[en] Many time evolution problems have the so-called strong regularization effect, that is, with any irregular initial data, as soon as becomes greater than 0, the solution becomes C^∞ for both spacial and temporal variables. This paper studies 1 x 1 dimension integrable systems for such regularizing effect. In the work by Sachs, Kappler [S][K], (see also earlier works [KFJ] and [Ka]), strong regularizing effect is proved for KdV with rapidly decaying irregular initial data, using the inverse scattering method. There are two equivalent Gel'fand-Levitan-Marchenko (GLM) equations associated to an inverse scattering problem, one is normalized at x = ∞ and another at x = ∞. The method of [S][K] relies on the fact that the KdV waves propagate only in one direction and therefore one of the two GLM equations remains normalized and can be differentiated infinitely many times. 15 refs

[en] For the direct-inverse scattering transform of the time dependent Schroedinger equation, rigorous results are obtained based on an operator-triangular-factorization approach. By viewing the equation as a first order operator equation, similar results as for the first order n x n matrix system are obtained. The nonlocal Riemann-Hilbert problem for inverse scattering is shown to have solution. (orig.)

[en] The author describes a software joint which connects the most important and advanced physics software with and detector software and its application

[en] Highlights: •miR-340 is downregulated in OS cell lines and tissues. •miR-340 suppresses OS cell proliferation, migration and invasion. •miR-340 suppresses tumor growth and metastasis of OS cells in nude mice. •ROCK1 is a target gene of miR-340. •ROCK1 is involved in miR-340-induced suppression of OS cell proliferation, migration and invasion. -- Abstract: MicroRNAs (miRNAs) play key roles in cancer development and progression. In the present study, we investigated the role of miR-340 in the progression and metastasis of osteosarcoma (OS). Our results showed that miR-340 was frequently downregulated in OS tumors and cell lines. Overexpression of miR-340 in OS cell lines significantly inhibited cell proliferation, migration, and invasion in vitro, and tumor growth and metastasis in a xenograft mouse model. ROCK1 was identified as a target of miR-340, and ectopic expression of miR-340 downregulated ROCK1 by direct binding to its 3′ untranslated region. siRNA-mediated silencing of ROCK1 phenocopied the effects of miR-340 overexpression, whereas restoration of ROCK1 in miR-340-overexpressing OS cells reversed the suppressive effects of miR-340. Together, these findings indicate that miR-340 acts as a tumor suppressor and its downregulation in tumor tissues may contribute to the progression and metastasis of OS through a mechanism involving ROCK1, suggesting miR-340 as a potential new diagnostic and therapeutic target for the treatment of OS

[en] The boron dilution transient of reactor is simulated using CFX10.0 in this paper. The boron concentration distributions and temperature distributions are obtained for the reactor. The results show that, as temperature of the reactor increases, the resistances fall down and clear water can reach the reactor core quickly, the mixing time between the clear water and borated water reduces, and the mixing effect weakens, with a lower boron concentration at the centre than other parts of the reactor core. (authors)

[en] To further improve the reliability on the quality of fuel element end plug weld , establishing ultrasonic testing methods to achieve 100% inspection in the side area of welded joint. By drawing analysis, formed angle of weld defects, morphology and depth of required to detect defects on the elements were analyzed and studied. the tilt detection method of flooding high-frequency ultrasonic shear wave is determined. using a variety of frequencies, the probe of a variety of different curvature radii conducted experimental research methods to determine the location of the point of incidence of the probe, the technical parameters, the tilt angle. Through homemade artificial defects testing and verification of the anatomical defects, to achieve all the homemade welding defects detection and standard defects detection, the minimum diameter of standard defect detected is 0.2 x 0.2. Research results show that the established ultrasound method can detect to Internal defects of welded joint in end plug, the technical index requirements of the relevant foreign is reached

[en] In this paper, we report the controlled-synthesis of PtNi nanoparticles through galvanic displacement reaction and chemical reduction. The size, composition and morphology of the products are characterized by transmission electron microscopy (TEM), powder X-ray diffraction (XRD), energy dispersed X-ray spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS) analyses. The structure and composition of the PtNi nanoparticles can be controlled by adjusting the synthetic conditions. The possible formation mechanism is obtained from the academic analysis and experimental studies. The results of the magnetic measurement illustrate that the PtNi nanoparticles show a superparamagnetic behavior with a blocking temperature (T_B) about 8.0 K. - Highlights: • Highly monodispersed PtNi nanoparticles were synthesized by galvanic displacement reaction. • The formation of Pt nanocrystals was the foremost step because of its self-catalysis effect. • The PtNi nanoparticles show a superparamagnetic behavior with a T_B about 8.0 K

[en] High temperature reactor is one of the core technologies of Generation IV reactors for its inherent safety features, economical competitiveness and broad application prospects. To ensure nuclear safety, ECRO has implemented strict and effective inspection over HTR-PM during the construction. This paper gives a brief introduction on the technical features of HTR-PM, and analyses the keystone and difficulties of its construction. Then a summary of inspection activities is given, which can be beneficial for the inspection over subsequent HTR reactors. (authors)

[en] Steam dump component is a crucial part of core melt coolant system of AP1000 units. This paper mainly describes the stuck issue and the corresponding solutions of this component during its function verification. Meanwhile, some summaries and discussions are proposed in this paper based on the AP1000 on-site supervision. (authors)

[en] Graphical abstract: - Highlights: • Mixed P25 nanoparticles and large rutile particles were employed to form a top scattering layer. • The top scattering layer exhibits superior light scattering effect. • The bottom nanocrystalline TiO_2 layer can make good use of the back-scattered light. • Bilayer TiO_2 photoanode shows faster interfacial electron transfer and slower charge recombination process. • Bilayer photoanode enhances the DSSC efficiency by a factor of 25%. - Abstract: Herein, we report a bilayer TiO_2 photoanode composed of nanocrystalline TiO_2 (NCT) bottom layer and mixed P25 nanoparticles and large rutile particles (PR) top scattering layer. The present structure performs well in solar light harvesting which is mainly attributed to the fact that the top scattering layer exhibits superior light scattering effect and meanwhile the NCT bottom layer with large dye-loading capacity can make better use of the back-scattered light. Moreover, electrochemical impedance spectroscopy and open circuit voltage decay measurements demonstrate that DSSC based on bilayer photoanode shows faster interfacial electron transfer and slower charge recombination process than that based on NCT monolayer photoanode. These advantages render the DSSCs based on NCT-PR bilayer photoanode exhibiting superior performance under AM1.5G simulated solar irradiation. As an example, by tuning mass ratio between P25 nanoparticles and large rutile particles in the top scattering layer, the DSSC based on NCT-PR bilayer photoanode exhibits an optimum solar energy conversion efficiency of 9.0%, which is about 1.25 times higher than that of monolayer NCT device (7.2%) with the same film thickness