توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱Effect of cooling bath on LLDPE microporous membrane structure in thermally induced phase separation
نویسنده(ها): ، ، ،
اطلاعات انتشار: هفتمین کنگره ملی مهندسی شیمی، سال
تعداد صفحات: ۶
Thermally induced phase separation (TIPS) is versatile method for making microporous membranes. The purpose of this work is to investigate the coolingbath temperature and type effects on the membrane structure prepared via TIPS method. The morphology of the resulting membrane shows a typical bicontinuous structure. When quenching into water at different temperatures, a larger pore size was obtained at higher temperature. Pore sizes are about 0.7 μm, 1.2 μm, and 2.2 μm for the water cooling bath with 273K, 303K and 333K. Porosity and tensile tests confirm these results. When the composition of the coagulation bath is similar with the diluents, the chemical potential difference of diluents would be declinedand the concentration of diluent in polymer lean phase would be kept constant in stagnant condition which leads the droplets to grow and the pore size of the systemwill be larger. However in water cooling bath, the concentration of diluent in polymer lean phase decreased rapidly and pore size growth is decelerated which result is lower porosity<\div>

۲Novel efficient designs for QCA JK flip flop without wire crossing
نویسنده(ها): ،
اطلاعات انتشار: دومین کنفرانس بین المللی و سومین همایش ملی کاربرد فناوری های نوین در علوم مهندسی، سال
تعداد صفحات: ۶
Recently, the conventional CMOS technology faces serious challenging problems due to the physical limitations in its feature size reduction. Quantum dot cellular automata (QCA) with having the higher speed, smaller size and lower power consumption has the potential to be one of the features promising nanotechnologies to replace CMOS technology. In this paper, novel efficient designs for QCA JK flip flop without wire crossing are presented. The proposed JK flip flops are designed and tested in QCADesigner software. In comparison with the previous QCA and CMOS JK flip flops, our designs are optimized in terms of cell count, area, power and delay. Therefore, these structures can be used in designing of QCA based circuits.<\div>
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