mechanical particle size reduction techniques

... to correlate the size and the size dispersion of the AuNPS with the LSPR behavior Figure 3A shows the trends in the particle size and the size dispersion over the course of the reduction as observed ... 65 523 520 3.4 (0.4) 3.3 (0.3) 12 particle size (nm)b,c % relative size dispersion a In each case, 200 particles were counted to determine the size and the size dispersion b The AuNPs were less ... of the reduction, the particles had a large size dispersion of 32% At 10 min, the average size was 1.9 ( 0.6 nm Over time, the polydispersity decreased slightly to 28% at 30 min, and the particles...

Ngày tải lên: 18/09/2013, 21:27

Ngày tải lên: 22/12/2013, 02:18

... sample with homogeneous distribution in particle size Besides that, the hydrothermal method requires the long time reaction and its distribution in particle size is in the broadening range In this ... easily because the size effect is exhibited very clear By using the Scherrer formula, we can calculate the mean sizes of the CdSe QDs from the peak width at half-maximum Particle sizes obtained from ... are depicted in the table Table Particle size of samples with reaction time and 10 D (radian) 0,0697 0,06806 2θ 25,381 25,402 These results show that the particle sizes are about nm When the crystalline...

Ngày tải lên: 14/03/2014, 13:20

... reduction The performance is measured in three different reduction tasks: phrase reduction, hierarchical rule reduction, and joint reduction As the reduction ratio becomes higher, the model size, ... the size of all translation models, the reduction is needed to be performed for both the phrase table and the hierarchical rule table simultaneously, namely joint reduction Similar to phrase reduction ... 0.290 0.286 0% 10% 20% 30% 40% 50% Phrase Reduction Ratio 60% 0% 10% 20% 30% 40% 50% 60% Hierarchical Rule Reduction Ratio 0% 10% 20% 30% 40% 50% Joint Reduction Ratio 60% Figure 1: Performance...

Ngày tải lên: 23/03/2014, 14:20

... for model training None of the pruning techniques we consider are loss-less Therefore, whenever we compare pruning criteria, we so by comparing the size reduction of the pruning criteria at the ... bigrams in the model Figure 2: Comparison of pruning criteria Table 1: LM size comparison at CER 13.8% criterion # of bigram size (MB) % of prob Combining Two Criteria We now investigate methods ... criterion) for different model sizes We show how an optimal function which defines the optimal settings of the threshold pairs is efficiently established using our techniques probability 6.1 100.0%...

Ngày tải lên: 23/03/2014, 20:20

... failure Role of mechanical ventilation 2/ Initiating (and de-escalating) mechanical ventilation Invasive vs non-invasive techniques Strategies ... OBJECTIVES After studying this module on Mechanical ventilation, you should: Understand the mechanical causes of respiratory failure Have the knowledge to institute mechanical ventilation safely Understand ... [3] Task Initiating (and de-escalating) mechanical ventilation 2/ INITIATING (AND DE-ESCALATING) MECHANICAL VENTILATION In critical care, the indicaton for mechanical ventilation may be simply for...

Ngày tải lên: 24/03/2014, 05:20

... exclusion of the separated particles from a part of the pores according to the ratio of their size to the size of the pores The particles whose sizes are larger than the size of the largest pores ... the size- based separation of the particles can be rather complicated because various size particles sediment together and form a complex, superposed concentration gradient in which all size particles ... contain various information on the particle- dispersing Suid and particle} particle interactions, on the size Suctuations in time, on the transport behaviour of the particles in the dispersing Suid,...

Ngày tải lên: 09/05/2014, 17:01

... To improve the mechanical and chemical properties of the chromia/alumina castable, which is widely used in IGCC application, the ultrafine alumina powder with different particle size distribution ... and microstructure evaluation by an SEM study It's proved that the specific surface area and particle size distribution of ultrafine powders in matrix parts greatly influence the densification ... improve the flow ability of the chromia/alumina refractory castable Experimental procedure The particle size distribution of the castable was adjusted to a theoretical self-flowing continuous curve...

Ngày tải lên: 20/06/2014, 23:20

... two-dimensional model reduction (the now famous FHN model) which captures the essential qualitative dynamics of the HH model Rinzel [17, 18] then performed a physiological model reduction of the HH ... neural dynamics observed Rinzel’s first reduction step is to relax the fast gate m instantaneously to its quasi-steady-state value m = m∞ (V ) This model reduction ‘technique’ of relaxing fast ... In this article, we will show when such a reduction step is mathematically justified and point out some potential problems of this technique The second reduction step used by Rinzel is based on...

Ngày tải lên: 20/06/2014, 23:20

Ngày tải lên: 21/06/2014, 01:20

... noncontiguous spectral occupancy Rather than introducing significantly new PAPR reduction techniques, we focus on the spectral regrowth reduction that existing schemes and variations of them can achieve for ... technique that can be used in combination with PAPR reduction techniques Finally, Section contains summary and conclusions Some of the variations of PAPR reduction and predistortion presented here have ... predistortion of the HPA characteristic (as proposed in Section 7) is a very useful complement to PAPR reduction techniques for reducing the required power backoff For small values of p the out-of-band radiation...

Ngày tải lên: 22/06/2014, 19:20

... of the polymer core-shell Figure 3(c) shows the particle size distribution for the ratio 3:4, and gives a particle size 222.2 nm This particle size is still within the desired range, meaning ... (%) Particle size (nm) 2:2 2 50.5 94.1/798.6 2:3 62.4 264.7 3:4 65.5 222.5 3:5 65.5 108.2 Figure 2: Conversion and particle size of feeding time Emulsion Polymers of Core-Shell 122 The particle ... times up to h not affect the particle size This is illustrated in Figure 4, as all particles fall within the 200–300 nm range Figure 4: Plot of conversion and particle size as a function of aging...

Ngày tải lên: 07/08/2014, 14:20

... contribution of this thesis is to develop some novel model order reduction techniques for simulation and anaysis of the microelectromechanical behaviors in MEMS devices and systems that involve ... capability of simulating the mechanical behaviours of specific MEMS devices In the MEMCAD software developed by Massachusetts Institute of Technology (Senturia et al., 1992), the mechanical analysis was ... boundary element techniques, fast multipole methods and pre-corrected-FFT methods (Philips and White, 1994) for capacitance extraction and electrostatic force computation The coupled electromechanical...

Ngày tải lên: 16/09/2015, 17:12

... example, with about the same mean particle size, a suspension with a larger particle size range has a lower permeate flux than that with a smaller particle size range, even though the concentration ... small particles that had sizes close to that of the membrane pore sizes The study concludes that particle size distribution plays a very important role in microfiltration performance and particles ... Effect of Small Particles on Membrane Fouling 51 4.5 Effect of Filtering Small Particle Suspension before Large Particle 54 Suspension and Large Particle Suspension before Small Particle Suspension...

Ngày tải lên: 05/10/2015, 19:04

... decreases file size, the resulting virtual bones lose accuracy, and the reduction should not be taken too far On average, a reduction to 2.5 to 10% is the maximum tolerable, depending on bone size and ... and exceed GB in file size To reduce the size, it is useful to load the files into Rhinoceros® and re-save them as binary STL files, which have a significantly smaller size without any data loss ... representation of the surface Usually a reduction to 20% is hardly noticeable to the human eye if a bone is displayed at full-screen size Therefore, a slight to generous reduction may be acceptable depending...

Ngày tải lên: 22/02/2014, 08:20

... preparation techniques Several different instrumentation techniques have been described in the literature, a summary of some more popular techniques is presented in Table Some of these techniques ... instrument size Stepdown techniques commence preparation using larger instrument sizes at the canal orifice, working down the root canal with progressively smaller instruments Major goals of crowndown techniques ... find apical extension (i.e size of final reamer) or point size were among the factors influencing treatment outcome Mechanical preparation of root canals In summary, the reduction of intra-canal...

Ngày tải lên: 09/03/2014, 00:20

... (Fisher, 1964) 348 A G Bengough & C E Mullins EFFECTS O F MECHANICAL IMPEDANCE ON ROOT GROWTH Experimental techniques Existing experimental techniques can be divided into several different catagories ... (1974, 1978) who also analysed theoretically the mechanics of the changes in cell size and shape that can occur in mechanically impeded root tips It is clear that rigid penetrometers cannot mimic ... (Henry's law) Effect of a constant mechanical impedance on root elongation rate Plots of relative root elongation rate against pressure are shown in Figs and , and the techniques used are summarized...

Ngày tải lên: 24/03/2014, 05:20

... MacNeal Mechanical Properties of Polymers and Composites: Second Edition, Revised and Expanded, Lawrence E Nielsen and Robert F Landel Mechanical Wear Prediction and Prevention, Raymond G Bayer Mechanical ... Industrial Heating Principles, Techniques, Materials, Applications, and Design © 2005 by Taylor & Francis Group, LLC DK340X_FM.fm Page ii Wednesday, April 27, 2005 7:52 AM MECHANICAL ENGINEERING A ... Procedures, Ray E Monahan Refractory Linings Thermomechanical Design and Applications, Charles A Schacht Geometric Dimensioning and Tolerancing: Applications and Techniques for Use in Design, Manufacturing,...

Ngày tải lên: 02/04/2014, 15:28

... of gold polymer reduction and gold hydrolyzed polymer reduction, particles sizes from ~4 to 100 nm can be synthesized Figure shows a TEM micrograph illustrating the different sizes available ... nanoparticles became elliptical in shape and very polydispersed The nanoparticle sizes, when aerated at 42.9 mL/min, ranged from to 40 nm in diameter with some aggregated particles; this size ... instability and eventual particle aggregation [13] Non-chemical based reduction methods, to synthesize AuNPs, have also been employed Size- selected AuNPs have been synthesized by use of laser irradiation...

Ngày tải lên: 21/06/2014, 03:20

... Initialize a population of particles with random positions and velocities, where each particle contains K variable Step Evaluate the fitness values of all particles, let pbest of each particle and its objective ... of the best initial particle Step Update the velocity and position of each particle according to (7) and (8) Step Evaluate the objective values of all particles Step For each particle, compare ... best (gbest) particle is denoted by W G =(Wg,1 , Wg,2 , , Wg,K ), which represents the best particle found so far at time t in the entire swarm The new velocity vi (t + 1) for particle i is...

Ngày tải lên: 21/06/2014, 23:20