Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 47 for “"Crawler"”.
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A novel defense mechanism against web crawler intrusion
<p>Web robots also known as crawlers or spiders are used by search engines, hackers and spammers to gather information about web pages. Timely detection and prevention of unwanted crawlers increases privacy and security of websites. In this research, a novel method to identify web crawlers is …
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Localization of a robotic crawler for CANDU fuel channel inspection
… positional accuracy of +/- 3.6 mm for the robot crawler over the full 6350 mm distance that the robot travels inside the pressure tube. This is extrapolated from the test results completed over the shorter length test bench with simulated surface unevenness. The key benefits of the pipe crawling …
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Design and development of a robotic crawler for CANDU fuel channel inspection
For the design of a new robotic crawler drive unit for CANDU fuel channel inspection, a complete design and screening process was done in order to fulfil the objective of this research. A brief explanation of CANDU reactors is provided along with a discussion of the inspection systems that are …
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Cooperative Hoisting with Dual Crawler Cranes: Modeling, Motion Planning, and Control under Constraints
… erection, and modular plant construction dual crawler cranes (DCCs) have become essential equipment for handling oversized and heavy loads. Their cooperative hoisting capability enables the manipulation of massive structures beyond the lifting capacity of a single crane. However, due to the …
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Seafloor robotic crawler for production of deepwater tin deposit: a dry environment model, A
Includes bibliographical references (pages 81-85).
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A reduced-order crawler crane model with active control to attenuate the transient vibrations
… equations describing the motion of a crawler crane in a plane are formulated by applying Lagrange's equation to the system kinetic energy, potential energy and virtual work. The transient response of the crane system due to the vertical drop of the suspended load is simulated by …
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Design of a power, communications, and cable system for use with a robotic crawler for CANDU fuel channel inspection
… downtime. The proposed system is a robotic crawler inspection system which can inspect the fuel channels while sealed inside the reactor. This allows for simultaneous inspection of multiple fuel channels using multiple copies of the system. The work in this thesis describes improvements to …
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Intelligent Event Focused Crawling
… We incorporated that model into the focused crawler algorithm. For the focused crawler to leverage the event model in predicting a webpage's relevance, we developed a function that measures the similarity between two event representations, based on textual content. Although the textual …
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Understanding Japanese Maple Scale Biology to Inform Sustainable Pest Management Practices in Virginia Nurseries
… timing for scouting and spraying through peak crawler emergence and the identification of overwintering life stages. Understanding JMS dispersal patterns within tree canopies can lead to the refinement of scouting methods, such as strategically placing the tape method (for monitoring crawlers). …
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Lazy Preservation: Reconstructing Websites from the Web Infrastructure
… the WI are then investigated, and a new type of crawler is introduced: the web-repository crawler. Several experiments are used to measure and evaluate the effectiveness of lazy preservation for a variety of websites, and various web-repository crawler strategies are introduced and evaluated. The …
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Distribusi hama kutu sisik merah (Aonidiella aurantii) pada perkebunan jeruk manis (Citrus sinesis) dan jeruk keprok (Citrus reticulata)
… jeruk manis adalah mengelompok, sedangkan fase crawler jeruk keprok adalah acak dan pola sebaran kumulatif fase imago dan crawler adalah mengelompok. Pola sebaran A. aurantii fase imago dan crawler pada jeruk keprok adalah acak, sedangkan secara kumulatif fase imago dan crawler pada jeruk keprok …
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Distribusi beberapa jenis kutu sisik pada perkebunan jeruk manis (Citrus sinensis)
… sebaran L. beckii fase imago mengelompok, fase crawler acak dan secara kumulatif acak. Pola sebaran A. aurantii fase imago dan crawler adalah acak, dan secara kumulatif adalah acak. Pola sebaran C. viridis fase imago dan crawler adalah acak, sedangkan secara kumulatif acak. Faktor abiotik yang …
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Rheology of complex fluid films for biological and mechanical adhesive locomotion
… the present research is to enable a mechanical crawler to climb walls and walk across ceilings using adhesive locomotion. A properly selected slime simulant will enable a mechanical crawler to optimally perform while climbing in the horizontal, inclined, and inverted positions. To this end, the …
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A Bandwidth-Conserving Architecture for Crawling Virtual Worlds
… and more fragmented, the need for a data crawler and distributed search service will continue to grow. By increasing the visibility of content across virtual world servers in order to better collect and integrate the 3D data we can also improve the crawling and searching efficiency and …
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Development of a 6 degree-of-freedom manipulator arm for use on an urban search and rescue robot
… manipulator arm is mounted on the crawler base. The USRR is designed to traverse difficult terrain in search of survivors. The base is therefore equipped with variable geometry tracks to enable it to traverse stairs and other tricky terrain. The sensor payload is equipped with life …
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Uusing the KDJ as a trading strategy on biotech companies
… get the historical and current stock data by web crawler, analyze the quantitative data and build a new model involved with the KDJ. Taking biotech companies marketed in the United States and B-share marketed in China as the research subjects, the result shows increased profits compared with the …
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Design and enhancements for a CANDU robotic fuel channel inspection system
… to hold the necessary cables for the robotic crawler to operate and provide additional odometry data. A deployment scheme for the robotic inspection system integrated into the Bruce Reactor and Maintenance System (BRIMS) with little to no modifications to maintain modularity was proposed. An …
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Evaluation of the clinical outcome of curvilinear transport distraction osteogenesis and revascularised fibula free flaps in the reconstruction of large post-maxillectomy defects
… disc was attached to the metal plate of the 'crawler' via small titanium screws. The crawler was then moved on the reconstruction plate (BiometTM Zimmer Biomet,
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In Service Above Ground Storage Tank Inspection with a Remotely Operated Vehicle (ROV)
… shown that automated inspection systems where a crawler carries the inspection probes, while the tank remains filled, can circumvent the need for the preparation process. However, there are some serious limitations to such systems as the crawlers used are in direct contact with the tank's …
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