[en] To study the metal/semiconductor interface by means of atomistic simulation, an effective interfacial potential is an important issue. In this work, we use a Chen–Möbius inversion method to study the Ag/GaN(0 0 0 1) interface, and get a concise and general inversion formula, which is used to extract interfacial potentials for the Ag(1 1 1)/GaN(0 0 0 1) interface derived from ab initio adhesive energies. Transferability of those potentials at different environment are checked, and the result show that the inversed potentials are self-consistent and also partially transferable

[en] The matrix elements of the M-3Y force are adopted as the equivalent G-matrix elements and the folded diagram method is used to calculate the spectra of ¹⁸O and ¹⁸F. The results show that the matrix elements of the M-3Y force as the equivalent G-matrix elements are suitable for microscopic calculations of the nuclei in the s-d shell

[en] Misalignment is one of the common welding defects in melt welding, which can lead to local stress in weld and affect the quality of equipment. When the misalignment is large, it must be treated and the necessary evaluation of the treatment results must be made. As the main component of reactor internals, the manufacturing quality of Nuclear Cylinder Reactor Internals is directly related to the safety of NPP's operation. In the manufacturing process of Nuclear Cylinder Reactor Internals of a NPP, the welding has the misalignment which reaches about 10 mm (welding seam is about 52 mm thick), which cannot meet the design requirements and seriously affects the quality of equipment. In order to reduce the local stress concentration and improve the mechanical properties, the dislocation defect of the weld seam was treated technically. The mechanical properties of the treated Nuclear Cylinder Reactor Internals were quantitatively analyzed by using the finite element model, which met the requirements of the original design code. (authors)

[en] The microstructure and texture evolution along the processing was investigated with a particular focus on the secondary recrystallization behavior in a 0.23 mm-thick twin-roll cast grain-oriented electrical steel. A striking feature is that Goss orientation originated during twin-roll casting as a result of shear deformation and it was further enhanced during hot rolling and normalizing. After primary recrystallization annealing, a homogeneous microstructure associated with a sharp γ-fiber texture was produced. During secondary recrystallization annealing, the γ-fiber texture was first strengthened and weakened with increasing temperature prior to the onset of secondary recrystallization. Goss grains always exhibited more 20–45° misoriented boundaries than the matrix. The matrix was quite stable during secondary recrystallization with the aid of dense inhibitors. Finally, a complete secondary recrystallization microstructure consisting of large Goss grains was produced. The grain boundary characteristics distribution indicated that the high energy model was responsible for the abnormal growth of Goss grains under the present conditions. - Highlights: • A 0.23 mm twin-roll cast grain-oriented silicon steel sheet was produced. • Goss orientation originated during twin-roll casting. • Secondary recrystallization behavior was briefly investigated. • γ-fiber texture was enhanced prior to the onset of secondary recrystallization. • A complete secondary recrystallization microstructure was produced.

[en] A 0.1 mm-thick grain-oriented silicon steel sheet was successfully produced using strip casting and three-stage cold rolling method. The microstructure, texture and inhibitor evolution during the processing was briefly analyzed. It was found that Goss texture was absent in the hot rolled sheet because of the lack of shear deformation. After normalizing, a large number of dispersed MnS precipitates with the size range of 15–90 nm were produced. During first cold rolling, dense shear bands were generated in the deformed ferrite grains, resulting in the intense Goss texture after first intermediate annealing. The microstructure was further refined and homogenized during the subsequent cold rolling and annealing processes. After primary recrystallization annealing, a homogeneous microstructure consisting of fine and equiaxed grains was produced while the associated texture was characterized by a strong γ-fiber texture. Finally, a complete secondary recrystallization microstructure consisting of entirely large Goss grains was produced. The magnetic induction B_8 and iron loss P_1_0_/_4_0_0 was 1.79 T and 6.9 W/kg, respectively. - Highlights: • Ultra-thin grain-oriented silicon steel was produced by strip casting process. • Microstructure, texture and inhibitor evolution was briefly investigated. • Goss texture was absent in primary recrystallization annealed sheet. • MnS precipitates with a size range of 15–90 nm formed after normalizing. • A complete secondary recrystallization microstructure was produced.

[en] Highlights: • The charging process of heat pipe receiver is analyzed by using exergy analysis. • The influence of key parameters is discussed by several numerical simulations. • Genetic algorithm is introduced to optimize the values of key parameters. - Abstract: The heat pipe (HP) receiver with integrated latent heat thermal energy storage (LHTES) is one of the key components of solar dynamic space power system (SDPSS). Therefore, thermodynamic analysis and optimization of SDPSS is significant for improving system efficiency and reducing launch cost. In this paper, a two-dimensional physical model was developed. Meanwhile, we studied further energy and exergy characters during charging process in microgravity environment. The equation of exergy efficiency was deduced by analyzing the relationship between heat flux and mass flow of HP. Through discussing the key parameters to exergy efficiency (length of evaporator (L_e), length of phase change material (PCM) (L), and length of condenser with Stirling engine (L_1)), the optimization of parameters—L_e = 0.36 m, L = 0.41 m and L_1 = 0.43 m—were obtained by genetic algorithm when exergy efficiency reaches the maximum value of 0.97585. The results provide theoretical guidance for structure design and applications of SDPSS.

[en] Introduction: Loss of the ability to concentrate "1"3"1I is one of the important causes of radioiodine-refractory disease in papillary thyroid carcinoma (PTC). Recent advantages of serum microRNAs (miRNAs) open a new realm of possibilities for noninvasive diagnosis and prognosis of many cancers. The aim of the current study was to identify differential expression profiling of circulation miRNAs in PTC patients with non-"1"3"1I and "1"3"1I-avid lungs metastases. Methods: The expressions of miRNAs were examined using miRNA microarray chip. The most significantly changed miRNAs from microarray were verified by using qRT-PCR. The potential miRNAs regulating target genes and their preliminary biological functions were forecasted by Bioinformatic analysis. Results: Compared to "1"3"1I-avid lung metastases, 13 kinds of significantly differential serum miRNAs including 5 upregulated miRNAs (miR-1249, miR-106a, miR-503, miR-34c-5p, miR-1281) and 8 downregulated miRNAs (miR-1915, miR-2861, miR-3196, miR-500, miR-572, miR-33b, miR-554, miR-18a) in PTC patients with non-"1"3"1 I-avid lung metastases were identified. Bioinformatic analysis demonstrated that miR-106a was the core miRNA regulating 193 genes in the network. The results of validation confirmed the up-regulation of miR-106a in non-"1"3"1I-avid lungs metastatic PTC patients. Conclusion: Differentially expressed serum miRNA profiles between PTC patients with non-"1"3"1I and "1"3"1I-avid lungs metastases were analyzed. These findings in our present study could represent new clues for the diagnostic and therapeutic strategy in PTC patients with non-"1"3"1I-avid metastatic disease

[en] We studied the diagnostic significance of bone scan in evaluation of bone metastasis by lung cancer, prevalence rate, and the causes of false positive bone scan and soft tissue accumulation of bone seeking agent. This subject include 73 lung cancer patients with bone scan, We analyzed the frequency of the metastasis, its distribution and configuration, and any relationship between bone pain and corresponding region on bone scan. The positive findings of bone scans were compared with simple X-ray film, CT, MRI and other diagnostic modalities. The false positive bone scan and the soft tissue accumulation of bone seeking agent were analyzed. The positive findings on bone scan were noted in 26 cases(36%) and they were coexistent with bone pain in 30%. The correspondence between bone scan and bone X-ray was 38%. False positive bone scans were seen in 12 cases(16%), which include fracture due to thoracotomy and trauma, degenerative bone disease, and bifid rib. Accumulation of bone seeking agent in soft tissue were seen in 13 cases(18%), which included primary tumor, enlarged cervical lymph node, pleural effusion, ascites and pleural thickening. Bone scans should be carefully interpreted in detecting bone metastasis in primary malignancy, because of the 16% false positivity and 18% soft tissue accumulation rate. It is very important to note that the correlation between bone pain and positive findings of bone scans was only 38%

[en] Highlights: • Larger interlayer coupling of bulk SnSe than graphite, MoS₂ and black phosphorus. • Larger interlayer coupling makes it difficult for mechanical exfoliation. We study the inter-layer coupling in bulk tin selenide (SnSe) through density functional theory based calculations. Different approximations for the exchange-correlation functionals and the van der Waals interaction are employed. By performing comparison with graphite, MoS₂ and black phosphorus, we analyze the inter-layer coupling from different points of view, including the binding energy, the low frequency inter-layer optical phonons, and the inter-layer charge transfer. We find that, there is a strong charge transfer between layers of SnSe, resulting in the strongest inter-layer coupling. Moreover, the charge transfer renders the inter-layer coupling in SnSe not of van der Waals type. Mechanical exfoliation has been used to fabricate mono- or few-layer graphene, MoS₂ and black phosphorus. But, our results show that it may be difficult to apply similar technique to SnSe.

[en] We report on MgAl_2O_4 planar waveguides produced using different energies and fluences of C-ion implantation at room temperature. Based on the prism coupling method and end-face coupling measurements, light could propagate in the C-ion-implanted samples. The Raman spectra results indicate that the MgAl_2O_4 crystal lattice was damaged during the multi-energy C implantation process, whereas the absorption spectra were hardly affected by the C-ion implantation in the visible and infrared bands.