Structures and properties of Sc and Y metals

Abstract

ld~lt~: "llaeeleetmniestmcturesofpureSeandY rnetals with hep structure have been determined by one-atom (OA) ~heory, which are [Ar](3d~)"~" (4s~)o'~°(4sf) °'~' and [Kr] (4d.)"~° (5s~)°'947° (Sst) °'~°° • According to their dectmnic structure, their potential cm'ves, cohesive energies, lattice constants, elasticity and the tempermawe dependence of linear thermal expansion coefficients have been calculated. The ehctnmie structures and characteristic properties of these meta/s wi& bcc stng4ures and primary liquids have also been studied, which has supplied the ~ parameters and property parameters of Sc and Y with diffet~mt crystal structures and also supplied a series of c~aplete data for the theoretical design of Sc and Y based materials.

Quantitative analysis and chromatographic fingerprinting for the quality evaluation of Forsythia suspensa extract by HPLC coupled with photodiode array detector

“…In the trend of returning to nature, more and more people like using plant extracts due to their good safety, low toxicity and easy taking, so gradually the quality control of plant extracts is also becoming a research hotspot [12]. However, previous studies mainly focused on the quantitative determination of single or a few chemical constituents in F. suspensa by TLC [13,14], HPCE [15,16] and HPLC [17][18][19][20]. TLC is economical and easy to do; however, it provides limited information and is very difficult to respond to the complex system with many kinds of chemical compositions [21].…”

Electronic structure and electrocatalytic activity of cerium-doped tantalum oxide

“…This might be due to the special f-electron structure of cerium [30]. Doping cerium resulted in an increase in the electrochemical activity number on the surface of Ta 2 O 5 and an enlargement in the effective specific surface of the cerium-Ta 2 O 5 catalyst [31]. On the other hand, from the DOS results, it was established that the transfer of CB electrons was easy when these electrons absorbed energy.…”

Simulation study of TCP performance under IPv4 within integrated wired and wireless networks

“…With growing number of wireless networks and devices, it is important to investigate TCP performance over wired and wireless networks. Much effort has been made to study the TCP performance by simulation [3]- [23]. [13] provided simulation analysis of TCP performance on IEEE 802.…”

“…[16] has provided an experimental result for TCP performance over live wireless network. There are many other research along this line, [17]- [23], to name just a few. Though TCP performance over wireless links has been extensively investigated, there are very few reports that have included the Mobile IP protocol [4][8] [9][20] [23].…”

“…There are many other research along this line, [17]- [23], to name just a few. Though TCP performance over wireless links has been extensively investigated, there are very few reports that have included the Mobile IP protocol [4][8] [9][20] [23]. Another interesting point is that many publications have used the most popular network simulator Z. Zheng…”