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低压环境下RP-3航空煤油自燃特性研究

安全与环境学报 2024年第2期24卷 545-550页

作者：张沛王学辉王娟王丹汪箭航空工业第一飞机设计研究院机电系统研究所西安710089 中国科学技术大学火灾科学国家重点试验室合肥230026

开展了低压环境下RP-3航空煤油的自燃特性研究,测试了101 kPa、80 kPa、60 kPa、40 kPa、20 kPa五种压力环境下航空煤油自燃点及着火延迟时间数据。结果表明,随着环境压力降低,自燃点升高,并基于谢苗诺夫热自燃理论,建立了耦合压力参数... 详细信息

开展了低压环境下RP-3航空煤油的自燃特性研究,测试了101 kPa、80 kPa、60 kPa、40 kPa、20 kPa五种压力环境下航空煤油自燃点及着火延迟时间数据。结果表明,随着环境压力降低,自燃点升高,并基于谢苗诺夫热自燃理论,建立了耦合压力参数的自燃点预测模型。分析了环境压力对着火延迟时间的影响机制,建立了不同环境压力下的着火延迟时间预测模型。分析了GB/T 5332—2007标准在低压环境下测试存在的问题,并提出了相关改进方法。

关键词：安全工程 RP-3航空煤油低压环境自燃点着火延迟时间

South Asian dairy smallholders: A scoping review of practices and zoonoses

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Asian Pacific journal of Tropical Medicine 2023年第10期16卷 446-452页

作者： Emily Schembri Angus j D Campbell juan Pablo Villanueva-Cabezas Melbourne School of Population and Global Health The University of MelbourneVictoriaAustralia The Nossal Institute for Global Health The University of MelbourneVictoriaAustralia The Peter Doherty Institute for Infection and Immunity The University of Melbourne and the Royal Melbourne HospitalVictoriaAustralia

Objective: To identify and discuss on-farm management practices linked to bacterial zoonosis risk in smallholder dairy farmers in South Asia. Methods: This scoping review was conducted as per the PRISMA-ScR guidelines. Five hundred and two publications were retrieved from five online databases using a comprehensive search strategy. Studies were selected if they discussed a farm management practice which impacted human health within a South Asian country. Results: Twenty-two studies were included. Seven management practices relevant to farmers, livestock and their shared environment were identified including raw milk consumption, farm hygiene management, personal protective equipment uses, animal vaccination, cleaning udders, hand washing and disposal of afterbirth materials. Preventive practices were found to be utilized at lower frequencies compared to risk increasing practices. Awareness of bacterial zoonoses is particularly low within the region. Conclusions: Based on the results of this review, it was determined that improving farmer awareness of bacterial zoonotic diseases may favor several of the presented leverage points within the South Asian smallholder dairy system. Relying on formal school education to improve this awareness may not solve this problem, instead, more focus on accessible and affordable zoonoses education and farming programs is required.

关键词： Management practices Zoonoses Dairy Smallholder system

康达喷气叶栅喷气内腔体拓扑优化设计及试验研究

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热能动力工程 2024年第4期39卷 41-50页

作者：黄伟亮张健张敏杜娟江苏大学流体机械工程技术研究中心江苏镇江212013 中国科学院工程热物理研究所数字孪生研究中心北京100190

为了减小从康达喷气叶栅内部流出的喷气方向与叶栅主流方向的偏差,进一步提升康达喷气对流动分离的抑制效果,本文基于流体拓扑优化技术及布置导流肋的方法对康达喷气叶片原始喷气内腔结构进行优化设计。采用数值计算和高速风洞试验评估... 详细信息

为了减小从康达喷气叶栅内部流出的喷气方向与叶栅主流方向的偏差,进一步提升康达喷气对流动分离的抑制效果,本文基于流体拓扑优化技术及布置导流肋的方法对康达喷气叶片原始喷气内腔结构进行优化设计。采用数值计算和高速风洞试验评估优化的喷气内腔结构对康达喷气叶栅气动性能的改善效果。结果表明:优化设计的带肋喷气内腔结构可以减小康达喷气与主流掺混的偏差角,叶片吸力面尾缘的流动分离区域进一步减小;在来流Ma为0.5、攻角为0°、1.25%喷气量下,采用带肋喷气内腔的康达喷气叶栅总压损失系数较采用原始喷气内腔结构降低了7.15%;采用带肋喷气内腔结构能够使叶栅在不同工况条件下的总压损失小于原始内腔结构,且在最佳喷气量下获得最小的总压损失系数。

关键词：康达喷气高负荷压气机流动分离拓扑优化叶栅试验

Extra-pair paternity and antiparasitic defence

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Avian Research 2020年第4期11卷 391-397页

作者： Anders Pape Møller jørgen Skavdal Søraker juan joséSoler Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering College of Life SciencesBeijing Normal UniversityBeijing 100875China Ecologie Systématique et Evolution UniversitéParis-SaclayCNRSAgroParisTech91405 OrsayFrance Centre for Biodiversity Dynamics Department of BiologyNorwegian University of Science and TechnologyHøgskoleringen 5No-7491TrondheimNorway Depto.Ecología Funcional y Evolutiva Estación Experimental de ZonasÁridasCtra.Sacramento S/NLa Cañada de San Urbano04120 AlmeríaSpain

Background:Extra-pair paternity(EPP)in birds provides benefits in terms of more offspring,and characteristics for maintenance of this behaviour have been the subject of *** are known to be transmitted during mating,especially when mating with multiple partners,and factors reducing this cost of multiple mating are ***,plumage brightness and colour intensity have been shown to be important traits to benefits from multiple mating as predicted by sexual *** aim of this study was to investigate the relationship between the rate of extra-pair paternity and the relative size of the uropygial gland at the interspecific level,as the uropygial gland is an exocrine gland hypothesized to produce antiparasitic substances and further identified to affect plumage *** of the expected benefits of large uropygial gland in scenarios of sexual selection,we predicted a positive correlation with ***:We collected information from the literature of uropygial gland size and frequency of extra-pair paternity of 60 avian species of different families and explored the predicted positive correlation between *** did so with means of comparative analyses that considered phylogenetic relationship as random factor and included body mass as *** used Markov chain Monte Carlo generalized linear mixed models that were weighted by number of nests used to estimate extra-pair ***:We detected a positive relationship between level of extra-pair paternity and uropygial gland size at an interspecific *** finding is consistent with the ***:We discuss the importance of this result in scenarios of sexual selection and argue that the detected relationship may have arisen by utilizing antiparasitic secretions through secondary sexual characters indicating parasite resistance.

关键词： Antiparasitic defence Costs of extra-pair paternity Microorganisms Uropygial gland Uropygial secretions

Mutated trimeric RBD vaccines:a platform against variants of concern

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Signal Transduction and Targeted Therapy 2023年第5期8卷 2038-2040页

作者： Belén Aparicio juan j.Lasarte Pablo Sarobe Programa de Inmunología e Inmunoterapia Centro de Investigación Médica Aplicada(CIMACCUN)Universidad de NavarraPamplona31008Spain Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas(CIBEREHD) Pamplona31008Spain IdiSNA Instituto de Investigación Sanitaria de NavarraPamplona31008Spain

He et *** reported in Nature Communications1 the development of a protein vaccine against SASR-CoV-2 Omicron variant consisting of a trimer of the spike protein receptor-binding domain(RBD)of the Delta variant fused to heptad-repeat sequences 1 and *** vaccine induced broad-spectrum neutralizing antibodies and fully protected mice and non-human primates against challenge with live Delta and Omicron virus.

关键词： vaccine vaccines

Residual feed intake divergence during the preweaning period is associated with unique hindgut microbiome and metabolome profiles in neonatal Holstein heifer calves

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journal of Animal Science and Biotechnology 2020年第2期11卷 453-467页

作者： Ahmed Elolimy Abdulrahman Alharthi Mohamed Zeineldin Claudia Parys juan j.Loor Mammalian NutriPhysioGenomics Department of Animal SciencesUniversity of IllinoisUrbanaILUSA Department of Animal Sciences University of IllinoisUrbanaILUSA Department of Animal Production National Research CentreDokkiGizaEgypt Carl R.Woese Institute for Genomic Biology University of IllinoisUrbanaIllinoisUSA Department of Animal Medicine College of Veterinary MedicineBenha UniversityBenhaEgypt Evonik Nutrition&Care GmbH Hanau-WolfgangGermany Division of Nutritional Sciences Illinois Informatics InstituteUniversity of IllinoisUrbanaILUSA

Background:Recent studies underscored that divergence in residual feed intake(RFI)in mature beef and dairy cattle is associated with changes in ruminal microbiome and metabolome profiles which may contribute,at least in part,to better feed *** the rumen in neonatal calves during the preweaning period is underdeveloped until close to weaning,they rely on hindgut microbial fermentation to breakdown undigested diet *** leads to production of key metabolites such as volatile fatty acids(VFA),amino acids,and vitamins that could potentially be absorbed in the hind-gut and help drive growth and *** RFI divergence in neonatal calves is associated with changes in hindgut microbial communities and metabolites is largely ***,the objective of the current study was to determine differences in hindgut microbiome and metabolome in neonatal Holstein heifer calves retrospectively-grouped based on feed efficiency as mostefficient(M-eff)or least-efficient(L-eff)calves using RFI divergence during the preweaning ***:Twenty-six Holstein heifer calves received 3.8 L of first-milking colostrum from their respective dams within 6 h after *** were housed in individual outdoor hutches bedded with straw,fed twice daily with a milk replacer,and had ad libitum access to a starter grain mix from birth to weaning at 42 d of *** were classified into M-eff[n=13;RFI coefficient=−5.72±0.94 kg DMI(milk replacer+starter grain)/d]and L-eff[n=13;RFI coefficient=5.61±0.94 kg DMI(milk replacer+starter grain)/d]based on a linear regression model including the combined starter grain mix and milk replacer DMI,average daily gain(ADG),and metabolic body weight(MBW).A deep sterile rectal swab exposed only to the rectum was collected immediately at birth before colostrum feeding(i.e.,d 0),and fecal samples at d 14,28,and 42(prior to weaning)for microbiome and untargeted metabolome analyses using 16S rRNA gene sequencing and LC-MS.M

关键词： Feed efficiency Gut Metabolomics Microbiota Neonates Newborn Preweaning RFI

从自发到集成:胶东民间面磕子文化特征和传承创新研究

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艺术百家 2024年第2期40卷 147-154页

作者：昌隽如高雯馨孟庆波青岛理工大学艺术与设计学院山东青岛266033 青岛农业大学动漫与传媒学院山东青岛266109

通过对胶东半岛即墨、莱西等地面磕子历史与现状的考察,结合胶东民间艺术在造型、审美和工艺方面的互通性,综合其社会内容的扩充、工艺的融汇及构图审美的拓展,能够发现面磕子视觉图案呈现的一个重要特点和隐形逻辑:多方面的逻辑集成性... 详细信息

通过对胶东半岛即墨、莱西等地面磕子历史与现状的考察,结合胶东民间艺术在造型、审美和工艺方面的互通性,综合其社会内容的扩充、工艺的融汇及构图审美的拓展,能够发现面磕子视觉图案呈现的一个重要特点和隐形逻辑:多方面的逻辑集成性,包括图案知识集成性、工艺集成性、构图集成性,其视觉特征带有明显的从创作自发性到意识集成性的转变历程。通过胶东面磕子图案的艺术转化和语义解读,梳理文化符号的传承脉络,建设文化基因库,可以为传统面磕子与现代视觉设计相结合提供思路。

关键词：胶东民俗面磕子视觉集成性

高职现代产业学院的耦合逻辑、发展掣肘及建设路径研究

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湖北开放职业学院学报 2024年第18期37卷 72-74页

作者：蔡丽娟广东环境保护工程职业学院广东佛山528216

产业体系中的产业链离不开教育链和创新链的支撑。融合政校行企、科研院所多方共建的产业学院是区域经济发展到一定阶段的产物。通过剖析现代产业学院的耦合逻辑、基本特征,探讨当前的发展掣肘,提出适配的现代产业学院、搭建差异化平台... 详细信息

产业体系中的产业链离不开教育链和创新链的支撑。融合政校行企、科研院所多方共建的产业学院是区域经济发展到一定阶段的产物。通过剖析现代产业学院的耦合逻辑、基本特征,探讨当前的发展掣肘,提出适配的现代产业学院、搭建差异化平台、探索新型育人模式、打造“双师双能型”教师队伍和共建课程体系资源五个方面的建设路径,有序推动产教科“三链”深度融合发展。

关键词：高职现代产业学院耦合逻辑掣肘建设路径

大思政视域下中华优秀传统文化传承与传播研究

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湖北开放职业学院学报 2024年第10期37卷 123-124,127页

作者：李雪娟玉溪农业职业技术学院云南玉溪653100

中华优秀传统文化是中华民族文化自信及精神力量的重要源泉,中华优秀传统文化的历史连续性则进一步彰显独特的文化魅力。本文将基于大思政育人培养教育载体分析,明确大思政视域下中华优秀传统文化传承与传播发展的教育意义,充分结合新... 详细信息

中华优秀传统文化是中华民族文化自信及精神力量的重要源泉,中华优秀传统文化的历史连续性则进一步彰显独特的文化魅力。本文将基于大思政育人培养教育载体分析,明确大思政视域下中华优秀传统文化传承与传播发展的教育意义,充分结合新时期大思政育人培养教育需求,制定基于中华优秀传统文化传播、传承发展的育人策略,拓展大思政视域下的中华优秀传统文化育人路径,有效在育人实践方面为中华优秀传统文化的传播与传播发展提供支持。

关键词：大思政中华优秀传统文化传承传播