Some Special Ruled Surfaces Generated by a Direction Curve according to the Darboux Frame and their Characterizations

In this work, we consider the Darboux frame T , V , U of a curve lying on an arbitrary regular surface and we construct ruled surfaces having a base curve which is a V -direction curve. Subsequently, a detailed study of these surfaces is made in the case where the directing vector of their generatrices is a vector of the Darboux frame, a Darboux vector field. Finally, we give some examples for special curves such as the asymptotic line, geodesic curve, and principal line, with illustrations of the different cases studied.

Palmprint Recognition Using Hessian Matrix and Two-Component Partition Method

Palmprint recognition has been comprehensively examined in the past couple of years and various undertakings are done to use it as a biometric methodology for various applications. The point of this study is to construct an effective palmprint recognition technique with low computational multifaceted nature and along these lines to expand the acknowledgment and precision. Since edges are free from distortion, they are very reliable and subsequently used for palm print recognition. The originality of the proposed technique depends on new area of interest (ROI) extraction took after by new principal line extraction and texture matching strategy. The new principal line extraction technique is created by using the Hessian matrix and Eigen value. The texture matching of the ROI is done using new 2-component partition method by segmenting the image into comparative and non-comparative edges. Examinations are finished on a database and exploratory results exhibit that the accuracy of the proposed method is comparable to past methods used for palmprint recognition.

Feature Extraction of Iris and Palmprint Biometric System using Dwt

Much work is done on Iris Recognition, since few years. Many cases discussed about performance in view of image capturing and recognition. Daugman work is the most important related to iris biometric in early research. It is fair to say, it is base model for iris biometric. Almost the available iris systems are based on this work. A palm print is image of the palm area of a hand. It is either an image taken online or offline. It is one of the most familiar and promising biometric model for personal identity verification. It is tough task to differentiate lines and wrinkles without explicit definition. depends on the thickness and position of some key points we can define principal lines. In our work, we are taken the principal line magnitude is less than or equal to 1. we cannot consider broken lines. If it is the case broken point is treat as last point

Exploration and Practice of Teaching Mode for Mechanism Professional Course Based on the Engineering Process

The article analyzes main characteristics of the mechanism specialized courses, and summarizes existing the main problems in the teaching process at present. Combining the personnel training target of the mechanical engineering, what leads based on basic theory and principal line is the main project is put forward to construct the new course teaching mode, to cultivate students' ability of engineering application analysis ability and the team cooperation, and have the clear and reasonable design idea in the curriculum.

Adaptable Design Methodology of Heavy Duty Machine Tool for Green Remanufacturing

In order to achieve the remanufacturers and utility extension of the old heavy-duty machine tool, an adaptable design method of the heavy machine tool that oriented to the green remanufacturing is proposed in this paper. The guiding ideology of the adaptable design is integrated into the green design and product development. The present status of research at home and abroad is summarized, and then the existing problems are analyzed. Axiomatic design is introduced to be the research principal line and the four design domains are extended to five ones including regeneration domain. By full analysis, the three future research directions including the adaptable modular design, the adaptable platform design and the adaptable interface design of the heavy-duty machine tool, are proactively introduced.

The Research of Software Testers Training Mode Based on O-Ring Theory

The talent training program is an important part of professional construction. Our college passed survey analysis and used the O-ring theory to train the talents who were badly needed and to reform and innovate traditional training mode with the analysis of enterprise professional ability and the professional construction thought that took employment demand as guide, took professional ability as principal line and took vocational sustainable development as fundament. All of these brought about an all-round development to skillful persons.

Assessment of Risks during Large-Span Steel Truss Arch Bridge Construction

Chongqing Chaotianmen Bridge is by far the world's largest three-span continuous half-through double-layer steel truss tied arch bridge. Risk evaluation and risk analysis are made to the bridge during construction period. At the same time, various measures are taken to avoid construction risks and accidents. The principal line of risk controls is clear with reasonable control measures. Chongqing Chaotianmen Bridge was completed and available for traffic on April 29, 2009, its various technical and quality indicators are in accordance with design and specifications.