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基于最大生成树的传感器任务分配方法研究

中北大学学报（自然科学版） 2012年第4期33卷 471-473,479页

作者：任爱芝中北大学信息与通信工程学院山西太原030051

根据集合论中偏序关系集和集合论中的特殊图中生成树的概念,提出了一种传感器任务分配和选择方法.建立了传感器任务分配模型,得到其最大生成树,根据任务的重要程度和传感器在任务中的重要程度来决定传感器的使用.算例分析表明:该方法适... 详细信息

根据集合论中偏序关系集和集合论中的特殊图中生成树的概念,提出了一种传感器任务分配和选择方法.建立了传感器任务分配模型,得到其最大生成树,根据任务的重要程度和传感器在任务中的重要程度来决定传感器的使用.算例分析表明:该方法适合于均匀分布以及指定任务优先级两种情况下的传感器任务分配,计算简单、方法具有规律性,可用计算机程序实现.

关键词：传感器管理传感器分配偏序关系最大生成树

基于排序函数法求解完全模糊双层线性规划问题

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模糊系统与数学 2016年第4期30卷 76-82页

作者：任爱红宝鸡文理学院数学与信息科学学院陕西宝鸡721013

针对系数和决策变量均为模糊数的完全模糊双层线性规划问题,给出了此类问题的可行域及模糊最优解的定义;利用三角模糊数的排序函数法和比较运算性质,讨论了完全模糊双层线性规划问题的转化定理;基于这个转化定理,将完全模糊双层线性规... 详细信息

针对系数和决策变量均为模糊数的完全模糊双层线性规划问题,给出了此类问题的可行域及模糊最优解的定义;利用三角模糊数的排序函数法和比较运算性质,讨论了完全模糊双层线性规划问题的转化定理;基于这个转化定理,将完全模糊双层线性规划问题转化为确定性的双层线性规划问题进行求解。最后通过一个数值例子表明了求解方法的可行性。

关键词：双层规划问题三角模糊数排序函数

Postvaccination breakthrough SARS-CoV-2 infections among adults in Malaysia and attitudes towards future vaccination

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Asian Pacific Journal of Tropical Medicine 2023年第7期16卷 296-304页

作者： Praneetha Kumar Nair Kai Ern Koh Christine Yvonne Bede Lee ai ren Natasha Mevuni Dinethma Mahanama Thin Mon Kyaw Htoo Htoo Kyaw Soe Soe Moe Kazi Majidur Rahaman Mila Nu Nu Htay Faculty of Medicine Manipal University College MalaysiaMalaysia Department of Community Medicine Faculty of MedicineManipal University College MalaysiaMalaysia Department of Medicine Faculty of MedicineManipal University College MalaysiaMalaysia

Objective:To determine the frequency and severity of the breakthrough infections and the associated factors in ***:This cross-sectional study was conducted among the adult general population in Malaysia who completed at least one dose of *** validated online questionnaires were used for data collection between December 2022 to February *** participants were recruited by a convenient sampling *** data were analysed by descriptive statistics,and logistic regression by using SPSS(Version 27).Qualitative data from open-ended questions were analysed as thematic analysis by using RQDA ***:A total of 524 participants'data were analyzed and 77.5%of them completed three doses of COVID-19 *** infections after vaccination were reported in 57.3%of the *** group of 18 and 30 years(aOR 2.32,95%CI 1.01-5.32)and other ethnicities(aOR 2.00,95%CI 1.02-3.93)significantly associated with the occurrence of breakthrough infections.A total of 35.5%of the participants were not willing to take another booster dose in the future because of their attitudes towards fear of long-term side effects,lack of trust to the vaccine,less susceptibility to severe infection,belief in natural immunity,and ***:Future public health policies and interventions should be focused on disseminating the information about safety of booster doses of vaccine,management and re-assurance of side effects,and targeted vaccination to the working(younger age group)and ethnic minorities.

关键词： COVID-19 SARS CoV-2 Breakthrough infection Vaccine Malaysia

Micronuclei rate and hypoxanthine phosphoribosyl transferase mutation in radon-exposed rats

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Progress in Natural Science:Materials International 2008年第10期18卷 1305-1308页

作者： Fengmei Cui Saijun Fan Mingjiang Hu Jihua Nie Hongmei Li Jian Tong Department of Radiotoxicology,School of Radiation Medicine and Public Health,Suzhou University,Suzhou Industry Park ren’ai Road 199,Suzhou 215123,China Department of Radiotoxicology School of Radiation Medicine and Public Health Suzhou University Suzhou Industry Park Ren’ai Road 199 Suzhou 215123 China

The genetic changes in rats with radon exposure were studied by the micronucleus technology and detection of hypoxanthine phos- phoribosyl transferase (hprt) *** rate of the micronuclei in peripheral blood lymphocytes and tracheal-bronchial epithelial cells in the radon-inhaled rats was higher than that of the controls (Pained from the hprt assay,which showed a higher mutation frequency in radon-exposed *** results suggested that micronuclei rate and hprt deficiency could be used as biomarkers for the genetic changes with radon exposure.

关键词： Radon Tracheal-bronchial epithelial cell Peripheral blood lymphocyte Micronuclei Hypoxanthine phosphoribosyl transferase

Study on the inhibition of vascular endothelial growth factor expression in Tca8113 cell by inducible nitric oxide synthase gene RNA interference

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中国口腔颌面外科杂志 2008年第B5期6卷 189-190页

作者： Wei Liang Chen Lan Yang Wei Jian ai Ji ren Zhang Department of Maxillofacial Surgery Guangdong ProvincialStomatology Hospital . Guangzhou 510280China

Purpose: To investigate the regulation of inducible nitric oxide synthase ( iNOS )to vascular endothelial growth factor (VEGF) expression。Methods: we used RNA interference (RNai) technique and transfected the vector which involves short hairpin RNA of iNOS to Tca8113 cell by LIPOFECTAM1NE 2000, detected the iNOS and VEGF's change in the gene and protein expression level by RT-PCR and Western-blotting for the sake of finding out if iNOS can regulate the expression of VEGF。Results: the VEGF expression in Psilencer-iNOS group Tca8113 cell decreased in both mRNA and protein level to a certain degree。

关键词：抑制作用 Tca8113细胞含氮氧化物基因核酸

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OFDM系统载波频率偏移估计

西安电子科技大学学报 2005年第5期32卷 807-812页

作者：任爱锋殷勤业西安交通大学电子与信息工程学院

正交频分复用技术可广泛应用于未来高速多媒体通信,但它对发射机与接收机本振之间存在的载波频率偏移却非常敏感,从而引入了载波间干扰.因此,在正交频分复用通信系统中,接收信号必须进行频率偏移估计和补偿来减小载波间干扰并维持子载... 详细信息

正交频分复用技术可广泛应用于未来高速多媒体通信,但它对发射机与接收机本振之间存在的载波频率偏移却非常敏感,从而引入了载波间干扰.因此,在正交频分复用通信系统中,接收信号必须进行频率偏移估计和补偿来减小载波间干扰并维持子载波之间的正交性.给出了加入循环前缀和具有虚拟子载波的正交频分复用系统的数学模型,利用DOA-MATR IX方法,提出了一种新的载波频率偏移估计算法.该算法计算量小,容易获得频率偏移量,同时可得到蕴涵信道信息的矩阵估计,有利于接收信号的频率偏移补偿和解调.

关键词：载波频率偏移载波间干扰离散傅里叶变换正交频分复用

A FAS approach for stabilization of generalized chained forms: part 1. Discontinuous control laws

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Science China(Information Sciences) 2024年第2期67卷 118-143页

作者： Guang-ren DUAN Center for Control Theory and Guidance Technology Harbin Institute of Technology Center for Control Science and Technology Southern University of Science and Technology

In this paper, a type of general nonholonomic systems is proposed, which contains both the Brockett’s two example systems, and their extended n-dimensional chained forms, as special cases. For the stabilization of such systems, a stabilizing controller is proposed based on the fully actuated system(FAS)approach, which is discontinuous at the origin but time-invariant when the open-loop system is time-invariant,and drives the feasible trajectories of the system to the origin exponentially. Furthermore, the proposed FAS approach is also extended to the sub-normal system case and the time-delay system case.

关键词： nonholonomic systems feedback stabilization exponential convergence sub-fully actuated systems time-delay systems

Cesarean delivery on maternal request and childhood intelligence： a cohort study

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Chinese Medical Journal 2011年第23期124卷 3982-3987页

作者： LI Hong-tian YE Rong-wei PEI Li-jun ren ai-guo ZHENG Xiao-ying LIU Jian-meng Institute of Reproductive and Child Health/Ministry of Health Key Laboratory of Reproductive Health Peking University Health Science Center Beijng 100191 China

Background Cesarean section births have been steadily increasing over the past decade and have become an epidemic in China. Cesarean delivery on maternal request is a major contributor to this upward trend, and there has been of much concern about its impact on maternal and child health. Most of mothers believe that cesarean delivery on maternal request can improve the child＇s intelligence, but direct evidence is sparse. In this cohort study, we aimed to directly assess the impact of cesarean delivery on maternal request on childhood intelligence. Methods Intelligence quotient （IQ） of 4144 preschool children from 21 cities/counties of Zhejiang and Jiangsu province whose mothers were registered in a population-based perinatal surveillance program during 1993-1996 was assessed with Chinese Wechsler Young Children Scale of Intelligence （C-WYCSI） in 2000. The outcomes were full-scale IQ, verbal IQ, and performance IQ of C-WYCSI. Mode of delivery and covariates were obtained from the surveillance program. We estimated unadjusted and adjusted effects of cesarean delivery on maternal request and assisted vaginal delivery on IQ scores compared with spontaneous vaginal delivery using regression analysis. Results The mean full-scale, verbal, and performance IQ for all children was 99.3_＋16.1,93.6_＋17.7, and 105.3_＋14.3. In crude analysis, cesarean delivery on maternal request versus spontaneous vaginal delivery was associated with an increase of 3.9 （95% confidence interval, 0.6 to 7.2） points in full-scale IQ, 4.8 （1.2 to 8.4） points in verbal IQ, and 2.4 （-0.6 to 5.3） points in performance IQ. After adjusting for maternal education, occupation, and IQ, the advantage was reduced to 1.6 （-1.3 to 4.5）, 2.3 （-0.8 to 5.5）, and 0.6 （-2.0 to 3.3） points for full-scale, verbal, and performance IQ, respectively. Assisted vaginal delivery versus spontaneous vaginal delivery was not associated with IQ scores in any analysis. Conclusion Neither cesarean delivery on maternal request nor

关键词： cesarean delivery on maternal request child intelligence quotient

A FAS approach for stabilization of generalized chained forms: part 2. Continuous control laws

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Science China(Information Sciences) 2024年第3期67卷 114-135页

作者： Guang-ren DUAN Center for Control Theory and Guidance Technology Harbin Institute of Technology Shenzhen Key Laboratory of Control Theory and Intelligent Systems Southern University of Science and Technology

In this paper, continuous time-varying stabilizing controllers for the type of general nonholonomic systems proposed and treated in part 1 are designed using the fully actuated system(FAS) approach. The key step is to differentiate the first scalar equation, and by control of the obtained second-order scalar system, a proportional plus integral feedback form for the first control variable is obtained. With the solution to this designed second-order scalar system, the rest equations in the nonholonomic system form an independent time-varying subsystem which is then handled by the FAS approach. The overall designed controller contains an almost arbitrarily chosen design parameter, and is proven to guarantee the uniformly and globally exponential stability of the closed-loop system. The proposed approach is simple and effective,and is demonstrated with a practical example of ship control.

关键词： nonholonomic systems feedback stabilization fully actuated systems Lyapunov stability continuous controllers