蛇形机器人研究现况与进展

仿生技术与机器人技术的结合，使机器人从结构设计到运动模式的选择都有了 新的进展，这大大扩大了机器人的应用领域．本文阐述了仿蛇形机器人的应用背景和研究现 状，并展望了其未来的发展．     

解读中国“蛇”文化的祥瑞内涵

通过分析中国文献资料时蛇的记载、中国民风民俗中的蛇崇拜和禁忌文化等内容,指出中国蛇文化祥瑞的观念始于先民们时蛇的恐惧和崇拜,从最初的蛇神、始祖、生殖崇拜的神化和尊贵,逐步发展成为蛇变龙,真命天子的身份、权势、地位和吉祥的象征.它在民间民俗中广为流传,展现在各种民间民俗服饰、建筑、剪纸、绘画等艺术中.最后得出中国吉祥"蛇"文化的内涵在于它是民族宗教图腾崇拜、生殖崇拜、神圣灵睿以及吉祥、财富的符号象征.     

蛇油纳米乳的制备及稳定性评价

通过水相滴定法制备蛇油纳米乳,研究了混合油相、表面活性剂、助表面活性剂对蛇油纳米乳制备的影响,并利用伪三元相图法确定最佳蛇油纳米乳配方。结果表明：混合油相选择蛇油和肉豆蔻酸异丙酯（IPM）,表面活性剂选择Span80和Tween80二者质量比27∶ 73,助表面活性剂选择PEG400;最佳蛇油纳米乳配方为蛇油1.6 g、IPM 2.4 g、Span80 1.08 g、Tween80 2.92 g、PEG400 4.0 g、水8.0 g。所制得的蛇油纳米乳为O/W型,平均粒径为63.01 nm,PDI为0.226,Zeta电位为-19 mV,液滴外观为圆形,粒径均匀且状态良好;离心后清澈透明,不分层;不耐高温,需要在25 ℃以下贮存;冷冻后,可以在室温下恢复到初始状态;氧化稳定性较蛇油提高     

生态净养和传统养殖乌鳢的营养品质研究

乌鳢是一种营养价值较高的淡水鱼。在传统商品鱼养殖后期采用“生态净养”技术,降低产品脂肪含量,去除“土腥味”、提高肉质紧实度,使商品乌鳢品质提升。结果表明：净化组肥满度(p<0.05)和水分、粗脂肪(p<0.01)均高于池塘组。均检测出17种氨基酸,必需氨基酸、鲜味氨基酸含量普遍高于传统池塘。穿刺模式下硬度、弹性、破裂强度均高于池塘组,差异极显著(p<0.01)；触碰模式中净化组硬度、咀嚼性、回复性高于池塘组差异显著(p<0.05),净化组挥发性气味物质与五点快感评价法总体高于传统池塘。Fe、Cu、Zn、p等矿物元素均高于池塘组。综上,生态净养养殖乌鳢品质特性更佳,更符合消费者的需求,有良好市场前景。     

高强高韧铝合金厚板的蛇形轧制技术

介绍了蛇形轧制技术的原理,比较蛇形轧制与同步轧制的轧板咬入条件,采用有限元数值模拟方法研究了单道次蛇形轧制错位量对轧板弯曲的影响,并对比了多道次同步轧制和蛇形轧制在厚板轧制中轧板的等效应变。结果表明：蛇形轧制比同步轧制更加容易使得轧板咬入轧机;蛇形轧制中适量的轧辊错位可以有效地减小由于上、下轧辊异速所产生的轧板弯曲;蛇形轧制的轧板在厚度方向上的等效应变均高于同步轧制,轧板中部最小的等效应变比同步轧制高16.0%。     

Selective Attention to Angry Faces in Clinical Social Phobia.

This study investigated the time course of attentional responses to emotional facial expressions in a clinical sample with social phobia. With a visual probe task, photographs of angry, happy, and neutral faces were presented at 2 exposure durations: 500 and 1,250 ms. At 500 ms, the social phobia group showed enhanced vigilance for angry faces, relative to happy and neutral faces, in comparison with normal controls. In the 1,250-ms condition, there were no significant attentional biases in the social phobia group. Results are consistent with a bias in initial orienting to threat cues in social anxiety. Findings are discussed in relation to recent cognitive models of anxiety disorders. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

一种改进snake模型的中医舌体分割方法

在实现中医舌诊信息化的过程中,舌体轮廓的正确分割极其重要。本文从舌体上方一层特殊的水膜出发,通过色彩空间模型的转换,利用HSV空间模型预处理原始的舌体图像,然后根据得到的舌体大致的边缘轮廓线,应用改进的snake最小能量函数进行边缘收敛,从而得到了舌体提取的理想效果。实验证明,改进的snake模型方法具有鲁棒性,适用于舌体图像的分割。     

Factor structure and psychometric properties of the Injection Phobia Scale–Anxiety.

The present investigation examined the factor structure and psychometric properties of the Injection Phobia Scale–Anxiety (IPS-Anx). Principal components analysis of IPS-Anx items in Study 1 (n = 498) revealed a 2-factor structure consisting of Distal Fear and Contact Fear. However, CFA results in Study 2 (n = 567) suggest that a 1-factor structure may be more parsimonious. IPS-Anx scores demonstrated excellent reliability including test–retest over a 12-week period in Study 3 (n = 195). Supportive evidence for convergent and divergent validity of IPS-Anx scores was also found in Study 4 (n = 319), with strong associations with disgust propensity and sensitivity and weak associations with positive affect. Further evidence of validity was found in Study 5 (n = 1,674) because IPS-Anx scores discriminated those who have experienced fainting symptoms or avoided medical procedures from those without a history of such symptoms. In Study 6, data from Studies 2 through 5 were pooled, and the findings of Study 2 were replicated. The 1-factor model also fit the data well for men and women in Study 6. Lastly, IPS-Anx scores differentiated those with blood-injection-injury phobia (n = 39) from those without this phobia (n = 43) in Study 7. These findings suggest that the IPS-Anx has excellent psychometric properties, making it suitable for use in programmatic research on injection phobia. However, future research examining the validity of a short form of the scale with only the Contact Fear items may further improve the efficiency and utility of the IPS-Anx. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

基于MR-MS的snake模型及其应用

由Kass等人1987年提出的snake模型在计算机视觉领域引起了研究人员的广泛关注,并且被越来越多的应用于计算机视觉的许多实际问题 本文针对其缺陷提出了基于多分辨率和多尺度(简称MR MS)的snake型,并将其应用于医学的图像处理,实验结果证明了新模型的有效性