Search results

The submarine cable is affected by a variety of factors in the sectors of manufacturing, transportation and installation.
The ultra-high voltage oil-filled submarine cable used in this project is affected by a variety of factors in the sectors of manufacturing, transportation and installation.
Main insulation withstand voltage test is the main method to assess cable insulation properties and the ability to withstand over-voltage.
DC voltage test is easier to detect mechanical damage insulation, bubbles, moisture and other defects; (4) AC voltage test need several cycles to reaching the voltage level needed in the test, while the time of DC voltage test is significantly shortened.
Therefore, the difference of high-voltage lead is one of the major factor leading to the differences of each phase.

And it obtained that the roadway deformation not only by mining impact, but also considering the geological environment surrounding rock conditions, tunnel position in which layers of rock, rock properties and other factors.
In the workface mining later, resulting in a number of roadway and chamber groups affected by exploiting coal seam[4-6].
So the 11-2 waste belt conveyor roadway vertical stress is the main factor of the sidewall deformation, it is shown in Fig.4.
It could be found in the deep mining, the roadway surrounding rock shown the complex rheological behaviors, and the lithology and mechanical parameters largely determined the deformation of the roadway.
Therefore, it would to control the deformation that could not only retain the large protection pillar sizes, but also should consider various factors, such as the lithology, water and other factors.

By macroscopic mechanical experiments and scanning electron microscope test, experimental results that PAM enhanced the mechanical properties of cement soil ，which the main reasons are as follow: (1) PAM is a long-chain polymer by the polymerization of acrylamide monomer.
When PAM molecules adsorbed on the particle surface, they will greatly improve the surface properties of these micro-particles and film formed on the surface of the cement particles, which ensure full hydration of the cement.
It is prone chemical reaction for PAM molecules produced carboxylic acid groups and Ca(OH)2 by the hydrolysis to form stable calcium salt of carboxylic acid, reducing the concentration of the transition zone of Ca(OH)2, resulting in poor crystallinity, reducing the crystal orientation of the interfacial transition zone, increasing the bond strength of cementitious materials and aggregates, which is one of the reasons for the improvement the mechanical properties of cement-soil[8]
(a)inter-linkages between the soil particles (b)mutually exclusive between the soil particles Fig.3 Interactions schematic of the cement-soil particle Conclusion (1)PAM plays a dual role that promots hydration of cement and improves the interfacial properties of the cement soil particles ,which makes the overall structure of the cement-soil more dense and effectively improve the strength of the cemented soil
[6] Lin Yunteng: Study on the factors affecting the strength of cement-soil (Fujian Construction Science & Technology , China 2011)

Carbon nanotubes created using several synthesis processes have great mechanical and thermal properties.
Multi-walled carbon nanotubes create distinct electrical [9], and mechanical features and mechanical properties [12].
This parameter is also one of the important variables affecting the electric properties of semiconductors.
Tucci, Numerical investigation on the influence factors of the electrical properties of carbon nanotubes-filled composites, Journal of Applied Physics. 113 (2013). https://doi.org/10.1063/1.4811523
Mechanical, Mechanical properties of multi-walled carbon nanotube / epoxy composites To cite this version : HAL Id : hal-02456622, (2020). 10.1016/j.matdes.2010.04.018 [23] Z.

Basic Properties Of Saline Soil Saline soil samples were original saline soil which was taken from Qarham salt lake region.
The basic properties of saline are shown in Table 1,Table 2 and Table 3.
Vertical axis: dry density; Abscissa: Water content (or other factors).
Analysis Of Vibration Compaction Influence Factors Vibration Time.
Vibration acceleration is one of the most important parameters in vibration compaction test , which affecting significantly than other factors; 2) Dry density is similar under the same vibration acceleration, and generally compaction effect is the same.

These almost constant factors also have the same effect on the quality of coke or cause little change, so the factors affecting the quality of coke can be narrowed down to the quality of the coal blending.
Coke mechanical strength, thermal properties are related to the degree of metamorphism.
If volatile and caking index (G or Y) are used to predict the mechanical strength of coke, two mixed coals with same volatile matters and same adhesion coke with same kinds of coal respectively, the quality of the resulting coke will have big difference.
The method also excludes bond index which greatly affects the mechanical strength of coke, sometimes resulting in low predictor accuracy, prediction accuracy will be affected greatly when the coal source changes, greatly reducing forecast accuracy of the coke quality indicators.
Case Study This study uses the foreground program, extracts 99 effective coal blending programs of experimental coke oven from database, in order to compare the accuracy of the prediction, and uses robust regression, neural networks and SVM to predict the quality of coke, during which SVM uses libsvm toolbox, ε-SVR algorithm, kernel function using radial basis integrable functions, take insensitive loss function ε = 0.01, penalty factor C = 10, and others using the default settings. 1/7 of the 99 sample concentration is used as the test set, the rest 6/7 as the training set.

Therefore, domestic and foreign scholars use composite technology to composite materials with different properties to obtain composite materials with excellent properties.
Alumina/aluminum cermet composites have both the good properties of aluminum metal and the excellent properties of alumina ceramics, and have an increasingly important position in modern industrial production [5].
Taking all factors into consideration, it is more appropriate to choose a ball-to-material ratio of 2:1.
Fabrication and properties of Al2O3-Al cermet materials using different raw material. composition parameter [J].
Microstructures and mechanical properties of A356-SiCp/A356 cladding composite materials prepared by vacuum solid-liquid casting [J].

This paper presents a novel and effective characterization method for giant piezoresistive properties of silicon nanowires by using the reference structures.
These experiments need to simultaneously measure the stress of the silicon nanowire and its change rate of resistance, and the experimental apparatus is complicated, and easily affected by many factors.
The simulations show that the stress propagation into the overhang region is significant, which numerically reveals that the undercut inevitably affects the mechanical resonant characteristics of the silicon nanowire. .
Ge, Mechanical properties of silicon nanobeams with an undercut evaluated by combining thedynamic resonance test and finite element analysis, Chin.
Tanaka, Evaluation of size effect on mechanical properties of single crystal silicona by nanoscale bending test using AFM, J.

Introduction Typical metal matrix composites, such as aluminum, magnesium or titanium [1,2], are materials that have many favorable mechanical properties like high strength, hardness, wear resistance and strength to weight ratio.
Experimental design Davim [1] used the method of Taguchi for three factors at three levels.
In this case the cutting time is the most significant cutting parameter affecting the multiple performance characteristics followed by feed.
The results show that cutting time is the major factor affecting the performance (48.37-69.69%), the percent contribution of feed and cutting speed are much lower (9.22-29.12% and 7.5-26.33%), respectively.
The results also show that cutting time is the major factor affecting the multiple cutting performance characteristics (48.37-69.69%).

The formation of the EDZ is affected by various factors, such as stress redistribution and excavation methods.
The Granite specimens for physical properties test is mmmm mm 50160 130 ×× , and specimens have a excavated circular opening of 36mm in diameter.
Their physical and mechanical properties are summarized in Table 1.
Table 1 Physical and mechanical properties of rock samples Specific gravity Apparent porosity(%) P-wave velocity (m/s) S-wave velocity (m/s) Uniaxial compressive strength (Mpa) Young's modulus (Gpa) Poisson's ratio 2.62 0.69 3760 2210 180 32.58 0.24 Noise might easily interfere with AE signals even before they migrate to AE sensors.
It is worthwhile noting that at the beginning, the failure is controlled by the material properties around the excavation; e.g. the seismic source locations are mainly located in the EDZ.