Augmented safety guarantee-based area keeping control for an underactuated USV with environmental disturbances.

This paper proposes an accurate area keeping control method with augmented safety guarantee for an underactuated unmanned surface vessel (UUSV) with environmental disturbances. It can mediate the safety and the stability during the UUSV area keeping control. Firstly, inspired by the notion of control barrier function (CBF) in general manifolds, an augmented safety guarantee is constructed to deal with the nonlinear safety constraints of the area keeping control for the UUSV. Then, the stability constraints for the UUSV area keeping control are formed by involving a control Lyapunov functions (CLF) and a weather optimal control (WOC) method. Finally, by unifying the augmented safety guarantee and the stability constraints, an accurate area keeping controller is designed through a quadratic program (QP), which can consider the safety problem into the optimal area keeping control of the UUSV under environmental disturbances. Comparing the proposed method to the WOC, simulation results validate the feasibility and the superiority of the proposed method.

Discussion on the Treatment Strategy for Stage â ¡A1 Cervical Cancer (FIGO 2018).

Objective: This study aimed to explore the best treatment strategy for International Federation of Gynecology and Obstetrics (FIGO) 2018 stage IIA1 cervical cancer patients by comparing the survival outcomes of two treatment methods: abdominal radical hysterectomy (ARH) with standard postoperative therapy and radio-chemotherapy (R-CT). Methods: Patients with FIGO2018 stage IIA1 cervical cancer who underwent ARH or received R-CT were screened from the clinical diagnosis and treatment for cervical cancer in China (Four C) database. The recurrence cases between the two groups were analyzed. The 5-year overall survival (OS) and disease-free survival (DFS) of patients diagnosed with stage IIA1 cervical cancer in 47 hospitals in mainland China between 2004 and 2018 were compared by using propensity score matching (PSM). Results: A total of 724 patients met the inclusion criteria. In the total study population, The R-CT group had higher recurrence (22.8% for the R-CT group and 11.2% for the ARH group, P<0.001) rates compared to the ARH group.The 5-year OS and DFS of the ARH group (n=658) were significantly higher than those of the R-CT group (n=66) (OS: 85.9% vs. 71.2%, P=0.009; DFS: 79.2%vs. 70.5%, P=0.027). R-CT was associated with worse 5-year OS (HR=3.19, 95% CI: 1.592-6.956, P=0.001) and DFS (HR=2.089, 95% CI: 1.194-3.656, P=0.01). After 1:2 PSM, the 5-year OS and DFS of the ARH group (n=126) were significantly higher than those of the R-CT group (n=64) (OS:88.9% vs. 70.1%, P=0.04; DFS:82.8% vs. 69.8%, P=0.019). R-CT was still associated with worse 5-year OS (HR=2.391, 95% CI: 1.051-5.633, P=0.046) and DFS (HR=2.6, 95% CI: 1.25-5.409, P=0.011). Conclusion: Our study demonstrated that for stage FIGO2018 stage IIA1 cervical cancer patients, ARH offers better oncological outcomes than R-CT.

[The observation and evaluation of curative effect of nasal mucosa dryness, hemorrhae and erosion].

Objective:To observe the curative effects of four kinds of plant extracts nasal spray mixture （myrtle oil, hyaluronic acid, fucoidan, anthocyanin） on 161 patients with nasal mucosa dryness, hemorrhae and erosion. Methods:① Diagnosis: patients with nasal dryness, erosive and hemorrhae nasal septum mucosa confirmed by patients' complaints and nasal endoscopic test; ② Evaluation: the severity of subjective symptoms was evaluated by VAS score method from 0 to 10 points; the degree of mucosal lesions was divided into 0-8 points by nasal endoscopic test. ③ Intranasal Intranasal administration: 2 times per-day with 2 sprays on each side of the nasal cavity, and no less than 6-8 weeks. In the patients which with allergic rhinitis were also given conventional oral administration of montelukast at the same time. ④ Follow up and curative effect evaluation: VAS and nasal endoscopic test scores that before and after treatment was statistically processed; the patients' own how feels the treatment were evaluated; finally, doctor made the final evaluation based on the combined results of subjective and objective evaluation results before and after treatment, the patients' satisfaction with treatment effect. Results:① There were significant differences in VAS scores of 161 patients before and after treatment （P<0.01）.② There were statistically significant differences in nasal endoscopic test scores of 104 patients before and after treatment （P<0.01）. ③ Patients' satisfaction survey showed the satisfied with the compliance, tolerance and treatment effect was 95%. Conclusion:The mixed nasal spray of four plant extracts can effectively improve the dryness, hemorrhae and erosion of nasal mucosal.

Characterization of key aroma compounds from different rose essential oils using gas chromatography-mass spectrometry, gas chromatography-olfactometry and partial least squares regression.

To characterise the key aroma compounds of rose essential oils, five samples (Rosa damascena essential oil, Rosa centifolia essential oil, Rosa alba essential oil, Rosa rugosa cv. 'Plena' essential oil, Rosa xanthina Lindl essential oil) were analysed by gas chromatography-olfactometry (GC-O), gas chromatography-mass spectrometry (GC-MS) and quantitative descriptive analysis (QDA). Thirty-nine aroma compounds were selected as key aroma compounds by GC-MS and GC-O. The aroma of rose essential oils was described by 10 sensory attributes such as honey, sweet, fermented, spicy, fruity, woody, floral, herbal, green and fresh. The partial least squares regression (PLSR) result showed the relationship between key aroma compound and characteristic aromas of rose essential oils. This paper provided a reference for the flavourists.

Characterization of the Key Aroma Compounds in Five Varieties of Mandarins by Gas Chromatography-Olfactometry, Odor Activity Values, Aroma Recombination, and Omission Analysis.

In this study, volatile compounds of five varieties of mandarin juices [Tankan, Miyagawa, Mashui (MS), Skiranui, and Ponkan (PG)] were investigated by gas chromatography-olfactometry (GC-O) and gas chromatography-mass spectrometry (GC-MS). A total of 47 volatile compounds were identified by GC-MS. Partial least-squares regression was used to process the mean scores from sensory evaluation by panelists of volatile compounds and samples. The sample PG was associated with "fruity", "floral", and "sweet" notes, while MS was correlated with "green" and "peely" notes. In addition, 36 aroma-active compounds, including esters, alcohols, aldehydes, ketones, and monoterpenes, were detected by GC-O. According to the quantitative results, 29 aroma compounds were important, which indicated that their odor activity values (OAVs) were ≥1. On the basis of the GC-O results and OAVs of these volatile compounds, 22 odor-active compounds were mixed to simulate successfully the overall aroma of PG mandarin juice. Furthermore, omission experiments confirmed that nonanal, hexanal, linalool, and (R)-(+)-limonene were the key odorants for the overall aroma of PG juice sample and that ß-ionone, decanal, γ-terpinene, and methyl butyrate were also important odor-active compounds.

Characterization of odor-active compounds of various Chrysanthemum essential oils by gas chromatography-olfactometry, gas chromatography-mass spectrometry and their correlation with sensory attributes.

Volatiles of five kinds of Chrysanthemum essential oils with different manufactures were characterized by descriptive sensory analysis, gas chromatography-olfactometry (GC-O), gas chromatography-mass spectrometry (GC-MS) and statistics analysis. Six sensory attributes (floral, woody, grassy, fruity, sour and minty) were selected to assess Chrysanthemum essential oils. A total of 38 volatile compounds were detected and quantified using standard substances by GC-O and GC-MS. Terpenes constituted the largest chemical group among the volatiles of the essential oils. Then partial least squares regression (PLSR) was used to elucidate the relationship between sensory attributes and aroma compounds. The result showed that α-pinene, ß-thujene, α-terpinolen, ß-cubebene, caryophyllene, (Z)ß-farnesene, (-)-spathulenol, linalool, camphor, camphene, 4-terpineol, Z-citral and 4-isopropyltoluene were typical aroma compounds covaried with characteristic aroma of Chrysanthemum essential oils.