环保式全自动烘手机电路设计

利用红外技术的接近开关、气敏检测技术的气敏检测开关、热敏技术的温控开关及电阻热效应和电晕放电技术发生空气负离子等原理设计出环保式全自动烘手机电路.并介绍了电路安装调试的步骤和方法.     

γ射线暴:从中子物质到夸克胶子等离子体的相变

指出快速旋转的新生中子星内部存在着从正常强子物质到夸克胶子等离子体的相变过程,而γ射线暴所释放的巨大能量可能正是这种相变过程的结果。在新诞生的中子星通过偶极电磁辐射和四极引力辐射损失能量而减速时,其中心密度增加,并可能达到QCD的相变密度(原子核密度的5～10倍)。这种相变所释放出的能量可以解释γ射线暴的强大能量暴发及其聚束效应。γ射线暴位置附近相当致密的气体环境和在其X射线余辉中金属发射线的观测是对这种观点的支持。我们还给出了一些预言。     

Allocation of fixed transmission cost based on power flow tracing algorithm

1 Introduction a In the electricity market, because the calculation of the traditional spot electricity price according to node transmission charging is based upon short-run marginal cost, it is impossible to recover the great one-off investment of the transmission network, and this results in the payment imbalance of the electric network. Therefore, such spot electricity price goes against and its modification is indispensable to the development of the power system, and it is necessary to mod…     

The translucent cadaver: An evaluation of the use of full body digital x-ray images and drawings in surface anatomy education

It has been noted by staff at the Faculty of Health Sciences, Stellenbosch University that medical students neglect the study of surface anatomy during dissection. This study reports on the novel use of Lodox® Statscan® images in anatomical education, particularly the teaching of surface anatomy. Full body digital X‐ray images (Lodox Statscan) of each cadaver (n = 40) were provided to second year medical students. During dissection students were asked to visualize landmarks, organs, and structures on the digital X‐ray and their cadaver, as well as palpate these landmarks and structures on themselves, their colleagues, and the cadaver. To stimulate student engagement with surface anatomy, dissection groups were required to draw both the normal and actual position of organs on a laminated image provided. The accuracy of the drawings was subsequently assessed and students were further assessed by means of practical identification tests. In addition, students were asked to complete an anonymous questionnaire. A response rate of 79% was obtained for the student questionnaire. From the questionnaire it was gathered that students found the digital X‐ray images beneficial for viewing most systems' organs, except for the pelvic organs. Although it appears that students still struggle with the study of surface anatomy, most students believed that the digital X‐rays were beneficial to their studies and supported their continued use in the future. Anat Sci Educ. © 2012 American Association of Anatomists.     

肾脏保存中亚细胞水平上Ca2+浓度的X射线微区分析

应用定量 X射线微区分析技术结合细胞化学技术 ,分析测定用单纯冷冻法保存离体猫肾脏过程中肾脏细胞的胞浆、线粒体、内质网、细胞核等细胞器内的 Ca2 浓度变化 ,并探索钙通道阻滞剂对这种变化的影响 .保存 36h及 72 h后 ,线粒体与胞浆中 Ca的峰背比极显著地提高 ,内质网、细胞核中 Ca颗粒减少 .添加 Verapamil后 ,保存过程中细胞器内 Ca2 无显著变化 .线粒体中的Ca峰背比与胞浆中的呈强的正相关 ,r=0 .990 .实验结果揭示 :保存过程中 ,Ca2 由 Ca库 (内质网等 )进入胞浆中 ,线粒体在胞浆 Ca2 浓度高时摄取 Ca2 ,而钙通道阻滞剂可抑制该过程     

高分辨率掌纹图像的分割

研究了高分辨率掌纹图像的分割方法问题,将均值、标准差作为标准,实现了由纹线组成的掌纹图像的前景分割。对于手指部分的干扰,将其分为孤立的手指部分和与手掌相连的手指部分分别进行处理,利用区域生长法提取最大连通域达到去除孤立手指部分的目的;利用轮廓跟踪法比较CD、PD距离,定位与手掌相连的手指部分的位置,从而实现将其去除的目标。实验结果表明,该方法很好地实现了高分辨率掌纹图像的分割,为后续的特征提取工作奠定了基础。     

由模拟实验的电力线认识电场的性质

文中通过一个模拟实验,对电力线的特性的实质进行了分析,可以加深学生对电场及其叠加原理的理解。     

Tracing worked examples: effects on learning in geometry

Previous research has verified the benefits obtained when learners trace out worked examples with the index finger. Our study conducted two experiments to explore the reasons for this phenomenon and its generalizability. Experiment 1 compared the learning effects among tracing, non-tracing, and cueing methods. The cueing method was included to isolate the variable of drawing attention. Students employing the tracing method obtained higher transfer test scores compared to those employing the cueing and non-tracing methods, rating the far transfer test as easier. The tracing effect was verified to have a greater impact on learning than solely focusing learners’ attention. Experiment 2 compared the learning effects among three methods – tracing with the index finger, tracing with a computer mouse, and observing others tracing. Students who merely observed tracing obtained lower far transfer scores than those who traced either with their finger or with the mouse, rating the tests as more difficult. There was no significant difference between the other two groups. Tracing promotes learning more than merely observing tracing. The learning benefits of tracing partly stem from the fact that it is action-based and can be generalized to mouse tracing.     

基于规则网格的等值线的生成研究

本文对规则格网等值线的生成算法做了些许探讨和研究,具体介绍了等值点的计算,等值线的追踪和绘制。     

客家酿豆腐探源

＂酿＂是我国一种传统烹饪方法,即将调好的肉馅置入另一种食物中一并烹调,＂酿豆腐＂的命名理据正源于此。酿豆腐是中原传统饮食习惯与迁徙地特殊生产生活方式相结合的典范食品。加强客家饮食文化研究,对促进当地经济文化建设、加强海内外客家人联系合作具有重要的现实意义。