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Cubic-shaped Nano-MgO Powder and its Infrared Absorption Properties Yimin Zhu 1,a, Yuexin Han 1,b Guoliang Liu2,c 1 School of Resources and Civil Engineering, 2 School of Science Northeastern University, Shenyang, Liaoning 110004, China a zhuyimin@mail.neu.edu.cn b hanyuexin@mail.neu.edu.cn c liuguoliang024@yahoo.com.cn Keywords: Cubic nano-MgO, shape control, infrared absorption properties Abstract.
The main effect factors on the size and shape of nano-MgO powder such as mechanical stirring rate, organic reagent, and calcinations of the process were investigated.
Several factors have been affected on conglobation of the powder such as precipitation reaction temperature, reaction time, mechanical stirring rate, and organic additives [8-10].
Summary (1) The shape and size of MgO powder are affected by mechanical stirring rate, calcination time, and species and dosages of organic additives; And conglobation of the powder is also affected by these factors
Preparation of Nano-MgO and Investigation of its Infrared Absorption Properties[J].

This study aims to evaluate the influence of solvent acids and glycerol as plasticizer on the antimicrobial and physical properties of chitosan films.
Concerning mechanical properties, chitosan film prepared with acetic acid exhibited the highest tensile strength and the lowest percentage elongation.
The main goal was to produce chitosan films with a good antimicrobial properties, lower water vapour transmission rate, and good elasticity.
Study of the combined effect of both clay and glycerol plasticizer on the properties of chitosan films.
In vitro antibacterial and antioxidant properties of chitosan edible films incorporated with Thymus moroderi or Thymus piperella essential oils.

Effects of cold rolling factors and temperatures and annealing times on microstructure, hardness and tensile properties have been studied.
This study is intended to refine austenite grains to nano-scale and improve the mechanical properties of 301 stainless steel.
Mechanical properties of the alloy have been studied at various conditions.
Results and discussion The microstructure and mechanical properties of 301 austenitic stainless steel in solution anneal state is studied first.
Conclusions 1- Using 70 and 90 percent cold work and annealing, the reversed austenite grain size was reduced to less than 100 nanometers. 2- In 301 austenitic stainless steel, a 90 percent cold work and annealing in various temperatures affects the nano-scale austentite grains more significantly than a 70 percent cold work. 3- The mechanical properties of the steel under study is improved after cold work and anneal. 4- The influence of temperature parameter on grain size and improvement of mechanical properties is more pronounced than that of the time parameter.

The results of water retention value (WRV) and the characteristic parameter of the fibrillation degree revealed that the ranking of factors affecting the fibrillation degree of fibers was NaOH concentration > homogeneous time > temperature > bath ratio, using the extreme difference analysis and variance analysis methods.
It is a naturally biodegradable and environmentally friendly fiber with excellent properties.
Therefore, the fibrillation tendency of Lyocell fiber is promising to be used to reinforce the polymer and fabricate renewable and biodegradable composites with improved mechanical properties.
The results of WRV reveal that the ranking of factors which affect fibrillation degree of fibers is NaOH concentration > homogeneous time > temperature> bath ratio, using the extreme difference analysis and variance analysis methods.
Physical and mechanical properties of polyvinyl alcohol and polypropylene composite materials reinforced with fibril aggregates isolated from regenerated cellulose fibers.

The study of the mechanical properties of BFRPC materials should be studied furtherly. 2.
Experimental Study on Mechanical Properties of BFRPC Materials 2.1.
The mechanical properties of BFRPC must be related to the internal microstructure of materials, in addition to the mechanical properties of fiber and concrete materials.
And the microstructural defects would be increased in BFRPC, the mechanical properties would be affected. 4.
Experiment and research on basic mechanical properties of reactive powder concrete [D].

Study on Electrical Resistivity Characteristics and Influencing Factors of Soil-stone Composite Medium Wang Kui1,a, Zhao Mingjie1,b 1Key Laboratory of the Ministry of Education on Hydraulic & Water Engineering,Chongqing Jiaotong University,Chong Qing,China,400074 aanhuiwk@163.com, b285580984@qq.com Keywords: Hydraulic engineering, soil-stone composite medium, electrical resistivity Abstract: At present, there are only a few theoretical models for researching the electrical resistivity characteristics of multi-phase soil-stone composite medium, as it could be influenced by so many factors.
In line with the results, when the composition of particles are not changed, in the order of sensitive, the main factors that affect electrical resistivity characteristics are water content, porosity, and soil-rock ratio.
However, soil-stone composite medium is a typical multi-phase medium which is composed of soil particles, stone particles, the pores among particles, and the gas and water in the pores etc., its gradation changes a lot, the water content is extremely uneven, and the particle diameter, rock type, stone content, water content, and degree of compaction have huge impacts on the engineering properties.
Its physical and mechanical properties are essentially different from pure soil medium and rock medium, so using the resistivity theory of pure soil medium or pure rock medium couldn’t evaluate the structure and physical and mechanical parameters of soil-stone composite medium accurately.
The main conclusions are as follows: (1) When the composition of particles is constant, in the order of sensitive, the main factors affecting the resistivity characteristics are water content, porosity and soil-stone ratio

Scanning electron microscopy was used to elucidate parameters affecting on microstructure and wear properties of products.
This work indicates that epoxy shows good reinforcement characteristics as it improves the sliding wear resistance of the carbon matrix and that factors like carbonization temperature, sliding distance and normal load are the important factors affecting the wear behaviors.
The main purpose of using reinforcement can be considered to improve the mechanical, thermal or tribological properties and to reduce the cost of the final product as Reinforcements like ceramic or metal is being used in carbon composites to improve the wood-based mechanical and surface properties remarkably [14].
Mechanical property of porous carbon in different temperatures.
Prediction analysis of wear test shows that the carbonization temperature is the most significant factor among three factors and subsequently, sliding distance is the second and normal load is the third affecting factors of test.

Forecasting principles of coal and gas outburst Coal and gas outburst is a dynamical phenomenon which is affected synthetically by geostress, gas, physical and mechanical properties of coal.
During the process of outburst, both of geostress and gas pressure are its motive power, but physical and mechanical properties of coal is the obstructive factor[7].
Coal and gas outburst is a complicated and dynamical phenomenon, caused by geostress, gas as well as physical and mechanical properties of coal, each prodictive index could reflect the change law of one or more factors, as shown in Table 1.
For the prediction of coal and gas outburst, physical and mechanical properties of coal usually means the properties of adsorption-desorption, most of the forecasting indexes in the “Rules of Preventing Coal and Gas Outburst” are related to the properties of adsorption-desorption, which could well reflect the factor of physical and mechanical properties of coal.
Coal and gas outburst is a complicated and dynamical phenomenon, caused by geostress, gas as well as physical and mechanical properties of coal, each prodictive index could reflect the change law of one or more factors.

One of the critical physical and mechanical properties of metals and alloys is the suitability for abrasive machining.
Machinability by abrasive tools depends on the machining performance affected both by the blank material properties and various processing factors.
Introduction One of the critical physical and mechanical properties of metals and alloys is the suitability for abrasive machining.
According to the analysis of the results obtained in the course of the studies, in the proposed interpretation material machinability by abrasive tools depends on the machining capacity affected both by the blank material properties and various process-related factors.
Paper [1] describes an attempt to associate machinability of metals with their physical and mechanical properties.

The mechanical behaviour of the as-forged bulk materials was found to be dependent on several factors such as initial powders used, green density of the powder compact, forging parameters used during forging.
The mechanical behaviour of the as-forged samples was dependent on several factors.
In the case of Ti-6Al-4V alloy the oxygen content in the initial powders affected the mechanical behavior.
Thirdly the forging parameters effected the densification, which inturn affected the mechanical properties.
On the other hand the room temperature mechanical properties Ti-47Al-2Cr alloy were far below than that reported from other works [9] due to the reasons mentioned above.