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Fang-xue Gong,1 Xin Zhou,2 Zhao-he Niu,1 Yan Mao,1 Yong-mei Wang,1 Meng Lv,1 Xue-qiang Gao,1 Wen-jing Liu,1 Hai-bo Wang1 1Department of Breast Disease Center, The Affiliated Hospital of Qingdao University, Qingdao, Shandong Province, People’s Republic of China; 2Qingdao Medical College of Qingdao University, Qingdao, Shandong Province, People’s Republic of ChinaCorrespondence: Hai-bo Wang, Department of Breast Disease Center, The Affiliated Hospital of Qingdao University, No. 59 Haier Road, Laoshan District, Qingdao City, Shandong Province, People’s Republic of China, Tel +86 18661805787, Email hbwang66@126.comPurpose: Autologous fat grafting (AFG) is a technique that can improve the appearance of breasts in surgical patients. There are currently few studies on breast-conserving surgery (BCS) combined with immediate AFG, although we believe that it could achieve satisfactory effects. Therefore, the purpose of this study is to observe the effects of BCS combined with immediate AFG on oncologic safety, satisfaction and psychology of breast cancer patients.Patients and Methods: We retrospectively collected the data of 85 breast cancer patients from February 2018 to October 2018. After screening, 40 patients in AFG group (AG, BCS combined with immediate AFG) and 40 patients in control group (CG, BCS alone) were finally included in the study. The primary outcomes were the survival, tumor recurrence and metastasis, and BREAST-Q score of patients. The secondary outcomes were short and long-term complications, degree of depression and anxiety of patients.Results: A total of 80 patients were included in the analysis. There was no significant difference in the clinicopathological data between the two groups (P> 0.05). The average follow-up time of the two groups was 40.58± 2.630 and 40.28± 2.679 months. In the analysis of oncologic safety, no patients died in AG and 1 patient died in CG. In addition, there was no significant difference between the two groups in terms of the overall recurrence rate and the distribution of recurrence types (P> 0.05). As for satisfaction, the BREAST-Q score of AG was significantly higher than that of CG (57.85± 4.833 vs 51.93± 5.045, P< 0.001). In the secondary outcomes, there was no short-term complication specified in the study; in the long-term complications, the incidence of calcification in AG was not significantly higher than that in CG (P=0.065). In the analysis of depression and anxiety, there was no significant difference between the two groups (P> 0.05).Conclusion: BCS combined with immediate AFG can significantly improve patients’ satisfaction without increasing the risk of death and tumor recurrence. However, it does not seem to play a role in improving the conditions of depression and anxiety.Keywords: breast cancer, breast-conserving surgery, autologous fat grafting, oncologic safety, BREAST-Q, psychology

In order to extract target radial acceleration from radar echo signal at low SNR (signal-to-noise), this paper employed FRFT (fractional Fourier transformation) to analyze short-duration radar echo and studied the relations between signal convergence peaks in matched transformation domain and signal duration and modulated frequency of signal. When signal duration is specified, the method of multiplying sampled signal by the known frequency modulated signal to alter modulated frequency was presented, which generated the new signal with larger convergence peaks than the initial signal in matched transformation domain. Thus, it could successfully estimate the radial acceleration of radar target at low SNR. Simulations were conducted to show the feasibility and effectiveness of the method.

Radial acceleration of radar target is characteristic of relative motion between radar and target, and is significant for maneuvering target recognition and tracking. To estimate radial acceleration from radar echo, fractional Fourier transformation (FRFT) was used in this paper. The acceleration estimation formula was deduced firstly, and then its estimation flow was given out. Differences in antinoise interference capability between FRFT, WVD-HT (Wigner-Ville distribution and Hough transformation) and WVD (Wigner-Ville distribution) in estimating chirp signal parameters were analyzed. Then the relation between acceleration measurement accuracy and angle search step was deduced, and lastly simulations were made, proving that the method can improve operational speed, control operational precision and be also of better antinoise interference capability than other methods.