Background:The ultimate goal of facelift is to lift the sagging soft tissue as much as possible, so as to restore them to the original anatomical position for facial rejuvenation.Objective: In our High-SMAS facelift, the SMAS-platysma flap were tighten strongly, so as to obtain full and youthful facial morphologic characteristics. In addition, the effectiveness of high-SMAS was evaluated in this paper. Methods:A total of 86 cases of SMAS face lift were performed in 22 months from January 2015 to November 2016. High SMAS technique was applied in 39 cases of them. All the 39 patients were female averaged 44 (29-65) years old. Postoperative follow-up wascarried out in 18 cases for an average of 13 months (4-22 months). After the SMAS-platysma flap was dissected in the lower face and neck，the key point of operating is focus on：The middle temporal fascia and superficial temporal fascia flap was dissected carefully. Break off the ligaments medial to the zygomatic arch and on the malar process exactly, and pay attention to protect the facial nerve. So that the high-SMAS and even higher-SMAS flap can be dissected. Results:In all the 18 cases followed up, most (11/18) obtained a clear mandibular margin after operation and scored even full mark.Perfect nasolabial fold improvement was achieved in few (7/18). In terms of Ogee curve evaluation, most (15/18) made it to the level of "acceptable", which was shared by the evaluation of lower eyelid shortening effects (13/18). Very satisfied indicators as follow: the obtuse jowl line becomes clear, midface "ogee curve" is vary from linear to curves, and the nasolabial sulcus have been improved. Conclusion:High-SMAS Facelift is one of the most effective rhytidectomy, the most prominent parts of its effect including the improvement of midface and jowl line contour. Level of Evidence: IV

The present thesis made a research to evaluate fatigue crack growth rate subjecting to corrosion and cyclic fatigue loading, with the effect of load frequency on fatigue taken into account. A modified Paris’ law based model is proposed. An exponential modified expression of proportional parameter account for fatigue frequency is proposed based on the obvious fact that low frequency loading will lead to long fatigue life, thus prolong interaction time between corrosion media and specimen which will favor for crack propagation. Loading frequency higher enough will shorten that time, thus influence of corrosion will be significantly weaken, close to pure mechanical fatigue. Crack growth rate prediction from proposed formula is proved to be in good agreement with experimental results for steadily extended corrosion fatigue crack.

Based on the basic structure of deceleration sled, the paper established an simplified finite element model by Ansys/Ls-Dyna software, which is verified by GB 13057-2014 passenger seat simulating impact test and GB 27887-2011 child seat simulating impact test. Then, how the sled mass and the layout of the steel bars influence the decelerating curves are being discussed through the FE calculation: when the layout of the steel bars and the initial velocity of the sled remain unchanged, the heavier the sled is, the longer the deceleration curve continued; when the sled mass and the initial velocity remain unchanged, the more centrally the steel bars are being placed, the larger the peak value of the deceleration curve is. What’s more, the finite element model in this paper can provide some guidance in the daily tests.

This paper introduces the composition, function, system construction and construction technology of ACF Inorganic Fibers Wool Board External Thermal Insulation System (Abbreviation: ACF System), and also evaluated its properties. Results showed that all the performance indexes of this system meet the requirement of company standard. The good effect has been achieved in its application in energy-efficient retrofit in existing building of Xicheng District, Beijing. It demonstrates that the ACF System not only satisfies the building energy efficiency requirements but also owns a good fire resistance property as a new building fire-resistant insulation system. It possesses a prospect market and extending significance.

The intermittent pumping technique is often used in the low-permeability reservoir with poor deliverability. In this case, bottom-hole pressure fluctuates periodically and welltest theory in the situation of continuous pumping production is not suitable for intermittent pumping case, due to neglecting pressure buildup per cycle. So it is now necessary to study bottom hole pressure variation regularity of an intermittent pumping well and its welltest interpretation method. First, considering threshold pressure gradient and effects of wellbore storage and skin, mathematical models of intermittent pumping wells for non-Darcy flow at low velocity are established, and mathematical models are solved by using finite element method. Then corresponding type curves are drawn and effects of wellbore storage and skin, mobility ratios and threshold pressure gradients are analyzed.