Fast Positive Feedback Between the Adrenocortical Stress Response and a Brain Mechanism Involved in Aggressive Behavior.

Aggressive behavior induces an adrenocortical stress response, and sudden stressors often precipitate violent behavior. Experiments in rats revealed a fast, mutual, positive feedback between the adrenocortical stress response and a brain mechanism controlling aggression. Stimulation of the aggressive area in the hypothalamus rapidly activated the adrenocortical response, even in the absence of an opponent and fighting. Hypothalamic aggression, in turn, was rapidly facilitated by a corticosterone injection in rats in which the natural adrenocortical stress response was prevented by adrenalectomy. The rapidity of both effects points to a fast, mutual, positive feedback of the controlling mechanisms within the time frame of a single conflict. Such a mutual facilitation may contribute to the precipitation and escalation of violent behavior under stressful conditions. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

从系统总体看现代引信爆炸元件的设计问题

从引信系统总体的角度研究了爆炸元件的总体结构设计，分析了影响爆炸元件针刺感度、威力、作用时间的因素。提出小型针刺起爆元件应采用美国M55雷管结构；在保证安全的情况下，针刺感度宜高，应选用太安作雷管猛炸药装药；考虑引信隔爆要求时，应选用无气体延期药。同时提出减少性能散布应是引信爆炸元件的发展方向。     

高酸原油脱酸工艺技术研究

介绍了一种原油脱酸工艺方法。研究了温度、时间对高酸原油脱酸的影响,脱酸温度大于 260℃,脱酸反应较快。分析了高酸原油脱酸前后馏分酸值的变化,脱酸反应对130℃以上各馏分酸值降低都较多,180℃以上馏分脱酸率在80％以上。     

串行及并行A/D转换器在高速数据采集中的采样差别性分析

串行和并行接口模式是A/D转换器诸多分类中的一种,但却是应用中器件选择的一个重要指标.在同样的转换分辨率及转换速度的前提下,不同的接口方式不但影响了电路结构,更重要的是将在高速数据采集的过程中对采样周期产生较大影响.本文通过12位串行ADC ADS7822和并行ADC ADS774与AT89C51的接口电路,给出二者采样时间的差异性.     

快速纳秒响应二代近贴聚焦像增强器的批量生产

叙述了二代近贴聚焦像增强器批量生产所用真空设备性能及特点，同时给出了管子工艺考核结果及管子纳秒时间响应特性。工艺考核结果表明，制管工艺可靠、性能稳定，管子批量生产合格率大于70％。     

无线网络融合的安全技术研究

融合多种网络可满足用户长日寸间连接和尽可能获得较高数据传输速率的需要，但融合后的网络也将各种网络的安全缺陷带进融合网络中。这不但给融合网络的运行带进各种原有的安全问题，而且增加了一些新的安全问题。对此，文章提出了基于恢复的多重防护解决方案，并使用公钥加密算法鉴权。使用私钥对通信数据进行加密。该方案可以为系统提供可靠的安全性，并实现用户对服务的不可抵赖性。该方案还处于研究起步阶段，下一步还需要明确各层的正确行为，以及出现多个恶意节点对某个合法节点诬陷时所应采取的行动。     

地震数据采集系统延迟时间研究与分析

文章分析了影响地震采集系统延迟时间的因素,并根据系统延迟的理论对产生的原因进行了论证.同时对实际生产中的测试方法进行了阐述研究和分析,提出了新的测试方法,并结合实际生产提出了合理性建议.     

中原油田岩石可钻性与声波时差关系研究

选取中原油田的大量岩心，采用常规岩石力学测试方法测定了岩石的可钻性、声波测试方法测定了岩石和岩屑声波时差，通过对测得的岩石可钻性级值和声波时差进行回归拟合，得出了中原油田岩石可钻性与声波时差的关系式。现场应用表明，该关系式较好地反映了中原油田地层岩石可钻性与声波时差的关系，可以在优选钻头时作为参考或直接应用。     

CSTN-LCD用铬版清洗效果的改善

利用铬版清洗机对CSTN-LCD用铬版进行清洗处理,分析了清洗过程中出现的铬层脱落现象,铬层脱落与轴向喷射压力和水平切力密切相关,通过调整转速和喷射压力探索了安全使用条件:在转速不超过1000r/min,喷射压力低于0.5×105Pa的情况下使用铬版清洗机进行清洗是相对安全的。同时采用预清洗处理的方法满足清洁要求,使换线时间由平均3h缩短到平均1h以内,年产能提高270000片。     

The Precedence Effect in Three Species of Birds (Melopsittacus undulatus, Serinus canaria, and Taeniopygia guttata).

The perceived locations of paired auditory images, simulating direct sounds and their echoes, have been recently studied in budgerigars (Melopsittacus undulatus; M. L. Dent & R. J. Dooling, 2003a, 2003b). In this article, the authors extend those experiments to include measurements of the precedence effect using a discrimination paradigm in two additional bird species: canaries (Serinus canaria) and zebra finches (Taeniopygia guttata). Although time courses of summing localization, localization dominance, and echo thresholds were similar across all species, budgerigars had slightly higher overall levels of discrimination. The results from these experiments add further support that the precedence effect in birds is similar to that found in other animals and that the ability to suppress echoes that might degrade localization and auditory object perception may be a general property of the vertebrate auditory system. (PsycINFO Database Record (c) 2010 APA, all rights reserved)