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To reduce the landing risk of carrier-based aircraft during wave-off maneuvering, this paper introduced an improved design manner of wave-off risk area. Compositing traditional wave-off criterion, a generalized design manner of safe wave-off area is presented. The model simulation results indicate the better performance of the design one and the influence of safe wave-off area with velocity and interference rate of descend had been researched.

Objective To implant 80 mm-long artificial esophagi constructed of biomaterial in dogs, observe the perioperative survival rates and the incidence of postoperative complications, and study the mechanisms of postoperative healing. Methods Specimens of the implanted esophagus, the “neo-esophagi”, were taken for histopathologic study 1, 3, 6, 12, 24 months after operation. Results The incidence of anastomotic leakage after the artificial esophagus implantation was 3.33%. The perioperative survival rate was 96.67%. The incidence of postoperative stenosis in the “neo-esophagi” was 81.48%; the stenoses were treated by expanding with esophagoscopy and implanting a stent. Epithelization of the mucosa in the “neo-esophagi” was completed in 3 to 6 months after surgery. Structures such as submucosal muscle layers, mucous glands, nerve fibers, capillaries, etc . were regenerated after 12 months, and then reconstruction of the fibrous connective tissue layer was completed. Conclusion Implanting a biomaterial artificial esophagus accomplishes safe reconstruction of defects in the esophagus. Advanced cellular structure of “neo-esophagus” can be regenerated after 1 year. Postoperative stenosis, which is related to hyperplasia and retraction of scar tissue, is still the most common complications which limiting the clinical application of the artificial esophagus.

Little reports showed cyclin D1 changes in esophageal cancer from southern China. In this study, we detected cyclin D1 expression in esophageal carcinomas from southern China 61% and 35% cases showed increased expression of cyclin D1 in esophageal carcinomas and the adjacent epithelia, respectively. Significant difference for cyclin D1 expression was found between esophageal carcinomas and the adjacent epithelia. Comparing cyclin D1 expression in the carcinomas at different stages, we found significant alterations. The results suggested that cyclin D1 was involved in the earlier event and accumulated as the cancer evolved to a later stage in some esophageal carcinomas.

In electronegative or reactive plasmas, the problems such as negative ions floating near the sheath edge or deposition contamination cause more challenges for the diagnosis of conventional Langmiur probe. The electron density measured by microwave resonance probe is only a function of dielectric constant of plasma, there should be less or no influence of electronegative or reactive plasma. In this paper, a floating microwave resonator probe is proposed to measure electron density of capacitively coupled Ar plasma. A comparison with Langmuir double probe measurement shows that microwave resonance probe is applicable for measuring low electron density of plasma. The experimental results from the measurements of Ar/SF6 and SF6/O2 capacitively discharge driven by 40.68 MHz show that addition of SF6 into Ar plasma reduces the electron density significantly, with further increase of SF6 flow rate, electron density shows a gradual decrease. While for the addition ofO2 into SF6 discharge, the electron density continuously decreases with the increase ofO2 flow rate. Additionally, the electron density does not vary with lower frequency input power for SF6/O2 capacitively discharge driven by 40.68 MHz/13.56 MHz. The preliminary interpretations of the above experimental phenomena are presented.