نتایج جستجو برای: size distribution psd

تعداد نتایج: 1109597  

Journal: :Chemical Engineering Journal 2022

Particle size distribution (PSD) is one of the critical attributes crystals. PSD not only influences downstream processes but also controls final product performance in crystallization. In this work, we have used model system methanol–water-paracetamol for carrying out anti-solvent crystallization to produce paracetamol With reference a base case stirred tank, three devices connected tank with ...

Journal: :Frontiers in Earth Science 2022

Loess is widely deposited in arid and semi-arid areas characterized by low dry density, developed pore space, loose structure, which not commensurate with high structural strength shear the state. Many natural phenomena experimental results show that intact loess very sensitive to change of water content, a slight increase content can cause rapid reduction strength. Abundant information availab...

Journal: :Paste ... 2021

Cemented paste backfill (CPB) is an engineered design mixture that commonly implemented to fill the left behind voids of mining. Depending on sides stope under vertical and horizontal exposure, different designs are needed provide minimum required strength continue mining underfilled mass safely. Various parameters affect CPB need be checked daily as quality control. One most important these pa...

Journal: :Journal of Hydraulic Engineering 2023

This study evaluates the laser in situ scattering and transmissometry (LISST) instrument LISST-SL2, a diffraction for suspended sediment sampling rivers, with concurrent physical measurements of concentration (SSC) particle size distribution (PSD) as well velocity by an acoustic Doppler current profiler (ADCP). We collected 136 LISST-SL2 samples along 61 SSC measurement, which 24 included PSD m...

Journal: :Agriculture 2023

In the literature, mainly particle-size distribution (PSD) analyses in soil catenas, of e.g., moraine and riverine landscapes were discussed. Analysis comparison PSD (ML) ice-dammed lakes (ID-LL) not studied. Since landscape origin has diversified relief is under intensive agricultural use, aspects erosion are great importance. The changes studied 14 catenas (toposequences) eroding soils at upp...

2013
Xin Dang

Estimation of the power spectral density (PSD) of noise is crucial for retrieving speech in a noisy environment. 3 novel methods for estimating the non-white noise PSD of noisy speech based on a generalized gamma distribution and 3 criterions are proposed, which are minimum mean square error (MMSE), maximum a posteriori (MAP) and Maximum likelihood estimation (MLE). Because of the highly non-st...

Journal: :The Journal of neuroscience : the official journal of the Society for Neuroscience 2003
Jennifer D Petersen Xiaobing Chen Lucia Vinade Ayse Dosemeci John E Lisman Thomas S Reese

Postsynaptic densities (PSDs) contain proteins that regulate synaptic transmission. We determined the positions of calcium/calmodulin-dependent protein kinase II (CaMKII) and PSD-95 within the three-dimensional structure of isolated PSDs using immunogold labeling, rotary shadowing, and electron microscopic tomography. The results show that all PSDs contain a central mesh immediately underlying ...

Journal: :Advances in Civil Engineering 2021

To examine the pore-size distribution (PSD) evolution of intact, compacted, and saturated loess during deformation associated with consolidation or shearing, nominally identical specimens were consolidated to different confining stresses sheared sequential axial strains under same stress, PSD each deformed specimen was characterized using Mercury intrusion porosimetry (MIP) technique. The resul...

Journal: :Frontiers in Marine Science 2021

Particle size distribution (PSD) in the ocean is a fundamental property that influences carbon export and food webs; however, PSD variation its causes oligotrophic oceans are not entirely clear. Here, we used Laser In-Situ Scattering Transmissometry to investigate (size range 5.2–119 ?m) related variables at 11 stations surface layer (0–20 m) of Kuroshio region western North Pacific, where stro...

2008
Jaesung Park Yang Liu Kenneth D. Kihm Lawrence A. Taylor

The particle size distribution PSD of lunar dust, the 20 m portion of the regolith, was determined as an initial step in the study of the possible toxicological effects it may have on the human respiratory and pulmonary systems. Utilizing scanning electron microscopy, PSDs were determined for Apollo 11 10084 and 17 70051 dust samples, as well as lunar dust simulant JSC-1Avf. The novel methodolo...

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