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Diatomic Fe-co catalysts synergistically catalyze oxygen evolution reaction

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Nano Research 2024年第5期17卷 3794-3800页

作者： Tianmi Tang Jingyi Han Zhenlu Wang Xiaodi Niu Jingqi guan Institute of Physical chemistry College of ChemistryJilin UniversityChangchun 130021China college of Food Science and Engineering Jilin UniversityChangchun 130062China

The design of diatomic catalysts with uniformly dispersed metal atoms is expected to improve catalytic performance,which is con.ucive to the intensive comprehending of the synergistic mechanism between dual-metal sites for the oxygen evolution reaction(OER)at the atomic ***,we design a strategy to immobilize bimetallic Fe-co atoms onto nitrogen-doped graphene to obtain a diatomic catalyst(DA-Fc-NG)with FeN_(3)-con.(3) *** DA-Fc-NG shows excellent OER activity with a low overpotential(η_(10)=268 mV),which is superior to commercial iridium dioxide *** calculations uncover that the excellent activity of DA-Fc-NG is due to the interaction between Fe and co diatoms,which causes charge rearrangement and induces the adsorption of intermediates on the Fe-O-co bridge structure,thus improving the catalytic OER *** work is of great significance for the design of highly active diatomic catalysts to replace noble metal catalysts for energy-related applications.

关键词： oxygen evolution reaction diatomic catalyst FeN_(3)-con.(3) X-ray absorption spectroscopy(XAS)spectrum theoretical calculation

Bacteria colonization and gene expression related to immune function in colon mucosa is associated with growth in neonatal calves regardless of live yeast supplementation

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Journal of Animal Science and Biotechnology 2024年第5期15卷 1980-1995页

作者： Koki Nishihara clothilde Villot Lautaro cangiano Le Luo guan.Michael Steele Department of Animal Biosciences Animal Science and NutritionUniversity of GuelphGuelphON N1G 1Y2Canada Department of Agricultural Food and Nutritional ScienceUniversity of AlbertaEdmonton T6G 2P5Canada Lallemand SAS Blagnac F‑31702France Department of Animal and Dairy Sciences University of Wisconsin-MadisonMadisonWIUSA Faculty of Land and Food Systems The University of British ColumbiaVancouverBC V6T 1Z4Canada Present Address:Department of Animal Biosciences University of GuelphGuelphON N1G 2W1Canada

Background As Holstein calves are susceptible to gastrointestinal disorders during the first week of life,understanding how intestinal immune function develops in neonatal calves is important to promote better intestinal *** probiotics in early life may con.ribute to host intestinal health by facilitating beneficial bacteria colonization and developing intestinal immune *** objective of this study was to characterize the impact of early life yeast supplementation and growth on colon mucosa-attached bacteria and host immune *** Twenty Holstein bull calves received no supplementation(con.or Saccharomyces cerevisiae boulardii(ScB)from birth to 5 d of *** tissue biopsies were taken within 2 h of life(D0)before the first colostrum feeding and 3 h after the morning feeding at d 5 of age(D5)to analyze mucosa-attached bacteria and colon *** sequencing showed that there was no difference inαandβdiversity of mucosa-attached bacteria between day and treatment,but bacteria related to diarrhea were more abundant in the colon mucosa on D0 compared to *** addition,q PcR indicated that the absolute abundance of Escherichia coli(***)decreased in the colon mucosa on D5 compared to D0;however,that of Bifidobacterium,Lactobacillus,and Faecalibacterium prausnitzii,which could competitively exclude ***,increased in the colon mucosa on D5 compared to ***-sequencing showed that there were no differentially expressed genes between con.and ScB,but suggested that pathways related to viral infection such as“Interferon Signaling”were activated in the colon mucosa of D5 compared to *** Growth affected mucosa-attached bacteria and host immune function in the colon mucosa during the first 5 d of life in dairy calves independently of ScB *** early life,opportunistic pathogens may decrease due to intestinal environmental changes by beneficial bacteria and/or host immune *** activation

关键词： colon biopsy Dairy calves RNA-sequencing Saccharomyces cerevisiae boulardii 16S rRNA amplicon.sequencing

real-time tracking of fast-moving object in occlusion scene

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Journal of Systems Engineering and Electronics 2024年第3期35卷 741-752页

作者： LI Yuran LI Yichen ZHANG Monan YU Wenbin guan.Xinping Department of Automation Shanghai Jiao Tong UniversityShanghai 200240China Key Laboratory of Systems con.rol and Information Processing Ministry of Education of ChinaShanghai 200240China

Tracking the fast-moving object in occlusion situations is an important research topic in computer vision. Despite numerous notable con.ributions have been made in this field,few of them simultaneously incorporate both object's extrinsic features and intrinsic motion patterns into their methodologies,thereby restricting the potential for tracking accuracy improvement. In this paper, on the basis of efficient con.olution operators(EcO) model, a speed-accuracy-balanced model is put forward. This model uses the simple correlation filter to track the object in real-time, and adopts the sophisticated deep-learning neural network to extract high-level features to train a more complex filter correcting the tracking mistakes, when the tracking state is judged to be poor. Furthermore, in the con.ext of scenarios involving regular fast-moving, a motion model based on Kalman filter is designed which greatly promotes the tracking stability, because this motion model could predict the object's future location from its previous movement pattern. Additionally,instead of periodically updating our tracking model and training samples, a con.trained con.ition for updating is proposed,which effectively mitigates con.amination to the tracker from the background and undesirable samples avoiding model degradation when occlusion happens. From comprehensive experiments, our tracking model obtains better performance than EcO on object tracking benchmark 2015(OTB100), and improves the area under curve(AUc) by about 8% and 32% compared with EcO, in the scenarios of fast-moving and occlusion on our own collected dataset.

关键词： speed-accuracy balanced motion modeling con.trained updater

统筹“三教”协同创新视域下的新加坡教育改革探究

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中国职业技术教育 2024年第6期 28-37页

作者：任睿文关晶上海师范大学教育学院上海师范大学教育学院教育管理系上海师范大学长三角教育发展研究院职教研究中心

新加坡虽未有统筹“三教”协同创新的提法,但在近年的教育改革中已有将三者协同发展的实践,具体表现在建立“三教”转换通道、实行课程教学改革、创设技术学士学位、构建学分兑换机制与设立继续教育中心等方面。借鉴新加坡经验,我国应... 详细信息

新加坡虽未有统筹“三教”协同创新的提法,但在近年的教育改革中已有将三者协同发展的实践,具体表现在建立“三教”转换通道、实行课程教学改革、创设技术学士学位、构建学分兑换机制与设立继续教育中心等方面。借鉴新加坡经验,我国应通过在“三教”间建立灵活的衔接转换机制、实施终身教育取向的课程教学改革、增设职业本科技术学位、完善国家资历框架制度、推动高等院校继续教育模式革新等方式,将三类教育统筹协同,实现创新式发展。

关键词：新加坡高等教育职业教育继续教育协同创新

Plant essential oils combined with organic acids restored lipopolysaccharide-induced leaky intestine via gut microbial modulation in weaned piglets

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ANIMAL NUTRITION 2024年第3期18卷 419-432页

作者： Zheng, Xiaoyu Wang, Yibo Zhou, Xuemei Deng, Tanyi Zhao, Yueqi Fu, Zhichao Wei, Yulong Ma, Wen Zhang, Shihai guan. Wutai chen, Fang South china Agr Univ Coll Anim Sci State Key Lab Swine & Poultry Breeding Ind Guangzhou 510642 Peoples R China South china Agr Univ Guangdong Lab Lingnan Modern Agr Guangzhou 510642 Peoples R China South china Agr Univ Coll Anim Sci Guangzhou 510642 Peoples R China South china Agr Univ Natl Engn Res Ctr Breeding Swine Ind Guangzhou 510642 Peoples R China

Intestine derived lipopolysaccharide (LPS) is closely related to systemic inflammation and disorders, yet little is known about its roles in the weanling stress of piglets and its potential as a nutritional intervention target. This study aimed to investigate the potential of essential oils (EO) and organic acids (OA) in mitigating weaning stress in piglets by modulating the circulation of intestine derived LPS. Seventytwo weaned piglets at 21 d old with body weight of 8.12 +/- 0.168 kg were randomly divided into a con.rol group (con. and an experimental group, each con.isting of six pens with six piglets per pen, and were fed either a basal diet or a basal diet supplemented with 3 kg/t OA + 500 g/t EO (EO + OA). On the 14th day of the feeding trial, 12 weaned piglets were randomly selected from the con.group, and 6 piglets were selected from the experimental group. Based on diet composition and stress treatment, these 18 piglets were divided into the following three groups: 1) con.group. Piglets were fed a basal diet and received an intraperitoneal injection of saline as a con.rol. 2) LPS group. Piglets were fed a basal diet and received an intraperitoneal injection of LPS (100 mg/kg body weight) to induce stress. 3) EO + OA + LPS group. Piglets were fed a basal diet supplemented with EO and OA and received an intraperitoneal injection of LPS (100 mg/kg body weight) to induce stress. The results showed that EO + OA significantly ameliorated the oxidative imbalance and inflammation disorder induced by LPS in piglets' serum and intestine by inhibiting the activation of the Toll-like receptor 4 (TLR4)/nuclear factor- kappa B (NF-kB)/mitogen-activated protein kinase (MAPK) signaling pathway. Furthermore, compared to the LPS group, supplementation with EO + OA restored LPS-induced reductions in Bcl-2 protein expression in the piglets' intestines (P P cal damage; it also enhanced both the protein expression and relative gene expression of

关键词： Weaned piglet Essential oil Organic acid Gut microbiota Lipopolysaccharide WEANING STRESS BARRIER HEALTH

现代逻辑的运作密码——黑格尔概念逻辑的“概念”新释

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求是学刊 2024年第2期51卷 36-48页

作者：郭冠宇东南大学人文学院哲学与科学系南京211189

黑格尔的“逻辑科学”是一种现代逻辑,它具有为现代世界提供逻辑基础、与诸多现当代思潮交流对话、反思现代科技话语等重要现代价值。在“逻辑科学”中,概念逻辑开篇的“概念”被黑格尔称为“概念之概念”,它充分展现了否定性自相联系... 详细信息

黑格尔的“逻辑科学”是一种现代逻辑,它具有为现代世界提供逻辑基础、与诸多现当代思潮交流对话、反思现代科技话语等重要现代价值。在“逻辑科学”中,概念逻辑开篇的“概念”被黑格尔称为“概念之概念”,它充分展现了否定性自相联系这一思辨原理的运行机制,是整个思辨性现代逻辑模型的中心与运作密码。实体是“概念”的直接前提与直接起源,先验自我意识则与“概念”具有内在结构上的家族相似性,因而黑格尔一方面通过对斯宾诺莎式实体之自因的厘革来开辟出“概念”的自身规定,另一方面他从对康德的自我意识与范畴观的诠释来刻画“概念”的一元论特征,并且把“概念”的逻辑构造揭示为普遍性、特殊性、个体性的内在统一,即一种在双重否定性中自相联系的动态结构。

关键词：黑格尔康德斯宾诺莎逻辑学概念实体

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大运河枢纽洪泽湖大堤石刻的数字化创新

淮阴工学院学报 2024年第4期33卷 1-7,70页

作者：关荣淮阴工学院设计艺术学院江苏淮安223299

洪泽湖大堤石刻主要包括工程碑记石刻、御题石刻、吉祥图案石刻、吉祥文字石刻等。石刻内容丰富、镌刻精美,蕴含着丰富的历史信息和文化基因。然而随着湖水的侵蚀、自然气候和人为的破坏,石刻面临着前所未有的损害危机,开展数字化保护... 详细信息

洪泽湖大堤石刻主要包括工程碑记石刻、御题石刻、吉祥图案石刻、吉祥文字石刻等。石刻内容丰富、镌刻精美,蕴含着丰富的历史信息和文化基因。然而随着湖水的侵蚀、自然气候和人为的破坏,石刻面临着前所未有的损害危机,开展数字化保护已迫在眉睫。本研究选取代表性石刻,对其造型结构、图案与纹饰进行数字化创新性设计与应用,主要方法是将石刻中所蕴含的美好寓意及大堤文化的历史信息与现代化的视觉审美相结合,通过三维模型的处理和图像的深度配合,实现对洪泽湖大堤石刻的三维建模与文化衍生品的设计开发,开展数字化保护与应用,为科普和传承大堤石刻文化和运河水居文化提供参考路径和可行性方案。

关键词：洪泽湖大堤石刻石刻纹样数字化创新

融合行业信息案例的“建设工程招投标与合同管理实务”课程改革探究

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吉林省教育学院学报 2024年第8期40卷 14-18页

作者：王冠大连财经学院

作为工程管理类专业中必修的专业课程，“建设工程招投标与合同管理实务”知识在各大工程项目中都有所应用。但由于此课程天然存在知识驳杂、文本量大、理论多、政策更新快等特征，因此在实践教学中该课程的教学难度很大，学生的学习兴... 详细信息

作为工程管理类专业中必修的专业课程，“建设工程招投标与合同管理实务”知识在各大工程项目中都有所应用。但由于此课程天然存在知识驳杂、文本量大、理论多、政策更新快等特征，因此在实践教学中该课程的教学难度很大，学生的学习兴趣也相对较差。本文围绕将行业信息案例融合“建设工程招投标与合同管理实务”课程的具体方法进行探讨分析，意在借用职业资格考试的教学内容，解决传统教材更新较慢的问题，并拓展教师的知识储备，借助行业真实工作案例，利用信息技术创建工程招投标案例数据库，为教学过程提供更多实践机会，研究表明，该方法对于学生的课堂表现和最终成绩都有着良好的效果，具备大范围推广的条件。

关键词：行业信息案例建设工程招投标与合同管理实务课程改革

沉陷区河堤边采边复治理方式下的动态填方量预计方法

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金属矿山 2024年第2期 198-204页

作者：李思豪查剑锋关杰张民中国矿业大学环境与测绘学院江苏徐州221116 皖北煤电集团有限责任公司五沟煤矿安徽淮北235131 兖矿能源集团股份有限公司杨村煤矿山东济宁272118

煤矿开采引起的河堤变形与破坏显著降低了其防洪安全性能。“先破坏、后治理”的传统处理方式存在修复滞后、防汛压力大的问题,具有较大的安全隐患,甚至诱发溃坝、洪水等重大公共安全事故。边采边复,及时恢复河堤的防洪能力是解决这一... 详细信息

煤矿开采引起的河堤变形与破坏显著降低了其防洪安全性能。“先破坏、后治理”的传统处理方式存在修复滞后、防汛压力大的问题,具有较大的安全隐患,甚至诱发溃坝、洪水等重大公共安全事故。边采边复,及时恢复河堤的防洪能力是解决这一问题的主要技术途径。基于矿山开采沉陷动态过程特征,提出了沉陷区河堤边采边复的设计流程;构建了河堤治理过程中的动态填方量计算模型,并应用于某矿地表河流的河堤采动损害治理工程中。研究结果表明:采用边采边复的治理方式对沉陷区河堤进行治理,可以降低在采动过程中的河水外溢风险,同时减轻了采动损害对河堤的破坏程度;提出的动态填方量预计方法可实现对河堤各治理阶段土方量的准确预计,能够满足实际工程需求,为河堤治理工程设计提供了依据。

关键词：边采边复概率积分法开采沉陷预计河堤治理