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Integration of InSAR and GPS for hydraulic engineering

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Science China(Technological Sciences) 2007年第Z1期50卷 111-124页

作者： HE xiufeng LUO HaiBin huang QiHuan HE Min Institute of Satellite Navigation & Spatial Information System Hohai UniversityNanjing 210098China Institute of Satellite Navigation & Spatial Information SystemHohai UniversityNanjing 210098China Institute of Satellite Navigation & Spatial Information SystemHohai UniversityNanjing 210098China Institute of Satellite Navigation & Spatial Information SystemHohai UniversityNanjing 210098China

Interferometric synthetic aperture radar (InSAR) is a potential earth observation approach, and it has been demonstrated to have a variety of applications in measuring ground movement, urban subsidence and landslides. Currently InSAR provides the ability to map accurate DEM and measure ground deformation to sub-centimeter accuracy. However, many factors affect InSAR to measure ground movement since dam constructions are built in a large scale area with a complicated climate and unstable geology. This paper discusses potential applications of integrated InSAR and GPS to monitor a large-scale ground movement due to hydropower developments. The integration of InSAR and GPS can provide a cost-effective means for monitoring deformation of hydropower developments. Moreover, two novel methods, both the improved spatial interpolating method and estimation of 3D surface motion velocities method, are proposed and the experimental results and analysis are given in this paper.

关键词： InSAR GPS hydraulic and hydropower engineering slides monitoring

Scheduling Policies for Federated Learning in Wireless Networks: An Overview

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ZTE Communications 2020年第2期18卷 11-19页

作者： SHI Wenqi SUN Yuxuan huang xiufeng ZHOU Sheng NIU Zhisheng Department of Electronic Engineering Tsinghua UniversityBeijing 100084China

Due to the increasing need for massive data analysis and machine learning model training at the network edge, as well as the rising concerns about data privacy, a new distrib?uted training framework called federated learning (FL) has emerged and attracted much at?tention from both academia and industry. In FL, participating devices iteratively update the local models based on their own data and contribute to the global training by uploading mod?el updates until the training converges. Therefore, the computation capabilities of mobile de?vices can be utilized and the data privacy can be preserved. However, deploying FL in re?source-constrained wireless networks encounters several challenges, including the limited energy of mobile devices, weak onboard computing capability, and scarce wireless band?width. To address these challenges, recent solutions have been proposed to maximize the convergence rate or minimize the energy consumption under heterogeneous constraints. In this overview, we first introduce the backgrounds and fundamentals of FL. Then, the key challenges in deploying FL in wireless networks are discussed, and several existing solu?tions are reviewed. Finally, we highlight the open issues and future research directions in FL scheduling.

关键词： federated learning wireless network edge computing scheduling

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氯霉素片的含量测定方法

中国医院药学杂志 2000年第4期20卷 214-216页

作者：黄秀凤北海市药品检验所广西北海536000

目的 :考察含有杂质的氯霉素片的含量测定方法。方法 :采用药典法紫外分光光度法和微生物检定法测定含杂质的氯霉素片含量。结果 :两种方法差异存在显著性。结论 :对于含有杂质的氯霉素片。

关键词：氯霉素片含量测定紫外分光光度法

The characteristics of body surface area of Han ethnicity college students in Guangxi

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The characteristics of body surface area of Han ethnicity co...

Study on Deformation of Lattice Sandwich Structure Subjected to Uniform Water Pressure

中国解剖学会2013年年会

作者： Shu Fangyi huang xiufeng Wang Jinhua Lin Chaowen Institute of Anthropology Youjiang Medical University for Nationalities

＜正＞To study the growth and development in stature,weight and body surface area of Han ethnicity undergraduate tudents in Guangxi,and to provide some data on somatotype of Han ethnicity undergraduate students in Gua...

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Study on Deformation of Lattice Sandwich Structure Subjected...

The genetic structure of Sui people in southwest China

第十二届武汉地区船舶与海洋工程研究生学术论坛

作者： Tauhid Ahmed Zhang Zhenhua Deng Bo huang xiufeng Naval University of Engineering College of naval architecture and ocean engineering

Sandwich panels composed of pyramidal cellular cores and solid face plates are presented to high hydrostatic pressure. The performance of this hybrid composite structure under high hydrostatic pressure is numerically studied, considering the geometric variations of the lattice core. The panels were assumed to be made from marine grade ductile stainless steel. Different design parameters were considered, including material properties, thickness of face plate, and diameter of the unit cell strut member. The structures responses were compared to those of monolithic solid plates of equivalent weight. The hydrostatic pressure given to the sandwich panels was varied up to 10 MPa s by changing the operating water depth of the structure. A decoupled finite element model has been used to computationally study the quasi-static response of the structures. The model predicts structural deformations quite well and is used to identify the deformation sequence during changing depth and the face plate and core failure mechanisms. Optimally designed sandwich plates can sustain hydrostatic pressures with two to three times smaller deformations than the monolithic plates of the same mass and material. The model is used to discuss several issues relevant to the design of effective pyramidal sandwich plates, including differing radius and thickness of plates and core materials, the role of core strength, and the relation between sandwich plates and same weight monolithic solid plates.

关键词： Lattice materials Finite element analysis Plastic buckling Sandwich panels Hydrostatic pressure

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The genetic structure of Sui people in southwest China

聚脲涂覆三维负泊松比点阵结构的静态力学性能研究

2018中国遗传学会第十次全国会员代表大会暨学术讨论会

作者： xiufeng huang Chuan-Chao Wang Yingxiang Li Gang Chen College of Basic Medical Sciences Youjiang Medical University for Nationalities Department of Anthropology and Ethnology Xiamen University

The Sui people are one of the 56 officially recognized ethnic groups living mostly in Guizhou and Guangxi, southwest China. However, there is no genomic data reported from this group until now. Here we collected 68 Sui samples from Huanjiang, Yizhou, Dushan, Sandu, Libo, Duyun, and Nandan, and genotyped with more than half million genomewide single nucleotide polymorphisms（SNPs）. We used Principal Component Analysis（PCA）, ADMIXTURE analysis, f statistics, qpWave and qpAdm to infer the population genetic structure and admixture. Our data revealed that Sui people are genetically similar to the Kam-Sui speaking populations in southwest China, which is consistent with their language affinity. We also observed genetic substructure in Sui people. The Sui people in Huanjiang compared with other Sui groups share more alleles with Miao people and the Sui people in Yizhou share more alleles with Sino-Tibetans, suggesting gene flow between Sui and other surrounding populations.

关键词： Sui people genotype structure

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中国科学：物理学、力学、天文学 2021年第5期51卷 112-130页

作者：黄秀峰张振华海军工程大学舰船与海洋学院武汉430033

本文针对四面内凹金字塔型负泊松比点阵结构在有无聚脲涂覆两种情况下的静态力学性能进行了试验研究.采用增材制造方法制作了不同阵列型式的试验模型,实施了点阵模型的准静态压缩试验和点阵夹层结构的三点弯曲和四点弯曲试验.试验结果表... 详细信息

本文针对四面内凹金字塔型负泊松比点阵结构在有无聚脲涂覆两种情况下的静态力学性能进行了试验研究.采用增材制造方法制作了不同阵列型式的试验模型,实施了点阵模型的准静态压缩试验和点阵夹层结构的三点弯曲和四点弯曲试验.试验结果表明,点阵结构在压缩载荷作用下呈现明显的负泊松比效应.涂覆聚脲后点阵结构的力学性能有明显提升,压缩平台应力约为0.6-1.0 MPa;对于多胞结构,总吸能、单位体积变形能和比吸能显著高于未涂覆聚脲模型1-2个数量级;最大吸能效率和压缩利用率大于未涂覆聚脲模型,最高分别可达40.59%和55.15%.由于未涂覆聚脲点阵结构会发生早期材料脆断,其单位体积变形能、比吸能、最大吸能效率和压缩利用率会随单元数量的增加而减小.涂覆聚脲点阵结构的吸能特性受聚脲涂层的厚度影响较大.在弯曲载荷作用下,未涂覆聚脲点阵夹层结构易出现芯层局部压溃现象,靠近压头部位的芯层最易发生破坏,且芯层破坏程度逐层降低;上面板最终呈现折线型变形,下面板呈现弧形变形模式.涂覆聚脲点阵夹层结构的上面板早期呈现"U"型变形模式,且芯层失效范围大幅减小,下面板变形较无聚脲涂覆点阵夹层结构增大19.61%-42.03%.研究结果可为设计轻质化和高效吸能的舰艇防护结构提供借鉴.

关键词：负泊松比点阵结构聚脲压缩试验多点弯曲试验增材制造

Study on Soil Infiltration Capability and Its Impact Factors of Different Land-use Types in Purple Soil Region

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Asian Agricultural Research 2016年第3期8卷 58-62页

作者： Bin MO Xiaoyan CHEN Tao LIU Yicui YANG Zhixing LIN xiufeng huang Qiliang huang Hui JIAN Tujin ZHOU Yunkang SHEN Guangxi Communication Planning Surveying and Designing Institute Key Laboratory of Eco-environments in Three Gorges Region(Ministry of Education) Southwest University Institute of Soil and Water Conservation Chinese Academy of Sciences and Ministry of Water Resources

Soil infiltration capability is the hot spot topic of soil erosion studies and soil physical and chemical properties have great influence on it. A new infiltration method point- source infiltration method was used to precisely evaluate the infiltration capability in different purple soil land- use types. And correlation analysis on soil physical and chemical properties and soil infiltration capability of different land- use types was performed. Results showed that:( i) there is a large difference among soil physical and chemical properties in different land- use types,soil water content,non- capillary porosity,capillary porosity,content of > 0. 25 mm aggregates and organic matter content in the top soil are greater than those in the subsoil;( ii) soil infiltration capability showed differences among different land- use types. Land use showed great effects,in general,the order of decrease on initial infiltration rate and average infiltration rate was: woodland slope > slope farmland >grassland,the order of decrease on steady infiltration rate was: slope farmland > woodland > grassland and the time reaching stable state was:slope farmland > woodland > grassland;( iii) correlation analysis showed that there was a significantly positive correlation between initial infiltration rate and wet sieve MWD value and structural damage rate,and it had a significantly negative correlation with capillary porosity;( iv)steady infiltration rate and non- capillary porosity showed the significantly positive correlation,and it had a significantly negative correlation with the soil bulk density;( v) the average infiltration rate and non- capillary porosity and structural damage rate showed a positive correlation and the correlation coefficient was large and there was a negative correlation between average infiltration rate and soil bulk density and capillary porosity,and the absolute value of correlation coefficient was relatively large. The results of this study can provide the theoret

关键词： Forestry Soil infiltration capability Point source infiltration Different land-use types Soil physical and chemical properties Correlation

聚脲涂覆三维负泊松比点阵夹层结构在碰撞冲击作用下的动态响应试验

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振动与冲击 2021年第17期40卷 259-270页

作者：黄秀峰张振华巫继航海军工程大学舰船与海洋学院武汉430033

针对四面内凹金字塔型负泊松比点阵夹层结构在有无聚脲涂覆两种情况下的抗冲击力学性能进行了研究。采用增材制造方法制作负泊松比点阵结构,通过长直杆冲击试验得到负泊松比点阵夹层结构在碰撞载荷作用下的变形过程、吸能特性和破坏模... 详细信息

针对四面内凹金字塔型负泊松比点阵夹层结构在有无聚脲涂覆两种情况下的抗冲击力学性能进行了研究。采用增材制造方法制作负泊松比点阵结构,通过长直杆冲击试验得到负泊松比点阵夹层结构在碰撞载荷作用下的变形过程、吸能特性和破坏模式。试验结果表明:涂覆聚脲可使该型负泊松比点阵夹层结构提高17%以上的总吸能,增强结构的整体抗冲击能力,显著降低前面板的内凹变形,有效避免芯层大范围的坍塌破坏。相比于未涂覆聚脲模型,涂覆聚脲的负泊松比点阵夹层结构在受冲后保持完整,芯层仍具有承载能力,表现为塑性弯曲变形。

关键词：负泊松比点阵结构聚脲碰撞冲击增材制造