نتایج جستجو برای: combinational curing

تعداد نتایج: 13993  

Journal: :علوم و تکنولوژی پلیمر 0
مهرداد محمود شکریه اشکان محمود اقدمی

present research involves the complete simulation of pultrusion manufacturing process of glass/polyester composites. for that purpose, the curing process is divided to two liquid and gel-solid phases. the physical characteristics of the resin consist of specific heat, viscosity and coefficient of heat transfer changes with variations of temperature and increasing the degree of curing process (α...

1998
Yuji Kukimoto Robert K. Brayton

We address three related issues on timing characterization of combinational modules. We first introduce a new notion called timing safe-replaceability as a way of comparing the timing characteristics of two combinational modules formally. This notion allows us to determine whether a new module is a safe replacement of an original module in terms of timing under any surrounding environment. Seco...

Journal: :JCIT 2009
Lin Chen Zongfang Zhou

It is very important for bank to control the credit risk of guarantee loan or combinational loan by evaluating the joint default risk of different enterprises. Firstly we apply a combinational copula function to measure the joint default risk of two enterprises with credit rating information; secondly the default intensity model is intended to analyze the default time distribution; thirdly we u...

1997
Henrik Hulgaard Poul Frederick Williams Henrik Reif Andersen

Boolean Expression Diagrams (BEDs) is a new data structure for representing and manipulating Boolean functions. BEDs are a generalization of Binary Decision Diagrams (BDDs) that are capable of representing any Boolean circuit in linear space and still maintain many of the desirable properties of BDDs. This paper demonstrates that BEDs are well suited for solving the combinational logic-level ve...

Journal: :Dental materials journal 2005
Nicoleta Ilie Karl-Heinz Kunzelmann Anuradha Visvanathan Reinhard Hickel

The purpose of this study was to analyze the curing behavior of a nanocomposite by assessing in real time the degree of cure at depths of 2 mm and 6 mm. The variation of hardness with depth, shrinkage stress, and curing time until gelation with 16 curing regimes was further investigated using one halogen and three LED curing units. In the present study, it was shown that the soft-start polymeri...

2012
Isil Cekic-Nagas Ferhan Egilmez Gulfem Ergun

PURPOSE The objective of this study was to compare the light transmittance of zirconia in different thicknesses using various light curing units. MATERIALS AND METHODS A total of 21 disc-shaped zirconia specimens (5 mm in diameter) in different thicknesses (0.3, 0.5 and 0.8 mm) were prepared. The light transmittance of the specimens under three different light-curing units (quartz tungsten ha...

2015
Byung Wan Jo Sumit Chakraborty Heon Kim

This data article provides a comparison data for nano-cement based concrete (NCC) and ordinary Portland cement based concrete (OPCC). Concrete samples (OPCC) were fabricated using ten different mix design and their characterization data is provided here. Optimization of curing time using the Weibull distribution model was done by analyzing the rate of change of compressive strength of the OPCC....

Journal: :journal of dentomaxillofacil radiology, pathology and surgery 0
shaghayegh razavi dental materials research cen ter, department of operative dentistry, faculty of dentistry, babol university of medical sciences, babol-iran. behnaz esmaeili dental materials research cen ter, department of operative dentistry, faculty of dentistry, babol university of medical sciences, babol-iran. hoda amiri mahdiye pakdaman ali bijani social determinants of health research center, babol university of medical sciences, babol-iran.

introduction: discoloration of resin composites is a common reason for replacement of these restorations. the aim of this study was to eva-luate the influence of different light curing de-vices on color stability of a microhybrid resin composite. materials and methods: 80 disc-shaped speci-mens (8 mm in diameter, 2-mm height) were fabricated from filtek z250 resin composite. specimens were divid...

2011
John Backes Brian Fett Marc D. Riedel

The accepted wisdom is that combinational circuits must have acyclic (i.e., loop-free or feed-forward) topologies. And yet simple examples suggest that this need not be so. Prior work advocated the design of cyclic combinational circuits (i.e., circuits with loops or feedback paths). A methodology was proposed for optimizing circuits by introducing cycles at the technologyindependent stage of s...

2013
Shaobo Chen

To reduce the labor cost and the workload required in the tobacco curing process, an intelligent tobacco curing control technique adopting color identification of the tobacco leaves is proposed. The HSI color space is used in color segmentation and the color recognition with fuzzy decision is used in the curing process. The curing controller can identify the curing stage by the color features o...

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