نتایج جستجو برای: prox
تعداد نتایج: 483 فیلتر نتایج به سال:
Bauschke, Lucet, and Trienis [SIAM Rev., 50 (2008), pp. 115–132] developed the concept of the proximal average of two convex functions. In this work we show the relationship between the proximal average and the Moreau envelope and exploit this relationship to develop stability theory for a generalized proximal average function. This approach allows us to extend the concept of the proximal avera...
This study reveals the influence of different TiO 2 supports on catalytic performance and phase transformations Co 3 O 4 during CO-PrOx.
Stochastic gradient algorithms estimate the gradient based on only one or a fewsamples and enjoy low computational cost per iteration. They have been widelyused in large-scale optimization problems. However, stochastic gradient algo-rithms are usually slow to converge and achieve sub-linear convergence rates,due to the inherent variance in the gradient computation. To accelerate...
CuCe mixed oxide is one of the most studied catalytic systems for preferential CO oxidation (CO-PrOx) purification hydrogen-rich gas stream. In this study, a series ceria supports were prepared via citrates-hydrothermal route by altering synthesis parameters (concentration and temperature). The resulting used preparation mixed-oxide catalysts wet impregnation. Various physicochemical techniques...
AIMS The term lymphangiosarcoma has largely been abandoned in the current classification of endothelial neoplasms. Recently, a number of lymphatic-associated antibodies have been developed for immunohistochemistry, which frequently stain angiosarcomas, implying lymphatic or mixed lymphatic and blood vascular differentiation is common. The aim was to investigate further lymphatic antigen express...
In this paper, we propose a simple variant of the original stochastic variance reduction gradient (SVRG) [1], where hereafter we refer to as the variance reduced stochastic gradient descent (VR-SGD). Different from the choices of the snapshot point and starting point in SVRG and its proximal variant, Prox-SVRG [2], the two vectors of each epoch in VRSGD are set to the average and last iterate o...
nanocrystalline ceria has been considered as support for carbon monoxide preferentially oxidation. in this study ceria was prepared by precipitation method and the effects of preparation conditions, such as ph of solution (8-10), aging time (1-12 hr), drying temperature (80-120 °c), calcination time (2-6 hr) and temperature (400-600 °c) were investigated on ceria synthesized powders properties....
In this issue of Blood, Kang and colleagues describe a molecular signaling network involving Notch, COUP-TFII, and Prox-1, along with other supporting molecules, that regulates the specification and maintenance of lymphatic endothelial cells.
The viability of gold supported on lanthanum-modified HAP catalysts is investigated for CO preferential oxidation (PROX) in H2-rich stream. All samples comprise small nanoparticles (NPs) Au (< 4 nm). Addition La enhances the chemisorption CO, whereas it lowers that H2 and H2O. Moreover, lanthanum improves reducibility mobility oxygen. FTIR studies show under conditions exists two distinct forms...
The water drink test is a good tool to evoke dyspeptic symptoms. To what extent these symptoms are related to altered gastric distribution is not clear. Therefore, we determined gastric volumes after a drink test using SPECT. After a baseline scan 20 healthy volunteers (HV) and 18 patients with functional dyspepsia (FD) underwent a drink test (100 mL min(-1)) followed by five scans up to 2 h. D...
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