An edge-preserving algorithm of joint image restoration and volume reconstruction for rotation-scanning 4D echocardiographic images

INTRODUCTION 3D echocardiography has been widely used in diagnostic cardiology because it can visualize the complex structure of heart more accurately than pre-vious used 2D diagnosis method. Currently, there are two major image acquisition methods of 3D echo-cardiography, i.e., random data acquisition and se-quential data acquisition (Roelandt, 2000). The for-mer uses a spatial locator to measure the position and orientation of the ultrasound probe, allowing unre-stricted (free-hand) s…     

Time series of EIT measurements and images during lung ventilation based on principal component analysis

The aim of this paper is to propose a useful method for exploring regional ventilation and perfusion in the chest and also separation of pulmonary and cardiac changes.The approach is based on estimating both electrical impedance tomography(EIT) measurements and reconstructed images by means of principal component analysis(PCA).In the experiments in vivo,43 cycles of heart-beat rhythm could be detected by PCA when the volunteer held breath;9 breathing cycles and 50 heart-beat cycles could be detected by PCA ...     

用inRm3D实现数学分析课程的数形结合教学

介绍了数学分析课程中的曲线积分、重积分、曲面积分中的三维曲面的inRm3D画法,体现了inRm3D软件使用的简单性、便捷性,说明了数学分析课程数形结合教学的可行性.     

Maximizing modern distribution of complex anatomical spatial information: 3D reconstruction and rapid prototype production of anatomical corrosion casts of human specimens

Anatomical corrosion casts of human specimens are useful teaching aids. However, their use is limited due to ethical dilemmas associated with their production, their lack of perfect reproducibility, and their consumption of original specimens in the process of casting. In this study, new approaches with modern distribution of complex anatomical spatial information were explored to overcome these limitations through the digitalization of anatomical casts of human specimens through three‐dimensional (3D) reconstruction, rapid prototype production, and Web‐based 3D atlas construction. The corrosion cast of a lung, along with its associated arteries, veins, trachea, and bronchial tree was CT‐scanned, and the data was then processed by Mimics software. Data from the lung casts were then reconstructed into 3D models using a hybrid method, utilizing both “image threshold” and “region growing.” The fine structures of the bronchial tree, arterial, and venous network of the lung were clearly displayed and demonstrated their distinct relationships. The multiple divisions of bronchi and bronchopulmonary segments were identified. The 3D models were then uploaded into a rapid prototype 3D printer to physically duplicate the cast. The physically duplicated model of the lung was rescanned by CT and reconstructed to detect its production accuracy. Gross observation and accuracy detection were used to evaluate the duplication and few differences were found. Finally, Virtual Reality Modeling Language (VRML) was used to edit the 3D casting models to construct a Web‐based 3D atlas accessible through Internet Explorer with 3D display and annotation functions. Anat Sci Educ. © 2012 American Association of Anatomists.     

A rational reconstruction of the kinetic molecular theory of gases based on history and philosophy of science and its implications for chemistry textbooks

Research in science education has recognized the importance of history and philosophy of science. Given this perspective, the study was designed to develop a framework for examining the way in which chemistry textbooks describe the kinetic theory and related issues. The framework was developed by a rational reconstruction of the kinetic molecular theory of gases based primarily on the interpretations of Maxwell and Boltzmann, by historians and philosophers of science. Another aspect of the framework was based on an analysis of freshman chemistry students' performance on gas problems that required the use of algorithms or conceptual understanding. Subsequently, 22 textbooks were evaluated using a framework consisting of six criteria. Results obtained showed that most textbooks lacked a history and philosophy of science framework and did not deal adequately with the following aspects: (1) Postulates of the kinetic theory were speculative and played the role of simplifying assumptions, considered to be the rule in science rather than being the exceptions; (2) Based on these simplifying assumptions, the theorists built a series of tentative models that progressively incorporated the behavior of real gases; (3) Similar to other research programs in the history of science, Maxwell's was based on inconsistent foundations; (4) Development of the kinetic theory had to compete with chemical thermodynamics, a rival research program; (5) Maxwell and Boltzmann facilitated our understanding of gas behavior beyond the observable hydrodynamical laws, by explaining the internal properties (e.g., molecular collisions).     

A training technique for improving the parent-child interaction skills of an abusive-neglectful mother

Several recent investigations have shown that abusive and neglectful parents exhibit deficits in skills for interacting with their children. In the current study, an inattentive and neglectful parent was taught to provide positive verbal and physical attention towards her 4-year-old child. Training was accomplished using a “bug-in-the-ear” microphone device while the parent interacted with her child in a clinic playroom. After use of the device was discontinued, the parent continued to use the newly trained skills at rates higher than during baseline. Four month follow-up and at home observations were suggestive of skill maintenance. Training of this kind may prove useful for parents who lack skills for effective interaction with their children.     

Hierarchical models for failure analysis of plates bent by distributed and localized transverse loadings

The failure analysis of simply supported, isotropic, square plates is addressed. Attention focuses on minimum failure load amplitudes and failure locations, von Mises＇ equivalent stress along the plate thickness is also addressed. Several distributed and localized loading conditions are considered. Loads act on the top of the plate. Bi-sinusoidal and uniform loads are taken into account for distributed loadings, while stepwise constant centric and off-centric loadings are addressed in the case of localized loadings. Analysis is performed considering plates whose length-to-thickness ratio a/h can be as high as 100 （thin plates） and as low as 2 （very thick plates）. Results are obtained via several 2D plate models. Classical theories （CTs） and higher order models are applied. Those theories are based on polynomial approximation of the displacement field. Among the higher order theories （HOTs） HOTsa models account for the transverse shear deformations, while HOTs models account for both transverse shear and transverse normal deformations. LHOTs represent a local application of the higher order theories. A layerwise approach is thus assumed： by means of mathematical interfaces, the plate is considered to be made of several fictitious layers. The exact 3D solution is presented in order to determine the accuracy of the results obtained via the 2D models. In this way a hierarchy among the 2D theories is established. CTs provide highly accurate results for a/h greater than 10 in the case of distributed loadings and greater than 20 for localized loadings. Results obtained via HOTs are highly accurate in the case of very thick plates for bi-sinusoidal and centric loadings. In the case of uniform and off-centric loadings a high gradient is present in the neighborhood of the plate top. In those cases, LHOTs yield results that match the exact solution.     

楚雄师专学生毕业论文(设计)调查分析及建议

通过对楚雄师专教师、学生对怎样做好毕业论文（设计）工作等有关方面的问卷调查,使用χ2检验法分析并得出结果,提出几点建议,以促使学校切实有效地开展毕业论文（设计）的工作,使毕业论文（设计）工作迈向更高的台阶。     

A critical analysis and evaluation of Web-based environments for program development

This paper provides a classification, review, and critical analysis of current Web-based interactive programming environments and tools that facilitate learning programming languages and concepts. The focal point of the paper is based on (1) categorizing available programming systems and tools into classes according to their pedagogical approaches; (2) reviewing individual systems; and (3) critically analyzing them according to established standards for instructional design. The paper is intended to provide those seeking to use these resources with a comprehensive survey of the available systems, their succinct evaluation, and their effectiveness.     

我国与发达国家群众体育活动内容、强度和频率的文化学分析

我国与发达国家体育活动的内容、强度及频率有着较大的差异，发达国家的群众体育活动多为休闲活动，而我国居民则以传统的养生为核心。西方发达国家的参与率高于我国。造成这种现象的主要原因，主要是经济与文化生活水平的差距。     

世纪初贵州省图书馆学情报学研究的文献计量分析

对2000～2006年贵州省研究人员发表的图书馆学情报学期刊论文,从数量分布、期刊情报源分布、内容主题分布、被《人大报刊复印资料:图书馆学、信息科学、资料工作》转载情况、核心期刊发文情况、被引期刊论文(被引频数分布、高被引论文、高频被引作者)等方面进行全面的统计分析,揭示和勾画了世纪初我省图书馆学情报学研究的基本状况.     

替天行道行何道--关于《水浒传》中道的辨析

《水浒传》中的“替天行道”打的虽是“道”的旗帜,行的却是儒家之道。尽管《水浒传》与道教的关系很密切,“替天行道”也很容易和道家、道教之道搅和在一起,但宋江实际上行的自始自终都是儒家的“道”。     

师范大学生恋爱现状调查统计分析及建议

大学一年级是师范大学生恋爱的初始高峰期,随着年级的升高递减。思想品质、性格、才能是他们选择恋人的首要标准,而对待恋爱阳性作用的认同,大幅度提高。这反映了师范大学生驾驭自我,驾驭情感,承受挫折的能力在增强,同时也暴露出某些玩世不恭的情绪。对于师范大学生的恋爱问题,亟须广大教育工作的宏观指导与微观的具体帮助。     

某空腹式双曲拱桥承载力现场测试与分析

为检验在役双曲拱桥的承载能力与动力特性,对某净跨为36 m空腹式双曲拱桥进行了静载试验、动载试验及空间有限元分析。测试结构的静态应变、动态应变、挠度、自振频率、振型及加速度等结构反应,计算得出冲击系数。将实测结果与有限元结果进行对比分析,结果表明:应变校验系数为0.5~0.9,结构具有较好承载力。实测的各阶频率及相应振型与有限元计算结果比较吻合,桥梁整体竖向刚度较好。     

道桥专业高职人才三维能力体系构建

道桥专业人才的能力可分解为专业能力、社会能力和方法能力,即“三维能力”体系,由以上三方面能力的总框架下的若干子能力构成。同时,这一能力体系中,依据能力的重要性,可进行纵向和横向的层次定位,从而达到对道桥专,Jk高职人才的培养目标进行任务分解的目的。     

适应性·成长性·职业性——高职高专“思想道德修养与法律基础”课教学设计新维度

根据新形势下高职高专院校特点,为加强＂思想道德修养与法律基础＂课的针对性、吸引力、感染力和实效性,课程设计确立了以＂适应性、成长性、职业性＂为核心原则,在教学内容、教学方法、教学手段和考试评价方式等方面不断追求改革创新。     

A genre-based analysis of English research article abstracts and the linguistic feature of personal pronouns for financial economics

This paper presents an empirical study of move structures and personal pronouns of fifty English RA （research article） abstracts based on the model of Bhatia （1990）. It revealed that three other move patterns were ascertained besides ten out of the analyzed abstracts following his move order. The analysis of personal pronouns showed that first-person plural pronouns are used far more frequently than other types of personal pronouns and no presence of the second-person and the third-person pronouns were detected in the abstracts. A further analysis suggests that first-person plural pronouns can perform multiple functions in abstracts. ESP （English as Special Purpose） teachers may benefit from the study to guide students to explore the discourse conventions of the RA abstracts in their own texts.     

大学聘任制改革及问题分析与探讨--基于A大学的改革方案

文章以某大学的教师聘任制改革方案为研究对象。从教师的分类、同行评议制度、教师的流动与聘任等方面进行了文本分析与探讨。通过分析得出,大学聘任制改革需要有法可依、需要遵循学术自身发展的规律并处理好学术权力与行政权力的关系等启示。     

A novel framework for identifying the interactions between biophysical and social components of an agricultural system: a guide for improving wheat production in Haryana,NW India

Purpose: The purpose of this study is to develop a conceptual framework with related analysis methodologies that identifies the influence of social environment on an established cropping system.

Design/methodology/approach: A stratified survey including 103 villages and 823 farmers was conducted in all districts of Haryana (India). Firstly, technical efficiency (TE) was modeled using biophysical data including grain yield, seeding rate, wheat varieties, tillage, sowing date, seed source, harvesting method and the application of fertilizer, herbicide and irrigation. The relationship between TE and social community factors such as farm size, farmer age, level of education and agricultural support programs was analyzed by regression tree.

Findings: TE was lower with the farmers who only have education to a primary standard. Farmers with high TE scores were mostly between 35 and 40 years of age, and a higher TE association was common for farmers who use technical publications. Social individual factors such as farmers’ views on the future of farming were also analyzed across different TE levels.

Practical implications: Farmers with lower TE are an obvious target for production improvement, particularly given the understanding that the overall production yield gap is small in Haryana.

Theoretical implications: Our conceptual framework shows a quantitative way to establish the socio-ecological linkage, and to identify the opportunities for changes in management with extension services leading to productivity improvement.

Originality/value: This paper provides a novel framework with detailed methodology to effectively identify the socio-economic factors that limit the biophysical production in an agricultural system.     

高校体育课程"发展性"学习评价体系的实验研究

采用文献资料法、专家访谈法、问卷调查法、AHP层次分析法等研究方法,依据《全国普通高等学校体育与健康课程纲要》精神,遵循"以生为本,全面考察,促进发展"的原则,初步确立了体育课程学习评价体系,并通过实验法进行验证和完善。