Salt weathering of sandstone under dehydration and moisture absorption cycles: an experimental study on the sandstone from Dazu Rock Carvings

2021 ◽  
Author(s):  
Shaojun Yan ◽  
Ni Xie ◽  
Jianhui Liu ◽  
Li Li ◽  
Lizhou Peng ◽  
...  
Keyword(s):  
Experimental Study ◽  
Moisture Absorption ◽  
Salt Weathering

Experimental Study on Hygroscopicity of Rapeseed (Brassica Napus)

2012 ◽  
Vol 479-481 ◽  
pp. 2275-2278
Author(s):  
Ming Jin Yang ◽  
Wu Ming Xu ◽  
Tian Tang ◽  
Ling Yang ◽  
Feng Liu
Keyword(s):  
Experimental Study ◽  
Brassica Napus ◽  
Relative Humidity ◽  
Moisture Absorption ◽  
Early Period ◽  
Critical Relative Humidity ◽  
Temperature And Humidity ◽  
Higher Temperature

The hygroscopicity property of the rapeseed at different temperature and humidity was experimental studied in this paper. Tested results show that: the moisture absorption rates increase with the increase of relative humidity at the early period of absorption, and higher temperature leads to earlier reach of moisture equilibrium; the critical relative humidity(CRH) increases with the increase of temperature; the optional relative humidity for safety storage of rapeseed should be controlled less than 60%.

An Expatiate View of Solid Clay Based Desiccant Mould with Varying Void Fraction on Absorption

2014 ◽  
Vol 984-985 ◽  
pp. 94-99 ◽  
Author(s):  
Ram P. Mohan ◽  
V. Shanmugam ◽  
Palanisamy Senthil Kumar
Keyword(s):  
Experimental Study ◽  
Particle Size ◽  
Calcium Chloride ◽  
Void Fraction ◽  
Moisture Absorption ◽  
Absorption Capacity ◽  
Drying Chamber

Experimental study on moisture absorption of solid clay based desiccant mould with varying void fraction is presented in this work. Solid desiccant moulds of three types by varying void fraction with the composition of 10% cement, 10% of calcium chloride, 20% vermiculite with particle size of 5mm and above and 60% of bentonite were prepared and tested under uniform conditions in the drying chamber. The results show that the moisture absorption capacity of the mould is significantly affected when the void fraction is changed.

Experimental Study of Hygroscopicity of Lunar Soil Simulant

2013 ◽  
Vol 357-360 ◽  
pp. 1405-1410
Author(s):  
Rui Yang Shi ◽  
Jian Qiao Li ◽  
Meng Zou ◽  
Shi Chao Fan ◽  
Ling He ◽  
...  
Keyword(s):  
Experimental Study ◽  
Natural Environment ◽  
Storage Time ◽  
Moisture Absorption ◽  
Lunar Soil ◽  
Engineering Properties ◽  
Water Molecules ◽  
Saturation State ◽  
Long Time ◽  
Weighing Method

The lunar soil simulants using for vehicle-terramechanics research on the ground need to expose in air containing water molecules for a very long time. The influence of the engineering properties of lunar soil simulant caused by air moisture should be determined. This paper has obtained the moisture absorption of JLU-1, JLU-2 and SNJ-4 using weighing method. The result indicates that the hydroscopicity of three lunar soil simulant are: SNJ-4>JLU-2>JLU-1, all less than 2%. It shows that even in saturation state, the moisture content of three specimens is very little. The length of storage time of lunar soil simulant in natural environment has little effect on its engineering properties. Lunar soil simulant after be made can be storaged well for a long time in the natural environment, and used for ground foundation test. The results can supply the reference to evaluate the engineering properties and formulate the suitability standards of lunar soil simulant.

Experimental study on the restoration from a tilt-azimuth series for improvement in resolution

1995 ◽  
Vol 53 ◽  
pp. 636-637
Author(s):  
Norio Baba ◽  
Norihiko Ichise ◽  
Syunya Watanabe
Keyword(s):  
Experimental Study ◽  
Spherical Aberration ◽  
Incident Beam ◽  
Optical Parameters ◽  
Beam Tilting ◽  
Illumination Method ◽  
Restoration Method ◽  
Illumination Mode

The tilted beam illumination method is used to improve the resolution comparing with the axial illumination mode. Using this advantage, a restoration method of several tilted beam images covering the full azimuthal range was proposed by Saxton, and experimentally examined. To make this technique more reliable it seems that some practical problems still remain. In this report the restoration was attempted and the problems were considered. In our study, four problems were pointed out for the experiment of the restoration. (1) Accurate beam tilt adjustment to fit the incident beam to the coma-free axis for the symmetrical beam tilting over the full azimuthal range. (2) Accurate measurements of the optical parameters which are necessary to design the restoration filter. Even if the spherical aberration coefficient Cs is known with accuracy and the axial astigmatism is sufficiently compensated, at least the defocus value must be measured. (3) Accurate alignment of the tilt-azimuth series images.

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