Advanced Materials Research Vols. 393-395

Abstract: In order to improve the gaseous and electrochemical hydrogen storage kinetics of the Mg2Ni-type alloys, Ni in the alloy was partially substituted by element Cu. Melt-spinning technology was used for the preparation of the Mg20Ni10-xCux (x = 0, 1, 2, 3, 4) hydrogen storage alloys. The structures of the as-cast and spun alloys are characterized by XRD, SEM and TEM. The gaseous hydrogen absorption and desorption kinetics of the alloys were measured by an automatically controlled Sieverts apparatus. The electrochemical hydrogen storage kinetics of the as-spun alloys is tested by an automatic galvanostatic system. The results show that all the as-spun alloys hold an entire nanocrystalline structure and are free of amorphous phase. The substitution of Cu for Ni, instead of changing the major phase Mg2Ni, leads to a visible refinement of the grains of the as-cast alloys. Furthermore, both the melt spinning treatment and Cu substitution significantly improve the gaseous and electrochemical hydrogen storage kinetics of the alloys.

Abstract: The nanocrystalline and amorphous Mg2Ni-type Mg20-xLaxNi10 (x = 0, 2, 4, 6) hydrogen storage alloys were prepared by melt-spinning technology. The microstructures and hydrogen storage performances of the alloys were characterized. The results show that no amorphous phase is detected in the as-spun La-free alloy, but the as-spun alloys substituted by La hold a major amorphous phase, confirming that the substitution of La for Mg increases the glass forming ability of the Mg2Ni-type alloy. Melt-spinning remarkably improves the hydrogen storage performances of the alloys. When the spinning rate increases from 0 (As-cast was defined as spinning rate of 0 m/s) to 30 m/s, the hydrogen absorption capacity of the alloy (x = 2) at 200°C and 1.5 MPa in 10 min rises from 1.26 to 2.60 wt%, and its electrochemical discharge capacity grows from 197.2 to 406.5 mAh/g at a current density of 20 mA/g.

Abstract: Firstly, the concept of projective nonexpansive mappings is presented in this paper. The approximate solvability of a generalized system for relaxed cocoercive and involving projective nonexpansive mapping nonlinear variational inequalities in Hilbert spaces is studied, based on the convergence of projection methods. The results presented in this paper extend and improve the main results of many authors.

Abstract: Fractal signal feature in breath flow is verified by many articles. So the generate fractal feature have two meanings, one to decrease damage to lung in mechanical ventilation because of natural similar, two to increase similarity in breath simulation used in medical patient simulator. The main feature of fractal signal is self-similar. Some algorithms have been proposed using fractional Brownian motion simulation. In this paper we use Weierstrass function combination to generate fractal signal. The method includes all fractal features and easy to realize in algorithm compared with fractional Brownian motion.

Abstract: The judge of the power that residents travel potentially is a very complex process.The article contains the consumption capacity , the level of consumption, the level of traffic and structural factors such as the residents of four indicators of potential travel force, through the use of Grey comprehensive evaluation method to study the urban agglomeration of the Yangtze River city residents travel the force potential, and its classified analysis, and finally makes some measures and suggestions that upgrade potential residents of the Yangtze River city group travel force .

Abstract: Oligosaccharide as elicitor signal that induced the plant epidermal cells early apoptosis and death events were investigated In this paper.Onion epidermis was stained by typan blue and the rate of cells death is reached to 7.48% treated for 12h with 500ug / ml oligosaccharides, which were stained by fluorescence AO / EB treated with 50 ug/ml oligosaccharides and observed the cell morphology under fluorescence microscope,Some showed early apoptosis, such as the chromatin breakage, nuclear condensation, appearance of apoptotic bodies.

Abstract: Pot-mode cultivation experiments were carried out to study the impacts of nitrogen（urea）fertilization in different level on Cadmium (Cd) accumulation, nitrate contents and nutritive values in Chinese cabbage, The results showed that: at different level of Cd artificial enriched soil, with applied urea increased, the accumulation of Cd in edible part of Chinese cabbage gradually decreased. Nitrate Contents in edible part have a positive correlation with the concentration of Cd in soil and the nitrogen fertilizer applied. In the natural soil (with contaminated Cd in concentration of 0.18 mg/kg), when the urea was fertilized by 255 kg/hm2 to 330 kg/hm2, Cd and nitrate contents of edible parts of cabbage were within the national food security limits, which could guarantee the food security of Chinese cabbage. Increasing nitrogen fertilization in the form of urea has a certain effect on amino acids contents but little effect on soluble sugar contents in Chinese cabbage, when the concentration of urea was 320 kg/hm2, amino acids contents of cabbage reached the highest level of 355 mg/kg1. Increasing nitrogen fertilization could lower down the contents of water-soluble Cd and the available Cd in soil, thereby reduce the absorption of Cd by Chinese cabbage. To a certain extent, increasing nitrogen fertilization could increase the food security of Chinese cabbage.

Abstract: SiAlFe ferroalloy is widely used as a strong de-oxidation compound to substitute pure aluminum in the production of iron and steel. However, its wide application is limited by the frequent occurrence of self-crumbling phenomena and accompanied emissions of a small amount of toxic and explosive gases. This paper determined the corresponding affecting factors by primary investigation of SiAlFe ferroalloy. Then the influence of contents of carbon and phosphorous on the self-crumbling was studied. The results showed that samples containing more phosphorous crumbled more seriously and the content of phosphorous was suggested to be less than 0.03 wt %. The change of content of carbon did not affect the crumbling obviously, ranging from 0.1~0.7 wt %.

Abstract: Social research is a collection of methods people use systematically to produce knowledge. This paper introduces two main approaches to collect and analyze data. They are quantitative approach and qualitative approach. The advantages and disadvantages of different approaches are also explained in this paper.

Abstract: Lactic acid bacteria commonly used in fermented meat products, dairy products and smoked products such as pickled food industry. They can make the products have a special flavor and color, inhibit the growth of pathogenic bacteria, and reduce the nitrite content of products, improve food security. 12 strains of lactic acid bacteria were isolated from the salted fish. Some of their biochemical characteristics were studied and compared, as well as their abilities on the tolerance and degradation of nitrite. 3 strains named b2、j2、j5 were approved to degrade nitrite quickly with good biochemical characteristics. After amplification and sequencing of 16S rDNA gene, the isolated strains were identified by sequence homology as Lactobacillus plantarum, Leuconostoc mesenteroides and Pediococcus pentosaceus. Strainb2, j2 and j5could degrade 96.2%, 85.6%, 91.2%.