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Reshaping fecal gut microbiota composition by growing with Polygonum cuspidatum, Houttuynia cordata, and Ipomoea aquatica

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CANADIAN JOURNAL OF MICROBIOLOGY 2019年第7期65卷 522-529页

作者： Zheng, Yao Hu, Gengdong wu, Wei Qiu, Liping Li, Dandan Bing, xuwen Chen, Jiazhang Chinese Acad Fishery Sci Freshwater Fisheries Res Ctr Wuxi Jiangsu Peoples R China

We carried out sequencing of samples cultivated in floating beds with different Chinese medicinal herbs (Control, Houttuynia cordata Thunb., Polygonum cuspidatum, and a combination of H. cordata with Ipomoea aquatica Forssk.;named groups A, B, C, D, respectively) to analyze changes in the composition of gut microbiota of tilapia feces. Fusobacteria (ranging from 49.0% to 73.3%), Firmicutes (12.3%-37.8%), and Proteobacteria (5.1%-23.0%) were found to be the most dominant phyla present in all samples. The operational taxonomic units and the Ace and Chao1 indices of groups A and D were significantly higher than those of group C. Polygonum cuspidatum decreased the species richness and diversity of microbial communities in tilapia intestinal feces. The phylum WCHB1-60, order Enterobacteriales, and genus Plesiomonas significantly decreased (in group A);the species Plesiomonas shigelloides significantly decreased (in groups B and C);and the genus Leucobacter significantly increased (in group D) when compared with the control. The relative abundance of the class Verrucomicrobiae (groups B vs C) significantly decreased. In the presence of I. aquatica, the phylum Bacteroidetes significantly decreased, while the genera Leucobacter and Pelotomaculum significantly increased. The ratio of Bacteroidetes to Firmicutes was significantly higher in groups B and C relative to the controls, while it decreased significantly in group D. The algae (i. e., Anabaena and Microcystis) and beneficial pathogenic bacteria decreased in groups C and D, respectively. In addition, Enterovibrio decreased in all treatment groups. The present data demonstrate that floating bed cultivation with Chinese medicinal herbs significantly alters the gut microbiota of tilapia, which may enhance its immune activity.

关键词： tilapia fecal gut microbiota floating bed cultivation 16S rDNA disease

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硅烷偶联剂改性的短切玄武岩纤维增强三元乙丙橡胶复合材料的研究

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化工新型材料 2024年第S01期52卷 199-204,211页

作者：李辉张卜方赵春霞向东王斌程金波黄浩然张旭文武元鹏西南石油大学新能源与材料学院成都610500

将玄武岩纤维(BF)用硅烷偶联剂KH570改性后,制备了玄武岩纤维增强三元乙丙橡胶(E-BF7)复合材料,研究了玄武岩纤维用量对复合材料力学性能、热稳定性、动态热力学性能、耐水性能以及耐化学液体性能的影响。结果表明:与未加纤维的三元乙... 详细信息

将玄武岩纤维(BF)用硅烷偶联剂KH570改性后,制备了玄武岩纤维增强三元乙丙橡胶(E-BF7)复合材料,研究了玄武岩纤维用量对复合材料力学性能、热稳定性、动态热力学性能、耐水性能以及耐化学液体性能的影响。结果表明:与未加纤维的三元乙丙橡胶相比,添加15份KH570改性的玄武岩纤维BF7得到的三元乙丙橡胶复合材料E-BF7-15,拥有更好的综合性能。其拉伸强度从12.49MPa提高到14.50MPa,提高了16.1%,撕裂强度从41.47MPa提高到51.67MPa,提高了24.6%,其耐水性和耐化学液体性能也得到明显提升。

关键词：三元乙丙橡胶玄武岩纤维复合材料纤维改性硅烷偶联剂

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A Multi-model Object Tracking Algorithm based on Texture and Color Features 19

A Multi-model Object Tracking Algorithm based on Texture and...

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Proceedings of the 2019 8th International Conference on Computing and Pattern Recognition

作者： xuwen Li Wendong Xue LiJuan Shi Qiang wu Beijing University of Technology College of Life Science and Bioengineering Beijing China Beijing University of Technology Information Department Beijing China

ISBN: (纸本)9781450376570

Mean Shift is widely concerned because of its advantages like fast convergence, real-time performance and simple procedure. However, the tracking performance of the traditional Mean Shift algorithm is obviously interfered when the background has the similar color as the target or the illumination changes. Besides, the tracking is easy to defeat in the case of target occlusion and loss of important frames. Therefore, this paper proposes two improvements based on the traditional Mean Shift tracking algorithm. First, the HLBP texture feature and color feature are employed to describe the target feature in order to improve the robustness of the tracking algorithm. Second, multiple models are taken into account to provide more abundant choices for the tracking process which can improve the tacking performance. The result of experiments show that our algorithm is more robust under the case of object occlusion and posture change, and gets better performance in accuracy when the background color and target color are similar or the illumination changes.

关键词： Multi-model Object Tracking Mean Shift Color Features

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A multi-model object tracking algorithm based on texture and color features 8

A multi-model object tracking algorithm based on texture and...

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8th International Conference on Computing and Pattern Recognition, ICCPR 2019

作者： Li, xuwen Xue, Wendong Shi, Lijuan wu, Qiang Beijing University of Technology College of Life Science and Bioengineering Beijing China

ISBN: (纸本)9781450376570

关键词： Color

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Geochemistry and sources of hydrate-bound gas in the Shenhu area, northern south China sea: Insights from drilling and gas hydrate production tests

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JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING 2022年第PartC期208卷 109459-109459页

作者： Liang, Qianyong Xiao, Xi Zhao, Jing Zhang, Wei Li, Yun wu, Xuemin Ye, Jianliang Qin, xuwen Qiu, Haijun Liang, Jinqiang Lu, Jing'an Dong, Yifei Zhang, Tingting Xiong, Yongqiang Jiang, Wenmin Guo, Binbin China Geol Survey Guangzhou Marine Geol Survey Guangzhou 510075 Peoples R China China Geol Survey Nat Gas Hydrate Engn Technol Ctr Guangzhou 510075 Peoples R China Southern Marine Sci & Engn Guangdong Lab Guangzho Guangzhou 511458 Peoples R China Chinese Acad Sci Guangzhou Inst Geochem State Key Lab Organ Geochem Guangzhou 510640 Peoples R China

Research on the origin and source of hydrate-bound gas and its relationship to deep conventional oil and gas accumulation in a basin is critical to understanding the accumulation mechanism of gas hydrates and to resource evaluation of gas hydrate accumulation. In this study, the hydrate-bound gas obtained via pressure coring and the production gas recovered during a production test on a gas hydrate reservoir in the Shenhu area offshore of Southern China were tested and discussed. The geochemical analysis results indicate that methane is the predominant gas, and heavier hydrocarbons (C2+) are also present but in low concentrations. The molecular compositions of the hydrate gas recovered from two production test sites are similar to those of the hydrate-bound gas acquired via pressure coring. In addition to the isotopic composition of the methane, the carbon and hydrogen isotopes of the C2+ hydrocarbons were obtained for the first time. The delta C-13 isotopes of the methane range from -66.6 parts per thousand to -46.2 parts per thousand, indicating that the hydrate-bound gases have a mixed origin, containing both biogenic and thermogenic gases. The plot of delta C-13(1) versus delta C-13(2) suggests that the biogenic and thermogenic hydrocarbons were derived from marine organic matter and terrestrial organic matter, respectively. The isotopic characterization of the hydrate-bound gas reveals that the thermogenic hydrate gas contains both humic-type gas and sapropel-type gas, but the sapropel-type gas is predominant. The source rocks of the thermogenic hydrate gas are interpreted to be both the gas-prone coal measure strata of the Enping Formation and the oil-prone medium-deep lacustrine strata of the Wenchang Formation, the latter of which contributed more to the hydrocarbon supply of the gas hydrates. In addition, the maturity of the source rocks of the thermogenic hydrate gas may be lower than that of the deeply buried conventional hydrocarbons discovered in the Ba

关键词： Gas hydrates Pressure core Production test Hydrate-bound gas Source rocks Migration Shenhu area Northern South China Sea

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基于影像学特征对骨质疏松性椎体压缩骨折病人经皮椎体成形术后同椎体再发骨折的预测研究

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国际医学放射学杂志 2022年第4期45卷 407-413页

作者：吴丽梁治平熊玉超何洁贾妩懿吴迪朗曾旭文陈松广州市红十字会医院放射科广州510220

目的探讨基于影像学特征对骨质疏松性椎体压缩骨折(OVCF)病人经皮椎体成形术(PVP)后的列线图模型预测术椎椎体再发骨折的价值。方法回顾性纳入急性OVCF并行PVP后的病人93例。所有病人均行X线及MRI检查,根据椎体再发骨折诊断标准将病人... 详细信息

目的探讨基于影像学特征对骨质疏松性椎体压缩骨折(OVCF)病人经皮椎体成形术(PVP)后的列线图模型预测术椎椎体再发骨折的价值。方法回顾性纳入急性OVCF并行PVP后的病人93例。所有病人均行X线及MRI检查,根据椎体再发骨折诊断标准将病人分为再发骨折组(48例)和无再发骨折组(45例)。采用t检验和卡方检验比较2组间临床资料及影像特征的差异,对差异有统计学意义的指标进行多因素Logistic回归分析,获取再发骨折的独立危险因素,采用R软件建立列线图模型并绘制其校准曲线。采用受试者操作特征(ROC)曲线评估模型的预测效能,计算ROC曲线下面积(AUC)。应用校准曲线对列线图模型进行验证。结果再发骨折组的椎体高度恢复率、延伸至终板的骨折线、椎体内裂隙(IVC)、骨水泥周围积液及骨水泥-终板未接触(NPEC)与无再发骨折组的差异均有统计学意义(均P<0.05);多因素Logistic回归分析显示延伸至终板的骨折线[优势比(OR)=3.232]、存在IVC(OR=27.117)和NPEC(OR=1.993)及较高的椎体高度恢复率(OR=2.943)为同椎体再发骨折的独立危险因素(均P<0.05)。存在延伸至终板的骨折线的椎体骨质前份前移距离[(3.12±2.62)mm]大于无延伸者[(1.67±2.18)mm](P<0.05)。与不存在IVC病人相比,存在IVC病人的椎体高度恢复率(分别为7.19%±8.60%和12.63%±11.81%)和NPEC发生率[78.38%(58/74)和94.74%(18/19)]均更高(P<0.05)。列线图模型预测再发骨折的AUC为0.860,敏感度0.792,特异度0.844。校准曲线显示列线图预测概率与实际概率一致性尚可。结论基于影像学特征建立的列线图模型能够预测术椎椎体再发骨折。

关键词：骨质疏松性椎体压缩骨折经皮椎体成形术再发骨折列线图磁共振成像数字X线摄影

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纯电池动力船舶续航力适宜性与经济性研究

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船舶与海洋工程 2022年第6期38卷 53-58页

作者：蔡旭雯谭祖胜夏军吴放明韩莉武汉易华船舶设计有限公司湖北武汉430063 武汉理工大学船海与能源动力工程学院湖北武汉430063 江苏海事局江苏南京210009

“碳达峰”和“碳中和”目标的提出加速了船舶能源结构改革的进程,纯电池动力船舶是重要的发展方向之一。为降低纯电池动力船舶的航速和续航力指标对电池容量的需求,达到减少电池对船舶排水量和舱容的占用,降低船舶建造成本和营运成本... 详细信息

“碳达峰”和“碳中和”目标的提出加速了船舶能源结构改革的进程,纯电池动力船舶是重要的发展方向之一。为降低纯电池动力船舶的航速和续航力指标对电池容量的需求,达到减少电池对船舶排水量和舱容的占用,降低船舶建造成本和营运成本的目的,通过对柴油和电池2种能源对船舶排水量和舱容的需求、不同航行工况对电池容量的需求、建造成本和营运成本进行对比分析,提出一种纯电池动力船舶续航力适宜性与经济性分析计算方法。采用该方法对纯电池动力船舶的续航力适宜性与经济性进行计算,可在满足船舶航速和续航力指标要求的前提下配置更少的电池容量,解决纯电池动力船舶发展面临的关键问题。

关键词：纯电池动力电动船续航力适宜性经济性

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基于混流生产模式的装配车间物料配送路径规划方法

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现代制造工程 2021年第7期 109-116页

作者：王昀睿赵旭雯武争利蒋子强西安科技大学机械工程学院西安710054

合理规划物料配送路径能够提升车间生产效率,降低车间物流成本和生产成本。针对混流装配车间配送不及时、费用高等问题,提出基于混流生产模式的物料配送路径规划方法。以工位为物料配送对象,对混流装配车间物料配送环境进行分析,找出混... 详细信息

合理规划物料配送路径能够提升车间生产效率,降低车间物流成本和生产成本。针对混流装配车间配送不及时、费用高等问题,提出基于混流生产模式的物料配送路径规划方法。以工位为物料配送对象,对混流装配车间物料配送环境进行分析,找出混流装配线的物料消耗规律,明确物料配送数量,简化物料配送过程。在此基础上,结合生产实际的时间窗约束,以最小化物料配送总费用为目标建立了物料配送模型,采用改进蚁群算法对该模型进行求解,最后以某视频控制卡混流装配车间为实例,验证了该方法的可行性和有效性。

关键词：混流装配物料配送路径规划蚁群算法

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新冠病毒抗原/抗体检测闭环管控体系构建

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中国药业 2023年第6期32卷 7-10页

作者：温天文巫军袁学军肖大伟刁勇张旭雯江苏科兴诺生物技术有限公司江苏泰州225300 南京为绿生物科技有限公司江苏南京210032 南京鼓楼医院集团高新医院医学临床中心江苏南京210032 华侨大学医学院福建泉州362021

目的构建科学、合理、有效、可行的新型冠状病毒(简称新冠病毒)抗原/抗体检测全过程闭环管控体系。方法对比核酸检测与抗原/抗体检测的特点,结合新冠病毒特性及当前国家疫情防控实际,探讨构建体系的具体举措。结果通过在抗原/抗体检测... 详细信息

目的构建科学、合理、有效、可行的新型冠状病毒(简称新冠病毒)抗原/抗体检测全过程闭环管控体系。方法对比核酸检测与抗原/抗体检测的特点,结合新冠病毒特性及当前国家疫情防控实际,探讨构建体系的具体举措。结果通过在抗原/抗体检测产品的生产、流通、使用、报告、回收处理及跟踪溯源、数据管理等环节开展管控,可形成以产品唯一识别码(UDI)为基础的抗原/抗体检测全过程闭环管控体系。结论构建的闭环管控体系可分区、分类逐步推广实施,以更科学、合理地实现新冠病毒抗原/抗体检测的安全性、真实性、可行性、可控性。

关键词：新型冠状病毒抗原/抗体检测唯一识别码闭环管控药品监管

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Molecular Dynamics Simulation of the Interaction between Common Metal Ions and Humic Acids

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WATER 2020年第11期12卷 3200-3200页

作者： wu, Xu Xia, Yu Yuan, Lianhua Xia, Kaiyu Jiang, Yu Li, Na He, xuwen China Univ Min & Technol Beijing Sch Chem & Environm Engn Beijing 100083 Peoples R China

Humic acids (HAs) have important environmental and geochemical effects on soil, water environments and sediment. HAs strongly complex some metal ions, which affects the migration of metal ions and the colloidal aggregation of HA. Here, the complexation of Ca2+ and Mg2+ with HA in aqueous solution under neutral conditions has been systematically studied by molecular dynamics (MD) simulation. The results show that the aggregation of HA is caused by the complexation of HA and metal ions, mainly due to the intermolecular bridging between Ca2+, Mg2+ and COO- groups. Monodentate and bidentate coordinations have been found between Ca2+ and COO- groups of different HA molecules in the same simulation system. Mg2+ only has a monodentate coordination with COO- group.

关键词： humic acids metal ions aggregation molecular dynamics simulation

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