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[en] Constantly advancing market-led interest rate led to the financial institution traditional business profit margins shrinking. Finance companies which are financial institutions within the enterprise groups withstand greater impact than commercial banks. Therefore, the financial company's top priority is to expand the intermediary business, including settlement and sales, and to develop new profit growth point. This paper compares the existing domestic and foreign currency clearing modes and their efficiencies, combines with the company's business situation, and makes corresponding analysis of the prior preparations and considerations of conducting settlement and sales. (author)
[en] Highlights: • Using microcapsule slurry as engine cooling media was presented. • A novel composite microcapsule was prepared by inlaying graphene into shell. • Thermal conductivity of composite microcapsules was improved greatly. • All slurries can save pumping consumption compared to pure water as coolants. - Abstract: Due to the high heat carrier density, using microcapsule phase change material (MPCM) slurry as engine coolant instead of water was presented. To match the engine cooling temperature, a novel microcapsule was prepared based on phase change paraffin with phase transition temperature range of 78–85 °C as core and urea-formaldehyde as resin shell. To improve thermal conductivity of the microcapsule, a composite microcapsule phase change material (CMPCM) was also prepared by inlaying graphene into urea-formaldehyde resin shell. By dispersing microcapsule in water, microcapsule slurries were prepared. To analyze the feasibility in engine cooling system, an experimental study on the flow resistance characteristics of microcapsule slurries in a circular tube was conducted. The pressure drops of slurries for turbulent flow were measured and the effects of such facts as the concentration and flow velocity were discussed. According to the pressure characteristic and latent heat of the slurry, the pumping consumption rates of slurries to water under a given heat transportation quantity can be obtained. The results show that mass flow rate and pumping consumption of slurries decrease greatly compared with water, which indicate that the microcapsule slurries are promising media for engine cooling system.
[en] Electrophosphorescence from light-emitting diodes (LEDs) based on highly efficient and deep red ruthenium(II) complex Ru(dpp)2(dctbpy)(PF6)2 (dpp = 4,7-diphenyl-1,10-phenanthroline, dctbpy = 4,4'-dibutyl ester-2,2'-bipyridine)-doped wide-band-gap semiconductive polymers poly(vinylcarbazole) (PVK) and 2-biphenyl-4-yl-5-(4-ter-butyl-phenyl)-(1,3,4)oxadiazole (PBD) are investigated. A device with structure ITO/PEDOT/PVK:PBD:Ru(dpp)2(dctbpy) (PF6)2/TPBi/LiF/Al (ITO = indium tin oxide) reaches a luminous efficiency of 16.7 cd A−1 and an external quantum efficiency of 15.3% as well as the maximum brightness of 6776 cd m−2. The device emits pure red light efficiently and stably for the emission maximum of 628 nm and the Commission Internationale de l'Eclairage (CIE) coordinates of (0.63, 0.34) as driving voltage increases. To the best of our knowledge, the electroluminescent performance of this device is the highest among reported so far for Ru(II)-doped red LEDs. We attribute the great performance to the good hole blocking and electron transporting abilities of TPBi as well as the high efficiency of dopant Ru(II) complex. (rapid communication)
[en] The defects and electronic momenta in graphite and nanocrystalline carbon have been studied by positron annihilation techniques. The results show that the concentration and open volume of defects in nanocrystalline carbon are higher/larger than that in graphite. Two kinds of microdefects were found in the nanocrystalline carbon: free volume (with a size of smaller than that of a monovacancy) and microvoids (with a size of about ten monovacancies). The anisotropic distribution of electronic momentum was found in single crystalline graphite; the momentum of free electron shows a maximum value in  direction, and decreases with the increase of the angle deviation from  direction and then reaches a minimum value in the direction perpendicular to . However, this phenomenon was not found in nanocrystalline carbon since the distribution of electronic momentum is isotropic. (authors)
[en] Three new polyoxometalates X7[PMo8O30] (X=Na+, 1; K+, 2; NH4+, 3) have been synthesized with the classical Keggin and/or Dawson heteropolymolybdophosphates and PCl5 in acetonitrile-water solutions via hydrothermal treatment. The three compounds were characterized by different analyses including IR, 31P NMR spectroscopy, elemental analysis, electrochemistry, thermogravimetric analysis (TGA) and powder X-ray diffraction (XRD). Single crystal X-ray analyses were carried out on Na7[PMo8O30] (1) and (NH4)7[PMo8O30] (3). Compound 1 and 3 crystallize in the orthorhombic system. The structure of compound 2 was confirmed by the IR spectra and powder XRD. All the three compounds contain the same octamolybdophosphate polyoxoanion [PMo8O30]7-, which consists of two Mo4O15 moieties linked by one central PO4 tetrahedron, leading to a remarkable sandglass-like structure. - Graphical Abstract: with the Keggin and/or Dawson heteropolymolybdophosphates and PCl5 in acetonitrile-water solutions via hydrothermal treatment, three new polyoxometalates X7[PMo8O30] (X=Na+, 1; K+, 2; NH4+, 3) have been synthesized and characterized. Single crystal X-ray analyses were carried out on Na7[PMo8O30] (1) and (NH4)7[PMo8O30] (3). All the three compounds contain the new sandglass-like structure [PMo8O30]7-
[en] Highlights: • The complex multilayer structure can be induced by irradiation. • Phase constitution with increased fluence evolved as follows: B19’ → (B19’ + B2 + Ti2Ni) → (B2 + Ti2Ni + TiH2). • The transformation temperature decreases remarkablly with the increasing of irradiation fluence. • The strain recovery characteristics deteriorated significantly with the irradiation fluence increasing. - Abstract: Herein, we investigate the effects of proton irradiation on the structure and shape recovery characteristics of a NiTi alloy and provide a mechanistic explanation of the observed phenomena. Detailed analysis revealed that bombardment with 3 MeV protons induced the formation of a complex multilayer structure comprising TiH2, Ti2Ni, austenite and austenite-martensite layers along the irradiation direction with increasing distance and the origin of the above structure was shown to be closely related to the preferential sputtering effect and irradiation-induced segregation. Finally, the shape recovery characteristics significantly deteriorated with increasing irradiation fluence, since the multilayer structure hindered the martensitic transformation.
[en] Highlights: • Element distribution and surface microstructure of NiTi alloy under proton irradiation were investigated. • The ratio of Ti/Ni is not equiatomic on the near-surface of NiTi alloy after proton irradiation. • The spatial structure of the proton irradiated NiTi alloy consisted of a clear multilayer structure. • The multilayer including B2 phase, Ti2Ni phase and TiH2 phase were induced owing to proton irradiation. • The multilayer had an obvious effect on the mechanical properties. - Abstract: The element distribution and surface microstructure in NiTi shape memory alloys exposed to 3 MeV proton irradiation were investigated. Redistribution of the alloying element and a clearly visible multilayer structure consisting of three layers were observed on the surface of NiTi shape memory alloys after proton irradiation. The outermost layer consists primarily of a columnar-like TiH2 phase with a tetragonal structure, and the internal layer is primarily comprised of a bcc austenite phase. In addition, the Ti2Ni phase, with an fcc structure, serves as the transition layer between the outermost and internal layer. The above-mentioned phenomenon is attributed to the preferential sputtering of high energy protons and segregation induced by irradiation.