Recommendation accuracy is especially important in mobile e-commerce environments due to the limited screen size of mobile devices and relatively expensive connection costs. Mobile content tends to be fashionable and ...
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ISBN:
(纸本)1601320639
Recommendation accuracy is especially important in mobile e-commerce environments due to the limited screen size of mobile devices and relatively expensive connection costs. Mobile content tends to be fashionable and are geared for young users. This paper presents a novel method of building a more accurate recommender system for mobile content in a mobile ecommerce environment. The method is based on collaborative filtering, and models content diffusion and user preference transition and incorporates them in constructing pseudo ratings from implicit feedback data. In a variety of experiments, recommender systems based on the method showed significantly better recommendation accuracy than a pure collaborative filtering-based recommender system.
The National Aeronautics and Space Administration (NASA) and other Federal agencies face a wave of retirements in the near future which could lead to a significant loss of experience and knowledge. As a response, the ...
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The National Aeronautics and Space Administration (NASA) and other Federal agencies face a wave of retirements in the near future which could lead to a significant loss of experience and knowledge. As a response, the organizations need to utilize multiple strategies to capture, retain, and transfer knowledge and to maintain skill competency. This paper describes the use of the concept of a "community of practice" (CoP) and the initial steps to develop an Agency-wide discipline group for cost estimation and analysis into a more highly functioning community for the purpose of successful knowledge management. CoP resources from academia and other Federal sources are identified. A new model of a Knowledge Curriculum is also introduced.
Wang et al. [1] proposed a multiple-stream yield index S pk M . In addition to the point estimation, such as interval estimation are also important. In this paper we derived explicit forms of the cumulative distributi...
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Wang et al. [1] proposed a multiple-stream yield index S pk M . In addition to the point estimation, such as interval estimation are also important. In this paper we derived explicit forms of the cumulative distribution function and the probability density function of the estimated index S pk M . We developed a practical procedure and formula to provide practitioners an efficient tool for interval estimation on the yield index S pk M . An application example is illustrated. The procedure and formula are effective and easy to used, and should be expectant for in-plant applications.
Naphthapsilas price forecasting using Neuro-fuzzy system is a forecasting technique that applied information technology with statistics. 1950 daily prices were collected as a time-series data with trend component. The...
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Naphthapsilas price forecasting using Neuro-fuzzy system is a forecasting technique that applied information technology with statistics. 1950 daily prices were collected as a time-series data with trend component. The research found that Neuro-Fuzzy system is more accurate and more reliable than a statistical method; it also works well with continuous data and performs better with more training data. Neuro-Fuzzy system might be used with different data type, but, it might come across with other factors, e.g. seasonal or irregular event. The research also illustrates the multidisciplinary nature in todaypsilas world of works in the era of merging among many disciplines.
作者:
Joseph F. Yurso PresidentJoseph F. Yurso:is currently director of technical development for Q.E.D. Systems Inc. He received a Bachelors of Science in mechanical engineering from The Pennsylvania State University and an Masters of Science in mechanical engineering from the Naval Postgraduate School. He also completed a special management program at Carnegie Mellon University. Prior to entering the Navy as an engineering duty officer
Mr. Yurso was a refrigeration and air conditioning engineer for the Bureau of Ships. His Navy experience includes engineer officer of a combatant ship submarine type desk
quality assurance officer and production officer in naval shipyards and planning officer
quality assurance officer and deputy supervisor in Supervisor of Shipbuilding offices. His two command tours were as Supervisor of Shipbuilding Groton Connecticut (1980-81) and Shipyard Commander Portsmouth Naval Shipyard Kittery Maine (1981-84). He was awarded the Legion of Merit for both of these tours. Mr. Yurso has been a member of ASNE since 1964. He is a life member and a sustaining member of the Society. He has been active in several Sections including Charleston Northern and Southern New England and Tidewater. He is a former chairman of the Tidewater Section and was the chairman of the ASNE Fleet Maintenance Symposium in 1991. He served as Council vice president from 1993 to 1996 and as a member of Council for six years. He was a contributing author to the Society's first edition of Naval Engineering and American Sea Power. In 1993 he was awarded the Frank G. Law Award for his dedication and longtime service to the Society. Mr. Yurso maintains memberships in other societies including the American Society of Mechanical Engineers Sigma Xi the American Society for Quality Control Naval Institute and Tidewater Association of Service Contractors. He has held registered professional engineer status in two states and is listed inWho's Who in Science and Engineering.
In today's competitive environment, employers consistently place high value on graduates that have demonstrated, relevant skills and knowledge. Perhaps the most effective way for acquiring such relevant capabiliti...
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In today's competitive environment, employers consistently place high value on graduates that have demonstrated, relevant skills and knowledge. Perhaps the most effective way for acquiring such relevant capabilities is through co-op assignments and internships, yet these generally occur outside of the basic curricula even though they may have some educational credits attached. When incorporating the relevance of engineering practice directly into curricula, the use of input from external advisory boards is valuable and somewhat common. Industry visits, industrial seminar series, and incorporating external lecturers can also be effective in adding relevance to classes. However, while all of these are valuable, the most recognizable measure of having acquired relevant capabilities is achieving industry-specified professional validations and certifications. This requires carefully pre-designed curricula that account for multiple aspects. Merely providing instruction for professional certification tests and exams can border on training rather than educating, and is therefore more appropriate at a trade or commercial school rather than at a traditional academic institution. Using the advice and direction of external advisory boards, pertinent professional certifications have been identified and the content covered therein evaluated relative to its fit with various engineering and engineering technology curricula. By aligning aspects of professional certifications with established curricula, it is possible to integrate and intersperse the fundamentals and scope of the certifications into the curricula. As students move through their engineering or engineering technology programs they acquire the understanding and capabilities required to obtain appropriate professional certifications if they desire. This has been demonstrated for a variety of programs, including: information technology;engineeringmanagement;computer science;environmental, health and safety engineering te
This paper introduces an on-going research for developing a dynamic path planning system to improve mobile robot navigation in a dynamic building construction site by integrating a set of sensor-equipped robots into a...
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Due to the changing global business environment, the operations of engineering companies in the U.S. are moving from self sufficient engineering operations toward the integration of various engineering operations, inc...
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This paper reports the findings of a research project commissioned by the Construction Industry Institute (U.S.A.) to discover the secrets of successful implementation of lean principles and methods on capital project...
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This paper reports the findings of a research project commissioned by the Construction Industry Institute (U.S.A.) to discover the secrets of successful implementation of lean principles and methods on capital projects. Findings were drawn primarily from a review of the literature and from case studies. The best prospects for successful implementation were found in those projects driven by organizations committed to being lean enterprises;i.e., pursuing the lean ideal in accordance with lean principles, and using the best available tools and methods. As regards project implementation, findings and the corresponding recommendations are provided for contractual and organizational structures, project definition, design, supply, assembly and post project learning.
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