In the spring of 2007, worcesterpolytechnicinstitute introduced a BS degree program in Robotics Engineering. The degree program is a collaborative effort, involving faculty from the departments of Computer science, ...
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This paper describes a graphical data mining system called AutoDomainMine. It is based on our proposed approach of integrating clustering and classification to mine scientific data stored in a database. The data consi...
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ISBN:
(纸本)1595936866
This paper describes a graphical data mining system called AutoDomainMine. It is based on our proposed approach of integrating clustering and classification to mine scientific data stored in a database. The data consists of input conditions of scientific experiments and graphs plotted as their results. This system mines the stored data in order to submit exact or approximate ranked responses to user queries intended to optimize the scientific processes.
Conclusions of this research and implications for teaching can be summarized as follows: The level of comprehension evident in students' written explanations of their way of understanding and applying the lever ru...
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The utilization of Cambridge Engineering Selector (CES4) software and the response of the response of the students towards it is discussed. The test hypotheses about how it might be received by students with different...
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The utilization of Cambridge Engineering Selector (CES4) software and the response of the response of the students towards it is discussed. The test hypotheses about how it might be received by students with different learning styles is also presented. Using educational versions of the software, students are able to browse a database of material attributes, learn about and compare different materials in a graphical manner, and select materials using a variety of design criteria. It is considered that judging students, on average, was more useful than percieving students, reflecting dominant use of the software as a structured decision-making analysis tool.
Educational technologies like web-deployed assessments and student response systems provide opportunities for formative assessment that would be expected to enhance student learning and help create a more active class...
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Educational technologies like web-deployed assessments and student response systems provide opportunities for formative assessment that would be expected to enhance student learning and help create a more active classroom environment. These technologies can be used in ways that might help or hinder particular types of learners, yet not much research has been done in this area. This paper describes student response to Blackboard™-delivered "preparation assessments" and use of the Classroom Performance System™ in two offerings of a large-enrollment introductory materials science course. The Myers Briggs Type Indicator (MBTI) was used as a measure of learning style, and pre- and post-course questionnaires probed students' reactions. Initial findings indicate that Judging and Perceiving students respond differently to both technologies, and that students with Extroversion preferences tend to react in particular ways to use of CPS. Effects of gender, however, are as or more pervasive than effects of type, and gender and type interact in complex ways.
The performance of a series of mineral oil based quenchants has been investigated using the CHTE Quench Probe System and probe tips of 4140 steel to determine the cooling rate, heat transfer coefficient, Hardening Pow...
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ISBN:
(纸本)0871707810
The performance of a series of mineral oil based quenchants has been investigated using the CHTE Quench Probe System and probe tips of 4140 steel to determine the cooling rate, heat transfer coefficient, Hardening Power (HP) and Tamura's V indices in terms of the physical properties of quenchants;e.g. viscosity and oil start temperature. The Quench Factor, Q, in terms of the hardness of the quenched parts was also calculated. The lumped parameter approximation was used to calculate the heat transfer coefficient as a function of temperature during quenching. The results revealed that the maximum cooling rate increases with decrease in quenchant viscosity. As viscosity increases, Tamura's V is nearly constant, while the HP decreases. For the selected oils, cooling ability of quenching oil increases with the increase in oil operating temperature, reaches a maximum and then decreases. The heat transfer coefficient increases with the increase in hardening power and maximum cooling rate. As the viscosity increases, the quench factor increases, which indicates the cooling ability of the oil decreases since the higher quench factor means the lower cooling ability of the oil. The hardness decreases with the increase in quench factor.
A CHTE probe-quenching system, employing a 6061 aluminum probe, was quenched in distilled water while varying bath temperature and the rate of agitation. Time vs. temperature data was collected during the quench by us...
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ISBN:
(纸本)0871707810
A CHTE probe-quenching system, employing a 6061 aluminum probe, was quenched in distilled water while varying bath temperature and the rate of agitation. Time vs. temperature data was collected during the quench by use of an ungrounded K-type thermocouple embedded inside the probe, while cooling rates were calculated. A Quench Factor Analysis (QFA) was also performed to quantitatively classify the quench severity. The data showed an increase in maximum cooling rate as bath temperature decreased and agitation level increased. In addition, it was found that at higher levels of agitation, there was also an increase in the standard deviation of the cooling rate.
The CHTE quench probe system was modified to test the quenching performance of a variety of different gases at atmospheric pressure. The tests were performed with Argon, Helium and air at varying gas velocities. The q...
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ISBN:
(纸本)0871707810
The CHTE quench probe system was modified to test the quenching performance of a variety of different gases at atmospheric pressure. The tests were performed with Argon, Helium and air at varying gas velocities. The quench probe alloys used in this study were 304 stainless steel and 4140 steel. The heat transfer coefficients were calculated from the experimental measurements of temperature as a function of time. The experimental results showed that Helium produced the largest heat transfer coefficients, followed by air and argon. The data showed a dip in the cooling rate and, therefore, in the apparent heat transfer coefficient vs. temperature curve for the 4140 steel but not for 304. This dip was explained as being due to heat that is released as Austenite transformed to Bainite and Pearlite in this temperature range.
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