A color based face detection system using multiple templates

A color based system using multiple templates was developed and implemented for detecting human faces in color images. The algorithm consists of three image processing steps. The first step is human skin color statistics. Then it separates skin regions from non-skin regions. After that, it locates the frontal human face(s) within the skin regions. In the first step, 250 skin samples from persons of different ethnicities are used to determine the color distribution of human skin in chromatic color space in order to get a chroma chart showing likelihoods of skin colors. This chroma chart is used to generate, from the original color image, a gray scale image whose gray value at a pixel shows its likelihood of representing the skin. The algorithm uses an adaptive thresholding process to achieve the optimal threshold value for dividing the gray scale image into separate skin regions from non skin regions. Finally, multiple face templates matching is used to determine if a given skin region represents a frontal human face or not. Test of the system with more than 400 color images showed that the resulting detection rate was 83%, which is better than most color-based face detection systems. The average speed for face detection is 0.8 second/image (400×300 pixels) on a Pentium 3 (800 MHz) PC. Project (No. 60203013) supported by National Natural Science Foundation of China     

A color basedface detection system using multiple templates

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Counsellors perceptions of the phenomenon of concentration difficulties

Pupils’ lack of concentration is a concern in everyday classrooms in Norway as in many other countries. Whereas research has defined different behaviour issues in classroom contexts, there has been less focus on how the counsellors, working at the Educational and Psychological Counselling Service (EPCS), describe different behaviour issues. This article is based on a study that aims to develop a deeper understanding of how the counsellors perceive the term ‘concentration difficulties’. Even though the term is widely used in templates and in national strategic documents to describe pupils’ disruptive behaviour, few other studies emphasise this perspective. The study has a phenomenological-hermeneutic inspired approach and is based on individual in-depth interviews with counsellors working at the EPCS. The key findings suggest that the counsellors understanding of the term are influenced by their personal perceptions of the term, their education and the way they facilitate adapted learning.     

胶合板模板设计存在问题分析与对策

以国家标准和规范为依据，分析了目前胶合板模板设计存在的问题，并根据工程结构构件的特点给出了各种柱、梁、板、墙胶合板模板的合理构造设计示意图，结合工程实例分析了胶合板模板的计算方法。     

Learning to teach: Effects of classroom observation,assignment of appropriate lesson preparation templates and stage focused feedback

This article focuses on improving the instructional quality of student teachers in elementary education. We developed a coaching approach involving classroom observation and appropriate lesson preparation and feedback templates. Using an untreated control group design with pre-test and posttest (n = 198), we answered the question ‘whether student teachers who learned to teach with the new coaching approach achieved a higher level of pedagogical and didactical teaching skills compared to student teachers who did not receive this approach’. The effect variable used was the observation instrument ICALT. We compared the average scores of the control group and the experimental group on the posttest (ANCOVA). The differences found on the posttest, after controlling for the confounding variables, were significant on all ICALT scales. These effect sizes are medium on the scales; ‘Safe climate’, and ‘Clear instruction’, and large on the scales; ‘Classroom management’, ‘Activating pupils’, ‘Adaptive teaching’, and ‘Teaching learning strategies’.     

Collective prompt tuning with relation inference for document-level relation extraction

Document-level relation extraction (RE) aims to extract the relation of entities that may be across sentences. Existing methods mainly rely on two types of techniques: Pre-trained language models (PLMs) and reasoning skills. Although various reasoning methods have been proposed, how to elicit learnt factual knowledge from PLMs for better reasoning ability has not yet been explored. In this paper, we propose a novel Collective Prompt Tuning with Relation Inference (CPT-RI) for Document-level RE, that improves upon existing models from two aspects. First, considering the long input and various templates, we adopt a collective prompt tuning method, which is an update-and-reuse strategy. A generic prompt is first encoded and then updated with exact entity pairs for relation-specific prompts. Second, we introduce a relation inference module to conduct global reasoning overall relation prompts via constrained semantic segmentation. Extensive experiments on two publicly available benchmark datasets demonstrate the effectiveness of our proposed CPT-RI as compared to the baseline model (ATLOP (Zhou et al., 2021)), which improve the 0.57% on the DocRED dataset, 2.20% on the CDR dataset, and 2.30 on the GDA dataset in the F1 score. In addition, further ablation studies also verify the effects of the collective prompt tuning and relation inference.     

以碳纳米管为模板制备氧化铜纳米棒

一维纳米材料具有独特的化学、力学和物理性质,已成为科学研究的热点。而氧化铜在工业上有着广泛的用途。本文报道了以碳纳米管为模板制备氧化铜纳米棒,用湿化学技术把硝酸铜填充在碳纳米管中,在750℃焙烧6小时,除去碳纳米管。通过透射电镜(TEM)观察和X射线粉末衍射(XRD)表征：所得氧化铜产品具有单斜晶形氧化铜纳米棒,其直径在20-90nm,长约500-1000nm,长径比约为30。     

如何提高大学专业英语教学效率——以模板教学法的实践为例

大学专业英语教学效率亟需得到提高。专业英语的特色在于根据学生需求、能力和专业特点制定教学目标,并设计教学方法。本文在提出强化专业英语在整个大学英语教学体系中的作用和地位的同时,分析总结了目前专业英语教学中存在的主要问题。为了贯彻专业英语的教学目标,具体设计了模板教学法,并给出实例对该方法的应用过程进行了说明。结果表明教学方法设计很好地体现了对教学目标和教学对象的理解,是提高教学效率直接而有效的手段。     

Early Evidence of Modular Templates Used to Draw Human Figures on Mural Paintings: The Etruscan Tomba degli Scudi in Tarquinia

ABSTRACT

During recent conservation work carried out on the Etruscan mural paintings in the Tomba degli Scudi, (Tarquinia, 4th C. BCE), the study of the execution techniques led to an amazing discovery: human figures were composed using templates of single body parts. In the Tomba degli Scudi, the perfect overlap of limbs, chests, and heads was confirmed after processing rectified photogrammetric images of the wall paintings with photo editing software. The study also highlighted that such templates were probably made of rigid material and each one had three different sizes, in order to represent the hierarchical organization of the painted characters. In the past, scholars have demonstrated that templates were used to realize a number of Etruscan wall paintings. However, they had reported that only whole figures were reproduced. The notion that such templates consisted of single anatomical parts purposely created to portray figures in different poses never occurs in their studies. In fact, the use of modular templates, also called patroni and antibola, is acknowledged only from the Middle Ages onwards both in western and eastern art. Earlier evidence had never been found. This article aims to predate the use of modular shapes by about ten centuries, thus changing our knowledge of technologies whose tradition spans from the Classical Antiquity to the Middle Ages. Consequently, a new approach to the study of transfer techniques of preparatory drawings in Etruscan wall paintings is established. Furthermore, this article shows that, as in the Middle Ages, the size of such templates was scaled up or down to create hierarchies among the painted characters.     

在视频对象平面生成中使用细胞神经网络进行初始对象的分割

1　Introduction　MPEG 4videocodingstandard providesobject basedfunctionalitiesbyintroducingtheconceptofvideoobject plane (VOP) .Withtheextractionofvideoobjectsandallocatingdifferentnumberofbitsordifferentframe ratesfordifferentobjects ,thestan dardcansupportobject basedscalabilitythatisusefulinmanypracticalapplications[1] .However,MPEG 4alwaysassumesthatthevideocontentstobecodedarewellrepresentedinvideoobjectswithoutmandatinganyspecifictechniques;sovideoobjectsegmentationbecomesanimportant…