The electrochemical properties and kinetics of chromium(III) in molten LiF-NaF-KF (46.5-11.5-42 mol %, FLiNaK) eutectic at 700 °C were studied by using cyclic voltammetry (CV) and square wave voltammetry (SWV). CV and SWV results indicate two steps of electron exchange process, corresponding to the reduction of Cr(III) to Cr(II) and Cr(II) to Cr(0) and the oxidation of Cr(0) to Cr(II) and Cr(II) to Cr(III). The redox of Cr(III)/Cr(II) is reversible, while the redox of Cr(II)/Cr(0) is quasi-reversible in the range of the scan rate investigated in this study. The reduction processes of Cr(III) to Cr(II) and Cr(II) to Cr(0) are diffusion-controlled according to the linear relationship between i pc and the square root of scan rate (below 400 mV/s). The diffusion coefficients of Cr(III) and Cr(II) were calculated to be (9.56±0.57)×10 -7 cm 2 ·s -1 and (3.68±0.09)×10 -6 cm 2 ·s -1 at 700 °C, respectively. Also, the apparent standard potentials of Cr(III)/Cr(II) and Cr(II)/Cr(0) were estimated to be -0.215 V (vs. Pt) and -0.152 V (vs. Pt).

This paper investigated several influencing factors for the preparation of solid alcohol, including the amount of raw materials used such as stearic acid and copper nitrate and so on, and the temperature, etc. Through single factor experiments, the main influence factors of preparing solid alcohol were determined. And, on this basis, in view of three remarkable influence factors: the stearic acid amount used, the copper nitrate amount used and the temperature, the orthogonal experiment was carried out. Finally, the optimal preparation conditions were determined as follows: 25ml industrial alcohol, 1.3g stearic acid, 1.2ml 10% copper nitrate solution, at 75°C, pH 8, the cooling way is gradual cooling with no refluxing.

With the rapid spread of web application, the search engine based on personalized services becomes more important in the society. The paper proposes an approach to design and implement a personalized search engine based on Heritrix and Lucene. In particular, the design a web crawler of mobile information with URL hashing algorithm, achieving the multithread and efficient web crawl. Experimental results show the efficient performance. ,1752'8&7,21 $FFRUGLQJ WR W KH FKDUDFWHULVWLFV RI WKH XV HU WR UH DUUDQJH RUJDQL]H LQIRUPDWLRQ SHUVRQDOL]HG VHDUFK WKURXJK WKH DQDO\VLV RI WKH XVHU ¶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

According to the development of landscape digitization and the actual market demand, a digital landscape system based on intelligent sensor network is designed and implemented. The system consists of two parts: sensor node and display terminal, forming a star intelligent sensor network. Sensor node measurement is sent to display control terminal through intelligent sensor network. The display control terminal serves as the aggregation node. Based on geometry transformation, free form, and bionics, the method of constructing complex surface and the method strategy of optimizing complex surface are put forward from geometry and bionics theory. Then, the material types and construction methods of landscape composite surface are discussed and studied. According to the process and project of site cognition and landscape planning and design, six special models are established: ecological sensitivity evaluation model, construction suitability evaluation model, project site selection model, road line selection model, quasinatural waterscape construction model, and vertical design model. According to the characteristics of each landscape planning and design project, the logic generation and parameter composition of the model are discussed, and the application of the model is empirically studied and discussed based on actual cases.

Pristine and yttrium-doped LiNi0.5-x Y x Mn1.5O4 spinel powders (x=0, 0.005, 0.01, 0.02, 0.04) were synthesized by a facile solid-state method. The effect of yttrium doping content on the electrochemical properties of LiNi0.5-x Y x Mn1.5O4 was investigated by using half-cells paired with lithium metal and full-cells paired with graphite. XRD and FT-IR analysis shows that the cation disordering degree (Mn3+ content) first increase (x≤0.02) and then decrease with Y doping content and the Y doping can effectively inhibit the formation of Li x Ni1-x O impurity phase. Electrochemical results show that in half-cells, appropriate Y doping (x=0.01) exhibits optimal rate capability and cycling stability of LiNi0.5Mn1.5O4 cathode material, due to higher phase purity, enlarged lattice parameter, higher disordering degree, higher structural stability by introducing Y-O bond, lower charge transfer resistance and higher lithium ion diffusion coefficient, although the 0.2 C discharge capacity is slightly lower than pristine LiNi0.5Mn1.5O4. However, in full-cells, the yttrium doping effect on the improvement of battery performance is not obvious as half-cells.