为了观察束缚固定和异氟烷(流量:0.8 L,浓度:1.5%)麻醉状态中大鼠的心率变异性的变化;并通过比较9天每天30 min束缚干预和异氟烷麻醉对大鼠的体重、痛阈以及与HPA轴相关激素的影响,来评估长期使用异氟烷麻醉和束缚固定对大鼠应激程度的影响,选择更适宜的大鼠固定方法,为基础医学的实验方法提供重要的参考。方法 SD大鼠随机分为3组:空白组,束缚组,异氟烷麻醉组。急性实验通过记录大鼠心电图15 min,观察束缚固定和异氟烷麻醉情况下大鼠心率,心率变异性的变化。慢性实验中比较连续干预9天(30 min/d)前后3组大鼠体重、痛阈变化以及与应激状态相关激素含量的变化。结果 1)急性试验:与空白组大鼠相比,束缚干预和异氟烷麻醉均造成大鼠心率显著增加,具有统计学意义(P 0.05)。结论以上结果提示:低浓度的异氟烷造成麻醉中大鼠心率增加,心率变异性下降,产生以交感兴奋为主的自主神经功能状态改变。多次束缚固定易造成大鼠HPA轴激活,产生慢性应激的效应。在长期需要固定动物的实验中,与束缚固定相比异氟烷麻醉是更好的固定方法。国家自然科学基金(81674083

Effects of Low Energy Carbon Ion and Nitrogen Ion Implantation on Germinant Rate, Growth Weight and Peroxidase of Stevia rebaudiana Bertoni

以经过碳、氮 (75× 1 0 14 ke V/ cm2 )离子注入处理后的甜叶菊 (Stevia rebaudianaBertoni)种子为材料 ,研究低能离子注入对甜叶菊萌发率、生长量及过氧化物同工酶的影响。结果表明 :(1 )萌发期处理组的萌发率低于对照 ,萌发延迟 ,幼苗成活率不及对照组 ;萌发后期处理组的相对生长量、过氧化物酶活性高于对照组。 (2 )幼苗移至实验地种植后 ,处理组幼苗长势明显优于未处理组 ,处理组 60 d蕾株比明显高于对照组。 (3)过氧化物酶同工酶谱分析发现 ,对照组具有完整 6条基本带的植株数为 1 2 ,具有完整 B1、B2基本带的植株数为 2 0 ;C+处理组分别为 5和 1 1 ,N+处理组分别为 5和 6。统计发现低能离子的注入影响最大的是同工酶谱 B1、B2带。 N+处理组生物学负效应大于 C+处理组The paper reports the effects of low energy Carbon and Nitrogen ion (75×10 14 keV/cm 2 )implantation into S. rebaudiana seeds.on germinant rate, relative growth weight and peroxidase of S. rebaudiana. The results showed: (1)The seed germinant rates were lower and seeding servival rates and deve lopment speeds were slower in the treated groups than those in the control in the initial period of seed germinating;but in the late period of seed germinating the relative growth weight and peroxidase activity were higher in treated groups than those in the control.(2)When seedings were transplanted into experimental field the growth and development were speeded up in treated groups than that in the control.The rate of flower bud plants were higher in treated groups than that in the control. (3)The isozymogram of peroxidase by PAGE showed that there were 12 plants which had 1～6 basic bands and 20 plants which had B1,B2 bands in the control,but only there were 5 plants and 11 plants, respectively, in C + treated groups,and there were 5 plants and 6 plants, respectively, in N + treated groups. The result also showed there were more negative effects by ion implantation into S. rebaudiana in N + treated groups than those in C + treated groups in the periods of seed germinating and plant growth.国家基金委重大项目资助课题!( 1 9890 30 0

Analysis of the Content of Stevia Sweeteners by Capillary Zone Electrophoresis

本文介绍了一种用毛细管区带电泳法筛选甜菊糖苷突变体的有效方法。根据实验结果 ,优化的电泳条件为 :60mmol/LTris 硼酸缓冲液 (pH 8.0 ) ,柱温 30℃ ,工作电压 2 5kV。优化条件下 ,甜菊苷 (Ste vioside)迁移时间的R .S .D为 0 .45% (1 5次 ) ,且在 7.45× 1 0 - 5～ 1 .74× 1 0 - 2 mol/L的浓度范围内存在良好的线性关系 (r=0 .9994) ,甜菊主要糖苷在 5min内均可实现分离。在优化条件下 ,本实验研究了低能离子注入后甜菊主要糖苷含量变化 ,结果令人满意。This paper introduced an effect capillary zone electrophoresis method for screening of stevia mutation. According to the experimental results, the optimum separation conditions were selected as: 60 mmol/L Tris tetraborate buffer of pH 8.0, 30 ℃ and 25 KV. Under optimum conditions, the R.S.D. of stevioside migration time for 15 runs was 0.45%. The detector response for stevioside was linear over the range of 7.45×10 -5 ～1.74×10 -2 mol/L (r=0.9994). Stevia main sweeteners cound be separated effectively in less than five minutes. This method was applied for determining the variation of stevia main sweeteners after low_energy ions implantation

粗糙铂电极上甲酸吸附氧化的电化学原位表面增强拉曼光谱研究

采用循环伏安法和电化学原位表面增强拉曼光谱 (SERS)技术研究甲酸的解离吸附与氧化行为 .首次报道了甲酸吸附、解离和氧化的电化学原位SERS谱 ,发现甲酸在粗糙铂电极上能自发解离吸附 ;首次成功地获得了粗糙铂电极上甲酸吸附解离的强吸附中间体CO和活性中间体COOH的表面增强拉曼光谱 ,同时首次检测到甲酸氧化最终产物CO2 的拉曼光谱信号 ,从分子水平证实甲酸解离吸附反应的双途径机理

In-situ SERS study on the electro-oxidation with HCOOH on a roughened platinum electrode

The dissociative adsorption and oxidation behavior of HCOOH on Pt was investigated by cyclic voltammogram (CV) and in-situ surface enhanced Raman spectroscopy (SERS) techniques. The in-stiu SERS of HCOOH adsorption, dissociation and oxidation on rough Pt is reported. It is found that HCOOH can spontaneously dissociate. The surface Raman spectra of CO, the strongly adsorbed intermediate and COOH, the weakly adsorbed intermediate of the dissociative adsorption of HCOOH were successfully obtained for the first time. At the same time, the Raman spectra of the finally oxidized product CO2 of HCOOH was also firstly detected. The dual path reaction mechanism for the oxidation of HCOOH was confirmed at molecular level

情绪信息的多通道整合

自然环境中人类情绪信息的交流是依靠多个感觉通道实现的,多通道整合是情绪加工的基础。近年来的行为学、电生理学与神经成像的研究表明,情绪信息的加工具有跨通道自动整合的特点,它发生在认知加工的早期阶段,与颞上回、颞中回、海马旁回和丘脑等脑区密切相关。不同情绪的整合既有共同的神经基础,又有各自独特的加工区域。情绪信息的整合机制还可能与加工类型及注意资源有关。在未来研究中,实验的标准化、动态化、自然化有助于提高研究的准确性和研究间的可比性,而对特殊群体的研究,以及综合研究情绪加工与注意等其他认知过程则有助于我们进一步探索多通道整合的神经机制

一种基于模拟驾驶的心理负荷测量系统

本发明提供一种基于模拟驾驶的心理负荷测量系统，包括用于生成模拟驾驶场景的模拟场景显示模块、用于执行模拟驾驶动作的模拟驾驶模块、用于对模拟驾驶过程中的心理状态进行检测的心理状况记录模块；其中，模拟驾驶模块包括对用户的驾驶行为进行记录的数据采集装置；模拟场景显示模块根据预先设定的驾驶任务显示模拟驾驶场景，用户根据模拟驾驶场景在模拟驾驶模块上进行驾驶操作，数据采集装置采集并记录用户的模拟驾驶行为，并将与模拟驾驶行为有关的数据反馈到模拟场景显示模块，以实时更新模拟场景显示模块所显示的驾驶场景；与模拟驾驶行为有关的数据还被发送到心理状况记录模块，心理状况记录模块检测用户在不同路况和任务难度下的心理负荷

The Multisensory Integration of Emotional Information

自然环境中人类情绪信息的交流是依靠多个感觉通道实现的,多通道整合是情绪加工的基础。近年来的行为学、电生理学与神经成像的研究表明,情绪信息的加工具有跨通道自动整合的特点,它发生在认知加工的早期阶段,与颞上回、颞中回、海马旁回和丘脑等脑区密切相关。不同情绪的整合既有共同的神经基础,又有各自独特的加工区域。情绪信息的整合机制还可能与加工类型及注意资源有关。在未来研究中,实验的标准化、动态化、自然化有助于提高研究的准确性和研究间的可比性,而对特殊群体的研究,以及综合研究情绪加工与注意等其他认知过程则有助于我们进一步探索多通道整合的神经机制