Flower solid modeling based on sketches

In this paper we propose a method to model flowers of solid shape. Based on （Ijiri et aL, 2005）＇s method, we separate individual flower modeling and inflorescence modeling procedures into structure and geometry modeling. We incorporate interactive editing gestures to allow the user to edit structure parameters freely onto structure diagram. Furthermore, we use free-hand sketching techniques to allow users to create and edit 3D geometrical elements freely and easily. The final step is to automatically merge all independent 3D geometrical elements into a single waterproof mesh. Our experiments show that this solid modeling approach is promising. Using our approach, novice users can create vivid flower models easily and freely. The generated flower model is waterproof. It can have applications in visualization, animation, gaming, and toys and decorations if printed out on 3D rapid prototyping devices.     

A level set based segmentation approach for point-sampled surfaces

Segmenting a complex 3D surface model into some visually meaningful sub-parts is one of the fundamental problems in digital geometry processing. In this paper, a novel segmentation approach of point-sampled surfaces is proposed, which is based on the level set evolution scheme. To segment the model so as to align the patch boundaries with high curvature zones, the driven speed function for the zero level set inside narrow band is defined by the extended curvature field, which approaches zero speed as the propagating front approaches high curvature zone. The effectiveness of the proposed approach is demonstrated by our ex- perimental results. Furthermore, two applications of model segmentation are illustrated, such as piecewise parameterization and local editing for point-sampled geometry.     

Establishing research universities in Ukrainian higher education: the incomplete journey of a structural reform

The idea of the research university as a key institution for social and economic development in knowledge-intensive societies has been adopted by the Ukrainian government after the fall of the communist regime. Establishing research universities is a long journey during which many things might happen. To understand this journey better in the case of Ukrainian research universities, we applied an analytical framework derived from the concept of travel and translation of ideas. This concept analyses reform through three types of editing rules: the rules of context, logic and formulation. These editing rules have guided our analysis of data gathered from policy documents complemented by face-to-face interviews. We conclude that the idea as introduced came to little, as the turbulent political context precluded long-term planning and universities were faced with conflicting policies.     

Watermarking on 3D mesh based on spherical wavelet transform

INTRODUCTIONTherapidgrowthofdigitalmediaoverInternetprovideseverybodywiththefacilityofeasyaccess,copy,editanddistributionofdigitalcontentssuchaselectronicdocuments,images,soundsandvideos.Thereisurgentdemandfortechniquestoprotectthecopyrightoftheoriginaldigitaldataandtopreventunauthorizedduplicationortampering.Digitalwatermarkingordatahidingisonesolutionforthecopyrightprotectionofdigitaldata.Digitalwatermarkingisaprocessbywhichauser-specifiedsignal(watermark)ishiddenorembeddedintoanothersi…     

Watermarking on 3D mesh based on spherical wavelet transform

In this paper we propose a robust watermarking algorithm for 3D mesh. The algorithm is based on spherical wavelet transform. Our basic idea is to decompose the original mesh into a series of details at different scales by using spherical wavelet transform; the watermark is then embedded into the different levels of details. The embedding process includes: global sphere parameterization, spherical uniform sampling, spherical wavelet forward transform, embedding watermark, spherical wavelet inverse transform, and at last resampling the mesh watermarked to recover the topological connectivity of the original model. Experiments showed that our algorithm can improve the capacity of the watermark and the robustness of watermarking against attacks.     

Developing political astuteness: a leadership coaching journey

This paper argues that political astuteness, or the ability to use political skills in the service of ethical judgements, is a complex yet essential element of school leadership development that is underemphasised in the leadership coaching literature. It also suggests that exploring the responsible use of power requires a narrative approach which, in turn, demands certain conditions of the coaching relationship. Drawing from the author's research and teaching, the paper makes an original contribution to the field by introducing a conceptual framework for ‘politically astute’ leadership coaching, using a narrative approach. In keeping with this approach, the framework is presented through the representative construction of a professional development story. The implications of this story for school leadership coaching are then discussed and some provisional conclusions drawn.     

创新用户体验的高校学报数字化出版策略

高校学报采用数字化出版策略首先要培养出版者的数字化编辑理念,并适时把握转型时机,其关键在于创新用户体验,如在用户友好界面的排版方式、附加功能、在线社区、数据分析等多方面增加学报的互动体验途径,实现高校学报面向学术、服务用户的宗旨。     

典型测试技术实验的虚拟课堂实验设计

探讨了虚拟仪器技术在"测试技术"课程相关知识点中的应用,在理论教学和实践教学的基础上,建立了与理论教学相辅相成的仿真实验目标,设计了课程中信号及其频谱、电桥的仿真实验方案及仿真实验程序,实现了不同信号的频谱分析、不同组桥类型的电桥输出特性等仿真实验.结果表明:电桥特性的仿真程序可以分别进行单臂电桥、半桥、全桥的仿真实验...     

心音信号包络提取和识别方法的比较分析研究

对心音信号进行进一步的自动识别和分析之前,首先对其进行包络提取是目前比较常用且很有效的信号处理方法,采用合理的包络提取方法得到的信号包络一般都包含有原信号的有效时域信息。对于心音信号,采用包络信号进行心音各个成分的识别,进而提取有用的生理参数,不但不会影响检测精确度,而且会减少计算量,简化识别流程,提高识别效率。在分析比较几种常用的心音包络提取算法的基础上,应用基于短时平均能量的方法提取心音信号包络,获得了比较好的效果。     

Students’ understanding of the structure of deductive proof

While proof is central to mathematics, difficulties in the teaching and learning of proof are well-recognised internationally. Within the research literature, a number of theoretical frameworks relating to the teaching of different aspects of proof and proving are evident. In our work, we are focusing on secondary school students learning the structure of deductive proofs and, in this paper, we propose a theoretical framework based on this aspect of proof education. In our framework, we capture students’ understanding of the structure of deductive proofs in terms of three levels of increasing sophistication: Pre-structural, Partial-structural, and Holistic-structural, with the Partial-structural level further divided into two sub-levels: Elemental and Relational. In this paper, we apply the framework to data from our classroom research in which secondary school students (aged 14) tackled a series of lessons that provided an introduction to proof problems involving congruent triangles. Using data from the transcribed lessons, we focus in particular on students who displayed the tendency to accept a proof that contained logical circularity. From the perspective of our framework, we illustrate what we argue are two independent aspects of Relational understanding of the Partial-structural level, those of universal instantiation and hypothetical syllogism, and contend that accepting logical circularity can be an indicator of lack of understanding of syllogism. These findings can inform how teaching approaches might be improved so that students develop a more secure understanding of deductive proofs and proving in geometry.     

Wavelet-based deconvolution of ultrasonic signals in nondestructive evaluation

INTRODUCTION Deconvolution of ultrasonic signals is defined as the solution of the inverse problem of convolving an input signal, known as the system function h(n), with a medium reflectivity function x(n) and can be rep- resented by y(n)=h(n)*x(n) η(n), (1) where y(n) is the measured signal, * denotes the convolution operation and η(n) is the additive noise. Recovering x(n) from the observation y(n) leads to improving the appearance and the axial resolution of the RF-signals by removin…     

元话语的认知语用阐释及翻译

元话语作为组织语篇、表达作者态度的手段体现了元话语概念的认知和语用特征。文章通过实例从认知和语用的视角揭示了元话语对语篇意义表达产生的制约和影响。由于不同语言在表意方式上的差异,翻译中对元话语的处理应采用动态灵活的策略,实现原文意义的顺利转换。     

成长,从迷惘到坚定——对《老人》的功能文体学分析

《老人》是美国女作家凯瑟琳·安·波特"米兰达"系列小说中的一部。故事按照时间顺序分为三个部分,描述了女主人公米兰达在各个年龄阶段的不同心理状态。本文选取在这三个部分中米兰达所参与的及物性过程作为分析材料,并通过对语料中"前景化"的及物性过程的分析,揭示了米兰达从无知,迷惘到坚定的成长过程及其自我意识的觉醒,从功能文体学的角度为"米兰达"这一文学角色的解读提供了一个全新的视角。     

'The Rush of Images': a Research Report into Digital Editing and the Moving Image

This article is an interim report on a small action research project being carried out by a group of teachers into digital editing. The authors focus on a critical evaluation of a ‘conceptual framework’ for editing digitised moving images, devised as part of the research project. The body of the article is concerned with observations of students carrying out editing, with the framework being used to structure the observations.     

Smooth feature line detection for meshes

INTRODUCTION With the rapid development of graphical hard-ware, triangular mesh has become one of the most popular representations for 3D objects in computer graphics and virtual reality. Many techniques have been developed such as mesh simplification, mesh editing, mesh signal processing and parameterization, etc., to process the triangular mesh. Feature detection is a key technique in mesh processing. In general, features include ridges, ra-vines, corners and boundaries, etc., which ca…     

顶点覆盖问题的贪心算法在网格简化中的应用研究

针对三角网格简化,设计了求解顶点覆盖问题的贪心算法,通过贪心选择最小的顶点集去＂覆盖＂边集,同时保留被简化网格的特征信息,自动实现最大程度简化。给出的实例也表明简化后的网格质量良好,算法既降低了时间复杂度又保持了原形状的特征信息。     

采用小波变换与RBF神经网络优化的电机故障模糊诊断系统

针对特征信号淹没于噪声信号的情况,采用Morlet小波分析实现了对原始电流特征信号的降噪.同时,采用基于RBF神经网络的最优化插值与具有频谱细化特性的CZT分析,提升了频谱分辨率,充分展现了发生故障时电流特征信号的频谱细节,为电机故障诊断系统提供了可靠的诊断依据.建立了基于改进型BP神经网络的电机故障模糊诊断系统,抽象出了偏心故障的诊断规则.实测结果表明,该系统能够可靠地诊断电机的偏心故障.     

隶事的变体与范式的立则——张鷟《龙筋凤髓判》的性质及创作分析

张鷟《龙筋凤髓判》一书的性质一直存在分歧,对其编辑体例进行梳理,认为其体例特点“胪比官曹,条分件系”和“类事属词”,确实形同类书。但由于张骛的本意是“取备程式之用”,具有一定的创作范式的目的,这又决定了他在判理和文学手法上发挥才智,使之成为具有创作个性的集部作品。     

知识经济时代高校学报的发展趋势

对学报编辑的传统办刊模式和对用现代信息技术办刊的初步尝试的对比分析，说明在知识经济时代，高校学报的发展趋势是用现代信息技术转变学报传统的办刊模式，这是时代的要求、历史的必然。同时进一步提出，编辑必须掌握现代信息技术的紧迫性和艰巨性。