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- 저자 : Jianmeng Zhou (검색결과 2 건)
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Kefang Lai,Li Long,Fang Yi,Jiaman Tang,Zhe Chen,Fagui Chen,Jianmeng Zhou,Wen Peng,Liting Zhang,Hu Li,Wenzhi Zhan,Ruchong Chen,Wei Luo,Qiaoli Chen,Kian Fan Chung,Nanshan Zhong 대한천식알레르기학회 2019 Allergy, Asthma & Immunology Research Vol.11 No.6
Purpose: An older female predominance has been reported among chronic cough patients in Western countries, which is considered to be associated with a higher cough sensitivity in females. However, the characteristics of Chinese chronic cough patients remain unclear. This study aimed to explore the age and sex distribution as well as their relationship with cough reflex sensitivity to capsaicin in Chinese chronic cough patients. Methods: We analyzed the demographic features of 1,882 consecutive chronic cough patients who attended our cough clinic in Guangzhou, China. Cough sensitivity to capsaicin, which was defined as the lowest concentration of capsaicin causing 5 coughs or more (C5), was measured in 539 of the 1,882 patients and 68 healthy volunteers. Results: The mean age of the patients was 43.0 ± 13.7 years and patients aged <50 years accounted for more than two-thirds of the study population. Around 87% of the patients were never-smokers. The proportion of females (51.5%) was almost equal to that of males (48.5%). The pattern of the age and sex distribution was consistently reflected within most common causes of chronic cough, while a female predominance was shown in patients with coughvariant asthma and patients aged ≥50 years. Female patients had higher cough sensitivity to capsaicin than male patients (log C5: 1.58 ± 0.84 vs. 2.04 ± 0.84 μmol/L, P = 0.001), and patients aged ≥50 years had higher cough sensitivity to capsaicin than patients aged <50 years. Conclusions: In China, patients with chronic cough have a roughly equal sex distribution and a middle-aged predominance, irrespective of a higher cough sensitivity to capsaicin in females and older patients.
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Three-dimensional Multi-missile Cooperative Guidance Law with Time and Space Constraints
Jian Meng,Zhen Yang,Jichuan Huang,Haiyin Piao,Yiyang Zhao,Deyun Zhou 제어로봇시스템학회 2022 제어로봇시스템학회 국제학술대회 논문집 Vol.2022 No.11
This study focuses on the problem of multiple air-to-air missiles coordinated intercepting maneuvering targets in three-dimensional (3-D) space. A fixed time cooperative interception law with attack time and line-of-sight (LOS) angle limitations is proposed. Firstly, we extended the commonly used two-dimensional (2-D) space guidance model to 3-D space, and constructs a 3-D missile-target relative motion model. Secondly, the missile guidance model is decoupled to along and perpendicular to the LOS, and in the LOS direction, a cooperative guiding law based on fixed-time consistency theory is intended to guarantee that all missiles strikes the target at the same moment. Moreover, in the LOS normal direction, an adaptive approach rule is created, and the LOS angle of each missile is regulated to reaching to a given value in a defined time. According to the proposed fixed time fast non-singular terminal sliding mode surface, and spatial coordination is accomplished. In addition, based on Lyapunov stability theory, a detailed fixed time stability analysis is given. In the end, simulation is used to verify the feasibility and efficacy of the guideline law.
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