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Dual-basis reconstruction techniques for tomographic PIV

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Science China(Technological Sciences) 2015年第11期58卷 1963-1970页

作者： YE ZhiJian GAO Qi WANG hongping wei RunJie WANG JinJun Fluid Mechanics Key Laboratory of Education Ministry Beijing University of Aeronautics and Astronautics Microvec Pte.Ltd.

As an inverse problem, particle reconstruction in tomographic particle image velocimetry attempts to solve a large-scale underdetermined linear system using an optimization technique. The most popular approach, the multiplicative algebraic reconstruction technique(MART), uses entropy as an objective function in the optimization. All available MART-based methods are focused on improving the efficiency and accuracy of particle reconstruction. However, those methods do not perform very well on dealing with ghost particles in highly seeded measurements. In this report, a new technique called dual-basis pursuit(DBP), which is based on the basis pursuit technique, is proposed for tomographic particle reconstruction. A template basis is introduced as a priori knowledge of a particle intensity distribution combined with a correcting basis to enable a full span of the solution space of the underdetermined linear system. A numerical assessment test with 2D synthetic images indicated that the DBP technique is superior to MART method, can completely recover a particle field when the number of particles per pixel(ppp) is less than 0.15, and can maintain a quality factor Q of above 0.8 for ppp up to 0.30. Unfortunately, the DBP method is difficult to utilize in 3D applications due to the cost of its excessive memory usage. Therefore, a dual-basis MART was designed that performed better than the traditional MART and can potentially be utilized for 3D applications.

关键词：代数重建技术粒子图像测速技术基础断层 PIV 优化技术线性系统沃尔玛

Folding beam-type piezoelectric phononic crystal with low-frequency and broad band gap

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Applied Mathematics and Mechanics(English Edition) 2017年第3期38卷 411-422页

作者： Shan JIANG Longxiang DAI Hao CHEN hongping HU wei JIANG Xuedong CHEN Department of Mechanics Huazhong University of Science and Technology Wuhan 430074 China Hubei Key Laboratory of Engineering Structural Analysis and Safety Assessment Huazhong University of Science and Technology Wuhan 430074 China State Key Laboratory of Digital Manufacturing Equipment and Technology Huazhong University of Science and Technology Wuhan 430074 China

A folding beam-type piezoelectric phononic crystal model is proposed to isolate vibration. Two piezoelectric bimorphs are joined by two masses as a folding structure to comprise each unit cell of the piezoelectric phononic crystal. Each bimorph is connected independently by a resistive-inductive resonant shunting circuit. The folding structure extends the propagation path of elastic waves, while its structure size remains quite small. Propagation of coupled extension-flexural elastic waves is studied by the classical laminated beam theory and transfer matrix method. The theoretical model is further verified with the finite element method(FEM). The effects of geometrical and circuit parameters on the band gaps are analyzed. With only 4 unit cells, the folding beam-type piezoelectric phononic crystal generates two Bragg band gaps of 369 Hz to1 687 Hz and 2 127 Hz to 4 000 Hz. In addition, between these two Bragg band gaps, a locally resonant band gap is induced by resonant shunting circuits. Appropriate circuit parameters are used to join these two Bragg band gaps by the locally resonant band ***, a low-frequency and broad band gap of 369 Hz to 4 000 Hz is obtained.

关键词： folding beam-type structure phononic crystal band gap wave propagation piezoelectric

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多酚自组装抗菌生物材料的构建及其应用进展

茶叶科学 2024年第1期44卷 1-15页

作者：徐伟俞蓉欣张相春张以稳陈红平田宝明郑芹芹吴媛媛夏琛韦兵阜阳师范大学生物与食品工程学院安徽阜阳236037 中国农业科学院茶叶研究所浙江杭州310008 浙江大学茶叶研究所浙江杭州310058 杭州英仕利生物科技有限公司浙江杭州310000

细菌感染可引起多种疾病,是全球主要死亡原因之一。抗生素一直是治疗细菌感染类疾病的主要策略,但抗生素的过量和不合理使用已导致多种细菌产生耐药性,严重威胁人类生命健康。植物多酚具有天然的抗菌特性,但酚羟基结构的不稳定性限制了... 详细信息

细菌感染可引起多种疾病,是全球主要死亡原因之一。抗生素一直是治疗细菌感染类疾病的主要策略,但抗生素的过量和不合理使用已导致多种细菌产生耐药性,严重威胁人类生命健康。植物多酚具有天然的抗菌特性,但酚羟基结构的不稳定性限制了其生物利用。为解决这个难题,研究者将多酚与其他物质自组装构建新型纳米生物材料,不仅提高了多酚稳定性和生物利用率,还使其协同发挥抗菌活性,在抗菌领域中具有巨大的应用潜力和优势。综述了近年来不同类型的多酚自组装生物纳米材料构建策略及抗菌性能,包括多酚-金属、多酚-水凝胶、多酚-壳聚糖、多酚-蛋白质和多酚-脂质体等材料,指出了新型多酚自组装生物材料在抗菌领域应用中面临的问题,并对其应用前景进行了展望。

关键词：多酚自组装纳米材料抗菌应用

同方期刊数据库博看期刊评论

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高架匝道波形钢腹板PC组合箱梁施工技术

建筑施工 2011年第2期33卷 136-138页

作者：魏红萍陈建杰孔祥荣陈福祥徐奇上海市浦东新区建设(集团)有限公司 200136 上海弘或市政工程有限公司 2000124

以上海中环线济阳路高架匝道工程采用了波形钢腹板PC组合箱梁施工为例,详细探讨了其施工工艺,并着重对波形钢腹板的制作、吊装、剪力件以及体外预应力的施工进行了阐述,介绍了其有别于钢筋混凝土箱梁的关键工序,以供业内参考。

关键词：高架匝道波形钢腹板PC组合连续箱梁施工技术

Source of propagules of the fouling green macroalgae in the Subei Shoal,China

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Acta Oceanologica Sinica 2018年第4期37卷 102-108页

作者： SONG wei JIANG Meijie WANG Zongling WANG hongping ZHANG Xuelei FU Mingzhu Key Laboratory of Science and Engineering for Marine Ecology and Environment The First Institute of OceanographyState Oceanic Administration Laboratory of Marine Ecology and Environmental Science Qingdao National Laboratory for Marine Science and Technology Hunan Provincial Key Laboratory of Phytohormones and Growth Development Hunan Agricultural University

Since 2007,large-scale green tides dominated by Ulva prolifera consecutively bloomed in the Yellow Sea and caused great economic *** fouling *** on the Pyropia yezoensis aquaculture rafts in the Subei Shoal was regarded as the major source of the floating ***,it was still unclear about the seed source of fouling green macroalgae attached on the *** this study,the field surveys and the indoor experiments were conducted to reveal the source of propagules of the fouling green macroalgae on the rafts and to study the anti-fouling material for *** aquaculture rafts which could possibly be a feasible strategy to control the green tides in the Yellow *** results showed that（1） micro-propagules of several green macroalgal species,including ***,***,***,***,and Blidingia *** in the waters and sediments in the Subei Shoal and their proportion remarkably changed over time;（2） the bamboo poles with peeling treatment could significantly reduce the amount of *** micro-propagules *** study confirmed that the micro-propagules distributed in the Subei Shoal area were the precursors of the green tides,and provided a feasible method to control the Yellow Sea large-scale green tides at the beginning.

关键词： green tides source of propagules Ulva prolifera anti-fouling

Exploration and Practice of Database System Course Based on KAPI Teaching Modality Under the Emerging Engineering Education

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计算机教育 2023年第12期 246-256页

作者： Hongqi Li Kexin Sun wei Lu Yong Li Chunyan Ma hongping Gan the School of Software Northwestern Polytechnical UniversityXi’an710072China the School of Information Technology Xi’an University of Finance and EconomicsXi’an710100China

Nowadays,it is extremely urgent for the software engineering education to cultivate the knowledge and ability of database talents in the era of big *** this end,this paper proposes a talent training teaching modality that integrates knowledge,ability,practice,and innovation(KAPI)for Database System *** teaching modality contains three parts:top-level design,course learning process,and course assurance and *** top-level design sorts out the core knowledge of the course and determines a mixed online and offline teaching *** course learning process emphasizes the correspondence transformation relationship between core knowledge points and ability enhancement,and the course is practiced in the form of experimental projects to finally enhance students’innovation consciousness and *** assurance and evaluation of the course are based on the outcome-based education(OBE)orientation,which realizes the objective evaluation of students’learning process and final *** teaching results of the course in the past 2 years show that the KAPI-based teaching modality has achieved better ***,students are satisfied with the evaluation of the *** teaching modality in this paper helps to stimulate students’initiatives,and improve their knowledge vision and practical ability,and thus helps to cultivate innovative and high-quality engineering talents required by the emerging engineering education.

关键词： Database system teaching KAPI modality Hybrid teaching mode OBE concept Teaching reform

噬菌体裂解酶专家共识——齐鲁公共卫生云讲堂

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中国兽医学报 2021年第8期41卷 1451-1457页

作者：顾敬敏杨航李锦铨严亚贤卢雪梅张炜胡永飞王冉童贻刚胡福泉危宏平刘玉庆韩文瑜吉林大学动物医学学院吉林长春130062 中国科学院武汉病毒研究所湖北武汉430071 华中农业大学食品科学技术学院湖北武汉430070 上海交通大学农业与生物学院上海200240 山东大学微生物技术国家重点实验室山东青岛250100 南京农业大学动物医学院江苏南京210095 中国农业大学动物营养学国家重点实验室北京100083 江苏省农业科学院农产品质量安全与营养研究所江苏南京210014 北京化工大学北京100029 陆军军医大学微生物学教研室重庆400038 山东省农业科学院畜牧兽医研究所山东济南250100

随着抗生素持续、不合理应用乃至滥用,使得细菌对抗生素的耐药性日益严重。特别是抗多黏菌素mcr-1基因以及耐万古霉素"超级细菌"的发现,标志着"后抗生素时代"的来临。为了应对细菌的耐药性、抗生素残留所导致的机体免疫力下降以及环境... 详细信息

随着抗生素持续、不合理应用乃至滥用,使得细菌对抗生素的耐药性日益严重。特别是抗多黏菌素mcr-1基因以及耐万古霉素"超级细菌"的发现,标志着"后抗生素时代"的来临。为了应对细菌的耐药性、抗生素残留所导致的机体免疫力下降以及环境污染等问题,我国正在全力推进"减抗、限抗、禁抗"战略的实施,这是破解抗生素长期应用引发系列问题的根本之策,是事关畜禽健康养殖、公共卫生安全和人类健康的一件大事。这一战略的实施也对"安全、有效、质量可控,无残留、无污染"的绿色新型替抗剂的研发提出新的需求,亟需在这些方面寻求新的突破口,其中噬菌体裂解酶是一个重要的突破方向。噬菌体裂解酶作为一类新型抗菌蛋白,在应对细菌耐药性方面具有独特优势,在减抗、降抗中具有公共卫生战略价值。为推动噬菌体裂解酶的研究与应用,现汇聚全国十多位从事噬菌体裂解酶研究的专家和相关企业,联合齐鲁公共卫生云讲堂、噬菌体国际研讨会和《中国兽医学报》,专题研讨国内外关于噬菌体裂解酶的基础研究成果和实际应用案例,对噬菌体裂解酶的发展趋势进行分析、研判,形成一系列共识。

关键词：噬菌体裂解酶专家共识齐鲁公共卫生云讲堂

基于Web of Science的《果树学报》期刊学术影响力分析

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果树学报 2022年第9期39卷 1710-1717页

作者：张红萍徐伟中国农业大学图书馆北京100193

【目的】客观的评价和认识《果树学报》,为期刊的国际化和影响力提升建设提供参考。【方法】利用文献计量学方法,对SCI引用《果树学报》论文情况进行统计分析。【结果】2011-2020年《,果树学报》发表的论文共有487篇被SCI的683篇论文引... 详细信息

【目的】客观的评价和认识《果树学报》,为期刊的国际化和影响力提升建设提供参考。【方法】利用文献计量学方法,对SCI引用《果树学报》论文情况进行统计分析。【结果】2011-2020年《,果树学报》发表的论文共有487篇被SCI的683篇论文引用,累计被引用次数为816次。有239种期刊引用了《果树学报》的论文。来自中国的大学和科研机构的研究人员是期刊的主要受众,但也有其他40个国家和地区的研究人员关注《果树学报》。国内优秀作者引用《果树学报》产出的论文很多贡献给了国外的期刊。引用《果树学报》论文的文献分别归属74个学科类别,集中在农学、园艺学、遗传学等学科。【结论】《果树学报》在中国具有一定的影响力,但国际影响力尚待提高。建议期刊开辟交叉学科研究专栏,追踪高水平论文作者及其团队研究动态,采取措施吸引优质学术论文,同时在改进官网英文界面、加大海外宣传力度以及突破传统出版模式等几方面采取进一步的举措。

关键词：《果树学报》 SCI 被引分析

痰热清注射液和雾化吸入液治疗慢性阻塞性肺疾病模型大鼠药效比较研究

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辽宁中医药大学学报 2024年第8期26卷 8-12,F0003页

作者：罗倩张广平彭博陈韡亚魏晓露宋玲陈腾飞高云航叶祖光侯红平中国中医科学院中药研究所北京100700

目的比较痰热清注射液和雾化吸入液治疗慢性阻塞性肺疾病(简称慢阻肺)模型大鼠的作用效果。方法Wistar大鼠分为对照组、模型组、阳性组、注射液组和雾化组(高、中、低剂量组),采用细菌脂多糖(LPS)联合烟熏建立慢阻肺动物模型,造模和给药... 详细信息

目的比较痰热清注射液和雾化吸入液治疗慢性阻塞性肺疾病(简称慢阻肺)模型大鼠的作用效果。方法Wistar大鼠分为对照组、模型组、阳性组、注射液组和雾化组(高、中、低剂量组),采用细菌脂多糖(LPS)联合烟熏建立慢阻肺动物模型,造模和给药1个月后测定动物肺功能,检测肺组织的细胞因子,对肺组织进行HE组织病理学染色、Masson染色和糖原染色(PAS),分析各组肺泡的平均线性截距(MLI)、气道壁厚度和PAS阳性细胞数。结果慢阻肺模型组动物出现不同程度的咳嗽、喷嚏,严重者会有呼吸急促、鼻分泌物增加的现象,阳性组,注射液组和雾化吸入中、高剂量组的动物状态较模型组有明显的好转。肺功能结果显示雾化吸入高剂量组和中剂量组的动态顺应性(Cydn)和气道阻力(RI)较注射液组有明显的好转。HE结果显示,阳性组,注射液组,雾化吸入高剂量组和中剂量组动物肺组织肺泡结构相对完整,血管扩张有所改善。与注射液组比较,雾化吸入高剂量组和中剂量组的细胞因子表达、MLI、气道壁厚度、PAS阳性细胞数均有所降低,且差异具有统计学意义。结论痰热清雾化吸入制剂在治疗慢阻肺方面较注射液具有剂量小、效果明显的特色和优势。

关键词：慢阻肺痰热清注射液痰热清吸入液雾化吸入