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Malaria from hyperendemicity to elimination along international borders in Yunnan, China during 2003‒2020: a case study

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Infectious Diseases of Poverty 2022年第3期11卷 69-80页

作者： Hui Liu Yaowu Zhou Yan Deng Zurui Lin Canglin Zhang Qiyan Chen Chun Wei Kaixia Duan Peng Tian Hongning zhou Jianwei Xu Yunnan Institute of Parasitic Diseases Yunnan Provincial Centre of Malaria ResearchYunnan Provincial Key Laboratory of Vector-Borne Diseases Control and ResearchYunnan Institute of Parasitic Diseases Innovative Team of Key Techniques for Vector Borne Disease Control and PreventionTraining Base of International Scientific Exchange and Education in Tropical Diseases for South and Southeast AsiaPuer665000China

Background: Border malaria is one of the most intractable problems hindering malaria elimination worldwide.Movement of both the human population and anopheline mosquitoes infected with Plasmodium spp.can cause cross-border malaria transmission.The Yunnan border area was still hyperendemic for malaria in the early part of this century.The objective of this case study was to analyze the strategies,interventions and impacts of malaria control and elimination in the Yunnan border area.Main text: A total of 10,349 malaria cases and 17.1 per 10,000 person-years of annual parasite incidence(API)were reported in the border area in 2003.Based on natural village-based stratification,integrated interventions,including mass drug administration for radical cures and preventive treatment,clinically presumptive treatment of all febrile patients for malaria and indoor residual spraying or dipping bed nets with insecticides were successfully carried out from 2003 to 2013.The overall API was reduced to 0.6 per 10,000 person-years by 2013,while effective cross-border collaboration interventions dramatically reduced the malaria burden in the neighbouring border areas of Myanmar.From 2014 forward,the comprehensive strategy,including universal coverage of surveillance to detect malaria cases,a rapid response to possible malaria cases and effective border collaboration with neighbouring areas,successfully eliminated malaria and prevented reintroduction of malaria transmission in the Yunnan border area.Conclusions: In Yunnan malaria burden has successfully reduced by dynamically accurate stratification and comprehensive interventions;and then the region achieved elimination and prevented reintroduction of malaria transmission through intensive surveillance,rapid response and border collaboration.Other border areas should perform their own intervention trials to develop their own effective strategy.

关键词： Malaria Control Elimination Border area International collaboration Yunnan China

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High efficient moving object extraction and classification in traffic video surveillance

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Journal of Systems Engineering and Electronics 2009年第4期20卷 858-868页

作者： Li Zhihua zhou Fan Tian Xiang Chen yaowu Inst. of Advanced Digital Technology and Instrument Zhejiang Univ. Hangzhou 310027 P. R. China

Moving object extraction and classification are important problems in automated video surveillance systems. A background model based on region segmentation is proposed. An adaptive single Gaussian background model is used in the stable region with gradual changes, and a nonparametric model is used in the variable region with jumping changes. A generalized agglomerative scheme is used to merge the pixels in the variable region and fill in the small interspaces. A two-threshold sequential algorithmic scheme is used to group the background samples of the variable region into distinct Gaussian distributions to accelerate the kernel density computation speed of the nonparametric model. In the feature-based object classification phase, the surveillance scene is first partitioned according to the road boundaries of different traffic directions and then re-segmented according to their scene localities. The method improves the discriminability of the features in each partition. AdaBoost method is applied to evaluate the relative importance of the features in each partition respectively and distinguish whether an object is a vehicle, a single human, a human group, or a bike. Experimental results show that the proposed method achieves higher performance in comparison with the existing method.

关键词： background model nonparametric model adaptive single Gaussian model object classification

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Motion estimation based feature selection for visual SLAM

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High Technology Letters 2011年第4期17卷 433-438页

作者：孟旭炯 Jiang Rongxin zhou Fan Chen yaowu Institute of Advanced Digital Technologies ＆ Instrumentation Zhejiang University Hangzlaou 310027 P.R.China

Feature selection is always an important issue in the visual SLAM (simultaneous location and mapping) literature. Considering that the location estimation can be improved by tracking features with larger value of visible time, a new feature selection method based on motion estimation is proposed. First, a k-step iteration algorithm is presented for visible time estimation using an affine motion model; then a delayed feature detection method is introduced for efficiently detecting features with the maximum visible time. As a means of validation for the proposed method, both simulation and real data experiments are carried out. Results show that the proposed method can improve both the estimation performance and the computational performance compared with the existing random feature selection method. © by HIGH TECHNOLOGY LETTERS PRESS.

关键词：特征选择运动估计 SLAM 视觉位置估计时间价值迭代算法模型估计

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Phylogeny and biogeographic history of Ulmaceae based on complete chloroplast genome and nuclear sequences

Phylogeny and biogeographic history of Ulmaceae based on com...

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中国植物学会第十六次全国会员代表大会暨85周年学术年会

作者： Qiuyue Zhang Zhekun zhou yaowu Xing Key Laboratory of Tropical Forest Ecology Xishuangbanna Tropical Botanical GardenChinese Academy of Sciences University of Chinese Academy of Sciences Key Laboratory for Plant Diversity and Biogeography of East Asia Kunming Institute of BotanyChinese Academy of Sciences

Ulmaceae species are important woody plants distributed in the north temperate forest.However,phylogenetic relationships and biogeographic history of Ulmaceae have been poorly resolved.In this study,we reconstructed its phylogeny and diversification and biogeographic histories based on complete chloroplast genome and partial nuclear sequences.Our results showed that all genera were monophyletic with high support except for the genus Ulmus.Ulamceae was mainly divided into temperate clade [（Ulmus+Zelkova）+Hemiptelea] and tropical clade [（Ampelocera+Phyllostylon）+Holoptelea] according to the complete chloroplast genome with the exception that the genus Planera was closest to the Euramerican species of Ulmus in complete chloroplast genome versus sister to Zelkova in partial nuclear sequences.We deduced that Planera should be merged into Ulmus or the Euramerican species of Ulmus and Planera should be erected as a new genus.Molecular dating analysis suggested that the origin of Ulamceae may date back to early cretaceous about 117.64 Ma.Most of the genera were diverged during Paleocene to Eocene and species diversity raised during the Miocene.Biogeographic analysis showed that the temperate clade may be originated in East Asia and the ancestral region for tropical clade remains unclear probably duo to ancient events.

关键词： Ulmaceae complete chloroplast genome nuclear sequences phylogeny biogeography

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Evolution of stomatal and trichome density of the Quercus delavayi complex since the late Miocene

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Chinese Science Bulletin 2014年第3期59卷 310-319页

作者： Qian Hu yaowu Xing Jinjin Hu Yongjiang Huang Hongjie Ma Zhekun zhou Key Laboratory of Biogeography and Biodiversity Kunming Institute of BotanyChinese Academy of Sciences University of Chinese Academy of Sciences Key Laboratory of Tropical Forest Ecology Xishuangbanna Tropical Botanical GardenChinese Academy of Sciences Institute of Systematic Botany University of Zrich Faculty of Land Resource Engineering Kunming University of Science and Technology

A fossil oak species,Quercus tenuipilosa Q.Hu et Z.K.zhou,is reported from the upper Pliocene Ciying Formation in Kunming,Yunnan Province,southwestern China.The establishment of this species is based on detailed morphologic and cuticular investigations.The fossil leaves are elliptic,with serrate margins on the apical half.The primary venation is pinnate,and the major secondary venation is craspedodromous.The tertiary veins are opposite or alternate-opposite percurrent with two branches.The stomata are anomocytic,occurring only on the abaxial epidermis.The trichome bases are unicellular or multicellular.The new fossil species shows the closest affinity with theextant Q.delavayi and the late Miocene Q.praedelavayi Y.W.Xing et Z.K.zhou from the Xiaolongtan Formation of the Yunnan Province.All three species share similar leaf morphology,but differ with respect to trichome base and stomatal densities.Q.tenuipilosa.Q.praedelavayi,and Q.delavayi can be considered to constitute the Q.delavayi complex.Since the late Miocene,a gradual reduction in trichome base density has occurred in this complex.This trend is the opposite of that of precipitation,indicating that increased trichome density is not an adaptation to dry environments.The stomatal density(SD)of the Q.delavayi complex was the highest during the late Miocene,declined in the late Pliocene,and then increased during the present epoch.These values show an inverse relationship with atmospheric CO_2 concentrations,suggesting that the SD of the Q.delavayi complex may be a useful proxy for reconstruction of paleo-CO_2 concentrations.

关键词：气孔密度晚中新世二氧化碳浓度演变皮毛栎化石种云南昆明

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Stable carbon and nitrogen isotope evidence of human and pig diets at the Qinglongquan site,China

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Science China Earth Sciences 2011年第4期54卷 519-527页

作者： GUO Yi HU yaowu ZHU JunYing zhou Mi WANG ChangSui Michael P. RICHARDS Department of Human Evolution Max-Planck Institute for Evolutionary Anthropology Leipzig D-04103 Germany Lab of Human Evolution Institute of Vertebrate Paleontology and Paleoanthropology Chinese Academy of Sciences Beijing 100044 China Department of Scientific History andArchaeometry Graduate University of Chinese Academy of Sciences Beijing 100049 China Department of Cultural Heritage and Museology School of Humanities Zhejiang University Hangzhou 310028 China Hubei Provincial Institute of Cultural Relics and Archaeology Wuhan 430077 China

Previous studies on the Rice-Millet(foxtail millet and common millet) Blended Zone in Chinese Neolithic have not clearly addressed such questions as the importance of primitive rice-millet mixed agriculture to human lifestyle and livestock managements within this region,the relationship among the development of the agriculture,paleoenvironment,and cultural interactions,and so on.Here stable carbon and nitrogen isotope analysis of human and pig bones from the Qinglongquan site was conducted,covering two cultural phases,namely the Qujialing Culture(3000 BC to 2600 BC) and the Shijiahe Culture(2600 BC to 2200 BC) .Based on this analysis,we further discussed the diets of ancient humans and pigs in the site,investigated the importance of rice-millet mixed agriculture to human and pig diets,and explored the relationship among the primitive rice agriculture and millet agriculture,cultural interactions,and paleoenvironment.The δ13C values of human bone collagen(-16.7‰ to-12.4‰,averaging-14.6‰±1.3‰,n=24) revealed that both C3 and C4 foods were consumed,probably from the contribution of rice(C3 plant) and millets(C4 plants) due to the coexistence of these crops at this site.In addition,the human mean δ13C value suggested that millet agriculture was only minor in human diets.The human δ15N values(6.6‰to 10.8‰,averaging 9.0‰±1.2‰,n=24) showed that animal resources played a significant role in human diets,and varied greatly.The mean δ13C value of the pigs(-14.3‰±2.5‰,n=13) was quite similar to that of the humans,but the mean δ15N value of the pigs was slightly less(1.3‰) .The similar δ13C and δ15N values between humans and pigs suggested that the pigs consumed a lot of humans'food remains.No correlations of the δ13C and δ15N values between humans and pigs showed that both human and pig diets were based mainly on plant foods,which might be related to highly developed rice-millet mixed agriculture at that time. In comparison with the human and pig diets between the two periods,millet agriculture contributed more than 10%in the

关键词：人类生活猪饲料氮同位素定碳中国稻作农业植物性食物证据

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一种基于编码域的自适应灵活宏块次序方法

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仪器仪表学报 2011年第9期32卷 2127-2131页

作者：周怡然陈耀武大连海事大学信息科学技术学院大连116026 浙江大学数字技术及仪器研究所杭州310027

针对不可靠传输会导致视频码流质量下降的问题,提出了一种基于编码域的自适应灵活宏块次序(FMO)方法用于视频容错编码。首先提取出图像的运动区域,然后依据对传输环境和图像特征的分析,计算出该运动区域的错误敏感度。在错误敏感度的基... 详细信息

针对不可靠传输会导致视频码流质量下降的问题,提出了一种基于编码域的自适应灵活宏块次序(FMO)方法用于视频容错编码。首先提取出图像的运动区域,然后依据对传输环境和图像特征的分析,计算出该运动区域的错误敏感度。在错误敏感度的基础上,计算最优的FMO编码模式,以使容错强度能够更有自适应性。为提高计算效率,主要的运算信息均来自编码域,即编码过程中产生的结果。实验结果表明:相较于固定FMO模式的方法,文章提出的方法能够更为显著地改善不可靠传输时的视频质量,且计算效率较高。

关键词：灵活宏块次序编码域错误敏感度运动区域提取容错视频编码 H.264

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马尔可夫状态转换GARCH族模型的选择与估计

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统计与决策 2021年第18期37卷 14-18页

作者：李强周婉玲董耀武贵州财经大学大数据应用与经济学院贵阳550025 贵州省大数据统计分析重点实验室贵阳550014 暨南大学管理学院广州510630 贵州商学院金融学院贵阳550014

文章基于比特币波动率数据,采用马尔可夫状态转换GARCH族模型对常用的两种估计方法--极大似然估计和贝叶斯估计进行比较研究。结果显示,在模型参数估计方面,不同估计下的标准GARCH族模型的参数估计结果差异不大,但随着状态数量增加和残... 详细信息

文章基于比特币波动率数据,采用马尔可夫状态转换GARCH族模型对常用的两种估计方法--极大似然估计和贝叶斯估计进行比较研究。结果显示,在模型参数估计方面,不同估计下的标准GARCH族模型的参数估计结果差异不大,但随着状态数量增加和残差分布改变其差异会变大。在模型应用方面,对比特币收益率序列进行风险测度发现,其风险水平总体上差别不大,引起差异的原因可能与模型选择、残差分布、状态数量及置信水平有关。由于MCMC算法比较依赖计算机技术,随着状态数量的增加,在MCMC估计下的马尔可夫状态转换GARCH族模型的程序运行时间更长,风险预测值差别不大时可考虑采用经典的极大似然估计。

关键词： MSGARCH模型 GJR-GARCH模型极大似然估计 MCMC算法

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便携式三维成像声纳的非网格化稀疏阵列技术

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华南理工大学学报（自然科学版） 2019年第2期47卷 24-30页

作者：赵冬冬刘雪松周凡陈耀武浙江大学数字技术及仪器研究所浙江杭州310027 浙江省网络多媒体技术研究重点实验室浙江杭州310027 浙江大学工业控制技术国家重点实验室浙江杭州310027

为降低便携式三维成像声纳系统的硬件开销,同时保证阵列的波束性能,提出了一种非网格化阵列稀疏方法.该方法基于十字型阵列,在模拟退火算法中加入阵元位置扰动,以实现对十字型阵列的非网格稀疏优化,降低阵元数量;引入多频发射和并行子... 详细信息

为降低便携式三维成像声纳系统的硬件开销,同时保证阵列的波束性能,提出了一种非网格化阵列稀疏方法.该方法基于十字型阵列,在模拟退火算法中加入阵元位置扰动,以实现对十字型阵列的非网格稀疏优化,降低阵元数量;引入多频发射和并行子阵接收波束形成算法,构建模拟退火算法中新的能量函数,以保证十字型稀疏阵列具有成像实时性以及较低的计算需求.最后利用该方法对100+100的十字型阵列进行稀疏优化.实验结果表明,该方法获得的非网格化稀疏阵列能够获得预设的波束性能,并具有成像的实时性和较低的计算需求;与现有文献相比,在保持相同波束性能的条件下,该稀疏阵列具有最少的阵元数量.

关键词：成像声纳传感器阵列模拟退火波束形成

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深圳轨道交通发展对居民活动机会影响分析

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现代城市研究 2021年第4期36卷 18-22页

作者：周青峰王耀武戴冬晖哈尔滨工业大学(深圳)建筑学院

在对深圳轨道交通不同时期的居民活动机会测算基础上,利用Dagum基尼系数和核密度估计对其公平性进行测度和分析。结果表明:居民活动机会随着深圳轨道交通发展在增大,同时不同群体间的机会差距也在扩大。公平特征为深圳轨道交通发展先加... 详细信息

在对深圳轨道交通不同时期的居民活动机会测算基础上,利用Dagum基尼系数和核密度估计对其公平性进行测度和分析。结果表明:居民活动机会随着深圳轨道交通发展在增大,同时不同群体间的机会差距也在扩大。公平特征为深圳轨道交通发展先加剧了活动机会的不公平,然后又提高了其公平性。深圳轨道交通在不同区位的发展差异是居民活动机会分配不公平的主要原因,希望文章提出的工作框架和模型能够为城市公共交通发展公平性评价提供参考。

关键词：城市轨道交通活动机会 Dagum基尼系数核密度估计深圳

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